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- /*
- * 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: ilreadimage.c /main/3 1995/10/23 15:59:31 rswiston $ */
- /**---------------------------------------------------------------------
- ***
- *** (c)Copyright 1991 Hewlett-Packard Co.
- ***
- *** RESTRICTED RIGHTS LEGEND
- *** Use, duplication, or disclosure by the U.S. Government is subject to
- *** restrictions as set forth in sub-paragraph (c)(1)(ii) of the Rights in
- *** Technical Data and Computer Software clause in DFARS 252.227-7013.
- *** Hewlett-Packard Company
- *** 3000 Hanover Street
- *** Palo Alto, CA 94304 U.S.A.
- *** Rights for non-DOD U.S. Government Departments and Agencies are as set
- *** forth in FAR 52.227-19(c)(1,2).
- ***
- ***-------------------------------------------------------------------*/
- #include "ilint.h"
- #include "ilpipelem.h"
- #include "ilpipeint.h"
- #include "ilimage.h"
- #include "ilerrors.h"
- /* Private structure for ilRCIExecute(). (RCI = "Read Compressed Image") */
- typedef struct {
- ilImagePtr pImage; /* ptr to src image */
- long strip; /* Init(): index of next strip to write */
- long nLinesWritten; /* Init(): # of lines written so far */
- } ilRCIPrivRec, *ilRCIPrivPtr;
- /* ------------------------- ilRCIInit ----------------------------------- */
- /* Init() function for ilRCI().
- */
- static ilError ilRCIInit (
- ilRCIPrivPtr pPriv,
- ilImageInfo *pSrcImage,
- ilImageInfo *pDstImage
- )
- {
- pPriv->strip = 0; /* init strip index, for first strip */
- pPriv->nLinesWritten = 0;
- return IL_OK;
- }
- /* --------------------- ilRCIExecute -------------------------- */
- /* Execute() for ilReadImage() producer when the image is compressed.
- */
- static ilError ilRCIExecute (
- ilExecuteData *pData,
- long dstLine, /* ignored */
- long *pNLines /* ignored on input */
- )
- {
- ilRCIPrivPtr pPriv;
- ilImagePtr pImage;
- long offset;
- pPriv = (ilRCIPrivPtr)pData->pPrivate;
- pImage = pPriv->pImage;
- /* Return error if image has never been written to. */
- if (!pImage->pStripOffsets || !pImage->i.plane[0].pPixels)
- return IL_ERROR_NULL_COMPRESSED_IMAGE;
- /* "write" current strip by patching next filter's offset to offset for
- current strip, and setting its # bytes to size of this strip.
- */
- offset = pImage->pStripOffsets[pPriv->strip];
- *pData->compressed.pDstOffset = offset;
- pPriv->strip++;
- *pData->compressed.pNBytesWritten = pImage->pStripOffsets[pPriv->strip] - offset;
- /* If last strip, # of lines is remaining, else is strip height */
- if ((pPriv->nLinesWritten + pImage->stripHeight) > pImage->i.height) {
- *pNLines = pImage->i.height - pPriv->nLinesWritten;
- return IL_ERROR_LAST_STRIP;
- }
- pPriv->nLinesWritten += pImage->stripHeight;
- *pNLines = pImage->stripHeight;
- return IL_OK;
- }
- /* ------------------------ ilReadImage ---------------------------------- */
- /* Public function: see spec.
- Adds the given image as a producer of the pipe.
- */
- ilBool ilReadImage (
- ilPipe pipe,
- ilObject image
- )
- {
- ilImagePtr pImage;
- ilRCIPrivPtr pPriv;
- /* Validate that pipe and image are such, have same context and pipe empty */
- pImage = (ilImagePtr)image;
- if (pipe->objectType != IL_PIPE) {
- pipe->context->error = IL_ERROR_OBJECT_TYPE;
- return FALSE;
- }
- if ((pImage->o.p.objectType != IL_INTERNAL_IMAGE)
- && (pImage->o.p.objectType != IL_CLIENT_IMAGE))
- return ilDeclarePipeInvalid (pipe, IL_ERROR_OBJECT_TYPE);
- if (pImage->o.p.context != pipe->context)
- return ilDeclarePipeInvalid (pipe, IL_ERROR_CONTEXT_MISMATCH);
- if (ilGetPipeInfo (pipe, FALSE, (ilPipeInfo *)NULL, (ilImageDes *)NULL,
- (ilImageFormat *)NULL) != IL_PIPE_EMPTY) {
- if (!pipe->context->error)
- ilDeclarePipeInvalid (pipe, IL_ERROR_PIPE_STATE);
- return FALSE;
- }
- /* If uncompressed, add producer image and exit. stripHeight = image height,
- need producer throttle filter before next element is added.
- */
- if (pImage->des.compression == IL_UNCOMPRESSED)
- return _ilAddProducerImage (pipe, pImage, IL_PIPE_IMAGE, pImage->i.height,
- pImage->i.height, TRUE, TRUE);
- /* Image is compressed: if no stripHeight yet, allocate strip offsets array using
- default strip height. Add producer image: constant strips the size of the
- image's strip height. Add producer throttle to feed each strip.
- */
- if (!pImage->pStripOffsets)
- if (!_ilAllocStripOffsets (pImage, 0))
- return FALSE;
- if (!_ilAddProducerImage (pipe, pImage, IL_PIPE_IMAGE, pImage->i.height,
- pImage->stripHeight, TRUE, FALSE))
- return FALSE;
- pPriv = (ilRCIPrivPtr)ilAddPipeElement (pipe, IL_FILTER, sizeof (ilRCIPrivRec),
- IL_ADD_PIPE_NO_DST, (ilSrcElementData *)NULL, (ilDstElementData *)NULL,
- ilRCIInit, IL_NPF, IL_NPF, ilRCIExecute, 0);
- if (!pPriv)
- return FALSE;
- pPriv->pImage = pImage;
- return TRUE;
- }
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