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- /* Copyright (C) 1993, 2000, 2002 Aladdin Enterprises. All rights reserved.
-
- This software is provided AS-IS with no warranty, either express or
- implied.
-
- This software is distributed under license and may not be copied,
- modified or distributed except as expressly authorized under the terms
- of the license contained in the file LICENSE in this distribution.
-
- For more information about licensing, please refer to
- http://www.ghostscript.com/licensing/. For information on
- commercial licensing, go to http://www.artifex.com/licensing/ or
- contact Artifex Software, Inc., 101 Lucas Valley Road #110,
- San Rafael, CA 94903, U.S.A., +1(415)492-9861.
- */
- /* $Id: gsccode.h,v 1.14 2004/08/19 19:33:09 stefan Exp $ */
- /* Types for character codes */
- #ifndef gsccode_INCLUDED
- # define gsccode_INCLUDED
- /*
- * Define a character code. Normally this is just a single byte from a
- * string, but because of composite fonts, character codes must be
- * at least 32 bits.
- */
- typedef ulong gs_char;
- #define GS_NO_CHAR ((gs_char)~0L)
- /* Backward compatibility */
- #define gs_no_char GS_NO_CHAR
- /*
- * Define a character glyph code, a.k.a. character name. The space of
- * glyph codes is divided into five sections:
- *
- * - Codes >= GS_MIN_GLYPH_INDEX represent (non-negative)
- * integers biased by GS_MIN_CID_GLYPH. They represent glyph indices
- * of a specific font.
- *
- * - Codes within [GS_MIN_CID_GLYPH, GS_MIN_GLYPH_INDEX) represent (non-negative)
- * integers biased by GS_MIN_CID_GLYPH. They represent PostScript CIDs
- * of a specific Ordering.
- *
- * - Codes < GS_MIN_CID_GLYPH represent named glyphs. There are
- * three sub-sections:
- *
- * - GS_NO_GLYPH, which means "no known glyph value". Note that
- * it is not the same as /.notdef or CID 0 or GID 0: it means
- * that the identity of the glyph is unknown, as opposed to a
- * known glyph that is used for rendering an unknown character
- * code.
- *
- * - Codes < gs_c_min_std_encoding_glyph represent names in some
- * global space that the graphics library doesn't attempt to
- * interpret. (When the client is the PostScript interpreter,
- * these codes are PostScript name indices, but the graphics
- * library doesn't know or rely on this.) The graphics library
- * *does* assume that such codes denote the same names across
- * all fonts, and that they can be converted to a string name
- * by the font's glyph_name virtual procedure.
- *
- * - Codes >= gs_c_min_std_encoding_glyph (and < GS_MIN_CID_GLYPH)
- * represent names in a special space used for the 11 built-in
- * Encodings. The API is defined in gscencs.h. The only
- * procedures that generate or recognize such codes are the ones
- * declared in that file: clients must be careful not to mix
- * such codes with codes in the global space.
- *
- * Client code may assume that GS_NO_GLYPH < GS_MIN_CID_GLYPH (i.e., it is a
- * "name", not an integer), but should not make assumptions about whether
- * GS_NO_GLYPH is less than or greater than gs_c_min_std_encoding_glyph.
- */
- typedef ulong gs_glyph;
- #define GS_NO_GLYPH ((gs_glyph)0x7fffffff)
- #if arch_sizeof_long > 4
- # define GS_MIN_CID_GLYPH ((gs_glyph)0x80000000L)
- #else
- /* Avoid compiler warnings about signed/unsigned constants. */
- # define GS_MIN_CID_GLYPH ((gs_glyph)~0x7fffffff)
- #endif
- #define GS_MIN_GLYPH_INDEX (GS_MIN_CID_GLYPH | (GS_MIN_CID_GLYPH >> 1))
- #define GS_GLYPH_TAG (gs_glyph)(GS_MIN_CID_GLYPH | GS_MIN_GLYPH_INDEX)
- #define GS_MAX_GLYPH max_ulong
- /* Backward compatibility */
- #define gs_no_glyph GS_NO_GLYPH
- #define gs_min_cid_glyph GS_MIN_CID_GLYPH
- #define gs_max_glyph GS_MAX_GLYPH
- /* Define a procedure for marking a gs_glyph during garbage collection. */
- typedef bool (*gs_glyph_mark_proc_t)(const gs_memory_t *mem, gs_glyph glyph, void *proc_data);
- /* Define the indices for known encodings. */
- typedef enum {
- ENCODING_INDEX_UNKNOWN = -1,
- /* Real encodings. These must come first. */
- ENCODING_INDEX_STANDARD = 0,
- ENCODING_INDEX_ISOLATIN1,
- ENCODING_INDEX_SYMBOL,
- ENCODING_INDEX_DINGBATS,
- ENCODING_INDEX_WINANSI,
- ENCODING_INDEX_MACROMAN,
- ENCODING_INDEX_MACEXPERT,
- #define NUM_KNOWN_REAL_ENCODINGS 7
- /* Pseudo-encodings (glyph sets). */
- ENCODING_INDEX_MACGLYPH, /* Mac glyphs */
- ENCODING_INDEX_ALOGLYPH, /* Adobe Latin glyph set */
- ENCODING_INDEX_ALXGLYPH, /* Adobe Latin Extended glyph set */
- ENCODING_INDEX_CFFSTRINGS /* CFF StandardStrings */
- #define NUM_KNOWN_ENCODINGS 11
- } gs_encoding_index_t;
- #define KNOWN_REAL_ENCODING_NAMES\
- "StandardEncoding", "ISOLatin1Encoding", "SymbolEncoding",\
- "DingbatsEncoding", "WinAnsiEncoding", "MacRomanEncoding",\
- "MacExpertEncoding"
- /*
- * For fonts that use more than one method to identify glyphs, define the
- * glyph space for the values returned by procedures that return glyphs.
- * Note that if a font uses only one method (such as Type 1 fonts, which
- * only use names, or TrueType fonts, which only use indexes), the
- * glyph_space argument is ignored.
- */
- typedef enum gs_glyph_space_s {
- GLYPH_SPACE_NAME, /* names (if available) */
- GLYPH_SPACE_INDEX, /* indexes (if available) */
- GLYPH_SPACE_NOGEN /* don't generate new names (Type 3 only) */
- } gs_glyph_space_t;
- /*
- * Define a procedure for mapping a glyph to its (string) name. This is
- * currently used only for CMaps: it is *not* the same as the glyph_name
- * procedure in fonts.
- */
- typedef int (*gs_glyph_name_proc_t)(const gs_memory_t *mem,
- gs_glyph glyph, gs_const_string *pstr,
- void *proc_data);
- #endif /* gsccode_INCLUDED */
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