Remove old jpeg files

cde/lib/DtHelp/Imakefile

@@ -13,14 +13,8 @@ XCOMM $XConsortium: Imakefile /main/25 1996/11/22 11:17:34 drk $
 #define IHaveSubdirs
 #define PassCDebugFlags	/**/
 
-#if defined(LinuxArchitecture) || defined(BSDArchitecture) || \
-    defined(SunArchitecture)
 SUBDIRS = il
 DONES = il/DONE
-#else
-SUBDIRS = il jpeg
-DONES = il/DONE jpeg/DONE
-#endif
 
 EXTRALIBRARYDEPS = $(DONES)
 

cde/lib/DtHelp/JpegUtils.c

@@ -47,7 +47,7 @@
 #include <math.h>
 #include <setjmp.h>
 #include "GraphicsP.h"
-#include "jpeglib.h"
+#include <jpeglib.h>
 #include "cdjpeg.h"
 #include "JpegUtilsI.h"
 

cde/lib/DtHelp/jpeg/Imakefile

@@ -1,55 +0,0 @@
-XCOMM $XConsortium: Imakefile /main/1 1996/11/22 11:15:32 drk $
-#define DoNormalLib	NormalLibDtHelp
-#define DoSharedLib	SharedLibDtHelp
-#define DoDebugLib	DebugLibDtHelp
-#define DoProfileLib	ProfileLibDtHelp
-#define LibName		DtHelp
-#define SoRev		SODTHELPREV
-#define LibHeaders	NO
-#define LibCreate	NO
-#define LargePICTable	YES
-
-#include <Threads.tmpl>
-
-#if defined(LSBBitOrder) && LSBBitOrder
-BIT_ORDER_DEFINES = -DLSB_BIT_ORDER
-#endif
-
-INCLUDES = -I. -I..
-DEFINES = -DDTLIB $(LOCAL_DEFINES) \
-	  -DCDE_INSTALLATION_TOP='"$(CDE_INSTALLATION_TOP)"' \
-	  -DCDE_CONFIGURATION_TOP='"$(CDE_CONFIGURATION_TOP)"' \
-	  -DCDE_USER_TOP='"$(CDE_USER_TOP)"' \
-	  -DOSMAJORVERSION=OSMajorVersion \
-	  -DOSMINORVERSION=OSMinorVersion \
-	  $(ICONV_INBUF_DEFINE) $(BIT_ORDER_DEFINES)
-
-SRCS =  jcomapi.c  jdmainct.c jidctflt.c \
-        jdapimin.c jdmarker.c jidctfst.c \
-        jdapistd.c jdmaster.c jidctint.c \
-        jdatasrc.c jdmerge.c  jidctred.c \
-        jdcoefct.c jdphuff.c  jmemmgr.c \
-        jdcolor.c  jdpostct.c jmemnobs.c \
-        jddctmgr.c jdsample.c jquant1.c \
-        jdhuff.c   jdtrans.c  jquant2.c \
-        jdinput.c  jerror.c   jutils.c
-
-/* WARNING!!!!
- * Any .o's added to this list need to be added to JPEG_OBJS in the
- * parent (DtHelp) Imakefile.
- */
-OBJS =  jcomapi.o  jdmainct.o jidctflt.o \
-        jdapimin.o jdmarker.o jidctfst.o \
-        jdapistd.o jdmaster.o jidctint.o \
-        jdatasrc.o jdmerge.o  jidctred.o \
-        jdcoefct.o jdphuff.o  jmemmgr.o \
-        jdcolor.o  jdpostct.o jmemnobs.o \
-        jddctmgr.o jdsample.o jquant1.o \
-        jdhuff.o   jdtrans.o  jquant2.o \
-        jdinput.o  jerror.o   jutils.o
-
-#include <Library.tmpl>
-
-SubdirLibraryRule($(OBJS))
-
-DependTarget()

cde/lib/DtHelp/jpeg/cdjpeg.h

@@ -35,8 +35,8 @@
 #define JPEG_CJPEG_DJPEG	/* define proper options in jconfig.h */
 #define JPEG_INTERNAL_OPTIONS	/* cjpeg.c,djpeg.c need to see xxx_SUPPORTED */
 #include "jinclude.h"
-#include "jpeglib.h"
-#include "jerror.h"		/* get library error codes too */
+#include <jpeglib.h>
+#include <jerror.h>		/* get library error codes too */
 #include "cderror.h"		/* get application-specific error codes */
 
 

cde/lib/DtHelp/jpeg/jcomapi.c

@@ -1,117 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jcomapi.c /main/2 1996/05/09 03:45:45 drk $ */
-/*
- * jcomapi.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains application interface routines that are used for both
- * compression and decompression.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/*
- * Abort processing of a JPEG compression or decompression operation,
- * but don't destroy the object itself.
- *
- * For this, we merely clean up all the nonpermanent memory pools.
- * Note that temp files (virtual arrays) are not allowed to belong to
- * the permanent pool, so we will be able to close all temp files here.
- * Closing a data source or destination, if necessary, is the application's
- * responsibility.
- */
-
-GLOBAL(void)
-jpeg_abort (j_common_ptr cinfo)
-{
-  int pool;
-
-  /* Releasing pools in reverse order might help avoid fragmentation
-   * with some (brain-damaged) malloc libraries.
-   */
-  for (pool = JPOOL_NUMPOOLS-1; pool > JPOOL_PERMANENT; pool--) {
-    (*cinfo->mem->free_pool) (cinfo, pool);
-  }
-
-  /* Reset overall state for possible reuse of object */
-  cinfo->global_state = (cinfo->is_decompressor ? DSTATE_START : CSTATE_START);
-}
-
-
-/*
- * Destruction of a JPEG object.
- *
- * Everything gets deallocated except the master jpeg_compress_struct itself
- * and the error manager struct.  Both of these are supplied by the application
- * and must be freed, if necessary, by the application.  (Often they are on
- * the stack and so don't need to be freed anyway.)
- * Closing a data source or destination, if necessary, is the application's
- * responsibility.
- */
-
-GLOBAL(void)
-jpeg_destroy (j_common_ptr cinfo)
-{
-  /* We need only tell the memory manager to release everything. */
-  /* NB: mem pointer is NULL if memory mgr failed to initialize. */
-  if (cinfo->mem != NULL)
-    (*cinfo->mem->self_destruct) (cinfo);
-  cinfo->mem = NULL;		/* be safe if jpeg_destroy is called twice */
-  cinfo->global_state = 0;	/* mark it destroyed */
-}
-
-
-/*
- * Convenience routines for allocating quantization and Huffman tables.
- * (Would jutils.c be a more reasonable place to put these?)
- */
-
-GLOBAL(JQUANT_TBL *)
-jpeg_alloc_quant_table (j_common_ptr cinfo)
-{
-  JQUANT_TBL *tbl;
-
-  tbl = (JQUANT_TBL *)
-    (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JQUANT_TBL));
-  tbl->sent_table = FALSE;	/* make sure this is false in any new table */
-  return tbl;
-}
-
-
-GLOBAL(JHUFF_TBL *)
-jpeg_alloc_huff_table (j_common_ptr cinfo)
-{
-  JHUFF_TBL *tbl;
-
-  tbl = (JHUFF_TBL *)
-    (*cinfo->mem->alloc_small) (cinfo, JPOOL_PERMANENT, SIZEOF(JHUFF_TBL));
-  tbl->sent_table = FALSE;	/* make sure this is false in any new table */
-  return tbl;
-}

cde/lib/DtHelp/jpeg/jconfig.h

@@ -1,68 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jconfig.h /main/2 1996/05/09 03:45:58 drk $ */
-/* jconfig.h.  Generated automatically by configure.  */
-/* jconfig.cfg --- source file edited by configure script */
-/* see jconfig.doc for explanations */
-
-#define HAVE_PROTOTYPES 
-#define HAVE_UNSIGNED_CHAR 
-#define HAVE_UNSIGNED_SHORT 
-#undef void
-#undef const
-#undef CHAR_IS_UNSIGNED
-#define HAVE_STDDEF_H 
-#define HAVE_STDLIB_H 
-#undef NEED_BSD_STRINGS
-#undef NEED_SYS_TYPES_H
-#undef NEED_FAR_POINTERS
-#undef NEED_SHORT_EXTERNAL_NAMES
-/* Define this if you get warnings about undefined structures. */
-#undef INCOMPLETE_TYPES_BROKEN
-
-#ifdef JPEG_INTERNALS
-
-#undef RIGHT_SHIFT_IS_UNSIGNED
-#define INLINE __inline
-/* These are for configuring the JPEG memory manager. */
-#undef DEFAULT_MAX_MEM
-#undef NO_MKTEMP
-
-#endif /* JPEG_INTERNALS */
-
-#ifdef JPEG_CJPEG_DJPEG
-
-#define BMP_SUPPORTED		/* BMP image file format */
-#define GIF_SUPPORTED		/* GIF image file format */
-#define PPM_SUPPORTED		/* PBMPLUS PPM/PGM image file format */
-#undef RLE_SUPPORTED		/* Utah RLE image file format */
-#define TARGA_SUPPORTED		/* Targa image file format */
-
-#undef TWO_FILE_COMMANDLINE
-#undef NEED_SIGNAL_CATCHER
-#undef DONT_USE_B_MODE
-
-/* Define this if you want percent-done progress reports from cjpeg/djpeg. */
-#undef PROGRESS_REPORT
-
-#endif /* JPEG_CJPEG_DJPEG */

cde/lib/DtHelp/jpeg/jdapimin.c

@@ -1,429 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdapimin.c /main/2 1996/05/09 03:46:12 drk $ */
-/*
- * jdapimin.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains application interface code for the decompression half
- * of the JPEG library.  These are the "minimum" API routines that may be
- * needed in either the normal full-decompression case or the
- * transcoding-only case.
- *
- * Most of the routines intended to be called directly by an application
- * are in this file or in jdapistd.c.  But also see jcomapi.c for routines
- * shared by compression and decompression, and jdtrans.c for the transcoding
- * case.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/*
- * Initialization of a JPEG decompression object.
- * The error manager must already be set up (in case memory manager fails).
- */
-
-GLOBAL(void)
-jpeg_CreateDecompress (j_decompress_ptr cinfo, int version, size_t structsize)
-{
-  int i;
-
-  /* Guard against version mismatches between library and caller. */
-  cinfo->mem = NULL;		/* so jpeg_destroy knows mem mgr not called */
-  if (version != JPEG_LIB_VERSION)
-    ERREXIT2(cinfo, JERR_BAD_LIB_VERSION, JPEG_LIB_VERSION, version);
-  if (structsize != SIZEOF(struct jpeg_decompress_struct))
-    ERREXIT2(cinfo, JERR_BAD_STRUCT_SIZE, 
-	     (int) SIZEOF(struct jpeg_decompress_struct), (int) structsize);
-
-  /* For debugging purposes, zero the whole master structure.
-   * But error manager pointer is already there, so save and restore it.
-   */
-  {
-    struct jpeg_error_mgr * err = cinfo->err;
-    MEMZERO(cinfo, SIZEOF(struct jpeg_decompress_struct));
-    cinfo->err = err;
-  }
-  cinfo->is_decompressor = TRUE;
-
-  /* Initialize a memory manager instance for this object */
-  jinit_memory_mgr((j_common_ptr) cinfo);
-
-  /* Zero out pointers to permanent structures. */
-  cinfo->progress = NULL;
-  cinfo->src = NULL;
-
-  for (i = 0; i < NUM_QUANT_TBLS; i++)
-    cinfo->quant_tbl_ptrs[i] = NULL;
-
-  for (i = 0; i < NUM_HUFF_TBLS; i++) {
-    cinfo->dc_huff_tbl_ptrs[i] = NULL;
-    cinfo->ac_huff_tbl_ptrs[i] = NULL;
-  }
-
-  /* Initialize marker processor so application can override methods
-   * for COM, APPn markers before calling jpeg_read_header.
-   */
-  jinit_marker_reader(cinfo);
-
-  /* And initialize the overall input controller. */
-  jinit_input_controller(cinfo);
-
-  /* OK, I'm ready */
-  cinfo->global_state = DSTATE_START;
-}
-
-
-/*
- * Destruction of a JPEG decompression object
- */
-
-GLOBAL(void)
-jpeg_destroy_decompress (j_decompress_ptr cinfo)
-{
-  jpeg_destroy((j_common_ptr) cinfo); /* use common routine */
-}
-
-
-/*
- * Abort processing of a JPEG decompression operation,
- * but don't destroy the object itself.
- */
-
-GLOBAL(void)
-jpeg_abort_decompress (j_decompress_ptr cinfo)
-{
-  jpeg_abort((j_common_ptr) cinfo); /* use common routine */
-}
-
-
-/*
- * Install a special processing method for COM or APPn markers.
- */
-
-GLOBAL(void)
-jpeg_set_marker_processor (j_decompress_ptr cinfo, int marker_code,
-			   jpeg_marker_parser_method routine)
-{
-  if (marker_code == JPEG_COM)
-    cinfo->marker->process_COM = routine;
-  else if (marker_code >= JPEG_APP0 && marker_code <= JPEG_APP0+15)
-    cinfo->marker->process_APPn[marker_code-JPEG_APP0] = routine;
-  else
-    ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, marker_code);
-}
-
-
-/*
- * Set default decompression parameters.
- */
-
-LOCAL(void)
-default_decompress_parms (j_decompress_ptr cinfo)
-{
-  /* Guess the input colorspace, and set output colorspace accordingly. */
-  /* (Wish JPEG committee had provided a real way to specify this...) */
-  /* Note application may override our guesses. */
-  switch (cinfo->num_components) {
-  case 1:
-    cinfo->jpeg_color_space = JCS_GRAYSCALE;
-    cinfo->out_color_space = JCS_GRAYSCALE;
-    break;
-    
-  case 3:
-    if (cinfo->saw_JFIF_marker) {
-      cinfo->jpeg_color_space = JCS_YCbCr; /* JFIF implies YCbCr */
-    } else if (cinfo->saw_Adobe_marker) {
-      switch (cinfo->Adobe_transform) {
-      case 0:
-	cinfo->jpeg_color_space = JCS_RGB;
-	break;
-      case 1:
-	cinfo->jpeg_color_space = JCS_YCbCr;
-	break;
-      default:
-	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
-	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
-	break;
-      }
-    } else {
-      /* Saw no special markers, try to guess from the component IDs */
-      int cid0 = cinfo->comp_info[0].component_id;
-      int cid1 = cinfo->comp_info[1].component_id;
-      int cid2 = cinfo->comp_info[2].component_id;
-
-      if (cid0 == 1 && cid1 == 2 && cid2 == 3)
-	cinfo->jpeg_color_space = JCS_YCbCr; /* assume JFIF w/out marker */
-      else if (cid0 == 82 && cid1 == 71 && cid2 == 66)
-	cinfo->jpeg_color_space = JCS_RGB; /* ASCII 'R', 'G', 'B' */
-      else {
-	TRACEMS3(cinfo, 1, JTRC_UNKNOWN_IDS, cid0, cid1, cid2);
-	cinfo->jpeg_color_space = JCS_YCbCr; /* assume it's YCbCr */
-      }
-    }
-    /* Always guess RGB is proper output colorspace. */
-    cinfo->out_color_space = JCS_RGB;
-    break;
-    
-  case 4:
-    if (cinfo->saw_Adobe_marker) {
-      switch (cinfo->Adobe_transform) {
-      case 0:
-	cinfo->jpeg_color_space = JCS_CMYK;
-	break;
-      case 2:
-	cinfo->jpeg_color_space = JCS_YCCK;
-	break;
-      default:
-	WARNMS1(cinfo, JWRN_ADOBE_XFORM, cinfo->Adobe_transform);
-	cinfo->jpeg_color_space = JCS_YCCK; /* assume it's YCCK */
-	break;
-      }
-    } else {
-      /* No special markers, assume straight CMYK. */
-      cinfo->jpeg_color_space = JCS_CMYK;
-    }
-    cinfo->out_color_space = JCS_CMYK;
-    break;
-    
-  default:
-    cinfo->jpeg_color_space = JCS_UNKNOWN;
-    cinfo->out_color_space = JCS_UNKNOWN;
-    break;
-  }
-
-  /* Set defaults for other decompression parameters. */
-  cinfo->scale_num = 1;		/* 1:1 scaling */
-  cinfo->scale_denom = 1;
-  cinfo->output_gamma = 1.0;
-  cinfo->buffered_image = FALSE;
-  cinfo->raw_data_out = FALSE;
-  cinfo->dct_method = JDCT_DEFAULT;
-  cinfo->do_fancy_upsampling = TRUE;
-  cinfo->do_block_smoothing = TRUE;
-  cinfo->quantize_colors = FALSE;
-  /* We set these in case application only sets quantize_colors. */
-  cinfo->dither_mode = JDITHER_FS;
-#ifdef QUANT_2PASS_SUPPORTED
-  cinfo->two_pass_quantize = TRUE;
-#else
-  cinfo->two_pass_quantize = FALSE;
-#endif
-  cinfo->desired_number_of_colors = 256;
-  cinfo->colormap = NULL;
-  /* Initialize for no mode change in buffered-image mode. */
-  cinfo->enable_1pass_quant = FALSE;
-  cinfo->enable_external_quant = FALSE;
-  cinfo->enable_2pass_quant = FALSE;
-}
-
-
-/*
- * Decompression startup: read start of JPEG datastream to see what's there.
- * Need only initialize JPEG object and supply a data source before calling.
- *
- * This routine will read as far as the first SOS marker (ie, actual start of
- * compressed data), and will save all tables and parameters in the JPEG
- * object.  It will also initialize the decompression parameters to default
- * values, and finally return JPEG_HEADER_OK.  On return, the application may
- * adjust the decompression parameters and then call jpeg_start_decompress.
- * (Or, if the application only wanted to determine the image parameters,
- * the data need not be decompressed.  In that case, call jpeg_abort or
- * jpeg_destroy to release any temporary space.)
- * If an abbreviated (tables only) datastream is presented, the routine will
- * return JPEG_HEADER_TABLES_ONLY upon reaching EOI.  The application may then
- * re-use the JPEG object to read the abbreviated image datastream(s).
- * It is unnecessary (but OK) to call jpeg_abort in this case.
- * The JPEG_SUSPENDED return code only occurs if the data source module
- * requests suspension of the decompressor.  In this case the application
- * should load more source data and then re-call jpeg_read_header to resume
- * processing.
- * If a non-suspending data source is used and require_image is TRUE, then the
- * return code need not be inspected since only JPEG_HEADER_OK is possible.
- *
- * This routine is now just a front end to jpeg_consume_input, with some
- * extra error checking.
- */
-
-GLOBAL(int)
-jpeg_read_header (j_decompress_ptr cinfo, boolean require_image)
-{
-  int retcode;
-
-  if (cinfo->global_state != DSTATE_START &&
-      cinfo->global_state != DSTATE_INHEADER)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-
-  retcode = jpeg_consume_input(cinfo);
-
-  switch (retcode) {
-  case JPEG_REACHED_SOS:
-    retcode = JPEG_HEADER_OK;
-    break;
-  case JPEG_REACHED_EOI:
-    if (require_image)		/* Complain if application wanted an image */
-      ERREXIT(cinfo, JERR_NO_IMAGE);
-    /* Reset to start state; it would be safer to require the application to
-     * call jpeg_abort, but we can't change it now for compatibility reasons.
-     * A side effect is to free any temporary memory (there shouldn't be any).
-     */
-    jpeg_abort((j_common_ptr) cinfo); /* sets state = DSTATE_START */
-    retcode = JPEG_HEADER_TABLES_ONLY;
-    break;
-  case JPEG_SUSPENDED:
-    /* no work */
-    break;
-  }
-
-  return retcode;
-}
-
-
-/*
- * Consume data in advance of what the decompressor requires.
- * This can be called at any time once the decompressor object has
- * been created and a data source has been set up.
- *
- * This routine is essentially a state machine that handles a couple
- * of critical state-transition actions, namely initial setup and
- * transition from header scanning to ready-for-start_decompress.
- * All the actual input is done via the input controller's consume_input
- * method.
- */
-
-GLOBAL(int)
-jpeg_consume_input (j_decompress_ptr cinfo)
-{
-  int retcode = JPEG_SUSPENDED;
-
-  /* NB: every possible DSTATE value should be listed in this switch */
-  switch (cinfo->global_state) {
-  case DSTATE_START:
-    /* Start-of-datastream actions: reset appropriate modules */
-    (*cinfo->inputctl->reset_input_controller) (cinfo);
-    /* Initialize application's data source module */
-    (*cinfo->src->init_source) (cinfo);
-    cinfo->global_state = DSTATE_INHEADER;
-    /*FALLTHROUGH*/
-  case DSTATE_INHEADER:
-    retcode = (*cinfo->inputctl->consume_input) (cinfo);
-    if (retcode == JPEG_REACHED_SOS) { /* Found SOS, prepare to decompress */
-      /* Set up default parameters based on header data */
-      default_decompress_parms(cinfo);
-      /* Set global state: ready for start_decompress */
-      cinfo->global_state = DSTATE_READY;
-    }
-    break;
-  case DSTATE_READY:
-    /* Can't advance past first SOS until start_decompress is called */
-    retcode = JPEG_REACHED_SOS;
-    break;
-  case DSTATE_PRELOAD:
-  case DSTATE_PRESCAN:
-  case DSTATE_SCANNING:
-  case DSTATE_RAW_OK:
-  case DSTATE_BUFIMAGE:
-  case DSTATE_BUFPOST:
-  case DSTATE_STOPPING:
-    retcode = (*cinfo->inputctl->consume_input) (cinfo);
-    break;
-  default:
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  }
-  return retcode;
-}
-
-
-/*
- * Have we finished reading the input file?
- */
-
-GLOBAL(boolean)
-jpeg_input_complete (j_decompress_ptr cinfo)
-{
-  /* Check for valid jpeg object */
-  if (cinfo->global_state < DSTATE_START ||
-      cinfo->global_state > DSTATE_STOPPING)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  return cinfo->inputctl->eoi_reached;
-}
-
-
-/*
- * Is there more than one scan?
- */
-
-GLOBAL(boolean)
-jpeg_has_multiple_scans (j_decompress_ptr cinfo)
-{
-  /* Only valid after jpeg_read_header completes */
-  if (cinfo->global_state < DSTATE_READY ||
-      cinfo->global_state > DSTATE_STOPPING)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  return cinfo->inputctl->has_multiple_scans;
-}
-
-
-/*
- * Finish JPEG decompression.
- *
- * This will normally just verify the file trailer and release temp storage.
- *
- * Returns FALSE if suspended.  The return value need be inspected only if
- * a suspending data source is used.
- */
-
-GLOBAL(boolean)
-jpeg_finish_decompress (j_decompress_ptr cinfo)
-{
-  if ((cinfo->global_state == DSTATE_SCANNING ||
-       cinfo->global_state == DSTATE_RAW_OK) && ! cinfo->buffered_image) {
-    /* Terminate final pass of non-buffered mode */
-    if (cinfo->output_scanline < cinfo->output_height)
-      ERREXIT(cinfo, JERR_TOO_LITTLE_DATA);
-    (*cinfo->master->finish_output_pass) (cinfo);
-    cinfo->global_state = DSTATE_STOPPING;
-  } else if (cinfo->global_state == DSTATE_BUFIMAGE) {
-    /* Finishing after a buffered-image operation */
-    cinfo->global_state = DSTATE_STOPPING;
-  } else if (cinfo->global_state != DSTATE_STOPPING) {
-    /* STOPPING = repeat call after a suspension, anything else is error */
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  }
-  /* Read until EOI */
-  while (! cinfo->inputctl->eoi_reached) {
-    if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
-      return FALSE;		/* Suspend, come back later */
-  }
-  /* Do final cleanup */
-  (*cinfo->src->term_source) (cinfo);
-  /* We can use jpeg_abort to release memory and reset global_state */
-  jpeg_abort((j_common_ptr) cinfo);
-  return TRUE;
-}

cde/lib/DtHelp/jpeg/jdapistd.c

@@ -1,298 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdapistd.c /main/2 1996/05/09 03:46:26 drk $ */
-/*
- * jdapistd.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains application interface code for the decompression half
- * of the JPEG library.  These are the "standard" API routines that are
- * used in the normal full-decompression case.  They are not used by a
- * transcoding-only application.  Note that if an application links in
- * jpeg_start_decompress, it will end up linking in the entire decompressor.
- * We thus must separate this file from jdapimin.c to avoid linking the
- * whole decompression library into a transcoder.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Forward declarations */
-LOCAL(boolean) output_pass_setup JPP((j_decompress_ptr cinfo));
-
-
-/*
- * Decompression initialization.
- * jpeg_read_header must be completed before calling this.
- *
- * If a multipass operating mode was selected, this will do all but the
- * last pass, and thus may take a great deal of time.
- *
- * Returns FALSE if suspended.  The return value need be inspected only if
- * a suspending data source is used.
- */
-
-GLOBAL(boolean)
-jpeg_start_decompress (j_decompress_ptr cinfo)
-{
-  if (cinfo->global_state == DSTATE_READY) {
-    /* First call: initialize master control, select active modules */
-    jinit_master_decompress(cinfo);
-    if (cinfo->buffered_image) {
-      /* No more work here; expecting jpeg_start_output next */
-      cinfo->global_state = DSTATE_BUFIMAGE;
-      return TRUE;
-    }
-    cinfo->global_state = DSTATE_PRELOAD;
-  }
-  if (cinfo->global_state == DSTATE_PRELOAD) {
-    /* If file has multiple scans, absorb them all into the coef buffer */
-    if (cinfo->inputctl->has_multiple_scans) {
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-      for (;;) {
-	int retcode;
-	/* Call progress monitor hook if present */
-	if (cinfo->progress != NULL)
-	  (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-	/* Absorb some more input */
-	retcode = (*cinfo->inputctl->consume_input) (cinfo);
-	if (retcode == JPEG_SUSPENDED)
-	  return FALSE;
-	if (retcode == JPEG_REACHED_EOI)
-	  break;
-	/* Advance progress counter if appropriate */
-	if (cinfo->progress != NULL &&
-	    (retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
-	  if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
-	    /* jdmaster underestimated number of scans; ratchet up one scan */
-	    cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
-	  }
-	}
-      }
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif /* D_MULTISCAN_FILES_SUPPORTED */
-    }
-    cinfo->output_scan_number = cinfo->input_scan_number;
-  } else if (cinfo->global_state != DSTATE_PRESCAN)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  /* Perform any dummy output passes, and set up for the final pass */
-  return output_pass_setup(cinfo);
-}
-
-
-/*
- * Set up for an output pass, and perform any dummy pass(es) needed.
- * Common subroutine for jpeg_start_decompress and jpeg_start_output.
- * Entry: global_state = DSTATE_PRESCAN only if previously suspended.
- * Exit: If done, returns TRUE and sets global_state for proper output mode.
- *       If suspended, returns FALSE and sets global_state = DSTATE_PRESCAN.
- */
-
-LOCAL(boolean)
-output_pass_setup (j_decompress_ptr cinfo)
-{
-  if (cinfo->global_state != DSTATE_PRESCAN) {
-    /* First call: do pass setup */
-    (*cinfo->master->prepare_for_output_pass) (cinfo);
-    cinfo->output_scanline = 0;
-    cinfo->global_state = DSTATE_PRESCAN;
-  }
-  /* Loop over any required dummy passes */
-  while (cinfo->master->is_dummy_pass) {
-#ifdef QUANT_2PASS_SUPPORTED
-    /* Crank through the dummy pass */
-    while (cinfo->output_scanline < cinfo->output_height) {
-      JDIMENSION last_scanline;
-      /* Call progress monitor hook if present */
-      if (cinfo->progress != NULL) {
-	cinfo->progress->pass_counter = (long) cinfo->output_scanline;
-	cinfo->progress->pass_limit = (long) cinfo->output_height;
-	(*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-      }
-      /* Process some data */
-      last_scanline = cinfo->output_scanline;
-      (*cinfo->main->process_data) (cinfo, (JSAMPARRAY) NULL,
-				    &cinfo->output_scanline, (JDIMENSION) 0);
-      if (cinfo->output_scanline == last_scanline)
-	return FALSE;		/* No progress made, must suspend */
-    }
-    /* Finish up dummy pass, and set up for another one */
-    (*cinfo->master->finish_output_pass) (cinfo);
-    (*cinfo->master->prepare_for_output_pass) (cinfo);
-    cinfo->output_scanline = 0;
-#else
-    ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif /* QUANT_2PASS_SUPPORTED */
-  }
-  /* Ready for application to drive output pass through
-   * jpeg_read_scanlines or jpeg_read_raw_data.
-   */
-  cinfo->global_state = cinfo->raw_data_out ? DSTATE_RAW_OK : DSTATE_SCANNING;
-  return TRUE;
-}
-
-
-/*
- * Read some scanlines of data from the JPEG decompressor.
- *
- * The return value will be the number of lines actually read.
- * This may be less than the number requested in several cases,
- * including bottom of image, data source suspension, and operating
- * modes that emit multiple scanlines at a time.
- *
- * Note: we warn about excess calls to jpeg_read_scanlines() since
- * this likely signals an application programmer error.  However,
- * an oversize buffer (max_lines > scanlines remaining) is not an error.
- */
-
-GLOBAL(JDIMENSION)
-jpeg_read_scanlines (j_decompress_ptr cinfo, JSAMPARRAY scanlines,
-		     JDIMENSION max_lines)
-{
-  JDIMENSION row_ctr;
-
-  if (cinfo->global_state != DSTATE_SCANNING)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  if (cinfo->output_scanline >= cinfo->output_height) {
-    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
-    return 0;
-  }
-
-  /* Call progress monitor hook if present */
-  if (cinfo->progress != NULL) {
-    cinfo->progress->pass_counter = (long) cinfo->output_scanline;
-    cinfo->progress->pass_limit = (long) cinfo->output_height;
-    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-  }
-
-  /* Process some data */
-  row_ctr = 0;
-  (*cinfo->main->process_data) (cinfo, scanlines, &row_ctr, max_lines);
-  cinfo->output_scanline += row_ctr;
-  return row_ctr;
-}
-
-
-/*
- * Alternate entry point to read raw data.
- * Processes exactly one iMCU row per call, unless suspended.
- */
-
-GLOBAL(JDIMENSION)
-jpeg_read_raw_data (j_decompress_ptr cinfo, JSAMPIMAGE data,
-		    JDIMENSION max_lines)
-{
-  JDIMENSION lines_per_iMCU_row;
-
-  if (cinfo->global_state != DSTATE_RAW_OK)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  if (cinfo->output_scanline >= cinfo->output_height) {
-    WARNMS(cinfo, JWRN_TOO_MUCH_DATA);
-    return 0;
-  }
-
-  /* Call progress monitor hook if present */
-  if (cinfo->progress != NULL) {
-    cinfo->progress->pass_counter = (long) cinfo->output_scanline;
-    cinfo->progress->pass_limit = (long) cinfo->output_height;
-    (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-  }
-
-  /* Verify that at least one iMCU row can be returned. */
-  lines_per_iMCU_row = cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size;
-  if (max_lines < lines_per_iMCU_row)
-    ERREXIT(cinfo, JERR_BUFFER_SIZE);
-
-  /* Decompress directly into user's buffer. */
-  if (! (*cinfo->coef->decompress_data) (cinfo, data))
-    return 0;			/* suspension forced, can do nothing more */
-
-  /* OK, we processed one iMCU row. */
-  cinfo->output_scanline += lines_per_iMCU_row;
-  return lines_per_iMCU_row;
-}
-
-
-/* Additional entry points for buffered-image mode. */
-
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-
-/*
- * Initialize for an output pass in buffered-image mode.
- */
-
-GLOBAL(boolean)
-jpeg_start_output (j_decompress_ptr cinfo, int scan_number)
-{
-  if (cinfo->global_state != DSTATE_BUFIMAGE &&
-      cinfo->global_state != DSTATE_PRESCAN)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  /* Limit scan number to valid range */
-  if (scan_number <= 0)
-    scan_number = 1;
-  if (cinfo->inputctl->eoi_reached &&
-      scan_number > cinfo->input_scan_number)
-    scan_number = cinfo->input_scan_number;
-  cinfo->output_scan_number = scan_number;
-  /* Perform any dummy output passes, and set up for the real pass */
-  return output_pass_setup(cinfo);
-}
-
-
-/*
- * Finish up after an output pass in buffered-image mode.
- *
- * Returns FALSE if suspended.  The return value need be inspected only if
- * a suspending data source is used.
- */
-
-GLOBAL(boolean)
-jpeg_finish_output (j_decompress_ptr cinfo)
-{
-  if ((cinfo->global_state == DSTATE_SCANNING ||
-       cinfo->global_state == DSTATE_RAW_OK) && cinfo->buffered_image) {
-    /* Terminate this pass. */
-    /* We do not require the whole pass to have been completed. */
-    (*cinfo->master->finish_output_pass) (cinfo);
-    cinfo->global_state = DSTATE_BUFPOST;
-  } else if (cinfo->global_state != DSTATE_BUFPOST) {
-    /* BUFPOST = repeat call after a suspension, anything else is error */
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  }
-  /* Read markers looking for SOS or EOI */
-  while (cinfo->input_scan_number <= cinfo->output_scan_number &&
-	 ! cinfo->inputctl->eoi_reached) {
-    if ((*cinfo->inputctl->consume_input) (cinfo) == JPEG_SUSPENDED)
-      return FALSE;		/* Suspend, come back later */
-  }
-  cinfo->global_state = DSTATE_BUFIMAGE;
-  return TRUE;
-}
-
-#endif /* D_MULTISCAN_FILES_SUPPORTED */

cde/lib/DtHelp/jpeg/jdatasrc.c

@@ -1,235 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdatasrc.c /main/2 1996/05/09 03:46:40 drk $ */
-/*
- * jdatasrc.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains decompression data source routines for the case of
- * reading JPEG data from a file (or any stdio stream).  While these routines
- * are sufficient for most applications, some will want to use a different
- * source manager.
- * IMPORTANT: we assume that fread() will correctly transcribe an array of
- * JOCTETs from 8-bit-wide elements on external storage.  If char is wider
- * than 8 bits on your machine, you may need to do some tweaking.
- */
-
-/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jerror.h"
-
-
-/* Expanded data source object for stdio input */
-
-typedef struct {
-  struct jpeg_source_mgr pub;	/* public fields */
-
-  FILE * infile;		/* source stream */
-  JOCTET * buffer;		/* start of buffer */
-  boolean start_of_file;	/* have we gotten any data yet? */
-} my_source_mgr;
-
-typedef my_source_mgr * my_src_ptr;
-
-#define INPUT_BUF_SIZE  4096	/* choose an efficiently fread'able size */
-
-
-/*
- * Initialize source --- called by jpeg_read_header
- * before any data is actually read.
- */
-
-METHODDEF(void)
-init_source (j_decompress_ptr cinfo)
-{
-  my_src_ptr src = (my_src_ptr) cinfo->src;
-
-  /* We reset the empty-input-file flag for each image,
-   * but we don't clear the input buffer.
-   * This is correct behavior for reading a series of images from one source.
-   */
-  src->start_of_file = TRUE;
-}
-
-
-/*
- * Fill the input buffer --- called whenever buffer is emptied.
- *
- * In typical applications, this should read fresh data into the buffer
- * (ignoring the current state of next_input_byte & bytes_in_buffer),
- * reset the pointer & count to the start of the buffer, and return TRUE
- * indicating that the buffer has been reloaded.  It is not necessary to
- * fill the buffer entirely, only to obtain at least one more byte.
- *
- * There is no such thing as an EOF return.  If the end of the file has been
- * reached, the routine has a choice of ERREXIT() or inserting fake data into
- * the buffer.  In most cases, generating a warning message and inserting a
- * fake EOI marker is the best course of action --- this will allow the
- * decompressor to output however much of the image is there.  However,
- * the resulting error message is misleading if the real problem is an empty
- * input file, so we handle that case specially.
- *
- * In applications that need to be able to suspend compression due to input
- * not being available yet, a FALSE return indicates that no more data can be
- * obtained right now, but more may be forthcoming later.  In this situation,
- * the decompressor will return to its caller (with an indication of the
- * number of scanlines it has read, if any).  The application should resume
- * decompression after it has loaded more data into the input buffer.  Note
- * that there are substantial restrictions on the use of suspension --- see
- * the documentation.
- *
- * When suspending, the decompressor will back up to a convenient restart point
- * (typically the start of the current MCU). next_input_byte & bytes_in_buffer
- * indicate where the restart point will be if the current call returns FALSE.
- * Data beyond this point must be rescanned after resumption, so move it to
- * the front of the buffer rather than discarding it.
- */
-
-METHODDEF(boolean)
-fill_input_buffer (j_decompress_ptr cinfo)
-{
-  my_src_ptr src = (my_src_ptr) cinfo->src;
-  size_t nbytes;
-
-  nbytes = JFREAD(src->infile, src->buffer, INPUT_BUF_SIZE);
-
-  if (nbytes <= 0) {
-    if (src->start_of_file)	/* Treat empty input file as fatal error */
-      ERREXIT(cinfo, JERR_INPUT_EMPTY);
-    WARNMS(cinfo, JWRN_JPEG_EOF);
-    /* Insert a fake EOI marker */
-    src->buffer[0] = (JOCTET) 0xFF;
-    src->buffer[1] = (JOCTET) JPEG_EOI;
-    nbytes = 2;
-  }
-
-  src->pub.next_input_byte = src->buffer;
-  src->pub.bytes_in_buffer = nbytes;
-  src->start_of_file = FALSE;
-
-  return TRUE;
-}
-
-
-/*
- * Skip data --- used to skip over a potentially large amount of
- * uninteresting data (such as an APPn marker).
- *
- * Writers of suspendable-input applications must note that skip_input_data
- * is not granted the right to give a suspension return.  If the skip extends
- * beyond the data currently in the buffer, the buffer can be marked empty so
- * that the next read will cause a fill_input_buffer call that can suspend.
- * Arranging for additional bytes to be discarded before reloading the input
- * buffer is the application writer's problem.
- */
-
-METHODDEF(void)
-skip_input_data (j_decompress_ptr cinfo, long num_bytes)
-{
-  my_src_ptr src = (my_src_ptr) cinfo->src;
-
-  /* Just a dumb implementation for now.  Could use fseek() except
-   * it doesn't work on pipes.  Not clear that being smart is worth
-   * any trouble anyway --- large skips are infrequent.
-   */
-  if (num_bytes > 0) {
-    while (num_bytes > (long) src->pub.bytes_in_buffer) {
-      num_bytes -= (long) src->pub.bytes_in_buffer;
-      (void) fill_input_buffer(cinfo);
-      /* note we assume that fill_input_buffer will never return FALSE,
-       * so suspension need not be handled.
-       */
-    }
-    src->pub.next_input_byte += (size_t) num_bytes;
-    src->pub.bytes_in_buffer -= (size_t) num_bytes;
-  }
-}
-
-
-/*
- * An additional method that can be provided by data source modules is the
- * resync_to_restart method for error recovery in the presence of RST markers.
- * For the moment, this source module just uses the default resync method
- * provided by the JPEG library.  That method assumes that no backtracking
- * is possible.
- */
-
-
-/*
- * Terminate source --- called by jpeg_finish_decompress
- * after all data has been read.  Often a no-op.
- *
- * NB: *not* called by jpeg_abort or jpeg_destroy; surrounding
- * application must deal with any cleanup that should happen even
- * for error exit.
- */
-
-METHODDEF(void)
-term_source (j_decompress_ptr cinfo)
-{
-  /* no work necessary here */
-}
-
-
-/*
- * Prepare for input from a stdio stream.
- * The caller must have already opened the stream, and is responsible
- * for closing it after finishing decompression.
- */
-
-GLOBAL(void)
-jpeg_stdio_src (j_decompress_ptr cinfo, FILE * infile)
-{
-  my_src_ptr src;
-
-  /* The source object and input buffer are made permanent so that a series
-   * of JPEG images can be read from the same file by calling jpeg_stdio_src
-   * only before the first one.  (If we discarded the buffer at the end of
-   * one image, we'd likely lose the start of the next one.)
-   * This makes it unsafe to use this manager and a different source
-   * manager serially with the same JPEG object.  Caveat programmer.
-   */
-  if (cinfo->src == NULL) {	/* first time for this JPEG object? */
-    cinfo->src = (struct jpeg_source_mgr *)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				  SIZEOF(my_source_mgr));
-    src = (my_src_ptr) cinfo->src;
-    src->buffer = (JOCTET *)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				  INPUT_BUF_SIZE * SIZEOF(JOCTET));
-  }
-
-  src = (my_src_ptr) cinfo->src;
-  src->pub.init_source = init_source;
-  src->pub.fill_input_buffer = fill_input_buffer;
-  src->pub.skip_input_data = skip_input_data;
-  src->pub.resync_to_restart = jpeg_resync_to_restart; /* use default method */
-  src->pub.term_source = term_source;
-  src->infile = infile;
-  src->pub.bytes_in_buffer = 0; /* forces fill_input_buffer on first read */
-  src->pub.next_input_byte = NULL; /* until buffer loaded */
-}

cde/lib/DtHelp/jpeg/jdcoefct.c

@@ -1,758 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdcoefct.c /main/2 1996/05/09 03:46:54 drk $ */
-/*
- * jdcoefct.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains the coefficient buffer controller for decompression.
- * This controller is the top level of the JPEG decompressor proper.
- * The coefficient buffer lies between entropy decoding and inverse-DCT steps.
- *
- * In buffered-image mode, this controller is the interface between
- * input-oriented processing and output-oriented processing.
- * Also, the input side (only) is used when reading a file for transcoding.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-/* Block smoothing is only applicable for progressive JPEG, so: */
-#ifndef D_PROGRESSIVE_SUPPORTED
-#undef BLOCK_SMOOTHING_SUPPORTED
-#endif
-
-/* Private buffer controller object */
-
-typedef struct {
-  struct jpeg_d_coef_controller pub; /* public fields */
-
-  /* These variables keep track of the current location of the input side. */
-  /* cinfo->input_iMCU_row is also used for this. */
-  JDIMENSION MCU_ctr;		/* counts MCUs processed in current row */
-  int MCU_vert_offset;		/* counts MCU rows within iMCU row */
-  int MCU_rows_per_iMCU_row;	/* number of such rows needed */
-
-  /* The output side's location is represented by cinfo->output_iMCU_row. */
-
-  /* In single-pass modes, it's sufficient to buffer just one MCU.
-   * We allocate a workspace of D_MAX_BLOCKS_IN_MCU coefficient blocks,
-   * and let the entropy decoder write into that workspace each time.
-   * (On 80x86, the workspace is FAR even though it's not really very big;
-   * this is to keep the module interfaces unchanged when a large coefficient
-   * buffer is necessary.)
-   * In multi-pass modes, this array points to the current MCU's blocks
-   * within the virtual arrays; it is used only by the input side.
-   */
-  JBLOCKROW MCU_buffer[D_MAX_BLOCKS_IN_MCU];
-
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-  /* In multi-pass modes, we need a virtual block array for each component. */
-  jvirt_barray_ptr whole_image[MAX_COMPONENTS];
-#endif
-
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-  /* When doing block smoothing, we latch coefficient Al values here */
-  int * coef_bits_latch;
-#define SAVED_COEFS  6		/* we save coef_bits[0..5] */
-#endif
-} my_coef_controller;
-
-typedef my_coef_controller * my_coef_ptr;
-
-/* Forward declarations */
-METHODDEF(int) decompress_onepass
-	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-METHODDEF(int) decompress_data
-	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
-#endif
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-LOCAL(boolean) smoothing_ok JPP((j_decompress_ptr cinfo));
-METHODDEF(int) decompress_smooth_data
-	JPP((j_decompress_ptr cinfo, JSAMPIMAGE output_buf));
-#endif
-
-
-LOCAL(void)
-start_iMCU_row (j_decompress_ptr cinfo)
-/* Reset within-iMCU-row counters for a new row (input side) */
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-
-  /* In an interleaved scan, an MCU row is the same as an iMCU row.
-   * In a noninterleaved scan, an iMCU row has v_samp_factor MCU rows.
-   * But at the bottom of the image, process only what's left.
-   */
-  if (cinfo->comps_in_scan > 1) {
-    coef->MCU_rows_per_iMCU_row = 1;
-  } else {
-    if (cinfo->input_iMCU_row < (cinfo->total_iMCU_rows-1))
-      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->v_samp_factor;
-    else
-      coef->MCU_rows_per_iMCU_row = cinfo->cur_comp_info[0]->last_row_height;
-  }
-
-  coef->MCU_ctr = 0;
-  coef->MCU_vert_offset = 0;
-}
-
-
-/*
- * Initialize for an input processing pass.
- */
-
-METHODDEF(void)
-start_input_pass (j_decompress_ptr cinfo)
-{
-  cinfo->input_iMCU_row = 0;
-  start_iMCU_row(cinfo);
-}
-
-
-/*
- * Initialize for an output processing pass.
- */
-
-METHODDEF(void)
-start_output_pass (j_decompress_ptr cinfo)
-{
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-
-  /* If multipass, check to see whether to use block smoothing on this pass */
-  if (coef->pub.coef_arrays != NULL) {
-    if (cinfo->do_block_smoothing && smoothing_ok(cinfo))
-      coef->pub.decompress_data = decompress_smooth_data;
-    else
-      coef->pub.decompress_data = decompress_data;
-  }
-#endif
-  cinfo->output_iMCU_row = 0;
-}
-
-
-/*
- * Decompress and return some data in the single-pass case.
- * Always attempts to emit one fully interleaved MCU row ("iMCU" row).
- * Input and output must run in lockstep since we have only a one-MCU buffer.
- * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
- *
- * NB: output_buf contains a plane for each component in image.
- * For single pass, this is the same as the components in the scan.
- */
-
-METHODDEF(int)
-decompress_onepass (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-  JDIMENSION MCU_col_num;	/* index of current MCU within row */
-  JDIMENSION last_MCU_col = cinfo->MCUs_per_row - 1;
-  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
-  int blkn, ci, xindex, yindex, yoffset, useful_width;
-  JSAMPARRAY output_ptr;
-  JDIMENSION start_col, output_col;
-  jpeg_component_info *compptr;
-  inverse_DCT_method_ptr inverse_DCT;
-
-  /* Loop to process as much as one whole iMCU row */
-  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
-       yoffset++) {
-    for (MCU_col_num = coef->MCU_ctr; MCU_col_num <= last_MCU_col;
-	 MCU_col_num++) {
-      /* Try to fetch an MCU.  Entropy decoder expects buffer to be zeroed. */
-      jzero_far((void FAR *) coef->MCU_buffer[0],
-		(size_t) (cinfo->blocks_in_MCU * SIZEOF(JBLOCK)));
-      if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) {
-	/* Suspension forced; update state counters and exit */
-	coef->MCU_vert_offset = yoffset;
-	coef->MCU_ctr = MCU_col_num;
-	return JPEG_SUSPENDED;
-      }
-      /* Determine where data should go in output_buf and do the IDCT thing.
-       * We skip dummy blocks at the right and bottom edges (but blkn gets
-       * incremented past them!).  Note the inner loop relies on having
-       * allocated the MCU_buffer[] blocks sequentially.
-       */
-      blkn = 0;			/* index of current DCT block within MCU */
-      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-	compptr = cinfo->cur_comp_info[ci];
-	/* Don't bother to IDCT an uninteresting component. */
-	if (! compptr->component_needed) {
-	  blkn += compptr->MCU_blocks;
-	  continue;
-	}
-	inverse_DCT = cinfo->idct->inverse_DCT[compptr->component_index];
-	useful_width = (MCU_col_num < last_MCU_col) ? compptr->MCU_width
-						    : compptr->last_col_width;
-	output_ptr = output_buf[ci] + yoffset * compptr->DCT_scaled_size;
-	start_col = MCU_col_num * compptr->MCU_sample_width;
-	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
-	  if (cinfo->input_iMCU_row < last_iMCU_row ||
-	      yoffset+yindex < compptr->last_row_height) {
-	    output_col = start_col;
-	    for (xindex = 0; xindex < useful_width; xindex++) {
-	      (*inverse_DCT) (cinfo, compptr,
-			      (JCOEFPTR) coef->MCU_buffer[blkn+xindex],
-			      output_ptr, output_col);
-	      output_col += compptr->DCT_scaled_size;
-	    }
-	  }
-	  blkn += compptr->MCU_width;
-	  output_ptr += compptr->DCT_scaled_size;
-	}
-      }
-    }
-    /* Completed an MCU row, but perhaps not an iMCU row */
-    coef->MCU_ctr = 0;
-  }
-  /* Completed the iMCU row, advance counters for next one */
-  cinfo->output_iMCU_row++;
-  if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) {
-    start_iMCU_row(cinfo);
-    return JPEG_ROW_COMPLETED;
-  }
-  /* Completed the scan */
-  (*cinfo->inputctl->finish_input_pass) (cinfo);
-  return JPEG_SCAN_COMPLETED;
-}
-
-
-/*
- * Dummy consume-input routine for single-pass operation.
- */
-
-METHODDEF(int)
-dummy_consume_data (j_decompress_ptr cinfo)
-{
-  return JPEG_SUSPENDED;	/* Always indicate nothing was done */
-}
-
-
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-
-/*
- * Consume input data and store it in the full-image coefficient buffer.
- * We read as much as one fully interleaved MCU row ("iMCU" row) per call,
- * ie, v_samp_factor block rows for each component in the scan.
- * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
- */
-
-METHODDEF(int)
-consume_data (j_decompress_ptr cinfo)
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-  JDIMENSION MCU_col_num;	/* index of current MCU within row */
-  int blkn, ci, xindex, yindex, yoffset;
-  JDIMENSION start_col;
-  JBLOCKARRAY buffer[MAX_COMPS_IN_SCAN];
-  JBLOCKROW buffer_ptr;
-  jpeg_component_info *compptr;
-
-  /* Align the virtual buffers for the components used in this scan. */
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-    compptr = cinfo->cur_comp_info[ci];
-    buffer[ci] = (*cinfo->mem->access_virt_barray)
-      ((j_common_ptr) cinfo, coef->whole_image[compptr->component_index],
-       cinfo->input_iMCU_row * compptr->v_samp_factor,
-       (JDIMENSION) compptr->v_samp_factor, TRUE);
-    /* Note: entropy decoder expects buffer to be zeroed,
-     * but this is handled automatically by the memory manager
-     * because we requested a pre-zeroed array.
-     */
-  }
-
-  /* Loop to process one whole iMCU row */
-  for (yoffset = coef->MCU_vert_offset; yoffset < coef->MCU_rows_per_iMCU_row;
-       yoffset++) {
-    for (MCU_col_num = coef->MCU_ctr; MCU_col_num < cinfo->MCUs_per_row;
-	 MCU_col_num++) {
-      /* Construct list of pointers to DCT blocks belonging to this MCU */
-      blkn = 0;			/* index of current DCT block within MCU */
-      for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-	compptr = cinfo->cur_comp_info[ci];
-	start_col = MCU_col_num * compptr->MCU_width;
-	for (yindex = 0; yindex < compptr->MCU_height; yindex++) {
-	  buffer_ptr = buffer[ci][yindex+yoffset] + start_col;
-	  for (xindex = 0; xindex < compptr->MCU_width; xindex++) {
-	    coef->MCU_buffer[blkn++] = buffer_ptr++;
-	  }
-	}
-      }
-      /* Try to fetch the MCU. */
-      if (! (*cinfo->entropy->decode_mcu) (cinfo, coef->MCU_buffer)) {
-	/* Suspension forced; update state counters and exit */
-	coef->MCU_vert_offset = yoffset;
-	coef->MCU_ctr = MCU_col_num;
-	return JPEG_SUSPENDED;
-      }
-    }
-    /* Completed an MCU row, but perhaps not an iMCU row */
-    coef->MCU_ctr = 0;
-  }
-  /* Completed the iMCU row, advance counters for next one */
-  if (++(cinfo->input_iMCU_row) < cinfo->total_iMCU_rows) {
-    start_iMCU_row(cinfo);
-    return JPEG_ROW_COMPLETED;
-  }
-  /* Completed the scan */
-  (*cinfo->inputctl->finish_input_pass) (cinfo);
-  return JPEG_SCAN_COMPLETED;
-}
-
-
-/*
- * Decompress and return some data in the multi-pass case.
- * Always attempts to emit one fully interleaved MCU row ("iMCU" row).
- * Return value is JPEG_ROW_COMPLETED, JPEG_SCAN_COMPLETED, or JPEG_SUSPENDED.
- *
- * NB: output_buf contains a plane for each component in image.
- */
-
-METHODDEF(int)
-decompress_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
-  JDIMENSION block_num;
-  int ci, block_row, block_rows;
-  JBLOCKARRAY buffer;
-  JBLOCKROW buffer_ptr;
-  JSAMPARRAY output_ptr;
-  JDIMENSION output_col;
-  jpeg_component_info *compptr;
-  inverse_DCT_method_ptr inverse_DCT;
-
-  /* Force some input to be done if we are getting ahead of the input. */
-  while (cinfo->input_scan_number < cinfo->output_scan_number ||
-	 (cinfo->input_scan_number == cinfo->output_scan_number &&
-	  cinfo->input_iMCU_row <= cinfo->output_iMCU_row)) {
-    if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED)
-      return JPEG_SUSPENDED;
-  }
-
-  /* OK, output from the virtual arrays. */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Don't bother to IDCT an uninteresting component. */
-    if (! compptr->component_needed)
-      continue;
-    /* Align the virtual buffer for this component. */
-    buffer = (*cinfo->mem->access_virt_barray)
-      ((j_common_ptr) cinfo, coef->whole_image[ci],
-       cinfo->output_iMCU_row * compptr->v_samp_factor,
-       (JDIMENSION) compptr->v_samp_factor, FALSE);
-    /* Count non-dummy DCT block rows in this iMCU row. */
-    if (cinfo->output_iMCU_row < last_iMCU_row)
-      block_rows = compptr->v_samp_factor;
-    else {
-      /* NB: can't use last_row_height here; it is input-side-dependent! */
-      block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
-      if (block_rows == 0) block_rows = compptr->v_samp_factor;
-    }
-    inverse_DCT = cinfo->idct->inverse_DCT[ci];
-    output_ptr = output_buf[ci];
-    /* Loop over all DCT blocks to be processed. */
-    for (block_row = 0; block_row < block_rows; block_row++) {
-      buffer_ptr = buffer[block_row];
-      output_col = 0;
-      for (block_num = 0; block_num < compptr->width_in_blocks; block_num++) {
-	(*inverse_DCT) (cinfo, compptr, (JCOEFPTR) buffer_ptr,
-			output_ptr, output_col);
-	buffer_ptr++;
-	output_col += compptr->DCT_scaled_size;
-      }
-      output_ptr += compptr->DCT_scaled_size;
-    }
-  }
-
-  if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows)
-    return JPEG_ROW_COMPLETED;
-  return JPEG_SCAN_COMPLETED;
-}
-
-#endif /* D_MULTISCAN_FILES_SUPPORTED */
-
-
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-
-/*
- * This code applies interblock smoothing as described by section K.8
- * of the JPEG standard: the first 5 AC coefficients are estimated from
- * the DC values of a DCT block and its 8 neighboring blocks.
- * We apply smoothing only for progressive JPEG decoding, and only if
- * the coefficients it can estimate are not yet known to full precision.
- */
-
-/* Natural-order array positions of the first 5 zigzag-order coefficients */
-#define Q01_POS  1
-#define Q10_POS  8
-#define Q20_POS  16
-#define Q11_POS  9
-#define Q02_POS  2
-
-/*
- * Determine whether block smoothing is applicable and safe.
- * We also latch the current states of the coef_bits[] entries for the
- * AC coefficients; otherwise, if the input side of the decompressor
- * advances into a new scan, we might think the coefficients are known
- * more accurately than they really are.
- */
-
-LOCAL(boolean)
-smoothing_ok (j_decompress_ptr cinfo)
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-  boolean smoothing_useful = FALSE;
-  int ci, coefi;
-  jpeg_component_info *compptr;
-  JQUANT_TBL * qtable;
-  int * coef_bits;
-  int * coef_bits_latch;
-
-  if (! cinfo->progressive_mode || cinfo->coef_bits == NULL)
-    return FALSE;
-
-  /* Allocate latch area if not already done */
-  if (coef->coef_bits_latch == NULL)
-    coef->coef_bits_latch = (int *)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  cinfo->num_components *
-				  (SAVED_COEFS * SIZEOF(int)));
-  coef_bits_latch = coef->coef_bits_latch;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* All components' quantization values must already be latched. */
-    if ((qtable = compptr->quant_table) == NULL)
-      return FALSE;
-    /* Verify DC & first 5 AC quantizers are nonzero to avoid zero-divide. */
-    if (qtable->quantval[0] == 0 ||
-	qtable->quantval[Q01_POS] == 0 ||
-	qtable->quantval[Q10_POS] == 0 ||
-	qtable->quantval[Q20_POS] == 0 ||
-	qtable->quantval[Q11_POS] == 0 ||
-	qtable->quantval[Q02_POS] == 0)
-      return FALSE;
-    /* DC values must be at least partly known for all components. */
-    coef_bits = cinfo->coef_bits[ci];
-    if (coef_bits[0] < 0)
-      return FALSE;
-    /* Block smoothing is helpful if some AC coefficients remain inaccurate. */
-    for (coefi = 1; coefi <= 5; coefi++) {
-      coef_bits_latch[coefi] = coef_bits[coefi];
-      if (coef_bits[coefi] != 0)
-	smoothing_useful = TRUE;
-    }
-    coef_bits_latch += SAVED_COEFS;
-  }
-
-  return smoothing_useful;
-}
-
-
-/*
- * Variant of decompress_data for use when doing block smoothing.
- */
-
-METHODDEF(int)
-decompress_smooth_data (j_decompress_ptr cinfo, JSAMPIMAGE output_buf)
-{
-  my_coef_ptr coef = (my_coef_ptr) cinfo->coef;
-  JDIMENSION last_iMCU_row = cinfo->total_iMCU_rows - 1;
-  JDIMENSION block_num, last_block_column;
-  int ci, block_row, block_rows, access_rows;
-  JBLOCKARRAY buffer;
-  JBLOCKROW buffer_ptr, prev_block_row, next_block_row;
-  JSAMPARRAY output_ptr;
-  JDIMENSION output_col;
-  jpeg_component_info *compptr;
-  inverse_DCT_method_ptr inverse_DCT;
-  boolean first_row, last_row;
-  JBLOCK workspace;
-  int *coef_bits;
-  JQUANT_TBL *quanttbl;
-  INT32 Q00,Q01,Q02,Q10,Q11,Q20, num;
-  int DC1,DC2,DC3,DC4,DC5,DC6,DC7,DC8,DC9;
-  int Al, pred;
-
-  /* Force some input to be done if we are getting ahead of the input. */
-  while (cinfo->input_scan_number <= cinfo->output_scan_number &&
-	 ! cinfo->inputctl->eoi_reached) {
-    if (cinfo->input_scan_number == cinfo->output_scan_number) {
-      /* If input is working on current scan, we ordinarily want it to
-       * have completed the current row.  But if input scan is DC,
-       * we want it to keep one row ahead so that next block row's DC
-       * values are up to date.
-       */
-      JDIMENSION delta = (cinfo->Ss == 0) ? 1 : 0;
-      if (cinfo->input_iMCU_row > cinfo->output_iMCU_row+delta)
-	break;
-    }
-    if ((*cinfo->inputctl->consume_input)(cinfo) == JPEG_SUSPENDED)
-      return JPEG_SUSPENDED;
-  }
-
-  /* OK, output from the virtual arrays. */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Don't bother to IDCT an uninteresting component. */
-    if (! compptr->component_needed)
-      continue;
-    /* Count non-dummy DCT block rows in this iMCU row. */
-    if (cinfo->output_iMCU_row < last_iMCU_row) {
-      block_rows = compptr->v_samp_factor;
-      access_rows = block_rows * 2; /* this and next iMCU row */
-      last_row = FALSE;
-    } else {
-      /* NB: can't use last_row_height here; it is input-side-dependent! */
-      block_rows = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
-      if (block_rows == 0) block_rows = compptr->v_samp_factor;
-      access_rows = block_rows; /* this iMCU row only */
-      last_row = TRUE;
-    }
-    /* Align the virtual buffer for this component. */
-    if (cinfo->output_iMCU_row > 0) {
-      access_rows += compptr->v_samp_factor; /* prior iMCU row too */
-      buffer = (*cinfo->mem->access_virt_barray)
-	((j_common_ptr) cinfo, coef->whole_image[ci],
-	 (cinfo->output_iMCU_row - 1) * compptr->v_samp_factor,
-	 (JDIMENSION) access_rows, FALSE);
-      buffer += compptr->v_samp_factor;	/* point to current iMCU row */
-      first_row = FALSE;
-    } else {
-      buffer = (*cinfo->mem->access_virt_barray)
-	((j_common_ptr) cinfo, coef->whole_image[ci],
-	 (JDIMENSION) 0, (JDIMENSION) access_rows, FALSE);
-      first_row = TRUE;
-    }
-    /* Fetch component-dependent info */
-    coef_bits = coef->coef_bits_latch + (ci * SAVED_COEFS);
-    quanttbl = compptr->quant_table;
-    Q00 = quanttbl->quantval[0];
-    Q01 = quanttbl->quantval[Q01_POS];
-    Q10 = quanttbl->quantval[Q10_POS];
-    Q20 = quanttbl->quantval[Q20_POS];
-    Q11 = quanttbl->quantval[Q11_POS];
-    Q02 = quanttbl->quantval[Q02_POS];
-    inverse_DCT = cinfo->idct->inverse_DCT[ci];
-    output_ptr = output_buf[ci];
-    /* Loop over all DCT blocks to be processed. */
-    for (block_row = 0; block_row < block_rows; block_row++) {
-      buffer_ptr = buffer[block_row];
-      if (first_row && block_row == 0)
-	prev_block_row = buffer_ptr;
-      else
-	prev_block_row = buffer[block_row-1];
-      if (last_row && block_row == block_rows-1)
-	next_block_row = buffer_ptr;
-      else
-	next_block_row = buffer[block_row+1];
-      /* We fetch the surrounding DC values using a sliding-register approach.
-       * Initialize all nine here so as to do the right thing on narrow pics.
-       */
-      DC1 = DC2 = DC3 = (int) prev_block_row[0][0];
-      DC4 = DC5 = DC6 = (int) buffer_ptr[0][0];
-      DC7 = DC8 = DC9 = (int) next_block_row[0][0];
-      output_col = 0;
-      last_block_column = compptr->width_in_blocks - 1;
-      for (block_num = 0; block_num <= last_block_column; block_num++) {
-	/* Fetch current DCT block into workspace so we can modify it. */
-	jcopy_block_row(buffer_ptr, (JBLOCKROW) workspace, (JDIMENSION) 1);
-	/* Update DC values */
-	if (block_num < last_block_column) {
-	  DC3 = (int) prev_block_row[1][0];
-	  DC6 = (int) buffer_ptr[1][0];
-	  DC9 = (int) next_block_row[1][0];
-	}
-	/* Compute coefficient estimates per K.8.
-	 * An estimate is applied only if coefficient is still zero,
-	 * and is not known to be fully accurate.
-	 */
-	/* AC01 */
-	if ((Al=coef_bits[1]) != 0 && workspace[1] == 0) {
-	  num = 36 * Q00 * (DC4 - DC6);
-	  if (num >= 0) {
-	    pred = (int) (((Q01<<7) + num) / (Q01<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	  } else {
-	    pred = (int) (((Q01<<7) - num) / (Q01<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	    pred = -pred;
-	  }
-	  workspace[1] = (JCOEF) pred;
-	}
-	/* AC10 */
-	if ((Al=coef_bits[2]) != 0 && workspace[8] == 0) {
-	  num = 36 * Q00 * (DC2 - DC8);
-	  if (num >= 0) {
-	    pred = (int) (((Q10<<7) + num) / (Q10<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	  } else {
-	    pred = (int) (((Q10<<7) - num) / (Q10<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	    pred = -pred;
-	  }
-	  workspace[8] = (JCOEF) pred;
-	}
-	/* AC20 */
-	if ((Al=coef_bits[3]) != 0 && workspace[16] == 0) {
-	  num = 9 * Q00 * (DC2 + DC8 - 2*DC5);
-	  if (num >= 0) {
-	    pred = (int) (((Q20<<7) + num) / (Q20<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	  } else {
-	    pred = (int) (((Q20<<7) - num) / (Q20<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	    pred = -pred;
-	  }
-	  workspace[16] = (JCOEF) pred;
-	}
-	/* AC11 */
-	if ((Al=coef_bits[4]) != 0 && workspace[9] == 0) {
-	  num = 5 * Q00 * (DC1 - DC3 - DC7 + DC9);
-	  if (num >= 0) {
-	    pred = (int) (((Q11<<7) + num) / (Q11<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	  } else {
-	    pred = (int) (((Q11<<7) - num) / (Q11<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	    pred = -pred;
-	  }
-	  workspace[9] = (JCOEF) pred;
-	}
-	/* AC02 */
-	if ((Al=coef_bits[5]) != 0 && workspace[2] == 0) {
-	  num = 9 * Q00 * (DC4 + DC6 - 2*DC5);
-	  if (num >= 0) {
-	    pred = (int) (((Q02<<7) + num) / (Q02<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	  } else {
-	    pred = (int) (((Q02<<7) - num) / (Q02<<8));
-	    if (Al > 0 && pred >= (1<<Al))
-	      pred = (1<<Al)-1;
-	    pred = -pred;
-	  }
-	  workspace[2] = (JCOEF) pred;
-	}
-	/* OK, do the IDCT */
-	(*inverse_DCT) (cinfo, compptr, (JCOEFPTR) workspace,
-			output_ptr, output_col);
-	/* Advance for next column */
-	DC1 = DC2; DC2 = DC3;
-	DC4 = DC5; DC5 = DC6;
-	DC7 = DC8; DC8 = DC9;
-	buffer_ptr++, prev_block_row++, next_block_row++;
-	output_col += compptr->DCT_scaled_size;
-      }
-      output_ptr += compptr->DCT_scaled_size;
-    }
-  }
-
-  if (++(cinfo->output_iMCU_row) < cinfo->total_iMCU_rows)
-    return JPEG_ROW_COMPLETED;
-  return JPEG_SCAN_COMPLETED;
-}
-
-#endif /* BLOCK_SMOOTHING_SUPPORTED */
-
-
-/*
- * Initialize coefficient buffer controller.
- */
-
-GLOBAL(void)
-jinit_d_coef_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
-{
-  my_coef_ptr coef;
-
-  coef = (my_coef_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_coef_controller));
-  cinfo->coef = (struct jpeg_d_coef_controller *) coef;
-  coef->pub.start_input_pass = start_input_pass;
-  coef->pub.start_output_pass = start_output_pass;
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-  coef->coef_bits_latch = NULL;
-#endif
-
-  /* Create the coefficient buffer. */
-  if (need_full_buffer) {
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-    /* Allocate a full-image virtual array for each component, */
-    /* padded to a multiple of samp_factor DCT blocks in each direction. */
-    /* Note we ask for a pre-zeroed array. */
-    int ci, access_rows;
-    jpeg_component_info *compptr;
-
-    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-	 ci++, compptr++) {
-      access_rows = compptr->v_samp_factor;
-#ifdef BLOCK_SMOOTHING_SUPPORTED
-      /* If block smoothing could be used, need a bigger window */
-      if (cinfo->progressive_mode)
-	access_rows *= 3;
-#endif
-      coef->whole_image[ci] = (*cinfo->mem->request_virt_barray)
-	((j_common_ptr) cinfo, JPOOL_IMAGE, TRUE,
-	 (JDIMENSION) jround_up((long) compptr->width_in_blocks,
-				(long) compptr->h_samp_factor),
-	 (JDIMENSION) jround_up((long) compptr->height_in_blocks,
-				(long) compptr->v_samp_factor),
-	 (JDIMENSION) access_rows);
-    }
-    coef->pub.consume_data = consume_data;
-    coef->pub.decompress_data = decompress_data;
-    coef->pub.coef_arrays = coef->whole_image; /* link to virtual arrays */
-#else
-    ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-  } else {
-    /* We only need a single-MCU buffer. */
-    JBLOCKROW buffer;
-    int i;
-
-    buffer = (JBLOCKROW)
-      (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  D_MAX_BLOCKS_IN_MCU * SIZEOF(JBLOCK));
-    for (i = 0; i < D_MAX_BLOCKS_IN_MCU; i++) {
-      coef->MCU_buffer[i] = buffer + i;
-    }
-    coef->pub.consume_data = dummy_consume_data;
-    coef->pub.decompress_data = decompress_onepass;
-    coef->pub.coef_arrays = NULL; /* flag for no virtual arrays */
-  }
-}

cde/lib/DtHelp/jpeg/jdcolor.c

@@ -1,390 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdcolor.c /main/2 1996/05/09 03:47:07 drk $ */
-/*
- * jdcolor.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains output colorspace conversion routines.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Private subobject */
-
-typedef struct {
-  struct jpeg_color_deconverter pub; /* public fields */
-
-  /* Private state for YCC->RGB conversion */
-  int * Cr_r_tab;		/* => table for Cr to R conversion */
-  int * Cb_b_tab;		/* => table for Cb to B conversion */
-  INT32 * Cr_g_tab;		/* => table for Cr to G conversion */
-  INT32 * Cb_g_tab;		/* => table for Cb to G conversion */
-} my_color_deconverter;
-
-typedef my_color_deconverter * my_cconvert_ptr;
-
-
-/**************** YCbCr -> RGB conversion: most common case **************/
-
-/*
- * YCbCr is defined per CCIR 601-1, except that Cb and Cr are
- * normalized to the range 0..MAXJSAMPLE rather than -0.5 .. 0.5.
- * The conversion equations to be implemented are therefore
- *	R = Y                + 1.40200 * Cr
- *	G = Y - 0.34414 * Cb - 0.71414 * Cr
- *	B = Y + 1.77200 * Cb
- * where Cb and Cr represent the incoming values less CENTERJSAMPLE.
- * (These numbers are derived from TIFF 6.0 section 21, dated 3-June-92.)
- *
- * To avoid floating-point arithmetic, we represent the fractional constants
- * as integers scaled up by 2^16 (about 4 digits precision); we have to divide
- * the products by 2^16, with appropriate rounding, to get the correct answer.
- * Notice that Y, being an integral input, does not contribute any fraction
- * so it need not participate in the rounding.
- *
- * For even more speed, we avoid doing any multiplications in the inner loop
- * by precalculating the constants times Cb and Cr for all possible values.
- * For 8-bit JSAMPLEs this is very reasonable (only 256 entries per table);
- * for 12-bit samples it is still acceptable.  It's not very reasonable for
- * 16-bit samples, but if you want lossless storage you shouldn't be changing
- * colorspace anyway.
- * The Cr=>R and Cb=>B values can be rounded to integers in advance; the
- * values for the G calculation are left scaled up, since we must add them
- * together before rounding.
- */
-
-#define SCALEBITS	16	/* speediest right-shift on some machines */
-#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
-#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
-
-
-/*
- * Initialize tables for YCC->RGB colorspace conversion.
- */
-
-LOCAL(void)
-build_ycc_rgb_table (j_decompress_ptr cinfo)
-{
-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
-  int i;
-  INT32 x;
-  SHIFT_TEMPS
-
-  cconvert->Cr_r_tab = (int *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(int));
-  cconvert->Cb_b_tab = (int *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(int));
-  cconvert->Cr_g_tab = (INT32 *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(INT32));
-  cconvert->Cb_g_tab = (INT32 *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(INT32));
-
-  for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
-    /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
-    /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
-    /* Cr=>R value is nearest int to 1.40200 * x */
-    cconvert->Cr_r_tab[i] = (int)
-		    RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
-    /* Cb=>B value is nearest int to 1.77200 * x */
-    cconvert->Cb_b_tab[i] = (int)
-		    RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
-    /* Cr=>G value is scaled-up -0.71414 * x */
-    cconvert->Cr_g_tab[i] = (- FIX(0.71414)) * x;
-    /* Cb=>G value is scaled-up -0.34414 * x */
-    /* We also add in ONE_HALF so that need not do it in inner loop */
-    cconvert->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
-  }
-}
-
-
-/*
- * Convert some rows of samples to the output colorspace.
- *
- * Note that we change from noninterleaved, one-plane-per-component format
- * to interleaved-pixel format.  The output buffer is therefore three times
- * as wide as the input buffer.
- * A starting row offset is provided only for the input buffer.  The caller
- * can easily adjust the passed output_buf value to accommodate any row
- * offset required on that side.
- */
-
-METHODDEF(void)
-ycc_rgb_convert (j_decompress_ptr cinfo,
-		 JSAMPIMAGE input_buf, JDIMENSION input_row,
-		 JSAMPARRAY output_buf, int num_rows)
-{
-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
-  int y, cb, cr;
-  JSAMPROW outptr;
-  JSAMPROW inptr0, inptr1, inptr2;
-  JDIMENSION col;
-  JDIMENSION num_cols = cinfo->output_width;
-  /* copy these pointers into registers if possible */
-  JSAMPLE * range_limit = cinfo->sample_range_limit;
-  int * Crrtab = cconvert->Cr_r_tab;
-  int * Cbbtab = cconvert->Cb_b_tab;
-  INT32 * Crgtab = cconvert->Cr_g_tab;
-  INT32 * Cbgtab = cconvert->Cb_g_tab;
-  SHIFT_TEMPS
-
-  while (--num_rows >= 0) {
-    inptr0 = input_buf[0][input_row];
-    inptr1 = input_buf[1][input_row];
-    inptr2 = input_buf[2][input_row];
-    input_row++;
-    outptr = *output_buf++;
-    for (col = 0; col < num_cols; col++) {
-      y  = GETJSAMPLE(inptr0[col]);
-      cb = GETJSAMPLE(inptr1[col]);
-      cr = GETJSAMPLE(inptr2[col]);
-      /* Range-limiting is essential due to noise introduced by DCT losses. */
-      outptr[RGB_RED] =   range_limit[y + Crrtab[cr]];
-      outptr[RGB_GREEN] = range_limit[y +
-			      ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
-						 SCALEBITS))];
-      outptr[RGB_BLUE] =  range_limit[y + Cbbtab[cb]];
-      outptr += RGB_PIXELSIZE;
-    }
-  }
-}
-
-
-/**************** Cases other than YCbCr -> RGB **************/
-
-
-/*
- * Color conversion for no colorspace change: just copy the data,
- * converting from separate-planes to interleaved representation.
- */
-
-METHODDEF(void)
-null_convert (j_decompress_ptr cinfo,
-	      JSAMPIMAGE input_buf, JDIMENSION input_row,
-	      JSAMPARRAY output_buf, int num_rows)
-{
-  JSAMPROW inptr, outptr;
-  JDIMENSION count;
-  int num_components = cinfo->num_components;
-  JDIMENSION num_cols = cinfo->output_width;
-  int ci;
-
-  while (--num_rows >= 0) {
-    for (ci = 0; ci < num_components; ci++) {
-      inptr = input_buf[ci][input_row];
-      outptr = output_buf[0] + ci;
-      for (count = num_cols; count > 0; count--) {
-	*outptr = *inptr++;	/* needn't bother with GETJSAMPLE() here */
-	outptr += num_components;
-      }
-    }
-    input_row++;
-    output_buf++;
-  }
-}
-
-
-/*
- * Color conversion for grayscale: just copy the data.
- * This also works for YCbCr -> grayscale conversion, in which
- * we just copy the Y (luminance) component and ignore chrominance.
- */
-
-METHODDEF(void)
-grayscale_convert (j_decompress_ptr cinfo,
-		   JSAMPIMAGE input_buf, JDIMENSION input_row,
-		   JSAMPARRAY output_buf, int num_rows)
-{
-  jcopy_sample_rows(input_buf[0], (int) input_row, output_buf, 0,
-		    num_rows, cinfo->output_width);
-}
-
-
-/*
- * Adobe-style YCCK->CMYK conversion.
- * We convert YCbCr to R=1-C, G=1-M, and B=1-Y using the same
- * conversion as above, while passing K (black) unchanged.
- * We assume build_ycc_rgb_table has been called.
- */
-
-METHODDEF(void)
-ycck_cmyk_convert (j_decompress_ptr cinfo,
-		   JSAMPIMAGE input_buf, JDIMENSION input_row,
-		   JSAMPARRAY output_buf, int num_rows)
-{
-  my_cconvert_ptr cconvert = (my_cconvert_ptr) cinfo->cconvert;
-  int y, cb, cr;
-  JSAMPROW outptr;
-  JSAMPROW inptr0, inptr1, inptr2, inptr3;
-  JDIMENSION col;
-  JDIMENSION num_cols = cinfo->output_width;
-  /* copy these pointers into registers if possible */
-  JSAMPLE * range_limit = cinfo->sample_range_limit;
-  int * Crrtab = cconvert->Cr_r_tab;
-  int * Cbbtab = cconvert->Cb_b_tab;
-  INT32 * Crgtab = cconvert->Cr_g_tab;
-  INT32 * Cbgtab = cconvert->Cb_g_tab;
-  SHIFT_TEMPS
-
-  while (--num_rows >= 0) {
-    inptr0 = input_buf[0][input_row];
-    inptr1 = input_buf[1][input_row];
-    inptr2 = input_buf[2][input_row];
-    inptr3 = input_buf[3][input_row];
-    input_row++;
-    outptr = *output_buf++;
-    for (col = 0; col < num_cols; col++) {
-      y  = GETJSAMPLE(inptr0[col]);
-      cb = GETJSAMPLE(inptr1[col]);
-      cr = GETJSAMPLE(inptr2[col]);
-      /* Range-limiting is essential due to noise introduced by DCT losses. */
-      outptr[0] = range_limit[MAXJSAMPLE - (y + Crrtab[cr])];	/* red */
-      outptr[1] = range_limit[MAXJSAMPLE - (y +			/* green */
-			      ((int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr],
-						 SCALEBITS)))];
-      outptr[2] = range_limit[MAXJSAMPLE - (y + Cbbtab[cb])];	/* blue */
-      /* K passes through unchanged */
-      outptr[3] = inptr3[col];	/* don't need GETJSAMPLE here */
-      outptr += 4;
-    }
-  }
-}
-
-
-/*
- * Empty method for start_pass.
- */
-
-METHODDEF(void)
-start_pass_dcolor (j_decompress_ptr cinfo)
-{
-  /* no work needed */
-}
-
-
-/*
- * Module initialization routine for output colorspace conversion.
- */
-
-GLOBAL(void)
-jinit_color_deconverter (j_decompress_ptr cinfo)
-{
-  my_cconvert_ptr cconvert;
-  int ci;
-
-  cconvert = (my_cconvert_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_color_deconverter));
-  cinfo->cconvert = (struct jpeg_color_deconverter *) cconvert;
-  cconvert->pub.start_pass = start_pass_dcolor;
-
-  /* Make sure num_components agrees with jpeg_color_space */
-  switch (cinfo->jpeg_color_space) {
-  case JCS_GRAYSCALE:
-    if (cinfo->num_components != 1)
-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
-    break;
-
-  case JCS_RGB:
-  case JCS_YCbCr:
-    if (cinfo->num_components != 3)
-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
-    break;
-
-  case JCS_CMYK:
-  case JCS_YCCK:
-    if (cinfo->num_components != 4)
-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
-    break;
-
-  default:			/* JCS_UNKNOWN can be anything */
-    if (cinfo->num_components < 1)
-      ERREXIT(cinfo, JERR_BAD_J_COLORSPACE);
-    break;
-  }
-
-  /* Set out_color_components and conversion method based on requested space.
-   * Also clear the component_needed flags for any unused components,
-   * so that earlier pipeline stages can avoid useless computation.
-   */
-
-  switch (cinfo->out_color_space) {
-  case JCS_GRAYSCALE:
-    cinfo->out_color_components = 1;
-    if (cinfo->jpeg_color_space == JCS_GRAYSCALE ||
-	cinfo->jpeg_color_space == JCS_YCbCr) {
-      cconvert->pub.color_convert = grayscale_convert;
-      /* For color->grayscale conversion, only the Y (0) component is needed */
-      for (ci = 1; ci < cinfo->num_components; ci++)
-	cinfo->comp_info[ci].component_needed = FALSE;
-    } else
-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
-    break;
-
-  case JCS_RGB:
-    cinfo->out_color_components = RGB_PIXELSIZE;
-    if (cinfo->jpeg_color_space == JCS_YCbCr) {
-      cconvert->pub.color_convert = ycc_rgb_convert;
-      build_ycc_rgb_table(cinfo);
-    } else if (cinfo->jpeg_color_space == JCS_RGB && RGB_PIXELSIZE == 3) {
-      cconvert->pub.color_convert = null_convert;
-    } else
-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
-    break;
-
-  case JCS_CMYK:
-    cinfo->out_color_components = 4;
-    if (cinfo->jpeg_color_space == JCS_YCCK) {
-      cconvert->pub.color_convert = ycck_cmyk_convert;
-      build_ycc_rgb_table(cinfo);
-    } else if (cinfo->jpeg_color_space == JCS_CMYK) {
-      cconvert->pub.color_convert = null_convert;
-    } else
-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
-    break;
-
-  default:
-    /* Permit null conversion to same output space */
-    if (cinfo->out_color_space == cinfo->jpeg_color_space) {
-      cinfo->out_color_components = cinfo->num_components;
-      cconvert->pub.color_convert = null_convert;
-    } else			/* unsupported non-null conversion */
-      ERREXIT(cinfo, JERR_CONVERSION_NOTIMPL);
-    break;
-  }
-
-  if (cinfo->quantize_colors)
-    cinfo->output_components = 1; /* single colormapped output component */
-  else
-    cinfo->output_components = cinfo->out_color_components;
-}

cde/lib/DtHelp/jpeg/jdct.h

@@ -1,199 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdct.h /main/2 1996/05/09 03:47:21 drk $ */
-/*
- * jdct.h
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This include file contains common declarations for the forward and
- * inverse DCT modules.  These declarations are private to the DCT managers
- * (jcdctmgr.c, jddctmgr.c) and the individual DCT algorithms.
- * The individual DCT algorithms are kept in separate files to ease 
- * machine-dependent tuning (e.g., assembly coding).
- */
-
-
-/*
- * A forward DCT routine is given a pointer to a work area of type DCTELEM[];
- * the DCT is to be performed in-place in that buffer.  Type DCTELEM is int
- * for 8-bit samples, INT32 for 12-bit samples.  (NOTE: Floating-point DCT
- * implementations use an array of type FAST_FLOAT, instead.)
- * The DCT inputs are expected to be signed (range +-CENTERJSAMPLE).
- * The DCT outputs are returned scaled up by a factor of 8; they therefore
- * have a range of +-8K for 8-bit data, +-128K for 12-bit data.  This
- * convention improves accuracy in integer implementations and saves some
- * work in floating-point ones.
- * Quantization of the output coefficients is done by jcdctmgr.c.
- */
-
-#if BITS_IN_JSAMPLE == 8
-typedef int DCTELEM;		/* 16 or 32 bits is fine */
-#else
-typedef INT32 DCTELEM;		/* must have 32 bits */
-#endif
-
-typedef JMETHOD(void, forward_DCT_method_ptr, (DCTELEM * data));
-typedef JMETHOD(void, float_DCT_method_ptr, (FAST_FLOAT * data));
-
-
-/*
- * An inverse DCT routine is given a pointer to the input JBLOCK and a pointer
- * to an output sample array.  The routine must dequantize the input data as
- * well as perform the IDCT; for dequantization, it uses the multiplier table
- * pointed to by compptr->dct_table.  The output data is to be placed into the
- * sample array starting at a specified column.  (Any row offset needed will
- * be applied to the array pointer before it is passed to the IDCT code.)
- * Note that the number of samples emitted by the IDCT routine is
- * DCT_scaled_size * DCT_scaled_size.
- */
-
-/* typedef inverse_DCT_method_ptr is declared in jpegint.h */
-
-/*
- * Each IDCT routine has its own ideas about the best dct_table element type.
- */
-
-typedef MULTIPLIER ISLOW_MULT_TYPE; /* short or int, whichever is faster */
-#if BITS_IN_JSAMPLE == 8
-typedef MULTIPLIER IFAST_MULT_TYPE; /* 16 bits is OK, use short if faster */
-#define IFAST_SCALE_BITS  2	/* fractional bits in scale factors */
-#else
-typedef INT32 IFAST_MULT_TYPE;	/* need 32 bits for scaled quantizers */
-#define IFAST_SCALE_BITS  13	/* fractional bits in scale factors */
-#endif
-typedef FAST_FLOAT FLOAT_MULT_TYPE; /* preferred floating type */
-
-
-/*
- * Each IDCT routine is responsible for range-limiting its results and
- * converting them to unsigned form (0..MAXJSAMPLE).  The raw outputs could
- * be quite far out of range if the input data is corrupt, so a bulletproof
- * range-limiting step is required.  We use a mask-and-table-lookup method
- * to do the combined operations quickly.  See the comments with
- * prepare_range_limit_table (in jdmaster.c) for more info.
- */
-
-#define IDCT_range_limit(cinfo)  ((cinfo)->sample_range_limit + CENTERJSAMPLE)
-
-#define RANGE_MASK  (MAXJSAMPLE * 4 + 3) /* 2 bits wider than legal samples */
-
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_fdct_islow		jFDislow
-#define jpeg_fdct_ifast		jFDifast
-#define jpeg_fdct_float		jFDfloat
-#define jpeg_idct_islow		jRDislow
-#define jpeg_idct_ifast		jRDifast
-#define jpeg_idct_float		jRDfloat
-#define jpeg_idct_4x4		jRD4x4
-#define jpeg_idct_2x2		jRD2x2
-#define jpeg_idct_1x1		jRD1x1
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-/* Extern declarations for the forward and inverse DCT routines. */
-
-EXTERN(void) jpeg_fdct_islow JPP((DCTELEM * data));
-EXTERN(void) jpeg_fdct_ifast JPP((DCTELEM * data));
-EXTERN(void) jpeg_fdct_float JPP((FAST_FLOAT * data));
-
-EXTERN(void) jpeg_idct_islow
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN(void) jpeg_idct_ifast
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN(void) jpeg_idct_float
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN(void) jpeg_idct_4x4
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN(void) jpeg_idct_2x2
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-EXTERN(void) jpeg_idct_1x1
-    JPP((j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	 JCOEFPTR coef_block, JSAMPARRAY output_buf, JDIMENSION output_col));
-
-
-/*
- * Macros for handling fixed-point arithmetic; these are used by many
- * but not all of the DCT/IDCT modules.
- *
- * All values are expected to be of type INT32.
- * Fractional constants are scaled left by CONST_BITS bits.
- * CONST_BITS is defined within each module using these macros,
- * and may differ from one module to the next.
- */
-
-#define ONE	((INT32) 1)
-#define CONST_SCALE (ONE << CONST_BITS)
-
-/* Convert a positive real constant to an integer scaled by CONST_SCALE.
- * Caution: some C compilers fail to reduce "FIX(constant)" at compile time,
- * thus causing a lot of useless floating-point operations at run time.
- */
-
-#define FIX(x)	((INT32) ((x) * CONST_SCALE + 0.5))
-
-/* Descale and correctly round an INT32 value that's scaled by N bits.
- * We assume RIGHT_SHIFT rounds towards minus infinity, so adding
- * the fudge factor is correct for either sign of X.
- */
-
-#define DESCALE(x,n)  RIGHT_SHIFT((x) + (ONE << ((n)-1)), n)
-
-/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
- * This macro is used only when the two inputs will actually be no more than
- * 16 bits wide, so that a 16x16->32 bit multiply can be used instead of a
- * full 32x32 multiply.  This provides a useful speedup on many machines.
- * Unfortunately there is no way to specify a 16x16->32 multiply portably
- * in C, but some C compilers will do the right thing if you provide the
- * correct combination of casts.
- */
-
-#ifdef SHORTxSHORT_32		/* may work if 'int' is 32 bits */
-#define MULTIPLY16C16(var,const)  (((INT16) (var)) * ((INT16) (const)))
-#endif
-#ifdef SHORTxLCONST_32		/* known to work with Microsoft C 6.0 */
-#define MULTIPLY16C16(var,const)  (((INT16) (var)) * ((INT32) (const)))
-#endif
-
-#ifndef MULTIPLY16C16		/* default definition */
-#define MULTIPLY16C16(var,const)  ((var) * (const))
-#endif
-
-/* Same except both inputs are variables. */
-
-#ifdef SHORTxSHORT_32		/* may work if 'int' is 32 bits */
-#define MULTIPLY16V16(var1,var2)  (((INT16) (var1)) * ((INT16) (var2)))
-#endif
-
-#ifndef MULTIPLY16V16		/* default definition */
-#define MULTIPLY16V16(var1,var2)  ((var1) * (var2))
-#endif

cde/lib/DtHelp/jpeg/jddctmgr.c

@@ -1,292 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jddctmgr.c /main/2 1996/05/09 03:47:35 drk $ */
-/*
- * jddctmgr.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains the inverse-DCT management logic.
- * This code selects a particular IDCT implementation to be used,
- * and it performs related housekeeping chores.  No code in this file
- * is executed per IDCT step, only during output pass setup.
- *
- * Note that the IDCT routines are responsible for performing coefficient
- * dequantization as well as the IDCT proper.  This module sets up the
- * dequantization multiplier table needed by the IDCT routine.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h"		/* Private declarations for DCT subsystem */
-
-
-/*
- * The decompressor input side (jdinput.c) saves away the appropriate
- * quantization table for each component at the start of the first scan
- * involving that component.  (This is necessary in order to correctly
- * decode files that reuse Q-table slots.)
- * When we are ready to make an output pass, the saved Q-table is converted
- * to a multiplier table that will actually be used by the IDCT routine.
- * The multiplier table contents are IDCT-method-dependent.  To support
- * application changes in IDCT method between scans, we can remake the
- * multiplier tables if necessary.
- * In buffered-image mode, the first output pass may occur before any data
- * has been seen for some components, and thus before their Q-tables have
- * been saved away.  To handle this case, multiplier tables are preset
- * to zeroes; the result of the IDCT will be a neutral gray level.
- */
-
-
-/* Private subobject for this module */
-
-typedef struct {
-  struct jpeg_inverse_dct pub;	/* public fields */
-
-  /* This array contains the IDCT method code that each multiplier table
-   * is currently set up for, or -1 if it's not yet set up.
-   * The actual multiplier tables are pointed to by dct_table in the
-   * per-component comp_info structures.
-   */
-  int cur_method[MAX_COMPONENTS];
-} my_idct_controller;
-
-typedef my_idct_controller * my_idct_ptr;
-
-
-/* Allocated multiplier tables: big enough for any supported variant */
-
-typedef union {
-  ISLOW_MULT_TYPE islow_array[DCTSIZE2];
-#ifdef DCT_IFAST_SUPPORTED
-  IFAST_MULT_TYPE ifast_array[DCTSIZE2];
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
-  FLOAT_MULT_TYPE float_array[DCTSIZE2];
-#endif
-} multiplier_table;
-
-
-/* The current scaled-IDCT routines require ISLOW-style multiplier tables,
- * so be sure to compile that code if either ISLOW or SCALING is requested.
- */
-#ifdef DCT_ISLOW_SUPPORTED
-#define PROVIDE_ISLOW_TABLES
-#else
-#ifdef IDCT_SCALING_SUPPORTED
-#define PROVIDE_ISLOW_TABLES
-#endif
-#endif
-
-
-/*
- * Prepare for an output pass.
- * Here we select the proper IDCT routine for each component and build
- * a matching multiplier table.
- */
-
-METHODDEF(void)
-start_pass (j_decompress_ptr cinfo)
-{
-  my_idct_ptr idct = (my_idct_ptr) cinfo->idct;
-  int ci, i;
-  jpeg_component_info *compptr;
-  int method = 0;
-  inverse_DCT_method_ptr method_ptr = NULL;
-  JQUANT_TBL * qtbl;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Select the proper IDCT routine for this component's scaling */
-    switch (compptr->DCT_scaled_size) {
-#ifdef IDCT_SCALING_SUPPORTED
-    case 1:
-      method_ptr = jpeg_idct_1x1;
-      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
-      break;
-    case 2:
-      method_ptr = jpeg_idct_2x2;
-      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
-      break;
-    case 4:
-      method_ptr = jpeg_idct_4x4;
-      method = JDCT_ISLOW;	/* jidctred uses islow-style table */
-      break;
-#endif
-    case DCTSIZE:
-      switch (cinfo->dct_method) {
-#ifdef DCT_ISLOW_SUPPORTED
-      case JDCT_ISLOW:
-	method_ptr = jpeg_idct_islow;
-	method = JDCT_ISLOW;
-	break;
-#endif
-#ifdef DCT_IFAST_SUPPORTED
-      case JDCT_IFAST:
-	method_ptr = jpeg_idct_ifast;
-	method = JDCT_IFAST;
-	break;
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
-      case JDCT_FLOAT:
-	method_ptr = jpeg_idct_float;
-	method = JDCT_FLOAT;
-	break;
-#endif
-      default:
-	ERREXIT(cinfo, JERR_NOT_COMPILED);
-	break;
-      }
-      break;
-    default:
-      ERREXIT1(cinfo, JERR_BAD_DCTSIZE, compptr->DCT_scaled_size);
-      break;
-    }
-    idct->pub.inverse_DCT[ci] = method_ptr;
-    /* Create multiplier table from quant table.
-     * However, we can skip this if the component is uninteresting
-     * or if we already built the table.  Also, if no quant table
-     * has yet been saved for the component, we leave the
-     * multiplier table all-zero; we'll be reading zeroes from the
-     * coefficient controller's buffer anyway.
-     */
-    if (! compptr->component_needed || idct->cur_method[ci] == method)
-      continue;
-    qtbl = compptr->quant_table;
-    if (qtbl == NULL)		/* happens if no data yet for component */
-      continue;
-    idct->cur_method[ci] = method;
-    switch (method) {
-#ifdef PROVIDE_ISLOW_TABLES
-    case JDCT_ISLOW:
-      {
-	/* For LL&M IDCT method, multipliers are equal to raw quantization
-	 * coefficients, but are stored as ints to ensure access efficiency.
-	 */
-	ISLOW_MULT_TYPE * ismtbl = (ISLOW_MULT_TYPE *) compptr->dct_table;
-	for (i = 0; i < DCTSIZE2; i++) {
-	  ismtbl[i] = (ISLOW_MULT_TYPE) qtbl->quantval[i];
-	}
-      }
-      break;
-#endif
-#ifdef DCT_IFAST_SUPPORTED
-    case JDCT_IFAST:
-      {
-	/* For AA&N IDCT method, multipliers are equal to quantization
-	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
-	 *   scalefactor[0] = 1
-	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
-	 * For integer operation, the multiplier table is to be scaled by
-	 * IFAST_SCALE_BITS.
-	 */
-	IFAST_MULT_TYPE * ifmtbl = (IFAST_MULT_TYPE *) compptr->dct_table;
-#define CONST_BITS 14
-	static const INT16 aanscales[DCTSIZE2] = {
-	  /* precomputed values scaled up by 14 bits */
-	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
-	  22725, 31521, 29692, 26722, 22725, 17855, 12299,  6270,
-	  21407, 29692, 27969, 25172, 21407, 16819, 11585,  5906,
-	  19266, 26722, 25172, 22654, 19266, 15137, 10426,  5315,
-	  16384, 22725, 21407, 19266, 16384, 12873,  8867,  4520,
-	  12873, 17855, 16819, 15137, 12873, 10114,  6967,  3552,
-	   8867, 12299, 11585, 10426,  8867,  6967,  4799,  2446,
-	   4520,  6270,  5906,  5315,  4520,  3552,  2446,  1247
-	};
-	SHIFT_TEMPS
-
-	for (i = 0; i < DCTSIZE2; i++) {
-	  ifmtbl[i] = (IFAST_MULT_TYPE)
-	    DESCALE(MULTIPLY16V16((INT32) qtbl->quantval[i],
-				  (INT32) aanscales[i]),
-		    CONST_BITS-IFAST_SCALE_BITS);
-	}
-      }
-      break;
-#endif
-#ifdef DCT_FLOAT_SUPPORTED
-    case JDCT_FLOAT:
-      {
-	/* For float AA&N IDCT method, multipliers are equal to quantization
-	 * coefficients scaled by scalefactor[row]*scalefactor[col], where
-	 *   scalefactor[0] = 1
-	 *   scalefactor[k] = cos(k*PI/16) * sqrt(2)    for k=1..7
-	 */
-	FLOAT_MULT_TYPE * fmtbl = (FLOAT_MULT_TYPE *) compptr->dct_table;
-	int row, col;
-	static const double aanscalefactor[DCTSIZE] = {
-	  1.0, 1.387039845, 1.306562965, 1.175875602,
-	  1.0, 0.785694958, 0.541196100, 0.275899379
-	};
-
-	i = 0;
-	for (row = 0; row < DCTSIZE; row++) {
-	  for (col = 0; col < DCTSIZE; col++) {
-	    fmtbl[i] = (FLOAT_MULT_TYPE)
-	      ((double) qtbl->quantval[i] *
-	       aanscalefactor[row] * aanscalefactor[col]);
-	    i++;
-	  }
-	}
-      }
-      break;
-#endif
-    default:
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-      break;
-    }
-  }
-}
-
-
-/*
- * Initialize IDCT manager.
- */
-
-GLOBAL(void)
-jinit_inverse_dct (j_decompress_ptr cinfo)
-{
-  my_idct_ptr idct;
-  int ci;
-  jpeg_component_info *compptr;
-
-  idct = (my_idct_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_idct_controller));
-  cinfo->idct = (struct jpeg_inverse_dct *) idct;
-  idct->pub.start_pass = start_pass;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Allocate and pre-zero a multiplier table for each component */
-    compptr->dct_table =
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  SIZEOF(multiplier_table));
-    MEMZERO(compptr->dct_table, SIZEOF(multiplier_table));
-    /* Mark multiplier table not yet set up for any method */
-    idct->cur_method[ci] = -1;
-  }
-}

cde/lib/DtHelp/jpeg/jdhuff.c

@@ -1,597 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdhuff.c /main/2 1996/05/09 03:47:48 drk $ */
-/*
- * jdhuff.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains Huffman entropy decoding routines.
- *
- * Much of the complexity here has to do with supporting input suspension.
- * If the data source module demands suspension, we want to be able to back
- * up to the start of the current MCU.  To do this, we copy state variables
- * into local working storage, and update them back to the permanent
- * storage only upon successful completion of an MCU.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdhuff.h"		/* Declarations shared with jdphuff.c */
-
-
-/*
- * Expanded entropy decoder object for Huffman decoding.
- *
- * The savable_state subrecord contains fields that change within an MCU,
- * but must not be updated permanently until we complete the MCU.
- */
-
-typedef struct {
-  int last_dc_val[MAX_COMPS_IN_SCAN]; /* last DC coef for each component */
-} savable_state;
-
-/* This macro is to work around compilers with missing or broken
- * structure assignment.  You'll need to fix this code if you have
- * such a compiler and you change MAX_COMPS_IN_SCAN.
- */
-
-#ifndef NO_STRUCT_ASSIGN
-#define ASSIGN_STATE(dest,src)  ((dest) = (src))
-#else
-#if MAX_COMPS_IN_SCAN == 4
-#define ASSIGN_STATE(dest,src)  \
-	((dest).last_dc_val[0] = (src).last_dc_val[0], \
-	 (dest).last_dc_val[1] = (src).last_dc_val[1], \
-	 (dest).last_dc_val[2] = (src).last_dc_val[2], \
-	 (dest).last_dc_val[3] = (src).last_dc_val[3])
-#endif
-#endif
-
-
-typedef struct {
-  struct jpeg_entropy_decoder pub; /* public fields */
-
-  /* These fields are loaded into local variables at start of each MCU.
-   * In case of suspension, we exit WITHOUT updating them.
-   */
-  bitread_perm_state bitstate;	/* Bit buffer at start of MCU */
-  savable_state saved;		/* Other state at start of MCU */
-
-  /* These fields are NOT loaded into local working state. */
-  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
-
-  /* Pointers to derived tables (these workspaces have image lifespan) */
-  d_derived_tbl * dc_derived_tbls[NUM_HUFF_TBLS];
-  d_derived_tbl * ac_derived_tbls[NUM_HUFF_TBLS];
-} huff_entropy_decoder;
-
-typedef huff_entropy_decoder * huff_entropy_ptr;
-
-
-/*
- * Initialize for a Huffman-compressed scan.
- */
-
-METHODDEF(void)
-start_pass_huff_decoder (j_decompress_ptr cinfo)
-{
-  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
-  int ci, dctbl, actbl;
-  jpeg_component_info * compptr;
-
-  /* Check that the scan parameters Ss, Se, Ah/Al are OK for sequential JPEG.
-   * This ought to be an error condition, but we make it a warning because
-   * there are some baseline files out there with all zeroes in these bytes.
-   */
-  if (cinfo->Ss != 0 || cinfo->Se != DCTSIZE2-1 ||
-      cinfo->Ah != 0 || cinfo->Al != 0)
-    WARNMS(cinfo, JWRN_NOT_SEQUENTIAL);
-
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-    compptr = cinfo->cur_comp_info[ci];
-    dctbl = compptr->dc_tbl_no;
-    actbl = compptr->ac_tbl_no;
-    /* Make sure requested tables are present */
-    if (dctbl < 0 || dctbl >= NUM_HUFF_TBLS ||
-	cinfo->dc_huff_tbl_ptrs[dctbl] == NULL)
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, dctbl);
-    if (actbl < 0 || actbl >= NUM_HUFF_TBLS ||
-	cinfo->ac_huff_tbl_ptrs[actbl] == NULL)
-      ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, actbl);
-    /* Compute derived values for Huffman tables */
-    /* We may do this more than once for a table, but it's not expensive */
-    jpeg_make_d_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[dctbl],
-			    & entropy->dc_derived_tbls[dctbl]);
-    jpeg_make_d_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[actbl],
-			    & entropy->ac_derived_tbls[actbl]);
-    /* Initialize DC predictions to 0 */
-    entropy->saved.last_dc_val[ci] = 0;
-  }
-
-  /* Initialize bitread state variables */
-  entropy->bitstate.bits_left = 0;
-  entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
-  entropy->bitstate.printed_eod = FALSE;
-
-  /* Initialize restart counter */
-  entropy->restarts_to_go = cinfo->restart_interval;
-}
-
-
-/*
- * Compute the derived values for a Huffman table.
- * Note this is also used by jdphuff.c.
- */
-
-GLOBAL(void)
-jpeg_make_d_derived_tbl (j_decompress_ptr cinfo, JHUFF_TBL * htbl,
-			 d_derived_tbl ** pdtbl)
-{
-  d_derived_tbl *dtbl;
-  int p, i, l, si;
-  int lookbits, ctr;
-  char huffsize[257];
-  unsigned int huffcode[257];
-  unsigned int code;
-
-  /* Allocate a workspace if we haven't already done so. */
-  if (*pdtbl == NULL)
-    *pdtbl = (d_derived_tbl *)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  SIZEOF(d_derived_tbl));
-  dtbl = *pdtbl;
-  dtbl->pub = htbl;		/* fill in back link */
-  
-  /* Figure C.1: make table of Huffman code length for each symbol */
-  /* Note that this is in code-length order. */
-
-  p = 0;
-  for (l = 1; l <= 16; l++) {
-    for (i = 1; i <= (int) htbl->bits[l]; i++)
-      huffsize[p++] = (char) l;
-  }
-  huffsize[p] = 0;
-  
-  /* Figure C.2: generate the codes themselves */
-  /* Note that this is in code-length order. */
-  
-  code = 0;
-  si = huffsize[0];
-  p = 0;
-  while (huffsize[p]) {
-    while (((int) huffsize[p]) == si) {
-      huffcode[p++] = code;
-      code++;
-    }
-    code <<= 1;
-    si++;
-  }
-
-  /* Figure F.15: generate decoding tables for bit-sequential decoding */
-
-  p = 0;
-  for (l = 1; l <= 16; l++) {
-    if (htbl->bits[l]) {
-      dtbl->valptr[l] = p; /* huffval[] index of 1st symbol of code length l */
-      dtbl->mincode[l] = huffcode[p]; /* minimum code of length l */
-      p += htbl->bits[l];
-      dtbl->maxcode[l] = huffcode[p-1]; /* maximum code of length l */
-    } else {
-      dtbl->maxcode[l] = -1;	/* -1 if no codes of this length */
-    }
-  }
-  dtbl->maxcode[17] = 0xFFFFFL; /* ensures jpeg_huff_decode terminates */
-
-  /* Compute lookahead tables to speed up decoding.
-   * First we set all the table entries to 0, indicating "too long";
-   * then we iterate through the Huffman codes that are short enough and
-   * fill in all the entries that correspond to bit sequences starting
-   * with that code.
-   */
-
-  MEMZERO(dtbl->look_nbits, SIZEOF(dtbl->look_nbits));
-
-  p = 0;
-  for (l = 1; l <= HUFF_LOOKAHEAD; l++) {
-    for (i = 1; i <= (int) htbl->bits[l]; i++, p++) {
-      /* l = current code's length, p = its index in huffcode[] & huffval[]. */
-      /* Generate left-justified code followed by all possible bit sequences */
-      lookbits = huffcode[p] << (HUFF_LOOKAHEAD-l);
-      for (ctr = 1 << (HUFF_LOOKAHEAD-l); ctr > 0; ctr--) {
-	dtbl->look_nbits[lookbits] = l;
-	dtbl->look_sym[lookbits] = htbl->huffval[p];
-	lookbits++;
-      }
-    }
-  }
-}
-
-
-/*
- * Out-of-line code for bit fetching (shared with jdphuff.c).
- * See jdhuff.h for info about usage.
- * Note: current values of get_buffer and bits_left are passed as parameters,
- * but are returned in the corresponding fields of the state struct.
- *
- * On most machines MIN_GET_BITS should be 25 to allow the full 32-bit width
- * of get_buffer to be used.  (On machines with wider words, an even larger
- * buffer could be used.)  However, on some machines 32-bit shifts are
- * quite slow and take time proportional to the number of places shifted.
- * (This is true with most PC compilers, for instance.)  In this case it may
- * be a win to set MIN_GET_BITS to the minimum value of 15.  This reduces the
- * average shift distance at the cost of more calls to jpeg_fill_bit_buffer.
- */
-
-#ifdef SLOW_SHIFT_32
-#define MIN_GET_BITS  15	/* minimum allowable value */
-#else
-#define MIN_GET_BITS  (BIT_BUF_SIZE-7)
-#endif
-
-
-GLOBAL(boolean)
-jpeg_fill_bit_buffer (bitread_working_state * state,
-		      bit_buf_type get_buffer, int bits_left,
-		      int nbits)
-/* Load up the bit buffer to a depth of at least nbits */
-{
-  /* Copy heavily used state fields into locals (hopefully registers) */
-  const JOCTET * next_input_byte = state->next_input_byte;
-  size_t bytes_in_buffer = state->bytes_in_buffer;
-  int c;
-
-  /* Attempt to load at least MIN_GET_BITS bits into get_buffer. */
-  /* (It is assumed that no request will be for more than that many bits.) */
-
-  while (bits_left < MIN_GET_BITS) {
-    /* Attempt to read a byte */
-    if (state->unread_marker != 0)
-      goto no_more_data;	/* can't advance past a marker */
-
-    if (bytes_in_buffer == 0) {
-      if (! (*state->cinfo->src->fill_input_buffer) (state->cinfo))
-	return FALSE;
-      next_input_byte = state->cinfo->src->next_input_byte;
-      bytes_in_buffer = state->cinfo->src->bytes_in_buffer;
-    }
-    bytes_in_buffer--;
-    c = GETJOCTET(*next_input_byte++);
-
-    /* If it's 0xFF, check and discard stuffed zero byte */
-    if (c == 0xFF) {
-      do {
-	if (bytes_in_buffer == 0) {
-	  if (! (*state->cinfo->src->fill_input_buffer) (state->cinfo))
-	    return FALSE;
-	  next_input_byte = state->cinfo->src->next_input_byte;
-	  bytes_in_buffer = state->cinfo->src->bytes_in_buffer;
-	}
-	bytes_in_buffer--;
-	c = GETJOCTET(*next_input_byte++);
-      } while (c == 0xFF);
-
-      if (c == 0) {
-	/* Found FF/00, which represents an FF data byte */
-	c = 0xFF;
-      } else {
-	/* Oops, it's actually a marker indicating end of compressed data. */
-	/* Better put it back for use later */
-	state->unread_marker = c;
-
-      no_more_data:
-	/* There should be enough bits still left in the data segment; */
-	/* if so, just break out of the outer while loop. */
-	if (bits_left >= nbits)
-	  break;
-	/* Uh-oh.  Report corrupted data to user and stuff zeroes into
-	 * the data stream, so that we can produce some kind of image.
-	 * Note that this code will be repeated for each byte demanded
-	 * for the rest of the segment.  We use a nonvolatile flag to ensure
-	 * that only one warning message appears.
-	 */
-	if (! *(state->printed_eod_ptr)) {
-	  WARNMS(state->cinfo, JWRN_HIT_MARKER);
-	  *(state->printed_eod_ptr) = TRUE;
-	}
-	c = 0;			/* insert a zero byte into bit buffer */
-      }
-    }
-
-    /* OK, load c into get_buffer */
-    get_buffer = (get_buffer << 8) | c;
-    bits_left += 8;
-  }
-
-  /* Unload the local registers */
-  state->next_input_byte = next_input_byte;
-  state->bytes_in_buffer = bytes_in_buffer;
-  state->get_buffer = get_buffer;
-  state->bits_left = bits_left;
-
-  return TRUE;
-}
-
-
-/*
- * Out-of-line code for Huffman code decoding.
- * See jdhuff.h for info about usage.
- */
-
-GLOBAL(int)
-jpeg_huff_decode (bitread_working_state * state,
-		  bit_buf_type get_buffer, int bits_left,
-		  d_derived_tbl * htbl, int min_bits)
-{
-  int l = min_bits;
-  INT32 code;
-
-  /* HUFF_DECODE has determined that the code is at least min_bits */
-  /* bits long, so fetch that many bits in one swoop. */
-
-  CHECK_BIT_BUFFER(*state, l, return -1);
-  code = GET_BITS(l);
-
-  /* Collect the rest of the Huffman code one bit at a time. */
-  /* This is per Figure F.16 in the JPEG spec. */
-
-  while (code > htbl->maxcode[l]) {
-    code <<= 1;
-    CHECK_BIT_BUFFER(*state, 1, return -1);
-    code |= GET_BITS(1);
-    l++;
-  }
-
-  /* Unload the local registers */
-  state->get_buffer = get_buffer;
-  state->bits_left = bits_left;
-
-  /* With garbage input we may reach the sentinel value l = 17. */
-
-  if (l > 16) {
-    WARNMS(state->cinfo, JWRN_HUFF_BAD_CODE);
-    return 0;			/* fake a zero as the safest result */
-  }
-
-  return htbl->pub->huffval[ htbl->valptr[l] +
-			    ((int) (code - htbl->mincode[l])) ];
-}
-
-
-/*
- * Figure F.12: extend sign bit.
- * On some machines, a shift and add will be faster than a table lookup.
- */
-
-#ifdef AVOID_TABLES
-
-#define HUFF_EXTEND(x,s)  ((x) < (1<<((s)-1)) ? (x) + (((-1)<<(s)) + 1) : (x))
-
-#else
-
-#define HUFF_EXTEND(x,s)  ((x) < extend_test[s] ? (x) + extend_offset[s] : (x))
-
-static const int extend_test[16] =   /* entry n is 2**(n-1) */
-  { 0, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
-    0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000 };
-
-static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
-  { 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
-    ((-1)<<5) + 1, ((-1)<<6) + 1, ((-1)<<7) + 1, ((-1)<<8) + 1,
-    ((-1)<<9) + 1, ((-1)<<10) + 1, ((-1)<<11) + 1, ((-1)<<12) + 1,
-    ((-1)<<13) + 1, ((-1)<<14) + 1, ((-1)<<15) + 1 };
-
-#endif /* AVOID_TABLES */
-
-
-/*
- * Check for a restart marker & resynchronize decoder.
- * Returns FALSE if must suspend.
- */
-
-LOCAL(boolean)
-process_restart (j_decompress_ptr cinfo)
-{
-  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
-  int ci;
-
-  /* Throw away any unused bits remaining in bit buffer; */
-  /* include any full bytes in next_marker's count of discarded bytes */
-  cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
-  entropy->bitstate.bits_left = 0;
-
-  /* Advance past the RSTn marker */
-  if (! (*cinfo->marker->read_restart_marker) (cinfo))
-    return FALSE;
-
-  /* Re-initialize DC predictions to 0 */
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++)
-    entropy->saved.last_dc_val[ci] = 0;
-
-  /* Reset restart counter */
-  entropy->restarts_to_go = cinfo->restart_interval;
-
-  /* Next segment can get another out-of-data warning */
-  entropy->bitstate.printed_eod = FALSE;
-
-  return TRUE;
-}
-
-
-/*
- * Decode and return one MCU's worth of Huffman-compressed coefficients.
- * The coefficients are reordered from zigzag order into natural array order,
- * but are not dequantized.
- *
- * The i'th block of the MCU is stored into the block pointed to by
- * MCU_data[i].  WE ASSUME THIS AREA HAS BEEN ZEROED BY THE CALLER.
- * (Wholesale zeroing is usually a little faster than retail...)
- *
- * Returns FALSE if data source requested suspension.  In that case no
- * changes have been made to permanent state.  (Exception: some output
- * coefficients may already have been assigned.  This is harmless for
- * this module, since we'll just re-assign them on the next call.)
- */
-
-METHODDEF(boolean)
-decode_mcu (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
-{
-  huff_entropy_ptr entropy = (huff_entropy_ptr) cinfo->entropy;
-  int s, k, r;
-  int blkn, ci;
-  JBLOCKROW block;
-  BITREAD_STATE_VARS;
-  savable_state state;
-  d_derived_tbl * dctbl;
-  d_derived_tbl * actbl;
-  jpeg_component_info * compptr;
-
-  /* Process restart marker if needed; may have to suspend */
-  if (cinfo->restart_interval) {
-    if (entropy->restarts_to_go == 0)
-      if (! process_restart(cinfo))
-	return FALSE;
-  }
-
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(state, entropy->saved);
-
-  /* Outer loop handles each block in the MCU */
-
-  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
-    block = MCU_data[blkn];
-    ci = cinfo->MCU_membership[blkn];
-    compptr = cinfo->cur_comp_info[ci];
-    dctbl = entropy->dc_derived_tbls[compptr->dc_tbl_no];
-    actbl = entropy->ac_derived_tbls[compptr->ac_tbl_no];
-
-    /* Decode a single block's worth of coefficients */
-
-    /* Section F.2.2.1: decode the DC coefficient difference */
-    HUFF_DECODE(s, br_state, dctbl, return FALSE, label1);
-    if (s) {
-      CHECK_BIT_BUFFER(br_state, s, return FALSE);
-      r = GET_BITS(s);
-      s = HUFF_EXTEND(r, s);
-    }
-
-    /* Shortcut if component's values are not interesting */
-    if (! compptr->component_needed)
-      goto skip_ACs;
-
-    /* Convert DC difference to actual value, update last_dc_val */
-    s += state.last_dc_val[ci];
-    state.last_dc_val[ci] = s;
-    /* Output the DC coefficient (assumes jpeg_natural_order[0] = 0) */
-    (*block)[0] = (JCOEF) s;
-
-    /* Do we need to decode the AC coefficients for this component? */
-    if (compptr->DCT_scaled_size > 1) {
-
-      /* Section F.2.2.2: decode the AC coefficients */
-      /* Since zeroes are skipped, output area must be cleared beforehand */
-      for (k = 1; k < DCTSIZE2; k++) {
-	HUFF_DECODE(s, br_state, actbl, return FALSE, label2);
-      
-	r = s >> 4;
-	s &= 15;
-      
-	if (s) {
-	  k += r;
-	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
-	  r = GET_BITS(s);
-	  s = HUFF_EXTEND(r, s);
-	  /* Output coefficient in natural (dezigzagged) order.
-	   * Note: the extra entries in jpeg_natural_order[] will save us
-	   * if k >= DCTSIZE2, which could happen if the data is corrupted.
-	   */
-	  (*block)[jpeg_natural_order[k]] = (JCOEF) s;
-	} else {
-	  if (r != 15)
-	    break;
-	  k += 15;
-	}
-      }
-
-    } else {
-skip_ACs:
-
-      /* Section F.2.2.2: decode the AC coefficients */
-      /* In this path we just discard the values */
-      for (k = 1; k < DCTSIZE2; k++) {
-	HUFF_DECODE(s, br_state, actbl, return FALSE, label3);
-      
-	r = s >> 4;
-	s &= 15;
-      
-	if (s) {
-	  k += r;
-	  CHECK_BIT_BUFFER(br_state, s, return FALSE);
-	  DROP_BITS(s);
-	} else {
-	  if (r != 15)
-	    break;
-	  k += 15;
-	}
-      }
-
-    }
-  }
-
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(entropy->saved, state);
-
-  /* Account for restart interval (no-op if not using restarts) */
-  entropy->restarts_to_go--;
-
-  return TRUE;
-}
-
-
-/*
- * Module initialization routine for Huffman entropy decoding.
- */
-
-GLOBAL(void)
-jinit_huff_decoder (j_decompress_ptr cinfo)
-{
-  huff_entropy_ptr entropy;
-  int i;
-
-  entropy = (huff_entropy_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(huff_entropy_decoder));
-  cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
-  entropy->pub.start_pass = start_pass_huff_decoder;
-  entropy->pub.decode_mcu = decode_mcu;
-
-  /* Mark tables unallocated */
-  for (i = 0; i < NUM_HUFF_TBLS; i++) {
-    entropy->dc_derived_tbls[i] = entropy->ac_derived_tbls[i] = NULL;
-  }
-}

cde/lib/DtHelp/jpeg/jdhuff.h

@@ -1,225 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdhuff.h /main/2 1996/05/09 03:48:02 drk $ */
-/*
- * jdhuff.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains declarations for Huffman entropy decoding routines
- * that are shared between the sequential decoder (jdhuff.c) and the
- * progressive decoder (jdphuff.c).  No other modules need to see these.
- */
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_make_d_derived_tbl	jMkDDerived
-#define jpeg_fill_bit_buffer	jFilBitBuf
-#define jpeg_huff_decode	jHufDecode
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/* Derived data constructed for each Huffman table */
-
-#define HUFF_LOOKAHEAD	8	/* # of bits of lookahead */
-
-typedef struct {
-  /* Basic tables: (element [0] of each array is unused) */
-  INT32 mincode[17];		/* smallest code of length k */
-  INT32 maxcode[18];		/* largest code of length k (-1 if none) */
-  /* (maxcode[17] is a sentinel to ensure jpeg_huff_decode terminates) */
-  int valptr[17];		/* huffval[] index of 1st symbol of length k */
-
-  /* Link to public Huffman table (needed only in jpeg_huff_decode) */
-  JHUFF_TBL *pub;
-
-  /* Lookahead tables: indexed by the next HUFF_LOOKAHEAD bits of
-   * the input data stream.  If the next Huffman code is no more
-   * than HUFF_LOOKAHEAD bits long, we can obtain its length and
-   * the corresponding symbol directly from these tables.
-   */
-  int look_nbits[1<<HUFF_LOOKAHEAD]; /* # bits, or 0 if too long */
-  UINT8 look_sym[1<<HUFF_LOOKAHEAD]; /* symbol, or unused */
-} d_derived_tbl;
-
-/* Expand a Huffman table definition into the derived format */
-EXTERN(void) jpeg_make_d_derived_tbl JPP((j_decompress_ptr cinfo,
-				JHUFF_TBL * htbl, d_derived_tbl ** pdtbl));
-
-
-/*
- * Fetching the next N bits from the input stream is a time-critical operation
- * for the Huffman decoders.  We implement it with a combination of inline
- * macros and out-of-line subroutines.  Note that N (the number of bits
- * demanded at one time) never exceeds 15 for JPEG use.
- *
- * We read source bytes into get_buffer and dole out bits as needed.
- * If get_buffer already contains enough bits, they are fetched in-line
- * by the macros CHECK_BIT_BUFFER and GET_BITS.  When there aren't enough
- * bits, jpeg_fill_bit_buffer is called; it will attempt to fill get_buffer
- * as full as possible (not just to the number of bits needed; this
- * prefetching reduces the overhead cost of calling jpeg_fill_bit_buffer).
- * Note that jpeg_fill_bit_buffer may return FALSE to indicate suspension.
- * On TRUE return, jpeg_fill_bit_buffer guarantees that get_buffer contains
- * at least the requested number of bits --- dummy zeroes are inserted if
- * necessary.
- */
-
-typedef INT32 bit_buf_type;	/* type of bit-extraction buffer */
-#define BIT_BUF_SIZE  32	/* size of buffer in bits */
-
-/* If long is > 32 bits on your machine, and shifting/masking longs is
- * reasonably fast, making bit_buf_type be long and setting BIT_BUF_SIZE
- * appropriately should be a win.  Unfortunately we can't do this with
- * something like  #define BIT_BUF_SIZE (sizeof(bit_buf_type)*8)
- * because not all machines measure sizeof in 8-bit bytes.
- */
-
-typedef struct {		/* Bitreading state saved across MCUs */
-  bit_buf_type get_buffer;	/* current bit-extraction buffer */
-  int bits_left;		/* # of unused bits in it */
-  boolean printed_eod;		/* flag to suppress multiple warning msgs */
-} bitread_perm_state;
-
-typedef struct {		/* Bitreading working state within an MCU */
-  /* current data source state */
-  const JOCTET * next_input_byte; /* => next byte to read from source */
-  size_t bytes_in_buffer;	/* # of bytes remaining in source buffer */
-  int unread_marker;		/* nonzero if we have hit a marker */
-  /* bit input buffer --- note these values are kept in register variables,
-   * not in this struct, inside the inner loops.
-   */
-  bit_buf_type get_buffer;	/* current bit-extraction buffer */
-  int bits_left;		/* # of unused bits in it */
-  /* pointers needed by jpeg_fill_bit_buffer */
-  j_decompress_ptr cinfo;	/* back link to decompress master record */
-  boolean * printed_eod_ptr;	/* => flag in permanent state */
-} bitread_working_state;
-
-/* Macros to declare and load/save bitread local variables. */
-#define BITREAD_STATE_VARS  \
-	bit_buf_type get_buffer;  \
-	int bits_left;  \
-	bitread_working_state br_state
-
-#define BITREAD_LOAD_STATE(cinfop,permstate)  \
-	br_state.cinfo = cinfop; \
-	br_state.next_input_byte = cinfop->src->next_input_byte; \
-	br_state.bytes_in_buffer = cinfop->src->bytes_in_buffer; \
-	br_state.unread_marker = cinfop->unread_marker; \
-	get_buffer = permstate.get_buffer; \
-	bits_left = permstate.bits_left; \
-	br_state.printed_eod_ptr = & permstate.printed_eod
-
-#define BITREAD_SAVE_STATE(cinfop,permstate)  \
-	cinfop->src->next_input_byte = br_state.next_input_byte; \
-	cinfop->src->bytes_in_buffer = br_state.bytes_in_buffer; \
-	cinfop->unread_marker = br_state.unread_marker; \
-	permstate.get_buffer = get_buffer; \
-	permstate.bits_left = bits_left
-
-/*
- * These macros provide the in-line portion of bit fetching.
- * Use CHECK_BIT_BUFFER to ensure there are N bits in get_buffer
- * before using GET_BITS, PEEK_BITS, or DROP_BITS.
- * The variables get_buffer and bits_left are assumed to be locals,
- * but the state struct might not be (jpeg_huff_decode needs this).
- *	CHECK_BIT_BUFFER(state,n,action);
- *		Ensure there are N bits in get_buffer; if suspend, take action.
- *      val = GET_BITS(n);
- *		Fetch next N bits.
- *      val = PEEK_BITS(n);
- *		Fetch next N bits without removing them from the buffer.
- *	DROP_BITS(n);
- *		Discard next N bits.
- * The value N should be a simple variable, not an expression, because it
- * is evaluated multiple times.
- */
-
-#define CHECK_BIT_BUFFER(state,nbits,action) \
-	{ if (bits_left < (nbits)) {  \
-	    if (! jpeg_fill_bit_buffer(&(state),get_buffer,bits_left,nbits))  \
-	      { action; }  \
-	    get_buffer = (state).get_buffer; bits_left = (state).bits_left; } }
-
-#define GET_BITS(nbits) \
-	(((int) (get_buffer >> (bits_left -= (nbits)))) & ((1<<(nbits))-1))
-
-#define PEEK_BITS(nbits) \
-	(((int) (get_buffer >> (bits_left -  (nbits)))) & ((1<<(nbits))-1))
-
-#define DROP_BITS(nbits) \
-	(bits_left -= (nbits))
-
-/* Load up the bit buffer to a depth of at least nbits */
-EXTERN(boolean) jpeg_fill_bit_buffer
-	JPP((bitread_working_state * state, bit_buf_type get_buffer,
-	     int bits_left, int nbits));
-
-
-/*
- * Code for extracting next Huffman-coded symbol from input bit stream.
- * Again, this is time-critical and we make the main paths be macros.
- *
- * We use a lookahead table to process codes of up to HUFF_LOOKAHEAD bits
- * without looping.  Usually, more than 95% of the Huffman codes will be 8
- * or fewer bits long.  The few overlength codes are handled with a loop,
- * which need not be inline code.
- *
- * Notes about the HUFF_DECODE macro:
- * 1. Near the end of the data segment, we may fail to get enough bits
- *    for a lookahead.  In that case, we do it the hard way.
- * 2. If the lookahead table contains no entry, the next code must be
- *    more than HUFF_LOOKAHEAD bits long.
- * 3. jpeg_huff_decode returns -1 if forced to suspend.
- */
-
-#define HUFF_DECODE(result,state,htbl,failaction,slowlabel) \
-{ int nb, look; \
-  if (bits_left < HUFF_LOOKAHEAD) { \
-    if (! jpeg_fill_bit_buffer(&state,get_buffer,bits_left, 0)) {failaction;} \
-    get_buffer = state.get_buffer; bits_left = state.bits_left; \
-    if (bits_left < HUFF_LOOKAHEAD) { \
-      nb = 1; goto slowlabel; \
-    } \
-  } \
-  look = PEEK_BITS(HUFF_LOOKAHEAD); \
-  if ((nb = htbl->look_nbits[look]) != 0) { \
-    DROP_BITS(nb); \
-    result = htbl->look_sym[look]; \
-  } else { \
-    nb = HUFF_LOOKAHEAD+1; \
-slowlabel: \
-    if ((result=jpeg_huff_decode(&state,get_buffer,bits_left,htbl,nb)) < 0) \
-	{ failaction; } \
-    get_buffer = state.get_buffer; bits_left = state.bits_left; \
-  } \
-}
-
-/* Out-of-line case for Huffman code fetching */
-EXTERN(int) jpeg_huff_decode
-	JPP((bitread_working_state * state, bit_buf_type get_buffer,
-	     int bits_left, d_derived_tbl * htbl, int min_bits));

cde/lib/DtHelp/jpeg/jdinput.c

@@ -1,404 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdinput.c /main/2 1996/05/09 03:48:17 drk $ */
-/*
- * jdinput.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains input control logic for the JPEG decompressor.
- * These routines are concerned with controlling the decompressor's input
- * processing (marker reading and coefficient decoding).  The actual input
- * reading is done in jdmarker.c, jdhuff.c, and jdphuff.c.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Private state */
-
-typedef struct {
-  struct jpeg_input_controller pub; /* public fields */
-
-  boolean inheaders;		/* TRUE until first SOS is reached */
-} my_input_controller;
-
-typedef my_input_controller * my_inputctl_ptr;
-
-
-/* Forward declarations */
-METHODDEF(int) consume_markers JPP((j_decompress_ptr cinfo));
-
-
-/*
- * Routines to calculate various quantities related to the size of the image.
- */
-
-LOCAL(void)
-initial_setup (j_decompress_ptr cinfo)
-/* Called once, when first SOS marker is reached */
-{
-  int ci;
-  jpeg_component_info *compptr;
-
-  /* Make sure image isn't bigger than I can handle */
-  if ((long) cinfo->image_height > (long) JPEG_MAX_DIMENSION ||
-      (long) cinfo->image_width > (long) JPEG_MAX_DIMENSION)
-    ERREXIT1(cinfo, JERR_IMAGE_TOO_BIG, (unsigned int) JPEG_MAX_DIMENSION);
-
-  /* For now, precision must match compiled-in value... */
-  if (cinfo->data_precision != BITS_IN_JSAMPLE)
-    ERREXIT1(cinfo, JERR_BAD_PRECISION, cinfo->data_precision);
-
-  /* Check that number of components won't exceed internal array sizes */
-  if (cinfo->num_components > MAX_COMPONENTS)
-    ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->num_components,
-	     MAX_COMPONENTS);
-
-  /* Compute maximum sampling factors; check factor validity */
-  cinfo->max_h_samp_factor = 1;
-  cinfo->max_v_samp_factor = 1;
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    if (compptr->h_samp_factor<=0 || compptr->h_samp_factor>MAX_SAMP_FACTOR ||
-	compptr->v_samp_factor<=0 || compptr->v_samp_factor>MAX_SAMP_FACTOR)
-      ERREXIT(cinfo, JERR_BAD_SAMPLING);
-    cinfo->max_h_samp_factor = MAX(cinfo->max_h_samp_factor,
-				   compptr->h_samp_factor);
-    cinfo->max_v_samp_factor = MAX(cinfo->max_v_samp_factor,
-				   compptr->v_samp_factor);
-  }
-
-  /* We initialize DCT_scaled_size and min_DCT_scaled_size to DCTSIZE.
-   * In the full decompressor, this will be overridden by jdmaster.c;
-   * but in the transcoder, jdmaster.c is not used, so we must do it here.
-   */
-  cinfo->min_DCT_scaled_size = DCTSIZE;
-
-  /* Compute dimensions of components */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    compptr->DCT_scaled_size = DCTSIZE;
-    /* Size in DCT blocks */
-    compptr->width_in_blocks = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
-		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
-    compptr->height_in_blocks = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
-		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
-    /* downsampled_width and downsampled_height will also be overridden by
-     * jdmaster.c if we are doing full decompression.  The transcoder library
-     * doesn't use these values, but the calling application might.
-     */
-    /* Size in samples */
-    compptr->downsampled_width = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width * (long) compptr->h_samp_factor,
-		    (long) cinfo->max_h_samp_factor);
-    compptr->downsampled_height = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height * (long) compptr->v_samp_factor,
-		    (long) cinfo->max_v_samp_factor);
-    /* Mark component needed, until color conversion says otherwise */
-    compptr->component_needed = TRUE;
-    /* Mark no quantization table yet saved for component */
-    compptr->quant_table = NULL;
-  }
-
-  /* Compute number of fully interleaved MCU rows. */
-  cinfo->total_iMCU_rows = (JDIMENSION)
-    jdiv_round_up((long) cinfo->image_height,
-		  (long) (cinfo->max_v_samp_factor*DCTSIZE));
-
-  /* Decide whether file contains multiple scans */
-  if (cinfo->comps_in_scan < cinfo->num_components || cinfo->progressive_mode)
-    cinfo->inputctl->has_multiple_scans = TRUE;
-  else
-    cinfo->inputctl->has_multiple_scans = FALSE;
-}
-
-
-LOCAL(void)
-per_scan_setup (j_decompress_ptr cinfo)
-/* Do computations that are needed before processing a JPEG scan */
-/* cinfo->comps_in_scan and cinfo->cur_comp_info[] were set from SOS marker */
-{
-  int ci, mcublks, tmp;
-  jpeg_component_info *compptr;
-  
-  if (cinfo->comps_in_scan == 1) {
-    
-    /* Noninterleaved (single-component) scan */
-    compptr = cinfo->cur_comp_info[0];
-    
-    /* Overall image size in MCUs */
-    cinfo->MCUs_per_row = compptr->width_in_blocks;
-    cinfo->MCU_rows_in_scan = compptr->height_in_blocks;
-    
-    /* For noninterleaved scan, always one block per MCU */
-    compptr->MCU_width = 1;
-    compptr->MCU_height = 1;
-    compptr->MCU_blocks = 1;
-    compptr->MCU_sample_width = compptr->DCT_scaled_size;
-    compptr->last_col_width = 1;
-    /* For noninterleaved scans, it is convenient to define last_row_height
-     * as the number of block rows present in the last iMCU row.
-     */
-    tmp = (int) (compptr->height_in_blocks % compptr->v_samp_factor);
-    if (tmp == 0) tmp = compptr->v_samp_factor;
-    compptr->last_row_height = tmp;
-    
-    /* Prepare array describing MCU composition */
-    cinfo->blocks_in_MCU = 1;
-    cinfo->MCU_membership[0] = 0;
-    
-  } else {
-    
-    /* Interleaved (multi-component) scan */
-    if (cinfo->comps_in_scan <= 0 || cinfo->comps_in_scan > MAX_COMPS_IN_SCAN)
-      ERREXIT2(cinfo, JERR_COMPONENT_COUNT, cinfo->comps_in_scan,
-	       MAX_COMPS_IN_SCAN);
-    
-    /* Overall image size in MCUs */
-    cinfo->MCUs_per_row = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width,
-		    (long) (cinfo->max_h_samp_factor*DCTSIZE));
-    cinfo->MCU_rows_in_scan = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height,
-		    (long) (cinfo->max_v_samp_factor*DCTSIZE));
-    
-    cinfo->blocks_in_MCU = 0;
-    
-    for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-      compptr = cinfo->cur_comp_info[ci];
-      /* Sampling factors give # of blocks of component in each MCU */
-      compptr->MCU_width = compptr->h_samp_factor;
-      compptr->MCU_height = compptr->v_samp_factor;
-      compptr->MCU_blocks = compptr->MCU_width * compptr->MCU_height;
-      compptr->MCU_sample_width = compptr->MCU_width * compptr->DCT_scaled_size;
-      /* Figure number of non-dummy blocks in last MCU column & row */
-      tmp = (int) (compptr->width_in_blocks % compptr->MCU_width);
-      if (tmp == 0) tmp = compptr->MCU_width;
-      compptr->last_col_width = tmp;
-      tmp = (int) (compptr->height_in_blocks % compptr->MCU_height);
-      if (tmp == 0) tmp = compptr->MCU_height;
-      compptr->last_row_height = tmp;
-      /* Prepare array describing MCU composition */
-      mcublks = compptr->MCU_blocks;
-      if (cinfo->blocks_in_MCU + mcublks > D_MAX_BLOCKS_IN_MCU)
-	ERREXIT(cinfo, JERR_BAD_MCU_SIZE);
-      while (mcublks-- > 0) {
-	cinfo->MCU_membership[cinfo->blocks_in_MCU++] = ci;
-      }
-    }
-    
-  }
-}
-
-
-/*
- * Save away a copy of the Q-table referenced by each component present
- * in the current scan, unless already saved during a prior scan.
- *
- * In a multiple-scan JPEG file, the encoder could assign different components
- * the same Q-table slot number, but change table definitions between scans
- * so that each component uses a different Q-table.  (The IJG encoder is not
- * currently capable of doing this, but other encoders might.)  Since we want
- * to be able to dequantize all the components at the end of the file, this
- * means that we have to save away the table actually used for each component.
- * We do this by copying the table at the start of the first scan containing
- * the component.
- * The JPEG spec prohibits the encoder from changing the contents of a Q-table
- * slot between scans of a component using that slot.  If the encoder does so
- * anyway, this decoder will simply use the Q-table values that were current
- * at the start of the first scan for the component.
- *
- * The decompressor output side looks only at the saved quant tables,
- * not at the current Q-table slots.
- */
-
-LOCAL(void)
-latch_quant_tables (j_decompress_ptr cinfo)
-{
-  int ci, qtblno;
-  jpeg_component_info *compptr;
-  JQUANT_TBL * qtbl;
-
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-    compptr = cinfo->cur_comp_info[ci];
-    /* No work if we already saved Q-table for this component */
-    if (compptr->quant_table != NULL)
-      continue;
-    /* Make sure specified quantization table is present */
-    qtblno = compptr->quant_tbl_no;
-    if (qtblno < 0 || qtblno >= NUM_QUANT_TBLS ||
-	cinfo->quant_tbl_ptrs[qtblno] == NULL)
-      ERREXIT1(cinfo, JERR_NO_QUANT_TABLE, qtblno);
-    /* OK, save away the quantization table */
-    qtbl = (JQUANT_TBL *)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  SIZEOF(JQUANT_TBL));
-    MEMCOPY(qtbl, cinfo->quant_tbl_ptrs[qtblno], SIZEOF(JQUANT_TBL));
-    compptr->quant_table = qtbl;
-  }
-}
-
-
-/*
- * Initialize the input modules to read a scan of compressed data.
- * The first call to this is done by jdmaster.c after initializing
- * the entire decompressor (during jpeg_start_decompress).
- * Subsequent calls come from consume_markers, below.
- */
-
-METHODDEF(void)
-start_input_pass (j_decompress_ptr cinfo)
-{
-  per_scan_setup(cinfo);
-  latch_quant_tables(cinfo);
-  (*cinfo->entropy->start_pass) (cinfo);
-  (*cinfo->coef->start_input_pass) (cinfo);
-  cinfo->inputctl->consume_input = cinfo->coef->consume_data;
-}
-
-
-/*
- * Finish up after inputting a compressed-data scan.
- * This is called by the coefficient controller after it's read all
- * the expected data of the scan.
- */
-
-METHODDEF(void)
-finish_input_pass (j_decompress_ptr cinfo)
-{
-  cinfo->inputctl->consume_input = consume_markers;
-}
-
-
-/*
- * Read JPEG markers before, between, or after compressed-data scans.
- * Change state as necessary when a new scan is reached.
- * Return value is JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
- *
- * The consume_input method pointer points either here or to the
- * coefficient controller's consume_data routine, depending on whether
- * we are reading a compressed data segment or inter-segment markers.
- */
-
-METHODDEF(int)
-consume_markers (j_decompress_ptr cinfo)
-{
-  my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
-  int val;
-
-  if (inputctl->pub.eoi_reached) /* After hitting EOI, read no further */
-    return JPEG_REACHED_EOI;
-
-  val = (*cinfo->marker->read_markers) (cinfo);
-
-  switch (val) {
-  case JPEG_REACHED_SOS:	/* Found SOS */
-    if (inputctl->inheaders) {	/* 1st SOS */
-      initial_setup(cinfo);
-      inputctl->inheaders = FALSE;
-      /* Note: start_input_pass must be called by jdmaster.c
-       * before any more input can be consumed.  jdapi.c is
-       * responsible for enforcing this sequencing.
-       */
-    } else {			/* 2nd or later SOS marker */
-      if (! inputctl->pub.has_multiple_scans)
-	ERREXIT(cinfo, JERR_EOI_EXPECTED); /* Oops, I wasn't expecting this! */
-      start_input_pass(cinfo);
-    }
-    break;
-  case JPEG_REACHED_EOI:	/* Found EOI */
-    inputctl->pub.eoi_reached = TRUE;
-    if (inputctl->inheaders) {	/* Tables-only datastream, apparently */
-      if (cinfo->marker->saw_SOF)
-	ERREXIT(cinfo, JERR_SOF_NO_SOS);
-    } else {
-      /* Prevent infinite loop in coef ctlr's decompress_data routine
-       * if user set output_scan_number larger than number of scans.
-       */
-      if (cinfo->output_scan_number > cinfo->input_scan_number)
-	cinfo->output_scan_number = cinfo->input_scan_number;
-    }
-    break;
-  case JPEG_SUSPENDED:
-    break;
-  }
-
-  return val;
-}
-
-
-/*
- * Reset state to begin a fresh datastream.
- */
-
-METHODDEF(void)
-reset_input_controller (j_decompress_ptr cinfo)
-{
-  my_inputctl_ptr inputctl = (my_inputctl_ptr) cinfo->inputctl;
-
-  inputctl->pub.consume_input = consume_markers;
-  inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */
-  inputctl->pub.eoi_reached = FALSE;
-  inputctl->inheaders = TRUE;
-  /* Reset other modules */
-  (*cinfo->err->reset_error_mgr) ((j_common_ptr) cinfo);
-  (*cinfo->marker->reset_marker_reader) (cinfo);
-  /* Reset progression state -- would be cleaner if entropy decoder did this */
-  cinfo->coef_bits = NULL;
-}
-
-
-/*
- * Initialize the input controller module.
- * This is called only once, when the decompression object is created.
- */
-
-GLOBAL(void)
-jinit_input_controller (j_decompress_ptr cinfo)
-{
-  my_inputctl_ptr inputctl;
-
-  /* Create subobject in permanent pool */
-  inputctl = (my_inputctl_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				SIZEOF(my_input_controller));
-  cinfo->inputctl = (struct jpeg_input_controller *) inputctl;
-  /* Initialize method pointers */
-  inputctl->pub.consume_input = consume_markers;
-  inputctl->pub.reset_input_controller = reset_input_controller;
-  inputctl->pub.start_input_pass = start_input_pass;
-  inputctl->pub.finish_input_pass = finish_input_pass;
-  /* Initialize state: can't use reset_input_controller since we don't
-   * want to try to reset other modules yet.
-   */
-  inputctl->pub.has_multiple_scans = FALSE; /* "unknown" would be better */
-  inputctl->pub.eoi_reached = FALSE;
-  inputctl->inheaders = TRUE;
-}

cde/lib/DtHelp/jpeg/jdmainct.c

@@ -1,535 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdmainct.c /main/2 1996/05/09 03:48:30 drk $ */
-/*
- * jdmainct.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains the main buffer controller for decompression.
- * The main buffer lies between the JPEG decompressor proper and the
- * post-processor; it holds downsampled data in the JPEG colorspace.
- *
- * Note that this code is bypassed in raw-data mode, since the application
- * supplies the equivalent of the main buffer in that case.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/*
- * In the current system design, the main buffer need never be a full-image
- * buffer; any full-height buffers will be found inside the coefficient or
- * postprocessing controllers.  Nonetheless, the main controller is not
- * trivial.  Its responsibility is to provide context rows for upsampling/
- * rescaling, and doing this in an efficient fashion is a bit tricky.
- *
- * Postprocessor input data is counted in "row groups".  A row group
- * is defined to be (v_samp_factor * DCT_scaled_size / min_DCT_scaled_size)
- * sample rows of each component.  (We require DCT_scaled_size values to be
- * chosen such that these numbers are integers.  In practice DCT_scaled_size
- * values will likely be powers of two, so we actually have the stronger
- * condition that DCT_scaled_size / min_DCT_scaled_size is an integer.)
- * Upsampling will typically produce max_v_samp_factor pixel rows from each
- * row group (times any additional scale factor that the upsampler is
- * applying).
- *
- * The coefficient controller will deliver data to us one iMCU row at a time;
- * each iMCU row contains v_samp_factor * DCT_scaled_size sample rows, or
- * exactly min_DCT_scaled_size row groups.  (This amount of data corresponds
- * to one row of MCUs when the image is fully interleaved.)  Note that the
- * number of sample rows varies across components, but the number of row
- * groups does not.  Some garbage sample rows may be included in the last iMCU
- * row at the bottom of the image.
- *
- * Depending on the vertical scaling algorithm used, the upsampler may need
- * access to the sample row(s) above and below its current input row group.
- * The upsampler is required to set need_context_rows TRUE at global selection
- * time if so.  When need_context_rows is FALSE, this controller can simply
- * obtain one iMCU row at a time from the coefficient controller and dole it
- * out as row groups to the postprocessor.
- *
- * When need_context_rows is TRUE, this controller guarantees that the buffer
- * passed to postprocessing contains at least one row group's worth of samples
- * above and below the row group(s) being processed.  Note that the context
- * rows "above" the first passed row group appear at negative row offsets in
- * the passed buffer.  At the top and bottom of the image, the required
- * context rows are manufactured by duplicating the first or last real sample
- * row; this avoids having special cases in the upsampling inner loops.
- *
- * The amount of context is fixed at one row group just because that's a
- * convenient number for this controller to work with.  The existing
- * upsamplers really only need one sample row of context.  An upsampler
- * supporting arbitrary output rescaling might wish for more than one row
- * group of context when shrinking the image; tough, we don't handle that.
- * (This is justified by the assumption that downsizing will be handled mostly
- * by adjusting the DCT_scaled_size values, so that the actual scale factor at
- * the upsample step needn't be much less than one.)
- *
- * To provide the desired context, we have to retain the last two row groups
- * of one iMCU row while reading in the next iMCU row.  (The last row group
- * can't be processed until we have another row group for its below-context,
- * and so we have to save the next-to-last group too for its above-context.)
- * We could do this most simply by copying data around in our buffer, but
- * that'd be very slow.  We can avoid copying any data by creating a rather
- * strange pointer structure.  Here's how it works.  We allocate a workspace
- * consisting of M+2 row groups (where M = min_DCT_scaled_size is the number
- * of row groups per iMCU row).  We create two sets of redundant pointers to
- * the workspace.  Labeling the physical row groups 0 to M+1, the synthesized
- * pointer lists look like this:
- *                   M+1                          M-1
- * master pointer --> 0         master pointer --> 0
- *                    1                            1
- *                   ...                          ...
- *                   M-3                          M-3
- *                   M-2                           M
- *                   M-1                          M+1
- *                    M                           M-2
- *                   M+1                          M-1
- *                    0                            0
- * We read alternate iMCU rows using each master pointer; thus the last two
- * row groups of the previous iMCU row remain un-overwritten in the workspace.
- * The pointer lists are set up so that the required context rows appear to
- * be adjacent to the proper places when we pass the pointer lists to the
- * upsampler.
- *
- * The above pictures describe the normal state of the pointer lists.
- * At top and bottom of the image, we diddle the pointer lists to duplicate
- * the first or last sample row as necessary (this is cheaper than copying
- * sample rows around).
- *
- * This scheme breaks down if M < 2, ie, min_DCT_scaled_size is 1.  In that
- * situation each iMCU row provides only one row group so the buffering logic
- * must be different (eg, we must read two iMCU rows before we can emit the
- * first row group).  For now, we simply do not support providing context
- * rows when min_DCT_scaled_size is 1.  That combination seems unlikely to
- * be worth providing --- if someone wants a 1/8th-size preview, they probably
- * want it quick and dirty, so a context-free upsampler is sufficient.
- */
-
-
-/* Private buffer controller object */
-
-typedef struct {
-  struct jpeg_d_main_controller pub; /* public fields */
-
-  /* Pointer to allocated workspace (M or M+2 row groups). */
-  JSAMPARRAY buffer[MAX_COMPONENTS];
-
-  boolean buffer_full;		/* Have we gotten an iMCU row from decoder? */
-  JDIMENSION rowgroup_ctr;	/* counts row groups output to postprocessor */
-
-  /* Remaining fields are only used in the context case. */
-
-  /* These are the master pointers to the funny-order pointer lists. */
-  JSAMPIMAGE xbuffer[2];	/* pointers to weird pointer lists */
-
-  int whichptr;			/* indicates which pointer set is now in use */
-  int context_state;		/* process_data state machine status */
-  JDIMENSION rowgroups_avail;	/* row groups available to postprocessor */
-  JDIMENSION iMCU_row_ctr;	/* counts iMCU rows to detect image top/bot */
-} my_main_controller;
-
-typedef my_main_controller * my_main_ptr;
-
-/* context_state values: */
-#define CTX_PREPARE_FOR_IMCU	0	/* need to prepare for MCU row */
-#define CTX_PROCESS_IMCU	1	/* feeding iMCU to postprocessor */
-#define CTX_POSTPONED_ROW	2	/* feeding postponed row group */
-
-
-/* Forward declarations */
-METHODDEF(void) process_data_simple_main
-	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
-	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
-METHODDEF(void) process_data_context_main
-	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
-	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
-#ifdef QUANT_2PASS_SUPPORTED
-METHODDEF(void) process_data_crank_post
-	JPP((j_decompress_ptr cinfo, JSAMPARRAY output_buf,
-	     JDIMENSION *out_row_ctr, JDIMENSION out_rows_avail));
-#endif
-
-
-LOCAL(void)
-alloc_funny_pointers (j_decompress_ptr cinfo)
-/* Allocate space for the funny pointer lists.
- * This is done only once, not once per pass.
- */
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-  int ci, rgroup;
-  int M = cinfo->min_DCT_scaled_size;
-  jpeg_component_info *compptr;
-  JSAMPARRAY xbuf;
-
-  /* Get top-level space for component array pointers.
-   * We alloc both arrays with one call to save a few cycles.
-   */
-  main->xbuffer[0] = (JSAMPIMAGE)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				cinfo->num_components * 2 * SIZEOF(JSAMPARRAY));
-  main->xbuffer[1] = main->xbuffer[0] + cinfo->num_components;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
-      cinfo->min_DCT_scaled_size; /* height of a row group of component */
-    /* Get space for pointer lists --- M+4 row groups in each list.
-     * We alloc both pointer lists with one call to save a few cycles.
-     */
-    xbuf = (JSAMPARRAY)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  2 * (rgroup * (M + 4)) * SIZEOF(JSAMPROW));
-    xbuf += rgroup;		/* want one row group at negative offsets */
-    main->xbuffer[0][ci] = xbuf;
-    xbuf += rgroup * (M + 4);
-    main->xbuffer[1][ci] = xbuf;
-  }
-}
-
-
-LOCAL(void)
-make_funny_pointers (j_decompress_ptr cinfo)
-/* Create the funny pointer lists discussed in the comments above.
- * The actual workspace is already allocated (in main->buffer),
- * and the space for the pointer lists is allocated too.
- * This routine just fills in the curiously ordered lists.
- * This will be repeated at the beginning of each pass.
- */
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-  int ci, i, rgroup;
-  int M = cinfo->min_DCT_scaled_size;
-  jpeg_component_info *compptr;
-  JSAMPARRAY buf, xbuf0, xbuf1;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
-      cinfo->min_DCT_scaled_size; /* height of a row group of component */
-    xbuf0 = main->xbuffer[0][ci];
-    xbuf1 = main->xbuffer[1][ci];
-    /* First copy the workspace pointers as-is */
-    buf = main->buffer[ci];
-    for (i = 0; i < rgroup * (M + 2); i++) {
-      xbuf0[i] = xbuf1[i] = buf[i];
-    }
-    /* In the second list, put the last four row groups in swapped order */
-    for (i = 0; i < rgroup * 2; i++) {
-      xbuf1[rgroup*(M-2) + i] = buf[rgroup*M + i];
-      xbuf1[rgroup*M + i] = buf[rgroup*(M-2) + i];
-    }
-    /* The wraparound pointers at top and bottom will be filled later
-     * (see set_wraparound_pointers, below).  Initially we want the "above"
-     * pointers to duplicate the first actual data line.  This only needs
-     * to happen in xbuffer[0].
-     */
-    for (i = 0; i < rgroup; i++) {
-      xbuf0[i - rgroup] = xbuf0[0];
-    }
-  }
-}
-
-
-LOCAL(void)
-set_wraparound_pointers (j_decompress_ptr cinfo)
-/* Set up the "wraparound" pointers at top and bottom of the pointer lists.
- * This changes the pointer list state from top-of-image to the normal state.
- */
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-  int ci, i, rgroup;
-  int M = cinfo->min_DCT_scaled_size;
-  jpeg_component_info *compptr;
-  JSAMPARRAY xbuf0, xbuf1;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
-      cinfo->min_DCT_scaled_size; /* height of a row group of component */
-    xbuf0 = main->xbuffer[0][ci];
-    xbuf1 = main->xbuffer[1][ci];
-    for (i = 0; i < rgroup; i++) {
-      xbuf0[i - rgroup] = xbuf0[rgroup*(M+1) + i];
-      xbuf1[i - rgroup] = xbuf1[rgroup*(M+1) + i];
-      xbuf0[rgroup*(M+2) + i] = xbuf0[i];
-      xbuf1[rgroup*(M+2) + i] = xbuf1[i];
-    }
-  }
-}
-
-
-LOCAL(void)
-set_bottom_pointers (j_decompress_ptr cinfo)
-/* Change the pointer lists to duplicate the last sample row at the bottom
- * of the image.  whichptr indicates which xbuffer holds the final iMCU row.
- * Also sets rowgroups_avail to indicate number of nondummy row groups in row.
- */
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-  int ci, i, rgroup, iMCUheight, rows_left;
-  jpeg_component_info *compptr;
-  JSAMPARRAY xbuf;
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Count sample rows in one iMCU row and in one row group */
-    iMCUheight = compptr->v_samp_factor * compptr->DCT_scaled_size;
-    rgroup = iMCUheight / cinfo->min_DCT_scaled_size;
-    /* Count nondummy sample rows remaining for this component */
-    rows_left = (int) (compptr->downsampled_height % (JDIMENSION) iMCUheight);
-    if (rows_left == 0) rows_left = iMCUheight;
-    /* Count nondummy row groups.  Should get same answer for each component,
-     * so we need only do it once.
-     */
-    if (ci == 0) {
-      main->rowgroups_avail = (JDIMENSION) ((rows_left-1) / rgroup + 1);
-    }
-    /* Duplicate the last real sample row rgroup*2 times; this pads out the
-     * last partial rowgroup and ensures at least one full rowgroup of context.
-     */
-    xbuf = main->xbuffer[main->whichptr][ci];
-    for (i = 0; i < rgroup * 2; i++) {
-      xbuf[rows_left + i] = xbuf[rows_left-1];
-    }
-  }
-}
-
-
-/*
- * Initialize for a processing pass.
- */
-
-METHODDEF(void)
-start_pass_main (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-
-  switch (pass_mode) {
-  case JBUF_PASS_THRU:
-    if (cinfo->upsample->need_context_rows) {
-      main->pub.process_data = process_data_context_main;
-      make_funny_pointers(cinfo); /* Create the xbuffer[] lists */
-      main->whichptr = 0;	/* Read first iMCU row into xbuffer[0] */
-      main->context_state = CTX_PREPARE_FOR_IMCU;
-      main->iMCU_row_ctr = 0;
-    } else {
-      /* Simple case with no context needed */
-      main->pub.process_data = process_data_simple_main;
-    }
-    main->buffer_full = FALSE;	/* Mark buffer empty */
-    main->rowgroup_ctr = 0;
-    break;
-#ifdef QUANT_2PASS_SUPPORTED
-  case JBUF_CRANK_DEST:
-    /* For last pass of 2-pass quantization, just crank the postprocessor */
-    main->pub.process_data = process_data_crank_post;
-    break;
-#endif
-  default:
-    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-    break;
-  }
-}
-
-
-/*
- * Process some data.
- * This handles the simple case where no context is required.
- */
-
-METHODDEF(void)
-process_data_simple_main (j_decompress_ptr cinfo,
-			  JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-			  JDIMENSION out_rows_avail)
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-  JDIMENSION rowgroups_avail;
-
-  /* Read input data if we haven't filled the main buffer yet */
-  if (! main->buffer_full) {
-    if (! (*cinfo->coef->decompress_data) (cinfo, main->buffer))
-      return;			/* suspension forced, can do nothing more */
-    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
-  }
-
-  /* There are always min_DCT_scaled_size row groups in an iMCU row. */
-  rowgroups_avail = (JDIMENSION) cinfo->min_DCT_scaled_size;
-  /* Note: at the bottom of the image, we may pass extra garbage row groups
-   * to the postprocessor.  The postprocessor has to check for bottom
-   * of image anyway (at row resolution), so no point in us doing it too.
-   */
-
-  /* Feed the postprocessor */
-  (*cinfo->post->post_process_data) (cinfo, main->buffer,
-				     &main->rowgroup_ctr, rowgroups_avail,
-				     output_buf, out_row_ctr, out_rows_avail);
-
-  /* Has postprocessor consumed all the data yet? If so, mark buffer empty */
-  if (main->rowgroup_ctr >= rowgroups_avail) {
-    main->buffer_full = FALSE;
-    main->rowgroup_ctr = 0;
-  }
-}
-
-
-/*
- * Process some data.
- * This handles the case where context rows must be provided.
- */
-
-METHODDEF(void)
-process_data_context_main (j_decompress_ptr cinfo,
-			   JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-			   JDIMENSION out_rows_avail)
-{
-  my_main_ptr main = (my_main_ptr) cinfo->main;
-
-  /* Read input data if we haven't filled the main buffer yet */
-  if (! main->buffer_full) {
-    if (! (*cinfo->coef->decompress_data) (cinfo,
-					   main->xbuffer[main->whichptr]))
-      return;			/* suspension forced, can do nothing more */
-    main->buffer_full = TRUE;	/* OK, we have an iMCU row to work with */
-    main->iMCU_row_ctr++;	/* count rows received */
-  }
-
-  /* Postprocessor typically will not swallow all the input data it is handed
-   * in one call (due to filling the output buffer first).  Must be prepared
-   * to exit and restart.  This switch lets us keep track of how far we got.
-   * Note that each case falls through to the next on successful completion.
-   */
-  switch (main->context_state) {
-  case CTX_POSTPONED_ROW:
-    /* Call postprocessor using previously set pointers for postponed row */
-    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
-			&main->rowgroup_ctr, main->rowgroups_avail,
-			output_buf, out_row_ctr, out_rows_avail);
-    if (main->rowgroup_ctr < main->rowgroups_avail)
-      return;			/* Need to suspend */
-    main->context_state = CTX_PREPARE_FOR_IMCU;
-    if (*out_row_ctr >= out_rows_avail)
-      return;			/* Postprocessor exactly filled output buf */
-    /*FALLTHROUGH*/
-  case CTX_PREPARE_FOR_IMCU:
-    /* Prepare to process first M-1 row groups of this iMCU row */
-    main->rowgroup_ctr = 0;
-    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size - 1);
-    /* Check for bottom of image: if so, tweak pointers to "duplicate"
-     * the last sample row, and adjust rowgroups_avail to ignore padding rows.
-     */
-    if (main->iMCU_row_ctr == cinfo->total_iMCU_rows)
-      set_bottom_pointers(cinfo);
-    main->context_state = CTX_PROCESS_IMCU;
-    /*FALLTHROUGH*/
-  case CTX_PROCESS_IMCU:
-    /* Call postprocessor using previously set pointers */
-    (*cinfo->post->post_process_data) (cinfo, main->xbuffer[main->whichptr],
-			&main->rowgroup_ctr, main->rowgroups_avail,
-			output_buf, out_row_ctr, out_rows_avail);
-    if (main->rowgroup_ctr < main->rowgroups_avail)
-      return;			/* Need to suspend */
-    /* After the first iMCU, change wraparound pointers to normal state */
-    if (main->iMCU_row_ctr == 1)
-      set_wraparound_pointers(cinfo);
-    /* Prepare to load new iMCU row using other xbuffer list */
-    main->whichptr ^= 1;	/* 0=>1 or 1=>0 */
-    main->buffer_full = FALSE;
-    /* Still need to process last row group of this iMCU row, */
-    /* which is saved at index M+1 of the other xbuffer */
-    main->rowgroup_ctr = (JDIMENSION) (cinfo->min_DCT_scaled_size + 1);
-    main->rowgroups_avail = (JDIMENSION) (cinfo->min_DCT_scaled_size + 2);
-    main->context_state = CTX_POSTPONED_ROW;
-  }
-}
-
-
-/*
- * Process some data.
- * Final pass of two-pass quantization: just call the postprocessor.
- * Source data will be the postprocessor controller's internal buffer.
- */
-
-#ifdef QUANT_2PASS_SUPPORTED
-
-METHODDEF(void)
-process_data_crank_post (j_decompress_ptr cinfo,
-			 JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-			 JDIMENSION out_rows_avail)
-{
-  (*cinfo->post->post_process_data) (cinfo, (JSAMPIMAGE) NULL,
-				     (JDIMENSION *) NULL, (JDIMENSION) 0,
-				     output_buf, out_row_ctr, out_rows_avail);
-}
-
-#endif /* QUANT_2PASS_SUPPORTED */
-
-
-/*
- * Initialize main buffer controller.
- */
-
-GLOBAL(void)
-jinit_d_main_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
-{
-  my_main_ptr main;
-  int ci, rgroup, ngroups;
-  jpeg_component_info *compptr;
-
-  main = (my_main_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_main_controller));
-  cinfo->main = (struct jpeg_d_main_controller *) main;
-  main->pub.start_pass = start_pass_main;
-
-  if (need_full_buffer)		/* shouldn't happen */
-    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-
-  /* Allocate the workspace.
-   * ngroups is the number of row groups we need.
-   */
-  if (cinfo->upsample->need_context_rows) {
-    if (cinfo->min_DCT_scaled_size < 2) /* unsupported, see comments above */
-      ERREXIT(cinfo, JERR_NOTIMPL);
-    alloc_funny_pointers(cinfo); /* Alloc space for xbuffer[] lists */
-    ngroups = cinfo->min_DCT_scaled_size + 2;
-  } else {
-    ngroups = cinfo->min_DCT_scaled_size;
-  }
-
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    rgroup = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
-      cinfo->min_DCT_scaled_size; /* height of a row group of component */
-    main->buffer[ci] = (*cinfo->mem->alloc_sarray)
-			((j_common_ptr) cinfo, JPOOL_IMAGE,
-			 compptr->width_in_blocks * compptr->DCT_scaled_size,
-			 (JDIMENSION) (rgroup * ngroups));
-  }
-}

cde/lib/DtHelp/jpeg/jdmarker.c

@@ -1,1078 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdmarker.c /main/2 1996/05/09 03:48:44 drk $ */
-/*
- * jdmarker.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains routines to decode JPEG datastream markers.
- * Most of the complexity arises from our desire to support input
- * suspension: if not all of the data for a marker is available,
- * we must exit back to the application.  On resumption, we reprocess
- * the marker.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-typedef enum {			/* JPEG marker codes */
-  M_SOF0  = 0xc0,
-  M_SOF1  = 0xc1,
-  M_SOF2  = 0xc2,
-  M_SOF3  = 0xc3,
-  
-  M_SOF5  = 0xc5,
-  M_SOF6  = 0xc6,
-  M_SOF7  = 0xc7,
-  
-  M_JPG   = 0xc8,
-  M_SOF9  = 0xc9,
-  M_SOF10 = 0xca,
-  M_SOF11 = 0xcb,
-  
-  M_SOF13 = 0xcd,
-  M_SOF14 = 0xce,
-  M_SOF15 = 0xcf,
-  
-  M_DHT   = 0xc4,
-  
-  M_DAC   = 0xcc,
-  
-  M_RST0  = 0xd0,
-  M_RST1  = 0xd1,
-  M_RST2  = 0xd2,
-  M_RST3  = 0xd3,
-  M_RST4  = 0xd4,
-  M_RST5  = 0xd5,
-  M_RST6  = 0xd6,
-  M_RST7  = 0xd7,
-  
-  M_SOI   = 0xd8,
-  M_EOI   = 0xd9,
-  M_SOS   = 0xda,
-  M_DQT   = 0xdb,
-  M_DNL   = 0xdc,
-  M_DRI   = 0xdd,
-  M_DHP   = 0xde,
-  M_EXP   = 0xdf,
-  
-  M_APP0  = 0xe0,
-  M_APP1  = 0xe1,
-  M_APP2  = 0xe2,
-  M_APP3  = 0xe3,
-  M_APP4  = 0xe4,
-  M_APP5  = 0xe5,
-  M_APP6  = 0xe6,
-  M_APP7  = 0xe7,
-  M_APP8  = 0xe8,
-  M_APP9  = 0xe9,
-  M_APP10 = 0xea,
-  M_APP11 = 0xeb,
-  M_APP12 = 0xec,
-  M_APP13 = 0xed,
-  M_APP14 = 0xee,
-  M_APP15 = 0xef,
-  
-  M_JPG0  = 0xf0,
-  M_JPG13 = 0xfd,
-  M_COM   = 0xfe,
-  
-  M_TEM   = 0x01,
-  
-  M_ERROR = 0x100
-} JPEG_MARKER;
-
-
-/*
- * Macros for fetching data from the data source module.
- *
- * At all times, cinfo->src->next_input_byte and ->bytes_in_buffer reflect
- * the current restart point; we update them only when we have reached a
- * suitable place to restart if a suspension occurs.
- */
-
-/* Declare and initialize local copies of input pointer/count */
-#define INPUT_VARS(cinfo)  \
-	struct jpeg_source_mgr * datasrc = (cinfo)->src;  \
-	const JOCTET * next_input_byte = datasrc->next_input_byte;  \
-	size_t bytes_in_buffer = datasrc->bytes_in_buffer
-
-/* Unload the local copies --- do this only at a restart boundary */
-#define INPUT_SYNC(cinfo)  \
-	( datasrc->next_input_byte = next_input_byte,  \
-	  datasrc->bytes_in_buffer = bytes_in_buffer )
-
-/* Reload the local copies --- seldom used except in MAKE_BYTE_AVAIL */
-#define INPUT_RELOAD(cinfo)  \
-	( next_input_byte = datasrc->next_input_byte,  \
-	  bytes_in_buffer = datasrc->bytes_in_buffer )
-
-/* Internal macro for INPUT_BYTE and INPUT_2BYTES: make a byte available.
- * Note we do *not* do INPUT_SYNC before calling fill_input_buffer,
- * but we must reload the local copies after a successful fill.
- */
-#define MAKE_BYTE_AVAIL(cinfo,action)  \
-	if (bytes_in_buffer == 0) {  \
-	  if (! (*datasrc->fill_input_buffer) (cinfo))  \
-	    { action; }  \
-	  INPUT_RELOAD(cinfo);  \
-	}  \
-	bytes_in_buffer--
-
-/* Read a byte into variable V.
- * If must suspend, take the specified action (typically "return FALSE").
- */
-#define INPUT_BYTE(cinfo,V,action)  \
-	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
-		  V = GETJOCTET(*next_input_byte++); )
-
-/* As above, but read two bytes interpreted as an unsigned 16-bit integer.
- * V should be declared unsigned int or perhaps INT32.
- */
-#define INPUT_2BYTES(cinfo,V,action)  \
-	MAKESTMT( MAKE_BYTE_AVAIL(cinfo,action); \
-		  V = ((unsigned int) GETJOCTET(*next_input_byte++)) << 8; \
-		  MAKE_BYTE_AVAIL(cinfo,action); \
-		  V += GETJOCTET(*next_input_byte++); )
-
-
-/*
- * Routines to process JPEG markers.
- *
- * Entry condition: JPEG marker itself has been read and its code saved
- *   in cinfo->unread_marker; input restart point is just after the marker.
- *
- * Exit: if return TRUE, have read and processed any parameters, and have
- *   updated the restart point to point after the parameters.
- *   If return FALSE, was forced to suspend before reaching end of
- *   marker parameters; restart point has not been moved.  Same routine
- *   will be called again after application supplies more input data.
- *
- * This approach to suspension assumes that all of a marker's parameters can
- * fit into a single input bufferload.  This should hold for "normal"
- * markers.  Some COM/APPn markers might have large parameter segments,
- * but we use skip_input_data to get past those, and thereby put the problem
- * on the source manager's shoulders.
- *
- * Note that we don't bother to avoid duplicate trace messages if a
- * suspension occurs within marker parameters.  Other side effects
- * require more care.
- */
-
-
-LOCAL(boolean)
-get_soi (j_decompress_ptr cinfo)
-/* Process an SOI marker */
-{
-  int i;
-  
-  TRACEMS(cinfo, 1, JTRC_SOI);
-
-  if (cinfo->marker->saw_SOI)
-    ERREXIT(cinfo, JERR_SOI_DUPLICATE);
-
-  /* Reset all parameters that are defined to be reset by SOI */
-
-  for (i = 0; i < NUM_ARITH_TBLS; i++) {
-    cinfo->arith_dc_L[i] = 0;
-    cinfo->arith_dc_U[i] = 1;
-    cinfo->arith_ac_K[i] = 5;
-  }
-  cinfo->restart_interval = 0;
-
-  /* Set initial assumptions for colorspace etc */
-
-  cinfo->jpeg_color_space = JCS_UNKNOWN;
-  cinfo->CCIR601_sampling = FALSE; /* Assume non-CCIR sampling??? */
-
-  cinfo->saw_JFIF_marker = FALSE;
-  cinfo->density_unit = 0;	/* set default JFIF APP0 values */
-  cinfo->X_density = 1;
-  cinfo->Y_density = 1;
-  cinfo->saw_Adobe_marker = FALSE;
-  cinfo->Adobe_transform = 0;
-
-  cinfo->marker->saw_SOI = TRUE;
-
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_sof (j_decompress_ptr cinfo, boolean is_prog, boolean is_arith)
-/* Process a SOFn marker */
-{
-  INT32 length;
-  int c, ci;
-  jpeg_component_info * compptr;
-  INPUT_VARS(cinfo);
-
-  cinfo->progressive_mode = is_prog;
-  cinfo->arith_code = is_arith;
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-
-  INPUT_BYTE(cinfo, cinfo->data_precision, return FALSE);
-  INPUT_2BYTES(cinfo, cinfo->image_height, return FALSE);
-  INPUT_2BYTES(cinfo, cinfo->image_width, return FALSE);
-  INPUT_BYTE(cinfo, cinfo->num_components, return FALSE);
-
-  length -= 8;
-
-  TRACEMS4(cinfo, 1, JTRC_SOF, cinfo->unread_marker,
-	   (int) cinfo->image_width, (int) cinfo->image_height,
-	   cinfo->num_components);
-
-  if (cinfo->marker->saw_SOF)
-    ERREXIT(cinfo, JERR_SOF_DUPLICATE);
-
-  /* We don't support files in which the image height is initially specified */
-  /* as 0 and is later redefined by DNL.  As long as we have to check that,  */
-  /* might as well have a general sanity check. */
-  if (cinfo->image_height <= 0 || cinfo->image_width <= 0
-      || cinfo->num_components <= 0)
-    ERREXIT(cinfo, JERR_EMPTY_IMAGE);
-
-  if (length != (cinfo->num_components * 3))
-    ERREXIT(cinfo, JERR_BAD_LENGTH);
-
-  if (cinfo->comp_info == NULL)	/* do only once, even if suspend */
-    cinfo->comp_info = (jpeg_component_info *) (*cinfo->mem->alloc_small)
-			((j_common_ptr) cinfo, JPOOL_IMAGE,
-			 cinfo->num_components * SIZEOF(jpeg_component_info));
-  
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    compptr->component_index = ci;
-    INPUT_BYTE(cinfo, compptr->component_id, return FALSE);
-    INPUT_BYTE(cinfo, c, return FALSE);
-    compptr->h_samp_factor = (c >> 4) & 15;
-    compptr->v_samp_factor = (c     ) & 15;
-    INPUT_BYTE(cinfo, compptr->quant_tbl_no, return FALSE);
-
-    TRACEMS4(cinfo, 1, JTRC_SOF_COMPONENT,
-	     compptr->component_id, compptr->h_samp_factor,
-	     compptr->v_samp_factor, compptr->quant_tbl_no);
-  }
-
-  cinfo->marker->saw_SOF = TRUE;
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_sos (j_decompress_ptr cinfo)
-/* Process a SOS marker */
-{
-  INT32 length;
-  int i, ci, n, c, cc;
-  jpeg_component_info * compptr;
-  INPUT_VARS(cinfo);
-
-  if (! cinfo->marker->saw_SOF)
-    ERREXIT(cinfo, JERR_SOS_NO_SOF);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-
-  INPUT_BYTE(cinfo, n, return FALSE); /* Number of components */
-
-  if (length != (n * 2 + 6) || n < 1 || n > MAX_COMPS_IN_SCAN)
-    ERREXIT(cinfo, JERR_BAD_LENGTH);
-
-  TRACEMS1(cinfo, 1, JTRC_SOS, n);
-
-  cinfo->comps_in_scan = n;
-
-  /* Collect the component-spec parameters */
-
-  for (i = 0; i < n; i++) {
-    INPUT_BYTE(cinfo, cc, return FALSE);
-    INPUT_BYTE(cinfo, c, return FALSE);
-    
-    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-	 ci++, compptr++) {
-      if (cc == compptr->component_id)
-	goto id_found;
-    }
-
-    ERREXIT1(cinfo, JERR_BAD_COMPONENT_ID, cc);
-
-  id_found:
-
-    cinfo->cur_comp_info[i] = compptr;
-    compptr->dc_tbl_no = (c >> 4) & 15;
-    compptr->ac_tbl_no = (c     ) & 15;
-    
-    TRACEMS3(cinfo, 1, JTRC_SOS_COMPONENT, cc,
-	     compptr->dc_tbl_no, compptr->ac_tbl_no);
-  }
-
-  /* Collect the additional scan parameters Ss, Se, Ah/Al. */
-  INPUT_BYTE(cinfo, c, return FALSE);
-  cinfo->Ss = c;
-  INPUT_BYTE(cinfo, c, return FALSE);
-  cinfo->Se = c;
-  INPUT_BYTE(cinfo, c, return FALSE);
-  cinfo->Ah = (c >> 4) & 15;
-  cinfo->Al = (c     ) & 15;
-
-  TRACEMS4(cinfo, 1, JTRC_SOS_PARAMS, cinfo->Ss, cinfo->Se,
-	   cinfo->Ah, cinfo->Al);
-
-  /* Prepare to scan data & restart markers */
-  cinfo->marker->next_restart_num = 0;
-
-  /* Count another SOS marker */
-  cinfo->input_scan_number++;
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-METHODDEF(boolean)
-get_app0 (j_decompress_ptr cinfo)
-/* Process an APP0 marker */
-{
-#define JFIF_LEN 14
-  INT32 length;
-  UINT8 b[JFIF_LEN];
-  int buffp;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-
-  /* See if a JFIF APP0 marker is present */
-
-  if (length >= JFIF_LEN) {
-    for (buffp = 0; buffp < JFIF_LEN; buffp++)
-      INPUT_BYTE(cinfo, b[buffp], return FALSE);
-    length -= JFIF_LEN;
-
-    if (b[0]==0x4A && b[1]==0x46 && b[2]==0x49 && b[3]==0x46 && b[4]==0) {
-      /* Found JFIF APP0 marker: check version */
-      /* Major version must be 1, anything else signals an incompatible change.
-       * We used to treat this as an error, but now it's a nonfatal warning,
-       * because some bozo at Hijaak couldn't read the spec.
-       * Minor version should be 0..2, but process anyway if newer.
-       */
-      if (b[5] != 1)
-	WARNMS2(cinfo, JWRN_JFIF_MAJOR, b[5], b[6]);
-      else if (b[6] > 2)
-	TRACEMS2(cinfo, 1, JTRC_JFIF_MINOR, b[5], b[6]);
-      /* Save info */
-      cinfo->saw_JFIF_marker = TRUE;
-      cinfo->density_unit = b[7];
-      cinfo->X_density = (b[8] << 8) + b[9];
-      cinfo->Y_density = (b[10] << 8) + b[11];
-      TRACEMS3(cinfo, 1, JTRC_JFIF,
-	       cinfo->X_density, cinfo->Y_density, cinfo->density_unit);
-      if (b[12] | b[13])
-	TRACEMS2(cinfo, 1, JTRC_JFIF_THUMBNAIL, b[12], b[13]);
-      if (length != ((INT32) b[12] * (INT32) b[13] * (INT32) 3))
-	TRACEMS1(cinfo, 1, JTRC_JFIF_BADTHUMBNAILSIZE, (int) length);
-    } else {
-      /* Start of APP0 does not match "JFIF" */
-      TRACEMS1(cinfo, 1, JTRC_APP0, (int) length + JFIF_LEN);
-    }
-  } else {
-    /* Too short to be JFIF marker */
-    TRACEMS1(cinfo, 1, JTRC_APP0, (int) length);
-  }
-
-  INPUT_SYNC(cinfo);
-  if (length > 0)		/* skip any remaining data -- could be lots */
-    (*cinfo->src->skip_input_data) (cinfo, (long) length);
-
-  return TRUE;
-}
-
-
-METHODDEF(boolean)
-get_app14 (j_decompress_ptr cinfo)
-/* Process an APP14 marker */
-{
-#define ADOBE_LEN 12
-  INT32 length;
-  UINT8 b[ADOBE_LEN];
-  int buffp;
-  unsigned int version, flags0, flags1, transform;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-
-  /* See if an Adobe APP14 marker is present */
-
-  if (length >= ADOBE_LEN) {
-    for (buffp = 0; buffp < ADOBE_LEN; buffp++)
-      INPUT_BYTE(cinfo, b[buffp], return FALSE);
-    length -= ADOBE_LEN;
-
-    if (b[0]==0x41 && b[1]==0x64 && b[2]==0x6F && b[3]==0x62 && b[4]==0x65) {
-      /* Found Adobe APP14 marker */
-      version = (b[5] << 8) + b[6];
-      flags0 = (b[7] << 8) + b[8];
-      flags1 = (b[9] << 8) + b[10];
-      transform = b[11];
-      TRACEMS4(cinfo, 1, JTRC_ADOBE, version, flags0, flags1, transform);
-      cinfo->saw_Adobe_marker = TRUE;
-      cinfo->Adobe_transform = (UINT8) transform;
-    } else {
-      /* Start of APP14 does not match "Adobe" */
-      TRACEMS1(cinfo, 1, JTRC_APP14, (int) length + ADOBE_LEN);
-    }
-  } else {
-    /* Too short to be Adobe marker */
-    TRACEMS1(cinfo, 1, JTRC_APP14, (int) length);
-  }
-
-  INPUT_SYNC(cinfo);
-  if (length > 0)		/* skip any remaining data -- could be lots */
-    (*cinfo->src->skip_input_data) (cinfo, (long) length);
-
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_dac (j_decompress_ptr cinfo)
-/* Process a DAC marker */
-{
-  INT32 length;
-  int index, val;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-  
-  while (length > 0) {
-    INPUT_BYTE(cinfo, index, return FALSE);
-    INPUT_BYTE(cinfo, val, return FALSE);
-
-    length -= 2;
-
-    TRACEMS2(cinfo, 1, JTRC_DAC, index, val);
-
-    if (index < 0 || index >= (2*NUM_ARITH_TBLS))
-      ERREXIT1(cinfo, JERR_DAC_INDEX, index);
-
-    if (index >= NUM_ARITH_TBLS) { /* define AC table */
-      cinfo->arith_ac_K[index-NUM_ARITH_TBLS] = (UINT8) val;
-    } else {			/* define DC table */
-      cinfo->arith_dc_L[index] = (UINT8) (val & 0x0F);
-      cinfo->arith_dc_U[index] = (UINT8) (val >> 4);
-      if (cinfo->arith_dc_L[index] > cinfo->arith_dc_U[index])
-	ERREXIT1(cinfo, JERR_DAC_VALUE, val);
-    }
-  }
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_dht (j_decompress_ptr cinfo)
-/* Process a DHT marker */
-{
-  INT32 length;
-  UINT8 bits[17];
-  UINT8 huffval[256];
-  int i, index, count;
-  JHUFF_TBL **htblptr;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-  
-  while (length > 0) {
-    INPUT_BYTE(cinfo, index, return FALSE);
-
-    TRACEMS1(cinfo, 1, JTRC_DHT, index);
-      
-    bits[0] = 0;
-    count = 0;
-    for (i = 1; i <= 16; i++) {
-      INPUT_BYTE(cinfo, bits[i], return FALSE);
-      count += bits[i];
-    }
-
-    length -= 1 + 16;
-
-    TRACEMS8(cinfo, 2, JTRC_HUFFBITS,
-	     bits[1], bits[2], bits[3], bits[4],
-	     bits[5], bits[6], bits[7], bits[8]);
-    TRACEMS8(cinfo, 2, JTRC_HUFFBITS,
-	     bits[9], bits[10], bits[11], bits[12],
-	     bits[13], bits[14], bits[15], bits[16]);
-
-    if (count > 256 || ((INT32) count) > length)
-      ERREXIT(cinfo, JERR_DHT_COUNTS);
-
-    for (i = 0; i < count; i++)
-      INPUT_BYTE(cinfo, huffval[i], return FALSE);
-
-    length -= count;
-
-    if (index & 0x10) {		/* AC table definition */
-      index -= 0x10;
-      htblptr = &cinfo->ac_huff_tbl_ptrs[index];
-    } else {			/* DC table definition */
-      htblptr = &cinfo->dc_huff_tbl_ptrs[index];
-    }
-
-    if (index < 0 || index >= NUM_HUFF_TBLS)
-      ERREXIT1(cinfo, JERR_DHT_INDEX, index);
-
-    if (*htblptr == NULL)
-      *htblptr = jpeg_alloc_huff_table((j_common_ptr) cinfo);
-  
-    MEMCOPY((*htblptr)->bits, bits, SIZEOF((*htblptr)->bits));
-    MEMCOPY((*htblptr)->huffval, huffval, SIZEOF((*htblptr)->huffval));
-  }
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_dqt (j_decompress_ptr cinfo)
-/* Process a DQT marker */
-{
-  INT32 length;
-  int n, i, prec;
-  unsigned int tmp;
-  JQUANT_TBL *quant_ptr;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  length -= 2;
-
-  while (length > 0) {
-    INPUT_BYTE(cinfo, n, return FALSE);
-    prec = n >> 4;
-    n &= 0x0F;
-
-    TRACEMS2(cinfo, 1, JTRC_DQT, n, prec);
-
-    if (n >= NUM_QUANT_TBLS)
-      ERREXIT1(cinfo, JERR_DQT_INDEX, n);
-      
-    if (cinfo->quant_tbl_ptrs[n] == NULL)
-      cinfo->quant_tbl_ptrs[n] = jpeg_alloc_quant_table((j_common_ptr) cinfo);
-    quant_ptr = cinfo->quant_tbl_ptrs[n];
-
-    for (i = 0; i < DCTSIZE2; i++) {
-      if (prec)
-	INPUT_2BYTES(cinfo, tmp, return FALSE);
-      else
-	INPUT_BYTE(cinfo, tmp, return FALSE);
-      /* We convert the zigzag-order table to natural array order. */
-      quant_ptr->quantval[jpeg_natural_order[i]] = (UINT16) tmp;
-    }
-
-    if (cinfo->err->trace_level >= 2) {
-      for (i = 0; i < DCTSIZE2; i += 8) {
-	TRACEMS8(cinfo, 2, JTRC_QUANTVALS,
-		 quant_ptr->quantval[i],   quant_ptr->quantval[i+1],
-		 quant_ptr->quantval[i+2], quant_ptr->quantval[i+3],
-		 quant_ptr->quantval[i+4], quant_ptr->quantval[i+5],
-		 quant_ptr->quantval[i+6], quant_ptr->quantval[i+7]);
-      }
-    }
-
-    length -= DCTSIZE2+1;
-    if (prec) length -= DCTSIZE2;
-  }
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-get_dri (j_decompress_ptr cinfo)
-/* Process a DRI marker */
-{
-  INT32 length;
-  unsigned int tmp;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  
-  if (length != 4)
-    ERREXIT(cinfo, JERR_BAD_LENGTH);
-
-  INPUT_2BYTES(cinfo, tmp, return FALSE);
-
-  TRACEMS1(cinfo, 1, JTRC_DRI, tmp);
-
-  cinfo->restart_interval = tmp;
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-METHODDEF(boolean)
-skip_variable (j_decompress_ptr cinfo)
-/* Skip over an unknown or uninteresting variable-length marker */
-{
-  INT32 length;
-  INPUT_VARS(cinfo);
-
-  INPUT_2BYTES(cinfo, length, return FALSE);
-  
-  TRACEMS2(cinfo, 1, JTRC_MISC_MARKER, cinfo->unread_marker, (int) length);
-
-  INPUT_SYNC(cinfo);		/* do before skip_input_data */
-  (*cinfo->src->skip_input_data) (cinfo, (long) length - 2L);
-
-  return TRUE;
-}
-
-
-/*
- * Find the next JPEG marker, save it in cinfo->unread_marker.
- * Returns FALSE if had to suspend before reaching a marker;
- * in that case cinfo->unread_marker is unchanged.
- *
- * Note that the result might not be a valid marker code,
- * but it will never be 0 or FF.
- */
-
-LOCAL(boolean)
-next_marker (j_decompress_ptr cinfo)
-{
-  int c;
-  INPUT_VARS(cinfo);
-
-  for (;;) {
-    INPUT_BYTE(cinfo, c, return FALSE);
-    /* Skip any non-FF bytes.
-     * This may look a bit inefficient, but it will not occur in a valid file.
-     * We sync after each discarded byte so that a suspending data source
-     * can discard the byte from its buffer.
-     */
-    while (c != 0xFF) {
-      cinfo->marker->discarded_bytes++;
-      INPUT_SYNC(cinfo);
-      INPUT_BYTE(cinfo, c, return FALSE);
-    }
-    /* This loop swallows any duplicate FF bytes.  Extra FFs are legal as
-     * pad bytes, so don't count them in discarded_bytes.  We assume there
-     * will not be so many consecutive FF bytes as to overflow a suspending
-     * data source's input buffer.
-     */
-    do {
-      INPUT_BYTE(cinfo, c, return FALSE);
-    } while (c == 0xFF);
-    if (c != 0)
-      break;			/* found a valid marker, exit loop */
-    /* Reach here if we found a stuffed-zero data sequence (FF/00).
-     * Discard it and loop back to try again.
-     */
-    cinfo->marker->discarded_bytes += 2;
-    INPUT_SYNC(cinfo);
-  }
-
-  if (cinfo->marker->discarded_bytes != 0) {
-    WARNMS2(cinfo, JWRN_EXTRANEOUS_DATA, cinfo->marker->discarded_bytes, c);
-    cinfo->marker->discarded_bytes = 0;
-  }
-
-  cinfo->unread_marker = c;
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-LOCAL(boolean)
-first_marker (j_decompress_ptr cinfo)
-/* Like next_marker, but used to obtain the initial SOI marker. */
-/* For this marker, we do not allow preceding garbage or fill; otherwise,
- * we might well scan an entire input file before realizing it ain't JPEG.
- * If an application wants to process non-JFIF files, it must seek to the
- * SOI before calling the JPEG library.
- */
-{
-  int c, c2;
-  INPUT_VARS(cinfo);
-
-  INPUT_BYTE(cinfo, c, return FALSE);
-  INPUT_BYTE(cinfo, c2, return FALSE);
-  if (c != 0xFF || c2 != (int) M_SOI)
-    ERREXIT2(cinfo, JERR_NO_SOI, c, c2);
-
-  cinfo->unread_marker = c2;
-
-  INPUT_SYNC(cinfo);
-  return TRUE;
-}
-
-
-/*
- * Read markers until SOS or EOI.
- *
- * Returns same codes as are defined for jpeg_consume_input:
- * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
- */
-
-METHODDEF(int)
-read_markers (j_decompress_ptr cinfo)
-{
-  /* Outer loop repeats once for each marker. */
-  for (;;) {
-    /* Collect the marker proper, unless we already did. */
-    /* NB: first_marker() enforces the requirement that SOI appear first. */
-    if (cinfo->unread_marker == 0) {
-      if (! cinfo->marker->saw_SOI) {
-	if (! first_marker(cinfo))
-	  return JPEG_SUSPENDED;
-      } else {
-	if (! next_marker(cinfo))
-	  return JPEG_SUSPENDED;
-      }
-    }
-    /* At this point cinfo->unread_marker contains the marker code and the
-     * input point is just past the marker proper, but before any parameters.
-     * A suspension will cause us to return with this state still true.
-     */
-    switch (cinfo->unread_marker) {
-    case M_SOI:
-      if (! get_soi(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-
-    case M_SOF0:		/* Baseline */
-    case M_SOF1:		/* Extended sequential, Huffman */
-      if (! get_sof(cinfo, FALSE, FALSE))
-	return JPEG_SUSPENDED;
-      break;
-
-    case M_SOF2:		/* Progressive, Huffman */
-      if (! get_sof(cinfo, TRUE, FALSE))
-	return JPEG_SUSPENDED;
-      break;
-
-    case M_SOF9:		/* Extended sequential, arithmetic */
-      if (! get_sof(cinfo, FALSE, TRUE))
-	return JPEG_SUSPENDED;
-      break;
-
-    case M_SOF10:		/* Progressive, arithmetic */
-      if (! get_sof(cinfo, TRUE, TRUE))
-	return JPEG_SUSPENDED;
-      break;
-
-    /* Currently unsupported SOFn types */
-    case M_SOF3:		/* Lossless, Huffman */
-    case M_SOF5:		/* Differential sequential, Huffman */
-    case M_SOF6:		/* Differential progressive, Huffman */
-    case M_SOF7:		/* Differential lossless, Huffman */
-    case M_JPG:			/* Reserved for JPEG extensions */
-    case M_SOF11:		/* Lossless, arithmetic */
-    case M_SOF13:		/* Differential sequential, arithmetic */
-    case M_SOF14:		/* Differential progressive, arithmetic */
-    case M_SOF15:		/* Differential lossless, arithmetic */
-      ERREXIT1(cinfo, JERR_SOF_UNSUPPORTED, cinfo->unread_marker);
-      break;
-
-    case M_SOS:
-      if (! get_sos(cinfo))
-	return JPEG_SUSPENDED;
-      cinfo->unread_marker = 0;	/* processed the marker */
-      return JPEG_REACHED_SOS;
-    
-    case M_EOI:
-      TRACEMS(cinfo, 1, JTRC_EOI);
-      cinfo->unread_marker = 0;	/* processed the marker */
-      return JPEG_REACHED_EOI;
-      
-    case M_DAC:
-      if (! get_dac(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-      
-    case M_DHT:
-      if (! get_dht(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-      
-    case M_DQT:
-      if (! get_dqt(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-      
-    case M_DRI:
-      if (! get_dri(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-      
-    case M_APP0:
-    case M_APP1:
-    case M_APP2:
-    case M_APP3:
-    case M_APP4:
-    case M_APP5:
-    case M_APP6:
-    case M_APP7:
-    case M_APP8:
-    case M_APP9:
-    case M_APP10:
-    case M_APP11:
-    case M_APP12:
-    case M_APP13:
-    case M_APP14:
-    case M_APP15:
-      if (! (*cinfo->marker->process_APPn[cinfo->unread_marker - (int) M_APP0]) (cinfo))
-	return JPEG_SUSPENDED;
-      break;
-      
-    case M_COM:
-      if (! (*cinfo->marker->process_COM) (cinfo))
-	return JPEG_SUSPENDED;
-      break;
-
-    case M_RST0:		/* these are all parameterless */
-    case M_RST1:
-    case M_RST2:
-    case M_RST3:
-    case M_RST4:
-    case M_RST5:
-    case M_RST6:
-    case M_RST7:
-    case M_TEM:
-      TRACEMS1(cinfo, 1, JTRC_PARMLESS_MARKER, cinfo->unread_marker);
-      break;
-
-    case M_DNL:			/* Ignore DNL ... perhaps the wrong thing */
-      if (! skip_variable(cinfo))
-	return JPEG_SUSPENDED;
-      break;
-
-    default:			/* must be DHP, EXP, JPGn, or RESn */
-      /* For now, we treat the reserved markers as fatal errors since they are
-       * likely to be used to signal incompatible JPEG Part 3 extensions.
-       * Once the JPEG 3 version-number marker is well defined, this code
-       * ought to change!
-       */
-      ERREXIT1(cinfo, JERR_UNKNOWN_MARKER, cinfo->unread_marker);
-      break;
-    }
-    /* Successfully processed marker, so reset state variable */
-    cinfo->unread_marker = 0;
-  } /* end loop */
-}
-
-
-/*
- * Read a restart marker, which is expected to appear next in the datastream;
- * if the marker is not there, take appropriate recovery action.
- * Returns FALSE if suspension is required.
- *
- * This is called by the entropy decoder after it has read an appropriate
- * number of MCUs.  cinfo->unread_marker may be nonzero if the entropy decoder
- * has already read a marker from the data source.  Under normal conditions
- * cinfo->unread_marker will be reset to 0 before returning; if not reset,
- * it holds a marker which the decoder will be unable to read past.
- */
-
-METHODDEF(boolean)
-read_restart_marker (j_decompress_ptr cinfo)
-{
-  /* Obtain a marker unless we already did. */
-  /* Note that next_marker will complain if it skips any data. */
-  if (cinfo->unread_marker == 0) {
-    if (! next_marker(cinfo))
-      return FALSE;
-  }
-
-  if (cinfo->unread_marker ==
-      ((int) M_RST0 + cinfo->marker->next_restart_num)) {
-    /* Normal case --- swallow the marker and let entropy decoder continue */
-    TRACEMS1(cinfo, 3, JTRC_RST, cinfo->marker->next_restart_num);
-    cinfo->unread_marker = 0;
-  } else {
-    /* Uh-oh, the restart markers have been messed up. */
-    /* Let the data source manager determine how to resync. */
-    if (! (*cinfo->src->resync_to_restart) (cinfo,
-					    cinfo->marker->next_restart_num))
-      return FALSE;
-  }
-
-  /* Update next-restart state */
-  cinfo->marker->next_restart_num = (cinfo->marker->next_restart_num + 1) & 7;
-
-  return TRUE;
-}
-
-
-/*
- * This is the default resync_to_restart method for data source managers
- * to use if they don't have any better approach.  Some data source managers
- * may be able to back up, or may have additional knowledge about the data
- * which permits a more intelligent recovery strategy; such managers would
- * presumably supply their own resync method.
- *
- * read_restart_marker calls resync_to_restart if it finds a marker other than
- * the restart marker it was expecting.  (This code is *not* used unless
- * a nonzero restart interval has been declared.)  cinfo->unread_marker is
- * the marker code actually found (might be anything, except 0 or FF).
- * The desired restart marker number (0..7) is passed as a parameter.
- * This routine is supposed to apply whatever error recovery strategy seems
- * appropriate in order to position the input stream to the next data segment.
- * Note that cinfo->unread_marker is treated as a marker appearing before
- * the current data-source input point; usually it should be reset to zero
- * before returning.
- * Returns FALSE if suspension is required.
- *
- * This implementation is substantially constrained by wanting to treat the
- * input as a data stream; this means we can't back up.  Therefore, we have
- * only the following actions to work with:
- *   1. Simply discard the marker and let the entropy decoder resume at next
- *      byte of file.
- *   2. Read forward until we find another marker, discarding intervening
- *      data.  (In theory we could look ahead within the current bufferload,
- *      without having to discard data if we don't find the desired marker.
- *      This idea is not implemented here, in part because it makes behavior
- *      dependent on buffer size and chance buffer-boundary positions.)
- *   3. Leave the marker unread (by failing to zero cinfo->unread_marker).
- *      This will cause the entropy decoder to process an empty data segment,
- *      inserting dummy zeroes, and then we will reprocess the marker.
- *
- * #2 is appropriate if we think the desired marker lies ahead, while #3 is
- * appropriate if the found marker is a future restart marker (indicating
- * that we have missed the desired restart marker, probably because it got
- * corrupted).
- * We apply #2 or #3 if the found marker is a restart marker no more than
- * two counts behind or ahead of the expected one.  We also apply #2 if the
- * found marker is not a legal JPEG marker code (it's certainly bogus data).
- * If the found marker is a restart marker more than 2 counts away, we do #1
- * (too much risk that the marker is erroneous; with luck we will be able to
- * resync at some future point).
- * For any valid non-restart JPEG marker, we apply #3.  This keeps us from
- * overrunning the end of a scan.  An implementation limited to single-scan
- * files might find it better to apply #2 for markers other than EOI, since
- * any other marker would have to be bogus data in that case.
- */
-
-GLOBAL(boolean)
-jpeg_resync_to_restart (j_decompress_ptr cinfo, int desired)
-{
-  int marker = cinfo->unread_marker;
-  int action = 1;
-  
-  /* Always put up a warning. */
-  WARNMS2(cinfo, JWRN_MUST_RESYNC, marker, desired);
-  
-  /* Outer loop handles repeated decision after scanning forward. */
-  for (;;) {
-    if (marker < (int) M_SOF0)
-      action = 2;		/* invalid marker */
-    else if (marker < (int) M_RST0 || marker > (int) M_RST7)
-      action = 3;		/* valid non-restart marker */
-    else {
-      if (marker == ((int) M_RST0 + ((desired+1) & 7)) ||
-	  marker == ((int) M_RST0 + ((desired+2) & 7)))
-	action = 3;		/* one of the next two expected restarts */
-      else if (marker == ((int) M_RST0 + ((desired-1) & 7)) ||
-	       marker == ((int) M_RST0 + ((desired-2) & 7)))
-	action = 2;		/* a prior restart, so advance */
-      else
-	action = 1;		/* desired restart or too far away */
-    }
-    TRACEMS2(cinfo, 4, JTRC_RECOVERY_ACTION, marker, action);
-    switch (action) {
-    case 1:
-      /* Discard marker and let entropy decoder resume processing. */
-      cinfo->unread_marker = 0;
-      return TRUE;
-    case 2:
-      /* Scan to the next marker, and repeat the decision loop. */
-      if (! next_marker(cinfo))
-	return FALSE;
-      marker = cinfo->unread_marker;
-      break;
-    case 3:
-      /* Return without advancing past this marker. */
-      /* Entropy decoder will be forced to process an empty segment. */
-      return TRUE;
-    }
-  } /* end loop */
-}
-
-
-/*
- * Reset marker processing state to begin a fresh datastream.
- */
-
-METHODDEF(void)
-reset_marker_reader (j_decompress_ptr cinfo)
-{
-  cinfo->comp_info = NULL;		/* until allocated by get_sof */
-  cinfo->input_scan_number = 0;		/* no SOS seen yet */
-  cinfo->unread_marker = 0;		/* no pending marker */
-  cinfo->marker->saw_SOI = FALSE;	/* set internal state too */
-  cinfo->marker->saw_SOF = FALSE;
-  cinfo->marker->discarded_bytes = 0;
-}
-
-
-/*
- * Initialize the marker reader module.
- * This is called only once, when the decompression object is created.
- */
-
-GLOBAL(void)
-jinit_marker_reader (j_decompress_ptr cinfo)
-{
-  int i;
-
-  /* Create subobject in permanent pool */
-  cinfo->marker = (struct jpeg_marker_reader *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_PERMANENT,
-				SIZEOF(struct jpeg_marker_reader));
-  /* Initialize method pointers */
-  cinfo->marker->reset_marker_reader = reset_marker_reader;
-  cinfo->marker->read_markers = read_markers;
-  cinfo->marker->read_restart_marker = read_restart_marker;
-  cinfo->marker->process_COM = skip_variable;
-  for (i = 0; i < 16; i++)
-    cinfo->marker->process_APPn[i] = skip_variable;
-  cinfo->marker->process_APPn[0] = get_app0;
-  cinfo->marker->process_APPn[14] = get_app14;
-  /* Reset marker processing state */
-  reset_marker_reader(cinfo);
-}

cde/lib/DtHelp/jpeg/jdmaster.c

@@ -1,578 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdmaster.c /main/2 1996/05/09 03:48:58 drk $ */
-/*
- * jdmaster.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains master control logic for the JPEG decompressor.
- * These routines are concerned with selecting the modules to be executed
- * and with determining the number of passes and the work to be done in each
- * pass.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Private state */
-
-typedef struct {
-  struct jpeg_decomp_master pub; /* public fields */
-
-  int pass_number;		/* # of passes completed */
-
-  boolean using_merged_upsample; /* TRUE if using merged upsample/cconvert */
-
-  /* Saved references to initialized quantizer modules,
-   * in case we need to switch modes.
-   */
-  struct jpeg_color_quantizer * quantizer_1pass;
-  struct jpeg_color_quantizer * quantizer_2pass;
-} my_decomp_master;
-
-typedef my_decomp_master * my_master_ptr;
-
-
-/*
- * Determine whether merged upsample/color conversion should be used.
- * CRUCIAL: this must match the actual capabilities of jdmerge.c!
- */
-
-LOCAL(boolean)
-use_merged_upsample (j_decompress_ptr cinfo)
-{
-#ifdef UPSAMPLE_MERGING_SUPPORTED
-  /* Merging is the equivalent of plain box-filter upsampling */
-  if (cinfo->do_fancy_upsampling || cinfo->CCIR601_sampling)
-    return FALSE;
-  /* jdmerge.c only supports YCC=>RGB color conversion */
-  if (cinfo->jpeg_color_space != JCS_YCbCr || cinfo->num_components != 3 ||
-      cinfo->out_color_space != JCS_RGB ||
-      cinfo->out_color_components != RGB_PIXELSIZE)
-    return FALSE;
-  /* and it only handles 2h1v or 2h2v sampling ratios */
-  if (cinfo->comp_info[0].h_samp_factor != 2 ||
-      cinfo->comp_info[1].h_samp_factor != 1 ||
-      cinfo->comp_info[2].h_samp_factor != 1 ||
-      cinfo->comp_info[0].v_samp_factor >  2 ||
-      cinfo->comp_info[1].v_samp_factor != 1 ||
-      cinfo->comp_info[2].v_samp_factor != 1)
-    return FALSE;
-  /* furthermore, it doesn't work if we've scaled the IDCTs differently */
-  if (cinfo->comp_info[0].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
-      cinfo->comp_info[1].DCT_scaled_size != cinfo->min_DCT_scaled_size ||
-      cinfo->comp_info[2].DCT_scaled_size != cinfo->min_DCT_scaled_size)
-    return FALSE;
-  /* ??? also need to test for upsample-time rescaling, when & if supported */
-  return TRUE;			/* by golly, it'll work... */
-#else
-  return FALSE;
-#endif
-}
-
-
-/*
- * Compute output image dimensions and related values.
- * NOTE: this is exported for possible use by application.
- * Hence it mustn't do anything that can't be done twice.
- * Also note that it may be called before the master module is initialized!
- */
-
-GLOBAL(void)
-jpeg_calc_output_dimensions (j_decompress_ptr cinfo)
-/* Do computations that are needed before master selection phase */
-{
-  int ci;
-  jpeg_component_info *compptr;
-
-  /* Prevent application from calling me at wrong times */
-  if (cinfo->global_state != DSTATE_READY)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-
-#ifdef IDCT_SCALING_SUPPORTED
-
-  /* Compute actual output image dimensions and DCT scaling choices. */
-  if (cinfo->scale_num * 8 <= cinfo->scale_denom) {
-    /* Provide 1/8 scaling */
-    cinfo->output_width = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width, 8L);
-    cinfo->output_height = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height, 8L);
-    cinfo->min_DCT_scaled_size = 1;
-  } else if (cinfo->scale_num * 4 <= cinfo->scale_denom) {
-    /* Provide 1/4 scaling */
-    cinfo->output_width = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width, 4L);
-    cinfo->output_height = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height, 4L);
-    cinfo->min_DCT_scaled_size = 2;
-  } else if (cinfo->scale_num * 2 <= cinfo->scale_denom) {
-    /* Provide 1/2 scaling */
-    cinfo->output_width = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width, 2L);
-    cinfo->output_height = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height, 2L);
-    cinfo->min_DCT_scaled_size = 4;
-  } else {
-    /* Provide 1/1 scaling */
-    cinfo->output_width = cinfo->image_width;
-    cinfo->output_height = cinfo->image_height;
-    cinfo->min_DCT_scaled_size = DCTSIZE;
-  }
-  /* In selecting the actual DCT scaling for each component, we try to
-   * scale up the chroma components via IDCT scaling rather than upsampling.
-   * This saves time if the upsampler gets to use 1:1 scaling.
-   * Note this code assumes that the supported DCT scalings are powers of 2.
-   */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    int ssize = cinfo->min_DCT_scaled_size;
-    while (ssize < DCTSIZE &&
-	   (compptr->h_samp_factor * ssize * 2 <=
-	    cinfo->max_h_samp_factor * cinfo->min_DCT_scaled_size) &&
-	   (compptr->v_samp_factor * ssize * 2 <=
-	    cinfo->max_v_samp_factor * cinfo->min_DCT_scaled_size)) {
-      ssize = ssize * 2;
-    }
-    compptr->DCT_scaled_size = ssize;
-  }
-
-  /* Recompute downsampled dimensions of components;
-   * application needs to know these if using raw downsampled data.
-   */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Size in samples, after IDCT scaling */
-    compptr->downsampled_width = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_width *
-		    (long) (compptr->h_samp_factor * compptr->DCT_scaled_size),
-		    (long) (cinfo->max_h_samp_factor * DCTSIZE));
-    compptr->downsampled_height = (JDIMENSION)
-      jdiv_round_up((long) cinfo->image_height *
-		    (long) (compptr->v_samp_factor * compptr->DCT_scaled_size),
-		    (long) (cinfo->max_v_samp_factor * DCTSIZE));
-  }
-
-#else /* !IDCT_SCALING_SUPPORTED */
-
-  /* Hardwire it to "no scaling" */
-  cinfo->output_width = cinfo->image_width;
-  cinfo->output_height = cinfo->image_height;
-  /* jdinput.c has already initialized DCT_scaled_size to DCTSIZE,
-   * and has computed unscaled downsampled_width and downsampled_height.
-   */
-
-#endif /* IDCT_SCALING_SUPPORTED */
-
-  /* Report number of components in selected colorspace. */
-  /* Probably this should be in the color conversion module... */
-  switch (cinfo->out_color_space) {
-  case JCS_GRAYSCALE:
-    cinfo->out_color_components = 1;
-    break;
-  case JCS_RGB:
-#if RGB_PIXELSIZE != 3
-    cinfo->out_color_components = RGB_PIXELSIZE;
-    break;
-#endif /* else share code with YCbCr */
-  case JCS_YCbCr:
-    cinfo->out_color_components = 3;
-    break;
-  case JCS_CMYK:
-  case JCS_YCCK:
-    cinfo->out_color_components = 4;
-    break;
-  default:			/* else must be same colorspace as in file */
-    cinfo->out_color_components = cinfo->num_components;
-    break;
-  }
-  cinfo->output_components = (cinfo->quantize_colors ? 1 :
-			      cinfo->out_color_components);
-
-  /* See if upsampler will want to emit more than one row at a time */
-  if (use_merged_upsample(cinfo))
-    cinfo->rec_outbuf_height = cinfo->max_v_samp_factor;
-  else
-    cinfo->rec_outbuf_height = 1;
-}
-
-
-/*
- * Several decompression processes need to range-limit values to the range
- * 0..MAXJSAMPLE; the input value may fall somewhat outside this range
- * due to noise introduced by quantization, roundoff error, etc.  These
- * processes are inner loops and need to be as fast as possible.  On most
- * machines, particularly CPUs with pipelines or instruction prefetch,
- * a (subscript-check-less) C table lookup
- *		x = sample_range_limit[x];
- * is faster than explicit tests
- *		if (x < 0)  x = 0;
- *		else if (x > MAXJSAMPLE)  x = MAXJSAMPLE;
- * These processes all use a common table prepared by the routine below.
- *
- * For most steps we can mathematically guarantee that the initial value
- * of x is within MAXJSAMPLE+1 of the legal range, so a table running from
- * -(MAXJSAMPLE+1) to 2*MAXJSAMPLE+1 is sufficient.  But for the initial
- * limiting step (just after the IDCT), a wildly out-of-range value is 
- * possible if the input data is corrupt.  To avoid any chance of indexing
- * off the end of memory and getting a bad-pointer trap, we perform the
- * post-IDCT limiting thus:
- *		x = range_limit[x & MASK];
- * where MASK is 2 bits wider than legal sample data, ie 10 bits for 8-bit
- * samples.  Under normal circumstances this is more than enough range and
- * a correct output will be generated; with bogus input data the mask will
- * cause wraparound, and we will safely generate a bogus-but-in-range output.
- * For the post-IDCT step, we want to convert the data from signed to unsigned
- * representation by adding CENTERJSAMPLE at the same time that we limit it.
- * So the post-IDCT limiting table ends up looking like this:
- *   CENTERJSAMPLE,CENTERJSAMPLE+1,...,MAXJSAMPLE,
- *   MAXJSAMPLE (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
- *   0          (repeat 2*(MAXJSAMPLE+1)-CENTERJSAMPLE times),
- *   0,1,...,CENTERJSAMPLE-1
- * Negative inputs select values from the upper half of the table after
- * masking.
- *
- * We can save some space by overlapping the start of the post-IDCT table
- * with the simpler range limiting table.  The post-IDCT table begins at
- * sample_range_limit + CENTERJSAMPLE.
- *
- * Note that the table is allocated in near data space on PCs; it's small
- * enough and used often enough to justify this.
- */
-
-LOCAL(void)
-prepare_range_limit_table (j_decompress_ptr cinfo)
-/* Allocate and fill in the sample_range_limit table */
-{
-  JSAMPLE * table;
-  int i;
-
-  table = (JSAMPLE *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-		(5 * (MAXJSAMPLE+1) + CENTERJSAMPLE) * SIZEOF(JSAMPLE));
-  table += (MAXJSAMPLE+1);	/* allow negative subscripts of simple table */
-  cinfo->sample_range_limit = table;
-  /* First segment of "simple" table: limit[x] = 0 for x < 0 */
-  MEMZERO(table - (MAXJSAMPLE+1), (MAXJSAMPLE+1) * SIZEOF(JSAMPLE));
-  /* Main part of "simple" table: limit[x] = x */
-  for (i = 0; i <= MAXJSAMPLE; i++)
-    table[i] = (JSAMPLE) i;
-  table += CENTERJSAMPLE;	/* Point to where post-IDCT table starts */
-  /* End of simple table, rest of first half of post-IDCT table */
-  for (i = CENTERJSAMPLE; i < 2*(MAXJSAMPLE+1); i++)
-    table[i] = MAXJSAMPLE;
-  /* Second half of post-IDCT table */
-  MEMZERO(table + (2 * (MAXJSAMPLE+1)),
-	  (2 * (MAXJSAMPLE+1) - CENTERJSAMPLE) * SIZEOF(JSAMPLE));
-  MEMCOPY(table + (4 * (MAXJSAMPLE+1) - CENTERJSAMPLE),
-	  cinfo->sample_range_limit, CENTERJSAMPLE * SIZEOF(JSAMPLE));
-}
-
-
-/*
- * Master selection of decompression modules.
- * This is done once at jpeg_start_decompress time.  We determine
- * which modules will be used and give them appropriate initialization calls.
- * We also initialize the decompressor input side to begin consuming data.
- *
- * Since jpeg_read_header has finished, we know what is in the SOF
- * and (first) SOS markers.  We also have all the application parameter
- * settings.
- */
-
-LOCAL(void)
-master_selection (j_decompress_ptr cinfo)
-{
-  my_master_ptr master = (my_master_ptr) cinfo->master;
-  boolean use_c_buffer;
-  long samplesperrow;
-  JDIMENSION jd_samplesperrow;
-
-  /* Initialize dimensions and other stuff */
-  jpeg_calc_output_dimensions(cinfo);
-  prepare_range_limit_table(cinfo);
-
-  /* Width of an output scanline must be representable as JDIMENSION. */
-  samplesperrow = (long) cinfo->output_width * (long) cinfo->out_color_components;
-  jd_samplesperrow = (JDIMENSION) samplesperrow;
-  if ((long) jd_samplesperrow != samplesperrow)
-    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
-
-  /* Initialize my private state */
-  master->pass_number = 0;
-  master->using_merged_upsample = use_merged_upsample(cinfo);
-
-  /* Color quantizer selection */
-  master->quantizer_1pass = NULL;
-  master->quantizer_2pass = NULL;
-  /* No mode changes if not using buffered-image mode. */
-  if (! cinfo->quantize_colors || ! cinfo->buffered_image) {
-    cinfo->enable_1pass_quant = FALSE;
-    cinfo->enable_external_quant = FALSE;
-    cinfo->enable_2pass_quant = FALSE;
-  }
-  if (cinfo->quantize_colors) {
-    if (cinfo->raw_data_out)
-      ERREXIT(cinfo, JERR_NOTIMPL);
-    /* 2-pass quantizer only works in 3-component color space. */
-    if (cinfo->out_color_components != 3) {
-      cinfo->enable_1pass_quant = TRUE;
-      cinfo->enable_external_quant = FALSE;
-      cinfo->enable_2pass_quant = FALSE;
-      cinfo->colormap = NULL;
-    } else if (cinfo->colormap != NULL) {
-      cinfo->enable_external_quant = TRUE;
-    } else if (cinfo->two_pass_quantize) {
-      cinfo->enable_2pass_quant = TRUE;
-    } else {
-      cinfo->enable_1pass_quant = TRUE;
-    }
-
-    if (cinfo->enable_1pass_quant) {
-#ifdef QUANT_1PASS_SUPPORTED
-      jinit_1pass_quantizer(cinfo);
-      master->quantizer_1pass = cinfo->cquantize;
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-    }
-
-    /* We use the 2-pass code to map to external colormaps. */
-    if (cinfo->enable_2pass_quant || cinfo->enable_external_quant) {
-#ifdef QUANT_2PASS_SUPPORTED
-      jinit_2pass_quantizer(cinfo);
-      master->quantizer_2pass = cinfo->cquantize;
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-    }
-    /* If both quantizers are initialized, the 2-pass one is left active;
-     * this is necessary for starting with quantization to an external map.
-     */
-  }
-
-  /* Post-processing: in particular, color conversion first */
-  if (! cinfo->raw_data_out) {
-    if (master->using_merged_upsample) {
-#ifdef UPSAMPLE_MERGING_SUPPORTED
-      jinit_merged_upsampler(cinfo); /* does color conversion too */
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-    } else {
-      jinit_color_deconverter(cinfo);
-      jinit_upsampler(cinfo);
-    }
-    jinit_d_post_controller(cinfo, cinfo->enable_2pass_quant);
-  }
-  /* Inverse DCT */
-  jinit_inverse_dct(cinfo);
-  /* Entropy decoding: either Huffman or arithmetic coding. */
-  if (cinfo->arith_code) {
-    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
-  } else {
-    if (cinfo->progressive_mode) {
-#ifdef D_PROGRESSIVE_SUPPORTED
-      jinit_phuff_decoder(cinfo);
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-    } else
-      jinit_huff_decoder(cinfo);
-  }
-
-  /* Initialize principal buffer controllers. */
-  use_c_buffer = cinfo->inputctl->has_multiple_scans || cinfo->buffered_image;
-  jinit_d_coef_controller(cinfo, use_c_buffer);
-
-  if (! cinfo->raw_data_out)
-    jinit_d_main_controller(cinfo, FALSE /* never need full buffer here */);
-
-  /* We can now tell the memory manager to allocate virtual arrays. */
-  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
-
-  /* Initialize input side of decompressor to consume first scan. */
-  (*cinfo->inputctl->start_input_pass) (cinfo);
-
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-  /* If jpeg_start_decompress will read the whole file, initialize
-   * progress monitoring appropriately.  The input step is counted
-   * as one pass.
-   */
-  if (cinfo->progress != NULL && ! cinfo->buffered_image &&
-      cinfo->inputctl->has_multiple_scans) {
-    int nscans;
-    /* Estimate number of scans to set pass_limit. */
-    if (cinfo->progressive_mode) {
-      /* Arbitrarily estimate 2 interleaved DC scans + 3 AC scans/component. */
-      nscans = 2 + 3 * cinfo->num_components;
-    } else {
-      /* For a nonprogressive multiscan file, estimate 1 scan per component. */
-      nscans = cinfo->num_components;
-    }
-    cinfo->progress->pass_counter = 0L;
-    cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows * nscans;
-    cinfo->progress->completed_passes = 0;
-    cinfo->progress->total_passes = (cinfo->enable_2pass_quant ? 3 : 2);
-    /* Count the input pass as done */
-    master->pass_number++;
-  }
-#endif /* D_MULTISCAN_FILES_SUPPORTED */
-}
-
-
-/*
- * Per-pass setup.
- * This is called at the beginning of each output pass.  We determine which
- * modules will be active during this pass and give them appropriate
- * start_pass calls.  We also set is_dummy_pass to indicate whether this
- * is a "real" output pass or a dummy pass for color quantization.
- * (In the latter case, jdapi.c will crank the pass to completion.)
- */
-
-METHODDEF(void)
-prepare_for_output_pass (j_decompress_ptr cinfo)
-{
-  my_master_ptr master = (my_master_ptr) cinfo->master;
-
-  if (master->pub.is_dummy_pass) {
-#ifdef QUANT_2PASS_SUPPORTED
-    /* Final pass of 2-pass quantization */
-    master->pub.is_dummy_pass = FALSE;
-    (*cinfo->cquantize->start_pass) (cinfo, FALSE);
-    (*cinfo->post->start_pass) (cinfo, JBUF_CRANK_DEST);
-    (*cinfo->main->start_pass) (cinfo, JBUF_CRANK_DEST);
-#else
-    ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif /* QUANT_2PASS_SUPPORTED */
-  } else {
-    if (cinfo->quantize_colors && cinfo->colormap == NULL) {
-      /* Select new quantization method */
-      if (cinfo->two_pass_quantize && cinfo->enable_2pass_quant) {
-	cinfo->cquantize = master->quantizer_2pass;
-	master->pub.is_dummy_pass = TRUE;
-      } else if (cinfo->enable_1pass_quant) {
-	cinfo->cquantize = master->quantizer_1pass;
-      } else {
-	ERREXIT(cinfo, JERR_MODE_CHANGE);
-      }
-    }
-    (*cinfo->idct->start_pass) (cinfo);
-    (*cinfo->coef->start_output_pass) (cinfo);
-    if (! cinfo->raw_data_out) {
-      if (! master->using_merged_upsample)
-	(*cinfo->cconvert->start_pass) (cinfo);
-      (*cinfo->upsample->start_pass) (cinfo);
-      if (cinfo->quantize_colors)
-	(*cinfo->cquantize->start_pass) (cinfo, master->pub.is_dummy_pass);
-      (*cinfo->post->start_pass) (cinfo,
-	    (master->pub.is_dummy_pass ? JBUF_SAVE_AND_PASS : JBUF_PASS_THRU));
-      (*cinfo->main->start_pass) (cinfo, JBUF_PASS_THRU);
-    }
-  }
-
-  /* Set up progress monitor's pass info if present */
-  if (cinfo->progress != NULL) {
-    cinfo->progress->completed_passes = master->pass_number;
-    cinfo->progress->total_passes = master->pass_number +
-				    (master->pub.is_dummy_pass ? 2 : 1);
-    /* In buffered-image mode, we assume one more output pass if EOI not
-     * yet reached, but no more passes if EOI has been reached.
-     */
-    if (cinfo->buffered_image && ! cinfo->inputctl->eoi_reached) {
-      cinfo->progress->total_passes += (cinfo->enable_2pass_quant ? 2 : 1);
-    }
-  }
-}
-
-
-/*
- * Finish up at end of an output pass.
- */
-
-METHODDEF(void)
-finish_output_pass (j_decompress_ptr cinfo)
-{
-  my_master_ptr master = (my_master_ptr) cinfo->master;
-
-  if (cinfo->quantize_colors)
-    (*cinfo->cquantize->finish_pass) (cinfo);
-  master->pass_number++;
-}
-
-
-#ifdef D_MULTISCAN_FILES_SUPPORTED
-
-/*
- * Switch to a new external colormap between output passes.
- */
-
-GLOBAL(void)
-jpeg_new_colormap (j_decompress_ptr cinfo)
-{
-  my_master_ptr master = (my_master_ptr) cinfo->master;
-
-  /* Prevent application from calling me at wrong times */
-  if (cinfo->global_state != DSTATE_BUFIMAGE)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-
-  if (cinfo->quantize_colors && cinfo->enable_external_quant &&
-      cinfo->colormap != NULL) {
-    /* Select 2-pass quantizer for external colormap use */
-    cinfo->cquantize = master->quantizer_2pass;
-    /* Notify quantizer of colormap change */
-    (*cinfo->cquantize->new_color_map) (cinfo);
-    master->pub.is_dummy_pass = FALSE; /* just in case */
-  } else
-    ERREXIT(cinfo, JERR_MODE_CHANGE);
-}
-
-#endif /* D_MULTISCAN_FILES_SUPPORTED */
-
-
-/*
- * Initialize master decompression control and select active modules.
- * This is performed at the start of jpeg_start_decompress.
- */
-
-GLOBAL(void)
-jinit_master_decompress (j_decompress_ptr cinfo)
-{
-  my_master_ptr master;
-
-  master = (my_master_ptr)
-      (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				  SIZEOF(my_decomp_master));
-  cinfo->master = (struct jpeg_decomp_master *) master;
-  master->pub.prepare_for_output_pass = prepare_for_output_pass;
-  master->pub.finish_output_pass = finish_output_pass;
-
-  master->pub.is_dummy_pass = FALSE;
-
-  master_selection(cinfo);
-}

cde/lib/DtHelp/jpeg/jdmerge.c

@@ -1,423 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdmerge.c /main/2 1996/05/09 03:49:11 drk $ */
-/*
- * jdmerge.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains code for merged upsampling/color conversion.
- *
- * This file combines functions from jdsample.c and jdcolor.c;
- * read those files first to understand what's going on.
- *
- * When the chroma components are to be upsampled by simple replication
- * (ie, box filtering), we can save some work in color conversion by
- * calculating all the output pixels corresponding to a pair of chroma
- * samples at one time.  In the conversion equations
- *	R = Y           + K1 * Cr
- *	G = Y + K2 * Cb + K3 * Cr
- *	B = Y + K4 * Cb
- * only the Y term varies among the group of pixels corresponding to a pair
- * of chroma samples, so the rest of the terms can be calculated just once.
- * At typical sampling ratios, this eliminates half or three-quarters of the
- * multiplications needed for color conversion.
- *
- * This file currently provides implementations for the following cases:
- *	YCbCr => RGB color conversion only.
- *	Sampling ratios of 2h1v or 2h2v.
- *	No scaling needed at upsample time.
- *	Corner-aligned (non-CCIR601) sampling alignment.
- * Other special cases could be added, but in most applications these are
- * the only common cases.  (For uncommon cases we fall back on the more
- * general code in jdsample.c and jdcolor.c.)
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-#ifdef UPSAMPLE_MERGING_SUPPORTED
-
-
-/* Private subobject */
-
-typedef struct {
-  struct jpeg_upsampler pub;	/* public fields */
-
-  /* Pointer to routine to do actual upsampling/conversion of one row group */
-  JMETHOD(void, upmethod, (j_decompress_ptr cinfo,
-			   JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
-			   JSAMPARRAY output_buf));
-
-  /* Private state for YCC->RGB conversion */
-  int * Cr_r_tab;		/* => table for Cr to R conversion */
-  int * Cb_b_tab;		/* => table for Cb to B conversion */
-  INT32 * Cr_g_tab;		/* => table for Cr to G conversion */
-  INT32 * Cb_g_tab;		/* => table for Cb to G conversion */
-
-  /* For 2:1 vertical sampling, we produce two output rows at a time.
-   * We need a "spare" row buffer to hold the second output row if the
-   * application provides just a one-row buffer; we also use the spare
-   * to discard the dummy last row if the image height is odd.
-   */
-  JSAMPROW spare_row;
-  boolean spare_full;		/* T if spare buffer is occupied */
-
-  JDIMENSION out_row_width;	/* samples per output row */
-  JDIMENSION rows_to_go;	/* counts rows remaining in image */
-} my_upsampler;
-
-typedef my_upsampler * my_upsample_ptr;
-
-#define SCALEBITS	16	/* speediest right-shift on some machines */
-#define ONE_HALF	((INT32) 1 << (SCALEBITS-1))
-#define FIX(x)		((INT32) ((x) * (1L<<SCALEBITS) + 0.5))
-
-
-/*
- * Initialize tables for YCC->RGB colorspace conversion.
- * This is taken directly from jdcolor.c; see that file for more info.
- */
-
-LOCAL(void)
-build_ycc_rgb_table (j_decompress_ptr cinfo)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  int i;
-  INT32 x;
-  SHIFT_TEMPS
-
-  upsample->Cr_r_tab = (int *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(int));
-  upsample->Cb_b_tab = (int *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(int));
-  upsample->Cr_g_tab = (INT32 *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(INT32));
-  upsample->Cb_g_tab = (INT32 *)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				(MAXJSAMPLE+1) * SIZEOF(INT32));
-
-  for (i = 0, x = -CENTERJSAMPLE; i <= MAXJSAMPLE; i++, x++) {
-    /* i is the actual input pixel value, in the range 0..MAXJSAMPLE */
-    /* The Cb or Cr value we are thinking of is x = i - CENTERJSAMPLE */
-    /* Cr=>R value is nearest int to 1.40200 * x */
-    upsample->Cr_r_tab[i] = (int)
-		    RIGHT_SHIFT(FIX(1.40200) * x + ONE_HALF, SCALEBITS);
-    /* Cb=>B value is nearest int to 1.77200 * x */
-    upsample->Cb_b_tab[i] = (int)
-		    RIGHT_SHIFT(FIX(1.77200) * x + ONE_HALF, SCALEBITS);
-    /* Cr=>G value is scaled-up -0.71414 * x */
-    upsample->Cr_g_tab[i] = (- FIX(0.71414)) * x;
-    /* Cb=>G value is scaled-up -0.34414 * x */
-    /* We also add in ONE_HALF so that need not do it in inner loop */
-    upsample->Cb_g_tab[i] = (- FIX(0.34414)) * x + ONE_HALF;
-  }
-}
-
-
-/*
- * Initialize for an upsampling pass.
- */
-
-METHODDEF(void)
-start_pass_merged_upsample (j_decompress_ptr cinfo)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-
-  /* Mark the spare buffer empty */
-  upsample->spare_full = FALSE;
-  /* Initialize total-height counter for detecting bottom of image */
-  upsample->rows_to_go = cinfo->output_height;
-}
-
-
-/*
- * Control routine to do upsampling (and color conversion).
- *
- * The control routine just handles the row buffering considerations.
- */
-
-METHODDEF(void)
-merged_2v_upsample (j_decompress_ptr cinfo,
-		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-		    JDIMENSION in_row_groups_avail,
-		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-		    JDIMENSION out_rows_avail)
-/* 2:1 vertical sampling case: may need a spare row. */
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  JSAMPROW work_ptrs[2];
-  JDIMENSION num_rows;		/* number of rows returned to caller */
-
-  if (upsample->spare_full) {
-    /* If we have a spare row saved from a previous cycle, just return it. */
-    jcopy_sample_rows(& upsample->spare_row, 0, output_buf + *out_row_ctr, 0,
-		      1, upsample->out_row_width);
-    num_rows = 1;
-    upsample->spare_full = FALSE;
-  } else {
-    /* Figure number of rows to return to caller. */
-    num_rows = 2;
-    /* Not more than the distance to the end of the image. */
-    if (num_rows > upsample->rows_to_go)
-      num_rows = upsample->rows_to_go;
-    /* And not more than what the client can accept: */
-    out_rows_avail -= *out_row_ctr;
-    if (num_rows > out_rows_avail)
-      num_rows = out_rows_avail;
-    /* Create output pointer array for upsampler. */
-    work_ptrs[0] = output_buf[*out_row_ctr];
-    if (num_rows > 1) {
-      work_ptrs[1] = output_buf[*out_row_ctr + 1];
-    } else {
-      work_ptrs[1] = upsample->spare_row;
-      upsample->spare_full = TRUE;
-    }
-    /* Now do the upsampling. */
-    (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr, work_ptrs);
-  }
-
-  /* Adjust counts */
-  *out_row_ctr += num_rows;
-  upsample->rows_to_go -= num_rows;
-  /* When the buffer is emptied, declare this input row group consumed */
-  if (! upsample->spare_full)
-    (*in_row_group_ctr)++;
-}
-
-
-METHODDEF(void)
-merged_1v_upsample (j_decompress_ptr cinfo,
-		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-		    JDIMENSION in_row_groups_avail,
-		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-		    JDIMENSION out_rows_avail)
-/* 1:1 vertical sampling case: much easier, never need a spare row. */
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-
-  /* Just do the upsampling. */
-  (*upsample->upmethod) (cinfo, input_buf, *in_row_group_ctr,
-			 output_buf + *out_row_ctr);
-  /* Adjust counts */
-  (*out_row_ctr)++;
-  (*in_row_group_ctr)++;
-}
-
-
-/*
- * These are the routines invoked by the control routines to do
- * the actual upsampling/conversion.  One row group is processed per call.
- *
- * Note: since we may be writing directly into application-supplied buffers,
- * we have to be honest about the output width; we can't assume the buffer
- * has been rounded up to an even width.
- */
-
-
-/*
- * Upsample and color convert for the case of 2:1 horizontal and 1:1 vertical.
- */
-
-METHODDEF(void)
-h2v1_merged_upsample (j_decompress_ptr cinfo,
-		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
-		      JSAMPARRAY output_buf)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  int y, cred, cgreen, cblue;
-  int cb, cr;
-  JSAMPROW outptr;
-  JSAMPROW inptr0, inptr1, inptr2;
-  JDIMENSION col;
-  /* copy these pointers into registers if possible */
-  JSAMPLE * range_limit = cinfo->sample_range_limit;
-  int * Crrtab = upsample->Cr_r_tab;
-  int * Cbbtab = upsample->Cb_b_tab;
-  INT32 * Crgtab = upsample->Cr_g_tab;
-  INT32 * Cbgtab = upsample->Cb_g_tab;
-  SHIFT_TEMPS
-
-  inptr0 = input_buf[0][in_row_group_ctr];
-  inptr1 = input_buf[1][in_row_group_ctr];
-  inptr2 = input_buf[2][in_row_group_ctr];
-  outptr = output_buf[0];
-  /* Loop for each pair of output pixels */
-  for (col = cinfo->output_width >> 1; col > 0; col--) {
-    /* Do the chroma part of the calculation */
-    cb = GETJSAMPLE(*inptr1++);
-    cr = GETJSAMPLE(*inptr2++);
-    cred = Crrtab[cr];
-    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
-    cblue = Cbbtab[cb];
-    /* Fetch 2 Y values and emit 2 pixels */
-    y  = GETJSAMPLE(*inptr0++);
-    outptr[RGB_RED] =   range_limit[y + cred];
-    outptr[RGB_GREEN] = range_limit[y + cgreen];
-    outptr[RGB_BLUE] =  range_limit[y + cblue];
-    outptr += RGB_PIXELSIZE;
-    y  = GETJSAMPLE(*inptr0++);
-    outptr[RGB_RED] =   range_limit[y + cred];
-    outptr[RGB_GREEN] = range_limit[y + cgreen];
-    outptr[RGB_BLUE] =  range_limit[y + cblue];
-    outptr += RGB_PIXELSIZE;
-  }
-  /* If image width is odd, do the last output column separately */
-  if (cinfo->output_width & 1) {
-    cb = GETJSAMPLE(*inptr1);
-    cr = GETJSAMPLE(*inptr2);
-    cred = Crrtab[cr];
-    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
-    cblue = Cbbtab[cb];
-    y  = GETJSAMPLE(*inptr0);
-    outptr[RGB_RED] =   range_limit[y + cred];
-    outptr[RGB_GREEN] = range_limit[y + cgreen];
-    outptr[RGB_BLUE] =  range_limit[y + cblue];
-  }
-}
-
-
-/*
- * Upsample and color convert for the case of 2:1 horizontal and 2:1 vertical.
- */
-
-METHODDEF(void)
-h2v2_merged_upsample (j_decompress_ptr cinfo,
-		      JSAMPIMAGE input_buf, JDIMENSION in_row_group_ctr,
-		      JSAMPARRAY output_buf)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  int y, cred, cgreen, cblue;
-  int cb, cr;
-  JSAMPROW outptr0, outptr1;
-  JSAMPROW inptr00, inptr01, inptr1, inptr2;
-  JDIMENSION col;
-  /* copy these pointers into registers if possible */
-  JSAMPLE * range_limit = cinfo->sample_range_limit;
-  int * Crrtab = upsample->Cr_r_tab;
-  int * Cbbtab = upsample->Cb_b_tab;
-  INT32 * Crgtab = upsample->Cr_g_tab;
-  INT32 * Cbgtab = upsample->Cb_g_tab;
-  SHIFT_TEMPS
-
-  inptr00 = input_buf[0][in_row_group_ctr*2];
-  inptr01 = input_buf[0][in_row_group_ctr*2 + 1];
-  inptr1 = input_buf[1][in_row_group_ctr];
-  inptr2 = input_buf[2][in_row_group_ctr];
-  outptr0 = output_buf[0];
-  outptr1 = output_buf[1];
-  /* Loop for each group of output pixels */
-  for (col = cinfo->output_width >> 1; col > 0; col--) {
-    /* Do the chroma part of the calculation */
-    cb = GETJSAMPLE(*inptr1++);
-    cr = GETJSAMPLE(*inptr2++);
-    cred = Crrtab[cr];
-    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
-    cblue = Cbbtab[cb];
-    /* Fetch 4 Y values and emit 4 pixels */
-    y  = GETJSAMPLE(*inptr00++);
-    outptr0[RGB_RED] =   range_limit[y + cred];
-    outptr0[RGB_GREEN] = range_limit[y + cgreen];
-    outptr0[RGB_BLUE] =  range_limit[y + cblue];
-    outptr0 += RGB_PIXELSIZE;
-    y  = GETJSAMPLE(*inptr00++);
-    outptr0[RGB_RED] =   range_limit[y + cred];
-    outptr0[RGB_GREEN] = range_limit[y + cgreen];
-    outptr0[RGB_BLUE] =  range_limit[y + cblue];
-    outptr0 += RGB_PIXELSIZE;
-    y  = GETJSAMPLE(*inptr01++);
-    outptr1[RGB_RED] =   range_limit[y + cred];
-    outptr1[RGB_GREEN] = range_limit[y + cgreen];
-    outptr1[RGB_BLUE] =  range_limit[y + cblue];
-    outptr1 += RGB_PIXELSIZE;
-    y  = GETJSAMPLE(*inptr01++);
-    outptr1[RGB_RED] =   range_limit[y + cred];
-    outptr1[RGB_GREEN] = range_limit[y + cgreen];
-    outptr1[RGB_BLUE] =  range_limit[y + cblue];
-    outptr1 += RGB_PIXELSIZE;
-  }
-  /* If image width is odd, do the last output column separately */
-  if (cinfo->output_width & 1) {
-    cb = GETJSAMPLE(*inptr1);
-    cr = GETJSAMPLE(*inptr2);
-    cred = Crrtab[cr];
-    cgreen = (int) RIGHT_SHIFT(Cbgtab[cb] + Crgtab[cr], SCALEBITS);
-    cblue = Cbbtab[cb];
-    y  = GETJSAMPLE(*inptr00);
-    outptr0[RGB_RED] =   range_limit[y + cred];
-    outptr0[RGB_GREEN] = range_limit[y + cgreen];
-    outptr0[RGB_BLUE] =  range_limit[y + cblue];
-    y  = GETJSAMPLE(*inptr01);
-    outptr1[RGB_RED] =   range_limit[y + cred];
-    outptr1[RGB_GREEN] = range_limit[y + cgreen];
-    outptr1[RGB_BLUE] =  range_limit[y + cblue];
-  }
-}
-
-
-/*
- * Module initialization routine for merged upsampling/color conversion.
- *
- * NB: this is called under the conditions determined by use_merged_upsample()
- * in jdmaster.c.  That routine MUST correspond to the actual capabilities
- * of this module; no safety checks are made here.
- */
-
-GLOBAL(void)
-jinit_merged_upsampler (j_decompress_ptr cinfo)
-{
-  my_upsample_ptr upsample;
-
-  upsample = (my_upsample_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_upsampler));
-  cinfo->upsample = (struct jpeg_upsampler *) upsample;
-  upsample->pub.start_pass = start_pass_merged_upsample;
-  upsample->pub.need_context_rows = FALSE;
-
-  upsample->out_row_width = cinfo->output_width * cinfo->out_color_components;
-
-  if (cinfo->max_v_samp_factor == 2) {
-    upsample->pub.upsample = merged_2v_upsample;
-    upsample->upmethod = h2v2_merged_upsample;
-    /* Allocate a spare row buffer */
-    upsample->spare_row = (JSAMPROW)
-      (*cinfo->mem->alloc_large) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-		(size_t) (upsample->out_row_width * SIZEOF(JSAMPLE)));
-  } else {
-    upsample->pub.upsample = merged_1v_upsample;
-    upsample->upmethod = h2v1_merged_upsample;
-    /* No spare row needed */
-    upsample->spare_row = NULL;
-  }
-
-  build_ycc_rgb_table(cinfo);
-}
-
-#endif /* UPSAMPLE_MERGING_SUPPORTED */

cde/lib/DtHelp/jpeg/jdphuff.c

@@ -1,665 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdphuff.c /main/2 1996/05/09 03:49:25 drk $ */
-/*
- * jdphuff.c
- *
- * Copyright (C) 1995-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains Huffman entropy decoding routines for progressive JPEG.
- *
- * Much of the complexity here has to do with supporting input suspension.
- * If the data source module demands suspension, we want to be able to back
- * up to the start of the current MCU.  To do this, we copy state variables
- * into local working storage, and update them back to the permanent
- * storage only upon successful completion of an MCU.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdhuff.h"		/* Declarations shared with jdhuff.c */
-
-
-#ifdef D_PROGRESSIVE_SUPPORTED
-
-/*
- * Expanded entropy decoder object for progressive Huffman decoding.
- *
- * The savable_state subrecord contains fields that change within an MCU,
- * but must not be updated permanently until we complete the MCU.
- */
-
-typedef struct {
-  unsigned int EOBRUN;			/* remaining EOBs in EOBRUN */
-  int last_dc_val[MAX_COMPS_IN_SCAN];	/* last DC coef for each component */
-} savable_state;
-
-/* This macro is to work around compilers with missing or broken
- * structure assignment.  You'll need to fix this code if you have
- * such a compiler and you change MAX_COMPS_IN_SCAN.
- */
-
-#ifndef NO_STRUCT_ASSIGN
-#define ASSIGN_STATE(dest,src)  ((dest) = (src))
-#else
-#if MAX_COMPS_IN_SCAN == 4
-#define ASSIGN_STATE(dest,src)  \
-	((dest).EOBRUN = (src).EOBRUN, \
-	 (dest).last_dc_val[0] = (src).last_dc_val[0], \
-	 (dest).last_dc_val[1] = (src).last_dc_val[1], \
-	 (dest).last_dc_val[2] = (src).last_dc_val[2], \
-	 (dest).last_dc_val[3] = (src).last_dc_val[3])
-#endif
-#endif
-
-
-typedef struct {
-  struct jpeg_entropy_decoder pub; /* public fields */
-
-  /* These fields are loaded into local variables at start of each MCU.
-   * In case of suspension, we exit WITHOUT updating them.
-   */
-  bitread_perm_state bitstate;	/* Bit buffer at start of MCU */
-  savable_state saved;		/* Other state at start of MCU */
-
-  /* These fields are NOT loaded into local working state. */
-  unsigned int restarts_to_go;	/* MCUs left in this restart interval */
-
-  /* Pointers to derived tables (these workspaces have image lifespan) */
-  d_derived_tbl * derived_tbls[NUM_HUFF_TBLS];
-
-  d_derived_tbl * ac_derived_tbl; /* active table during an AC scan */
-} phuff_entropy_decoder;
-
-typedef phuff_entropy_decoder * phuff_entropy_ptr;
-
-/* Forward declarations */
-METHODDEF(boolean) decode_mcu_DC_first JPP((j_decompress_ptr cinfo,
-					    JBLOCKROW *MCU_data));
-METHODDEF(boolean) decode_mcu_AC_first JPP((j_decompress_ptr cinfo,
-					    JBLOCKROW *MCU_data));
-METHODDEF(boolean) decode_mcu_DC_refine JPP((j_decompress_ptr cinfo,
-					     JBLOCKROW *MCU_data));
-METHODDEF(boolean) decode_mcu_AC_refine JPP((j_decompress_ptr cinfo,
-					     JBLOCKROW *MCU_data));
-
-
-/*
- * Initialize for a Huffman-compressed scan.
- */
-
-METHODDEF(void)
-start_pass_phuff_decoder (j_decompress_ptr cinfo)
-{
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  boolean is_DC_band, bad;
-  int ci, coefi, tbl;
-  int *coef_bit_ptr;
-  jpeg_component_info * compptr;
-
-  is_DC_band = (cinfo->Ss == 0);
-
-  /* Validate scan parameters */
-  bad = FALSE;
-  if (is_DC_band) {
-    if (cinfo->Se != 0)
-      bad = TRUE;
-  } else {
-    /* need not check Ss/Se < 0 since they came from unsigned bytes */
-    if (cinfo->Ss > cinfo->Se || cinfo->Se >= DCTSIZE2)
-      bad = TRUE;
-    /* AC scans may have only one component */
-    if (cinfo->comps_in_scan != 1)
-      bad = TRUE;
-  }
-  if (cinfo->Ah != 0) {
-    /* Successive approximation refinement scan: must have Al = Ah-1. */
-    if (cinfo->Al != cinfo->Ah-1)
-      bad = TRUE;
-  }
-  if (cinfo->Al > 13)		/* need not check for < 0 */
-    bad = TRUE;
-  if (bad)
-    ERREXIT4(cinfo, JERR_BAD_PROGRESSION,
-	     cinfo->Ss, cinfo->Se, cinfo->Ah, cinfo->Al);
-  /* Update progression status, and verify that scan order is legal.
-   * Note that inter-scan inconsistencies are treated as warnings
-   * not fatal errors ... not clear if this is right way to behave.
-   */
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-    int cindex = cinfo->cur_comp_info[ci]->component_index;
-    coef_bit_ptr = & cinfo->coef_bits[cindex][0];
-    if (!is_DC_band && coef_bit_ptr[0] < 0) /* AC without prior DC scan */
-      WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, 0);
-    for (coefi = cinfo->Ss; coefi <= cinfo->Se; coefi++) {
-      int expected = (coef_bit_ptr[coefi] < 0) ? 0 : coef_bit_ptr[coefi];
-      if (cinfo->Ah != expected)
-	WARNMS2(cinfo, JWRN_BOGUS_PROGRESSION, cindex, coefi);
-      coef_bit_ptr[coefi] = cinfo->Al;
-    }
-  }
-
-  /* Select MCU decoding routine */
-  if (cinfo->Ah == 0) {
-    if (is_DC_band)
-      entropy->pub.decode_mcu = decode_mcu_DC_first;
-    else
-      entropy->pub.decode_mcu = decode_mcu_AC_first;
-  } else {
-    if (is_DC_band)
-      entropy->pub.decode_mcu = decode_mcu_DC_refine;
-    else
-      entropy->pub.decode_mcu = decode_mcu_AC_refine;
-  }
-
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++) {
-    compptr = cinfo->cur_comp_info[ci];
-    /* Make sure requested tables are present, and compute derived tables.
-     * We may build same derived table more than once, but it's not expensive.
-     */
-    if (is_DC_band) {
-      if (cinfo->Ah == 0) {	/* DC refinement needs no table */
-	tbl = compptr->dc_tbl_no;
-	if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-	    cinfo->dc_huff_tbl_ptrs[tbl] == NULL)
-	  ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
-	jpeg_make_d_derived_tbl(cinfo, cinfo->dc_huff_tbl_ptrs[tbl],
-				& entropy->derived_tbls[tbl]);
-      }
-    } else {
-      tbl = compptr->ac_tbl_no;
-      if (tbl < 0 || tbl >= NUM_HUFF_TBLS ||
-          cinfo->ac_huff_tbl_ptrs[tbl] == NULL)
-        ERREXIT1(cinfo, JERR_NO_HUFF_TABLE, tbl);
-      jpeg_make_d_derived_tbl(cinfo, cinfo->ac_huff_tbl_ptrs[tbl],
-			      & entropy->derived_tbls[tbl]);
-      /* remember the single active table */
-      entropy->ac_derived_tbl = entropy->derived_tbls[tbl];
-    }
-    /* Initialize DC predictions to 0 */
-    entropy->saved.last_dc_val[ci] = 0;
-  }
-
-  /* Initialize bitread state variables */
-  entropy->bitstate.bits_left = 0;
-  entropy->bitstate.get_buffer = 0; /* unnecessary, but keeps Purify quiet */
-  entropy->bitstate.printed_eod = FALSE;
-
-  /* Initialize private state variables */
-  entropy->saved.EOBRUN = 0;
-
-  /* Initialize restart counter */
-  entropy->restarts_to_go = cinfo->restart_interval;
-}
-
-
-/*
- * Figure F.12: extend sign bit.
- * On some machines, a shift and add will be faster than a table lookup.
- */
-
-#ifdef AVOID_TABLES
-
-#define HUFF_EXTEND(x,s)  ((x) < (1<<((s)-1)) ? (x) + (((-1)<<(s)) + 1) : (x))
-
-#else
-
-#define HUFF_EXTEND(x,s)  ((x) < extend_test[s] ? (x) + extend_offset[s] : (x))
-
-static const int extend_test[16] =   /* entry n is 2**(n-1) */
-  { 0, 0x0001, 0x0002, 0x0004, 0x0008, 0x0010, 0x0020, 0x0040, 0x0080,
-    0x0100, 0x0200, 0x0400, 0x0800, 0x1000, 0x2000, 0x4000 };
-
-static const int extend_offset[16] = /* entry n is (-1 << n) + 1 */
-  { 0, ((-1)<<1) + 1, ((-1)<<2) + 1, ((-1)<<3) + 1, ((-1)<<4) + 1,
-    ((-1)<<5) + 1, ((-1)<<6) + 1, ((-1)<<7) + 1, ((-1)<<8) + 1,
-    ((-1)<<9) + 1, ((-1)<<10) + 1, ((-1)<<11) + 1, ((-1)<<12) + 1,
-    ((-1)<<13) + 1, ((-1)<<14) + 1, ((-1)<<15) + 1 };
-
-#endif /* AVOID_TABLES */
-
-
-/*
- * Check for a restart marker & resynchronize decoder.
- * Returns FALSE if must suspend.
- */
-
-LOCAL(boolean)
-process_restart (j_decompress_ptr cinfo)
-{
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  int ci;
-
-  /* Throw away any unused bits remaining in bit buffer; */
-  /* include any full bytes in next_marker's count of discarded bytes */
-  cinfo->marker->discarded_bytes += entropy->bitstate.bits_left / 8;
-  entropy->bitstate.bits_left = 0;
-
-  /* Advance past the RSTn marker */
-  if (! (*cinfo->marker->read_restart_marker) (cinfo))
-    return FALSE;
-
-  /* Re-initialize DC predictions to 0 */
-  for (ci = 0; ci < cinfo->comps_in_scan; ci++)
-    entropy->saved.last_dc_val[ci] = 0;
-  /* Re-init EOB run count, too */
-  entropy->saved.EOBRUN = 0;
-
-  /* Reset restart counter */
-  entropy->restarts_to_go = cinfo->restart_interval;
-
-  /* Next segment can get another out-of-data warning */
-  entropy->bitstate.printed_eod = FALSE;
-
-  return TRUE;
-}
-
-
-/*
- * Huffman MCU decoding.
- * Each of these routines decodes and returns one MCU's worth of
- * Huffman-compressed coefficients. 
- * The coefficients are reordered from zigzag order into natural array order,
- * but are not dequantized.
- *
- * The i'th block of the MCU is stored into the block pointed to by
- * MCU_data[i].  WE ASSUME THIS AREA IS INITIALLY ZEROED BY THE CALLER.
- *
- * We return FALSE if data source requested suspension.  In that case no
- * changes have been made to permanent state.  (Exception: some output
- * coefficients may already have been assigned.  This is harmless for
- * spectral selection, since we'll just re-assign them on the next call.
- * Successive approximation AC refinement has to be more careful, however.)
- */
-
-/*
- * MCU decoding for DC initial scan (either spectral selection,
- * or first pass of successive approximation).
- */
-
-METHODDEF(boolean)
-decode_mcu_DC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
-{   
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  int Al = cinfo->Al;
-  int s, r;
-  int blkn, ci;
-  JBLOCKROW block;
-  BITREAD_STATE_VARS;
-  savable_state state;
-  d_derived_tbl * tbl;
-  jpeg_component_info * compptr;
-
-  /* Process restart marker if needed; may have to suspend */
-  if (cinfo->restart_interval) {
-    if (entropy->restarts_to_go == 0)
-      if (! process_restart(cinfo))
-	return FALSE;
-  }
-
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(state, entropy->saved);
-
-  /* Outer loop handles each block in the MCU */
-
-  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
-    block = MCU_data[blkn];
-    ci = cinfo->MCU_membership[blkn];
-    compptr = cinfo->cur_comp_info[ci];
-    tbl = entropy->derived_tbls[compptr->dc_tbl_no];
-
-    /* Decode a single block's worth of coefficients */
-
-    /* Section F.2.2.1: decode the DC coefficient difference */
-    HUFF_DECODE(s, br_state, tbl, return FALSE, label1);
-    if (s) {
-      CHECK_BIT_BUFFER(br_state, s, return FALSE);
-      r = GET_BITS(s);
-      s = HUFF_EXTEND(r, s);
-    }
-
-    /* Convert DC difference to actual value, update last_dc_val */
-    s += state.last_dc_val[ci];
-    state.last_dc_val[ci] = s;
-    /* Scale and output the DC coefficient (assumes jpeg_natural_order[0]=0) */
-    (*block)[0] = (JCOEF) (s << Al);
-  }
-
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  ASSIGN_STATE(entropy->saved, state);
-
-  /* Account for restart interval (no-op if not using restarts) */
-  entropy->restarts_to_go--;
-
-  return TRUE;
-}
-
-
-/*
- * MCU decoding for AC initial scan (either spectral selection,
- * or first pass of successive approximation).
- */
-
-METHODDEF(boolean)
-decode_mcu_AC_first (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
-{   
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  int Se = cinfo->Se;
-  int Al = cinfo->Al;
-  int s, k, r;
-  unsigned int EOBRUN;
-  JBLOCKROW block;
-  BITREAD_STATE_VARS;
-  d_derived_tbl * tbl;
-
-  /* Process restart marker if needed; may have to suspend */
-  if (cinfo->restart_interval) {
-    if (entropy->restarts_to_go == 0)
-      if (! process_restart(cinfo))
-	return FALSE;
-  }
-
-  /* Load up working state.
-   * We can avoid loading/saving bitread state if in an EOB run.
-   */
-  EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we care about */
-
-  /* There is always only one block per MCU */
-
-  if (EOBRUN > 0)		/* if it's a band of zeroes... */
-    EOBRUN--;			/* ...process it now (we do nothing) */
-  else {
-    BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-    block = MCU_data[0];
-    tbl = entropy->ac_derived_tbl;
-
-    for (k = cinfo->Ss; k <= Se; k++) {
-      HUFF_DECODE(s, br_state, tbl, return FALSE, label2);
-      r = s >> 4;
-      s &= 15;
-      if (s) {
-        k += r;
-        CHECK_BIT_BUFFER(br_state, s, return FALSE);
-        r = GET_BITS(s);
-        s = HUFF_EXTEND(r, s);
-	/* Scale and output coefficient in natural (dezigzagged) order */
-        (*block)[jpeg_natural_order[k]] = (JCOEF) (s << Al);
-      } else {
-        if (r == 15) {		/* ZRL */
-          k += 15;		/* skip 15 zeroes in band */
-        } else {		/* EOBr, run length is 2^r + appended bits */
-          EOBRUN = 1 << r;
-          if (r) {		/* EOBr, r > 0 */
-	    CHECK_BIT_BUFFER(br_state, r, return FALSE);
-            r = GET_BITS(r);
-            EOBRUN += r;
-          }
-	  EOBRUN--;		/* this band is processed at this moment */
-	  break;		/* force end-of-band */
-	}
-      }
-    }
-
-    BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  }
-
-  /* Completed MCU, so update state */
-  entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we care about */
-
-  /* Account for restart interval (no-op if not using restarts) */
-  entropy->restarts_to_go--;
-
-  return TRUE;
-}
-
-
-/*
- * MCU decoding for DC successive approximation refinement scan.
- * Note: we assume such scans can be multi-component, although the spec
- * is not very clear on the point.
- */
-
-METHODDEF(boolean)
-decode_mcu_DC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
-{   
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  int p1 = 1 << cinfo->Al;	/* 1 in the bit position being coded */
-  int blkn;
-  JBLOCKROW block;
-  BITREAD_STATE_VARS;
-
-  /* Process restart marker if needed; may have to suspend */
-  if (cinfo->restart_interval) {
-    if (entropy->restarts_to_go == 0)
-      if (! process_restart(cinfo))
-	return FALSE;
-  }
-
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-
-  /* Outer loop handles each block in the MCU */
-
-  for (blkn = 0; blkn < cinfo->blocks_in_MCU; blkn++) {
-    block = MCU_data[blkn];
-
-    /* Encoded data is simply the next bit of the two's-complement DC value */
-    CHECK_BIT_BUFFER(br_state, 1, return FALSE);
-    if (GET_BITS(1))
-      (*block)[0] |= p1;
-    /* Note: since we use |=, repeating the assignment later is safe */
-  }
-
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-
-  /* Account for restart interval (no-op if not using restarts) */
-  entropy->restarts_to_go--;
-
-  return TRUE;
-}
-
-
-/*
- * MCU decoding for AC successive approximation refinement scan.
- */
-
-METHODDEF(boolean)
-decode_mcu_AC_refine (j_decompress_ptr cinfo, JBLOCKROW *MCU_data)
-{   
-  phuff_entropy_ptr entropy = (phuff_entropy_ptr) cinfo->entropy;
-  int Se = cinfo->Se;
-  int p1 = 1 << cinfo->Al;	/* 1 in the bit position being coded */
-  int m1 = (-1) << cinfo->Al;	/* -1 in the bit position being coded */
-  int s, k, r;
-  unsigned int EOBRUN;
-  JBLOCKROW block;
-  JCOEFPTR thiscoef;
-  BITREAD_STATE_VARS;
-  d_derived_tbl * tbl;
-  int num_newnz;
-  int newnz_pos[DCTSIZE2];
-
-  /* Process restart marker if needed; may have to suspend */
-  if (cinfo->restart_interval) {
-    if (entropy->restarts_to_go == 0)
-      if (! process_restart(cinfo))
-	return FALSE;
-  }
-
-  /* Load up working state */
-  BITREAD_LOAD_STATE(cinfo,entropy->bitstate);
-  EOBRUN = entropy->saved.EOBRUN; /* only part of saved state we care about */
-
-  /* There is always only one block per MCU */
-  block = MCU_data[0];
-  tbl = entropy->ac_derived_tbl;
-
-  /* If we are forced to suspend, we must undo the assignments to any newly
-   * nonzero coefficients in the block, because otherwise we'd get confused
-   * next time about which coefficients were already nonzero.
-   * But we need not undo addition of bits to already-nonzero coefficients;
-   * instead, we can test the current bit position to see if we already did it.
-   */
-  num_newnz = 0;
-
-  /* initialize coefficient loop counter to start of band */
-  k = cinfo->Ss;
-
-  if (EOBRUN == 0) {
-    for (; k <= Se; k++) {
-      HUFF_DECODE(s, br_state, tbl, goto undoit, label3);
-      r = s >> 4;
-      s &= 15;
-      if (s) {
-	if (s != 1)		/* size of new coef should always be 1 */
-	  WARNMS(cinfo, JWRN_HUFF_BAD_CODE);
-        CHECK_BIT_BUFFER(br_state, 1, goto undoit);
-        if (GET_BITS(1))
-	  s = p1;		/* newly nonzero coef is positive */
-	else
-	  s = m1;		/* newly nonzero coef is negative */
-      } else {
-	if (r != 15) {
-	  EOBRUN = 1 << r;	/* EOBr, run length is 2^r + appended bits */
-	  if (r) {
-	    CHECK_BIT_BUFFER(br_state, r, goto undoit);
-	    r = GET_BITS(r);
-	    EOBRUN += r;
-	  }
-	  break;		/* rest of block is handled by EOB logic */
-	}
-	/* note s = 0 for processing ZRL */
-      }
-      /* Advance over already-nonzero coefs and r still-zero coefs,
-       * appending correction bits to the nonzeroes.  A correction bit is 1
-       * if the absolute value of the coefficient must be increased.
-       */
-      do {
-	thiscoef = *block + jpeg_natural_order[k];
-	if (*thiscoef != 0) {
-	  CHECK_BIT_BUFFER(br_state, 1, goto undoit);
-	  if (GET_BITS(1)) {
-	    if ((*thiscoef & p1) == 0) { /* do nothing if already changed it */
-	      if (*thiscoef >= 0)
-		*thiscoef += p1;
-	      else
-		*thiscoef += m1;
-	    }
-	  }
-	} else {
-	  if (--r < 0)
-	    break;		/* reached target zero coefficient */
-	}
-	k++;
-      } while (k <= Se);
-      if (s) {
-	int pos = jpeg_natural_order[k];
-	/* Output newly nonzero coefficient */
-	(*block)[pos] = (JCOEF) s;
-	/* Remember its position in case we have to suspend */
-	newnz_pos[num_newnz++] = pos;
-      }
-    }
-  }
-
-  if (EOBRUN > 0) {
-    /* Scan any remaining coefficient positions after the end-of-band
-     * (the last newly nonzero coefficient, if any).  Append a correction
-     * bit to each already-nonzero coefficient.  A correction bit is 1
-     * if the absolute value of the coefficient must be increased.
-     */
-    for (; k <= Se; k++) {
-      thiscoef = *block + jpeg_natural_order[k];
-      if (*thiscoef != 0) {
-	CHECK_BIT_BUFFER(br_state, 1, goto undoit);
-	if (GET_BITS(1)) {
-	  if ((*thiscoef & p1) == 0) { /* do nothing if already changed it */
-	    if (*thiscoef >= 0)
-	      *thiscoef += p1;
-	    else
-	      *thiscoef += m1;
-	  }
-	}
-      }
-    }
-    /* Count one block completed in EOB run */
-    EOBRUN--;
-  }
-
-  /* Completed MCU, so update state */
-  BITREAD_SAVE_STATE(cinfo,entropy->bitstate);
-  entropy->saved.EOBRUN = EOBRUN; /* only part of saved state we care about */
-
-  /* Account for restart interval (no-op if not using restarts) */
-  entropy->restarts_to_go--;
-
-  return TRUE;
-
-undoit:
-  /* Re-zero any output coefficients that we made newly nonzero */
-  while (num_newnz > 0)
-    (*block)[newnz_pos[--num_newnz]] = 0;
-
-  return FALSE;
-}
-
-
-/*
- * Module initialization routine for progressive Huffman entropy decoding.
- */
-
-GLOBAL(void)
-jinit_phuff_decoder (j_decompress_ptr cinfo)
-{
-  phuff_entropy_ptr entropy;
-  int *coef_bit_ptr;
-  int ci, i;
-
-  entropy = (phuff_entropy_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(phuff_entropy_decoder));
-  cinfo->entropy = (struct jpeg_entropy_decoder *) entropy;
-  entropy->pub.start_pass = start_pass_phuff_decoder;
-
-  /* Mark derived tables unallocated */
-  for (i = 0; i < NUM_HUFF_TBLS; i++) {
-    entropy->derived_tbls[i] = NULL;
-  }
-
-  /* Create progression status table */
-  cinfo->coef_bits = (int (*)[DCTSIZE2])
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				cinfo->num_components*DCTSIZE2*SIZEOF(int));
-  coef_bit_ptr = & cinfo->coef_bits[0][0];
-  for (ci = 0; ci < cinfo->num_components; ci++) 
-    for (i = 0; i < DCTSIZE2; i++)
-      *coef_bit_ptr++ = -1;
-}
-
-#endif /* D_PROGRESSIVE_SUPPORTED */

cde/lib/DtHelp/jpeg/jdpostct.c

@@ -1,313 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdpostct.c /main/2 1996/05/09 03:49:39 drk $ */
-/*
- * jdpostct.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains the decompression postprocessing controller.
- * This controller manages the upsampling, color conversion, and color
- * quantization/reduction steps; specifically, it controls the buffering
- * between upsample/color conversion and color quantization/reduction.
- *
- * If no color quantization/reduction is required, then this module has no
- * work to do, and it just hands off to the upsample/color conversion code.
- * An integrated upsample/convert/quantize process would replace this module
- * entirely.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Private buffer controller object */
-
-typedef struct {
-  struct jpeg_d_post_controller pub; /* public fields */
-
-  /* Color quantization source buffer: this holds output data from
-   * the upsample/color conversion step to be passed to the quantizer.
-   * For two-pass color quantization, we need a full-image buffer;
-   * for one-pass operation, a strip buffer is sufficient.
-   */
-  jvirt_sarray_ptr whole_image;	/* virtual array, or NULL if one-pass */
-  JSAMPARRAY buffer;		/* strip buffer, or current strip of virtual */
-  JDIMENSION strip_height;	/* buffer size in rows */
-  /* for two-pass mode only: */
-  JDIMENSION starting_row;	/* row # of first row in current strip */
-  JDIMENSION next_row;		/* index of next row to fill/empty in strip */
-} my_post_controller;
-
-typedef my_post_controller * my_post_ptr;
-
-
-/* Forward declarations */
-METHODDEF(void) post_process_1pass
-	JPP((j_decompress_ptr cinfo,
-	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-	     JDIMENSION in_row_groups_avail,
-	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-	     JDIMENSION out_rows_avail));
-#ifdef QUANT_2PASS_SUPPORTED
-METHODDEF(void) post_process_prepass
-	JPP((j_decompress_ptr cinfo,
-	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-	     JDIMENSION in_row_groups_avail,
-	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-	     JDIMENSION out_rows_avail));
-METHODDEF(void) post_process_2pass
-	JPP((j_decompress_ptr cinfo,
-	     JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-	     JDIMENSION in_row_groups_avail,
-	     JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-	     JDIMENSION out_rows_avail));
-#endif
-
-
-/*
- * Initialize for a processing pass.
- */
-
-METHODDEF(void)
-start_pass_dpost (j_decompress_ptr cinfo, J_BUF_MODE pass_mode)
-{
-  my_post_ptr post = (my_post_ptr) cinfo->post;
-
-  switch (pass_mode) {
-  case JBUF_PASS_THRU:
-    if (cinfo->quantize_colors) {
-      /* Single-pass processing with color quantization. */
-      post->pub.post_process_data = post_process_1pass;
-      /* We could be doing buffered-image output before starting a 2-pass
-       * color quantization; in that case, jinit_d_post_controller did not
-       * allocate a strip buffer.  Use the virtual-array buffer as workspace.
-       */
-      if (post->buffer == NULL) {
-	post->buffer = (*cinfo->mem->access_virt_sarray)
-	  ((j_common_ptr) cinfo, post->whole_image,
-	   (JDIMENSION) 0, post->strip_height, TRUE);
-      }
-    } else {
-      /* For single-pass processing without color quantization,
-       * I have no work to do; just call the upsampler directly.
-       */
-      post->pub.post_process_data = cinfo->upsample->upsample;
-    }
-    break;
-#ifdef QUANT_2PASS_SUPPORTED
-  case JBUF_SAVE_AND_PASS:
-    /* First pass of 2-pass quantization */
-    if (post->whole_image == NULL)
-      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-    post->pub.post_process_data = post_process_prepass;
-    break;
-  case JBUF_CRANK_DEST:
-    /* Second pass of 2-pass quantization */
-    if (post->whole_image == NULL)
-      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-    post->pub.post_process_data = post_process_2pass;
-    break;
-#endif /* QUANT_2PASS_SUPPORTED */
-  default:
-    ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-    break;
-  }
-  post->starting_row = post->next_row = 0;
-}
-
-
-/*
- * Process some data in the one-pass (strip buffer) case.
- * This is used for color precision reduction as well as one-pass quantization.
- */
-
-METHODDEF(void)
-post_process_1pass (j_decompress_ptr cinfo,
-		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-		    JDIMENSION in_row_groups_avail,
-		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-		    JDIMENSION out_rows_avail)
-{
-  my_post_ptr post = (my_post_ptr) cinfo->post;
-  JDIMENSION num_rows, max_rows;
-
-  /* Fill the buffer, but not more than what we can dump out in one go. */
-  /* Note we rely on the upsampler to detect bottom of image. */
-  max_rows = out_rows_avail - *out_row_ctr;
-  if (max_rows > post->strip_height)
-    max_rows = post->strip_height;
-  num_rows = 0;
-  (*cinfo->upsample->upsample) (cinfo,
-		input_buf, in_row_group_ctr, in_row_groups_avail,
-		post->buffer, &num_rows, max_rows);
-  /* Quantize and emit data. */
-  (*cinfo->cquantize->color_quantize) (cinfo,
-		post->buffer, output_buf + *out_row_ctr, (int) num_rows);
-  *out_row_ctr += num_rows;
-}
-
-
-#ifdef QUANT_2PASS_SUPPORTED
-
-/*
- * Process some data in the first pass of 2-pass quantization.
- */
-
-METHODDEF(void)
-post_process_prepass (j_decompress_ptr cinfo,
-		      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-		      JDIMENSION in_row_groups_avail,
-		      JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-		      JDIMENSION out_rows_avail)
-{
-  my_post_ptr post = (my_post_ptr) cinfo->post;
-  JDIMENSION old_next_row, num_rows;
-
-  /* Reposition virtual buffer if at start of strip. */
-  if (post->next_row == 0) {
-    post->buffer = (*cinfo->mem->access_virt_sarray)
-	((j_common_ptr) cinfo, post->whole_image,
-	 post->starting_row, post->strip_height, TRUE);
-  }
-
-  /* Upsample some data (up to a strip height's worth). */
-  old_next_row = post->next_row;
-  (*cinfo->upsample->upsample) (cinfo,
-		input_buf, in_row_group_ctr, in_row_groups_avail,
-		post->buffer, &post->next_row, post->strip_height);
-
-  /* Allow quantizer to scan new data.  No data is emitted, */
-  /* but we advance out_row_ctr so outer loop can tell when we're done. */
-  if (post->next_row > old_next_row) {
-    num_rows = post->next_row - old_next_row;
-    (*cinfo->cquantize->color_quantize) (cinfo, post->buffer + old_next_row,
-					 (JSAMPARRAY) NULL, (int) num_rows);
-    *out_row_ctr += num_rows;
-  }
-
-  /* Advance if we filled the strip. */
-  if (post->next_row >= post->strip_height) {
-    post->starting_row += post->strip_height;
-    post->next_row = 0;
-  }
-}
-
-
-/*
- * Process some data in the second pass of 2-pass quantization.
- */
-
-METHODDEF(void)
-post_process_2pass (j_decompress_ptr cinfo,
-		    JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-		    JDIMENSION in_row_groups_avail,
-		    JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-		    JDIMENSION out_rows_avail)
-{
-  my_post_ptr post = (my_post_ptr) cinfo->post;
-  JDIMENSION num_rows, max_rows;
-
-  /* Reposition virtual buffer if at start of strip. */
-  if (post->next_row == 0) {
-    post->buffer = (*cinfo->mem->access_virt_sarray)
-	((j_common_ptr) cinfo, post->whole_image,
-	 post->starting_row, post->strip_height, FALSE);
-  }
-
-  /* Determine number of rows to emit. */
-  num_rows = post->strip_height - post->next_row; /* available in strip */
-  max_rows = out_rows_avail - *out_row_ctr; /* available in output area */
-  if (num_rows > max_rows)
-    num_rows = max_rows;
-  /* We have to check bottom of image here, can't depend on upsampler. */
-  max_rows = cinfo->output_height - post->starting_row;
-  if (num_rows > max_rows)
-    num_rows = max_rows;
-
-  /* Quantize and emit data. */
-  (*cinfo->cquantize->color_quantize) (cinfo,
-		post->buffer + post->next_row, output_buf + *out_row_ctr,
-		(int) num_rows);
-  *out_row_ctr += num_rows;
-
-  /* Advance if we filled the strip. */
-  post->next_row += num_rows;
-  if (post->next_row >= post->strip_height) {
-    post->starting_row += post->strip_height;
-    post->next_row = 0;
-  }
-}
-
-#endif /* QUANT_2PASS_SUPPORTED */
-
-
-/*
- * Initialize postprocessing controller.
- */
-
-GLOBAL(void)
-jinit_d_post_controller (j_decompress_ptr cinfo, boolean need_full_buffer)
-{
-  my_post_ptr post;
-
-  post = (my_post_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_post_controller));
-  cinfo->post = (struct jpeg_d_post_controller *) post;
-  post->pub.start_pass = start_pass_dpost;
-  post->whole_image = NULL;	/* flag for no virtual arrays */
-  post->buffer = NULL;		/* flag for no strip buffer */
-
-  /* Create the quantization buffer, if needed */
-  if (cinfo->quantize_colors) {
-    /* The buffer strip height is max_v_samp_factor, which is typically
-     * an efficient number of rows for upsampling to return.
-     * (In the presence of output rescaling, we might want to be smarter?)
-     */
-    post->strip_height = (JDIMENSION) cinfo->max_v_samp_factor;
-    if (need_full_buffer) {
-      /* Two-pass color quantization: need full-image storage. */
-      /* We round up the number of rows to a multiple of the strip height. */
-#ifdef QUANT_2PASS_SUPPORTED
-      post->whole_image = (*cinfo->mem->request_virt_sarray)
-	((j_common_ptr) cinfo, JPOOL_IMAGE, FALSE,
-	 cinfo->output_width * cinfo->out_color_components,
-	 (JDIMENSION) jround_up((long) cinfo->output_height,
-				(long) post->strip_height),
-	 post->strip_height);
-#else
-      ERREXIT(cinfo, JERR_BAD_BUFFER_MODE);
-#endif /* QUANT_2PASS_SUPPORTED */
-    } else {
-      /* One-pass color quantization: just make a strip buffer. */
-      post->buffer = (*cinfo->mem->alloc_sarray)
-	((j_common_ptr) cinfo, JPOOL_IMAGE,
-	 cinfo->output_width * cinfo->out_color_components,
-	 post->strip_height);
-    }
-  }
-}

cde/lib/DtHelp/jpeg/jdsample.c

@@ -1,501 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdsample.c /main/2 1996/05/09 03:49:53 drk $ */
-/*
- * jdsample.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains upsampling routines.
- *
- * Upsampling input data is counted in "row groups".  A row group
- * is defined to be (v_samp_factor * DCT_scaled_size / min_DCT_scaled_size)
- * sample rows of each component.  Upsampling will normally produce
- * max_v_samp_factor pixel rows from each row group (but this could vary
- * if the upsampler is applying a scale factor of its own).
- *
- * An excellent reference for image resampling is
- *   Digital Image Warping, George Wolberg, 1990.
- *   Pub. by IEEE Computer Society Press, Los Alamitos, CA. ISBN 0-8186-8944-7.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Pointer to routine to upsample a single component */
-typedef JMETHOD(void, upsample1_ptr,
-		(j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		 JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr));
-
-/* Private subobject */
-
-typedef struct {
-  struct jpeg_upsampler pub;	/* public fields */
-
-  /* Color conversion buffer.  When using separate upsampling and color
-   * conversion steps, this buffer holds one upsampled row group until it
-   * has been color converted and output.
-   * Note: we do not allocate any storage for component(s) which are full-size,
-   * ie do not need rescaling.  The corresponding entry of color_buf[] is
-   * simply set to point to the input data array, thereby avoiding copying.
-   */
-  JSAMPARRAY color_buf[MAX_COMPONENTS];
-
-  /* Per-component upsampling method pointers */
-  upsample1_ptr methods[MAX_COMPONENTS];
-
-  int next_row_out;		/* counts rows emitted from color_buf */
-  JDIMENSION rows_to_go;	/* counts rows remaining in image */
-
-  /* Height of an input row group for each component. */
-  int rowgroup_height[MAX_COMPONENTS];
-
-  /* These arrays save pixel expansion factors so that int_expand need not
-   * recompute them each time.  They are unused for other upsampling methods.
-   */
-  UINT8 h_expand[MAX_COMPONENTS];
-  UINT8 v_expand[MAX_COMPONENTS];
-} my_upsampler;
-
-typedef my_upsampler * my_upsample_ptr;
-
-
-/*
- * Initialize for an upsampling pass.
- */
-
-METHODDEF(void)
-start_pass_upsample (j_decompress_ptr cinfo)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-
-  /* Mark the conversion buffer empty */
-  upsample->next_row_out = cinfo->max_v_samp_factor;
-  /* Initialize total-height counter for detecting bottom of image */
-  upsample->rows_to_go = cinfo->output_height;
-}
-
-
-/*
- * Control routine to do upsampling (and color conversion).
- *
- * In this version we upsample each component independently.
- * We upsample one row group into the conversion buffer, then apply
- * color conversion a row at a time.
- */
-
-METHODDEF(void)
-sep_upsample (j_decompress_ptr cinfo,
-	      JSAMPIMAGE input_buf, JDIMENSION *in_row_group_ctr,
-	      JDIMENSION in_row_groups_avail,
-	      JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-	      JDIMENSION out_rows_avail)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  int ci;
-  jpeg_component_info * compptr;
-  JDIMENSION num_rows;
-
-  /* Fill the conversion buffer, if it's empty */
-  if (upsample->next_row_out >= cinfo->max_v_samp_factor) {
-    for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-	 ci++, compptr++) {
-      /* Invoke per-component upsample method.  Notice we pass a POINTER
-       * to color_buf[ci], so that fullsize_upsample can change it.
-       */
-      (*upsample->methods[ci]) (cinfo, compptr,
-	input_buf[ci] + (*in_row_group_ctr * upsample->rowgroup_height[ci]),
-	upsample->color_buf + ci);
-    }
-    upsample->next_row_out = 0;
-  }
-
-  /* Color-convert and emit rows */
-
-  /* How many we have in the buffer: */
-  num_rows = (JDIMENSION) (cinfo->max_v_samp_factor - upsample->next_row_out);
-  /* Not more than the distance to the end of the image.  Need this test
-   * in case the image height is not a multiple of max_v_samp_factor:
-   */
-  if (num_rows > upsample->rows_to_go) 
-    num_rows = upsample->rows_to_go;
-  /* And not more than what the client can accept: */
-  out_rows_avail -= *out_row_ctr;
-  if (num_rows > out_rows_avail)
-    num_rows = out_rows_avail;
-
-  (*cinfo->cconvert->color_convert) (cinfo, upsample->color_buf,
-				     (JDIMENSION) upsample->next_row_out,
-				     output_buf + *out_row_ctr,
-				     (int) num_rows);
-
-  /* Adjust counts */
-  *out_row_ctr += num_rows;
-  upsample->rows_to_go -= num_rows;
-  upsample->next_row_out += num_rows;
-  /* When the buffer is emptied, declare this input row group consumed */
-  if (upsample->next_row_out >= cinfo->max_v_samp_factor)
-    (*in_row_group_ctr)++;
-}
-
-
-/*
- * These are the routines invoked by sep_upsample to upsample pixel values
- * of a single component.  One row group is processed per call.
- */
-
-
-/*
- * For full-size components, we just make color_buf[ci] point at the
- * input buffer, and thus avoid copying any data.  Note that this is
- * safe only because sep_upsample doesn't declare the input row group
- * "consumed" until we are done color converting and emitting it.
- */
-
-METHODDEF(void)
-fullsize_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		   JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  *output_data_ptr = input_data;
-}
-
-
-/*
- * This is a no-op version used for "uninteresting" components.
- * These components will not be referenced by color conversion.
- */
-
-METHODDEF(void)
-noop_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  *output_data_ptr = NULL;	/* safety check */
-}
-
-
-/*
- * This version handles any integral sampling ratios.
- * This is not used for typical JPEG files, so it need not be fast.
- * Nor, for that matter, is it particularly accurate: the algorithm is
- * simple replication of the input pixel onto the corresponding output
- * pixels.  The hi-falutin sampling literature refers to this as a
- * "box filter".  A box filter tends to introduce visible artifacts,
- * so if you are actually going to use 3:1 or 4:1 sampling ratios
- * you would be well advised to improve this code.
- */
-
-METHODDEF(void)
-int_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	      JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  my_upsample_ptr upsample = (my_upsample_ptr) cinfo->upsample;
-  JSAMPARRAY output_data = *output_data_ptr;
-  JSAMPROW inptr, outptr;
-  JSAMPLE invalue;
-  int h;
-  JSAMPROW outend;
-  int h_expand, v_expand;
-  int inrow, outrow;
-
-  h_expand = upsample->h_expand[compptr->component_index];
-  v_expand = upsample->v_expand[compptr->component_index];
-
-  inrow = outrow = 0;
-  while (outrow < cinfo->max_v_samp_factor) {
-    /* Generate one output row with proper horizontal expansion */
-    inptr = input_data[inrow];
-    outptr = output_data[outrow];
-    outend = outptr + cinfo->output_width;
-    while (outptr < outend) {
-      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
-      for (h = h_expand; h > 0; h--) {
-	*outptr++ = invalue;
-      }
-    }
-    /* Generate any additional output rows by duplicating the first one */
-    if (v_expand > 1) {
-      jcopy_sample_rows(output_data, outrow, output_data, outrow+1,
-			v_expand-1, cinfo->output_width);
-    }
-    inrow++;
-    outrow += v_expand;
-  }
-}
-
-
-/*
- * Fast processing for the common case of 2:1 horizontal and 1:1 vertical.
- * It's still a box filter.
- */
-
-METHODDEF(void)
-h2v1_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  JSAMPARRAY output_data = *output_data_ptr;
-  JSAMPROW inptr, outptr;
-  JSAMPLE invalue;
-  JSAMPROW outend;
-  int inrow;
-
-  for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) {
-    inptr = input_data[inrow];
-    outptr = output_data[inrow];
-    outend = outptr + cinfo->output_width;
-    while (outptr < outend) {
-      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
-      *outptr++ = invalue;
-      *outptr++ = invalue;
-    }
-  }
-}
-
-
-/*
- * Fast processing for the common case of 2:1 horizontal and 2:1 vertical.
- * It's still a box filter.
- */
-
-METHODDEF(void)
-h2v2_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  JSAMPARRAY output_data = *output_data_ptr;
-  JSAMPROW inptr, outptr;
-  JSAMPLE invalue;
-  JSAMPROW outend;
-  int inrow, outrow;
-
-  inrow = outrow = 0;
-  while (outrow < cinfo->max_v_samp_factor) {
-    inptr = input_data[inrow];
-    outptr = output_data[outrow];
-    outend = outptr + cinfo->output_width;
-    while (outptr < outend) {
-      invalue = *inptr++;	/* don't need GETJSAMPLE() here */
-      *outptr++ = invalue;
-      *outptr++ = invalue;
-    }
-    jcopy_sample_rows(output_data, outrow, output_data, outrow+1,
-		      1, cinfo->output_width);
-    inrow++;
-    outrow += 2;
-  }
-}
-
-
-/*
- * Fancy processing for the common case of 2:1 horizontal and 1:1 vertical.
- *
- * The upsampling algorithm is linear interpolation between pixel centers,
- * also known as a "triangle filter".  This is a good compromise between
- * speed and visual quality.  The centers of the output pixels are 1/4 and 3/4
- * of the way between input pixel centers.
- *
- * A note about the "bias" calculations: when rounding fractional values to
- * integer, we do not want to always round 0.5 up to the next integer.
- * If we did that, we'd introduce a noticeable bias towards larger values.
- * Instead, this code is arranged so that 0.5 will be rounded up or down at
- * alternate pixel locations (a simple ordered dither pattern).
- */
-
-METHODDEF(void)
-h2v1_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  JSAMPARRAY output_data = *output_data_ptr;
-  JSAMPROW inptr, outptr;
-  int invalue;
-  JDIMENSION colctr;
-  int inrow;
-
-  for (inrow = 0; inrow < cinfo->max_v_samp_factor; inrow++) {
-    inptr = input_data[inrow];
-    outptr = output_data[inrow];
-    /* Special case for first column */
-    invalue = GETJSAMPLE(*inptr++);
-    *outptr++ = (JSAMPLE) invalue;
-    *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(*inptr) + 2) >> 2);
-
-    for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) {
-      /* General case: 3/4 * nearer pixel + 1/4 * further pixel */
-      invalue = GETJSAMPLE(*inptr++) * 3;
-      *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(inptr[-2]) + 1) >> 2);
-      *outptr++ = (JSAMPLE) ((invalue + GETJSAMPLE(*inptr) + 2) >> 2);
-    }
-
-    /* Special case for last column */
-    invalue = GETJSAMPLE(*inptr);
-    *outptr++ = (JSAMPLE) ((invalue * 3 + GETJSAMPLE(inptr[-1]) + 1) >> 2);
-    *outptr++ = (JSAMPLE) invalue;
-  }
-}
-
-
-/*
- * Fancy processing for the common case of 2:1 horizontal and 2:1 vertical.
- * Again a triangle filter; see comments for h2v1 case, above.
- *
- * It is OK for us to reference the adjacent input rows because we demanded
- * context from the main buffer controller (see initialization code).
- */
-
-METHODDEF(void)
-h2v2_fancy_upsample (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		     JSAMPARRAY input_data, JSAMPARRAY * output_data_ptr)
-{
-  JSAMPARRAY output_data = *output_data_ptr;
-  JSAMPROW inptr0, inptr1, outptr;
-#if BITS_IN_JSAMPLE == 8
-  int thiscolsum, lastcolsum, nextcolsum;
-#else
-  INT32 thiscolsum, lastcolsum, nextcolsum;
-#endif
-  JDIMENSION colctr;
-  int inrow, outrow, v;
-
-  inrow = outrow = 0;
-  while (outrow < cinfo->max_v_samp_factor) {
-    for (v = 0; v < 2; v++) {
-      /* inptr0 points to nearest input row, inptr1 points to next nearest */
-      inptr0 = input_data[inrow];
-      if (v == 0)		/* next nearest is row above */
-	inptr1 = input_data[inrow-1];
-      else			/* next nearest is row below */
-	inptr1 = input_data[inrow+1];
-      outptr = output_data[outrow++];
-
-      /* Special case for first column */
-      thiscolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
-      nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
-      *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 8) >> 4);
-      *outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4);
-      lastcolsum = thiscolsum; thiscolsum = nextcolsum;
-
-      for (colctr = compptr->downsampled_width - 2; colctr > 0; colctr--) {
-	/* General case: 3/4 * nearer pixel + 1/4 * further pixel in each */
-	/* dimension, thus 9/16, 3/16, 3/16, 1/16 overall */
-	nextcolsum = GETJSAMPLE(*inptr0++) * 3 + GETJSAMPLE(*inptr1++);
-	*outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4);
-	*outptr++ = (JSAMPLE) ((thiscolsum * 3 + nextcolsum + 7) >> 4);
-	lastcolsum = thiscolsum; thiscolsum = nextcolsum;
-      }
-
-      /* Special case for last column */
-      *outptr++ = (JSAMPLE) ((thiscolsum * 3 + lastcolsum + 8) >> 4);
-      *outptr++ = (JSAMPLE) ((thiscolsum * 4 + 7) >> 4);
-    }
-    inrow++;
-  }
-}
-
-
-/*
- * Module initialization routine for upsampling.
- */
-
-GLOBAL(void)
-jinit_upsampler (j_decompress_ptr cinfo)
-{
-  my_upsample_ptr upsample;
-  int ci;
-  jpeg_component_info * compptr;
-  boolean need_buffer, do_fancy;
-  int h_in_group, v_in_group, h_out_group, v_out_group;
-
-  upsample = (my_upsample_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_upsampler));
-  cinfo->upsample = (struct jpeg_upsampler *) upsample;
-  upsample->pub.start_pass = start_pass_upsample;
-  upsample->pub.upsample = sep_upsample;
-  upsample->pub.need_context_rows = FALSE; /* until we find out differently */
-
-  if (cinfo->CCIR601_sampling)	/* this isn't supported */
-    ERREXIT(cinfo, JERR_CCIR601_NOTIMPL);
-
-  /* jdmainct.c doesn't support context rows when min_DCT_scaled_size = 1,
-   * so don't ask for it.
-   */
-  do_fancy = cinfo->do_fancy_upsampling && cinfo->min_DCT_scaled_size > 1;
-
-  /* Verify we can handle the sampling factors, select per-component methods,
-   * and create storage as needed.
-   */
-  for (ci = 0, compptr = cinfo->comp_info; ci < cinfo->num_components;
-       ci++, compptr++) {
-    /* Compute size of an "input group" after IDCT scaling.  This many samples
-     * are to be converted to max_h_samp_factor * max_v_samp_factor pixels.
-     */
-    h_in_group = (compptr->h_samp_factor * compptr->DCT_scaled_size) /
-		 cinfo->min_DCT_scaled_size;
-    v_in_group = (compptr->v_samp_factor * compptr->DCT_scaled_size) /
-		 cinfo->min_DCT_scaled_size;
-    h_out_group = cinfo->max_h_samp_factor;
-    v_out_group = cinfo->max_v_samp_factor;
-    upsample->rowgroup_height[ci] = v_in_group; /* save for use later */
-    need_buffer = TRUE;
-    if (! compptr->component_needed) {
-      /* Don't bother to upsample an uninteresting component. */
-      upsample->methods[ci] = noop_upsample;
-      need_buffer = FALSE;
-    } else if (h_in_group == h_out_group && v_in_group == v_out_group) {
-      /* Fullsize components can be processed without any work. */
-      upsample->methods[ci] = fullsize_upsample;
-      need_buffer = FALSE;
-    } else if (h_in_group * 2 == h_out_group &&
-	       v_in_group == v_out_group) {
-      /* Special cases for 2h1v upsampling */
-      if (do_fancy && compptr->downsampled_width > 2)
-	upsample->methods[ci] = h2v1_fancy_upsample;
-      else
-	upsample->methods[ci] = h2v1_upsample;
-    } else if (h_in_group * 2 == h_out_group &&
-	       v_in_group * 2 == v_out_group) {
-      /* Special cases for 2h2v upsampling */
-      if (do_fancy && compptr->downsampled_width > 2) {
-	upsample->methods[ci] = h2v2_fancy_upsample;
-	upsample->pub.need_context_rows = TRUE;
-      } else
-	upsample->methods[ci] = h2v2_upsample;
-    } else if ((h_out_group % h_in_group) == 0 &&
-	       (v_out_group % v_in_group) == 0) {
-      /* Generic integral-factors upsampling method */
-      upsample->methods[ci] = int_upsample;
-      upsample->h_expand[ci] = (UINT8) (h_out_group / h_in_group);
-      upsample->v_expand[ci] = (UINT8) (v_out_group / v_in_group);
-    } else
-      ERREXIT(cinfo, JERR_FRACT_SAMPLE_NOTIMPL);
-    if (need_buffer) {
-      upsample->color_buf[ci] = (*cinfo->mem->alloc_sarray)
-	((j_common_ptr) cinfo, JPOOL_IMAGE,
-	 (JDIMENSION) jround_up((long) cinfo->output_width,
-				(long) cinfo->max_h_samp_factor),
-	 (JDIMENSION) cinfo->max_v_samp_factor);
-    }
-  }
-}

cde/lib/DtHelp/jpeg/jdtrans.c

@@ -1,145 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jdtrans.c /main/2 1996/05/09 03:50:06 drk $ */
-/*
- * jdtrans.c
- *
- * Copyright (C) 1995-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains library routines for transcoding decompression,
- * that is, reading raw DCT coefficient arrays from an input JPEG file.
- * The routines in jdapimin.c will also be needed by a transcoder.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/* Forward declarations */
-LOCAL(void) transdecode_master_selection JPP((j_decompress_ptr cinfo));
-
-
-/*
- * Read the coefficient arrays from a JPEG file.
- * jpeg_read_header must be completed before calling this.
- *
- * The entire image is read into a set of virtual coefficient-block arrays,
- * one per component.  The return value is a pointer to the array of
- * virtual-array descriptors.  These can be manipulated directly via the
- * JPEG memory manager, or handed off to jpeg_write_coefficients().
- * To release the memory occupied by the virtual arrays, call
- * jpeg_finish_decompress() when done with the data.
- *
- * Returns NULL if suspended.  This case need be checked only if
- * a suspending data source is used.
- */
-
-GLOBAL(jvirt_barray_ptr *)
-jpeg_read_coefficients (j_decompress_ptr cinfo)
-{
-  if (cinfo->global_state == DSTATE_READY) {
-    /* First call: initialize active modules */
-    transdecode_master_selection(cinfo);
-    cinfo->global_state = DSTATE_RDCOEFS;
-  } else if (cinfo->global_state != DSTATE_RDCOEFS)
-    ERREXIT1(cinfo, JERR_BAD_STATE, cinfo->global_state);
-  /* Absorb whole file into the coef buffer */
-  for (;;) {
-    int retcode;
-    /* Call progress monitor hook if present */
-    if (cinfo->progress != NULL)
-      (*cinfo->progress->progress_monitor) ((j_common_ptr) cinfo);
-    /* Absorb some more input */
-    retcode = (*cinfo->inputctl->consume_input) (cinfo);
-    if (retcode == JPEG_SUSPENDED)
-      return NULL;
-    if (retcode == JPEG_REACHED_EOI)
-      break;
-    /* Advance progress counter if appropriate */
-    if (cinfo->progress != NULL &&
-	(retcode == JPEG_ROW_COMPLETED || retcode == JPEG_REACHED_SOS)) {
-      if (++cinfo->progress->pass_counter >= cinfo->progress->pass_limit) {
-	/* startup underestimated number of scans; ratchet up one scan */
-	cinfo->progress->pass_limit += (long) cinfo->total_iMCU_rows;
-      }
-    }
-  }
-  /* Set state so that jpeg_finish_decompress does the right thing */
-  cinfo->global_state = DSTATE_STOPPING;
-  return cinfo->coef->coef_arrays;
-}
-
-
-/*
- * Master selection of decompression modules for transcoding.
- * This substitutes for jdmaster.c's initialization of the full decompressor.
- */
-
-LOCAL(void)
-transdecode_master_selection (j_decompress_ptr cinfo)
-{
-  /* Entropy decoding: either Huffman or arithmetic coding. */
-  if (cinfo->arith_code) {
-    ERREXIT(cinfo, JERR_ARITH_NOTIMPL);
-  } else {
-    if (cinfo->progressive_mode) {
-#ifdef D_PROGRESSIVE_SUPPORTED
-      jinit_phuff_decoder(cinfo);
-#else
-      ERREXIT(cinfo, JERR_NOT_COMPILED);
-#endif
-    } else
-      jinit_huff_decoder(cinfo);
-  }
-
-  /* Always get a full-image coefficient buffer. */
-  jinit_d_coef_controller(cinfo, TRUE);
-
-  /* We can now tell the memory manager to allocate virtual arrays. */
-  (*cinfo->mem->realize_virt_arrays) ((j_common_ptr) cinfo);
-
-  /* Initialize input side of decompressor to consume first scan. */
-  (*cinfo->inputctl->start_input_pass) (cinfo);
-
-  /* Initialize progress monitoring. */
-  if (cinfo->progress != NULL) {
-    int nscans;
-    /* Estimate number of scans to set pass_limit. */
-    if (cinfo->progressive_mode) {
-      /* Arbitrarily estimate 2 interleaved DC scans + 3 AC scans/component. */
-      nscans = 2 + 3 * cinfo->num_components;
-    } else if (cinfo->inputctl->has_multiple_scans) {
-      /* For a nonprogressive multiscan file, estimate 1 scan per component. */
-      nscans = cinfo->num_components;
-    } else {
-      nscans = 1;
-    }
-    cinfo->progress->pass_counter = 0L;
-    cinfo->progress->pass_limit = (long) cinfo->total_iMCU_rows * nscans;
-    cinfo->progress->completed_passes = 0;
-    cinfo->progress->total_passes = 1;
-  }
-}

cde/lib/DtHelp/jpeg/jerror.c

@@ -1,251 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jerror.c /main/2 1996/05/09 03:50:22 drk $ */
-/*
- * jerror.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains simple error-reporting and trace-message routines.
- * These are suitable for Unix-like systems and others where writing to
- * stderr is the right thing to do.  Many applications will want to replace
- * some or all of these routines.
- *
- * These routines are used by both the compression and decompression code.
- */
-
-/* this is not a core library module, so it doesn't define JPEG_INTERNALS */
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jversion.h"
-#include "jerror.h"
-
-#ifndef EXIT_FAILURE		/* define exit() codes if not provided */
-#define EXIT_FAILURE  1
-#endif
-
-
-/*
- * Create the message string table.
- * We do this from the master message list in jerror.h by re-reading
- * jerror.h with a suitable definition for macro JMESSAGE.
- * The message table is made an external symbol just in case any applications
- * want to refer to it directly.
- */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_std_message_table	jMsgTable
-#endif
-
-#define JMESSAGE(code,string)	string ,
-
-const char * const jpeg_std_message_table[] = {
-#include "jerror.h"
-  NULL
-};
-
-
-/*
- * Error exit handler: must not return to caller.
- *
- * Applications may override this if they want to get control back after
- * an error.  Typically one would longjmp somewhere instead of exiting.
- * The setjmp buffer can be made a private field within an expanded error
- * handler object.  Note that the info needed to generate an error message
- * is stored in the error object, so you can generate the message now or
- * later, at your convenience.
- * You should make sure that the JPEG object is cleaned up (with jpeg_abort
- * or jpeg_destroy) at some point.
- */
-
-METHODDEF(void)
-error_exit (j_common_ptr cinfo)
-{
-  /* Always display the message */
-  (*cinfo->err->output_message) (cinfo);
-
-  /* Let the memory manager delete any temp files before we die */
-  jpeg_destroy(cinfo);
-
-  exit(EXIT_FAILURE);
-}
-
-
-/*
- * Actual output of an error or trace message.
- * Applications may override this method to send JPEG messages somewhere
- * other than stderr.
- */
-
-METHODDEF(void)
-output_message (j_common_ptr cinfo)
-{
-  char buffer[JMSG_LENGTH_MAX];
-
-  /* Create the message */
-  (*cinfo->err->format_message) (cinfo, buffer);
-
-  /* Send it to stderr, adding a newline */
-  fprintf(stderr, "%s\n", buffer);
-}
-
-
-/*
- * Decide whether to emit a trace or warning message.
- * msg_level is one of:
- *   -1: recoverable corrupt-data warning, may want to abort.
- *    0: important advisory messages (always display to user).
- *    1: first level of tracing detail.
- *    2,3,...: successively more detailed tracing messages.
- * An application might override this method if it wanted to abort on warnings
- * or change the policy about which messages to display.
- */
-
-METHODDEF(void)
-emit_message (j_common_ptr cinfo, int msg_level)
-{
-  struct jpeg_error_mgr * err = cinfo->err;
-
-  if (msg_level < 0) {
-    /* It's a warning message.  Since corrupt files may generate many warnings,
-     * the policy implemented here is to show only the first warning,
-     * unless trace_level >= 3.
-     */
-    if (err->num_warnings == 0 || err->trace_level >= 3)
-      (*err->output_message) (cinfo);
-    /* Always count warnings in num_warnings. */
-    err->num_warnings++;
-  } else {
-    /* It's a trace message.  Show it if trace_level >= msg_level. */
-    if (err->trace_level >= msg_level)
-      (*err->output_message) (cinfo);
-  }
-}
-
-
-/*
- * Format a message string for the most recent JPEG error or message.
- * The message is stored into buffer, which should be at least JMSG_LENGTH_MAX
- * characters.  Note that no '\n' character is added to the string.
- * Few applications should need to override this method.
- */
-
-METHODDEF(void)
-format_message (j_common_ptr cinfo, char * buffer)
-{
-  struct jpeg_error_mgr * err = cinfo->err;
-  int msg_code = err->msg_code;
-  const char * msgtext = NULL;
-  const char * msgptr;
-  char ch;
-  boolean isstring;
-
-  /* Look up message string in proper table */
-  if (msg_code > 0 && msg_code <= err->last_jpeg_message) {
-    msgtext = err->jpeg_message_table[msg_code];
-  } else if (err->addon_message_table != NULL &&
-	     msg_code >= err->first_addon_message &&
-	     msg_code <= err->last_addon_message) {
-    msgtext = err->addon_message_table[msg_code - err->first_addon_message];
-  }
-
-  /* Defend against bogus message number */
-  if (msgtext == NULL) {
-    err->msg_parm.i[0] = msg_code;
-    msgtext = err->jpeg_message_table[0];
-  }
-
-  /* Check for string parameter, as indicated by %s in the message text */
-  isstring = FALSE;
-  msgptr = msgtext;
-  while ((ch = *msgptr++) != '\0') {
-    if (ch == '%') {
-      if (*msgptr == 's') isstring = TRUE;
-      break;
-    }
-  }
-
-  /* Format the message into the passed buffer */
-  if (isstring)
-    sprintf(buffer, msgtext, err->msg_parm.s);
-  else
-    sprintf(buffer, msgtext,
-	    err->msg_parm.i[0], err->msg_parm.i[1],
-	    err->msg_parm.i[2], err->msg_parm.i[3],
-	    err->msg_parm.i[4], err->msg_parm.i[5],
-	    err->msg_parm.i[6], err->msg_parm.i[7]);
-}
-
-
-/*
- * Reset error state variables at start of a new image.
- * This is called during compression startup to reset trace/error
- * processing to default state, without losing any application-specific
- * method pointers.  An application might possibly want to override
- * this method if it has additional error processing state.
- */
-
-METHODDEF(void)
-reset_error_mgr (j_common_ptr cinfo)
-{
-  cinfo->err->num_warnings = 0;
-  /* trace_level is not reset since it is an application-supplied parameter */
-  cinfo->err->msg_code = 0;	/* may be useful as a flag for "no error" */
-}
-
-
-/*
- * Fill in the standard error-handling methods in a jpeg_error_mgr object.
- * Typical call is:
- *	struct jpeg_compress_struct cinfo;
- *	struct jpeg_error_mgr err;
- *
- *	cinfo.err = jpeg_std_error(&err);
- * after which the application may override some of the methods.
- */
-
-GLOBAL(struct jpeg_error_mgr *)
-jpeg_std_error (struct jpeg_error_mgr * err)
-{
-  err->error_exit = error_exit;
-  err->emit_message = emit_message;
-  err->output_message = output_message;
-  err->format_message = format_message;
-  err->reset_error_mgr = reset_error_mgr;
-
-  err->trace_level = 0;		/* default = no tracing */
-  err->num_warnings = 0;	/* no warnings emitted yet */
-  err->msg_code = 0;		/* may be useful as a flag for "no error" */
-
-  /* Initialize message table pointers */
-  err->jpeg_message_table = jpeg_std_message_table;
-  err->last_jpeg_message = (int) JMSG_LASTMSGCODE - 1;
-
-  err->addon_message_table = NULL;
-  err->first_addon_message = 0;	/* for safety */
-  err->last_addon_message = 0;
-
-  return err;
-}

cde/lib/DtHelp/jpeg/jerror.h

@@ -1,300 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jerror.h /main/2 1996/05/09 03:50:36 drk $ */
-/*
- * jerror.h
- *
- * Copyright (C) 1994-1995, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file defines the error and message codes for the JPEG library.
- * Edit this file to add new codes, or to translate the message strings to
- * some other language.
- * A set of error-reporting macros are defined too.  Some applications using
- * the JPEG library may wish to include this file to get the error codes
- * and/or the macros.
- */
-
-/*
- * To define the enum list of message codes, include this file without
- * defining macro JMESSAGE.  To create a message string table, include it
- * again with a suitable JMESSAGE definition (see jerror.c for an example).
- */
-#ifndef JMESSAGE
-#ifndef JERROR_H
-/* First time through, define the enum list */
-#define JMAKE_ENUM_LIST
-#else
-/* Repeated inclusions of this file are no-ops unless JMESSAGE is defined */
-#define JMESSAGE(code,string)
-#endif /* JERROR_H */
-#endif /* JMESSAGE */
-
-#ifdef JMAKE_ENUM_LIST
-
-typedef enum {
-
-#define JMESSAGE(code,string)	code ,
-
-#endif /* JMAKE_ENUM_LIST */
-
-JMESSAGE(JMSG_NOMESSAGE, "Bogus message code %d") /* Must be first entry! */
-
-/* For maintenance convenience, list is alphabetical by message code name */
-JMESSAGE(JERR_ARITH_NOTIMPL,
-	 "Sorry, there are legal restrictions on arithmetic coding")
-JMESSAGE(JERR_BAD_ALIGN_TYPE, "ALIGN_TYPE is wrong, please fix")
-JMESSAGE(JERR_BAD_ALLOC_CHUNK, "MAX_ALLOC_CHUNK is wrong, please fix")
-JMESSAGE(JERR_BAD_BUFFER_MODE, "Bogus buffer control mode")
-JMESSAGE(JERR_BAD_COMPONENT_ID, "Invalid component ID %d in SOS")
-JMESSAGE(JERR_BAD_DCTSIZE, "IDCT output block size %d not supported")
-JMESSAGE(JERR_BAD_IN_COLORSPACE, "Bogus input colorspace")
-JMESSAGE(JERR_BAD_J_COLORSPACE, "Bogus JPEG colorspace")
-JMESSAGE(JERR_BAD_LENGTH, "Bogus marker length")
-JMESSAGE(JERR_BAD_LIB_VERSION,
-	 "Wrong JPEG library version: library is %d, caller expects %d")
-JMESSAGE(JERR_BAD_MCU_SIZE, "Sampling factors too large for interleaved scan")
-JMESSAGE(JERR_BAD_POOL_ID, "Invalid memory pool code %d")
-JMESSAGE(JERR_BAD_PRECISION, "Unsupported JPEG data precision %d")
-JMESSAGE(JERR_BAD_PROGRESSION,
-	 "Invalid progressive parameters Ss=%d Se=%d Ah=%d Al=%d")
-JMESSAGE(JERR_BAD_PROG_SCRIPT,
-	 "Invalid progressive parameters at scan script entry %d")
-JMESSAGE(JERR_BAD_SAMPLING, "Bogus sampling factors")
-JMESSAGE(JERR_BAD_SCAN_SCRIPT, "Invalid scan script at entry %d")
-JMESSAGE(JERR_BAD_STATE, "Improper call to JPEG library in state %d")
-JMESSAGE(JERR_BAD_STRUCT_SIZE,
-	 "JPEG parameter struct mismatch: library thinks size is %u, caller expects %u")
-JMESSAGE(JERR_BAD_VIRTUAL_ACCESS, "Bogus virtual array access")
-JMESSAGE(JERR_BUFFER_SIZE, "Buffer passed to JPEG library is too small")
-JMESSAGE(JERR_CANT_SUSPEND, "Suspension not allowed here")
-JMESSAGE(JERR_CCIR601_NOTIMPL, "CCIR601 sampling not implemented yet")
-JMESSAGE(JERR_COMPONENT_COUNT, "Too many color components: %d, max %d")
-JMESSAGE(JERR_CONVERSION_NOTIMPL, "Unsupported color conversion request")
-JMESSAGE(JERR_DAC_INDEX, "Bogus DAC index %d")
-JMESSAGE(JERR_DAC_VALUE, "Bogus DAC value 0x%x")
-JMESSAGE(JERR_DHT_COUNTS, "Bogus DHT counts")
-JMESSAGE(JERR_DHT_INDEX, "Bogus DHT index %d")
-JMESSAGE(JERR_DQT_INDEX, "Bogus DQT index %d")
-JMESSAGE(JERR_EMPTY_IMAGE, "Empty JPEG image (DNL not supported)")
-JMESSAGE(JERR_EMS_READ, "Read from EMS failed")
-JMESSAGE(JERR_EMS_WRITE, "Write to EMS failed")
-JMESSAGE(JERR_EOI_EXPECTED, "Didn't expect more than one scan")
-JMESSAGE(JERR_FILE_READ, "Input file read error")
-JMESSAGE(JERR_FILE_WRITE, "Output file write error --- out of disk space?")
-JMESSAGE(JERR_FRACT_SAMPLE_NOTIMPL, "Fractional sampling not implemented yet")
-JMESSAGE(JERR_HUFF_CLEN_OVERFLOW, "Huffman code size table overflow")
-JMESSAGE(JERR_HUFF_MISSING_CODE, "Missing Huffman code table entry")
-JMESSAGE(JERR_IMAGE_TOO_BIG, "Maximum supported image dimension is %u pixels")
-JMESSAGE(JERR_INPUT_EMPTY, "Empty input file")
-JMESSAGE(JERR_INPUT_EOF, "Premature end of input file")
-JMESSAGE(JERR_MISMATCHED_QUANT_TABLE,
-	 "Cannot transcode due to multiple use of quantization table %d")
-JMESSAGE(JERR_MISSING_DATA, "Scan script does not transmit all data")
-JMESSAGE(JERR_MODE_CHANGE, "Invalid color quantization mode change")
-JMESSAGE(JERR_NOTIMPL, "Not implemented yet")
-JMESSAGE(JERR_NOT_COMPILED, "Requested feature was omitted at compile time")
-JMESSAGE(JERR_NO_BACKING_STORE, "Backing store not supported")
-JMESSAGE(JERR_NO_HUFF_TABLE, "Huffman table 0x%02x was not defined")
-JMESSAGE(JERR_NO_IMAGE, "JPEG datastream contains no image")
-JMESSAGE(JERR_NO_QUANT_TABLE, "Quantization table 0x%02x was not defined")
-JMESSAGE(JERR_NO_SOI, "Not a JPEG file: starts with 0x%02x 0x%02x")
-JMESSAGE(JERR_OUT_OF_MEMORY, "Insufficient memory (case %d)")
-JMESSAGE(JERR_QUANT_COMPONENTS,
-	 "Cannot quantize more than %d color components")
-JMESSAGE(JERR_QUANT_FEW_COLORS, "Cannot quantize to fewer than %d colors")
-JMESSAGE(JERR_QUANT_MANY_COLORS, "Cannot quantize to more than %d colors")
-JMESSAGE(JERR_SOF_DUPLICATE, "Invalid JPEG file structure: two SOF markers")
-JMESSAGE(JERR_SOF_NO_SOS, "Invalid JPEG file structure: missing SOS marker")
-JMESSAGE(JERR_SOF_UNSUPPORTED, "Unsupported JPEG process: SOF type 0x%02x")
-JMESSAGE(JERR_SOI_DUPLICATE, "Invalid JPEG file structure: two SOI markers")
-JMESSAGE(JERR_SOS_NO_SOF, "Invalid JPEG file structure: SOS before SOF")
-JMESSAGE(JERR_TFILE_CREATE, "Failed to create temporary file %s")
-JMESSAGE(JERR_TFILE_READ, "Read failed on temporary file")
-JMESSAGE(JERR_TFILE_SEEK, "Seek failed on temporary file")
-JMESSAGE(JERR_TFILE_WRITE,
-	 "Write failed on temporary file --- out of disk space?")
-JMESSAGE(JERR_TOO_LITTLE_DATA, "Application transferred too few scanlines")
-JMESSAGE(JERR_UNKNOWN_MARKER, "Unsupported marker type 0x%02x")
-JMESSAGE(JERR_VIRTUAL_BUG, "Virtual array controller messed up")
-JMESSAGE(JERR_WIDTH_OVERFLOW, "Image too wide for this implementation")
-JMESSAGE(JERR_XMS_READ, "Read from XMS failed")
-JMESSAGE(JERR_XMS_WRITE, "Write to XMS failed")
-JMESSAGE(JMSG_COPYRIGHT, JCOPYRIGHT)
-JMESSAGE(JMSG_VERSION, JVERSION)
-JMESSAGE(JTRC_16BIT_TABLES,
-	 "Caution: quantization tables are too coarse for baseline JPEG")
-JMESSAGE(JTRC_ADOBE,
-	 "Adobe APP14 marker: version %d, flags 0x%04x 0x%04x, transform %d")
-JMESSAGE(JTRC_APP0, "Unknown APP0 marker (not JFIF), length %u")
-JMESSAGE(JTRC_APP14, "Unknown APP14 marker (not Adobe), length %u")
-JMESSAGE(JTRC_DAC, "Define Arithmetic Table 0x%02x: 0x%02x")
-JMESSAGE(JTRC_DHT, "Define Huffman Table 0x%02x")
-JMESSAGE(JTRC_DQT, "Define Quantization Table %d  precision %d")
-JMESSAGE(JTRC_DRI, "Define Restart Interval %u")
-JMESSAGE(JTRC_EMS_CLOSE, "Freed EMS handle %u")
-JMESSAGE(JTRC_EMS_OPEN, "Obtained EMS handle %u")
-JMESSAGE(JTRC_EOI, "End Of Image")
-JMESSAGE(JTRC_HUFFBITS, "        %3d %3d %3d %3d %3d %3d %3d %3d")
-JMESSAGE(JTRC_JFIF, "JFIF APP0 marker, density %dx%d  %d")
-JMESSAGE(JTRC_JFIF_BADTHUMBNAILSIZE,
-	 "Warning: thumbnail image size does not match data length %u")
-JMESSAGE(JTRC_JFIF_MINOR, "Unknown JFIF minor revision number %d.%02d")
-JMESSAGE(JTRC_JFIF_THUMBNAIL, "    with %d x %d thumbnail image")
-JMESSAGE(JTRC_MISC_MARKER, "Skipping marker 0x%02x, length %u")
-JMESSAGE(JTRC_PARMLESS_MARKER, "Unexpected marker 0x%02x")
-JMESSAGE(JTRC_QUANTVALS, "        %4u %4u %4u %4u %4u %4u %4u %4u")
-JMESSAGE(JTRC_QUANT_3_NCOLORS, "Quantizing to %d = %d*%d*%d colors")
-JMESSAGE(JTRC_QUANT_NCOLORS, "Quantizing to %d colors")
-JMESSAGE(JTRC_QUANT_SELECTED, "Selected %d colors for quantization")
-JMESSAGE(JTRC_RECOVERY_ACTION, "At marker 0x%02x, recovery action %d")
-JMESSAGE(JTRC_RST, "RST%d")
-JMESSAGE(JTRC_SMOOTH_NOTIMPL,
-	 "Smoothing not supported with nonstandard sampling ratios")
-JMESSAGE(JTRC_SOF, "Start Of Frame 0x%02x: width=%u, height=%u, components=%d")
-JMESSAGE(JTRC_SOF_COMPONENT, "    Component %d: %dhx%dv q=%d")
-JMESSAGE(JTRC_SOI, "Start of Image")
-JMESSAGE(JTRC_SOS, "Start Of Scan: %d components")
-JMESSAGE(JTRC_SOS_COMPONENT, "    Component %d: dc=%d ac=%d")
-JMESSAGE(JTRC_SOS_PARAMS, "  Ss=%d, Se=%d, Ah=%d, Al=%d")
-JMESSAGE(JTRC_TFILE_CLOSE, "Closed temporary file %s")
-JMESSAGE(JTRC_TFILE_OPEN, "Opened temporary file %s")
-JMESSAGE(JTRC_UNKNOWN_IDS,
-	 "Unrecognized component IDs %d %d %d, assuming YCbCr")
-JMESSAGE(JTRC_XMS_CLOSE, "Freed XMS handle %u")
-JMESSAGE(JTRC_XMS_OPEN, "Obtained XMS handle %u")
-JMESSAGE(JWRN_ADOBE_XFORM, "Unknown Adobe color transform code %d")
-JMESSAGE(JWRN_BOGUS_PROGRESSION,
-	 "Inconsistent progression sequence for component %d coefficient %d")
-JMESSAGE(JWRN_EXTRANEOUS_DATA,
-	 "Corrupt JPEG data: %u extraneous bytes before marker 0x%02x")
-JMESSAGE(JWRN_HIT_MARKER, "Corrupt JPEG data: premature end of data segment")
-JMESSAGE(JWRN_HUFF_BAD_CODE, "Corrupt JPEG data: bad Huffman code")
-JMESSAGE(JWRN_JFIF_MAJOR, "Warning: unknown JFIF revision number %d.%02d")
-JMESSAGE(JWRN_JPEG_EOF, "Premature end of JPEG file")
-JMESSAGE(JWRN_MUST_RESYNC,
-	 "Corrupt JPEG data: found marker 0x%02x instead of RST%d")
-JMESSAGE(JWRN_NOT_SEQUENTIAL, "Invalid SOS parameters for sequential JPEG")
-JMESSAGE(JWRN_TOO_MUCH_DATA, "Application transferred too many scanlines")
-
-#ifdef JMAKE_ENUM_LIST
-
-  JMSG_LASTMSGCODE
-} J_MESSAGE_CODE;
-
-#undef JMAKE_ENUM_LIST
-#endif /* JMAKE_ENUM_LIST */
-
-/* Zap JMESSAGE macro so that future re-inclusions do nothing by default */
-#undef JMESSAGE
-
-
-#ifndef JERROR_H
-#define JERROR_H
-
-/* Macros to simplify using the error and trace message stuff */
-/* The first parameter is either type of cinfo pointer */
-
-/* Fatal errors (print message and exit) */
-#define ERREXIT(cinfo,code)  \
-  ((cinfo)->err->msg_code = (code), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-#define ERREXIT1(cinfo,code,p1)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-#define ERREXIT2(cinfo,code,p1,p2)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (cinfo)->err->msg_parm.i[1] = (p2), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-#define ERREXIT3(cinfo,code,p1,p2,p3)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (cinfo)->err->msg_parm.i[1] = (p2), \
-   (cinfo)->err->msg_parm.i[2] = (p3), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-#define ERREXIT4(cinfo,code,p1,p2,p3,p4)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (cinfo)->err->msg_parm.i[1] = (p2), \
-   (cinfo)->err->msg_parm.i[2] = (p3), \
-   (cinfo)->err->msg_parm.i[3] = (p4), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-#define ERREXITS(cinfo,code,str)  \
-  ((cinfo)->err->msg_code = (code), \
-   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
-   (*(cinfo)->err->error_exit) ((j_common_ptr) (cinfo)))
-
-#define MAKESTMT(stuff)		do { stuff } while (0)
-
-/* Nonfatal errors (we can keep going, but the data is probably corrupt) */
-#define WARNMS(cinfo,code)  \
-  ((cinfo)->err->msg_code = (code), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
-#define WARNMS1(cinfo,code,p1)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
-#define WARNMS2(cinfo,code,p1,p2)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (cinfo)->err->msg_parm.i[1] = (p2), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), -1))
-
-/* Informational/debugging messages */
-#define TRACEMS(cinfo,lvl,code)  \
-  ((cinfo)->err->msg_code = (code), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
-#define TRACEMS1(cinfo,lvl,code,p1)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
-#define TRACEMS2(cinfo,lvl,code,p1,p2)  \
-  ((cinfo)->err->msg_code = (code), \
-   (cinfo)->err->msg_parm.i[0] = (p1), \
-   (cinfo)->err->msg_parm.i[1] = (p2), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
-#define TRACEMS3(cinfo,lvl,code,p1,p2,p3)  \
-  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
-	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); \
-	   (cinfo)->err->msg_code = (code); \
-	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
-#define TRACEMS4(cinfo,lvl,code,p1,p2,p3,p4)  \
-  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
-	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
-	   (cinfo)->err->msg_code = (code); \
-	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
-#define TRACEMS8(cinfo,lvl,code,p1,p2,p3,p4,p5,p6,p7,p8)  \
-  MAKESTMT(int * _mp = (cinfo)->err->msg_parm.i; \
-	   _mp[0] = (p1); _mp[1] = (p2); _mp[2] = (p3); _mp[3] = (p4); \
-	   _mp[4] = (p5); _mp[5] = (p6); _mp[6] = (p7); _mp[7] = (p8); \
-	   (cinfo)->err->msg_code = (code); \
-	   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)); )
-#define TRACEMSS(cinfo,lvl,code,str)  \
-  ((cinfo)->err->msg_code = (code), \
-   strncpy((cinfo)->err->msg_parm.s, (str), JMSG_STR_PARM_MAX), \
-   (*(cinfo)->err->emit_message) ((j_common_ptr) (cinfo), (lvl)))
-
-#endif /* JERROR_H */

cde/lib/DtHelp/jpeg/jidctflt.c

@@ -1,264 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jidctflt.c /main/2 1996/05/09 03:50:55 drk $ */
-/*
- * jidctflt.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a floating-point implementation of the
- * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
- * must also perform dequantization of the input coefficients.
- *
- * This implementation should be more accurate than either of the integer
- * IDCT implementations.  However, it may not give the same results on all
- * machines because of differences in roundoff behavior.  Speed will depend
- * on the hardware's floating point capacity.
- *
- * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
- * on each row (or vice versa, but it's more convenient to emit a row at
- * a time).  Direct algorithms are also available, but they are much more
- * complex and seem not to be any faster when reduced to code.
- *
- * This implementation is based on Arai, Agui, and Nakajima's algorithm for
- * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
- * Japanese, but the algorithm is described in the Pennebaker & Mitchell
- * JPEG textbook (see REFERENCES section in file README).  The following code
- * is based directly on figure 4-8 in P&M.
- * While an 8-point DCT cannot be done in less than 11 multiplies, it is
- * possible to arrange the computation so that many of the multiplies are
- * simple scalings of the final outputs.  These multiplies can then be
- * folded into the multiplications or divisions by the JPEG quantization
- * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
- * to be done in the DCT itself.
- * The primary disadvantage of this method is that with a fixed-point
- * implementation, accuracy is lost due to imprecise representation of the
- * scaled quantization values.  However, that problem does not arise if
- * we use floating point arithmetic.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h"		/* Private declarations for DCT subsystem */
-
-#ifdef DCT_FLOAT_SUPPORTED
-
-
-/*
- * This module is specialized to the case DCTSIZE = 8.
- */
-
-#if DCTSIZE != 8
-  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
-#endif
-
-
-/* Dequantize a coefficient by multiplying it by the multiplier-table
- * entry; produce a float result.
- */
-
-#define DEQUANTIZE(coef,quantval)  (((FAST_FLOAT) (coef)) * (quantval))
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients.
- */
-
-GLOBAL(void)
-jpeg_idct_float (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		 JCOEFPTR coef_block,
-		 JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  FAST_FLOAT tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  FAST_FLOAT tmp10, tmp11, tmp12, tmp13;
-  FAST_FLOAT z5, z10, z11, z12, z13;
-  JCOEFPTR inptr;
-  FLOAT_MULT_TYPE * quantptr;
-  FAST_FLOAT * wsptr;
-  JSAMPROW outptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  int ctr;
-  FAST_FLOAT workspace[DCTSIZE2]; /* buffers data between passes */
-  SHIFT_TEMPS
-
-  /* Pass 1: process columns from input, store into work array. */
-
-  inptr = coef_block;
-  quantptr = (FLOAT_MULT_TYPE *) compptr->dct_table;
-  wsptr = workspace;
-  for (ctr = DCTSIZE; ctr > 0; ctr--) {
-    /* Due to quantization, we will usually find that many of the input
-     * coefficients are zero, especially the AC terms.  We can exploit this
-     * by short-circuiting the IDCT calculation for any column in which all
-     * the AC terms are zero.  In that case each output is equal to the
-     * DC coefficient (with scale factor as needed).
-     * With typical images and quantization tables, half or more of the
-     * column DCT calculations can be simplified this way.
-     */
-    
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
-      /* AC terms all zero */
-      FAST_FLOAT dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-      
-      wsptr[DCTSIZE*0] = dcval;
-      wsptr[DCTSIZE*1] = dcval;
-      wsptr[DCTSIZE*2] = dcval;
-      wsptr[DCTSIZE*3] = dcval;
-      wsptr[DCTSIZE*4] = dcval;
-      wsptr[DCTSIZE*5] = dcval;
-      wsptr[DCTSIZE*6] = dcval;
-      wsptr[DCTSIZE*7] = dcval;
-      
-      inptr++;			/* advance pointers to next column */
-      quantptr++;
-      wsptr++;
-      continue;
-    }
-    
-    /* Even part */
-
-    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-    tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
-    tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
-    tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-
-    tmp10 = tmp0 + tmp2;	/* phase 3 */
-    tmp11 = tmp0 - tmp2;
-
-    tmp13 = tmp1 + tmp3;	/* phases 5-3 */
-    tmp12 = (tmp1 - tmp3) * ((FAST_FLOAT) 1.414213562) - tmp13; /* 2*c4 */
-
-    tmp0 = tmp10 + tmp13;	/* phase 2 */
-    tmp3 = tmp10 - tmp13;
-    tmp1 = tmp11 + tmp12;
-    tmp2 = tmp11 - tmp12;
-    
-    /* Odd part */
-
-    tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-    tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-    tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-    tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-
-    z13 = tmp6 + tmp5;		/* phase 6 */
-    z10 = tmp6 - tmp5;
-    z11 = tmp4 + tmp7;
-    z12 = tmp4 - tmp7;
-
-    tmp7 = z11 + z13;		/* phase 5 */
-    tmp11 = (z11 - z13) * ((FAST_FLOAT) 1.414213562); /* 2*c4 */
-
-    z5 = (z10 + z12) * ((FAST_FLOAT) 1.847759065); /* 2*c2 */
-    tmp10 = ((FAST_FLOAT) 1.082392200) * z12 - z5; /* 2*(c2-c6) */
-    tmp12 = ((FAST_FLOAT) -2.613125930) * z10 + z5; /* -2*(c2+c6) */
-
-    tmp6 = tmp12 - tmp7;	/* phase 2 */
-    tmp5 = tmp11 - tmp6;
-    tmp4 = tmp10 + tmp5;
-
-    wsptr[DCTSIZE*0] = tmp0 + tmp7;
-    wsptr[DCTSIZE*7] = tmp0 - tmp7;
-    wsptr[DCTSIZE*1] = tmp1 + tmp6;
-    wsptr[DCTSIZE*6] = tmp1 - tmp6;
-    wsptr[DCTSIZE*2] = tmp2 + tmp5;
-    wsptr[DCTSIZE*5] = tmp2 - tmp5;
-    wsptr[DCTSIZE*4] = tmp3 + tmp4;
-    wsptr[DCTSIZE*3] = tmp3 - tmp4;
-
-    inptr++;			/* advance pointers to next column */
-    quantptr++;
-    wsptr++;
-  }
-  
-  /* Pass 2: process rows from work array, store into output array. */
-  /* Note that we must descale the results by a factor of 8 == 2**3. */
-
-  wsptr = workspace;
-  for (ctr = 0; ctr < DCTSIZE; ctr++) {
-    outptr = output_buf[ctr] + output_col;
-    /* Rows of zeroes can be exploited in the same way as we did with columns.
-     * However, the column calculation has created many nonzero AC terms, so
-     * the simplification applies less often (typically 5% to 10% of the time).
-     * And testing floats for zero is relatively expensive, so we don't bother.
-     */
-    
-    /* Even part */
-
-    tmp10 = wsptr[0] + wsptr[4];
-    tmp11 = wsptr[0] - wsptr[4];
-
-    tmp13 = wsptr[2] + wsptr[6];
-    tmp12 = (wsptr[2] - wsptr[6]) * ((FAST_FLOAT) 1.414213562) - tmp13;
-
-    tmp0 = tmp10 + tmp13;
-    tmp3 = tmp10 - tmp13;
-    tmp1 = tmp11 + tmp12;
-    tmp2 = tmp11 - tmp12;
-
-    /* Odd part */
-
-    z13 = wsptr[5] + wsptr[3];
-    z10 = wsptr[5] - wsptr[3];
-    z11 = wsptr[1] + wsptr[7];
-    z12 = wsptr[1] - wsptr[7];
-
-    tmp7 = z11 + z13;
-    tmp11 = (z11 - z13) * ((FAST_FLOAT) 1.414213562);
-
-    z5 = (z10 + z12) * ((FAST_FLOAT) 1.847759065); /* 2*c2 */
-    tmp10 = ((FAST_FLOAT) 1.082392200) * z12 - z5; /* 2*(c2-c6) */
-    tmp12 = ((FAST_FLOAT) -2.613125930) * z10 + z5; /* -2*(c2+c6) */
-
-    tmp6 = tmp12 - tmp7;
-    tmp5 = tmp11 - tmp6;
-    tmp4 = tmp10 + tmp5;
-
-    /* Final output stage: scale down by a factor of 8 and range-limit */
-
-    outptr[0] = range_limit[(int) DESCALE((INT32) (tmp0 + tmp7), 3)
-			    & RANGE_MASK];
-    outptr[7] = range_limit[(int) DESCALE((INT32) (tmp0 - tmp7), 3)
-			    & RANGE_MASK];
-    outptr[1] = range_limit[(int) DESCALE((INT32) (tmp1 + tmp6), 3)
-			    & RANGE_MASK];
-    outptr[6] = range_limit[(int) DESCALE((INT32) (tmp1 - tmp6), 3)
-			    & RANGE_MASK];
-    outptr[2] = range_limit[(int) DESCALE((INT32) (tmp2 + tmp5), 3)
-			    & RANGE_MASK];
-    outptr[5] = range_limit[(int) DESCALE((INT32) (tmp2 - tmp5), 3)
-			    & RANGE_MASK];
-    outptr[4] = range_limit[(int) DESCALE((INT32) (tmp3 + tmp4), 3)
-			    & RANGE_MASK];
-    outptr[3] = range_limit[(int) DESCALE((INT32) (tmp3 - tmp4), 3)
-			    & RANGE_MASK];
-    
-    wsptr += DCTSIZE;		/* advance pointer to next row */
-  }
-}
-
-#endif /* DCT_FLOAT_SUPPORTED */

cde/lib/DtHelp/jpeg/jidctfst.c

@@ -1,390 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jidctfst.c /main/2 1996/05/09 03:51:13 drk $ */
-/*
- * jidctfst.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a fast, not so accurate integer implementation of the
- * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
- * must also perform dequantization of the input coefficients.
- *
- * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
- * on each row (or vice versa, but it's more convenient to emit a row at
- * a time).  Direct algorithms are also available, but they are much more
- * complex and seem not to be any faster when reduced to code.
- *
- * This implementation is based on Arai, Agui, and Nakajima's algorithm for
- * scaled DCT.  Their original paper (Trans. IEICE E-71(11):1095) is in
- * Japanese, but the algorithm is described in the Pennebaker & Mitchell
- * JPEG textbook (see REFERENCES section in file README).  The following code
- * is based directly on figure 4-8 in P&M.
- * While an 8-point DCT cannot be done in less than 11 multiplies, it is
- * possible to arrange the computation so that many of the multiplies are
- * simple scalings of the final outputs.  These multiplies can then be
- * folded into the multiplications or divisions by the JPEG quantization
- * table entries.  The AA&N method leaves only 5 multiplies and 29 adds
- * to be done in the DCT itself.
- * The primary disadvantage of this method is that with fixed-point math,
- * accuracy is lost due to imprecise representation of the scaled
- * quantization values.  The smaller the quantization table entry, the less
- * precise the scaled value, so this implementation does worse with high-
- * quality-setting files than with low-quality ones.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h"		/* Private declarations for DCT subsystem */
-
-#ifdef DCT_IFAST_SUPPORTED
-
-
-/*
- * This module is specialized to the case DCTSIZE = 8.
- */
-
-#if DCTSIZE != 8
-  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
-#endif
-
-
-/* Scaling decisions are generally the same as in the LL&M algorithm;
- * see jidctint.c for more details.  However, we choose to descale
- * (right shift) multiplication products as soon as they are formed,
- * rather than carrying additional fractional bits into subsequent additions.
- * This compromises accuracy slightly, but it lets us save a few shifts.
- * More importantly, 16-bit arithmetic is then adequate (for 8-bit samples)
- * everywhere except in the multiplications proper; this saves a good deal
- * of work on 16-bit-int machines.
- *
- * The dequantized coefficients are not integers because the AA&N scaling
- * factors have been incorporated.  We represent them scaled up by PASS1_BITS,
- * so that the first and second IDCT rounds have the same input scaling.
- * For 8-bit JSAMPLEs, we choose IFAST_SCALE_BITS = PASS1_BITS so as to
- * avoid a descaling shift; this compromises accuracy rather drastically
- * for small quantization table entries, but it saves a lot of shifts.
- * For 12-bit JSAMPLEs, there's no hope of using 16x16 multiplies anyway,
- * so we use a much larger scaling factor to preserve accuracy.
- *
- * A final compromise is to represent the multiplicative constants to only
- * 8 fractional bits, rather than 13.  This saves some shifting work on some
- * machines, and may also reduce the cost of multiplication (since there
- * are fewer one-bits in the constants).
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define CONST_BITS  8
-#define PASS1_BITS  2
-#else
-#define CONST_BITS  8
-#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
-#endif
-
-/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
- * causing a lot of useless floating-point operations at run time.
- * To get around this we use the following pre-calculated constants.
- * If you change CONST_BITS you may want to add appropriate values.
- * (With a reasonable C compiler, you can just rely on the FIX() macro...)
- */
-
-#if CONST_BITS == 8
-#define FIX_1_082392200  ((INT32)  277)		/* FIX(1.082392200) */
-#define FIX_1_414213562  ((INT32)  362)		/* FIX(1.414213562) */
-#define FIX_1_847759065  ((INT32)  473)		/* FIX(1.847759065) */
-#define FIX_2_613125930  ((INT32)  669)		/* FIX(2.613125930) */
-#else
-#define FIX_1_082392200  FIX(1.082392200)
-#define FIX_1_414213562  FIX(1.414213562)
-#define FIX_1_847759065  FIX(1.847759065)
-#define FIX_2_613125930  FIX(2.613125930)
-#endif
-
-
-/* We can gain a little more speed, with a further compromise in accuracy,
- * by omitting the addition in a descaling shift.  This yields an incorrectly
- * rounded result half the time...
- */
-
-#ifndef USE_ACCURATE_ROUNDING
-#undef DESCALE
-#define DESCALE(x,n)  RIGHT_SHIFT(x, n)
-#endif
-
-
-/* Multiply a DCTELEM variable by an INT32 constant, and immediately
- * descale to yield a DCTELEM result.
- */
-
-#define MULTIPLY(var,const)  ((DCTELEM) DESCALE((var) * (const), CONST_BITS))
-
-
-/* Dequantize a coefficient by multiplying it by the multiplier-table
- * entry; produce a DCTELEM result.  For 8-bit data a 16x16->16
- * multiplication will do.  For 12-bit data, the multiplier table is
- * declared INT32, so a 32-bit multiply will be used.
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define DEQUANTIZE(coef,quantval)  (((IFAST_MULT_TYPE) (coef)) * (quantval))
-#else
-#define DEQUANTIZE(coef,quantval)  \
-	DESCALE((coef)*(quantval), IFAST_SCALE_BITS-PASS1_BITS)
-#endif
-
-
-/* Like DESCALE, but applies to a DCTELEM and produces an int.
- * We assume that int right shift is unsigned if INT32 right shift is.
- */
-
-#ifdef RIGHT_SHIFT_IS_UNSIGNED
-#define ISHIFT_TEMPS	DCTELEM ishift_temp;
-#if BITS_IN_JSAMPLE == 8
-#define DCTELEMBITS  16		/* DCTELEM may be 16 or 32 bits */
-#else
-#define DCTELEMBITS  32		/* DCTELEM must be 32 bits */
-#endif
-#define IRIGHT_SHIFT(x,shft)  \
-    ((ishift_temp = (x)) < 0 ? \
-     (ishift_temp >> (shft)) | ((~((DCTELEM) 0)) << (DCTELEMBITS-(shft))) : \
-     (ishift_temp >> (shft)))
-#else
-#define ISHIFT_TEMPS
-#define IRIGHT_SHIFT(x,shft)	((x) >> (shft))
-#endif
-
-#ifdef USE_ACCURATE_ROUNDING
-#define IDESCALE(x,n)  ((int) IRIGHT_SHIFT((x) + (1 << ((n)-1)), n))
-#else
-#define IDESCALE(x,n)  ((int) IRIGHT_SHIFT(x, n))
-#endif
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients.
- */
-
-GLOBAL(void)
-jpeg_idct_ifast (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		 JCOEFPTR coef_block,
-		 JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  DCTELEM tmp0, tmp1, tmp2, tmp3, tmp4, tmp5, tmp6, tmp7;
-  DCTELEM tmp10, tmp11, tmp12, tmp13;
-  DCTELEM z5, z10, z11, z12, z13;
-  JCOEFPTR inptr;
-  IFAST_MULT_TYPE * quantptr;
-  int * wsptr;
-  JSAMPROW outptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  int ctr;
-  int workspace[DCTSIZE2];	/* buffers data between passes */
-  SHIFT_TEMPS			/* for DESCALE */
-  ISHIFT_TEMPS			/* for IDESCALE */
-
-  /* Pass 1: process columns from input, store into work array. */
-
-  inptr = coef_block;
-  quantptr = (IFAST_MULT_TYPE *) compptr->dct_table;
-  wsptr = workspace;
-  for (ctr = DCTSIZE; ctr > 0; ctr--) {
-    /* Due to quantization, we will usually find that many of the input
-     * coefficients are zero, especially the AC terms.  We can exploit this
-     * by short-circuiting the IDCT calculation for any column in which all
-     * the AC terms are zero.  In that case each output is equal to the
-     * DC coefficient (with scale factor as needed).
-     * With typical images and quantization tables, half or more of the
-     * column DCT calculations can be simplified this way.
-     */
-    
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
-      /* AC terms all zero */
-      int dcval = (int) DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-
-      wsptr[DCTSIZE*0] = dcval;
-      wsptr[DCTSIZE*1] = dcval;
-      wsptr[DCTSIZE*2] = dcval;
-      wsptr[DCTSIZE*3] = dcval;
-      wsptr[DCTSIZE*4] = dcval;
-      wsptr[DCTSIZE*5] = dcval;
-      wsptr[DCTSIZE*6] = dcval;
-      wsptr[DCTSIZE*7] = dcval;
-      
-      inptr++;			/* advance pointers to next column */
-      quantptr++;
-      wsptr++;
-      continue;
-    }
-    
-    /* Even part */
-
-    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-    tmp1 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
-    tmp2 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
-    tmp3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-
-    tmp10 = tmp0 + tmp2;	/* phase 3 */
-    tmp11 = tmp0 - tmp2;
-
-    tmp13 = tmp1 + tmp3;	/* phases 5-3 */
-    tmp12 = MULTIPLY(tmp1 - tmp3, FIX_1_414213562) - tmp13; /* 2*c4 */
-
-    tmp0 = tmp10 + tmp13;	/* phase 2 */
-    tmp3 = tmp10 - tmp13;
-    tmp1 = tmp11 + tmp12;
-    tmp2 = tmp11 - tmp12;
-    
-    /* Odd part */
-
-    tmp4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-    tmp5 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-    tmp6 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-    tmp7 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-
-    z13 = tmp6 + tmp5;		/* phase 6 */
-    z10 = tmp6 - tmp5;
-    z11 = tmp4 + tmp7;
-    z12 = tmp4 - tmp7;
-
-    tmp7 = z11 + z13;		/* phase 5 */
-    tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
-    z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
-    tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
-    tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
-    tmp6 = tmp12 - tmp7;	/* phase 2 */
-    tmp5 = tmp11 - tmp6;
-    tmp4 = tmp10 + tmp5;
-
-    wsptr[DCTSIZE*0] = (int) (tmp0 + tmp7);
-    wsptr[DCTSIZE*7] = (int) (tmp0 - tmp7);
-    wsptr[DCTSIZE*1] = (int) (tmp1 + tmp6);
-    wsptr[DCTSIZE*6] = (int) (tmp1 - tmp6);
-    wsptr[DCTSIZE*2] = (int) (tmp2 + tmp5);
-    wsptr[DCTSIZE*5] = (int) (tmp2 - tmp5);
-    wsptr[DCTSIZE*4] = (int) (tmp3 + tmp4);
-    wsptr[DCTSIZE*3] = (int) (tmp3 - tmp4);
-
-    inptr++;			/* advance pointers to next column */
-    quantptr++;
-    wsptr++;
-  }
-  
-  /* Pass 2: process rows from work array, store into output array. */
-  /* Note that we must descale the results by a factor of 8 == 2**3, */
-  /* and also undo the PASS1_BITS scaling. */
-
-  wsptr = workspace;
-  for (ctr = 0; ctr < DCTSIZE; ctr++) {
-    outptr = output_buf[ctr] + output_col;
-    /* Rows of zeroes can be exploited in the same way as we did with columns.
-     * However, the column calculation has created many nonzero AC terms, so
-     * the simplification applies less often (typically 5% to 10% of the time).
-     * On machines with very fast multiplication, it's possible that the
-     * test takes more time than it's worth.  In that case this section
-     * may be commented out.
-     */
-    
-#ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
-      /* AC terms all zero */
-      JSAMPLE dcval = range_limit[IDESCALE(wsptr[0], PASS1_BITS+3)
-				  & RANGE_MASK];
-      
-      outptr[0] = dcval;
-      outptr[1] = dcval;
-      outptr[2] = dcval;
-      outptr[3] = dcval;
-      outptr[4] = dcval;
-      outptr[5] = dcval;
-      outptr[6] = dcval;
-      outptr[7] = dcval;
-
-      wsptr += DCTSIZE;		/* advance pointer to next row */
-      continue;
-    }
-#endif
-    
-    /* Even part */
-
-    tmp10 = ((DCTELEM) wsptr[0] + (DCTELEM) wsptr[4]);
-    tmp11 = ((DCTELEM) wsptr[0] - (DCTELEM) wsptr[4]);
-
-    tmp13 = ((DCTELEM) wsptr[2] + (DCTELEM) wsptr[6]);
-    tmp12 = MULTIPLY((DCTELEM) wsptr[2] - (DCTELEM) wsptr[6], FIX_1_414213562)
-	    - tmp13;
-
-    tmp0 = tmp10 + tmp13;
-    tmp3 = tmp10 - tmp13;
-    tmp1 = tmp11 + tmp12;
-    tmp2 = tmp11 - tmp12;
-
-    /* Odd part */
-
-    z13 = (DCTELEM) wsptr[5] + (DCTELEM) wsptr[3];
-    z10 = (DCTELEM) wsptr[5] - (DCTELEM) wsptr[3];
-    z11 = (DCTELEM) wsptr[1] + (DCTELEM) wsptr[7];
-    z12 = (DCTELEM) wsptr[1] - (DCTELEM) wsptr[7];
-
-    tmp7 = z11 + z13;		/* phase 5 */
-    tmp11 = MULTIPLY(z11 - z13, FIX_1_414213562); /* 2*c4 */
-
-    z5 = MULTIPLY(z10 + z12, FIX_1_847759065); /* 2*c2 */
-    tmp10 = MULTIPLY(z12, FIX_1_082392200) - z5; /* 2*(c2-c6) */
-    tmp12 = MULTIPLY(z10, - FIX_2_613125930) + z5; /* -2*(c2+c6) */
-
-    tmp6 = tmp12 - tmp7;	/* phase 2 */
-    tmp5 = tmp11 - tmp6;
-    tmp4 = tmp10 + tmp5;
-
-    /* Final output stage: scale down by a factor of 8 and range-limit */
-
-    outptr[0] = range_limit[IDESCALE(tmp0 + tmp7, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[7] = range_limit[IDESCALE(tmp0 - tmp7, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[1] = range_limit[IDESCALE(tmp1 + tmp6, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[6] = range_limit[IDESCALE(tmp1 - tmp6, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[2] = range_limit[IDESCALE(tmp2 + tmp5, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[5] = range_limit[IDESCALE(tmp2 - tmp5, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[4] = range_limit[IDESCALE(tmp3 + tmp4, PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[3] = range_limit[IDESCALE(tmp3 - tmp4, PASS1_BITS+3)
-			    & RANGE_MASK];
-
-    wsptr += DCTSIZE;		/* advance pointer to next row */
-  }
-}
-
-#endif /* DCT_IFAST_SUPPORTED */

cde/lib/DtHelp/jpeg/jidctint.c

@@ -1,411 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jidctint.c /main/2 1996/05/09 03:51:27 drk $ */
-/*
- * jidctint.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains a slow-but-accurate integer implementation of the
- * inverse DCT (Discrete Cosine Transform).  In the IJG code, this routine
- * must also perform dequantization of the input coefficients.
- *
- * A 2-D IDCT can be done by 1-D IDCT on each column followed by 1-D IDCT
- * on each row (or vice versa, but it's more convenient to emit a row at
- * a time).  Direct algorithms are also available, but they are much more
- * complex and seem not to be any faster when reduced to code.
- *
- * This implementation is based on an algorithm described in
- *   C. Loeffler, A. Ligtenberg and G. Moschytz, "Practical Fast 1-D DCT
- *   Algorithms with 11 Multiplications", Proc. Int'l. Conf. on Acoustics,
- *   Speech, and Signal Processing 1989 (ICASSP '89), pp. 988-991.
- * The primary algorithm described there uses 11 multiplies and 29 adds.
- * We use their alternate method with 12 multiplies and 32 adds.
- * The advantage of this method is that no data path contains more than one
- * multiplication; this allows a very simple and accurate implementation in
- * scaled fixed-point arithmetic, with a minimal number of shifts.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h"		/* Private declarations for DCT subsystem */
-
-#ifdef DCT_ISLOW_SUPPORTED
-
-
-/*
- * This module is specialized to the case DCTSIZE = 8.
- */
-
-#if DCTSIZE != 8
-  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
-#endif
-
-
-/*
- * The poop on this scaling stuff is as follows:
- *
- * Each 1-D IDCT step produces outputs which are a factor of sqrt(N)
- * larger than the true IDCT outputs.  The final outputs are therefore
- * a factor of N larger than desired; since N=8 this can be cured by
- * a simple right shift at the end of the algorithm.  The advantage of
- * this arrangement is that we save two multiplications per 1-D IDCT,
- * because the y0 and y4 inputs need not be divided by sqrt(N).
- *
- * We have to do addition and subtraction of the integer inputs, which
- * is no problem, and multiplication by fractional constants, which is
- * a problem to do in integer arithmetic.  We multiply all the constants
- * by CONST_SCALE and convert them to integer constants (thus retaining
- * CONST_BITS bits of precision in the constants).  After doing a
- * multiplication we have to divide the product by CONST_SCALE, with proper
- * rounding, to produce the correct output.  This division can be done
- * cheaply as a right shift of CONST_BITS bits.  We postpone shifting
- * as long as possible so that partial sums can be added together with
- * full fractional precision.
- *
- * The outputs of the first pass are scaled up by PASS1_BITS bits so that
- * they are represented to better-than-integral precision.  These outputs
- * require BITS_IN_JSAMPLE + PASS1_BITS + 3 bits; this fits in a 16-bit word
- * with the recommended scaling.  (To scale up 12-bit sample data further, an
- * intermediate INT32 array would be needed.)
- *
- * To avoid overflow of the 32-bit intermediate results in pass 2, we must
- * have BITS_IN_JSAMPLE + CONST_BITS + PASS1_BITS <= 26.  Error analysis
- * shows that the values given below are the most effective.
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define CONST_BITS  13
-#define PASS1_BITS  2
-#else
-#define CONST_BITS  13
-#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
-#endif
-
-/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
- * causing a lot of useless floating-point operations at run time.
- * To get around this we use the following pre-calculated constants.
- * If you change CONST_BITS you may want to add appropriate values.
- * (With a reasonable C compiler, you can just rely on the FIX() macro...)
- */
-
-#if CONST_BITS == 13
-#define FIX_0_298631336  ((INT32)  2446)	/* FIX(0.298631336) */
-#define FIX_0_390180644  ((INT32)  3196)	/* FIX(0.390180644) */
-#define FIX_0_541196100  ((INT32)  4433)	/* FIX(0.541196100) */
-#define FIX_0_765366865  ((INT32)  6270)	/* FIX(0.765366865) */
-#define FIX_0_899976223  ((INT32)  7373)	/* FIX(0.899976223) */
-#define FIX_1_175875602  ((INT32)  9633)	/* FIX(1.175875602) */
-#define FIX_1_501321110  ((INT32)  12299)	/* FIX(1.501321110) */
-#define FIX_1_847759065  ((INT32)  15137)	/* FIX(1.847759065) */
-#define FIX_1_961570560  ((INT32)  16069)	/* FIX(1.961570560) */
-#define FIX_2_053119869  ((INT32)  16819)	/* FIX(2.053119869) */
-#define FIX_2_562915447  ((INT32)  20995)	/* FIX(2.562915447) */
-#define FIX_3_072711026  ((INT32)  25172)	/* FIX(3.072711026) */
-#else
-#define FIX_0_298631336  FIX(0.298631336)
-#define FIX_0_390180644  FIX(0.390180644)
-#define FIX_0_541196100  FIX(0.541196100)
-#define FIX_0_765366865  FIX(0.765366865)
-#define FIX_0_899976223  FIX(0.899976223)
-#define FIX_1_175875602  FIX(1.175875602)
-#define FIX_1_501321110  FIX(1.501321110)
-#define FIX_1_847759065  FIX(1.847759065)
-#define FIX_1_961570560  FIX(1.961570560)
-#define FIX_2_053119869  FIX(2.053119869)
-#define FIX_2_562915447  FIX(2.562915447)
-#define FIX_3_072711026  FIX(3.072711026)
-#endif
-
-
-/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
- * For 8-bit samples with the recommended scaling, all the variable
- * and constant values involved are no more than 16 bits wide, so a
- * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
- * For 12-bit samples, a full 32-bit multiplication will be needed.
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
-#else
-#define MULTIPLY(var,const)  ((var) * (const))
-#endif
-
-
-/* Dequantize a coefficient by multiplying it by the multiplier-table
- * entry; produce an int result.  In this module, both inputs and result
- * are 16 bits or less, so either int or short multiply will work.
- */
-
-#define DEQUANTIZE(coef,quantval)  (((ISLOW_MULT_TYPE) (coef)) * (quantval))
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients.
- */
-
-GLOBAL(void)
-jpeg_idct_islow (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		 JCOEFPTR coef_block,
-		 JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  INT32 tmp0, tmp1, tmp2, tmp3;
-  INT32 tmp10, tmp11, tmp12, tmp13;
-  INT32 z1, z2, z3, z4, z5;
-  JCOEFPTR inptr;
-  ISLOW_MULT_TYPE * quantptr;
-  int * wsptr;
-  JSAMPROW outptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  int ctr;
-  int workspace[DCTSIZE2];	/* buffers data between passes */
-  SHIFT_TEMPS
-
-  /* Pass 1: process columns from input, store into work array. */
-  /* Note results are scaled up by sqrt(8) compared to a true IDCT; */
-  /* furthermore, we scale the results by 2**PASS1_BITS. */
-
-  inptr = coef_block;
-  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
-  wsptr = workspace;
-  for (ctr = DCTSIZE; ctr > 0; ctr--) {
-    /* Due to quantization, we will usually find that many of the input
-     * coefficients are zero, especially the AC terms.  We can exploit this
-     * by short-circuiting the IDCT calculation for any column in which all
-     * the AC terms are zero.  In that case each output is equal to the
-     * DC coefficient (with scale factor as needed).
-     * With typical images and quantization tables, half or more of the
-     * column DCT calculations can be simplified this way.
-     */
-    
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*4] | inptr[DCTSIZE*5] | inptr[DCTSIZE*6] |
-	 inptr[DCTSIZE*7]) == 0) {
-      /* AC terms all zero */
-      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
-      
-      wsptr[DCTSIZE*0] = dcval;
-      wsptr[DCTSIZE*1] = dcval;
-      wsptr[DCTSIZE*2] = dcval;
-      wsptr[DCTSIZE*3] = dcval;
-      wsptr[DCTSIZE*4] = dcval;
-      wsptr[DCTSIZE*5] = dcval;
-      wsptr[DCTSIZE*6] = dcval;
-      wsptr[DCTSIZE*7] = dcval;
-      
-      inptr++;			/* advance pointers to next column */
-      quantptr++;
-      wsptr++;
-      continue;
-    }
-    
-    /* Even part: reverse the even part of the forward DCT. */
-    /* The rotator is sqrt(2)*c(-6). */
-    
-    z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
-    z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-    
-    z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
-    tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
-    tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
-    
-    z2 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-    z3 = DEQUANTIZE(inptr[DCTSIZE*4], quantptr[DCTSIZE*4]);
-
-    tmp0 = (z2 + z3) << CONST_BITS;
-    tmp1 = (z2 - z3) << CONST_BITS;
-    
-    tmp10 = tmp0 + tmp3;
-    tmp13 = tmp0 - tmp3;
-    tmp11 = tmp1 + tmp2;
-    tmp12 = tmp1 - tmp2;
-    
-    /* Odd part per figure 8; the matrix is unitary and hence its
-     * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
-     */
-    
-    tmp0 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-    tmp1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-    tmp2 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-    tmp3 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-    
-    z1 = tmp0 + tmp3;
-    z2 = tmp1 + tmp2;
-    z3 = tmp0 + tmp2;
-    z4 = tmp1 + tmp3;
-    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
-    
-    tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
-    tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
-    tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
-    tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
-    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
-    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
-    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
-    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
-    
-    z3 += z5;
-    z4 += z5;
-    
-    tmp0 += z1 + z3;
-    tmp1 += z2 + z4;
-    tmp2 += z2 + z3;
-    tmp3 += z1 + z4;
-    
-    /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
-    
-    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp3, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*7] = (int) DESCALE(tmp10 - tmp3, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*1] = (int) DESCALE(tmp11 + tmp2, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*6] = (int) DESCALE(tmp11 - tmp2, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 + tmp1, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*5] = (int) DESCALE(tmp12 - tmp1, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*3] = (int) DESCALE(tmp13 + tmp0, CONST_BITS-PASS1_BITS);
-    wsptr[DCTSIZE*4] = (int) DESCALE(tmp13 - tmp0, CONST_BITS-PASS1_BITS);
-    
-    inptr++;			/* advance pointers to next column */
-    quantptr++;
-    wsptr++;
-  }
-  
-  /* Pass 2: process rows from work array, store into output array. */
-  /* Note that we must descale the results by a factor of 8 == 2**3, */
-  /* and also undo the PASS1_BITS scaling. */
-
-  wsptr = workspace;
-  for (ctr = 0; ctr < DCTSIZE; ctr++) {
-    outptr = output_buf[ctr] + output_col;
-    /* Rows of zeroes can be exploited in the same way as we did with columns.
-     * However, the column calculation has created many nonzero AC terms, so
-     * the simplification applies less often (typically 5% to 10% of the time).
-     * On machines with very fast multiplication, it's possible that the
-     * test takes more time than it's worth.  In that case this section
-     * may be commented out.
-     */
-    
-#ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[4] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
-      /* AC terms all zero */
-      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
-				  & RANGE_MASK];
-      
-      outptr[0] = dcval;
-      outptr[1] = dcval;
-      outptr[2] = dcval;
-      outptr[3] = dcval;
-      outptr[4] = dcval;
-      outptr[5] = dcval;
-      outptr[6] = dcval;
-      outptr[7] = dcval;
-
-      wsptr += DCTSIZE;		/* advance pointer to next row */
-      continue;
-    }
-#endif
-    
-    /* Even part: reverse the even part of the forward DCT. */
-    /* The rotator is sqrt(2)*c(-6). */
-    
-    z2 = (INT32) wsptr[2];
-    z3 = (INT32) wsptr[6];
-    
-    z1 = MULTIPLY(z2 + z3, FIX_0_541196100);
-    tmp2 = z1 + MULTIPLY(z3, - FIX_1_847759065);
-    tmp3 = z1 + MULTIPLY(z2, FIX_0_765366865);
-    
-    tmp0 = ((INT32) wsptr[0] + (INT32) wsptr[4]) << CONST_BITS;
-    tmp1 = ((INT32) wsptr[0] - (INT32) wsptr[4]) << CONST_BITS;
-    
-    tmp10 = tmp0 + tmp3;
-    tmp13 = tmp0 - tmp3;
-    tmp11 = tmp1 + tmp2;
-    tmp12 = tmp1 - tmp2;
-    
-    /* Odd part per figure 8; the matrix is unitary and hence its
-     * transpose is its inverse.  i0..i3 are y7,y5,y3,y1 respectively.
-     */
-    
-    tmp0 = (INT32) wsptr[7];
-    tmp1 = (INT32) wsptr[5];
-    tmp2 = (INT32) wsptr[3];
-    tmp3 = (INT32) wsptr[1];
-    
-    z1 = tmp0 + tmp3;
-    z2 = tmp1 + tmp2;
-    z3 = tmp0 + tmp2;
-    z4 = tmp1 + tmp3;
-    z5 = MULTIPLY(z3 + z4, FIX_1_175875602); /* sqrt(2) * c3 */
-    
-    tmp0 = MULTIPLY(tmp0, FIX_0_298631336); /* sqrt(2) * (-c1+c3+c5-c7) */
-    tmp1 = MULTIPLY(tmp1, FIX_2_053119869); /* sqrt(2) * ( c1+c3-c5+c7) */
-    tmp2 = MULTIPLY(tmp2, FIX_3_072711026); /* sqrt(2) * ( c1+c3+c5-c7) */
-    tmp3 = MULTIPLY(tmp3, FIX_1_501321110); /* sqrt(2) * ( c1+c3-c5-c7) */
-    z1 = MULTIPLY(z1, - FIX_0_899976223); /* sqrt(2) * (c7-c3) */
-    z2 = MULTIPLY(z2, - FIX_2_562915447); /* sqrt(2) * (-c1-c3) */
-    z3 = MULTIPLY(z3, - FIX_1_961570560); /* sqrt(2) * (-c3-c5) */
-    z4 = MULTIPLY(z4, - FIX_0_390180644); /* sqrt(2) * (c5-c3) */
-    
-    z3 += z5;
-    z4 += z5;
-    
-    tmp0 += z1 + z3;
-    tmp1 += z2 + z4;
-    tmp2 += z2 + z3;
-    tmp3 += z1 + z4;
-    
-    /* Final output stage: inputs are tmp10..tmp13, tmp0..tmp3 */
-    
-    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp3,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[7] = range_limit[(int) DESCALE(tmp10 - tmp3,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[1] = range_limit[(int) DESCALE(tmp11 + tmp2,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[6] = range_limit[(int) DESCALE(tmp11 - tmp2,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[2] = range_limit[(int) DESCALE(tmp12 + tmp1,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[5] = range_limit[(int) DESCALE(tmp12 - tmp1,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[3] = range_limit[(int) DESCALE(tmp13 + tmp0,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    outptr[4] = range_limit[(int) DESCALE(tmp13 - tmp0,
-					  CONST_BITS+PASS1_BITS+3)
-			    & RANGE_MASK];
-    
-    wsptr += DCTSIZE;		/* advance pointer to next row */
-  }
-}
-
-#endif /* DCT_ISLOW_SUPPORTED */

cde/lib/DtHelp/jpeg/jidctred.c

@@ -1,420 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jidctred.c /main/2 1996/05/09 03:51:41 drk $ */
-/*
- * jidctred.c
- *
- * Copyright (C) 1994-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains inverse-DCT routines that produce reduced-size output:
- * either 4x4, 2x2, or 1x1 pixels from an 8x8 DCT block.
- *
- * The implementation is based on the Loeffler, Ligtenberg and Moschytz (LL&M)
- * algorithm used in jidctint.c.  We simply replace each 8-to-8 1-D IDCT step
- * with an 8-to-4 step that produces the four averages of two adjacent outputs
- * (or an 8-to-2 step producing two averages of four outputs, for 2x2 output).
- * These steps were derived by computing the corresponding values at the end
- * of the normal LL&M code, then simplifying as much as possible.
- *
- * 1x1 is trivial: just take the DC coefficient divided by 8.
- *
- * See jidctint.c for additional comments.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jdct.h"		/* Private declarations for DCT subsystem */
-
-#ifdef IDCT_SCALING_SUPPORTED
-
-
-/*
- * This module is specialized to the case DCTSIZE = 8.
- */
-
-#if DCTSIZE != 8
-  Sorry, this code only copes with 8x8 DCTs. /* deliberate syntax err */
-#endif
-
-
-/* Scaling is the same as in jidctint.c. */
-
-#if BITS_IN_JSAMPLE == 8
-#define CONST_BITS  13
-#define PASS1_BITS  2
-#else
-#define CONST_BITS  13
-#define PASS1_BITS  1		/* lose a little precision to avoid overflow */
-#endif
-
-/* Some C compilers fail to reduce "FIX(constant)" at compile time, thus
- * causing a lot of useless floating-point operations at run time.
- * To get around this we use the following pre-calculated constants.
- * If you change CONST_BITS you may want to add appropriate values.
- * (With a reasonable C compiler, you can just rely on the FIX() macro...)
- */
-
-#if CONST_BITS == 13
-#define FIX_0_211164243  ((INT32)  1730)	/* FIX(0.211164243) */
-#define FIX_0_509795579  ((INT32)  4176)	/* FIX(0.509795579) */
-#define FIX_0_601344887  ((INT32)  4926)	/* FIX(0.601344887) */
-#define FIX_0_720959822  ((INT32)  5906)	/* FIX(0.720959822) */
-#define FIX_0_765366865  ((INT32)  6270)	/* FIX(0.765366865) */
-#define FIX_0_850430095  ((INT32)  6967)	/* FIX(0.850430095) */
-#define FIX_0_899976223  ((INT32)  7373)	/* FIX(0.899976223) */
-#define FIX_1_061594337  ((INT32)  8697)	/* FIX(1.061594337) */
-#define FIX_1_272758580  ((INT32)  10426)	/* FIX(1.272758580) */
-#define FIX_1_451774981  ((INT32)  11893)	/* FIX(1.451774981) */
-#define FIX_1_847759065  ((INT32)  15137)	/* FIX(1.847759065) */
-#define FIX_2_172734803  ((INT32)  17799)	/* FIX(2.172734803) */
-#define FIX_2_562915447  ((INT32)  20995)	/* FIX(2.562915447) */
-#define FIX_3_624509785  ((INT32)  29692)	/* FIX(3.624509785) */
-#else
-#define FIX_0_211164243  FIX(0.211164243)
-#define FIX_0_509795579  FIX(0.509795579)
-#define FIX_0_601344887  FIX(0.601344887)
-#define FIX_0_720959822  FIX(0.720959822)
-#define FIX_0_765366865  FIX(0.765366865)
-#define FIX_0_850430095  FIX(0.850430095)
-#define FIX_0_899976223  FIX(0.899976223)
-#define FIX_1_061594337  FIX(1.061594337)
-#define FIX_1_272758580  FIX(1.272758580)
-#define FIX_1_451774981  FIX(1.451774981)
-#define FIX_1_847759065  FIX(1.847759065)
-#define FIX_2_172734803  FIX(2.172734803)
-#define FIX_2_562915447  FIX(2.562915447)
-#define FIX_3_624509785  FIX(3.624509785)
-#endif
-
-
-/* Multiply an INT32 variable by an INT32 constant to yield an INT32 result.
- * For 8-bit samples with the recommended scaling, all the variable
- * and constant values involved are no more than 16 bits wide, so a
- * 16x16->32 bit multiply can be used instead of a full 32x32 multiply.
- * For 12-bit samples, a full 32-bit multiplication will be needed.
- */
-
-#if BITS_IN_JSAMPLE == 8
-#define MULTIPLY(var,const)  MULTIPLY16C16(var,const)
-#else
-#define MULTIPLY(var,const)  ((var) * (const))
-#endif
-
-
-/* Dequantize a coefficient by multiplying it by the multiplier-table
- * entry; produce an int result.  In this module, both inputs and result
- * are 16 bits or less, so either int or short multiply will work.
- */
-
-#define DEQUANTIZE(coef,quantval)  (((ISLOW_MULT_TYPE) (coef)) * (quantval))
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients,
- * producing a reduced-size 4x4 output block.
- */
-
-GLOBAL(void)
-jpeg_idct_4x4 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JCOEFPTR coef_block,
-	       JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  INT32 tmp0, tmp2, tmp10, tmp12;
-  INT32 z1, z2, z3, z4;
-  JCOEFPTR inptr;
-  ISLOW_MULT_TYPE * quantptr;
-  int * wsptr;
-  JSAMPROW outptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  int ctr;
-  int workspace[DCTSIZE*4];	/* buffers data between passes */
-  SHIFT_TEMPS
-
-  /* Pass 1: process columns from input, store into work array. */
-
-  inptr = coef_block;
-  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
-  wsptr = workspace;
-  for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
-    /* Don't bother to process column 4, because second pass won't use it */
-    if (ctr == DCTSIZE-4)
-      continue;
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*2] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*5] | inptr[DCTSIZE*6] | inptr[DCTSIZE*7]) == 0) {
-      /* AC terms all zero; we need not examine term 4 for 4x4 output */
-      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
-      
-      wsptr[DCTSIZE*0] = dcval;
-      wsptr[DCTSIZE*1] = dcval;
-      wsptr[DCTSIZE*2] = dcval;
-      wsptr[DCTSIZE*3] = dcval;
-      
-      continue;
-    }
-    
-    /* Even part */
-    
-    tmp0 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-    tmp0 <<= (CONST_BITS+1);
-    
-    z2 = DEQUANTIZE(inptr[DCTSIZE*2], quantptr[DCTSIZE*2]);
-    z3 = DEQUANTIZE(inptr[DCTSIZE*6], quantptr[DCTSIZE*6]);
-
-    tmp2 = MULTIPLY(z2, FIX_1_847759065) + MULTIPLY(z3, - FIX_0_765366865);
-    
-    tmp10 = tmp0 + tmp2;
-    tmp12 = tmp0 - tmp2;
-    
-    /* Odd part */
-    
-    z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-    z2 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-    z3 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-    z4 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-    
-    tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
-	 + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
-	 + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
-	 + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
-    
-    tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
-	 + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
-	 + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
-	 + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
-
-    /* Final output stage */
-    
-    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp2, CONST_BITS-PASS1_BITS+1);
-    wsptr[DCTSIZE*3] = (int) DESCALE(tmp10 - tmp2, CONST_BITS-PASS1_BITS+1);
-    wsptr[DCTSIZE*1] = (int) DESCALE(tmp12 + tmp0, CONST_BITS-PASS1_BITS+1);
-    wsptr[DCTSIZE*2] = (int) DESCALE(tmp12 - tmp0, CONST_BITS-PASS1_BITS+1);
-  }
-  
-  /* Pass 2: process 4 rows from work array, store into output array. */
-
-  wsptr = workspace;
-  for (ctr = 0; ctr < 4; ctr++) {
-    outptr = output_buf[ctr] + output_col;
-    /* It's not clear whether a zero row test is worthwhile here ... */
-
-#ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[2] | wsptr[3] | wsptr[5] | wsptr[6] |
-	 wsptr[7]) == 0) {
-      /* AC terms all zero */
-      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
-				  & RANGE_MASK];
-      
-      outptr[0] = dcval;
-      outptr[1] = dcval;
-      outptr[2] = dcval;
-      outptr[3] = dcval;
-      
-      wsptr += DCTSIZE;		/* advance pointer to next row */
-      continue;
-    }
-#endif
-    
-    /* Even part */
-    
-    tmp0 = ((INT32) wsptr[0]) << (CONST_BITS+1);
-    
-    tmp2 = MULTIPLY((INT32) wsptr[2], FIX_1_847759065)
-	 + MULTIPLY((INT32) wsptr[6], - FIX_0_765366865);
-    
-    tmp10 = tmp0 + tmp2;
-    tmp12 = tmp0 - tmp2;
-    
-    /* Odd part */
-    
-    z1 = (INT32) wsptr[7];
-    z2 = (INT32) wsptr[5];
-    z3 = (INT32) wsptr[3];
-    z4 = (INT32) wsptr[1];
-    
-    tmp0 = MULTIPLY(z1, - FIX_0_211164243) /* sqrt(2) * (c3-c1) */
-	 + MULTIPLY(z2, FIX_1_451774981) /* sqrt(2) * (c3+c7) */
-	 + MULTIPLY(z3, - FIX_2_172734803) /* sqrt(2) * (-c1-c5) */
-	 + MULTIPLY(z4, FIX_1_061594337); /* sqrt(2) * (c5+c7) */
-    
-    tmp2 = MULTIPLY(z1, - FIX_0_509795579) /* sqrt(2) * (c7-c5) */
-	 + MULTIPLY(z2, - FIX_0_601344887) /* sqrt(2) * (c5-c1) */
-	 + MULTIPLY(z3, FIX_0_899976223) /* sqrt(2) * (c3-c7) */
-	 + MULTIPLY(z4, FIX_2_562915447); /* sqrt(2) * (c1+c3) */
-
-    /* Final output stage */
-    
-    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp2,
-					  CONST_BITS+PASS1_BITS+3+1)
-			    & RANGE_MASK];
-    outptr[3] = range_limit[(int) DESCALE(tmp10 - tmp2,
-					  CONST_BITS+PASS1_BITS+3+1)
-			    & RANGE_MASK];
-    outptr[1] = range_limit[(int) DESCALE(tmp12 + tmp0,
-					  CONST_BITS+PASS1_BITS+3+1)
-			    & RANGE_MASK];
-    outptr[2] = range_limit[(int) DESCALE(tmp12 - tmp0,
-					  CONST_BITS+PASS1_BITS+3+1)
-			    & RANGE_MASK];
-    
-    wsptr += DCTSIZE;		/* advance pointer to next row */
-  }
-}
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients,
- * producing a reduced-size 2x2 output block.
- */
-
-GLOBAL(void)
-jpeg_idct_2x2 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JCOEFPTR coef_block,
-	       JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  INT32 tmp0, tmp10, z1;
-  JCOEFPTR inptr;
-  ISLOW_MULT_TYPE * quantptr;
-  int * wsptr;
-  JSAMPROW outptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  int ctr;
-  int workspace[DCTSIZE*2];	/* buffers data between passes */
-  SHIFT_TEMPS
-
-  /* Pass 1: process columns from input, store into work array. */
-
-  inptr = coef_block;
-  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
-  wsptr = workspace;
-  for (ctr = DCTSIZE; ctr > 0; inptr++, quantptr++, wsptr++, ctr--) {
-    /* Don't bother to process columns 2,4,6 */
-    if (ctr == DCTSIZE-2 || ctr == DCTSIZE-4 || ctr == DCTSIZE-6)
-      continue;
-    if ((inptr[DCTSIZE*1] | inptr[DCTSIZE*3] |
-	 inptr[DCTSIZE*5] | inptr[DCTSIZE*7]) == 0) {
-      /* AC terms all zero; we need not examine terms 2,4,6 for 2x2 output */
-      int dcval = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]) << PASS1_BITS;
-      
-      wsptr[DCTSIZE*0] = dcval;
-      wsptr[DCTSIZE*1] = dcval;
-      
-      continue;
-    }
-    
-    /* Even part */
-    
-    z1 = DEQUANTIZE(inptr[DCTSIZE*0], quantptr[DCTSIZE*0]);
-    tmp10 = z1 << (CONST_BITS+2);
-    
-    /* Odd part */
-
-    z1 = DEQUANTIZE(inptr[DCTSIZE*7], quantptr[DCTSIZE*7]);
-    tmp0 = MULTIPLY(z1, - FIX_0_720959822); /* sqrt(2) * (c7-c5+c3-c1) */
-    z1 = DEQUANTIZE(inptr[DCTSIZE*5], quantptr[DCTSIZE*5]);
-    tmp0 += MULTIPLY(z1, FIX_0_850430095); /* sqrt(2) * (-c1+c3+c5+c7) */
-    z1 = DEQUANTIZE(inptr[DCTSIZE*3], quantptr[DCTSIZE*3]);
-    tmp0 += MULTIPLY(z1, - FIX_1_272758580); /* sqrt(2) * (-c1+c3-c5-c7) */
-    z1 = DEQUANTIZE(inptr[DCTSIZE*1], quantptr[DCTSIZE*1]);
-    tmp0 += MULTIPLY(z1, FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
-
-    /* Final output stage */
-    
-    wsptr[DCTSIZE*0] = (int) DESCALE(tmp10 + tmp0, CONST_BITS-PASS1_BITS+2);
-    wsptr[DCTSIZE*1] = (int) DESCALE(tmp10 - tmp0, CONST_BITS-PASS1_BITS+2);
-  }
-  
-  /* Pass 2: process 2 rows from work array, store into output array. */
-
-  wsptr = workspace;
-  for (ctr = 0; ctr < 2; ctr++) {
-    outptr = output_buf[ctr] + output_col;
-    /* It's not clear whether a zero row test is worthwhile here ... */
-
-#ifndef NO_ZERO_ROW_TEST
-    if ((wsptr[1] | wsptr[3] | wsptr[5] | wsptr[7]) == 0) {
-      /* AC terms all zero */
-      JSAMPLE dcval = range_limit[(int) DESCALE((INT32) wsptr[0], PASS1_BITS+3)
-				  & RANGE_MASK];
-      
-      outptr[0] = dcval;
-      outptr[1] = dcval;
-      
-      wsptr += DCTSIZE;		/* advance pointer to next row */
-      continue;
-    }
-#endif
-    
-    /* Even part */
-    
-    tmp10 = ((INT32) wsptr[0]) << (CONST_BITS+2);
-    
-    /* Odd part */
-
-    tmp0 = MULTIPLY((INT32) wsptr[7], - FIX_0_720959822) /* sqrt(2) * (c7-c5+c3-c1) */
-	 + MULTIPLY((INT32) wsptr[5], FIX_0_850430095) /* sqrt(2) * (-c1+c3+c5+c7) */
-	 + MULTIPLY((INT32) wsptr[3], - FIX_1_272758580) /* sqrt(2) * (-c1+c3-c5-c7) */
-	 + MULTIPLY((INT32) wsptr[1], FIX_3_624509785); /* sqrt(2) * (c1+c3+c5+c7) */
-
-    /* Final output stage */
-    
-    outptr[0] = range_limit[(int) DESCALE(tmp10 + tmp0,
-					  CONST_BITS+PASS1_BITS+3+2)
-			    & RANGE_MASK];
-    outptr[1] = range_limit[(int) DESCALE(tmp10 - tmp0,
-					  CONST_BITS+PASS1_BITS+3+2)
-			    & RANGE_MASK];
-    
-    wsptr += DCTSIZE;		/* advance pointer to next row */
-  }
-}
-
-
-/*
- * Perform dequantization and inverse DCT on one block of coefficients,
- * producing a reduced-size 1x1 output block.
- */
-
-GLOBAL(void)
-jpeg_idct_1x1 (j_decompress_ptr cinfo, jpeg_component_info * compptr,
-	       JCOEFPTR coef_block,
-	       JSAMPARRAY output_buf, JDIMENSION output_col)
-{
-  int dcval;
-  ISLOW_MULT_TYPE * quantptr;
-  JSAMPLE *range_limit = IDCT_range_limit(cinfo);
-  SHIFT_TEMPS
-
-  /* We hardly need an inverse DCT routine for this: just take the
-   * average pixel value, which is one-eighth of the DC coefficient.
-   */
-  quantptr = (ISLOW_MULT_TYPE *) compptr->dct_table;
-  dcval = DEQUANTIZE(coef_block[0], quantptr[0]);
-  dcval = (int) DESCALE((INT32) dcval, 3);
-
-  output_buf[0][output_col] = range_limit[dcval & RANGE_MASK];
-}
-
-#endif /* IDCT_SCALING_SUPPORTED */

cde/lib/DtHelp/jpeg/jinclude.h

@@ -40,7 +40,7 @@
 
 /* Include auto-config file to find out which system include files we need. */
 
-#include "jconfig.h"		/* auto configuration options */
+#include <jconfig.h>		/* auto configuration options */
 #define JCONFIG_INCLUDED	/* so that jpeglib.h doesn't do it again */
 
 /*

cde/lib/DtHelp/jpeg/jmemmgr.c

@@ -1,1138 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jmemmgr.c /main/2 1996/05/09 03:52:10 drk $ */
-/*
- * jmemmgr.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains the JPEG system-independent memory management
- * routines.  This code is usable across a wide variety of machines; most
- * of the system dependencies have been isolated in a separate file.
- * The major functions provided here are:
- *   * pool-based allocation and freeing of memory;
- *   * policy decisions about how to divide available memory among the
- *     virtual arrays;
- *   * control logic for swapping virtual arrays between main memory and
- *     backing storage.
- * The separate system-dependent file provides the actual backing-storage
- * access code, and it contains the policy decision about how much total
- * main memory to use.
- * This file is system-dependent in the sense that some of its functions
- * are unnecessary in some systems.  For example, if there is enough virtual
- * memory so that backing storage will never be used, much of the virtual
- * array control logic could be removed.  (Of course, if you have that much
- * memory then you shouldn't care about a little bit of unused code...)
- */
-
-#define JPEG_INTERNALS
-#define AM_MEMORY_MANAGER	/* we define jvirt_Xarray_control structs */
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h"		/* import the system-dependent declarations */
-
-#ifndef NO_GETENV
-#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare getenv() */
-extern char * getenv JPP((const char * name));
-#endif
-#endif
-
-
-/*
- * Some important notes:
- *   The allocation routines provided here must never return NULL.
- *   They should exit to error_exit if unsuccessful.
- *
- *   It's not a good idea to try to merge the sarray and barray routines,
- *   even though they are textually almost the same, because samples are
- *   usually stored as bytes while coefficients are shorts or ints.  Thus,
- *   in machines where byte pointers have a different representation from
- *   word pointers, the resulting machine code could not be the same.
- */
-
-
-/*
- * Many machines require storage alignment: longs must start on 4-byte
- * boundaries, doubles on 8-byte boundaries, etc.  On such machines, malloc()
- * always returns pointers that are multiples of the worst-case alignment
- * requirement, and we had better do so too.
- * There isn't any really portable way to determine the worst-case alignment
- * requirement.  This module assumes that the alignment requirement is
- * multiples of sizeof(ALIGN_TYPE).
- * By default, we define ALIGN_TYPE as double.  This is necessary on some
- * workstations (where doubles really do need 8-byte alignment) and will work
- * fine on nearly everything.  If your machine has lesser alignment needs,
- * you can save a few bytes by making ALIGN_TYPE smaller.
- * The only place I know of where this will NOT work is certain Macintosh
- * 680x0 compilers that define double as a 10-byte IEEE extended float.
- * Doing 10-byte alignment is counterproductive because longwords won't be
- * aligned well.  Put "#define ALIGN_TYPE long" in jconfig.h if you have
- * such a compiler.
- */
-
-#ifndef ALIGN_TYPE		/* so can override from jconfig.h */
-#define ALIGN_TYPE  double
-#endif
-
-
-/*
- * We allocate objects from "pools", where each pool is gotten with a single
- * request to jpeg_get_small() or jpeg_get_large().  There is no per-object
- * overhead within a pool, except for alignment padding.  Each pool has a
- * header with a link to the next pool of the same class.
- * Small and large pool headers are identical except that the latter's
- * link pointer must be FAR on 80x86 machines.
- * Notice that the "real" header fields are union'ed with a dummy ALIGN_TYPE
- * field.  This forces the compiler to make SIZEOF(small_pool_hdr) a multiple
- * of the alignment requirement of ALIGN_TYPE.
- */
-
-typedef union small_pool_struct * small_pool_ptr;
-
-typedef union small_pool_struct {
-  struct {
-    small_pool_ptr next;	/* next in list of pools */
-    size_t bytes_used;		/* how many bytes already used within pool */
-    size_t bytes_left;		/* bytes still available in this pool */
-  } hdr;
-  ALIGN_TYPE dummy;		/* included in union to ensure alignment */
-} small_pool_hdr;
-
-typedef union large_pool_struct FAR * large_pool_ptr;
-
-typedef union large_pool_struct {
-  struct {
-    large_pool_ptr next;	/* next in list of pools */
-    size_t bytes_used;		/* how many bytes already used within pool */
-    size_t bytes_left;		/* bytes still available in this pool */
-  } hdr;
-  ALIGN_TYPE dummy;		/* included in union to ensure alignment */
-} large_pool_hdr;
-
-
-/*
- * Here is the full definition of a memory manager object.
- */
-
-typedef struct {
-  struct jpeg_memory_mgr pub;	/* public fields */
-
-  /* Each pool identifier (lifetime class) names a linked list of pools. */
-  small_pool_ptr small_list[JPOOL_NUMPOOLS];
-  large_pool_ptr large_list[JPOOL_NUMPOOLS];
-
-  /* Since we only have one lifetime class of virtual arrays, only one
-   * linked list is necessary (for each datatype).  Note that the virtual
-   * array control blocks being linked together are actually stored somewhere
-   * in the small-pool list.
-   */
-  jvirt_sarray_ptr virt_sarray_list;
-  jvirt_barray_ptr virt_barray_list;
-
-  /* This counts total space obtained from jpeg_get_small/large */
-  long total_space_allocated;
-
-  /* alloc_sarray and alloc_barray set this value for use by virtual
-   * array routines.
-   */
-  JDIMENSION last_rowsperchunk;	/* from most recent alloc_sarray/barray */
-} my_memory_mgr;
-
-typedef my_memory_mgr * my_mem_ptr;
-
-
-/*
- * The control blocks for virtual arrays.
- * Note that these blocks are allocated in the "small" pool area.
- * System-dependent info for the associated backing store (if any) is hidden
- * inside the backing_store_info struct.
- */
-
-struct jvirt_sarray_control {
-  JSAMPARRAY mem_buffer;	/* => the in-memory buffer */
-  JDIMENSION rows_in_array;	/* total virtual array height */
-  JDIMENSION samplesperrow;	/* width of array (and of memory buffer) */
-  JDIMENSION maxaccess;		/* max rows accessed by access_virt_sarray */
-  JDIMENSION rows_in_mem;	/* height of memory buffer */
-  JDIMENSION rowsperchunk;	/* allocation chunk size in mem_buffer */
-  JDIMENSION cur_start_row;	/* first logical row # in the buffer */
-  JDIMENSION first_undef_row;	/* row # of first uninitialized row */
-  boolean pre_zero;		/* pre-zero mode requested? */
-  boolean dirty;		/* do current buffer contents need written? */
-  boolean b_s_open;		/* is backing-store data valid? */
-  jvirt_sarray_ptr next;	/* link to next virtual sarray control block */
-  backing_store_info b_s_info;	/* System-dependent control info */
-};
-
-struct jvirt_barray_control {
-  JBLOCKARRAY mem_buffer;	/* => the in-memory buffer */
-  JDIMENSION rows_in_array;	/* total virtual array height */
-  JDIMENSION blocksperrow;	/* width of array (and of memory buffer) */
-  JDIMENSION maxaccess;		/* max rows accessed by access_virt_barray */
-  JDIMENSION rows_in_mem;	/* height of memory buffer */
-  JDIMENSION rowsperchunk;	/* allocation chunk size in mem_buffer */
-  JDIMENSION cur_start_row;	/* first logical row # in the buffer */
-  JDIMENSION first_undef_row;	/* row # of first uninitialized row */
-  boolean pre_zero;		/* pre-zero mode requested? */
-  boolean dirty;		/* do current buffer contents need written? */
-  boolean b_s_open;		/* is backing-store data valid? */
-  jvirt_barray_ptr next;	/* link to next virtual barray control block */
-  backing_store_info b_s_info;	/* System-dependent control info */
-};
-
-
-#ifdef MEM_STATS		/* optional extra stuff for statistics */
-
-LOCAL(void)
-print_mem_stats (j_common_ptr cinfo, int pool_id)
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  small_pool_ptr shdr_ptr;
-  large_pool_ptr lhdr_ptr;
-
-  /* Since this is only a debugging stub, we can cheat a little by using
-   * fprintf directly rather than going through the trace message code.
-   * This is helpful because message parm array can't handle longs.
-   */
-  fprintf(stderr, "Freeing pool %d, total space = %ld\n",
-	  pool_id, mem->total_space_allocated);
-
-  for (lhdr_ptr = mem->large_list[pool_id]; lhdr_ptr != NULL;
-       lhdr_ptr = lhdr_ptr->hdr.next) {
-    fprintf(stderr, "  Large chunk used %ld\n",
-	    (long) lhdr_ptr->hdr.bytes_used);
-  }
-
-  for (shdr_ptr = mem->small_list[pool_id]; shdr_ptr != NULL;
-       shdr_ptr = shdr_ptr->hdr.next) {
-    fprintf(stderr, "  Small chunk used %ld free %ld\n",
-	    (long) shdr_ptr->hdr.bytes_used,
-	    (long) shdr_ptr->hdr.bytes_left);
-  }
-}
-
-#endif /* MEM_STATS */
-
-
-LOCAL(void)
-out_of_memory (j_common_ptr cinfo, int which)
-/* Report an out-of-memory error and stop execution */
-/* If we compiled MEM_STATS support, report alloc requests before dying */
-{
-#ifdef MEM_STATS
-  cinfo->err->trace_level = 2;	/* force self_destruct to report stats */
-#endif
-  ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, which);
-}
-
-
-/*
- * Allocation of "small" objects.
- *
- * For these, we use pooled storage.  When a new pool must be created,
- * we try to get enough space for the current request plus a "slop" factor,
- * where the slop will be the amount of leftover space in the new pool.
- * The speed vs. space tradeoff is largely determined by the slop values.
- * A different slop value is provided for each pool class (lifetime),
- * and we also distinguish the first pool of a class from later ones.
- * NOTE: the values given work fairly well on both 16- and 32-bit-int
- * machines, but may be too small if longs are 64 bits or more.
- */
-
-static const size_t first_pool_slop[JPOOL_NUMPOOLS] = 
-{
-	1600,			/* first PERMANENT pool */
-	16000			/* first IMAGE pool */
-};
-
-static const size_t extra_pool_slop[JPOOL_NUMPOOLS] = 
-{
-	0,			/* additional PERMANENT pools */
-	5000			/* additional IMAGE pools */
-};
-
-#define MIN_SLOP  50		/* greater than 0 to avoid futile looping */
-
-
-METHODDEF(void *)
-alloc_small (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
-/* Allocate a "small" object */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  small_pool_ptr hdr_ptr, prev_hdr_ptr;
-  char * data_ptr;
-  size_t odd_bytes, min_request, slop;
-
-  /* Check for unsatisfiable request (do now to ensure no overflow below) */
-  if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(small_pool_hdr)))
-    out_of_memory(cinfo, 1);	/* request exceeds malloc's ability */
-
-  /* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
-  odd_bytes = sizeofobject % SIZEOF(ALIGN_TYPE);
-  if (odd_bytes > 0)
-    sizeofobject += SIZEOF(ALIGN_TYPE) - odd_bytes;
-
-  /* See if space is available in any existing pool */
-  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
-    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
-  prev_hdr_ptr = NULL;
-  hdr_ptr = mem->small_list[pool_id];
-  while (hdr_ptr != NULL) {
-    if (hdr_ptr->hdr.bytes_left >= sizeofobject)
-      break;			/* found pool with enough space */
-    prev_hdr_ptr = hdr_ptr;
-    hdr_ptr = hdr_ptr->hdr.next;
-  }
-
-  /* Time to make a new pool? */
-  if (hdr_ptr == NULL) {
-    /* min_request is what we need now, slop is what will be leftover */
-    min_request = sizeofobject + SIZEOF(small_pool_hdr);
-    if (prev_hdr_ptr == NULL)	/* first pool in class? */
-      slop = first_pool_slop[pool_id];
-    else
-      slop = extra_pool_slop[pool_id];
-    /* Don't ask for more than MAX_ALLOC_CHUNK */
-    if (slop > (size_t) (MAX_ALLOC_CHUNK-min_request))
-      slop = (size_t) (MAX_ALLOC_CHUNK-min_request);
-    /* Try to get space, if fail reduce slop and try again */
-    for (;;) {
-      hdr_ptr = (small_pool_ptr) jpeg_get_small(cinfo, min_request + slop);
-      if (hdr_ptr != NULL)
-	break;
-      slop /= 2;
-      if (slop < MIN_SLOP)	/* give up when it gets real small */
-	out_of_memory(cinfo, 2); /* jpeg_get_small failed */
-    }
-    mem->total_space_allocated += min_request + slop;
-    /* Success, initialize the new pool header and add to end of list */
-    hdr_ptr->hdr.next = NULL;
-    hdr_ptr->hdr.bytes_used = 0;
-    hdr_ptr->hdr.bytes_left = sizeofobject + slop;
-    if (prev_hdr_ptr == NULL)	/* first pool in class? */
-      mem->small_list[pool_id] = hdr_ptr;
-    else
-      prev_hdr_ptr->hdr.next = hdr_ptr;
-  }
-
-  /* OK, allocate the object from the current pool */
-  data_ptr = (char *) (hdr_ptr + 1); /* point to first data byte in pool */
-  data_ptr += hdr_ptr->hdr.bytes_used; /* point to place for object */
-  hdr_ptr->hdr.bytes_used += sizeofobject;
-  hdr_ptr->hdr.bytes_left -= sizeofobject;
-
-  return (void *) data_ptr;
-}
-
-
-/*
- * Allocation of "large" objects.
- *
- * The external semantics of these are the same as "small" objects,
- * except that FAR pointers are used on 80x86.  However the pool
- * management heuristics are quite different.  We assume that each
- * request is large enough that it may as well be passed directly to
- * jpeg_get_large; the pool management just links everything together
- * so that we can free it all on demand.
- * Note: the major use of "large" objects is in JSAMPARRAY and JBLOCKARRAY
- * structures.  The routines that create these structures (see below)
- * deliberately bunch rows together to ensure a large request size.
- */
-
-METHODDEF(void FAR *)
-alloc_large (j_common_ptr cinfo, int pool_id, size_t sizeofobject)
-/* Allocate a "large" object */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  large_pool_ptr hdr_ptr;
-  size_t odd_bytes;
-
-  /* Check for unsatisfiable request (do now to ensure no overflow below) */
-  if (sizeofobject > (size_t) (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)))
-    out_of_memory(cinfo, 3);	/* request exceeds malloc's ability */
-
-  /* Round up the requested size to a multiple of SIZEOF(ALIGN_TYPE) */
-  odd_bytes = sizeofobject % SIZEOF(ALIGN_TYPE);
-  if (odd_bytes > 0)
-    sizeofobject += SIZEOF(ALIGN_TYPE) - odd_bytes;
-
-  /* Always make a new pool */
-  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
-    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
-
-  hdr_ptr = (large_pool_ptr) jpeg_get_large(cinfo, sizeofobject +
-					    SIZEOF(large_pool_hdr));
-  if (hdr_ptr == NULL)
-    out_of_memory(cinfo, 4);	/* jpeg_get_large failed */
-  mem->total_space_allocated += sizeofobject + SIZEOF(large_pool_hdr);
-
-  /* Success, initialize the new pool header and add to list */
-  hdr_ptr->hdr.next = mem->large_list[pool_id];
-  /* We maintain space counts in each pool header for statistical purposes,
-   * even though they are not needed for allocation.
-   */
-  hdr_ptr->hdr.bytes_used = sizeofobject;
-  hdr_ptr->hdr.bytes_left = 0;
-  mem->large_list[pool_id] = hdr_ptr;
-
-  return (void FAR *) (hdr_ptr + 1); /* point to first data byte in pool */
-}
-
-
-/*
- * Creation of 2-D sample arrays.
- * The pointers are in near heap, the samples themselves in FAR heap.
- *
- * To minimize allocation overhead and to allow I/O of large contiguous
- * blocks, we allocate the sample rows in groups of as many rows as possible
- * without exceeding MAX_ALLOC_CHUNK total bytes per allocation request.
- * NB: the virtual array control routines, later in this file, know about
- * this chunking of rows.  The rowsperchunk value is left in the mem manager
- * object so that it can be saved away if this sarray is the workspace for
- * a virtual array.
- */
-
-METHODDEF(JSAMPARRAY)
-alloc_sarray (j_common_ptr cinfo, int pool_id,
-	      JDIMENSION samplesperrow, JDIMENSION numrows)
-/* Allocate a 2-D sample array */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  JSAMPARRAY result;
-  JSAMPROW workspace;
-  JDIMENSION rowsperchunk, currow, i;
-  long ltemp;
-
-  /* Calculate max # of rows allowed in one allocation chunk */
-  ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
-	  ((long) samplesperrow * SIZEOF(JSAMPLE));
-  if (ltemp <= 0)
-    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
-  if (ltemp < (long) numrows)
-    rowsperchunk = (JDIMENSION) ltemp;
-  else
-    rowsperchunk = numrows;
-  mem->last_rowsperchunk = rowsperchunk;
-
-  /* Get space for row pointers (small object) */
-  result = (JSAMPARRAY) alloc_small(cinfo, pool_id,
-				    (size_t) (numrows * SIZEOF(JSAMPROW)));
-
-  /* Get the rows themselves (large objects) */
-  currow = 0;
-  while (currow < numrows) {
-    rowsperchunk = MIN(rowsperchunk, numrows - currow);
-    workspace = (JSAMPROW) alloc_large(cinfo, pool_id,
-	(size_t) ((size_t) rowsperchunk * (size_t) samplesperrow
-		  * SIZEOF(JSAMPLE)));
-    for (i = rowsperchunk; i > 0; i--) {
-      result[currow++] = workspace;
-      workspace += samplesperrow;
-    }
-  }
-
-  return result;
-}
-
-
-/*
- * Creation of 2-D coefficient-block arrays.
- * This is essentially the same as the code for sample arrays, above.
- */
-
-METHODDEF(JBLOCKARRAY)
-alloc_barray (j_common_ptr cinfo, int pool_id,
-	      JDIMENSION blocksperrow, JDIMENSION numrows)
-/* Allocate a 2-D coefficient-block array */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  JBLOCKARRAY result;
-  JBLOCKROW workspace;
-  JDIMENSION rowsperchunk, currow, i;
-  long ltemp;
-
-  /* Calculate max # of rows allowed in one allocation chunk */
-  ltemp = (MAX_ALLOC_CHUNK-SIZEOF(large_pool_hdr)) /
-	  ((long) blocksperrow * SIZEOF(JBLOCK));
-  if (ltemp <= 0)
-    ERREXIT(cinfo, JERR_WIDTH_OVERFLOW);
-  if (ltemp < (long) numrows)
-    rowsperchunk = (JDIMENSION) ltemp;
-  else
-    rowsperchunk = numrows;
-  mem->last_rowsperchunk = rowsperchunk;
-
-  /* Get space for row pointers (small object) */
-  result = (JBLOCKARRAY) alloc_small(cinfo, pool_id,
-				     (size_t) (numrows * SIZEOF(JBLOCKROW)));
-
-  /* Get the rows themselves (large objects) */
-  currow = 0;
-  while (currow < numrows) {
-    rowsperchunk = MIN(rowsperchunk, numrows - currow);
-    workspace = (JBLOCKROW) alloc_large(cinfo, pool_id,
-	(size_t) ((size_t) rowsperchunk * (size_t) blocksperrow
-		  * SIZEOF(JBLOCK)));
-    for (i = rowsperchunk; i > 0; i--) {
-      result[currow++] = workspace;
-      workspace += blocksperrow;
-    }
-  }
-
-  return result;
-}
-
-
-/*
- * About virtual array management:
- *
- * The above "normal" array routines are only used to allocate strip buffers
- * (as wide as the image, but just a few rows high).  Full-image-sized buffers
- * are handled as "virtual" arrays.  The array is still accessed a strip at a
- * time, but the memory manager must save the whole array for repeated
- * accesses.  The intended implementation is that there is a strip buffer in
- * memory (as high as is possible given the desired memory limit), plus a
- * backing file that holds the rest of the array.
- *
- * The request_virt_array routines are told the total size of the image and
- * the maximum number of rows that will be accessed at once.  The in-memory
- * buffer must be at least as large as the maxaccess value.
- *
- * The request routines create control blocks but not the in-memory buffers.
- * That is postponed until realize_virt_arrays is called.  At that time the
- * total amount of space needed is known (approximately, anyway), so free
- * memory can be divided up fairly.
- *
- * The access_virt_array routines are responsible for making a specific strip
- * area accessible (after reading or writing the backing file, if necessary).
- * Note that the access routines are told whether the caller intends to modify
- * the accessed strip; during a read-only pass this saves having to rewrite
- * data to disk.  The access routines are also responsible for pre-zeroing
- * any newly accessed rows, if pre-zeroing was requested.
- *
- * In current usage, the access requests are usually for nonoverlapping
- * strips; that is, successive access start_row numbers differ by exactly
- * num_rows = maxaccess.  This means we can get good performance with simple
- * buffer dump/reload logic, by making the in-memory buffer be a multiple
- * of the access height; then there will never be accesses across bufferload
- * boundaries.  The code will still work with overlapping access requests,
- * but it doesn't handle bufferload overlaps very efficiently.
- */
-
-
-METHODDEF(jvirt_sarray_ptr)
-request_virt_sarray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
-		     JDIMENSION samplesperrow, JDIMENSION numrows,
-		     JDIMENSION maxaccess)
-/* Request a virtual 2-D sample array */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  jvirt_sarray_ptr result;
-
-  /* Only IMAGE-lifetime virtual arrays are currently supported */
-  if (pool_id != JPOOL_IMAGE)
-    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
-
-  /* get control block */
-  result = (jvirt_sarray_ptr) alloc_small(cinfo, pool_id,
-					  SIZEOF(struct jvirt_sarray_control));
-
-  result->mem_buffer = NULL;	/* marks array not yet realized */
-  result->rows_in_array = numrows;
-  result->samplesperrow = samplesperrow;
-  result->maxaccess = maxaccess;
-  result->pre_zero = pre_zero;
-  result->b_s_open = FALSE;	/* no associated backing-store object */
-  result->next = mem->virt_sarray_list; /* add to list of virtual arrays */
-  mem->virt_sarray_list = result;
-
-  return result;
-}
-
-
-METHODDEF(jvirt_barray_ptr)
-request_virt_barray (j_common_ptr cinfo, int pool_id, boolean pre_zero,
-		     JDIMENSION blocksperrow, JDIMENSION numrows,
-		     JDIMENSION maxaccess)
-/* Request a virtual 2-D coefficient-block array */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  jvirt_barray_ptr result;
-
-  /* Only IMAGE-lifetime virtual arrays are currently supported */
-  if (pool_id != JPOOL_IMAGE)
-    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
-
-  /* get control block */
-  result = (jvirt_barray_ptr) alloc_small(cinfo, pool_id,
-					  SIZEOF(struct jvirt_barray_control));
-
-  result->mem_buffer = NULL;	/* marks array not yet realized */
-  result->rows_in_array = numrows;
-  result->blocksperrow = blocksperrow;
-  result->maxaccess = maxaccess;
-  result->pre_zero = pre_zero;
-  result->b_s_open = FALSE;	/* no associated backing-store object */
-  result->next = mem->virt_barray_list; /* add to list of virtual arrays */
-  mem->virt_barray_list = result;
-
-  return result;
-}
-
-
-METHODDEF(void)
-realize_virt_arrays (j_common_ptr cinfo)
-/* Allocate the in-memory buffers for any unrealized virtual arrays */
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  long space_per_minheight, maximum_space, avail_mem;
-  long minheights, max_minheights;
-  jvirt_sarray_ptr sptr;
-  jvirt_barray_ptr bptr;
-
-  /* Compute the minimum space needed (maxaccess rows in each buffer)
-   * and the maximum space needed (full image height in each buffer).
-   * These may be of use to the system-dependent jpeg_mem_available routine.
-   */
-  space_per_minheight = 0;
-  maximum_space = 0;
-  for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
-    if (sptr->mem_buffer == NULL) { /* if not realized yet */
-      space_per_minheight += (long) sptr->maxaccess *
-			     (long) sptr->samplesperrow * SIZEOF(JSAMPLE);
-      maximum_space += (long) sptr->rows_in_array *
-		       (long) sptr->samplesperrow * SIZEOF(JSAMPLE);
-    }
-  }
-  for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
-    if (bptr->mem_buffer == NULL) { /* if not realized yet */
-      space_per_minheight += (long) bptr->maxaccess *
-			     (long) bptr->blocksperrow * SIZEOF(JBLOCK);
-      maximum_space += (long) bptr->rows_in_array *
-		       (long) bptr->blocksperrow * SIZEOF(JBLOCK);
-    }
-  }
-
-  if (space_per_minheight <= 0)
-    return;			/* no unrealized arrays, no work */
-
-  /* Determine amount of memory to actually use; this is system-dependent. */
-  avail_mem = jpeg_mem_available(cinfo, space_per_minheight, maximum_space,
-				 mem->total_space_allocated);
-
-  /* If the maximum space needed is available, make all the buffers full
-   * height; otherwise parcel it out with the same number of minheights
-   * in each buffer.
-   */
-  if (avail_mem >= maximum_space)
-    max_minheights = 1000000000L;
-  else {
-    max_minheights = avail_mem / space_per_minheight;
-    /* If there doesn't seem to be enough space, try to get the minimum
-     * anyway.  This allows a "stub" implementation of jpeg_mem_available().
-     */
-    if (max_minheights <= 0)
-      max_minheights = 1;
-  }
-
-  /* Allocate the in-memory buffers and initialize backing store as needed. */
-
-  for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
-    if (sptr->mem_buffer == NULL) { /* if not realized yet */
-      minheights = ((long) sptr->rows_in_array - 1L) / sptr->maxaccess + 1L;
-      if (minheights <= max_minheights) {
-	/* This buffer fits in memory */
-	sptr->rows_in_mem = sptr->rows_in_array;
-      } else {
-	/* It doesn't fit in memory, create backing store. */
-	sptr->rows_in_mem = (JDIMENSION) (max_minheights * sptr->maxaccess);
-	jpeg_open_backing_store(cinfo, & sptr->b_s_info,
-				(long) sptr->rows_in_array *
-				(long) sptr->samplesperrow *
-				(long) SIZEOF(JSAMPLE));
-	sptr->b_s_open = TRUE;
-      }
-      sptr->mem_buffer = alloc_sarray(cinfo, JPOOL_IMAGE,
-				      sptr->samplesperrow, sptr->rows_in_mem);
-      sptr->rowsperchunk = mem->last_rowsperchunk;
-      sptr->cur_start_row = 0;
-      sptr->first_undef_row = 0;
-      sptr->dirty = FALSE;
-    }
-  }
-
-  for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
-    if (bptr->mem_buffer == NULL) { /* if not realized yet */
-      minheights = ((long) bptr->rows_in_array - 1L) / bptr->maxaccess + 1L;
-      if (minheights <= max_minheights) {
-	/* This buffer fits in memory */
-	bptr->rows_in_mem = bptr->rows_in_array;
-      } else {
-	/* It doesn't fit in memory, create backing store. */
-	bptr->rows_in_mem = (JDIMENSION) (max_minheights * bptr->maxaccess);
-	jpeg_open_backing_store(cinfo, & bptr->b_s_info,
-				(long) bptr->rows_in_array *
-				(long) bptr->blocksperrow *
-				(long) SIZEOF(JBLOCK));
-	bptr->b_s_open = TRUE;
-      }
-      bptr->mem_buffer = alloc_barray(cinfo, JPOOL_IMAGE,
-				      bptr->blocksperrow, bptr->rows_in_mem);
-      bptr->rowsperchunk = mem->last_rowsperchunk;
-      bptr->cur_start_row = 0;
-      bptr->first_undef_row = 0;
-      bptr->dirty = FALSE;
-    }
-  }
-}
-
-
-LOCAL(void)
-do_sarray_io (j_common_ptr cinfo, jvirt_sarray_ptr ptr, boolean writing)
-/* Do backing store read or write of a virtual sample array */
-{
-  long bytesperrow, file_offset, byte_count, rows, thisrow, i;
-
-  bytesperrow = (long) ptr->samplesperrow * SIZEOF(JSAMPLE);
-  file_offset = ptr->cur_start_row * bytesperrow;
-  /* Loop to read or write each allocation chunk in mem_buffer */
-  for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
-    /* One chunk, but check for short chunk at end of buffer */
-    rows = MIN((long) ptr->rowsperchunk, (long) ptr->rows_in_mem - i);
-    /* Transfer no more than is currently defined */
-    thisrow = (long) ptr->cur_start_row + i;
-    rows = MIN(rows, (long) ptr->first_undef_row - thisrow);
-    /* Transfer no more than fits in file */
-    rows = MIN(rows, (long) ptr->rows_in_array - thisrow);
-    if (rows <= 0)		/* this chunk might be past end of file! */
-      break;
-    byte_count = rows * bytesperrow;
-    if (writing)
-      (*ptr->b_s_info.write_backing_store) (cinfo, & ptr->b_s_info,
-					    (void FAR *) ptr->mem_buffer[i],
-					    file_offset, byte_count);
-    else
-      (*ptr->b_s_info.read_backing_store) (cinfo, & ptr->b_s_info,
-					   (void FAR *) ptr->mem_buffer[i],
-					   file_offset, byte_count);
-    file_offset += byte_count;
-  }
-}
-
-
-LOCAL(void)
-do_barray_io (j_common_ptr cinfo, jvirt_barray_ptr ptr, boolean writing)
-/* Do backing store read or write of a virtual coefficient-block array */
-{
-  long bytesperrow, file_offset, byte_count, rows, thisrow, i;
-
-  bytesperrow = (long) ptr->blocksperrow * SIZEOF(JBLOCK);
-  file_offset = ptr->cur_start_row * bytesperrow;
-  /* Loop to read or write each allocation chunk in mem_buffer */
-  for (i = 0; i < (long) ptr->rows_in_mem; i += ptr->rowsperchunk) {
-    /* One chunk, but check for short chunk at end of buffer */
-    rows = MIN((long) ptr->rowsperchunk, (long) ptr->rows_in_mem - i);
-    /* Transfer no more than is currently defined */
-    thisrow = (long) ptr->cur_start_row + i;
-    rows = MIN(rows, (long) ptr->first_undef_row - thisrow);
-    /* Transfer no more than fits in file */
-    rows = MIN(rows, (long) ptr->rows_in_array - thisrow);
-    if (rows <= 0)		/* this chunk might be past end of file! */
-      break;
-    byte_count = rows * bytesperrow;
-    if (writing)
-      (*ptr->b_s_info.write_backing_store) (cinfo, & ptr->b_s_info,
-					    (void FAR *) ptr->mem_buffer[i],
-					    file_offset, byte_count);
-    else
-      (*ptr->b_s_info.read_backing_store) (cinfo, & ptr->b_s_info,
-					   (void FAR *) ptr->mem_buffer[i],
-					   file_offset, byte_count);
-    file_offset += byte_count;
-  }
-}
-
-
-METHODDEF(JSAMPARRAY)
-access_virt_sarray (j_common_ptr cinfo, jvirt_sarray_ptr ptr,
-		    JDIMENSION start_row, JDIMENSION num_rows,
-		    boolean writable)
-/* Access the part of a virtual sample array starting at start_row */
-/* and extending for num_rows rows.  writable is true if  */
-/* caller intends to modify the accessed area. */
-{
-  JDIMENSION end_row = start_row + num_rows;
-  JDIMENSION undef_row;
-
-  /* debugging check */
-  if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
-      ptr->mem_buffer == NULL)
-    ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-
-  /* Make the desired part of the virtual array accessible */
-  if (start_row < ptr->cur_start_row ||
-      end_row > ptr->cur_start_row+ptr->rows_in_mem) {
-    if (! ptr->b_s_open)
-      ERREXIT(cinfo, JERR_VIRTUAL_BUG);
-    /* Flush old buffer contents if necessary */
-    if (ptr->dirty) {
-      do_sarray_io(cinfo, ptr, TRUE);
-      ptr->dirty = FALSE;
-    }
-    /* Decide what part of virtual array to access.
-     * Algorithm: if target address > current window, assume forward scan,
-     * load starting at target address.  If target address < current window,
-     * assume backward scan, load so that target area is top of window.
-     * Note that when switching from forward write to forward read, will have
-     * start_row = 0, so the limiting case applies and we load from 0 anyway.
-     */
-    if (start_row > ptr->cur_start_row) {
-      ptr->cur_start_row = start_row;
-    } else {
-      /* use long arithmetic here to avoid overflow & unsigned problems */
-      long ltemp;
-
-      ltemp = (long) end_row - (long) ptr->rows_in_mem;
-      if (ltemp < 0)
-	ltemp = 0;		/* don't fall off front end of file */
-      ptr->cur_start_row = (JDIMENSION) ltemp;
-    }
-    /* Read in the selected part of the array.
-     * During the initial write pass, we will do no actual read
-     * because the selected part is all undefined.
-     */
-    do_sarray_io(cinfo, ptr, FALSE);
-  }
-  /* Ensure the accessed part of the array is defined; prezero if needed.
-   * To improve locality of access, we only prezero the part of the array
-   * that the caller is about to access, not the entire in-memory array.
-   */
-  if (ptr->first_undef_row < end_row) {
-    if (ptr->first_undef_row < start_row) {
-      if (writable)		/* writer skipped over a section of array */
-	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-      undef_row = start_row;	/* but reader is allowed to read ahead */
-    } else {
-      undef_row = ptr->first_undef_row;
-    }
-    if (writable)
-      ptr->first_undef_row = end_row;
-    if (ptr->pre_zero) {
-      size_t bytesperrow = (size_t) ptr->samplesperrow * SIZEOF(JSAMPLE);
-      undef_row -= ptr->cur_start_row; /* make indexes relative to buffer */
-      end_row -= ptr->cur_start_row;
-      while (undef_row < end_row) {
-	jzero_far((void FAR *) ptr->mem_buffer[undef_row], bytesperrow);
-	undef_row++;
-      }
-    } else {
-      if (! writable)		/* reader looking at undefined data */
-	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-    }
-  }
-  /* Flag the buffer dirty if caller will write in it */
-  if (writable)
-    ptr->dirty = TRUE;
-  /* Return address of proper part of the buffer */
-  return ptr->mem_buffer + (start_row - ptr->cur_start_row);
-}
-
-
-METHODDEF(JBLOCKARRAY)
-access_virt_barray (j_common_ptr cinfo, jvirt_barray_ptr ptr,
-		    JDIMENSION start_row, JDIMENSION num_rows,
-		    boolean writable)
-/* Access the part of a virtual block array starting at start_row */
-/* and extending for num_rows rows.  writable is true if  */
-/* caller intends to modify the accessed area. */
-{
-  JDIMENSION end_row = start_row + num_rows;
-  JDIMENSION undef_row;
-
-  /* debugging check */
-  if (end_row > ptr->rows_in_array || num_rows > ptr->maxaccess ||
-      ptr->mem_buffer == NULL)
-    ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-
-  /* Make the desired part of the virtual array accessible */
-  if (start_row < ptr->cur_start_row ||
-      end_row > ptr->cur_start_row+ptr->rows_in_mem) {
-    if (! ptr->b_s_open)
-      ERREXIT(cinfo, JERR_VIRTUAL_BUG);
-    /* Flush old buffer contents if necessary */
-    if (ptr->dirty) {
-      do_barray_io(cinfo, ptr, TRUE);
-      ptr->dirty = FALSE;
-    }
-    /* Decide what part of virtual array to access.
-     * Algorithm: if target address > current window, assume forward scan,
-     * load starting at target address.  If target address < current window,
-     * assume backward scan, load so that target area is top of window.
-     * Note that when switching from forward write to forward read, will have
-     * start_row = 0, so the limiting case applies and we load from 0 anyway.
-     */
-    if (start_row > ptr->cur_start_row) {
-      ptr->cur_start_row = start_row;
-    } else {
-      /* use long arithmetic here to avoid overflow & unsigned problems */
-      long ltemp;
-
-      ltemp = (long) end_row - (long) ptr->rows_in_mem;
-      if (ltemp < 0)
-	ltemp = 0;		/* don't fall off front end of file */
-      ptr->cur_start_row = (JDIMENSION) ltemp;
-    }
-    /* Read in the selected part of the array.
-     * During the initial write pass, we will do no actual read
-     * because the selected part is all undefined.
-     */
-    do_barray_io(cinfo, ptr, FALSE);
-  }
-  /* Ensure the accessed part of the array is defined; prezero if needed.
-   * To improve locality of access, we only prezero the part of the array
-   * that the caller is about to access, not the entire in-memory array.
-   */
-  if (ptr->first_undef_row < end_row) {
-    if (ptr->first_undef_row < start_row) {
-      if (writable)		/* writer skipped over a section of array */
-	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-      undef_row = start_row;	/* but reader is allowed to read ahead */
-    } else {
-      undef_row = ptr->first_undef_row;
-    }
-    if (writable)
-      ptr->first_undef_row = end_row;
-    if (ptr->pre_zero) {
-      size_t bytesperrow = (size_t) ptr->blocksperrow * SIZEOF(JBLOCK);
-      undef_row -= ptr->cur_start_row; /* make indexes relative to buffer */
-      end_row -= ptr->cur_start_row;
-      while (undef_row < end_row) {
-	jzero_far((void FAR *) ptr->mem_buffer[undef_row], bytesperrow);
-	undef_row++;
-      }
-    } else {
-      if (! writable)		/* reader looking at undefined data */
-	ERREXIT(cinfo, JERR_BAD_VIRTUAL_ACCESS);
-    }
-  }
-  /* Flag the buffer dirty if caller will write in it */
-  if (writable)
-    ptr->dirty = TRUE;
-  /* Return address of proper part of the buffer */
-  return ptr->mem_buffer + (start_row - ptr->cur_start_row);
-}
-
-
-/*
- * Release all objects belonging to a specified pool.
- */
-
-METHODDEF(void)
-free_pool (j_common_ptr cinfo, int pool_id)
-{
-  my_mem_ptr mem = (my_mem_ptr) cinfo->mem;
-  small_pool_ptr shdr_ptr;
-  large_pool_ptr lhdr_ptr;
-  size_t space_freed;
-
-  if (pool_id < 0 || pool_id >= JPOOL_NUMPOOLS)
-    ERREXIT1(cinfo, JERR_BAD_POOL_ID, pool_id);	/* safety check */
-
-#ifdef MEM_STATS
-  if (cinfo->err->trace_level > 1)
-    print_mem_stats(cinfo, pool_id); /* print pool's memory usage statistics */
-#endif
-
-  /* If freeing IMAGE pool, close any virtual arrays first */
-  if (pool_id == JPOOL_IMAGE) {
-    jvirt_sarray_ptr sptr;
-    jvirt_barray_ptr bptr;
-
-    for (sptr = mem->virt_sarray_list; sptr != NULL; sptr = sptr->next) {
-      if (sptr->b_s_open) {	/* there may be no backing store */
-	sptr->b_s_open = FALSE;	/* prevent recursive close if error */
-	(*sptr->b_s_info.close_backing_store) (cinfo, & sptr->b_s_info);
-      }
-    }
-    mem->virt_sarray_list = NULL;
-    for (bptr = mem->virt_barray_list; bptr != NULL; bptr = bptr->next) {
-      if (bptr->b_s_open) {	/* there may be no backing store */
-	bptr->b_s_open = FALSE;	/* prevent recursive close if error */
-	(*bptr->b_s_info.close_backing_store) (cinfo, & bptr->b_s_info);
-      }
-    }
-    mem->virt_barray_list = NULL;
-  }
-
-  /* Release large objects */
-  lhdr_ptr = mem->large_list[pool_id];
-  mem->large_list[pool_id] = NULL;
-
-  while (lhdr_ptr != NULL) {
-    large_pool_ptr next_lhdr_ptr = lhdr_ptr->hdr.next;
-    space_freed = lhdr_ptr->hdr.bytes_used +
-		  lhdr_ptr->hdr.bytes_left +
-		  SIZEOF(large_pool_hdr);
-    jpeg_free_large(cinfo, (void FAR *) lhdr_ptr, space_freed);
-    mem->total_space_allocated -= space_freed;
-    lhdr_ptr = next_lhdr_ptr;
-  }
-
-  /* Release small objects */
-  shdr_ptr = mem->small_list[pool_id];
-  mem->small_list[pool_id] = NULL;
-
-  while (shdr_ptr != NULL) {
-    small_pool_ptr next_shdr_ptr = shdr_ptr->hdr.next;
-    space_freed = shdr_ptr->hdr.bytes_used +
-		  shdr_ptr->hdr.bytes_left +
-		  SIZEOF(small_pool_hdr);
-    jpeg_free_small(cinfo, (void *) shdr_ptr, space_freed);
-    mem->total_space_allocated -= space_freed;
-    shdr_ptr = next_shdr_ptr;
-  }
-}
-
-
-/*
- * Close up shop entirely.
- * Note that this cannot be called unless cinfo->mem is non-NULL.
- */
-
-METHODDEF(void)
-self_destruct (j_common_ptr cinfo)
-{
-  int pool;
-
-  /* Close all backing store, release all memory.
-   * Releasing pools in reverse order might help avoid fragmentation
-   * with some (brain-damaged) malloc libraries.
-   */
-  for (pool = JPOOL_NUMPOOLS-1; pool >= JPOOL_PERMANENT; pool--) {
-    free_pool(cinfo, pool);
-  }
-
-  /* Release the memory manager control block too. */
-  jpeg_free_small(cinfo, (void *) cinfo->mem, SIZEOF(my_memory_mgr));
-  cinfo->mem = NULL;		/* ensures I will be called only once */
-
-  jpeg_mem_term(cinfo);		/* system-dependent cleanup */
-}
-
-
-/*
- * Memory manager initialization.
- * When this is called, only the error manager pointer is valid in cinfo!
- */
-
-GLOBAL(void)
-jinit_memory_mgr (j_common_ptr cinfo)
-{
-  my_mem_ptr mem;
-  long max_to_use;
-  int pool;
-  size_t test_mac;
-
-  cinfo->mem = NULL;		/* for safety if init fails */
-
-  /* Check for configuration errors.
-   * SIZEOF(ALIGN_TYPE) should be a power of 2; otherwise, it probably
-   * doesn't reflect any real hardware alignment requirement.
-   * The test is a little tricky: for X>0, X and X-1 have no one-bits
-   * in common if and only if X is a power of 2, ie has only one one-bit.
-   * Some compilers may give an "unreachable code" warning here; ignore it.
-   */
-  if ((SIZEOF(ALIGN_TYPE) & (SIZEOF(ALIGN_TYPE)-1)) != 0)
-    ERREXIT(cinfo, JERR_BAD_ALIGN_TYPE);
-  /* MAX_ALLOC_CHUNK must be representable as type size_t, and must be
-   * a multiple of SIZEOF(ALIGN_TYPE).
-   * Again, an "unreachable code" warning may be ignored here.
-   * But a "constant too large" warning means you need to fix MAX_ALLOC_CHUNK.
-   */
-  test_mac = (size_t) MAX_ALLOC_CHUNK;
-  if ((long) test_mac != MAX_ALLOC_CHUNK ||
-      (MAX_ALLOC_CHUNK % SIZEOF(ALIGN_TYPE)) != 0)
-    ERREXIT(cinfo, JERR_BAD_ALLOC_CHUNK);
-
-  max_to_use = jpeg_mem_init(cinfo); /* system-dependent initialization */
-
-  /* Attempt to allocate memory manager's control block */
-  mem = (my_mem_ptr) jpeg_get_small(cinfo, SIZEOF(my_memory_mgr));
-
-  if (mem == NULL) {
-    jpeg_mem_term(cinfo);	/* system-dependent cleanup */
-    ERREXIT1(cinfo, JERR_OUT_OF_MEMORY, 0);
-  }
-
-  /* OK, fill in the method pointers */
-  mem->pub.alloc_small = alloc_small;
-  mem->pub.alloc_large = alloc_large;
-  mem->pub.alloc_sarray = alloc_sarray;
-  mem->pub.alloc_barray = alloc_barray;
-  mem->pub.request_virt_sarray = request_virt_sarray;
-  mem->pub.request_virt_barray = request_virt_barray;
-  mem->pub.realize_virt_arrays = realize_virt_arrays;
-  mem->pub.access_virt_sarray = access_virt_sarray;
-  mem->pub.access_virt_barray = access_virt_barray;
-  mem->pub.free_pool = free_pool;
-  mem->pub.self_destruct = self_destruct;
-
-  /* Initialize working state */
-  mem->pub.max_memory_to_use = max_to_use;
-
-  for (pool = JPOOL_NUMPOOLS-1; pool >= JPOOL_PERMANENT; pool--) {
-    mem->small_list[pool] = NULL;
-    mem->large_list[pool] = NULL;
-  }
-  mem->virt_sarray_list = NULL;
-  mem->virt_barray_list = NULL;
-
-  mem->total_space_allocated = SIZEOF(my_memory_mgr);
-
-  /* Declare ourselves open for business */
-  cinfo->mem = & mem->pub;
-
-  /* Check for an environment variable JPEGMEM; if found, override the
-   * default max_memory setting from jpeg_mem_init.  Note that the
-   * surrounding application may again override this value.
-   * If your system doesn't support getenv(), define NO_GETENV to disable
-   * this feature.
-   */
-#ifndef NO_GETENV
-  { char * memenv;
-
-    if ((memenv = getenv("JPEGMEM")) != NULL) {
-      char ch = 'x';
-
-      if (sscanf(memenv, "%ld%c", &max_to_use, &ch) > 0) {
-	if (ch == 'm' || ch == 'M')
-	  max_to_use *= 1000L;
-	mem->pub.max_memory_to_use = max_to_use * 1000L;
-      }
-    }
-  }
-#endif
-
-}

cde/lib/DtHelp/jpeg/jmemnobs.c

@@ -1,132 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jmemnobs.c /main/2 1996/05/09 03:52:28 drk $ */
-/*
- * jmemnobs.c
- *
- * Copyright (C) 1992-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides a really simple implementation of the system-
- * dependent portion of the JPEG memory manager.  This implementation
- * assumes that no backing-store files are needed: all required space
- * can be obtained from malloc().
- * This is very portable in the sense that it'll compile on almost anything,
- * but you'd better have lots of main memory (or virtual memory) if you want
- * to process big images.
- * Note that the max_memory_to_use option is ignored by this implementation.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-#include "jmemsys.h"		/* import the system-dependent declarations */
-
-#ifndef HAVE_STDLIB_H		/* <stdlib.h> should declare malloc(),free() */
-extern void * malloc JPP((size_t size));
-extern void free JPP((void *ptr));
-#endif
-
-
-/*
- * Memory allocation and freeing are controlled by the regular library
- * routines malloc() and free().
- */
-
-GLOBAL(void *)
-jpeg_get_small (j_common_ptr cinfo, size_t sizeofobject)
-{
-  return (void *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_small (j_common_ptr cinfo, void * object, size_t sizeofobject)
-{
-  free(object);
-}
-
-
-/*
- * "Large" objects are treated the same as "small" ones.
- * NB: although we include FAR keywords in the routine declarations,
- * this file won't actually work in 80x86 small/medium model; at least,
- * you probably won't be able to process useful-size images in only 64KB.
- */
-
-GLOBAL(void FAR *)
-jpeg_get_large (j_common_ptr cinfo, size_t sizeofobject)
-{
-  return (void FAR *) malloc(sizeofobject);
-}
-
-GLOBAL(void)
-jpeg_free_large (j_common_ptr cinfo, void FAR * object, size_t sizeofobject)
-{
-  free(object);
-}
-
-
-/*
- * This routine computes the total memory space available for allocation.
- * Here we always say, "we got all you want bud!"
- */
-
-GLOBAL(long)
-jpeg_mem_available (j_common_ptr cinfo, long min_bytes_needed,
-		    long max_bytes_needed, long already_allocated)
-{
-  return max_bytes_needed;
-}
-
-
-/*
- * Backing store (temporary file) management.
- * Since jpeg_mem_available always promised the moon,
- * this should never be called and we can just error out.
- */
-
-GLOBAL(void)
-jpeg_open_backing_store (j_common_ptr cinfo, backing_store_ptr info,
-			 long total_bytes_needed)
-{
-  ERREXIT(cinfo, JERR_NO_BACKING_STORE);
-}
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.  Here, there isn't any.
- */
-
-GLOBAL(long)
-jpeg_mem_init (j_common_ptr cinfo)
-{
-  return 0;			/* just set max_memory_to_use to 0 */
-}
-
-GLOBAL(void)
-jpeg_mem_term (j_common_ptr cinfo)
-{
-  /* no work */
-}

cde/lib/DtHelp/jpeg/jmemsys.h

@@ -1,206 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jmemsys.h /main/2 1996/05/09 03:52:46 drk $ */
-/*
- * jmemsys.h
- *
- * Copyright (C) 1992-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This include file defines the interface between the system-independent
- * and system-dependent portions of the JPEG memory manager.  No other
- * modules need include it.  (The system-independent portion is jmemmgr.c;
- * there are several different versions of the system-dependent portion.)
- *
- * This file works as-is for the system-dependent memory managers supplied
- * in the IJG distribution.  You may need to modify it if you write a
- * custom memory manager.  If system-dependent changes are needed in
- * this file, the best method is to #ifdef them based on a configuration
- * symbol supplied in jconfig.h, as we have done with USE_MSDOS_MEMMGR.
- */
-
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_get_small		jGetSmall
-#define jpeg_free_small		jFreeSmall
-#define jpeg_get_large		jGetLarge
-#define jpeg_free_large		jFreeLarge
-#define jpeg_mem_available	jMemAvail
-#define jpeg_open_backing_store	jOpenBackStore
-#define jpeg_mem_init		jMemInit
-#define jpeg_mem_term		jMemTerm
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/*
- * These two functions are used to allocate and release small chunks of
- * memory.  (Typically the total amount requested through jpeg_get_small is
- * no more than 20K or so; this will be requested in chunks of a few K each.)
- * Behavior should be the same as for the standard library functions malloc
- * and free; in particular, jpeg_get_small must return NULL on failure.
- * On most systems, these ARE malloc and free.  jpeg_free_small is passed the
- * size of the object being freed, just in case it's needed.
- * On an 80x86 machine using small-data memory model, these manage near heap.
- */
-
-EXTERN(void *) jpeg_get_small JPP((j_common_ptr cinfo, size_t sizeofobject));
-EXTERN(void) jpeg_free_small JPP((j_common_ptr cinfo, void * object,
-				  size_t sizeofobject));
-
-/*
- * These two functions are used to allocate and release large chunks of
- * memory (up to the total free space designated by jpeg_mem_available).
- * The interface is the same as above, except that on an 80x86 machine,
- * far pointers are used.  On most other machines these are identical to
- * the jpeg_get/free_small routines; but we keep them separate anyway,
- * in case a different allocation strategy is desirable for large chunks.
- */
-
-EXTERN(void FAR *) jpeg_get_large JPP((j_common_ptr cinfo,
-				       size_t sizeofobject));
-EXTERN(void) jpeg_free_large JPP((j_common_ptr cinfo, void FAR * object,
-				  size_t sizeofobject));
-
-/*
- * The macro MAX_ALLOC_CHUNK designates the maximum number of bytes that may
- * be requested in a single call to jpeg_get_large (and jpeg_get_small for that
- * matter, but that case should never come into play).  This macro is needed
- * to model the 64Kb-segment-size limit of far addressing on 80x86 machines.
- * On those machines, we expect that jconfig.h will provide a proper value.
- * On machines with 32-bit flat address spaces, any large constant may be used.
- *
- * NB: jmemmgr.c expects that MAX_ALLOC_CHUNK will be representable as type
- * size_t and will be a multiple of sizeof(align_type).
- */
-
-#ifndef MAX_ALLOC_CHUNK		/* may be overridden in jconfig.h */
-#define MAX_ALLOC_CHUNK  1000000000L
-#endif
-
-/*
- * This routine computes the total space still available for allocation by
- * jpeg_get_large.  If more space than this is needed, backing store will be
- * used.  NOTE: any memory already allocated must not be counted.
- *
- * There is a minimum space requirement, corresponding to the minimum
- * feasible buffer sizes; jmemmgr.c will request that much space even if
- * jpeg_mem_available returns zero.  The maximum space needed, enough to hold
- * all working storage in memory, is also passed in case it is useful.
- * Finally, the total space already allocated is passed.  If no better
- * method is available, cinfo->mem->max_memory_to_use - already_allocated
- * is often a suitable calculation.
- *
- * It is OK for jpeg_mem_available to underestimate the space available
- * (that'll just lead to more backing-store access than is really necessary).
- * However, an overestimate will lead to failure.  Hence it's wise to subtract
- * a slop factor from the true available space.  5% should be enough.
- *
- * On machines with lots of virtual memory, any large constant may be returned.
- * Conversely, zero may be returned to always use the minimum amount of memory.
- */
-
-EXTERN(long) jpeg_mem_available JPP((j_common_ptr cinfo,
-				     long min_bytes_needed,
-				     long max_bytes_needed,
-				     long already_allocated));
-
-
-/*
- * This structure holds whatever state is needed to access a single
- * backing-store object.  The read/write/close method pointers are called
- * by jmemmgr.c to manipulate the backing-store object; all other fields
- * are private to the system-dependent backing store routines.
- */
-
-#define TEMP_NAME_LENGTH   64	/* max length of a temporary file's name */
-
-#ifdef USE_MSDOS_MEMMGR		/* DOS-specific junk */
-
-typedef unsigned short XMSH;	/* type of extended-memory handles */
-typedef unsigned short EMSH;	/* type of expanded-memory handles */
-
-typedef union {
-  short file_handle;		/* DOS file handle if it's a temp file */
-  XMSH xms_handle;		/* handle if it's a chunk of XMS */
-  EMSH ems_handle;		/* handle if it's a chunk of EMS */
-} handle_union;
-
-#endif /* USE_MSDOS_MEMMGR */
-
-typedef struct backing_store_struct * backing_store_ptr;
-
-typedef struct backing_store_struct {
-  /* Methods for reading/writing/closing this backing-store object */
-  JMETHOD(void, read_backing_store, (j_common_ptr cinfo,
-				     backing_store_ptr info,
-				     void FAR * buffer_address,
-				     long file_offset, long byte_count));
-  JMETHOD(void, write_backing_store, (j_common_ptr cinfo,
-				      backing_store_ptr info,
-				      void FAR * buffer_address,
-				      long file_offset, long byte_count));
-  JMETHOD(void, close_backing_store, (j_common_ptr cinfo,
-				      backing_store_ptr info));
-
-  /* Private fields for system-dependent backing-store management */
-#ifdef USE_MSDOS_MEMMGR
-  /* For the MS-DOS manager (jmemdos.c), we need: */
-  handle_union handle;		/* reference to backing-store storage object */
-  char temp_name[TEMP_NAME_LENGTH]; /* name if it's a file */
-#else
-  /* For a typical implementation with temp files, we need: */
-  FILE * temp_file;		/* stdio reference to temp file */
-  char temp_name[TEMP_NAME_LENGTH]; /* name of temp file */
-#endif
-} backing_store_info;
-
-/*
- * Initial opening of a backing-store object.  This must fill in the
- * read/write/close pointers in the object.  The read/write routines
- * may take an error exit if the specified maximum file size is exceeded.
- * (If jpeg_mem_available always returns a large value, this routine can
- * just take an error exit.)
- */
-
-EXTERN(void) jpeg_open_backing_store JPP((j_common_ptr cinfo,
-					  backing_store_ptr info,
-					  long total_bytes_needed));
-
-
-/*
- * These routines take care of any system-dependent initialization and
- * cleanup required.  jpeg_mem_init will be called before anything is
- * allocated (and, therefore, nothing in cinfo is of use except the error
- * manager pointer).  It should return a suitable default value for
- * max_memory_to_use; this may subsequently be overridden by the surrounding
- * application.  (Note that max_memory_to_use is only important if
- * jpeg_mem_available chooses to consult it ... no one else will.)
- * jpeg_mem_term may assume that all requested memory has been freed and that
- * all opened backing-store objects have been closed.
- */
-
-EXTERN(long) jpeg_mem_init JPP((j_common_ptr cinfo));
-EXTERN(void) jpeg_mem_term JPP((j_common_ptr cinfo));

cde/lib/DtHelp/jpeg/jmorecfg.h

@@ -1,385 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jmorecfg.h /main/2 1996/05/09 03:53:12 drk $ */
-/*
- * jmorecfg.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains additional configuration options that customize the
- * JPEG software for special applications or support machine-dependent
- * optimizations.  Most users will not need to touch this file.
- */
-
-
-/*
- * Define BITS_IN_JSAMPLE as either
- *   8   for 8-bit sample values (the usual setting)
- *   12  for 12-bit sample values
- * Only 8 and 12 are legal data precisions for lossy JPEG according to the
- * JPEG standard, and the IJG code does not support anything else!
- * We do not support run-time selection of data precision, sorry.
- */
-
-#define BITS_IN_JSAMPLE  8	/* use 8 or 12 */
-
-
-/*
- * Maximum number of components (color channels) allowed in JPEG image.
- * To meet the letter of the JPEG spec, set this to 255.  However, darn
- * few applications need more than 4 channels (maybe 5 for CMYK + alpha
- * mask).  We recommend 10 as a reasonable compromise; use 4 if you are
- * really short on memory.  (Each allowed component costs a hundred or so
- * bytes of storage, whether actually used in an image or not.)
- */
-
-#define MAX_COMPONENTS  10	/* maximum number of image components */
-
-
-/*
- * Basic data types.
- * You may need to change these if you have a machine with unusual data
- * type sizes; for example, "char" not 8 bits, "short" not 16 bits,
- * or "long" not 32 bits.  We don't care whether "int" is 16 or 32 bits,
- * but it had better be at least 16.
- */
-
-/* Representation of a single sample (pixel element value).
- * We frequently allocate large arrays of these, so it's important to keep
- * them small.  But if you have memory to burn and access to char or short
- * arrays is very slow on your hardware, you might want to change these.
- */
-
-#if BITS_IN_JSAMPLE == 8
-/* JSAMPLE should be the smallest type that will hold the values 0..255.
- * You can use a signed char by having GETJSAMPLE mask it with 0xFF.
- */
-
-#ifdef HAVE_UNSIGNED_CHAR
-
-typedef unsigned char JSAMPLE;
-#define GETJSAMPLE(value)  ((int) (value))
-
-#else /* not HAVE_UNSIGNED_CHAR */
-
-typedef char JSAMPLE;
-#ifdef CHAR_IS_UNSIGNED
-#define GETJSAMPLE(value)  ((int) (value))
-#else
-#define GETJSAMPLE(value)  ((int) (value) & 0xFF)
-#endif /* CHAR_IS_UNSIGNED */
-
-#endif /* HAVE_UNSIGNED_CHAR */
-
-#define MAXJSAMPLE	255
-#define CENTERJSAMPLE	128
-
-#endif /* BITS_IN_JSAMPLE == 8 */
-
-
-#if BITS_IN_JSAMPLE == 12
-/* JSAMPLE should be the smallest type that will hold the values 0..4095.
- * On nearly all machines "short" will do nicely.
- */
-
-typedef short JSAMPLE;
-#define GETJSAMPLE(value)  ((int) (value))
-
-#define MAXJSAMPLE	4095
-#define CENTERJSAMPLE	2048
-
-#endif /* BITS_IN_JSAMPLE == 12 */
-
-
-/* Representation of a DCT frequency coefficient.
- * This should be a signed value of at least 16 bits; "short" is usually OK.
- * Again, we allocate large arrays of these, but you can change to int
- * if you have memory to burn and "short" is really slow.
- */
-
-typedef short JCOEF;
-
-
-/* Compressed datastreams are represented as arrays of JOCTET.
- * These must be EXACTLY 8 bits wide, at least once they are written to
- * external storage.  Note that when using the stdio data source/destination
- * managers, this is also the data type passed to fread/fwrite.
- */
-
-#ifdef HAVE_UNSIGNED_CHAR
-
-typedef unsigned char JOCTET;
-#define GETJOCTET(value)  (value)
-
-#else /* not HAVE_UNSIGNED_CHAR */
-
-typedef char JOCTET;
-#ifdef CHAR_IS_UNSIGNED
-#define GETJOCTET(value)  (value)
-#else
-#define GETJOCTET(value)  ((value) & 0xFF)
-#endif /* CHAR_IS_UNSIGNED */
-
-#endif /* HAVE_UNSIGNED_CHAR */
-
-
-/* These typedefs are used for various table entries and so forth.
- * They must be at least as wide as specified; but making them too big
- * won't cost a huge amount of memory, so we don't provide special
- * extraction code like we did for JSAMPLE.  (In other words, these
- * typedefs live at a different point on the speed/space tradeoff curve.)
- */
-
-/* UINT8 must hold at least the values 0..255. */
-
-#ifdef HAVE_UNSIGNED_CHAR
-typedef unsigned char UINT8;
-#else /* not HAVE_UNSIGNED_CHAR */
-#ifdef CHAR_IS_UNSIGNED
-typedef char UINT8;
-#else /* not CHAR_IS_UNSIGNED */
-typedef short UINT8;
-#endif /* CHAR_IS_UNSIGNED */
-#endif /* HAVE_UNSIGNED_CHAR */
-
-/* UINT16 must hold at least the values 0..65535. */
-
-#ifdef HAVE_UNSIGNED_SHORT
-typedef unsigned short UINT16;
-#else /* not HAVE_UNSIGNED_SHORT */
-typedef unsigned int UINT16;
-#endif /* HAVE_UNSIGNED_SHORT */
-
-/* INT16 must hold at least the values -32768..32767. */
-
-#ifndef XMD_H			/* X11/xmd.h correctly defines INT16 */
-typedef short INT16;
-#endif
-
-/* INT32 must hold at least signed 32-bit values. */
-
-#ifndef XMD_H			/* X11/xmd.h correctly defines INT32 */
-typedef long INT32;
-#endif
-
-/* Datatype used for image dimensions.  The JPEG standard only supports
- * images up to 64K*64K due to 16-bit fields in SOF markers.  Therefore
- * "unsigned int" is sufficient on all machines.  However, if you need to
- * handle larger images and you don't mind deviating from the spec, you
- * can change this datatype.
- */
-
-typedef unsigned int JDIMENSION;
-
-#define JPEG_MAX_DIMENSION  65500L  /* a tad under 64K to prevent overflows */
-
-
-/* These macros are used in all function definitions and extern declarations.
- * You could modify them if you need to change function linkage conventions;
- * in particular, you'll need to do that to make the library a Windows DLL.
- * Another application is to make all functions global for use with debuggers
- * or code profilers that require it.
- */
-
-/* a function called through method pointers: */
-#define METHODDEF(type)		static type
-/* a function used only in its module: */
-#define LOCAL(type)		static type
-/* a function referenced thru EXTERNs: */
-#define GLOBAL(type)		type
-/* a reference to a GLOBAL function: */
-#define EXTERN(type)		extern type
-
-
-/* This macro is used to declare a "method", that is, a function pointer.
- * We want to supply prototype parameters if the compiler can cope.
- * Note that the arglist parameter must be parenthesized!
- * Again, you can customize this if you need special linkage keywords.
- */
-
-#ifdef HAVE_PROTOTYPES
-#define JMETHOD(type,methodname,arglist)  type (*methodname) arglist
-#else
-#define JMETHOD(type,methodname,arglist)  type (*methodname) ()
-#endif
-
-
-/* Here is the pseudo-keyword for declaring pointers that must be "far"
- * on 80x86 machines.  Most of the specialized coding for 80x86 is handled
- * by just saying "FAR *" where such a pointer is needed.  In a few places
- * explicit coding is needed; see uses of the NEED_FAR_POINTERS symbol.
- */
-
-#ifdef NEED_FAR_POINTERS
-#define FAR  far
-#else
-#define FAR
-#endif
-
-
-/*
- * On a few systems, type boolean and/or its values FALSE, TRUE may appear
- * in standard header files.  Or you may have conflicts with application-
- * specific header files that you want to include together with these files.
- * Defining HAVE_BOOLEAN before including jpeglib.h should make it work.
- */
-
-#ifndef HAVE_BOOLEAN
-typedef int boolean;
-#endif
-#ifndef FALSE			/* in case these macros already exist */
-#define FALSE	0		/* values of boolean */
-#endif
-#ifndef TRUE
-#define TRUE	1
-#endif
-
-
-/*
- * The remaining options affect code selection within the JPEG library,
- * but they don't need to be visible to most applications using the library.
- * To minimize application namespace pollution, the symbols won't be
- * defined unless JPEG_INTERNALS or JPEG_INTERNAL_OPTIONS has been defined.
- */
-
-#ifdef JPEG_INTERNALS
-#define JPEG_INTERNAL_OPTIONS
-#endif
-
-#ifdef JPEG_INTERNAL_OPTIONS
-
-
-/*
- * These defines indicate whether to include various optional functions.
- * Undefining some of these symbols will produce a smaller but less capable
- * library.  Note that you can leave certain source files out of the
- * compilation/linking process if you've #undef'd the corresponding symbols.
- * (You may HAVE to do that if your compiler doesn't like null source files.)
- */
-
-/* Arithmetic coding is unsupported for legal reasons.  Complaints to IBM. */
-
-/* Capability options common to encoder and decoder: */
-
-#define DCT_ISLOW_SUPPORTED	/* slow but accurate integer algorithm */
-#define DCT_IFAST_SUPPORTED	/* faster, less accurate integer method */
-#define DCT_FLOAT_SUPPORTED	/* floating-point: accurate, fast on fast HW */
-
-/* Encoder capability options: */
-
-#undef  C_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
-#define C_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
-#define C_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
-#define ENTROPY_OPT_SUPPORTED	    /* Optimization of entropy coding parms? */
-/* Note: if you selected 12-bit data precision, it is dangerous to turn off
- * ENTROPY_OPT_SUPPORTED.  The standard Huffman tables are only good for 8-bit
- * precision, so jchuff.c normally uses entropy optimization to compute
- * usable tables for higher precision.  If you don't want to do optimization,
- * you'll have to supply different default Huffman tables.
- * The exact same statements apply for progressive JPEG: the default tables
- * don't work for progressive mode.  (This may get fixed, however.)
- */
-#define INPUT_SMOOTHING_SUPPORTED   /* Input image smoothing option? */
-
-/* Decoder capability options: */
-
-#undef  D_ARITH_CODING_SUPPORTED    /* Arithmetic coding back end? */
-#define D_MULTISCAN_FILES_SUPPORTED /* Multiple-scan JPEG files? */
-#define D_PROGRESSIVE_SUPPORTED	    /* Progressive JPEG? (Requires MULTISCAN)*/
-#define BLOCK_SMOOTHING_SUPPORTED   /* Block smoothing? (Progressive only) */
-#define IDCT_SCALING_SUPPORTED	    /* Output rescaling via IDCT? */
-#undef  UPSAMPLE_SCALING_SUPPORTED  /* Output rescaling at upsample stage? */
-#define UPSAMPLE_MERGING_SUPPORTED  /* Fast path for sloppy upsampling? */
-#define QUANT_1PASS_SUPPORTED	    /* 1-pass color quantization? */
-#define QUANT_2PASS_SUPPORTED	    /* 2-pass color quantization? */
-
-/* more capability options later, no doubt */
-
-
-/*
- * Ordering of RGB data in scanlines passed to or from the application.
- * If your application wants to deal with data in the order B,G,R, just
- * change these macros.  You can also deal with formats such as R,G,B,X
- * (one extra byte per pixel) by changing RGB_PIXELSIZE.  Note that changing
- * the offsets will also change the order in which colormap data is organized.
- * RESTRICTIONS:
- * 1. The sample applications cjpeg,djpeg do NOT support modified RGB formats.
- * 2. These macros only affect RGB<=>YCbCr color conversion, so they are not
- *    useful if you are using JPEG color spaces other than YCbCr or grayscale.
- * 3. The color quantizer modules will not behave desirably if RGB_PIXELSIZE
- *    is not 3 (they don't understand about dummy color components!).  So you
- *    can't use color quantization if you change that value.
- */
-
-#define RGB_RED		0	/* Offset of Red in an RGB scanline element */
-#define RGB_GREEN	1	/* Offset of Green */
-#define RGB_BLUE	2	/* Offset of Blue */
-#define RGB_PIXELSIZE	3	/* JSAMPLEs per RGB scanline element */
-
-
-/* Definitions for speed-related optimizations. */
-
-
-/* If your compiler supports inline functions, define INLINE
- * as the inline keyword; otherwise define it as empty.
- */
-
-#ifndef INLINE
-#ifdef __GNUC__			/* for instance, GNU C knows about inline */
-#define INLINE __inline__
-#endif
-#ifndef INLINE
-#define INLINE			/* default is to define it as empty */
-#endif
-#endif
-
-
-/* On some machines (notably 68000 series) "int" is 32 bits, but multiplying
- * two 16-bit shorts is faster than multiplying two ints.  Define MULTIPLIER
- * as short on such a machine.  MULTIPLIER must be at least 16 bits wide.
- */
-
-#ifndef MULTIPLIER
-#define MULTIPLIER  int		/* type for fastest integer multiply */
-#endif
-
-
-/* FAST_FLOAT should be either float or double, whichever is done faster
- * by your compiler.  (Note that this type is only used in the floating point
- * DCT routines, so it only matters if you've defined DCT_FLOAT_SUPPORTED.)
- * Typically, float is faster in ANSI C compilers, while double is faster in
- * pre-ANSI compilers (because they insist on converting to double anyway).
- * The code below therefore chooses float if we have ANSI-style prototypes.
- */
-
-#ifndef FAST_FLOAT
-#ifdef HAVE_PROTOTYPES
-#define FAST_FLOAT  float
-#else
-#define FAST_FLOAT  double
-#endif
-#endif
-
-#endif /* JPEG_INTERNAL_OPTIONS */

cde/lib/DtHelp/jpeg/jpegint.h

@@ -1,411 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jpegint.h /main/2 1996/05/09 03:53:25 drk $ */
-/*
- * jpegint.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file provides common declarations for the various JPEG modules.
- * These declarations are considered internal to the JPEG library; most
- * applications using the library shouldn't need to include this file.
- */
-
-
-/* Declarations for both compression & decompression */
-
-typedef enum {			/* Operating modes for buffer controllers */
-	JBUF_PASS_THRU,		/* Plain stripwise operation */
-	/* Remaining modes require a full-image buffer to have been created */
-	JBUF_SAVE_SOURCE,	/* Run source subobject only, save output */
-	JBUF_CRANK_DEST,	/* Run dest subobject only, using saved data */
-	JBUF_SAVE_AND_PASS	/* Run both subobjects, save output */
-} J_BUF_MODE;
-
-/* Values of global_state field (jdapi.c has some dependencies on ordering!) */
-#define CSTATE_START	100	/* after create_compress */
-#define CSTATE_SCANNING	101	/* start_compress done, write_scanlines OK */
-#define CSTATE_RAW_OK	102	/* start_compress done, write_raw_data OK */
-#define CSTATE_WRCOEFS	103	/* jpeg_write_coefficients done */
-#define DSTATE_START	200	/* after create_decompress */
-#define DSTATE_INHEADER	201	/* reading header markers, no SOS yet */
-#define DSTATE_READY	202	/* found SOS, ready for start_decompress */
-#define DSTATE_PRELOAD	203	/* reading multiscan file in start_decompress*/
-#define DSTATE_PRESCAN	204	/* performing dummy pass for 2-pass quant */
-#define DSTATE_SCANNING	205	/* start_decompress done, read_scanlines OK */
-#define DSTATE_RAW_OK	206	/* start_decompress done, read_raw_data OK */
-#define DSTATE_BUFIMAGE	207	/* expecting jpeg_start_output */
-#define DSTATE_BUFPOST	208	/* looking for SOS/EOI in jpeg_finish_output */
-#define DSTATE_RDCOEFS	209	/* reading file in jpeg_read_coefficients */
-#define DSTATE_STOPPING	210	/* looking for EOI in jpeg_finish_decompress */
-
-
-/* Declarations for compression modules */
-
-/* Master control module */
-struct jpeg_comp_master {
-  JMETHOD(void, prepare_for_pass, (j_compress_ptr cinfo));
-  JMETHOD(void, pass_startup, (j_compress_ptr cinfo));
-  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
-
-  /* State variables made visible to other modules */
-  boolean call_pass_startup;	/* True if pass_startup must be called */
-  boolean is_last_pass;		/* True during last pass */
-};
-
-/* Main buffer control (downsampled-data buffer) */
-struct jpeg_c_main_controller {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
-  JMETHOD(void, process_data, (j_compress_ptr cinfo,
-			       JSAMPARRAY input_buf, JDIMENSION *in_row_ctr,
-			       JDIMENSION in_rows_avail));
-};
-
-/* Compression preprocessing (downsampling input buffer control) */
-struct jpeg_c_prep_controller {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
-  JMETHOD(void, pre_process_data, (j_compress_ptr cinfo,
-				   JSAMPARRAY input_buf,
-				   JDIMENSION *in_row_ctr,
-				   JDIMENSION in_rows_avail,
-				   JSAMPIMAGE output_buf,
-				   JDIMENSION *out_row_group_ctr,
-				   JDIMENSION out_row_groups_avail));
-};
-
-/* Coefficient buffer control */
-struct jpeg_c_coef_controller {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo, J_BUF_MODE pass_mode));
-  JMETHOD(boolean, compress_data, (j_compress_ptr cinfo,
-				   JSAMPIMAGE input_buf));
-};
-
-/* Colorspace conversion */
-struct jpeg_color_converter {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
-  JMETHOD(void, color_convert, (j_compress_ptr cinfo,
-				JSAMPARRAY input_buf, JSAMPIMAGE output_buf,
-				JDIMENSION output_row, int num_rows));
-};
-
-/* Downsampling */
-struct jpeg_downsampler {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
-  JMETHOD(void, downsample, (j_compress_ptr cinfo,
-			     JSAMPIMAGE input_buf, JDIMENSION in_row_index,
-			     JSAMPIMAGE output_buf,
-			     JDIMENSION out_row_group_index));
-
-  boolean need_context_rows;	/* TRUE if need rows above & below */
-};
-
-/* Forward DCT (also controls coefficient quantization) */
-struct jpeg_forward_dct {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo));
-  /* perhaps this should be an array??? */
-  JMETHOD(void, forward_DCT, (j_compress_ptr cinfo,
-			      jpeg_component_info * compptr,
-			      JSAMPARRAY sample_data, JBLOCKROW coef_blocks,
-			      JDIMENSION start_row, JDIMENSION start_col,
-			      JDIMENSION num_blocks));
-};
-
-/* Entropy encoding */
-struct jpeg_entropy_encoder {
-  JMETHOD(void, start_pass, (j_compress_ptr cinfo, boolean gather_statistics));
-  JMETHOD(boolean, encode_mcu, (j_compress_ptr cinfo, JBLOCKROW *MCU_data));
-  JMETHOD(void, finish_pass, (j_compress_ptr cinfo));
-};
-
-/* Marker writing */
-struct jpeg_marker_writer {
-  /* write_any_marker is exported for use by applications */
-  /* Probably only COM and APPn markers should be written */
-  JMETHOD(void, write_any_marker, (j_compress_ptr cinfo, int marker,
-				   const JOCTET *dataptr, unsigned int datalen));
-  JMETHOD(void, write_file_header, (j_compress_ptr cinfo));
-  JMETHOD(void, write_frame_header, (j_compress_ptr cinfo));
-  JMETHOD(void, write_scan_header, (j_compress_ptr cinfo));
-  JMETHOD(void, write_file_trailer, (j_compress_ptr cinfo));
-  JMETHOD(void, write_tables_only, (j_compress_ptr cinfo));
-};
-
-
-/* Declarations for decompression modules */
-
-/* Master control module */
-struct jpeg_decomp_master {
-  JMETHOD(void, prepare_for_output_pass, (j_decompress_ptr cinfo));
-  JMETHOD(void, finish_output_pass, (j_decompress_ptr cinfo));
-
-  /* State variables made visible to other modules */
-  boolean is_dummy_pass;	/* True during 1st pass for 2-pass quant */
-};
-
-/* Input control module */
-struct jpeg_input_controller {
-  JMETHOD(int, consume_input, (j_decompress_ptr cinfo));
-  JMETHOD(void, reset_input_controller, (j_decompress_ptr cinfo));
-  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
-  JMETHOD(void, finish_input_pass, (j_decompress_ptr cinfo));
-
-  /* State variables made visible to other modules */
-  boolean has_multiple_scans;	/* True if file has multiple scans */
-  boolean eoi_reached;		/* True when EOI has been consumed */
-};
-
-/* Main buffer control (downsampled-data buffer) */
-struct jpeg_d_main_controller {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
-  JMETHOD(void, process_data, (j_decompress_ptr cinfo,
-			       JSAMPARRAY output_buf, JDIMENSION *out_row_ctr,
-			       JDIMENSION out_rows_avail));
-};
-
-/* Coefficient buffer control */
-struct jpeg_d_coef_controller {
-  JMETHOD(void, start_input_pass, (j_decompress_ptr cinfo));
-  JMETHOD(int, consume_data, (j_decompress_ptr cinfo));
-  JMETHOD(void, start_output_pass, (j_decompress_ptr cinfo));
-  JMETHOD(int, decompress_data, (j_decompress_ptr cinfo,
-				 JSAMPIMAGE output_buf));
-  /* Pointer to array of coefficient virtual arrays, or NULL if none */
-  jvirt_barray_ptr *coef_arrays;
-};
-
-/* Decompression postprocessing (color quantization buffer control) */
-struct jpeg_d_post_controller {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, J_BUF_MODE pass_mode));
-  JMETHOD(void, post_process_data, (j_decompress_ptr cinfo,
-				    JSAMPIMAGE input_buf,
-				    JDIMENSION *in_row_group_ctr,
-				    JDIMENSION in_row_groups_avail,
-				    JSAMPARRAY output_buf,
-				    JDIMENSION *out_row_ctr,
-				    JDIMENSION out_rows_avail));
-};
-
-/* Marker reading & parsing */
-struct jpeg_marker_reader {
-  JMETHOD(void, reset_marker_reader, (j_decompress_ptr cinfo));
-  /* Read markers until SOS or EOI.
-   * Returns same codes as are defined for jpeg_consume_input:
-   * JPEG_SUSPENDED, JPEG_REACHED_SOS, or JPEG_REACHED_EOI.
-   */
-  JMETHOD(int, read_markers, (j_decompress_ptr cinfo));
-  /* Read a restart marker --- exported for use by entropy decoder only */
-  jpeg_marker_parser_method read_restart_marker;
-  /* Application-overridable marker processing methods */
-  jpeg_marker_parser_method process_COM;
-  jpeg_marker_parser_method process_APPn[16];
-
-  /* State of marker reader --- nominally internal, but applications
-   * supplying COM or APPn handlers might like to know the state.
-   */
-  boolean saw_SOI;		/* found SOI? */
-  boolean saw_SOF;		/* found SOF? */
-  int next_restart_num;		/* next restart number expected (0-7) */
-  unsigned int discarded_bytes;	/* # of bytes skipped looking for a marker */
-};
-
-/* Entropy decoding */
-struct jpeg_entropy_decoder {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
-  JMETHOD(boolean, decode_mcu, (j_decompress_ptr cinfo,
-				JBLOCKROW *MCU_data));
-};
-
-/* Inverse DCT (also performs dequantization) */
-typedef JMETHOD(void, inverse_DCT_method_ptr,
-		(j_decompress_ptr cinfo, jpeg_component_info * compptr,
-		 JCOEFPTR coef_block,
-		 JSAMPARRAY output_buf, JDIMENSION output_col));
-
-struct jpeg_inverse_dct {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
-  /* It is useful to allow each component to have a separate IDCT method. */
-  inverse_DCT_method_ptr inverse_DCT[MAX_COMPONENTS];
-};
-
-/* Upsampling (note that upsampler must also call color converter) */
-struct jpeg_upsampler {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
-  JMETHOD(void, upsample, (j_decompress_ptr cinfo,
-			   JSAMPIMAGE input_buf,
-			   JDIMENSION *in_row_group_ctr,
-			   JDIMENSION in_row_groups_avail,
-			   JSAMPARRAY output_buf,
-			   JDIMENSION *out_row_ctr,
-			   JDIMENSION out_rows_avail));
-
-  boolean need_context_rows;	/* TRUE if need rows above & below */
-};
-
-/* Colorspace conversion */
-struct jpeg_color_deconverter {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo));
-  JMETHOD(void, color_convert, (j_decompress_ptr cinfo,
-				JSAMPIMAGE input_buf, JDIMENSION input_row,
-				JSAMPARRAY output_buf, int num_rows));
-};
-
-/* Color quantization or color precision reduction */
-struct jpeg_color_quantizer {
-  JMETHOD(void, start_pass, (j_decompress_ptr cinfo, boolean is_pre_scan));
-  JMETHOD(void, color_quantize, (j_decompress_ptr cinfo,
-				 JSAMPARRAY input_buf, JSAMPARRAY output_buf,
-				 int num_rows));
-  JMETHOD(void, finish_pass, (j_decompress_ptr cinfo));
-  JMETHOD(void, new_color_map, (j_decompress_ptr cinfo));
-};
-
-
-/* Miscellaneous useful macros */
-
-#undef MAX
-#define MAX(a,b)	((a) > (b) ? (a) : (b))
-#undef MIN
-#define MIN(a,b)	((a) < (b) ? (a) : (b))
-
-
-/* We assume that right shift corresponds to signed division by 2 with
- * rounding towards minus infinity.  This is correct for typical "arithmetic
- * shift" instructions that shift in copies of the sign bit.  But some
- * C compilers implement >> with an unsigned shift.  For these machines you
- * must define RIGHT_SHIFT_IS_UNSIGNED.
- * RIGHT_SHIFT provides a proper signed right shift of an INT32 quantity.
- * It is only applied with constant shift counts.  SHIFT_TEMPS must be
- * included in the variables of any routine using RIGHT_SHIFT.
- */
-
-#ifdef RIGHT_SHIFT_IS_UNSIGNED
-#define SHIFT_TEMPS	INT32 shift_temp;
-#define RIGHT_SHIFT(x,shft)  \
-	((shift_temp = (x)) < 0 ? \
-	 (shift_temp >> (shft)) | ((~((INT32) 0)) << (32-(shft))) : \
-	 (shift_temp >> (shft)))
-#else
-#define SHIFT_TEMPS
-#define RIGHT_SHIFT(x,shft)	((x) >> (shft))
-#endif
-
-
-/* Short forms of external names for systems with brain-damaged linkers. */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jinit_compress_master	jICompress
-#define jinit_c_master_control	jICMaster
-#define jinit_c_main_controller	jICMainC
-#define jinit_c_prep_controller	jICPrepC
-#define jinit_c_coef_controller	jICCoefC
-#define jinit_color_converter	jICColor
-#define jinit_downsampler	jIDownsampler
-#define jinit_forward_dct	jIFDCT
-#define jinit_huff_encoder	jIHEncoder
-#define jinit_phuff_encoder	jIPHEncoder
-#define jinit_marker_writer	jIMWriter
-#define jinit_master_decompress	jIDMaster
-#define jinit_d_main_controller	jIDMainC
-#define jinit_d_coef_controller	jIDCoefC
-#define jinit_d_post_controller	jIDPostC
-#define jinit_input_controller	jIInCtlr
-#define jinit_marker_reader	jIMReader
-#define jinit_huff_decoder	jIHDecoder
-#define jinit_phuff_decoder	jIPHDecoder
-#define jinit_inverse_dct	jIIDCT
-#define jinit_upsampler		jIUpsampler
-#define jinit_color_deconverter	jIDColor
-#define jinit_1pass_quantizer	jI1Quant
-#define jinit_2pass_quantizer	jI2Quant
-#define jinit_merged_upsampler	jIMUpsampler
-#define jinit_memory_mgr	jIMemMgr
-#define jdiv_round_up		jDivRound
-#define jround_up		jRound
-#define jcopy_sample_rows	jCopySamples
-#define jcopy_block_row		jCopyBlocks
-#define jzero_far		jZeroFar
-#define jpeg_zigzag_order	jZIGTable
-#define jpeg_natural_order	jZAGTable
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/* Compression module initialization routines */
-EXTERN(void) jinit_compress_master JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_c_master_control JPP((j_compress_ptr cinfo,
-					 boolean transcode_only));
-EXTERN(void) jinit_c_main_controller JPP((j_compress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_c_prep_controller JPP((j_compress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_c_coef_controller JPP((j_compress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_color_converter JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_downsampler JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_forward_dct JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_huff_encoder JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_phuff_encoder JPP((j_compress_ptr cinfo));
-EXTERN(void) jinit_marker_writer JPP((j_compress_ptr cinfo));
-/* Decompression module initialization routines */
-EXTERN(void) jinit_master_decompress JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_d_main_controller JPP((j_decompress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_d_coef_controller JPP((j_decompress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_d_post_controller JPP((j_decompress_ptr cinfo,
-					  boolean need_full_buffer));
-EXTERN(void) jinit_input_controller JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_marker_reader JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_huff_decoder JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_phuff_decoder JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_inverse_dct JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_upsampler JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_color_deconverter JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_1pass_quantizer JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_2pass_quantizer JPP((j_decompress_ptr cinfo));
-EXTERN(void) jinit_merged_upsampler JPP((j_decompress_ptr cinfo));
-/* Memory manager initialization */
-EXTERN(void) jinit_memory_mgr JPP((j_common_ptr cinfo));
-
-/* Utility routines in jutils.c */
-EXTERN(long) jdiv_round_up JPP((long a, long b));
-EXTERN(long) jround_up JPP((long a, long b));
-EXTERN(void) jcopy_sample_rows JPP((JSAMPARRAY input_array, int source_row,
-				    JSAMPARRAY output_array, int dest_row,
-				    int num_rows, JDIMENSION num_cols));
-EXTERN(void) jcopy_block_row JPP((JBLOCKROW input_row, JBLOCKROW output_row,
-				  JDIMENSION num_blocks));
-EXTERN(void) jzero_far JPP((void FAR * target, size_t bytestozero));
-/* Constant tables in jutils.c */
-extern const int jpeg_zigzag_order[]; /* natural coef order to zigzag order */
-extern const int jpeg_natural_order[]; /* zigzag coef order to natural order */
-
-/* Suppress undefined-structure complaints if necessary. */
-
-#ifdef INCOMPLETE_TYPES_BROKEN
-#ifndef AM_MEMORY_MANAGER	/* only jmemmgr.c defines these */
-struct jvirt_sarray_control { long dummy; };
-struct jvirt_barray_control { long dummy; };
-#endif
-#endif /* INCOMPLETE_TYPES_BROKEN */

cde/lib/DtHelp/jpeg/jpeglib.h

@@ -1,1078 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jpeglib.h /main/2 1996/05/09 03:53:41 drk $ */
-/*
- * jpeglib.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file defines the application interface for the JPEG library.
- * Most applications using the library need only include this file,
- * and perhaps jerror.h if they want to know the exact error codes.
- */
-
-#ifndef JPEGLIB_H
-#define JPEGLIB_H
-
-/*
- * First we include the configuration files that record how this
- * installation of the JPEG library is set up.  jconfig.h can be
- * generated automatically for many systems.  jmorecfg.h contains
- * manual configuration options that most people need not worry about.
- */
-
-#ifndef JCONFIG_INCLUDED	/* in case jinclude.h already did */
-#include "jconfig.h"		/* widely used configuration options */
-#endif
-#include "jmorecfg.h"		/* seldom changed options */
-
-
-/* Version ID for the JPEG library.
- * Might be useful for tests like "#if JPEG_LIB_VERSION >= 60".
- */
-
-#define JPEG_LIB_VERSION  61	/* Version 6a */
-
-
-/* Various constants determining the sizes of things.
- * All of these are specified by the JPEG standard, so don't change them
- * if you want to be compatible.
- */
-
-#define DCTSIZE		    8	/* The basic DCT block is 8x8 samples */
-#define DCTSIZE2	    64	/* DCTSIZE squared; # of elements in a block */
-#define NUM_QUANT_TBLS      4	/* Quantization tables are numbered 0..3 */
-#define NUM_HUFF_TBLS       4	/* Huffman tables are numbered 0..3 */
-#define NUM_ARITH_TBLS      16	/* Arith-coding tables are numbered 0..15 */
-#define MAX_COMPS_IN_SCAN   4	/* JPEG limit on # of components in one scan */
-#define MAX_SAMP_FACTOR     4	/* JPEG limit on sampling factors */
-/* Unfortunately, some bozo at Adobe saw no reason to be bound by the standard;
- * the PostScript DCT filter can emit files with many more than 10 blocks/MCU.
- * If you happen to run across such a file, you can up D_MAX_BLOCKS_IN_MCU
- * to handle it.  We even let you do this from the jconfig.h file.  However,
- * we strongly discourage changing C_MAX_BLOCKS_IN_MCU; just because Adobe
- * sometimes emits noncompliant files doesn't mean you should too.
- */
-#define C_MAX_BLOCKS_IN_MCU   10 /* compressor's limit on blocks per MCU */
-#ifndef D_MAX_BLOCKS_IN_MCU
-#define D_MAX_BLOCKS_IN_MCU   10 /* decompressor's limit on blocks per MCU */
-#endif
-
-
-/* Data structures for images (arrays of samples and of DCT coefficients).
- * On 80x86 machines, the image arrays are too big for near pointers,
- * but the pointer arrays can fit in near memory.
- */
-
-typedef JSAMPLE FAR *JSAMPROW;	/* ptr to one image row of pixel samples. */
-typedef JSAMPROW *JSAMPARRAY;	/* ptr to some rows (a 2-D sample array) */
-typedef JSAMPARRAY *JSAMPIMAGE;	/* a 3-D sample array: top index is color */
-
-typedef JCOEF JBLOCK[DCTSIZE2];	/* one block of coefficients */
-typedef JBLOCK FAR *JBLOCKROW;	/* pointer to one row of coefficient blocks */
-typedef JBLOCKROW *JBLOCKARRAY;		/* a 2-D array of coefficient blocks */
-typedef JBLOCKARRAY *JBLOCKIMAGE;	/* a 3-D array of coefficient blocks */
-
-typedef JCOEF FAR *JCOEFPTR;	/* useful in a couple of places */
-
-
-/* Types for JPEG compression parameters and working tables. */
-
-
-/* DCT coefficient quantization tables. */
-
-typedef struct {
-  /* This array gives the coefficient quantizers in natural array order
-   * (not the zigzag order in which they are stored in a JPEG DQT marker).
-   * CAUTION: IJG versions prior to v6a kept this array in zigzag order.
-   */
-  UINT16 quantval[DCTSIZE2];	/* quantization step for each coefficient */
-  /* This field is used only during compression.  It's initialized FALSE when
-   * the table is created, and set TRUE when it's been output to the file.
-   * You could suppress output of a table by setting this to TRUE.
-   * (See jpeg_suppress_tables for an example.)
-   */
-  boolean sent_table;		/* TRUE when table has been output */
-} JQUANT_TBL;
-
-
-/* Huffman coding tables. */
-
-typedef struct {
-  /* These two fields directly represent the contents of a JPEG DHT marker */
-  UINT8 bits[17];		/* bits[k] = # of symbols with codes of */
-				/* length k bits; bits[0] is unused */
-  UINT8 huffval[256];		/* The symbols, in order of incr code length */
-  /* This field is used only during compression.  It's initialized FALSE when
-   * the table is created, and set TRUE when it's been output to the file.
-   * You could suppress output of a table by setting this to TRUE.
-   * (See jpeg_suppress_tables for an example.)
-   */
-  boolean sent_table;		/* TRUE when table has been output */
-} JHUFF_TBL;
-
-
-/* Basic info about one component (color channel). */
-
-typedef struct {
-  /* These values are fixed over the whole image. */
-  /* For compression, they must be supplied by parameter setup; */
-  /* for decompression, they are read from the SOF marker. */
-  int component_id;		/* identifier for this component (0..255) */
-  int component_index;		/* its index in SOF or cinfo->comp_info[] */
-  int h_samp_factor;		/* horizontal sampling factor (1..4) */
-  int v_samp_factor;		/* vertical sampling factor (1..4) */
-  int quant_tbl_no;		/* quantization table selector (0..3) */
-  /* These values may vary between scans. */
-  /* For compression, they must be supplied by parameter setup; */
-  /* for decompression, they are read from the SOS marker. */
-  /* The decompressor output side may not use these variables. */
-  int dc_tbl_no;		/* DC entropy table selector (0..3) */
-  int ac_tbl_no;		/* AC entropy table selector (0..3) */
-  
-  /* Remaining fields should be treated as private by applications. */
-  
-  /* These values are computed during compression or decompression startup: */
-  /* Component's size in DCT blocks.
-   * Any dummy blocks added to complete an MCU are not counted; therefore
-   * these values do not depend on whether a scan is interleaved or not.
-   */
-  JDIMENSION width_in_blocks;
-  JDIMENSION height_in_blocks;
-  /* Size of a DCT block in samples.  Always DCTSIZE for compression.
-   * For decompression this is the size of the output from one DCT block,
-   * reflecting any scaling we choose to apply during the IDCT step.
-   * Values of 1,2,4,8 are likely to be supported.  Note that different
-   * components may receive different IDCT scalings.
-   */
-  int DCT_scaled_size;
-  /* The downsampled dimensions are the component's actual, unpadded number
-   * of samples at the main buffer (preprocessing/compression interface), thus
-   * downsampled_width = ceil(image_width * Hi/Hmax)
-   * and similarly for height.  For decompression, IDCT scaling is included, so
-   * downsampled_width = ceil(image_width * Hi/Hmax * DCT_scaled_size/DCTSIZE)
-   */
-  JDIMENSION downsampled_width;	 /* actual width in samples */
-  JDIMENSION downsampled_height; /* actual height in samples */
-  /* This flag is used only for decompression.  In cases where some of the
-   * components will be ignored (eg grayscale output from YCbCr image),
-   * we can skip most computations for the unused components.
-   */
-  boolean component_needed;	/* do we need the value of this component? */
-
-  /* These values are computed before starting a scan of the component. */
-  /* The decompressor output side may not use these variables. */
-  int MCU_width;		/* number of blocks per MCU, horizontally */
-  int MCU_height;		/* number of blocks per MCU, vertically */
-  int MCU_blocks;		/* MCU_width * MCU_height */
-  int MCU_sample_width;		/* MCU width in samples, MCU_width*DCT_scaled_size */
-  int last_col_width;		/* # of non-dummy blocks across in last MCU */
-  int last_row_height;		/* # of non-dummy blocks down in last MCU */
-
-  /* Saved quantization table for component; NULL if none yet saved.
-   * See jdinput.c comments about the need for this information.
-   * This field is currently used only for decompression.
-   */
-  JQUANT_TBL * quant_table;
-
-  /* Private per-component storage for DCT or IDCT subsystem. */
-  void * dct_table;
-} jpeg_component_info;
-
-
-/* The script for encoding a multiple-scan file is an array of these: */
-
-typedef struct {
-  int comps_in_scan;		/* number of components encoded in this scan */
-  int component_index[MAX_COMPS_IN_SCAN]; /* their SOF/comp_info[] indexes */
-  int Ss, Se;			/* progressive JPEG spectral selection parms */
-  int Ah, Al;			/* progressive JPEG successive approx. parms */
-} jpeg_scan_info;
-
-
-/* Known color spaces. */
-
-typedef enum {
-	JCS_UNKNOWN,		/* error/unspecified */
-	JCS_GRAYSCALE,		/* monochrome */
-	JCS_RGB,		/* red/green/blue */
-	JCS_YCbCr,		/* Y/Cb/Cr (also known as YUV) */
-	JCS_CMYK,		/* C/M/Y/K */
-	JCS_YCCK		/* Y/Cb/Cr/K */
-} J_COLOR_SPACE;
-
-/* DCT/IDCT algorithm options. */
-
-typedef enum {
-	JDCT_ISLOW,		/* slow but accurate integer algorithm */
-	JDCT_IFAST,		/* faster, less accurate integer method */
-	JDCT_FLOAT		/* floating-point: accurate, fast on fast HW */
-} J_DCT_METHOD;
-
-#ifndef JDCT_DEFAULT		/* may be overridden in jconfig.h */
-#define JDCT_DEFAULT  JDCT_ISLOW
-#endif
-#ifndef JDCT_FASTEST		/* may be overridden in jconfig.h */
-#define JDCT_FASTEST  JDCT_IFAST
-#endif
-
-/* Dithering options for decompression. */
-
-typedef enum {
-	JDITHER_NONE,		/* no dithering */
-	JDITHER_ORDERED,	/* simple ordered dither */
-	JDITHER_FS		/* Floyd-Steinberg error diffusion dither */
-} J_DITHER_MODE;
-
-
-/* Common fields between JPEG compression and decompression master structs. */
-
-#define jpeg_common_fields \
-  struct jpeg_error_mgr * err;	/* Error handler module */\
-  struct jpeg_memory_mgr * mem;	/* Memory manager module */\
-  struct jpeg_progress_mgr * progress; /* Progress monitor, or NULL if none */\
-  boolean is_decompressor;	/* so common code can tell which is which */\
-  int global_state		/* for checking call sequence validity */
-
-/* Routines that are to be used by both halves of the library are declared
- * to receive a pointer to this structure.  There are no actual instances of
- * jpeg_common_struct, only of jpeg_compress_struct and jpeg_decompress_struct.
- */
-struct jpeg_common_struct {
-  jpeg_common_fields;		/* Fields common to both master struct types */
-  /* Additional fields follow in an actual jpeg_compress_struct or
-   * jpeg_decompress_struct.  All three structs must agree on these
-   * initial fields!  (This would be a lot cleaner in C++.)
-   */
-};
-
-typedef struct jpeg_common_struct * j_common_ptr;
-typedef struct jpeg_compress_struct * j_compress_ptr;
-typedef struct jpeg_decompress_struct * j_decompress_ptr;
-
-
-/* Master record for a compression instance */
-
-struct jpeg_compress_struct {
-  jpeg_common_fields;		/* Fields shared with jpeg_decompress_struct */
-
-  /* Destination for compressed data */
-  struct jpeg_destination_mgr * dest;
-
-  /* Description of source image --- these fields must be filled in by
-   * outer application before starting compression.  in_color_space must
-   * be correct before you can even call jpeg_set_defaults().
-   */
-
-  JDIMENSION image_width;	/* input image width */
-  JDIMENSION image_height;	/* input image height */
-  int input_components;		/* # of color components in input image */
-  J_COLOR_SPACE in_color_space;	/* colorspace of input image */
-
-  double input_gamma;		/* image gamma of input image */
-
-  /* Compression parameters --- these fields must be set before calling
-   * jpeg_start_compress().  We recommend calling jpeg_set_defaults() to
-   * initialize everything to reasonable defaults, then changing anything
-   * the application specifically wants to change.  That way you won't get
-   * burnt when new parameters are added.  Also note that there are several
-   * helper routines to simplify changing parameters.
-   */
-
-  int data_precision;		/* bits of precision in image data */
-
-  int num_components;		/* # of color components in JPEG image */
-  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
-
-  jpeg_component_info * comp_info;
-  /* comp_info[i] describes component that appears i'th in SOF */
-  
-  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
-  /* ptrs to coefficient quantization tables, or NULL if not defined */
-  
-  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  /* ptrs to Huffman coding tables, or NULL if not defined */
-  
-  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
-  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
-  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
-
-  int num_scans;		/* # of entries in scan_info array */
-  const jpeg_scan_info * scan_info; /* script for multi-scan file, or NULL */
-  /* The default value of scan_info is NULL, which causes a single-scan
-   * sequential JPEG file to be emitted.  To create a multi-scan file,
-   * set num_scans and scan_info to point to an array of scan definitions.
-   */
-
-  boolean raw_data_in;		/* TRUE=caller supplies downsampled data */
-  boolean arith_code;		/* TRUE=arithmetic coding, FALSE=Huffman */
-  boolean optimize_coding;	/* TRUE=optimize entropy encoding parms */
-  boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
-  int smoothing_factor;		/* 1..100, or 0 for no input smoothing */
-  J_DCT_METHOD dct_method;	/* DCT algorithm selector */
-
-  /* The restart interval can be specified in absolute MCUs by setting
-   * restart_interval, or in MCU rows by setting restart_in_rows
-   * (in which case the correct restart_interval will be figured
-   * for each scan).
-   */
-  unsigned int restart_interval; /* MCUs per restart, or 0 for no restart */
-  int restart_in_rows;		/* if > 0, MCU rows per restart interval */
-
-  /* Parameters controlling emission of special markers. */
-
-  boolean write_JFIF_header;	/* should a JFIF marker be written? */
-  /* These three values are not used by the JPEG code, merely copied */
-  /* into the JFIF APP0 marker.  density_unit can be 0 for unknown, */
-  /* 1 for dots/inch, or 2 for dots/cm.  Note that the pixel aspect */
-  /* ratio is defined by X_density/Y_density even when density_unit=0. */
-  UINT8 density_unit;		/* JFIF code for pixel size units */
-  UINT16 X_density;		/* Horizontal pixel density */
-  UINT16 Y_density;		/* Vertical pixel density */
-  boolean write_Adobe_marker;	/* should an Adobe marker be written? */
-  
-  /* State variable: index of next scanline to be written to
-   * jpeg_write_scanlines().  Application may use this to control its
-   * processing loop, e.g., "while (next_scanline < image_height)".
-   */
-
-  JDIMENSION next_scanline;	/* 0 .. image_height-1  */
-
-  /* Remaining fields are known throughout compressor, but generally
-   * should not be touched by a surrounding application.
-   */
-
-  /*
-   * These fields are computed during compression startup
-   */
-  boolean progressive_mode;	/* TRUE if scan script uses progressive mode */
-  int max_h_samp_factor;	/* largest h_samp_factor */
-  int max_v_samp_factor;	/* largest v_samp_factor */
-
-  JDIMENSION total_iMCU_rows;	/* # of iMCU rows to be input to coef ctlr */
-  /* The coefficient controller receives data in units of MCU rows as defined
-   * for fully interleaved scans (whether the JPEG file is interleaved or not).
-   * There are v_samp_factor * DCTSIZE sample rows of each component in an
-   * "iMCU" (interleaved MCU) row.
-   */
-  
-  /*
-   * These fields are valid during any one scan.
-   * They describe the components and MCUs actually appearing in the scan.
-   */
-  int comps_in_scan;		/* # of JPEG components in this scan */
-  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
-  /* *cur_comp_info[i] describes component that appears i'th in SOS */
-  
-  JDIMENSION MCUs_per_row;	/* # of MCUs across the image */
-  JDIMENSION MCU_rows_in_scan;	/* # of MCU rows in the image */
-  
-  int blocks_in_MCU;		/* # of DCT blocks per MCU */
-  int MCU_membership[C_MAX_BLOCKS_IN_MCU];
-  /* MCU_membership[i] is index in cur_comp_info of component owning */
-  /* i'th block in an MCU */
-
-  int Ss, Se, Ah, Al;		/* progressive JPEG parameters for scan */
-
-  /*
-   * Links to compression subobjects (methods and private variables of modules)
-   */
-  struct jpeg_comp_master * master;
-  struct jpeg_c_main_controller * main;
-  struct jpeg_c_prep_controller * prep;
-  struct jpeg_c_coef_controller * coef;
-  struct jpeg_marker_writer * marker;
-  struct jpeg_color_converter * cconvert;
-  struct jpeg_downsampler * downsample;
-  struct jpeg_forward_dct * fdct;
-  struct jpeg_entropy_encoder * entropy;
-};
-
-
-/* Master record for a decompression instance */
-
-struct jpeg_decompress_struct {
-  jpeg_common_fields;		/* Fields shared with jpeg_compress_struct */
-
-  /* Source of compressed data */
-  struct jpeg_source_mgr * src;
-
-  /* Basic description of image --- filled in by jpeg_read_header(). */
-  /* Application may inspect these values to decide how to process image. */
-
-  JDIMENSION image_width;	/* nominal image width (from SOF marker) */
-  JDIMENSION image_height;	/* nominal image height */
-  int num_components;		/* # of color components in JPEG image */
-  J_COLOR_SPACE jpeg_color_space; /* colorspace of JPEG image */
-
-  /* Decompression processing parameters --- these fields must be set before
-   * calling jpeg_start_decompress().  Note that jpeg_read_header() initializes
-   * them to default values.
-   */
-
-  J_COLOR_SPACE out_color_space; /* colorspace for output */
-
-  unsigned int scale_num, scale_denom; /* fraction by which to scale image */
-
-  double output_gamma;		/* image gamma wanted in output */
-
-  boolean buffered_image;	/* TRUE=multiple output passes */
-  boolean raw_data_out;		/* TRUE=downsampled data wanted */
-
-  J_DCT_METHOD dct_method;	/* IDCT algorithm selector */
-  boolean do_fancy_upsampling;	/* TRUE=apply fancy upsampling */
-  boolean do_block_smoothing;	/* TRUE=apply interblock smoothing */
-
-  boolean quantize_colors;	/* TRUE=colormapped output wanted */
-  /* the following are ignored if not quantize_colors: */
-  J_DITHER_MODE dither_mode;	/* type of color dithering to use */
-  boolean two_pass_quantize;	/* TRUE=use two-pass color quantization */
-  int desired_number_of_colors;	/* max # colors to use in created colormap */
-  /* these are significant only in buffered-image mode: */
-  boolean enable_1pass_quant;	/* enable future use of 1-pass quantizer */
-  boolean enable_external_quant;/* enable future use of external colormap */
-  boolean enable_2pass_quant;	/* enable future use of 2-pass quantizer */
-
-  /* Description of actual output image that will be returned to application.
-   * These fields are computed by jpeg_start_decompress().
-   * You can also use jpeg_calc_output_dimensions() to determine these values
-   * in advance of calling jpeg_start_decompress().
-   */
-
-  JDIMENSION output_width;	/* scaled image width */
-  JDIMENSION output_height;	/* scaled image height */
-  int out_color_components;	/* # of color components in out_color_space */
-  int output_components;	/* # of color components returned */
-  /* output_components is 1 (a colormap index) when quantizing colors;
-   * otherwise it equals out_color_components.
-   */
-  int rec_outbuf_height;	/* min recommended height of scanline buffer */
-  /* If the buffer passed to jpeg_read_scanlines() is less than this many rows
-   * high, space and time will be wasted due to unnecessary data copying.
-   * Usually rec_outbuf_height will be 1 or 2, at most 4.
-   */
-
-  /* When quantizing colors, the output colormap is described by these fields.
-   * The application can supply a colormap by setting colormap non-NULL before
-   * calling jpeg_start_decompress; otherwise a colormap is created during
-   * jpeg_start_decompress or jpeg_start_output.
-   * The map has out_color_components rows and actual_number_of_colors columns.
-   */
-  int actual_number_of_colors;	/* number of entries in use */
-  JSAMPARRAY colormap;		/* The color map as a 2-D pixel array */
-
-  /* State variables: these variables indicate the progress of decompression.
-   * The application may examine these but must not modify them.
-   */
-
-  /* Row index of next scanline to be read from jpeg_read_scanlines().
-   * Application may use this to control its processing loop, e.g.,
-   * "while (output_scanline < output_height)".
-   */
-  JDIMENSION output_scanline;	/* 0 .. output_height-1  */
-
-  /* Current input scan number and number of iMCU rows completed in scan.
-   * These indicate the progress of the decompressor input side.
-   */
-  int input_scan_number;	/* Number of SOS markers seen so far */
-  JDIMENSION input_iMCU_row;	/* Number of iMCU rows completed */
-
-  /* The "output scan number" is the notional scan being displayed by the
-   * output side.  The decompressor will not allow output scan/row number
-   * to get ahead of input scan/row, but it can fall arbitrarily far behind.
-   */
-  int output_scan_number;	/* Nominal scan number being displayed */
-  JDIMENSION output_iMCU_row;	/* Number of iMCU rows read */
-
-  /* Current progression status.  coef_bits[c][i] indicates the precision
-   * with which component c's DCT coefficient i (in zigzag order) is known.
-   * It is -1 when no data has yet been received, otherwise it is the point
-   * transform (shift) value for the most recent scan of the coefficient
-   * (thus, 0 at completion of the progression).
-   * This pointer is NULL when reading a non-progressive file.
-   */
-  int (*coef_bits)[DCTSIZE2];	/* -1 or current Al value for each coef */
-
-  /* Internal JPEG parameters --- the application usually need not look at
-   * these fields.  Note that the decompressor output side may not use
-   * any parameters that can change between scans.
-   */
-
-  /* Quantization and Huffman tables are carried forward across input
-   * datastreams when processing abbreviated JPEG datastreams.
-   */
-
-  JQUANT_TBL * quant_tbl_ptrs[NUM_QUANT_TBLS];
-  /* ptrs to coefficient quantization tables, or NULL if not defined */
-
-  JHUFF_TBL * dc_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  JHUFF_TBL * ac_huff_tbl_ptrs[NUM_HUFF_TBLS];
-  /* ptrs to Huffman coding tables, or NULL if not defined */
-
-  /* These parameters are never carried across datastreams, since they
-   * are given in SOF/SOS markers or defined to be reset by SOI.
-   */
-
-  int data_precision;		/* bits of precision in image data */
-
-  jpeg_component_info * comp_info;
-  /* comp_info[i] describes component that appears i'th in SOF */
-
-  boolean progressive_mode;	/* TRUE if SOFn specifies progressive mode */
-  boolean arith_code;		/* TRUE=arithmetic coding, FALSE=Huffman */
-
-  UINT8 arith_dc_L[NUM_ARITH_TBLS]; /* L values for DC arith-coding tables */
-  UINT8 arith_dc_U[NUM_ARITH_TBLS]; /* U values for DC arith-coding tables */
-  UINT8 arith_ac_K[NUM_ARITH_TBLS]; /* Kx values for AC arith-coding tables */
-
-  unsigned int restart_interval; /* MCUs per restart interval, or 0 for no restart */
-
-  /* These fields record data obtained from optional markers recognized by
-   * the JPEG library.
-   */
-  boolean saw_JFIF_marker;	/* TRUE iff a JFIF APP0 marker was found */
-  /* Data copied from JFIF marker: */
-  UINT8 density_unit;		/* JFIF code for pixel size units */
-  UINT16 X_density;		/* Horizontal pixel density */
-  UINT16 Y_density;		/* Vertical pixel density */
-  boolean saw_Adobe_marker;	/* TRUE iff an Adobe APP14 marker was found */
-  UINT8 Adobe_transform;	/* Color transform code from Adobe marker */
-
-  boolean CCIR601_sampling;	/* TRUE=first samples are cosited */
-
-  /* Remaining fields are known throughout decompressor, but generally
-   * should not be touched by a surrounding application.
-   */
-
-  /*
-   * These fields are computed during decompression startup
-   */
-  int max_h_samp_factor;	/* largest h_samp_factor */
-  int max_v_samp_factor;	/* largest v_samp_factor */
-
-  int min_DCT_scaled_size;	/* smallest DCT_scaled_size of any component */
-
-  JDIMENSION total_iMCU_rows;	/* # of iMCU rows in image */
-  /* The coefficient controller's input and output progress is measured in
-   * units of "iMCU" (interleaved MCU) rows.  These are the same as MCU rows
-   * in fully interleaved JPEG scans, but are used whether the scan is
-   * interleaved or not.  We define an iMCU row as v_samp_factor DCT block
-   * rows of each component.  Therefore, the IDCT output contains
-   * v_samp_factor*DCT_scaled_size sample rows of a component per iMCU row.
-   */
-
-  JSAMPLE * sample_range_limit; /* table for fast range-limiting */
-
-  /*
-   * These fields are valid during any one scan.
-   * They describe the components and MCUs actually appearing in the scan.
-   * Note that the decompressor output side must not use these fields.
-   */
-  int comps_in_scan;		/* # of JPEG components in this scan */
-  jpeg_component_info * cur_comp_info[MAX_COMPS_IN_SCAN];
-  /* *cur_comp_info[i] describes component that appears i'th in SOS */
-
-  JDIMENSION MCUs_per_row;	/* # of MCUs across the image */
-  JDIMENSION MCU_rows_in_scan;	/* # of MCU rows in the image */
-
-  int blocks_in_MCU;		/* # of DCT blocks per MCU */
-  int MCU_membership[D_MAX_BLOCKS_IN_MCU];
-  /* MCU_membership[i] is index in cur_comp_info of component owning */
-  /* i'th block in an MCU */
-
-  int Ss, Se, Ah, Al;		/* progressive JPEG parameters for scan */
-
-  /* This field is shared between entropy decoder and marker parser.
-   * It is either zero or the code of a JPEG marker that has been
-   * read from the data source, but has not yet been processed.
-   */
-  int unread_marker;
-
-  /*
-   * Links to decompression subobjects (methods, private variables of modules)
-   */
-  struct jpeg_decomp_master * master;
-  struct jpeg_d_main_controller * main;
-  struct jpeg_d_coef_controller * coef;
-  struct jpeg_d_post_controller * post;
-  struct jpeg_input_controller * inputctl;
-  struct jpeg_marker_reader * marker;
-  struct jpeg_entropy_decoder * entropy;
-  struct jpeg_inverse_dct * idct;
-  struct jpeg_upsampler * upsample;
-  struct jpeg_color_deconverter * cconvert;
-  struct jpeg_color_quantizer * cquantize;
-};
-
-
-/* "Object" declarations for JPEG modules that may be supplied or called
- * directly by the surrounding application.
- * As with all objects in the JPEG library, these structs only define the
- * publicly visible methods and state variables of a module.  Additional
- * private fields may exist after the public ones.
- */
-
-
-/* Error handler object */
-
-struct jpeg_error_mgr {
-  /* Error exit handler: does not return to caller */
-  JMETHOD(void, error_exit, (j_common_ptr cinfo));
-  /* Conditionally emit a trace or warning message */
-  JMETHOD(void, emit_message, (j_common_ptr cinfo, int msg_level));
-  /* Routine that actually outputs a trace or error message */
-  JMETHOD(void, output_message, (j_common_ptr cinfo));
-  /* Format a message string for the most recent JPEG error or message */
-  JMETHOD(void, format_message, (j_common_ptr cinfo, char * buffer));
-#define JMSG_LENGTH_MAX  200	/* recommended size of format_message buffer */
-  /* Reset error state variables at start of a new image */
-  JMETHOD(void, reset_error_mgr, (j_common_ptr cinfo));
-  
-  /* The message ID code and any parameters are saved here.
-   * A message can have one string parameter or up to 8 int parameters.
-   */
-  int msg_code;
-#define JMSG_STR_PARM_MAX  80
-  union {
-    int i[8];
-    char s[JMSG_STR_PARM_MAX];
-  } msg_parm;
-  
-  /* Standard state variables for error facility */
-  
-  int trace_level;		/* max msg_level that will be displayed */
-  
-  /* For recoverable corrupt-data errors, we emit a warning message,
-   * but keep going unless emit_message chooses to abort.  emit_message
-   * should count warnings in num_warnings.  The surrounding application
-   * can check for bad data by seeing if num_warnings is nonzero at the
-   * end of processing.
-   */
-  long num_warnings;		/* number of corrupt-data warnings */
-
-  /* These fields point to the table(s) of error message strings.
-   * An application can change the table pointer to switch to a different
-   * message list (typically, to change the language in which errors are
-   * reported).  Some applications may wish to add additional error codes
-   * that will be handled by the JPEG library error mechanism; the second
-   * table pointer is used for this purpose.
-   *
-   * First table includes all errors generated by JPEG library itself.
-   * Error code 0 is reserved for a "no such error string" message.
-   */
-  const char * const * jpeg_message_table; /* Library errors */
-  int last_jpeg_message;    /* Table contains strings 0..last_jpeg_message */
-  /* Second table can be added by application (see cjpeg/djpeg for example).
-   * It contains strings numbered first_addon_message..last_addon_message.
-   */
-  const char * const * addon_message_table; /* Non-library errors */
-  int first_addon_message;	/* code for first string in addon table */
-  int last_addon_message;	/* code for last string in addon table */
-};
-
-
-/* Progress monitor object */
-
-struct jpeg_progress_mgr {
-  JMETHOD(void, progress_monitor, (j_common_ptr cinfo));
-
-  long pass_counter;		/* work units completed in this pass */
-  long pass_limit;		/* total number of work units in this pass */
-  int completed_passes;		/* passes completed so far */
-  int total_passes;		/* total number of passes expected */
-};
-
-
-/* Data destination object for compression */
-
-struct jpeg_destination_mgr {
-  JOCTET * next_output_byte;	/* => next byte to write in buffer */
-  size_t free_in_buffer;	/* # of byte spaces remaining in buffer */
-
-  JMETHOD(void, init_destination, (j_compress_ptr cinfo));
-  JMETHOD(boolean, empty_output_buffer, (j_compress_ptr cinfo));
-  JMETHOD(void, term_destination, (j_compress_ptr cinfo));
-};
-
-
-/* Data source object for decompression */
-
-struct jpeg_source_mgr {
-  const JOCTET * next_input_byte; /* => next byte to read from buffer */
-  size_t bytes_in_buffer;	/* # of bytes remaining in buffer */
-
-  JMETHOD(void, init_source, (j_decompress_ptr cinfo));
-  JMETHOD(boolean, fill_input_buffer, (j_decompress_ptr cinfo));
-  JMETHOD(void, skip_input_data, (j_decompress_ptr cinfo, long num_bytes));
-  JMETHOD(boolean, resync_to_restart, (j_decompress_ptr cinfo, int desired));
-  JMETHOD(void, term_source, (j_decompress_ptr cinfo));
-};
-
-
-/* Memory manager object.
- * Allocates "small" objects (a few K total), "large" objects (tens of K),
- * and "really big" objects (virtual arrays with backing store if needed).
- * The memory manager does not allow individual objects to be freed; rather,
- * each created object is assigned to a pool, and whole pools can be freed
- * at once.  This is faster and more convenient than remembering exactly what
- * to free, especially where malloc()/free() are not too speedy.
- * NB: alloc routines never return NULL.  They exit to error_exit if not
- * successful.
- */
-
-#define JPOOL_PERMANENT	0	/* lasts until master record is destroyed */
-#define JPOOL_IMAGE	1	/* lasts until done with image/datastream */
-#define JPOOL_NUMPOOLS	2
-
-typedef struct jvirt_sarray_control * jvirt_sarray_ptr;
-typedef struct jvirt_barray_control * jvirt_barray_ptr;
-
-
-struct jpeg_memory_mgr {
-  /* Method pointers */
-  JMETHOD(void *, alloc_small, (j_common_ptr cinfo, int pool_id,
-				size_t sizeofobject));
-  JMETHOD(void FAR *, alloc_large, (j_common_ptr cinfo, int pool_id,
-				     size_t sizeofobject));
-  JMETHOD(JSAMPARRAY, alloc_sarray, (j_common_ptr cinfo, int pool_id,
-				     JDIMENSION samplesperrow,
-				     JDIMENSION numrows));
-  JMETHOD(JBLOCKARRAY, alloc_barray, (j_common_ptr cinfo, int pool_id,
-				      JDIMENSION blocksperrow,
-				      JDIMENSION numrows));
-  JMETHOD(jvirt_sarray_ptr, request_virt_sarray, (j_common_ptr cinfo,
-						  int pool_id,
-						  boolean pre_zero,
-						  JDIMENSION samplesperrow,
-						  JDIMENSION numrows,
-						  JDIMENSION maxaccess));
-  JMETHOD(jvirt_barray_ptr, request_virt_barray, (j_common_ptr cinfo,
-						  int pool_id,
-						  boolean pre_zero,
-						  JDIMENSION blocksperrow,
-						  JDIMENSION numrows,
-						  JDIMENSION maxaccess));
-  JMETHOD(void, realize_virt_arrays, (j_common_ptr cinfo));
-  JMETHOD(JSAMPARRAY, access_virt_sarray, (j_common_ptr cinfo,
-					   jvirt_sarray_ptr ptr,
-					   JDIMENSION start_row,
-					   JDIMENSION num_rows,
-					   boolean writable));
-  JMETHOD(JBLOCKARRAY, access_virt_barray, (j_common_ptr cinfo,
-					    jvirt_barray_ptr ptr,
-					    JDIMENSION start_row,
-					    JDIMENSION num_rows,
-					    boolean writable));
-  JMETHOD(void, free_pool, (j_common_ptr cinfo, int pool_id));
-  JMETHOD(void, self_destruct, (j_common_ptr cinfo));
-
-  /* Limit on memory allocation for this JPEG object.  (Note that this is
-   * merely advisory, not a guaranteed maximum; it only affects the space
-   * used for virtual-array buffers.)  May be changed by outer application
-   * after creating the JPEG object.
-   */
-  long max_memory_to_use;
-};
-
-
-/* Routine signature for application-supplied marker processing methods.
- * Need not pass marker code since it is stored in cinfo->unread_marker.
- */
-typedef JMETHOD(boolean, jpeg_marker_parser_method, (j_decompress_ptr cinfo));
-
-
-/* Declarations for routines called by application.
- * The JPP macro hides prototype parameters from compilers that can't cope.
- * Note JPP requires double parentheses.
- */
-
-#ifdef HAVE_PROTOTYPES
-#define JPP(arglist)	arglist
-#else
-#define JPP(arglist)	()
-#endif
-
-
-/* Short forms of external names for systems with brain-damaged linkers.
- * We shorten external names to be unique in the first six letters, which
- * is good enough for all known systems.
- * (If your compiler itself needs names to be unique in less than 15 
- * characters, you are out of luck.  Get a better compiler.)
- */
-
-#ifdef NEED_SHORT_EXTERNAL_NAMES
-#define jpeg_std_error		jStdError
-#define jpeg_CreateCompress	jCreaCompress
-#define jpeg_CreateDecompress	jCreaDecompress
-#define jpeg_destroy_compress	jDestCompress
-#define jpeg_destroy_decompress	jDestDecompress
-#define jpeg_stdio_dest		jStdDest
-#define jpeg_stdio_src		jStdSrc
-#define jpeg_set_defaults	jSetDefaults
-#define jpeg_set_colorspace	jSetColorspace
-#define jpeg_default_colorspace	jDefColorspace
-#define jpeg_set_quality	jSetQuality
-#define jpeg_set_linear_quality	jSetLQuality
-#define jpeg_add_quant_table	jAddQuantTable
-#define jpeg_quality_scaling	jQualityScaling
-#define jpeg_simple_progression	jSimProgress
-#define jpeg_suppress_tables	jSuppressTables
-#define jpeg_alloc_quant_table	jAlcQTable
-#define jpeg_alloc_huff_table	jAlcHTable
-#define jpeg_start_compress	jStrtCompress
-#define jpeg_write_scanlines	jWrtScanlines
-#define jpeg_finish_compress	jFinCompress
-#define jpeg_write_raw_data	jWrtRawData
-#define jpeg_write_marker	jWrtMarker
-#define jpeg_write_tables	jWrtTables
-#define jpeg_read_header	jReadHeader
-#define jpeg_start_decompress	jStrtDecompress
-#define jpeg_read_scanlines	jReadScanlines
-#define jpeg_finish_decompress	jFinDecompress
-#define jpeg_read_raw_data	jReadRawData
-#define jpeg_has_multiple_scans	jHasMultScn
-#define jpeg_start_output	jStrtOutput
-#define jpeg_finish_output	jFinOutput
-#define jpeg_input_complete	jInComplete
-#define jpeg_new_colormap	jNewCMap
-#define jpeg_consume_input	jConsumeInput
-#define jpeg_calc_output_dimensions	jCalcDimensions
-#define jpeg_set_marker_processor	jSetMarker
-#define jpeg_read_coefficients	jReadCoefs
-#define jpeg_write_coefficients	jWrtCoefs
-#define jpeg_copy_critical_parameters	jCopyCrit
-#define jpeg_abort_compress	jAbrtCompress
-#define jpeg_abort_decompress	jAbrtDecompress
-#define jpeg_abort		jAbort
-#define jpeg_destroy		jDestroy
-#define jpeg_resync_to_restart	jResyncRestart
-#endif /* NEED_SHORT_EXTERNAL_NAMES */
-
-
-/* Default error-management setup */
-EXTERN(struct jpeg_error_mgr *) jpeg_std_error
-	JPP((struct jpeg_error_mgr * err));
-
-/* Initialization of JPEG compression objects.
- * jpeg_create_compress() and jpeg_create_decompress() are the exported
- * names that applications should call.  These expand to calls on
- * jpeg_CreateCompress and jpeg_CreateDecompress with additional information
- * passed for version mismatch checking.
- * NB: you must set up the error-manager BEFORE calling jpeg_create_xxx.
- */
-#define jpeg_create_compress(cinfo) \
-    jpeg_CreateCompress((cinfo), JPEG_LIB_VERSION, \
-			(size_t) sizeof(struct jpeg_compress_struct))
-#define jpeg_create_decompress(cinfo) \
-    jpeg_CreateDecompress((cinfo), JPEG_LIB_VERSION, \
-			  (size_t) sizeof(struct jpeg_decompress_struct))
-EXTERN(void) jpeg_CreateCompress JPP((j_compress_ptr cinfo,
-				      int version, size_t structsize));
-EXTERN(void) jpeg_CreateDecompress JPP((j_decompress_ptr cinfo,
-					int version, size_t structsize));
-/* Destruction of JPEG compression objects */
-EXTERN(void) jpeg_destroy_compress JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_destroy_decompress JPP((j_decompress_ptr cinfo));
-
-/* Standard data source and destination managers: stdio streams. */
-/* Caller is responsible for opening the file before and closing after. */
-EXTERN(void) jpeg_stdio_dest JPP((j_compress_ptr cinfo, FILE * outfile));
-EXTERN(void) jpeg_stdio_src JPP((j_decompress_ptr cinfo, FILE * infile));
-
-/* Default parameter setup for compression */
-EXTERN(void) jpeg_set_defaults JPP((j_compress_ptr cinfo));
-/* Compression parameter setup aids */
-EXTERN(void) jpeg_set_colorspace JPP((j_compress_ptr cinfo,
-				      J_COLOR_SPACE colorspace));
-EXTERN(void) jpeg_default_colorspace JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_set_quality JPP((j_compress_ptr cinfo, int quality,
-				   boolean force_baseline));
-EXTERN(void) jpeg_set_linear_quality JPP((j_compress_ptr cinfo,
-					  int scale_factor,
-					  boolean force_baseline));
-EXTERN(void) jpeg_add_quant_table JPP((j_compress_ptr cinfo, int which_tbl,
-				       const unsigned int *basic_table,
-				       int scale_factor,
-				       boolean force_baseline));
-EXTERN(int) jpeg_quality_scaling JPP((int quality));
-EXTERN(void) jpeg_simple_progression JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_suppress_tables JPP((j_compress_ptr cinfo,
-				       boolean suppress));
-EXTERN(JQUANT_TBL *) jpeg_alloc_quant_table JPP((j_common_ptr cinfo));
-EXTERN(JHUFF_TBL *) jpeg_alloc_huff_table JPP((j_common_ptr cinfo));
-
-/* Main entry points for compression */
-EXTERN(void) jpeg_start_compress JPP((j_compress_ptr cinfo,
-				      boolean write_all_tables));
-EXTERN(JDIMENSION) jpeg_write_scanlines JPP((j_compress_ptr cinfo,
-					     JSAMPARRAY scanlines,
-					     JDIMENSION num_lines));
-EXTERN(void) jpeg_finish_compress JPP((j_compress_ptr cinfo));
-
-/* Replaces jpeg_write_scanlines when writing raw downsampled data. */
-EXTERN(JDIMENSION) jpeg_write_raw_data JPP((j_compress_ptr cinfo,
-					    JSAMPIMAGE data,
-					    JDIMENSION num_lines));
-
-/* Write a special marker.  See libjpeg.doc concerning safe usage. */
-EXTERN(void) jpeg_write_marker
-	JPP((j_compress_ptr cinfo, int marker,
-	     const JOCTET * dataptr, unsigned int datalen));
-
-/* Alternate compression function: just write an abbreviated table file */
-EXTERN(void) jpeg_write_tables JPP((j_compress_ptr cinfo));
-
-/* Decompression startup: read start of JPEG datastream to see what's there */
-EXTERN(int) jpeg_read_header JPP((j_decompress_ptr cinfo,
-				  boolean require_image));
-/* Return value is one of: */
-#define JPEG_SUSPENDED		0 /* Suspended due to lack of input data */
-#define JPEG_HEADER_OK		1 /* Found valid image datastream */
-#define JPEG_HEADER_TABLES_ONLY	2 /* Found valid table-specs-only datastream */
-/* If you pass require_image = TRUE (normal case), you need not check for
- * a TABLES_ONLY return code; an abbreviated file will cause an error exit.
- * JPEG_SUSPENDED is only possible if you use a data source module that can
- * give a suspension return (the stdio source module doesn't).
- */
-
-/* Main entry points for decompression */
-EXTERN(boolean) jpeg_start_decompress JPP((j_decompress_ptr cinfo));
-EXTERN(JDIMENSION) jpeg_read_scanlines JPP((j_decompress_ptr cinfo,
-					    JSAMPARRAY scanlines,
-					    JDIMENSION max_lines));
-EXTERN(boolean) jpeg_finish_decompress JPP((j_decompress_ptr cinfo));
-
-/* Replaces jpeg_read_scanlines when reading raw downsampled data. */
-EXTERN(JDIMENSION) jpeg_read_raw_data JPP((j_decompress_ptr cinfo,
-					   JSAMPIMAGE data,
-					   JDIMENSION max_lines));
-
-/* Additional entry points for buffered-image mode. */
-EXTERN(boolean) jpeg_has_multiple_scans JPP((j_decompress_ptr cinfo));
-EXTERN(boolean) jpeg_start_output JPP((j_decompress_ptr cinfo,
-				       int scan_number));
-EXTERN(boolean) jpeg_finish_output JPP((j_decompress_ptr cinfo));
-EXTERN(boolean) jpeg_input_complete JPP((j_decompress_ptr cinfo));
-EXTERN(void) jpeg_new_colormap JPP((j_decompress_ptr cinfo));
-EXTERN(int) jpeg_consume_input JPP((j_decompress_ptr cinfo));
-/* Return value is one of: */
-/* #define JPEG_SUSPENDED	0    Suspended due to lack of input data */
-#define JPEG_REACHED_SOS	1 /* Reached start of new scan */
-#define JPEG_REACHED_EOI	2 /* Reached end of image */
-#define JPEG_ROW_COMPLETED	3 /* Completed one iMCU row */
-#define JPEG_SCAN_COMPLETED	4 /* Completed last iMCU row of a scan */
-
-/* Precalculate output dimensions for current decompression parameters. */
-EXTERN(void) jpeg_calc_output_dimensions JPP((j_decompress_ptr cinfo));
-
-/* Install a special processing method for COM or APPn markers. */
-EXTERN(void) jpeg_set_marker_processor
-	JPP((j_decompress_ptr cinfo, int marker_code,
-	     jpeg_marker_parser_method routine));
-
-/* Read or write raw DCT coefficients --- useful for lossless transcoding. */
-EXTERN(jvirt_barray_ptr *) jpeg_read_coefficients JPP((j_decompress_ptr cinfo));
-EXTERN(void) jpeg_write_coefficients JPP((j_compress_ptr cinfo,
-					  jvirt_barray_ptr * coef_arrays));
-EXTERN(void) jpeg_copy_critical_parameters JPP((j_decompress_ptr srcinfo,
-						j_compress_ptr dstinfo));
-
-/* If you choose to abort compression or decompression before completing
- * jpeg_finish_(de)compress, then you need to clean up to release memory,
- * temporary files, etc.  You can just call jpeg_destroy_(de)compress
- * if you're done with the JPEG object, but if you want to clean it up and
- * reuse it, call this:
- */
-EXTERN(void) jpeg_abort_compress JPP((j_compress_ptr cinfo));
-EXTERN(void) jpeg_abort_decompress JPP((j_decompress_ptr cinfo));
-
-/* Generic versions of jpeg_abort and jpeg_destroy that work on either
- * flavor of JPEG object.  These may be more convenient in some places.
- */
-EXTERN(void) jpeg_abort JPP((j_common_ptr cinfo));
-EXTERN(void) jpeg_destroy JPP((j_common_ptr cinfo));
-
-/* Default restart-marker-resync procedure for use by data source modules */
-EXTERN(boolean) jpeg_resync_to_restart JPP((j_decompress_ptr cinfo,
-					    int desired));
-
-
-/* These marker codes are exported since applications and data source modules
- * are likely to want to use them.
- */
-
-#define JPEG_RST0	0xD0	/* RST0 marker code */
-#define JPEG_EOI	0xD9	/* EOI marker code */
-#define JPEG_APP0	0xE0	/* APP0 marker code */
-#define JPEG_COM	0xFE	/* COM marker code */
-
-
-/* If we have a brain-damaged compiler that emits warnings (or worse, errors)
- * for structure definitions that are never filled in, keep it quiet by
- * supplying dummy definitions for the various substructures.
- */
-
-#ifdef INCOMPLETE_TYPES_BROKEN
-#ifndef JPEG_INTERNALS		/* will be defined in jpegint.h */
-struct jvirt_sarray_control { long dummy; };
-struct jvirt_barray_control { long dummy; };
-struct jpeg_comp_master { long dummy; };
-struct jpeg_c_main_controller { long dummy; };
-struct jpeg_c_prep_controller { long dummy; };
-struct jpeg_c_coef_controller { long dummy; };
-struct jpeg_marker_writer { long dummy; };
-struct jpeg_color_converter { long dummy; };
-struct jpeg_downsampler { long dummy; };
-struct jpeg_forward_dct { long dummy; };
-struct jpeg_entropy_encoder { long dummy; };
-struct jpeg_decomp_master { long dummy; };
-struct jpeg_d_main_controller { long dummy; };
-struct jpeg_d_coef_controller { long dummy; };
-struct jpeg_d_post_controller { long dummy; };
-struct jpeg_input_controller { long dummy; };
-struct jpeg_marker_reader { long dummy; };
-struct jpeg_entropy_decoder { long dummy; };
-struct jpeg_inverse_dct { long dummy; };
-struct jpeg_upsampler { long dummy; };
-struct jpeg_color_deconverter { long dummy; };
-struct jpeg_color_quantizer { long dummy; };
-#endif /* JPEG_INTERNALS */
-#endif /* INCOMPLETE_TYPES_BROKEN */
-
-
-/*
- * The JPEG library modules define JPEG_INTERNALS before including this file.
- * The internal structure declarations are read only when that is true.
- * Applications using the library should not include jpegint.h, but may wish
- * to include jerror.h.
- */
-
-#ifdef JPEG_INTERNALS
-#include "jpegint.h"		/* fetch private declarations */
-#include "jerror.h"		/* fetch error codes too */
-#endif
-
-#endif /* JPEGLIB_H */

cde/lib/DtHelp/jpeg/jquant1.c

@@ -1,879 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jquant1.c /main/2 1996/05/09 03:53:55 drk $ */
-/*
- * jquant1.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains 1-pass color quantization (color mapping) routines.
- * These routines provide mapping to a fixed color map using equally spaced
- * color values.  Optional Floyd-Steinberg or ordered dithering is available.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-#ifdef QUANT_1PASS_SUPPORTED
-
-
-/*
- * The main purpose of 1-pass quantization is to provide a fast, if not very
- * high quality, colormapped output capability.  A 2-pass quantizer usually
- * gives better visual quality; however, for quantized grayscale output this
- * quantizer is perfectly adequate.  Dithering is highly recommended with this
- * quantizer, though you can turn it off if you really want to.
- *
- * In 1-pass quantization the colormap must be chosen in advance of seeing the
- * image.  We use a map consisting of all combinations of Ncolors[i] color
- * values for the i'th component.  The Ncolors[] values are chosen so that
- * their product, the total number of colors, is no more than that requested.
- * (In most cases, the product will be somewhat less.)
- *
- * Since the colormap is orthogonal, the representative value for each color
- * component can be determined without considering the other components;
- * then these indexes can be combined into a colormap index by a standard
- * N-dimensional-array-subscript calculation.  Most of the arithmetic involved
- * can be precalculated and stored in the lookup table colorindex[].
- * colorindex[i][j] maps pixel value j in component i to the nearest
- * representative value (grid plane) for that component; this index is
- * multiplied by the array stride for component i, so that the
- * index of the colormap entry closest to a given pixel value is just
- *    sum( colorindex[component-number][pixel-component-value] )
- * Aside from being fast, this scheme allows for variable spacing between
- * representative values with no additional lookup cost.
- *
- * If gamma correction has been applied in color conversion, it might be wise
- * to adjust the color grid spacing so that the representative colors are
- * equidistant in linear space.  At this writing, gamma correction is not
- * implemented by jdcolor, so nothing is done here.
- */
-
-
-/* Declarations for ordered dithering.
- *
- * We use a standard 16x16 ordered dither array.  The basic concept of ordered
- * dithering is described in many references, for instance Dale Schumacher's
- * chapter II.2 of Graphics Gems II (James Arvo, ed. Academic Press, 1991).
- * In place of Schumacher's comparisons against a "threshold" value, we add a
- * "dither" value to the input pixel and then round the result to the nearest
- * output value.  The dither value is equivalent to (0.5 - threshold) times
- * the distance between output values.  For ordered dithering, we assume that
- * the output colors are equally spaced; if not, results will probably be
- * worse, since the dither may be too much or too little at a given point.
- *
- * The normal calculation would be to form pixel value + dither, range-limit
- * this to 0..MAXJSAMPLE, and then index into the colorindex table as usual.
- * We can skip the separate range-limiting step by extending the colorindex
- * table in both directions.
- */
-
-#define ODITHER_SIZE  16	/* dimension of dither matrix */
-/* NB: if ODITHER_SIZE is not a power of 2, ODITHER_MASK uses will break */
-#define ODITHER_CELLS (ODITHER_SIZE*ODITHER_SIZE)	/* # cells in matrix */
-#define ODITHER_MASK  (ODITHER_SIZE-1) /* mask for wrapping around counters */
-
-typedef int ODITHER_MATRIX[ODITHER_SIZE][ODITHER_SIZE];
-typedef int (*ODITHER_MATRIX_PTR)[ODITHER_SIZE];
-
-static const UINT8 base_dither_matrix[ODITHER_SIZE][ODITHER_SIZE] = {
-  /* Bayer's order-4 dither array.  Generated by the code given in
-   * Stephen Hawley's article "Ordered Dithering" in Graphics Gems I.
-   * The values in this array must range from 0 to ODITHER_CELLS-1.
-   */
-  {   0,192, 48,240, 12,204, 60,252,  3,195, 51,243, 15,207, 63,255 },
-  { 128, 64,176,112,140, 76,188,124,131, 67,179,115,143, 79,191,127 },
-  {  32,224, 16,208, 44,236, 28,220, 35,227, 19,211, 47,239, 31,223 },
-  { 160, 96,144, 80,172,108,156, 92,163, 99,147, 83,175,111,159, 95 },
-  {   8,200, 56,248,  4,196, 52,244, 11,203, 59,251,  7,199, 55,247 },
-  { 136, 72,184,120,132, 68,180,116,139, 75,187,123,135, 71,183,119 },
-  {  40,232, 24,216, 36,228, 20,212, 43,235, 27,219, 39,231, 23,215 },
-  { 168,104,152, 88,164,100,148, 84,171,107,155, 91,167,103,151, 87 },
-  {   2,194, 50,242, 14,206, 62,254,  1,193, 49,241, 13,205, 61,253 },
-  { 130, 66,178,114,142, 78,190,126,129, 65,177,113,141, 77,189,125 },
-  {  34,226, 18,210, 46,238, 30,222, 33,225, 17,209, 45,237, 29,221 },
-  { 162, 98,146, 82,174,110,158, 94,161, 97,145, 81,173,109,157, 93 },
-  {  10,202, 58,250,  6,198, 54,246,  9,201, 57,249,  5,197, 53,245 },
-  { 138, 74,186,122,134, 70,182,118,137, 73,185,121,133, 69,181,117 },
-  {  42,234, 26,218, 38,230, 22,214, 41,233, 25,217, 37,229, 21,213 },
-  { 170,106,154, 90,166,102,150, 86,169,105,153, 89,165,101,149, 85 }
-};
-
-
-/* Declarations for Floyd-Steinberg dithering.
- *
- * Errors are accumulated into the array fserrors[], at a resolution of
- * 1/16th of a pixel count.  The error at a given pixel is propagated
- * to its not-yet-processed neighbors using the standard F-S fractions,
- *		...	(here)	7/16
- *		3/16	5/16	1/16
- * We work left-to-right on even rows, right-to-left on odd rows.
- *
- * We can get away with a single array (holding one row's worth of errors)
- * by using it to store the current row's errors at pixel columns not yet
- * processed, but the next row's errors at columns already processed.  We
- * need only a few extra variables to hold the errors immediately around the
- * current column.  (If we are lucky, those variables are in registers, but
- * even if not, they're probably cheaper to access than array elements are.)
- *
- * The fserrors[] array is indexed [component#][position].
- * We provide (#columns + 2) entries per component; the extra entry at each
- * end saves us from special-casing the first and last pixels.
- *
- * Note: on a wide image, we might not have enough room in a PC's near data
- * segment to hold the error array; so it is allocated with alloc_large.
- */
-
-#if BITS_IN_JSAMPLE == 8
-typedef INT16 FSERROR;		/* 16 bits should be enough */
-typedef int LOCFSERROR;		/* use 'int' for calculation temps */
-#else
-typedef INT32 FSERROR;		/* may need more than 16 bits */
-typedef INT32 LOCFSERROR;	/* be sure calculation temps are big enough */
-#endif
-
-typedef FSERROR FAR *FSERRPTR;	/* pointer to error array (in FAR storage!) */
-
-
-/* Private subobject */
-
-#define MAX_Q_COMPS 4		/* max components I can handle */
-
-typedef struct {
-  struct jpeg_color_quantizer pub; /* public fields */
-
-  /* Initially allocated colormap is saved here */
-  JSAMPARRAY sv_colormap;	/* The color map as a 2-D pixel array */
-  int sv_actual;		/* number of entries in use */
-
-  JSAMPARRAY colorindex;	/* Precomputed mapping for speed */
-  /* colorindex[i][j] = index of color closest to pixel value j in component i,
-   * premultiplied as described above.  Since colormap indexes must fit into
-   * JSAMPLEs, the entries of this array will too.
-   */
-  boolean is_padded;		/* is the colorindex padded for odither? */
-
-  int Ncolors[MAX_Q_COMPS];	/* # of values alloced to each component */
-
-  /* Variables for ordered dithering */
-  int row_index;		/* cur row's vertical index in dither matrix */
-  ODITHER_MATRIX_PTR odither[MAX_Q_COMPS]; /* one dither array per component */
-
-  /* Variables for Floyd-Steinberg dithering */
-  FSERRPTR fserrors[MAX_Q_COMPS]; /* accumulated errors */
-  boolean on_odd_row;		/* flag to remember which row we are on */
-} my_cquantizer;
-
-typedef my_cquantizer * my_cquantize_ptr;
-
-
-/*
- * Policy-making subroutines for create_colormap and create_colorindex.
- * These routines determine the colormap to be used.  The rest of the module
- * only assumes that the colormap is orthogonal.
- *
- *  * select_ncolors decides how to divvy up the available colors
- *    among the components.
- *  * output_value defines the set of representative values for a component.
- *  * largest_input_value defines the mapping from input values to
- *    representative values for a component.
- * Note that the latter two routines may impose different policies for
- * different components, though this is not currently done.
- */
-
-
-LOCAL(int)
-select_ncolors (j_decompress_ptr cinfo, int Ncolors[])
-/* Determine allocation of desired colors to components, */
-/* and fill in Ncolors[] array to indicate choice. */
-/* Return value is total number of colors (product of Ncolors[] values). */
-{
-  int nc = cinfo->out_color_components; /* number of color components */
-  int max_colors = cinfo->desired_number_of_colors;
-  int total_colors, iroot, i, j;
-  boolean changed;
-  long temp;
-  static const int RGB_order[3] = { RGB_GREEN, RGB_RED, RGB_BLUE };
-
-  /* We can allocate at least the nc'th root of max_colors per component. */
-  /* Compute floor(nc'th root of max_colors). */
-  iroot = 1;
-  do {
-    iroot++;
-    temp = iroot;		/* set temp = iroot ** nc */
-    for (i = 1; i < nc; i++)
-      temp *= iroot;
-  } while (temp <= (long) max_colors); /* repeat till iroot exceeds root */
-  iroot--;			/* now iroot = floor(root) */
-
-  /* Must have at least 2 color values per component */
-  if (iroot < 2)
-    ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, (int) temp);
-
-  /* Initialize to iroot color values for each component */
-  total_colors = 1;
-  for (i = 0; i < nc; i++) {
-    Ncolors[i] = iroot;
-    total_colors *= iroot;
-  }
-  /* We may be able to increment the count for one or more components without
-   * exceeding max_colors, though we know not all can be incremented.
-   * Sometimes, the first component can be incremented more than once!
-   * (Example: for 16 colors, we start at 2*2*2, go to 3*2*2, then 4*2*2.)
-   * In RGB colorspace, try to increment G first, then R, then B.
-   */
-  do {
-    changed = FALSE;
-    for (i = 0; i < nc; i++) {
-      j = (cinfo->out_color_space == JCS_RGB ? RGB_order[i] : i);
-      /* calculate new total_colors if Ncolors[j] is incremented */
-      temp = total_colors / Ncolors[j];
-      temp *= Ncolors[j]+1;	/* done in long arith to avoid oflo */
-      if (temp > (long) max_colors)
-	break;			/* won't fit, done with this pass */
-      Ncolors[j]++;		/* OK, apply the increment */
-      total_colors = (int) temp;
-      changed = TRUE;
-    }
-  } while (changed);
-
-  return total_colors;
-}
-
-
-LOCAL(int)
-output_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
-/* Return j'th output value, where j will range from 0 to maxj */
-/* The output values must fall in 0..MAXJSAMPLE in increasing order */
-{
-  /* We always provide values 0 and MAXJSAMPLE for each component;
-   * any additional values are equally spaced between these limits.
-   * (Forcing the upper and lower values to the limits ensures that
-   * dithering can't produce a color outside the selected gamut.)
-   */
-  return (int) (((INT32) j * MAXJSAMPLE + maxj/2) / maxj);
-}
-
-
-LOCAL(int)
-largest_input_value (j_decompress_ptr cinfo, int ci, int j, int maxj)
-/* Return largest input value that should map to j'th output value */
-/* Must have largest(j=0) >= 0, and largest(j=maxj) >= MAXJSAMPLE */
-{
-  /* Breakpoints are halfway between values returned by output_value */
-  return (int) (((INT32) (2*j + 1) * MAXJSAMPLE + maxj) / (2*maxj));
-}
-
-
-/*
- * Create the colormap.
- */
-
-LOCAL(void)
-create_colormap (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  JSAMPARRAY colormap;		/* Created colormap */
-  int total_colors;		/* Number of distinct output colors */
-  int i,j,k, nci, blksize, blkdist, ptr, val;
-
-  /* Select number of colors for each component */
-  total_colors = select_ncolors(cinfo, cquantize->Ncolors);
-
-  /* Report selected color counts */
-  if (cinfo->out_color_components == 3)
-    TRACEMS4(cinfo, 1, JTRC_QUANT_3_NCOLORS,
-	     total_colors, cquantize->Ncolors[0],
-	     cquantize->Ncolors[1], cquantize->Ncolors[2]);
-  else
-    TRACEMS1(cinfo, 1, JTRC_QUANT_NCOLORS, total_colors);
-
-  /* Allocate and fill in the colormap. */
-  /* The colors are ordered in the map in standard row-major order, */
-  /* i.e. rightmost (highest-indexed) color changes most rapidly. */
-
-  colormap = (*cinfo->mem->alloc_sarray)
-    ((j_common_ptr) cinfo, JPOOL_IMAGE,
-     (JDIMENSION) total_colors, (JDIMENSION) cinfo->out_color_components);
-
-  /* blksize is number of adjacent repeated entries for a component */
-  /* blkdist is distance between groups of identical entries for a component */
-  blkdist = total_colors;
-
-  for (i = 0; i < cinfo->out_color_components; i++) {
-    /* fill in colormap entries for i'th color component */
-    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
-    blksize = blkdist / nci;
-    for (j = 0; j < nci; j++) {
-      /* Compute j'th output value (out of nci) for component */
-      val = output_value(cinfo, i, j, nci-1);
-      /* Fill in all colormap entries that have this value of this component */
-      for (ptr = j * blksize; ptr < total_colors; ptr += blkdist) {
-	/* fill in blksize entries beginning at ptr */
-	for (k = 0; k < blksize; k++)
-	  colormap[i][ptr+k] = (JSAMPLE) val;
-      }
-    }
-    blkdist = blksize;		/* blksize of this color is blkdist of next */
-  }
-
-  /* Save the colormap in private storage,
-   * where it will survive color quantization mode changes.
-   */
-  cquantize->sv_colormap = colormap;
-  cquantize->sv_actual = total_colors;
-}
-
-
-/*
- * Create the color index table.
- */
-
-LOCAL(void)
-create_colorindex (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  JSAMPROW indexptr;
-  int i,j,k, nci, blksize, val, pad;
-
-  /* For ordered dither, we pad the color index tables by MAXJSAMPLE in
-   * each direction (input index values can be -MAXJSAMPLE .. 2*MAXJSAMPLE).
-   * This is not necessary in the other dithering modes.  However, we
-   * flag whether it was done in case user changes dithering mode.
-   */
-  if (cinfo->dither_mode == JDITHER_ORDERED) {
-    pad = MAXJSAMPLE*2;
-    cquantize->is_padded = TRUE;
-  } else {
-    pad = 0;
-    cquantize->is_padded = FALSE;
-  }
-
-  cquantize->colorindex = (*cinfo->mem->alloc_sarray)
-    ((j_common_ptr) cinfo, JPOOL_IMAGE,
-     (JDIMENSION) (MAXJSAMPLE+1 + pad),
-     (JDIMENSION) cinfo->out_color_components);
-
-  /* blksize is number of adjacent repeated entries for a component */
-  blksize = cquantize->sv_actual;
-
-  for (i = 0; i < cinfo->out_color_components; i++) {
-    /* fill in colorindex entries for i'th color component */
-    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
-    blksize = blksize / nci;
-
-    /* adjust colorindex pointers to provide padding at negative indexes. */
-    if (pad)
-      cquantize->colorindex[i] += MAXJSAMPLE;
-
-    /* in loop, val = index of current output value, */
-    /* and k = largest j that maps to current val */
-    indexptr = cquantize->colorindex[i];
-    val = 0;
-    k = largest_input_value(cinfo, i, 0, nci-1);
-    for (j = 0; j <= MAXJSAMPLE; j++) {
-      while (j > k)		/* advance val if past boundary */
-	k = largest_input_value(cinfo, i, ++val, nci-1);
-      /* premultiply so that no multiplication needed in main processing */
-      indexptr[j] = (JSAMPLE) (val * blksize);
-    }
-    /* Pad at both ends if necessary */
-    if (pad)
-      for (j = 1; j <= MAXJSAMPLE; j++) {
-	indexptr[-j] = indexptr[0];
-	indexptr[MAXJSAMPLE+j] = indexptr[MAXJSAMPLE];
-      }
-  }
-}
-
-
-/*
- * Create an ordered-dither array for a component having ncolors
- * distinct output values.
- */
-
-LOCAL(ODITHER_MATRIX_PTR)
-make_odither_array (j_decompress_ptr cinfo, int ncolors)
-{
-  ODITHER_MATRIX_PTR odither;
-  int j,k;
-  INT32 num,den;
-
-  odither = (ODITHER_MATRIX_PTR)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(ODITHER_MATRIX));
-  /* The inter-value distance for this color is MAXJSAMPLE/(ncolors-1).
-   * Hence the dither value for the matrix cell with fill order f
-   * (f=0..N-1) should be (N-1-2*f)/(2*N) * MAXJSAMPLE/(ncolors-1).
-   * On 16-bit-int machine, be careful to avoid overflow.
-   */
-  den = 2 * ODITHER_CELLS * ((INT32) (ncolors - 1));
-  for (j = 0; j < ODITHER_SIZE; j++) {
-    for (k = 0; k < ODITHER_SIZE; k++) {
-      num = ((INT32) (ODITHER_CELLS-1 - 2*((int)base_dither_matrix[j][k])))
-	    * MAXJSAMPLE;
-      /* Ensure round towards zero despite C's lack of consistency
-       * about rounding negative values in integer division...
-       */
-      odither[j][k] = (int) (num<0 ? -((-num)/den) : num/den);
-    }
-  }
-  return odither;
-}
-
-
-/*
- * Create the ordered-dither tables.
- * Components having the same number of representative colors may 
- * share a dither table.
- */
-
-LOCAL(void)
-create_odither_tables (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  ODITHER_MATRIX_PTR odither;
-  int i, j, nci;
-
-  for (i = 0; i < cinfo->out_color_components; i++) {
-    nci = cquantize->Ncolors[i]; /* # of distinct values for this color */
-    odither = NULL;		/* search for matching prior component */
-    for (j = 0; j < i; j++) {
-      if (nci == cquantize->Ncolors[j]) {
-	odither = cquantize->odither[j];
-	break;
-      }
-    }
-    if (odither == NULL)	/* need a new table? */
-      odither = make_odither_array(cinfo, nci);
-    cquantize->odither[i] = odither;
-  }
-}
-
-
-/*
- * Map some rows of pixels to the output colormapped representation.
- */
-
-METHODDEF(void)
-color_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		JSAMPARRAY output_buf, int num_rows)
-/* General case, no dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  JSAMPARRAY colorindex = cquantize->colorindex;
-  int pixcode, ci;
-  JSAMPROW ptrin, ptrout;
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-  int nc = cinfo->out_color_components;
-
-  for (row = 0; row < num_rows; row++) {
-    ptrin = input_buf[row];
-    ptrout = output_buf[row];
-    for (col = width; col > 0; col--) {
-      pixcode = 0;
-      for (ci = 0; ci < nc; ci++) {
-	pixcode += GETJSAMPLE(colorindex[ci][GETJSAMPLE(*ptrin++)]);
-      }
-      *ptrout++ = (JSAMPLE) pixcode;
-    }
-  }
-}
-
-
-METHODDEF(void)
-color_quantize3 (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		 JSAMPARRAY output_buf, int num_rows)
-/* Fast path for out_color_components==3, no dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  int pixcode;
-  JSAMPROW ptrin, ptrout;
-  JSAMPROW colorindex0 = cquantize->colorindex[0];
-  JSAMPROW colorindex1 = cquantize->colorindex[1];
-  JSAMPROW colorindex2 = cquantize->colorindex[2];
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-
-  for (row = 0; row < num_rows; row++) {
-    ptrin = input_buf[row];
-    ptrout = output_buf[row];
-    for (col = width; col > 0; col--) {
-      pixcode  = GETJSAMPLE(colorindex0[GETJSAMPLE(*ptrin++)]);
-      pixcode += GETJSAMPLE(colorindex1[GETJSAMPLE(*ptrin++)]);
-      pixcode += GETJSAMPLE(colorindex2[GETJSAMPLE(*ptrin++)]);
-      *ptrout++ = (JSAMPLE) pixcode;
-    }
-  }
-}
-
-
-METHODDEF(void)
-quantize_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		     JSAMPARRAY output_buf, int num_rows)
-/* General case, with ordered dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  JSAMPROW input_ptr;
-  JSAMPROW output_ptr;
-  JSAMPROW colorindex_ci;
-  int * dither;			/* points to active row of dither matrix */
-  int row_index, col_index;	/* current indexes into dither matrix */
-  int nc = cinfo->out_color_components;
-  int ci;
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-
-  for (row = 0; row < num_rows; row++) {
-    /* Initialize output values to 0 so can process components separately */
-    jzero_far((void FAR *) output_buf[row],
-	      (size_t) (width * SIZEOF(JSAMPLE)));
-    row_index = cquantize->row_index;
-    for (ci = 0; ci < nc; ci++) {
-      input_ptr = input_buf[row] + ci;
-      output_ptr = output_buf[row];
-      colorindex_ci = cquantize->colorindex[ci];
-      dither = cquantize->odither[ci][row_index];
-      col_index = 0;
-
-      for (col = width; col > 0; col--) {
-	/* Form pixel value + dither, range-limit to 0..MAXJSAMPLE,
-	 * select output value, accumulate into output code for this pixel.
-	 * Range-limiting need not be done explicitly, as we have extended
-	 * the colorindex table to produce the right answers for out-of-range
-	 * inputs.  The maximum dither is +- MAXJSAMPLE; this sets the
-	 * required amount of padding.
-	 */
-	*output_ptr += colorindex_ci[GETJSAMPLE(*input_ptr)+dither[col_index]];
-	input_ptr += nc;
-	output_ptr++;
-	col_index = (col_index + 1) & ODITHER_MASK;
-      }
-    }
-    /* Advance row index for next row */
-    row_index = (row_index + 1) & ODITHER_MASK;
-    cquantize->row_index = row_index;
-  }
-}
-
-
-METHODDEF(void)
-quantize3_ord_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		      JSAMPARRAY output_buf, int num_rows)
-/* Fast path for out_color_components==3, with ordered dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  int pixcode;
-  JSAMPROW input_ptr;
-  JSAMPROW output_ptr;
-  JSAMPROW colorindex0 = cquantize->colorindex[0];
-  JSAMPROW colorindex1 = cquantize->colorindex[1];
-  JSAMPROW colorindex2 = cquantize->colorindex[2];
-  int * dither0;		/* points to active row of dither matrix */
-  int * dither1;
-  int * dither2;
-  int row_index, col_index;	/* current indexes into dither matrix */
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-
-  for (row = 0; row < num_rows; row++) {
-    row_index = cquantize->row_index;
-    input_ptr = input_buf[row];
-    output_ptr = output_buf[row];
-    dither0 = cquantize->odither[0][row_index];
-    dither1 = cquantize->odither[1][row_index];
-    dither2 = cquantize->odither[2][row_index];
-    col_index = 0;
-
-    for (col = width; col > 0; col--) {
-      pixcode  = GETJSAMPLE(colorindex0[GETJSAMPLE(*input_ptr++) +
-					dither0[col_index]]);
-      pixcode += GETJSAMPLE(colorindex1[GETJSAMPLE(*input_ptr++) +
-					dither1[col_index]]);
-      pixcode += GETJSAMPLE(colorindex2[GETJSAMPLE(*input_ptr++) +
-					dither2[col_index]]);
-      *output_ptr++ = (JSAMPLE) pixcode;
-      col_index = (col_index + 1) & ODITHER_MASK;
-    }
-    row_index = (row_index + 1) & ODITHER_MASK;
-    cquantize->row_index = row_index;
-  }
-}
-
-
-METHODDEF(void)
-quantize_fs_dither (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		    JSAMPARRAY output_buf, int num_rows)
-/* General case, with Floyd-Steinberg dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  LOCFSERROR cur;	/* current error or pixel value */
-  LOCFSERROR belowerr;		/* error for pixel below cur */
-  LOCFSERROR bpreverr;		/* error for below/prev col */
-  LOCFSERROR bnexterr;		/* error for below/next col */
-  LOCFSERROR delta;
-  FSERRPTR errorptr;	/* => fserrors[] at column before current */
-  JSAMPROW input_ptr;
-  JSAMPROW output_ptr;
-  JSAMPROW colorindex_ci;
-  JSAMPROW colormap_ci;
-  int pixcode;
-  int nc = cinfo->out_color_components;
-  int dir;			/* 1 for left-to-right, -1 for right-to-left */
-  int dirnc;			/* dir * nc */
-  int ci;
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-  JSAMPLE *range_limit = cinfo->sample_range_limit;
-  SHIFT_TEMPS
-
-  for (row = 0; row < num_rows; row++) {
-    /* Initialize output values to 0 so can process components separately */
-    jzero_far((void FAR *) output_buf[row],
-	      (size_t) (width * SIZEOF(JSAMPLE)));
-    for (ci = 0; ci < nc; ci++) {
-      input_ptr = input_buf[row] + ci;
-      output_ptr = output_buf[row];
-      if (cquantize->on_odd_row) {
-	/* work right to left in this row */
-	input_ptr += (width-1) * nc; /* so point to rightmost pixel */
-	output_ptr += width-1;
-	dir = -1;
-	dirnc = -nc;
-	errorptr = cquantize->fserrors[ci] + (width+1); /* => entry after last column */
-      } else {
-	/* work left to right in this row */
-	dir = 1;
-	dirnc = nc;
-	errorptr = cquantize->fserrors[ci]; /* => entry before first column */
-      }
-      colorindex_ci = cquantize->colorindex[ci];
-      colormap_ci = cquantize->sv_colormap[ci];
-      /* Preset error values: no error propagated to first pixel from left */
-      cur = 0;
-      /* and no error propagated to row below yet */
-      belowerr = bpreverr = 0;
-
-      for (col = width; col > 0; col--) {
-	/* cur holds the error propagated from the previous pixel on the
-	 * current line.  Add the error propagated from the previous line
-	 * to form the complete error correction term for this pixel, and
-	 * round the error term (which is expressed * 16) to an integer.
-	 * RIGHT_SHIFT rounds towards minus infinity, so adding 8 is correct
-	 * for either sign of the error value.
-	 * Note: errorptr points to *previous* column's array entry.
-	 */
-	cur = RIGHT_SHIFT(cur + errorptr[dir] + 8, 4);
-	/* Form pixel value + error, and range-limit to 0..MAXJSAMPLE.
-	 * The maximum error is +- MAXJSAMPLE; this sets the required size
-	 * of the range_limit array.
-	 */
-	cur += GETJSAMPLE(*input_ptr);
-	cur = GETJSAMPLE(range_limit[cur]);
-	/* Select output value, accumulate into output code for this pixel */
-	pixcode = GETJSAMPLE(colorindex_ci[cur]);
-	*output_ptr += (JSAMPLE) pixcode;
-	/* Compute actual representation error at this pixel */
-	/* Note: we can do this even though we don't have the final */
-	/* pixel code, because the colormap is orthogonal. */
-	cur -= GETJSAMPLE(colormap_ci[pixcode]);
-	/* Compute error fractions to be propagated to adjacent pixels.
-	 * Add these into the running sums, and simultaneously shift the
-	 * next-line error sums left by 1 column.
-	 */
-	bnexterr = cur;
-	delta = cur * 2;
-	cur += delta;		/* form error * 3 */
-	errorptr[0] = (FSERROR) (bpreverr + cur);
-	cur += delta;		/* form error * 5 */
-	bpreverr = belowerr + cur;
-	belowerr = bnexterr;
-	cur += delta;		/* form error * 7 */
-	/* At this point cur contains the 7/16 error value to be propagated
-	 * to the next pixel on the current line, and all the errors for the
-	 * next line have been shifted over. We are therefore ready to move on.
-	 */
-	input_ptr += dirnc;	/* advance input ptr to next column */
-	output_ptr += dir;	/* advance output ptr to next column */
-	errorptr += dir;	/* advance errorptr to current column */
-      }
-      /* Post-loop cleanup: we must unload the final error value into the
-       * final fserrors[] entry.  Note we need not unload belowerr because
-       * it is for the dummy column before or after the actual array.
-       */
-      errorptr[0] = (FSERROR) bpreverr; /* unload prev err into array */
-    }
-    cquantize->on_odd_row = (cquantize->on_odd_row ? FALSE : TRUE);
-  }
-}
-
-
-/*
- * Allocate workspace for Floyd-Steinberg errors.
- */
-
-LOCAL(void)
-alloc_fs_workspace (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  size_t arraysize;
-  int i;
-
-  arraysize = (size_t) ((cinfo->output_width + 2) * SIZEOF(FSERROR));
-  for (i = 0; i < cinfo->out_color_components; i++) {
-    cquantize->fserrors[i] = (FSERRPTR)
-      (*cinfo->mem->alloc_large)((j_common_ptr) cinfo, JPOOL_IMAGE, arraysize);
-  }
-}
-
-
-/*
- * Initialize for one-pass color quantization.
- */
-
-METHODDEF(void)
-start_pass_1_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  size_t arraysize;
-  int i;
-
-  /* Install my colormap. */
-  cinfo->colormap = cquantize->sv_colormap;
-  cinfo->actual_number_of_colors = cquantize->sv_actual;
-
-  /* Initialize for desired dithering mode. */
-  switch (cinfo->dither_mode) {
-  case JDITHER_NONE:
-    if (cinfo->out_color_components == 3)
-      cquantize->pub.color_quantize = color_quantize3;
-    else
-      cquantize->pub.color_quantize = color_quantize;
-    break;
-  case JDITHER_ORDERED:
-    if (cinfo->out_color_components == 3)
-      cquantize->pub.color_quantize = quantize3_ord_dither;
-    else
-      cquantize->pub.color_quantize = quantize_ord_dither;
-    cquantize->row_index = 0;	/* initialize state for ordered dither */
-    /* If user changed to ordered dither from another mode,
-     * we must recreate the color index table with padding.
-     * This will cost extra space, but probably isn't very likely.
-     */
-    if (! cquantize->is_padded)
-      create_colorindex(cinfo);
-    /* Create ordered-dither tables if we didn't already. */
-    if (cquantize->odither[0] == NULL)
-      create_odither_tables(cinfo);
-    break;
-  case JDITHER_FS:
-    cquantize->pub.color_quantize = quantize_fs_dither;
-    cquantize->on_odd_row = FALSE; /* initialize state for F-S dither */
-    /* Allocate Floyd-Steinberg workspace if didn't already. */
-    if (cquantize->fserrors[0] == NULL)
-      alloc_fs_workspace(cinfo);
-    /* Initialize the propagated errors to zero. */
-    arraysize = (size_t) ((cinfo->output_width + 2) * SIZEOF(FSERROR));
-    for (i = 0; i < cinfo->out_color_components; i++)
-      jzero_far((void FAR *) cquantize->fserrors[i], arraysize);
-    break;
-  default:
-    ERREXIT(cinfo, JERR_NOT_COMPILED);
-    break;
-  }
-}
-
-
-/*
- * Finish up at the end of the pass.
- */
-
-METHODDEF(void)
-finish_pass_1_quant (j_decompress_ptr cinfo)
-{
-  /* no work in 1-pass case */
-}
-
-
-/*
- * Switch to a new external colormap between output passes.
- * Shouldn't get to this module!
- */
-
-METHODDEF(void)
-new_color_map_1_quant (j_decompress_ptr cinfo)
-{
-  ERREXIT(cinfo, JERR_MODE_CHANGE);
-}
-
-
-/*
- * Module initialization routine for 1-pass color quantization.
- */
-
-GLOBAL(void)
-jinit_1pass_quantizer (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize;
-
-  cquantize = (my_cquantize_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_cquantizer));
-  cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
-  cquantize->pub.start_pass = start_pass_1_quant;
-  cquantize->pub.finish_pass = finish_pass_1_quant;
-  cquantize->pub.new_color_map = new_color_map_1_quant;
-  cquantize->fserrors[0] = NULL; /* Flag FS workspace not allocated */
-  cquantize->odither[0] = NULL;	/* Also flag odither arrays not allocated */
-
-  /* Make sure my internal arrays won't overflow */
-  if (cinfo->out_color_components > MAX_Q_COMPS)
-    ERREXIT1(cinfo, JERR_QUANT_COMPONENTS, MAX_Q_COMPS);
-  /* Make sure colormap indexes can be represented by JSAMPLEs */
-  if (cinfo->desired_number_of_colors > (MAXJSAMPLE+1))
-    ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXJSAMPLE+1);
-
-  /* Create the colormap and color index table. */
-  create_colormap(cinfo);
-  create_colorindex(cinfo);
-
-  /* Allocate Floyd-Steinberg workspace now if requested.
-   * We do this now since it is FAR storage and may affect the memory
-   * manager's space calculations.  If the user changes to FS dither
-   * mode in a later pass, we will allocate the space then, and will
-   * possibly overrun the max_memory_to_use setting.
-   */
-  if (cinfo->dither_mode == JDITHER_FS)
-    alloc_fs_workspace(cinfo);
-}
-
-#endif /* QUANT_1PASS_SUPPORTED */

cde/lib/DtHelp/jpeg/jquant2.c

@@ -1,1333 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jquant2.c /main/2 1996/05/09 03:54:09 drk $ */
-/*
- * jquant2.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains 2-pass color quantization (color mapping) routines.
- * These routines provide selection of a custom color map for an image,
- * followed by mapping of the image to that color map, with optional
- * Floyd-Steinberg dithering.
- * It is also possible to use just the second pass to map to an arbitrary
- * externally-given color map.
- *
- * Note: ordered dithering is not supported, since there isn't any fast
- * way to compute intercolor distances; it's unclear that ordered dither's
- * fundamental assumptions even hold with an irregularly spaced color map.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-#ifdef QUANT_2PASS_SUPPORTED
-
-
-/*
- * This module implements the well-known Heckbert paradigm for color
- * quantization.  Most of the ideas used here can be traced back to
- * Heckbert's seminal paper
- *   Heckbert, Paul.  "Color Image Quantization for Frame Buffer Display",
- *   Proc. SIGGRAPH '82, Computer Graphics v.16 #3 (July 1982), pp 297-304.
- *
- * In the first pass over the image, we accumulate a histogram showing the
- * usage count of each possible color.  To keep the histogram to a reasonable
- * size, we reduce the precision of the input; typical practice is to retain
- * 5 or 6 bits per color, so that 8 or 4 different input values are counted
- * in the same histogram cell.
- *
- * Next, the color-selection step begins with a box representing the whole
- * color space, and repeatedly splits the "largest" remaining box until we
- * have as many boxes as desired colors.  Then the mean color in each
- * remaining box becomes one of the possible output colors.
- * 
- * The second pass over the image maps each input pixel to the closest output
- * color (optionally after applying a Floyd-Steinberg dithering correction).
- * This mapping is logically trivial, but making it go fast enough requires
- * considerable care.
- *
- * Heckbert-style quantizers vary a good deal in their policies for choosing
- * the "largest" box and deciding where to cut it.  The particular policies
- * used here have proved out well in experimental comparisons, but better ones
- * may yet be found.
- *
- * In earlier versions of the IJG code, this module quantized in YCbCr color
- * space, processing the raw upsampled data without a color conversion step.
- * This allowed the color conversion math to be done only once per colormap
- * entry, not once per pixel.  However, that optimization precluded other
- * useful optimizations (such as merging color conversion with upsampling)
- * and it also interfered with desired capabilities such as quantizing to an
- * externally-supplied colormap.  We have therefore abandoned that approach.
- * The present code works in the post-conversion color space, typically RGB.
- *
- * To improve the visual quality of the results, we actually work in scaled
- * RGB space, giving G distances more weight than R, and R in turn more than
- * B.  To do everything in integer math, we must use integer scale factors.
- * The 2/3/1 scale factors used here correspond loosely to the relative
- * weights of the colors in the NTSC grayscale equation.
- * If you want to use this code to quantize a non-RGB color space, you'll
- * probably need to change these scale factors.
- */
-
-#define R_SCALE 2		/* scale R distances by this much */
-#define G_SCALE 3		/* scale G distances by this much */
-#define B_SCALE 1		/* and B by this much */
-
-/* Relabel R/G/B as components 0/1/2, respecting the RGB ordering defined
- * in jmorecfg.h.  As the code stands, it will do the right thing for R,G,B
- * and B,G,R orders.  If you define some other weird order in jmorecfg.h,
- * you'll get compile errors until you extend this logic.  In that case
- * you'll probably want to tweak the histogram sizes too.
- */
-
-#if RGB_RED == 0
-#define C0_SCALE R_SCALE
-#endif
-#if RGB_BLUE == 0
-#define C0_SCALE B_SCALE
-#endif
-#if RGB_GREEN == 1
-#define C1_SCALE G_SCALE
-#endif
-#if RGB_RED == 2
-#define C2_SCALE R_SCALE
-#endif
-#if RGB_BLUE == 2
-#define C2_SCALE B_SCALE
-#endif
-
-
-/*
- * First we have the histogram data structure and routines for creating it.
- *
- * The number of bits of precision can be adjusted by changing these symbols.
- * We recommend keeping 6 bits for G and 5 each for R and B.
- * If you have plenty of memory and cycles, 6 bits all around gives marginally
- * better results; if you are short of memory, 5 bits all around will save
- * some space but degrade the results.
- * To maintain a fully accurate histogram, we'd need to allocate a "long"
- * (preferably unsigned long) for each cell.  In practice this is overkill;
- * we can get by with 16 bits per cell.  Few of the cell counts will overflow,
- * and clamping those that do overflow to the maximum value will give close-
- * enough results.  This reduces the recommended histogram size from 256Kb
- * to 128Kb, which is a useful savings on PC-class machines.
- * (In the second pass the histogram space is re-used for pixel mapping data;
- * in that capacity, each cell must be able to store zero to the number of
- * desired colors.  16 bits/cell is plenty for that too.)
- * Since the JPEG code is intended to run in small memory model on 80x86
- * machines, we can't just allocate the histogram in one chunk.  Instead
- * of a true 3-D array, we use a row of pointers to 2-D arrays.  Each
- * pointer corresponds to a C0 value (typically 2^5 = 32 pointers) and
- * each 2-D array has 2^6*2^5 = 2048 or 2^6*2^6 = 4096 entries.  Note that
- * on 80x86 machines, the pointer row is in near memory but the actual
- * arrays are in far memory (same arrangement as we use for image arrays).
- */
-
-#define MAXNUMCOLORS  (MAXJSAMPLE+1) /* maximum size of colormap */
-
-/* These will do the right thing for either R,G,B or B,G,R color order,
- * but you may not like the results for other color orders.
- */
-#define HIST_C0_BITS  5		/* bits of precision in R/B histogram */
-#define HIST_C1_BITS  6		/* bits of precision in G histogram */
-#define HIST_C2_BITS  5		/* bits of precision in B/R histogram */
-
-/* Number of elements along histogram axes. */
-#define HIST_C0_ELEMS  (1<<HIST_C0_BITS)
-#define HIST_C1_ELEMS  (1<<HIST_C1_BITS)
-#define HIST_C2_ELEMS  (1<<HIST_C2_BITS)
-
-/* These are the amounts to shift an input value to get a histogram index. */
-#define C0_SHIFT  (BITS_IN_JSAMPLE-HIST_C0_BITS)
-#define C1_SHIFT  (BITS_IN_JSAMPLE-HIST_C1_BITS)
-#define C2_SHIFT  (BITS_IN_JSAMPLE-HIST_C2_BITS)
-
-
-typedef UINT16 histcell;	/* histogram cell; prefer an unsigned type */
-
-typedef histcell FAR * histptr;	/* for pointers to histogram cells */
-
-typedef histcell hist1d[HIST_C2_ELEMS]; /* typedefs for the array */
-typedef hist1d FAR * hist2d;	/* type for the 2nd-level pointers */
-typedef hist2d * hist3d;	/* type for top-level pointer */
-
-
-/* Declarations for Floyd-Steinberg dithering.
- *
- * Errors are accumulated into the array fserrors[], at a resolution of
- * 1/16th of a pixel count.  The error at a given pixel is propagated
- * to its not-yet-processed neighbors using the standard F-S fractions,
- *		...	(here)	7/16
- *		3/16	5/16	1/16
- * We work left-to-right on even rows, right-to-left on odd rows.
- *
- * We can get away with a single array (holding one row's worth of errors)
- * by using it to store the current row's errors at pixel columns not yet
- * processed, but the next row's errors at columns already processed.  We
- * need only a few extra variables to hold the errors immediately around the
- * current column.  (If we are lucky, those variables are in registers, but
- * even if not, they're probably cheaper to access than array elements are.)
- *
- * The fserrors[] array has (#columns + 2) entries; the extra entry at
- * each end saves us from special-casing the first and last pixels.
- * Each entry is three values long, one value for each color component.
- *
- * Note: on a wide image, we might not have enough room in a PC's near data
- * segment to hold the error array; so it is allocated with alloc_large.
- */
-
-#if BITS_IN_JSAMPLE == 8
-typedef INT16 FSERROR;		/* 16 bits should be enough */
-typedef int LOCFSERROR;		/* use 'int' for calculation temps */
-#else
-typedef INT32 FSERROR;		/* may need more than 16 bits */
-typedef INT32 LOCFSERROR;	/* be sure calculation temps are big enough */
-#endif
-
-typedef FSERROR FAR *FSERRPTR;	/* pointer to error array (in FAR storage!) */
-
-
-/* Private subobject */
-
-typedef struct {
-  struct jpeg_color_quantizer pub; /* public fields */
-
-  /* Space for the eventually created colormap is stashed here */
-  JSAMPARRAY sv_colormap;	/* colormap allocated at init time */
-  int desired;			/* desired # of colors = size of colormap */
-
-  /* Variables for accumulating image statistics */
-  hist3d histogram;		/* pointer to the histogram */
-
-  boolean needs_zeroed;		/* TRUE if next pass must zero histogram */
-
-  /* Variables for Floyd-Steinberg dithering */
-  FSERRPTR fserrors;		/* accumulated errors */
-  boolean on_odd_row;		/* flag to remember which row we are on */
-  int * error_limiter;		/* table for clamping the applied error */
-} my_cquantizer;
-
-typedef my_cquantizer * my_cquantize_ptr;
-
-
-/*
- * Prescan some rows of pixels.
- * In this module the prescan simply updates the histogram, which has been
- * initialized to zeroes by start_pass.
- * An output_buf parameter is required by the method signature, but no data
- * is actually output (in fact the buffer controller is probably passing a
- * NULL pointer).
- */
-
-METHODDEF(void)
-prescan_quantize (j_decompress_ptr cinfo, JSAMPARRAY input_buf,
-		  JSAMPARRAY output_buf, int num_rows)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  JSAMPROW ptr;
-  histptr histp;
-  hist3d histogram = cquantize->histogram;
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-
-  for (row = 0; row < num_rows; row++) {
-    ptr = input_buf[row];
-    for (col = width; col > 0; col--) {
-      /* get pixel value and index into the histogram */
-      histp = & histogram[GETJSAMPLE(ptr[0]) >> C0_SHIFT]
-			 [GETJSAMPLE(ptr[1]) >> C1_SHIFT]
-			 [GETJSAMPLE(ptr[2]) >> C2_SHIFT];
-      /* increment, check for overflow and undo increment if so. */
-      if (++(*histp) <= 0)
-	(*histp)--;
-      ptr += 3;
-    }
-  }
-}
-
-
-/*
- * Next we have the really interesting routines: selection of a colormap
- * given the completed histogram.
- * These routines work with a list of "boxes", each representing a rectangular
- * subset of the input color space (to histogram precision).
- */
-
-typedef struct {
-  /* The bounds of the box (inclusive); expressed as histogram indexes */
-  int c0min, c0max;
-  int c1min, c1max;
-  int c2min, c2max;
-  /* The volume (actually 2-norm) of the box */
-  INT32 volume;
-  /* The number of nonzero histogram cells within this box */
-  long colorcount;
-} box;
-
-typedef box * boxptr;
-
-
-LOCAL(boxptr)
-find_biggest_color_pop (boxptr boxlist, int numboxes)
-/* Find the splittable box with the largest color population */
-/* Returns NULL if no splittable boxes remain */
-{
-  boxptr boxp;
-  int i;
-  long maxc = 0;
-  boxptr which = NULL;
-  
-  for (i = 0, boxp = boxlist; i < numboxes; i++, boxp++) {
-    if (boxp->colorcount > maxc && boxp->volume > 0) {
-      which = boxp;
-      maxc = boxp->colorcount;
-    }
-  }
-  return which;
-}
-
-
-LOCAL(boxptr)
-find_biggest_volume (boxptr boxlist, int numboxes)
-/* Find the splittable box with the largest (scaled) volume */
-/* Returns NULL if no splittable boxes remain */
-{
-  boxptr boxp;
-  int i;
-  INT32 maxv = 0;
-  boxptr which = NULL;
-  
-  for (i = 0, boxp = boxlist; i < numboxes; i++, boxp++) {
-    if (boxp->volume > maxv) {
-      which = boxp;
-      maxv = boxp->volume;
-    }
-  }
-  return which;
-}
-
-
-LOCAL(void)
-update_box (j_decompress_ptr cinfo, boxptr boxp)
-/* Shrink the min/max bounds of a box to enclose only nonzero elements, */
-/* and recompute its volume and population */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  histptr histp;
-  int c0,c1,c2;
-  int c0min,c0max,c1min,c1max,c2min,c2max;
-  INT32 dist0,dist1,dist2;
-  long ccount;
-  
-  c0min = boxp->c0min;  c0max = boxp->c0max;
-  c1min = boxp->c1min;  c1max = boxp->c1max;
-  c2min = boxp->c2min;  c2max = boxp->c2max;
-  
-  if (c0max > c0min)
-    for (c0 = c0min; c0 <= c0max; c0++)
-      for (c1 = c1min; c1 <= c1max; c1++) {
-	histp = & histogram[c0][c1][c2min];
-	for (c2 = c2min; c2 <= c2max; c2++)
-	  if (*histp++ != 0) {
-	    boxp->c0min = c0min = c0;
-	    goto have_c0min;
-	  }
-      }
- have_c0min:
-  if (c0max > c0min)
-    for (c0 = c0max; c0 >= c0min; c0--)
-      for (c1 = c1min; c1 <= c1max; c1++) {
-	histp = & histogram[c0][c1][c2min];
-	for (c2 = c2min; c2 <= c2max; c2++)
-	  if (*histp++ != 0) {
-	    boxp->c0max = c0max = c0;
-	    goto have_c0max;
-	  }
-      }
- have_c0max:
-  if (c1max > c1min)
-    for (c1 = c1min; c1 <= c1max; c1++)
-      for (c0 = c0min; c0 <= c0max; c0++) {
-	histp = & histogram[c0][c1][c2min];
-	for (c2 = c2min; c2 <= c2max; c2++)
-	  if (*histp++ != 0) {
-	    boxp->c1min = c1min = c1;
-	    goto have_c1min;
-	  }
-      }
- have_c1min:
-  if (c1max > c1min)
-    for (c1 = c1max; c1 >= c1min; c1--)
-      for (c0 = c0min; c0 <= c0max; c0++) {
-	histp = & histogram[c0][c1][c2min];
-	for (c2 = c2min; c2 <= c2max; c2++)
-	  if (*histp++ != 0) {
-	    boxp->c1max = c1max = c1;
-	    goto have_c1max;
-	  }
-      }
- have_c1max:
-  if (c2max > c2min)
-    for (c2 = c2min; c2 <= c2max; c2++)
-      for (c0 = c0min; c0 <= c0max; c0++) {
-	histp = & histogram[c0][c1min][c2];
-	for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
-	  if (*histp != 0) {
-	    boxp->c2min = c2min = c2;
-	    goto have_c2min;
-	  }
-      }
- have_c2min:
-  if (c2max > c2min)
-    for (c2 = c2max; c2 >= c2min; c2--)
-      for (c0 = c0min; c0 <= c0max; c0++) {
-	histp = & histogram[c0][c1min][c2];
-	for (c1 = c1min; c1 <= c1max; c1++, histp += HIST_C2_ELEMS)
-	  if (*histp != 0) {
-	    boxp->c2max = c2max = c2;
-	    goto have_c2max;
-	  }
-      }
- have_c2max:
-
-  /* Update box volume.
-   * We use 2-norm rather than real volume here; this biases the method
-   * against making long narrow boxes, and it has the side benefit that
-   * a box is splittable iff norm > 0.
-   * Since the differences are expressed in histogram-cell units,
-   * we have to shift back to JSAMPLE units to get consistent distances;
-   * after which, we scale according to the selected distance scale factors.
-   */
-  dist0 = ((c0max - c0min) << C0_SHIFT) * C0_SCALE;
-  dist1 = ((c1max - c1min) << C1_SHIFT) * C1_SCALE;
-  dist2 = ((c2max - c2min) << C2_SHIFT) * C2_SCALE;
-  boxp->volume = dist0*dist0 + dist1*dist1 + dist2*dist2;
-  
-  /* Now scan remaining volume of box and compute population */
-  ccount = 0;
-  for (c0 = c0min; c0 <= c0max; c0++)
-    for (c1 = c1min; c1 <= c1max; c1++) {
-      histp = & histogram[c0][c1][c2min];
-      for (c2 = c2min; c2 <= c2max; c2++, histp++)
-	if (*histp != 0) {
-	  ccount++;
-	}
-    }
-  boxp->colorcount = ccount;
-}
-
-
-LOCAL(int)
-median_cut (j_decompress_ptr cinfo, boxptr boxlist, int numboxes,
-	    int desired_colors)
-/* Repeatedly select and split the largest box until we have enough boxes */
-{
-  int n,lb;
-  int c0,c1,c2,cmax;
-  boxptr b1,b2;
-
-  while (numboxes < desired_colors) {
-    /* Select box to split.
-     * Current algorithm: by population for first half, then by volume.
-     */
-    if (numboxes*2 <= desired_colors) {
-      b1 = find_biggest_color_pop(boxlist, numboxes);
-    } else {
-      b1 = find_biggest_volume(boxlist, numboxes);
-    }
-    if (b1 == NULL)		/* no splittable boxes left! */
-      break;
-    b2 = &boxlist[numboxes];	/* where new box will go */
-    /* Copy the color bounds to the new box. */
-    b2->c0max = b1->c0max; b2->c1max = b1->c1max; b2->c2max = b1->c2max;
-    b2->c0min = b1->c0min; b2->c1min = b1->c1min; b2->c2min = b1->c2min;
-    /* Choose which axis to split the box on.
-     * Current algorithm: longest scaled axis.
-     * See notes in update_box about scaling distances.
-     */
-    c0 = ((b1->c0max - b1->c0min) << C0_SHIFT) * C0_SCALE;
-    c1 = ((b1->c1max - b1->c1min) << C1_SHIFT) * C1_SCALE;
-    c2 = ((b1->c2max - b1->c2min) << C2_SHIFT) * C2_SCALE;
-    /* We want to break any ties in favor of green, then red, blue last.
-     * This code does the right thing for R,G,B or B,G,R color orders only.
-     */
-#if RGB_RED == 0
-    cmax = c1; n = 1;
-    if (c0 > cmax) { cmax = c0; n = 0; }
-    if (c2 > cmax) { n = 2; }
-#else
-    cmax = c1; n = 1;
-    if (c2 > cmax) { cmax = c2; n = 2; }
-    if (c0 > cmax) { n = 0; }
-#endif
-    /* Choose split point along selected axis, and update box bounds.
-     * Current algorithm: split at halfway point.
-     * (Since the box has been shrunk to minimum volume,
-     * any split will produce two nonempty subboxes.)
-     * Note that lb value is max for lower box, so must be < old max.
-     */
-    switch (n) {
-    case 0:
-      lb = (b1->c0max + b1->c0min) / 2;
-      b1->c0max = lb;
-      b2->c0min = lb+1;
-      break;
-    case 1:
-      lb = (b1->c1max + b1->c1min) / 2;
-      b1->c1max = lb;
-      b2->c1min = lb+1;
-      break;
-    case 2:
-      lb = (b1->c2max + b1->c2min) / 2;
-      b1->c2max = lb;
-      b2->c2min = lb+1;
-      break;
-    }
-    /* Update stats for boxes */
-    update_box(cinfo, b1);
-    update_box(cinfo, b2);
-    numboxes++;
-  }
-  return numboxes;
-}
-
-
-LOCAL(void)
-compute_color (j_decompress_ptr cinfo, boxptr boxp, int icolor)
-/* Compute representative color for a box, put it in colormap[icolor] */
-{
-  /* Current algorithm: mean weighted by pixels (not colors) */
-  /* Note it is important to get the rounding correct! */
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  histptr histp;
-  int c0,c1,c2;
-  int c0min,c0max,c1min,c1max,c2min,c2max;
-  long count;
-  long total = 0;
-  long c0total = 0;
-  long c1total = 0;
-  long c2total = 0;
-  
-  c0min = boxp->c0min;  c0max = boxp->c0max;
-  c1min = boxp->c1min;  c1max = boxp->c1max;
-  c2min = boxp->c2min;  c2max = boxp->c2max;
-  
-  for (c0 = c0min; c0 <= c0max; c0++)
-    for (c1 = c1min; c1 <= c1max; c1++) {
-      histp = & histogram[c0][c1][c2min];
-      for (c2 = c2min; c2 <= c2max; c2++) {
-	if ((count = *histp++) != 0) {
-	  total += count;
-	  c0total += ((c0 << C0_SHIFT) + ((1<<C0_SHIFT)>>1)) * count;
-	  c1total += ((c1 << C1_SHIFT) + ((1<<C1_SHIFT)>>1)) * count;
-	  c2total += ((c2 << C2_SHIFT) + ((1<<C2_SHIFT)>>1)) * count;
-	}
-      }
-    }
-  
-  cinfo->colormap[0][icolor] = (JSAMPLE) ((c0total + (total>>1)) / total);
-  cinfo->colormap[1][icolor] = (JSAMPLE) ((c1total + (total>>1)) / total);
-  cinfo->colormap[2][icolor] = (JSAMPLE) ((c2total + (total>>1)) / total);
-}
-
-
-LOCAL(void)
-select_colors (j_decompress_ptr cinfo, int desired_colors)
-/* Master routine for color selection */
-{
-  boxptr boxlist;
-  int numboxes;
-  int i;
-
-  /* Allocate workspace for box list */
-  boxlist = (boxptr) (*cinfo->mem->alloc_small)
-    ((j_common_ptr) cinfo, JPOOL_IMAGE, desired_colors * SIZEOF(box));
-  /* Initialize one box containing whole space */
-  numboxes = 1;
-  boxlist[0].c0min = 0;
-  boxlist[0].c0max = MAXJSAMPLE >> C0_SHIFT;
-  boxlist[0].c1min = 0;
-  boxlist[0].c1max = MAXJSAMPLE >> C1_SHIFT;
-  boxlist[0].c2min = 0;
-  boxlist[0].c2max = MAXJSAMPLE >> C2_SHIFT;
-  /* Shrink it to actually-used volume and set its statistics */
-  update_box(cinfo, & boxlist[0]);
-  /* Perform median-cut to produce final box list */
-  numboxes = median_cut(cinfo, boxlist, numboxes, desired_colors);
-  /* Compute the representative color for each box, fill colormap */
-  for (i = 0; i < numboxes; i++)
-    compute_color(cinfo, & boxlist[i], i);
-  cinfo->actual_number_of_colors = numboxes;
-  TRACEMS1(cinfo, 1, JTRC_QUANT_SELECTED, numboxes);
-}
-
-
-/*
- * These routines are concerned with the time-critical task of mapping input
- * colors to the nearest color in the selected colormap.
- *
- * We re-use the histogram space as an "inverse color map", essentially a
- * cache for the results of nearest-color searches.  All colors within a
- * histogram cell will be mapped to the same colormap entry, namely the one
- * closest to the cell's center.  This may not be quite the closest entry to
- * the actual input color, but it's almost as good.  A zero in the cache
- * indicates we haven't found the nearest color for that cell yet; the array
- * is cleared to zeroes before starting the mapping pass.  When we find the
- * nearest color for a cell, its colormap index plus one is recorded in the
- * cache for future use.  The pass2 scanning routines call fill_inverse_cmap
- * when they need to use an unfilled entry in the cache.
- *
- * Our method of efficiently finding nearest colors is based on the "locally
- * sorted search" idea described by Heckbert and on the incremental distance
- * calculation described by Spencer W. Thomas in chapter III.1 of Graphics
- * Gems II (James Arvo, ed.  Academic Press, 1991).  Thomas points out that
- * the distances from a given colormap entry to each cell of the histogram can
- * be computed quickly using an incremental method: the differences between
- * distances to adjacent cells themselves differ by a constant.  This allows a
- * fairly fast implementation of the "brute force" approach of computing the
- * distance from every colormap entry to every histogram cell.  Unfortunately,
- * it needs a work array to hold the best-distance-so-far for each histogram
- * cell (because the inner loop has to be over cells, not colormap entries).
- * The work array elements have to be INT32s, so the work array would need
- * 256Kb at our recommended precision.  This is not feasible in DOS machines.
- *
- * To get around these problems, we apply Thomas' method to compute the
- * nearest colors for only the cells within a small subbox of the histogram.
- * The work array need be only as big as the subbox, so the memory usage
- * problem is solved.  Furthermore, we need not fill subboxes that are never
- * referenced in pass2; many images use only part of the color gamut, so a
- * fair amount of work is saved.  An additional advantage of this
- * approach is that we can apply Heckbert's locality criterion to quickly
- * eliminate colormap entries that are far away from the subbox; typically
- * three-fourths of the colormap entries are rejected by Heckbert's criterion,
- * and we need not compute their distances to individual cells in the subbox.
- * The speed of this approach is heavily influenced by the subbox size: too
- * small means too much overhead, too big loses because Heckbert's criterion
- * can't eliminate as many colormap entries.  Empirically the best subbox
- * size seems to be about 1/512th of the histogram (1/8th in each direction).
- *
- * Thomas' article also describes a refined method which is asymptotically
- * faster than the brute-force method, but it is also far more complex and
- * cannot efficiently be applied to small subboxes.  It is therefore not
- * useful for programs intended to be portable to DOS machines.  On machines
- * with plenty of memory, filling the whole histogram in one shot with Thomas'
- * refined method might be faster than the present code --- but then again,
- * it might not be any faster, and it's certainly more complicated.
- */
-
-
-/* log2(histogram cells in update box) for each axis; this can be adjusted */
-#define BOX_C0_LOG  (HIST_C0_BITS-3)
-#define BOX_C1_LOG  (HIST_C1_BITS-3)
-#define BOX_C2_LOG  (HIST_C2_BITS-3)
-
-#define BOX_C0_ELEMS  (1<<BOX_C0_LOG) /* # of hist cells in update box */
-#define BOX_C1_ELEMS  (1<<BOX_C1_LOG)
-#define BOX_C2_ELEMS  (1<<BOX_C2_LOG)
-
-#define BOX_C0_SHIFT  (C0_SHIFT + BOX_C0_LOG)
-#define BOX_C1_SHIFT  (C1_SHIFT + BOX_C1_LOG)
-#define BOX_C2_SHIFT  (C2_SHIFT + BOX_C2_LOG)
-
-
-/*
- * The next three routines implement inverse colormap filling.  They could
- * all be folded into one big routine, but splitting them up this way saves
- * some stack space (the mindist[] and bestdist[] arrays need not coexist)
- * and may allow some compilers to produce better code by registerizing more
- * inner-loop variables.
- */
-
-LOCAL(int)
-find_nearby_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
-		    JSAMPLE colorlist[])
-/* Locate the colormap entries close enough to an update box to be candidates
- * for the nearest entry to some cell(s) in the update box.  The update box
- * is specified by the center coordinates of its first cell.  The number of
- * candidate colormap entries is returned, and their colormap indexes are
- * placed in colorlist[].
- * This routine uses Heckbert's "locally sorted search" criterion to select
- * the colors that need further consideration.
- */
-{
-  int numcolors = cinfo->actual_number_of_colors;
-  int maxc0, maxc1, maxc2;
-  int centerc0, centerc1, centerc2;
-  int i, x, ncolors;
-  INT32 minmaxdist, min_dist, max_dist, tdist;
-  INT32 mindist[MAXNUMCOLORS];	/* min distance to colormap entry i */
-
-  /* Compute true coordinates of update box's upper corner and center.
-   * Actually we compute the coordinates of the center of the upper-corner
-   * histogram cell, which are the upper bounds of the volume we care about.
-   * Note that since ">>" rounds down, the "center" values may be closer to
-   * min than to max; hence comparisons to them must be "<=", not "<".
-   */
-  maxc0 = minc0 + ((1 << BOX_C0_SHIFT) - (1 << C0_SHIFT));
-  centerc0 = (minc0 + maxc0) >> 1;
-  maxc1 = minc1 + ((1 << BOX_C1_SHIFT) - (1 << C1_SHIFT));
-  centerc1 = (minc1 + maxc1) >> 1;
-  maxc2 = minc2 + ((1 << BOX_C2_SHIFT) - (1 << C2_SHIFT));
-  centerc2 = (minc2 + maxc2) >> 1;
-
-  /* For each color in colormap, find:
-   *  1. its minimum squared-distance to any point in the update box
-   *     (zero if color is within update box);
-   *  2. its maximum squared-distance to any point in the update box.
-   * Both of these can be found by considering only the corners of the box.
-   * We save the minimum distance for each color in mindist[];
-   * only the smallest maximum distance is of interest.
-   */
-  minmaxdist = 0x7FFFFFFFL;
-
-  for (i = 0; i < numcolors; i++) {
-    /* We compute the squared-c0-distance term, then add in the other two. */
-    x = GETJSAMPLE(cinfo->colormap[0][i]);
-    if (x < minc0) {
-      tdist = (x - minc0) * C0_SCALE;
-      min_dist = tdist*tdist;
-      tdist = (x - maxc0) * C0_SCALE;
-      max_dist = tdist*tdist;
-    } else if (x > maxc0) {
-      tdist = (x - maxc0) * C0_SCALE;
-      min_dist = tdist*tdist;
-      tdist = (x - minc0) * C0_SCALE;
-      max_dist = tdist*tdist;
-    } else {
-      /* within cell range so no contribution to min_dist */
-      min_dist = 0;
-      if (x <= centerc0) {
-	tdist = (x - maxc0) * C0_SCALE;
-	max_dist = tdist*tdist;
-      } else {
-	tdist = (x - minc0) * C0_SCALE;
-	max_dist = tdist*tdist;
-      }
-    }
-
-    x = GETJSAMPLE(cinfo->colormap[1][i]);
-    if (x < minc1) {
-      tdist = (x - minc1) * C1_SCALE;
-      min_dist += tdist*tdist;
-      tdist = (x - maxc1) * C1_SCALE;
-      max_dist += tdist*tdist;
-    } else if (x > maxc1) {
-      tdist = (x - maxc1) * C1_SCALE;
-      min_dist += tdist*tdist;
-      tdist = (x - minc1) * C1_SCALE;
-      max_dist += tdist*tdist;
-    } else {
-      /* within cell range so no contribution to min_dist */
-      if (x <= centerc1) {
-	tdist = (x - maxc1) * C1_SCALE;
-	max_dist += tdist*tdist;
-      } else {
-	tdist = (x - minc1) * C1_SCALE;
-	max_dist += tdist*tdist;
-      }
-    }
-
-    x = GETJSAMPLE(cinfo->colormap[2][i]);
-    if (x < minc2) {
-      tdist = (x - minc2) * C2_SCALE;
-      min_dist += tdist*tdist;
-      tdist = (x - maxc2) * C2_SCALE;
-      max_dist += tdist*tdist;
-    } else if (x > maxc2) {
-      tdist = (x - maxc2) * C2_SCALE;
-      min_dist += tdist*tdist;
-      tdist = (x - minc2) * C2_SCALE;
-      max_dist += tdist*tdist;
-    } else {
-      /* within cell range so no contribution to min_dist */
-      if (x <= centerc2) {
-	tdist = (x - maxc2) * C2_SCALE;
-	max_dist += tdist*tdist;
-      } else {
-	tdist = (x - minc2) * C2_SCALE;
-	max_dist += tdist*tdist;
-      }
-    }
-
-    mindist[i] = min_dist;	/* save away the results */
-    if (max_dist < minmaxdist)
-      minmaxdist = max_dist;
-  }
-
-  /* Now we know that no cell in the update box is more than minmaxdist
-   * away from some colormap entry.  Therefore, only colors that are
-   * within minmaxdist of some part of the box need be considered.
-   */
-  ncolors = 0;
-  for (i = 0; i < numcolors; i++) {
-    if (mindist[i] <= minmaxdist)
-      colorlist[ncolors++] = (JSAMPLE) i;
-  }
-  return ncolors;
-}
-
-
-LOCAL(void)
-find_best_colors (j_decompress_ptr cinfo, int minc0, int minc1, int minc2,
-		  int numcolors, JSAMPLE colorlist[], JSAMPLE bestcolor[])
-/* Find the closest colormap entry for each cell in the update box,
- * given the list of candidate colors prepared by find_nearby_colors.
- * Return the indexes of the closest entries in the bestcolor[] array.
- * This routine uses Thomas' incremental distance calculation method to
- * find the distance from a colormap entry to successive cells in the box.
- */
-{
-  int ic0, ic1, ic2;
-  int i, icolor;
-  INT32 * bptr;	/* pointer into bestdist[] array */
-  JSAMPLE * cptr;		/* pointer into bestcolor[] array */
-  INT32 dist0, dist1;		/* initial distance values */
-  INT32 dist2;		/* current distance in inner loop */
-  INT32 xx0, xx1;		/* distance increments */
-  INT32 xx2;
-  INT32 inc0, inc1, inc2;	/* initial values for increments */
-  /* This array holds the distance to the nearest-so-far color for each cell */
-  INT32 bestdist[BOX_C0_ELEMS * BOX_C1_ELEMS * BOX_C2_ELEMS];
-
-  /* Initialize best-distance for each cell of the update box */
-  bptr = bestdist;
-  for (i = BOX_C0_ELEMS*BOX_C1_ELEMS*BOX_C2_ELEMS-1; i >= 0; i--)
-    *bptr++ = 0x7FFFFFFFL;
-  
-  /* For each color selected by find_nearby_colors,
-   * compute its distance to the center of each cell in the box.
-   * If that's less than best-so-far, update best distance and color number.
-   */
-  
-  /* Nominal steps between cell centers ("x" in Thomas article) */
-#define STEP_C0  ((1 << C0_SHIFT) * C0_SCALE)
-#define STEP_C1  ((1 << C1_SHIFT) * C1_SCALE)
-#define STEP_C2  ((1 << C2_SHIFT) * C2_SCALE)
-  
-  for (i = 0; i < numcolors; i++) {
-    icolor = GETJSAMPLE(colorlist[i]);
-    /* Compute (square of) distance from minc0/c1/c2 to this color */
-    inc0 = (minc0 - GETJSAMPLE(cinfo->colormap[0][icolor])) * C0_SCALE;
-    dist0 = inc0*inc0;
-    inc1 = (minc1 - GETJSAMPLE(cinfo->colormap[1][icolor])) * C1_SCALE;
-    dist0 += inc1*inc1;
-    inc2 = (minc2 - GETJSAMPLE(cinfo->colormap[2][icolor])) * C2_SCALE;
-    dist0 += inc2*inc2;
-    /* Form the initial difference increments */
-    inc0 = inc0 * (2 * STEP_C0) + STEP_C0 * STEP_C0;
-    inc1 = inc1 * (2 * STEP_C1) + STEP_C1 * STEP_C1;
-    inc2 = inc2 * (2 * STEP_C2) + STEP_C2 * STEP_C2;
-    /* Now loop over all cells in box, updating distance per Thomas method */
-    bptr = bestdist;
-    cptr = bestcolor;
-    xx0 = inc0;
-    for (ic0 = BOX_C0_ELEMS-1; ic0 >= 0; ic0--) {
-      dist1 = dist0;
-      xx1 = inc1;
-      for (ic1 = BOX_C1_ELEMS-1; ic1 >= 0; ic1--) {
-	dist2 = dist1;
-	xx2 = inc2;
-	for (ic2 = BOX_C2_ELEMS-1; ic2 >= 0; ic2--) {
-	  if (dist2 < *bptr) {
-	    *bptr = dist2;
-	    *cptr = (JSAMPLE) icolor;
-	  }
-	  dist2 += xx2;
-	  xx2 += 2 * STEP_C2 * STEP_C2;
-	  bptr++;
-	  cptr++;
-	}
-	dist1 += xx1;
-	xx1 += 2 * STEP_C1 * STEP_C1;
-      }
-      dist0 += xx0;
-      xx0 += 2 * STEP_C0 * STEP_C0;
-    }
-  }
-}
-
-
-LOCAL(void)
-fill_inverse_cmap (j_decompress_ptr cinfo, int c0, int c1, int c2)
-/* Fill the inverse-colormap entries in the update box that contains */
-/* histogram cell c0/c1/c2.  (Only that one cell MUST be filled, but */
-/* we can fill as many others as we wish.) */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  int minc0, minc1, minc2;	/* lower left corner of update box */
-  int ic0, ic1, ic2;
-  JSAMPLE * cptr;	/* pointer into bestcolor[] array */
-  histptr cachep;	/* pointer into main cache array */
-  /* This array lists the candidate colormap indexes. */
-  JSAMPLE colorlist[MAXNUMCOLORS];
-  int numcolors;		/* number of candidate colors */
-  /* This array holds the actually closest colormap index for each cell. */
-  JSAMPLE bestcolor[BOX_C0_ELEMS * BOX_C1_ELEMS * BOX_C2_ELEMS];
-
-  /* Convert cell coordinates to update box ID */
-  c0 >>= BOX_C0_LOG;
-  c1 >>= BOX_C1_LOG;
-  c2 >>= BOX_C2_LOG;
-
-  /* Compute true coordinates of update box's origin corner.
-   * Actually we compute the coordinates of the center of the corner
-   * histogram cell, which are the lower bounds of the volume we care about.
-   */
-  minc0 = (c0 << BOX_C0_SHIFT) + ((1 << C0_SHIFT) >> 1);
-  minc1 = (c1 << BOX_C1_SHIFT) + ((1 << C1_SHIFT) >> 1);
-  minc2 = (c2 << BOX_C2_SHIFT) + ((1 << C2_SHIFT) >> 1);
-  
-  /* Determine which colormap entries are close enough to be candidates
-   * for the nearest entry to some cell in the update box.
-   */
-  numcolors = find_nearby_colors(cinfo, minc0, minc1, minc2, colorlist);
-
-  /* Determine the actually nearest colors. */
-  find_best_colors(cinfo, minc0, minc1, minc2, numcolors, colorlist,
-		   bestcolor);
-
-  /* Save the best color numbers (plus 1) in the main cache array */
-  c0 <<= BOX_C0_LOG;		/* convert ID back to base cell indexes */
-  c1 <<= BOX_C1_LOG;
-  c2 <<= BOX_C2_LOG;
-  cptr = bestcolor;
-  for (ic0 = 0; ic0 < BOX_C0_ELEMS; ic0++) {
-    for (ic1 = 0; ic1 < BOX_C1_ELEMS; ic1++) {
-      cachep = & histogram[c0+ic0][c1+ic1][c2];
-      for (ic2 = 0; ic2 < BOX_C2_ELEMS; ic2++) {
-	*cachep++ = (histcell) (GETJSAMPLE(*cptr++) + 1);
-      }
-    }
-  }
-}
-
-
-/*
- * Map some rows of pixels to the output colormapped representation.
- */
-
-METHODDEF(void)
-pass2_no_dither (j_decompress_ptr cinfo,
-		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
-/* This version performs no dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  JSAMPROW inptr, outptr;
-  histptr cachep;
-  int c0, c1, c2;
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-
-  for (row = 0; row < num_rows; row++) {
-    inptr = input_buf[row];
-    outptr = output_buf[row];
-    for (col = width; col > 0; col--) {
-      /* get pixel value and index into the cache */
-      c0 = GETJSAMPLE(*inptr++) >> C0_SHIFT;
-      c1 = GETJSAMPLE(*inptr++) >> C1_SHIFT;
-      c2 = GETJSAMPLE(*inptr++) >> C2_SHIFT;
-      cachep = & histogram[c0][c1][c2];
-      /* If we have not seen this color before, find nearest colormap entry */
-      /* and update the cache */
-      if (*cachep == 0)
-	fill_inverse_cmap(cinfo, c0,c1,c2);
-      /* Now emit the colormap index for this cell */
-      *outptr++ = (JSAMPLE) (*cachep - 1);
-    }
-  }
-}
-
-
-METHODDEF(void)
-pass2_fs_dither (j_decompress_ptr cinfo,
-		 JSAMPARRAY input_buf, JSAMPARRAY output_buf, int num_rows)
-/* This version performs Floyd-Steinberg dithering */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  LOCFSERROR cur0, cur1, cur2;	/* current error or pixel value */
-  LOCFSERROR belowerr0, belowerr1, belowerr2; /* error for pixel below cur */
-  LOCFSERROR bpreverr0, bpreverr1, bpreverr2; /* error for below/prev col */
-  FSERRPTR errorptr;	/* => fserrors[] at column before current */
-  JSAMPROW inptr;		/* => current input pixel */
-  JSAMPROW outptr;		/* => current output pixel */
-  histptr cachep;
-  int dir;			/* +1 or -1 depending on direction */
-  int dir3;			/* 3*dir, for advancing inptr & errorptr */
-  int row;
-  JDIMENSION col;
-  JDIMENSION width = cinfo->output_width;
-  JSAMPLE *range_limit = cinfo->sample_range_limit;
-  int *error_limit = cquantize->error_limiter;
-  JSAMPROW colormap0 = cinfo->colormap[0];
-  JSAMPROW colormap1 = cinfo->colormap[1];
-  JSAMPROW colormap2 = cinfo->colormap[2];
-  SHIFT_TEMPS
-
-  for (row = 0; row < num_rows; row++) {
-    inptr = input_buf[row];
-    outptr = output_buf[row];
-    if (cquantize->on_odd_row) {
-      /* work right to left in this row */
-      inptr += (width-1) * 3;	/* so point to rightmost pixel */
-      outptr += width-1;
-      dir = -1;
-      dir3 = -3;
-      errorptr = cquantize->fserrors + (width+1)*3; /* => entry after last column */
-      cquantize->on_odd_row = FALSE; /* flip for next time */
-    } else {
-      /* work left to right in this row */
-      dir = 1;
-      dir3 = 3;
-      errorptr = cquantize->fserrors; /* => entry before first real column */
-      cquantize->on_odd_row = TRUE; /* flip for next time */
-    }
-    /* Preset error values: no error propagated to first pixel from left */
-    cur0 = cur1 = cur2 = 0;
-    /* and no error propagated to row below yet */
-    belowerr0 = belowerr1 = belowerr2 = 0;
-    bpreverr0 = bpreverr1 = bpreverr2 = 0;
-
-    for (col = width; col > 0; col--) {
-      /* curN holds the error propagated from the previous pixel on the
-       * current line.  Add the error propagated from the previous line
-       * to form the complete error correction term for this pixel, and
-       * round the error term (which is expressed * 16) to an integer.
-       * RIGHT_SHIFT rounds towards minus infinity, so adding 8 is correct
-       * for either sign of the error value.
-       * Note: errorptr points to *previous* column's array entry.
-       */
-      cur0 = RIGHT_SHIFT(cur0 + errorptr[dir3+0] + 8, 4);
-      cur1 = RIGHT_SHIFT(cur1 + errorptr[dir3+1] + 8, 4);
-      cur2 = RIGHT_SHIFT(cur2 + errorptr[dir3+2] + 8, 4);
-      /* Limit the error using transfer function set by init_error_limit.
-       * See comments with init_error_limit for rationale.
-       */
-      cur0 = error_limit[cur0];
-      cur1 = error_limit[cur1];
-      cur2 = error_limit[cur2];
-      /* Form pixel value + error, and range-limit to 0..MAXJSAMPLE.
-       * The maximum error is +- MAXJSAMPLE (or less with error limiting);
-       * this sets the required size of the range_limit array.
-       */
-      cur0 += GETJSAMPLE(inptr[0]);
-      cur1 += GETJSAMPLE(inptr[1]);
-      cur2 += GETJSAMPLE(inptr[2]);
-      cur0 = GETJSAMPLE(range_limit[cur0]);
-      cur1 = GETJSAMPLE(range_limit[cur1]);
-      cur2 = GETJSAMPLE(range_limit[cur2]);
-      /* Index into the cache with adjusted pixel value */
-      cachep = & histogram[cur0>>C0_SHIFT][cur1>>C1_SHIFT][cur2>>C2_SHIFT];
-      /* If we have not seen this color before, find nearest colormap */
-      /* entry and update the cache */
-      if (*cachep == 0)
-	fill_inverse_cmap(cinfo, cur0>>C0_SHIFT,cur1>>C1_SHIFT,cur2>>C2_SHIFT);
-      /* Now emit the colormap index for this cell */
-      { int pixcode = *cachep - 1;
-	*outptr = (JSAMPLE) pixcode;
-	/* Compute representation error for this pixel */
-	cur0 -= GETJSAMPLE(colormap0[pixcode]);
-	cur1 -= GETJSAMPLE(colormap1[pixcode]);
-	cur2 -= GETJSAMPLE(colormap2[pixcode]);
-      }
-      /* Compute error fractions to be propagated to adjacent pixels.
-       * Add these into the running sums, and simultaneously shift the
-       * next-line error sums left by 1 column.
-       */
-      { LOCFSERROR bnexterr, delta;
-
-	bnexterr = cur0;	/* Process component 0 */
-	delta = cur0 * 2;
-	cur0 += delta;		/* form error * 3 */
-	errorptr[0] = (FSERROR) (bpreverr0 + cur0);
-	cur0 += delta;		/* form error * 5 */
-	bpreverr0 = belowerr0 + cur0;
-	belowerr0 = bnexterr;
-	cur0 += delta;		/* form error * 7 */
-	bnexterr = cur1;	/* Process component 1 */
-	delta = cur1 * 2;
-	cur1 += delta;		/* form error * 3 */
-	errorptr[1] = (FSERROR) (bpreverr1 + cur1);
-	cur1 += delta;		/* form error * 5 */
-	bpreverr1 = belowerr1 + cur1;
-	belowerr1 = bnexterr;
-	cur1 += delta;		/* form error * 7 */
-	bnexterr = cur2;	/* Process component 2 */
-	delta = cur2 * 2;
-	cur2 += delta;		/* form error * 3 */
-	errorptr[2] = (FSERROR) (bpreverr2 + cur2);
-	cur2 += delta;		/* form error * 5 */
-	bpreverr2 = belowerr2 + cur2;
-	belowerr2 = bnexterr;
-	cur2 += delta;		/* form error * 7 */
-      }
-      /* At this point curN contains the 7/16 error value to be propagated
-       * to the next pixel on the current line, and all the errors for the
-       * next line have been shifted over.  We are therefore ready to move on.
-       */
-      inptr += dir3;		/* Advance pixel pointers to next column */
-      outptr += dir;
-      errorptr += dir3;		/* advance errorptr to current column */
-    }
-    /* Post-loop cleanup: we must unload the final error values into the
-     * final fserrors[] entry.  Note we need not unload belowerrN because
-     * it is for the dummy column before or after the actual array.
-     */
-    errorptr[0] = (FSERROR) bpreverr0; /* unload prev errs into array */
-    errorptr[1] = (FSERROR) bpreverr1;
-    errorptr[2] = (FSERROR) bpreverr2;
-  }
-}
-
-
-/*
- * Initialize the error-limiting transfer function (lookup table).
- * The raw F-S error computation can potentially compute error values of up to
- * +- MAXJSAMPLE.  But we want the maximum correction applied to a pixel to be
- * much less, otherwise obviously wrong pixels will be created.  (Typical
- * effects include weird fringes at color-area boundaries, isolated bright
- * pixels in a dark area, etc.)  The standard advice for avoiding this problem
- * is to ensure that the "corners" of the color cube are allocated as output
- * colors; then repeated errors in the same direction cannot cause cascading
- * error buildup.  However, that only prevents the error from getting
- * completely out of hand; Aaron Giles reports that error limiting improves
- * the results even with corner colors allocated.
- * A simple clamping of the error values to about +- MAXJSAMPLE/8 works pretty
- * well, but the smoother transfer function used below is even better.  Thanks
- * to Aaron Giles for this idea.
- */
-
-LOCAL(void)
-init_error_limit (j_decompress_ptr cinfo)
-/* Allocate and fill in the error_limiter table */
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  int * table;
-  int in, out;
-
-  table = (int *) (*cinfo->mem->alloc_small)
-    ((j_common_ptr) cinfo, JPOOL_IMAGE, (MAXJSAMPLE*2+1) * SIZEOF(int));
-  table += MAXJSAMPLE;		/* so can index -MAXJSAMPLE .. +MAXJSAMPLE */
-  cquantize->error_limiter = table;
-
-#define STEPSIZE ((MAXJSAMPLE+1)/16)
-  /* Map errors 1:1 up to +- MAXJSAMPLE/16 */
-  out = 0;
-  for (in = 0; in < STEPSIZE; in++, out++) {
-    table[in] = out; table[-in] = -out;
-  }
-  /* Map errors 1:2 up to +- 3*MAXJSAMPLE/16 */
-  for (; in < STEPSIZE*3; in++, out += (in&1) ? 0 : 1) {
-    table[in] = out; table[-in] = -out;
-  }
-  /* Clamp the rest to final out value (which is (MAXJSAMPLE+1)/8) */
-  for (; in <= MAXJSAMPLE; in++) {
-    table[in] = out; table[-in] = -out;
-  }
-#undef STEPSIZE
-}
-
-
-/*
- * Finish up at the end of each pass.
- */
-
-METHODDEF(void)
-finish_pass1 (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-
-  /* Select the representative colors and fill in cinfo->colormap */
-  cinfo->colormap = cquantize->sv_colormap;
-  select_colors(cinfo, cquantize->desired);
-  /* Force next pass to zero the color index table */
-  cquantize->needs_zeroed = TRUE;
-}
-
-
-METHODDEF(void)
-finish_pass2 (j_decompress_ptr cinfo)
-{
-  /* no work */
-}
-
-
-/*
- * Initialize for each processing pass.
- */
-
-METHODDEF(void)
-start_pass_2_quant (j_decompress_ptr cinfo, boolean is_pre_scan)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-  hist3d histogram = cquantize->histogram;
-  int i;
-
-  /* Only F-S dithering or no dithering is supported. */
-  /* If user asks for ordered dither, give him F-S. */
-  if (cinfo->dither_mode != JDITHER_NONE)
-    cinfo->dither_mode = JDITHER_FS;
-
-  if (is_pre_scan) {
-    /* Set up method pointers */
-    cquantize->pub.color_quantize = prescan_quantize;
-    cquantize->pub.finish_pass = finish_pass1;
-    cquantize->needs_zeroed = TRUE; /* Always zero histogram */
-  } else {
-    /* Set up method pointers */
-    if (cinfo->dither_mode == JDITHER_FS)
-      cquantize->pub.color_quantize = pass2_fs_dither;
-    else
-      cquantize->pub.color_quantize = pass2_no_dither;
-    cquantize->pub.finish_pass = finish_pass2;
-
-    /* Make sure color count is acceptable */
-    i = cinfo->actual_number_of_colors;
-    if (i < 1)
-      ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, 1);
-    if (i > MAXNUMCOLORS)
-      ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
-
-    if (cinfo->dither_mode == JDITHER_FS) {
-      size_t arraysize = (size_t) ((cinfo->output_width + 2) *
-				   (3 * SIZEOF(FSERROR)));
-      /* Allocate Floyd-Steinberg workspace if we didn't already. */
-      if (cquantize->fserrors == NULL)
-	cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
-	  ((j_common_ptr) cinfo, JPOOL_IMAGE, arraysize);
-      /* Initialize the propagated errors to zero. */
-      jzero_far((void FAR *) cquantize->fserrors, arraysize);
-      /* Make the error-limit table if we didn't already. */
-      if (cquantize->error_limiter == NULL)
-	init_error_limit(cinfo);
-      cquantize->on_odd_row = FALSE;
-    }
-
-  }
-  /* Zero the histogram or inverse color map, if necessary */
-  if (cquantize->needs_zeroed) {
-    for (i = 0; i < HIST_C0_ELEMS; i++) {
-      jzero_far((void FAR *) histogram[i],
-		HIST_C1_ELEMS*HIST_C2_ELEMS * SIZEOF(histcell));
-    }
-    cquantize->needs_zeroed = FALSE;
-  }
-}
-
-
-/*
- * Switch to a new external colormap between output passes.
- */
-
-METHODDEF(void)
-new_color_map_2_quant (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize = (my_cquantize_ptr) cinfo->cquantize;
-
-  /* Reset the inverse color map */
-  cquantize->needs_zeroed = TRUE;
-}
-
-
-/*
- * Module initialization routine for 2-pass color quantization.
- */
-
-GLOBAL(void)
-jinit_2pass_quantizer (j_decompress_ptr cinfo)
-{
-  my_cquantize_ptr cquantize;
-  int i;
-
-  cquantize = (my_cquantize_ptr)
-    (*cinfo->mem->alloc_small) ((j_common_ptr) cinfo, JPOOL_IMAGE,
-				SIZEOF(my_cquantizer));
-  cinfo->cquantize = (struct jpeg_color_quantizer *) cquantize;
-  cquantize->pub.start_pass = start_pass_2_quant;
-  cquantize->pub.new_color_map = new_color_map_2_quant;
-  cquantize->fserrors = NULL;	/* flag optional arrays not allocated */
-  cquantize->error_limiter = NULL;
-
-  /* Make sure jdmaster didn't give me a case I can't handle */
-  if (cinfo->out_color_components != 3)
-    ERREXIT(cinfo, JERR_NOTIMPL);
-
-  /* Allocate the histogram/inverse colormap storage */
-  cquantize->histogram = (hist3d) (*cinfo->mem->alloc_small)
-    ((j_common_ptr) cinfo, JPOOL_IMAGE, HIST_C0_ELEMS * SIZEOF(hist2d));
-  for (i = 0; i < HIST_C0_ELEMS; i++) {
-    cquantize->histogram[i] = (hist2d) (*cinfo->mem->alloc_large)
-      ((j_common_ptr) cinfo, JPOOL_IMAGE,
-       HIST_C1_ELEMS*HIST_C2_ELEMS * SIZEOF(histcell));
-  }
-  cquantize->needs_zeroed = TRUE; /* histogram is garbage now */
-
-  /* Allocate storage for the completed colormap, if required.
-   * We do this now since it is FAR storage and may affect
-   * the memory manager's space calculations.
-   */
-  if (cinfo->enable_2pass_quant) {
-    /* Make sure color count is acceptable */
-    int desired = cinfo->desired_number_of_colors;
-    /* Lower bound on # of colors ... somewhat arbitrary as long as > 0 */
-    if (desired < 8)
-      ERREXIT1(cinfo, JERR_QUANT_FEW_COLORS, 8);
-    /* Make sure colormap indexes can be represented by JSAMPLEs */
-    if (desired > MAXNUMCOLORS)
-      ERREXIT1(cinfo, JERR_QUANT_MANY_COLORS, MAXNUMCOLORS);
-    cquantize->sv_colormap = (*cinfo->mem->alloc_sarray)
-      ((j_common_ptr) cinfo,JPOOL_IMAGE, (JDIMENSION) desired, (JDIMENSION) 3);
-    cquantize->desired = desired;
-  } else
-    cquantize->sv_colormap = NULL;
-
-  /* Only F-S dithering or no dithering is supported. */
-  /* If user asks for ordered dither, give him F-S. */
-  if (cinfo->dither_mode != JDITHER_NONE)
-    cinfo->dither_mode = JDITHER_FS;
-
-  /* Allocate Floyd-Steinberg workspace if necessary.
-   * This isn't really needed until pass 2, but again it is FAR storage.
-   * Although we will cope with a later change in dither_mode,
-   * we do not promise to honor max_memory_to_use if dither_mode changes.
-   */
-  if (cinfo->dither_mode == JDITHER_FS) {
-    cquantize->fserrors = (FSERRPTR) (*cinfo->mem->alloc_large)
-      ((j_common_ptr) cinfo, JPOOL_IMAGE,
-       (size_t) ((cinfo->output_width + 2) * (3 * SIZEOF(FSERROR))));
-    /* Might as well create the error-limiting table too. */
-    init_error_limit(cinfo);
-  }
-}
-
-#endif /* QUANT_2PASS_SUPPORTED */

cde/lib/DtHelp/jpeg/jutils.c

@@ -1,202 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jutils.c /main/2 1996/05/09 03:54:23 drk $ */
-/*
- * jutils.c
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains tables and miscellaneous utility routines needed
- * for both compression and decompression.
- * Note we prefix all global names with "j" to minimize conflicts with
- * a surrounding application.
- */
-
-#define JPEG_INTERNALS
-#include "jinclude.h"
-#include "jpeglib.h"
-
-
-/*
- * jpeg_zigzag_order[i] is the zigzag-order position of the i'th element
- * of a DCT block read in natural order (left to right, top to bottom).
- */
-
-#if 0				/* This table is not actually needed in v6a */
-
-const int jpeg_zigzag_order[DCTSIZE2] = {
-   0,  1,  5,  6, 14, 15, 27, 28,
-   2,  4,  7, 13, 16, 26, 29, 42,
-   3,  8, 12, 17, 25, 30, 41, 43,
-   9, 11, 18, 24, 31, 40, 44, 53,
-  10, 19, 23, 32, 39, 45, 52, 54,
-  20, 22, 33, 38, 46, 51, 55, 60,
-  21, 34, 37, 47, 50, 56, 59, 61,
-  35, 36, 48, 49, 57, 58, 62, 63
-};
-
-#endif
-
-/*
- * jpeg_natural_order[i] is the natural-order position of the i'th element
- * of zigzag order.
- *
- * When reading corrupted data, the Huffman decoders could attempt
- * to reference an entry beyond the end of this array (if the decoded
- * zero run length reaches past the end of the block).  To prevent
- * wild stores without adding an inner-loop test, we put some extra
- * "63"s after the real entries.  This will cause the extra coefficient
- * to be stored in location 63 of the block, not somewhere random.
- * The worst case would be a run-length of 15, which means we need 16
- * fake entries.
- */
-
-const int jpeg_natural_order[DCTSIZE2+16] = {
-  0,  1,  8, 16,  9,  2,  3, 10,
- 17, 24, 32, 25, 18, 11,  4,  5,
- 12, 19, 26, 33, 40, 48, 41, 34,
- 27, 20, 13,  6,  7, 14, 21, 28,
- 35, 42, 49, 56, 57, 50, 43, 36,
- 29, 22, 15, 23, 30, 37, 44, 51,
- 58, 59, 52, 45, 38, 31, 39, 46,
- 53, 60, 61, 54, 47, 55, 62, 63,
- 63, 63, 63, 63, 63, 63, 63, 63, /* extra entries for safety in decoder */
- 63, 63, 63, 63, 63, 63, 63, 63
-};
-
-
-/*
- * Arithmetic utilities
- */
-
-GLOBAL(long)
-jdiv_round_up (long a, long b)
-/* Compute a/b rounded up to next integer, ie, ceil(a/b) */
-/* Assumes a >= 0, b > 0 */
-{
-  return (a + b - 1L) / b;
-}
-
-
-GLOBAL(long)
-jround_up (long a, long b)
-/* Compute a rounded up to next multiple of b, ie, ceil(a/b)*b */
-/* Assumes a >= 0, b > 0 */
-{
-  a += b - 1L;
-  return a - (a % b);
-}
-
-
-/* On normal machines we can apply MEMCOPY() and MEMZERO() to sample arrays
- * and coefficient-block arrays.  This won't work on 80x86 because the arrays
- * are FAR and we're assuming a small-pointer memory model.  However, some
- * DOS compilers provide far-pointer versions of memcpy() and memset() even
- * in the small-model libraries.  These will be used if USE_FMEM is defined.
- * Otherwise, the routines below do it the hard way.  (The performance cost
- * is not all that great, because these routines aren't very heavily used.)
- */
-
-#ifndef NEED_FAR_POINTERS	/* normal case, same as regular macros */
-#define FMEMCOPY(dest,src,size)	MEMCOPY(dest,src,size)
-#define FMEMZERO(target,size)	MEMZERO(target,size)
-#else				/* 80x86 case, define if we can */
-#ifdef USE_FMEM
-#define FMEMCOPY(dest,src,size)	_fmemcpy((void FAR *)(dest), (const void FAR *)(src), (size_t)(size))
-#define FMEMZERO(target,size)	_fmemset((void FAR *)(target), 0, (size_t)(size))
-#endif
-#endif
-
-
-GLOBAL(void)
-jcopy_sample_rows (JSAMPARRAY input_array, int source_row,
-		   JSAMPARRAY output_array, int dest_row,
-		   int num_rows, JDIMENSION num_cols)
-/* Copy some rows of samples from one place to another.
- * num_rows rows are copied from input_array[source_row++]
- * to output_array[dest_row++]; these areas may overlap for duplication.
- * The source and destination arrays must be at least as wide as num_cols.
- */
-{
-  JSAMPROW inptr, outptr;
-#ifdef FMEMCOPY
-  size_t count = (size_t) (num_cols * SIZEOF(JSAMPLE));
-#else
-  JDIMENSION count;
-#endif
-  int row;
-
-  input_array += source_row;
-  output_array += dest_row;
-
-  for (row = num_rows; row > 0; row--) {
-    inptr = *input_array++;
-    outptr = *output_array++;
-#ifdef FMEMCOPY
-    FMEMCOPY(outptr, inptr, count);
-#else
-    for (count = num_cols; count > 0; count--)
-      *outptr++ = *inptr++;	/* needn't bother with GETJSAMPLE() here */
-#endif
-  }
-}
-
-
-GLOBAL(void)
-jcopy_block_row (JBLOCKROW input_row, JBLOCKROW output_row,
-		 JDIMENSION num_blocks)
-/* Copy a row of coefficient blocks from one place to another. */
-{
-#ifdef FMEMCOPY
-  FMEMCOPY(output_row, input_row, num_blocks * (DCTSIZE2 * SIZEOF(JCOEF)));
-#else
-  JCOEFPTR inptr, outptr;
-  long count;
-
-  inptr = (JCOEFPTR) input_row;
-  outptr = (JCOEFPTR) output_row;
-  for (count = (long) num_blocks * DCTSIZE2; count > 0; count--) {
-    *outptr++ = *inptr++;
-  }
-#endif
-}
-
-
-GLOBAL(void)
-jzero_far (void FAR * target, size_t bytestozero)
-/* Zero out a chunk of FAR memory. */
-/* This might be sample-array data, block-array data, or alloc_large data. */
-{
-#ifdef FMEMZERO
-  FMEMZERO(target, bytestozero);
-#else
-  char FAR * ptr = (char FAR *) target;
-  size_t count;
-
-  for (count = bytestozero; count > 0; count--) {
-    *ptr++ = 0;
-  }
-#endif
-}

cde/lib/DtHelp/jpeg/jversion.h

@@ -1,37 +0,0 @@
-/*
- * CDE - Common Desktop Environment
- *
- * Copyright (c) 1993-2012, The Open Group. All rights reserved.
- *
- * These libraries and programs are free software; you can
- * redistribute them and/or modify them under the terms of the GNU
- * Lesser General Public License as published by the Free Software
- * Foundation; either version 2 of the License, or (at your option)
- * any later version.
- *
- * These libraries and programs are distributed in the hope that
- * they will be useful, but WITHOUT ANY WARRANTY; without even the
- * implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR
- * PURPOSE. See the GNU Lesser General Public License for more
- * details.
- *
- * You should have received a copy of the GNU Lesser General Public
- * License along with these libraries and programs; if not, write
- * to the Free Software Foundation, Inc., 51 Franklin Street, Fifth
- * Floor, Boston, MA 02110-1301 USA
- */
-/* $XConsortium: jversion.h /main/2 1996/05/09 03:54:37 drk $ */
-/*
- * jversion.h
- *
- * Copyright (C) 1991-1996, Thomas G. Lane.
- * This file is part of the Independent JPEG Group's software.
- * For conditions of distribution and use, see the accompanying README file.
- *
- * This file contains software version identification.
- */
-
-
-#define JVERSION	"6a  7-Feb-96"
-
-#define JCOPYRIGHT	"Copyright (C) 1996, Thomas G. Lane"