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kc3-lang/freetype/src/cff/cffload.c
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Author :
David Turner
Date : 2002-01-07 10:04:09
Hash : f86709a1
Message : * src/base/ftobjs.c, src/base/ftoutln.c, src/cache/ftccmap.c, src/cff/cffload.c, src/cff/cffobjs.c, src/pshinter/pshalgo2.c, src/sfnt/ttload.c, src/sfnt/ttsbit.c: removing small compiler warnings (in pedantic compilation modes)
- src/cff/cffload.c
-
/***************************************************************************/ /* */ /* cffload.c */ /* */ /* OpenType and CFF data/program tables loader (body). */ /* */ /* Copyright 1996-2001 by */ /* David Turner, Robert Wilhelm, and Werner Lemberg. */ /* */ /* This file is part of the FreeType project, and may only be used, */ /* modified, and distributed under the terms of the FreeType project */ /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ /* this file you indicate that you have read the license and */ /* understand and accept it fully. */ /* */ /***************************************************************************/ #include <ft2build.h> #include FT_INTERNAL_DEBUG_H #include FT_INTERNAL_OBJECTS_H #include FT_INTERNAL_STREAM_H #include FT_INTERNAL_POSTSCRIPT_NAMES_H #include FT_TRUETYPE_TAGS_H #include "cffload.h" #include "cffparse.h" #include "cfferrs.h" #if 1 static const FT_UShort cff_isoadobe_charset[229] = { 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 111, 112, 113, 114, 115, 116, 117, 118, 119, 120, 121, 122, 123, 124, 125, 126, 127, 128, 129, 130, 131, 132, 133, 134, 135, 136, 137, 138, 139, 140, 141, 142, 143, 144, 145, 146, 147, 148, 149, 150, 151, 152, 153, 154, 155, 156, 157, 158, 159, 160, 161, 162, 163, 164, 165, 166, 167, 168, 169, 170, 171, 172, 173, 174, 175, 176, 177, 178, 179, 180, 181, 182, 183, 184, 185, 186, 187, 188, 189, 190, 191, 192, 193, 194, 195, 196, 197, 198, 199, 200, 201, 202, 203, 204, 205, 206, 207, 208, 209, 210, 211, 212, 213, 214, 215, 216, 217, 218, 219, 220, 221, 222, 223, 224, 225, 226, 227, 228 }; static const FT_UShort cff_expert_charset[166] = { 0, 1, 229, 230, 231, 232, 233, 234, 235, 236, 237, 238, 13, 14, 15, 99, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 27, 28, 249, 250, 251, 252, 253, 254, 255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 109, 110, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 304, 305, 306, 307, 308, 309, 310, 311, 312, 313, 314, 315, 316, 317, 318, 158, 155, 163, 319, 320, 321, 322, 323, 324, 325, 326, 150, 164, 169, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378 }; static const FT_UShort cff_expertsubset_charset[87] = { 0, 1, 231, 232, 235, 236, 237, 238, 13, 14, 15, 99, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 27, 28, 249, 250, 251, 253, 254, 255, 256, 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 109, 110, 267, 268, 269, 270, 272, 300, 301, 302, 305, 314, 315, 158, 155, 163, 320, 321, 322, 323, 324, 325, 326, 150, 164, 169, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346 }; static const FT_UShort cff_standard_encoding[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, 62, 63, 64, 65, 66, 67, 68, 69, 70, 71, 72, 73, 74, 75, 76, 77, 78, 79, 80, 81, 82, 83, 84, 85, 86, 87, 88, 89, 90, 91, 92, 93, 94, 95, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 96, 97, 98, 99, 100, 101, 102, 103, 104, 105, 106, 107, 108, 109, 110, 0, 111, 112, 113, 114, 0, 115, 116, 117, 118, 119, 120, 121, 122, 0, 123, 0, 124, 125, 126, 127, 128, 129, 130, 131, 0, 132, 133, 0, 134, 135, 136, 137, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 138, 0, 139, 0, 0, 0, 0, 140, 141, 142, 143, 0, 0, 0, 0, 0, 144, 0, 0, 0, 145, 0, 0, 146, 147, 148, 149, 0, 0, 0, 0 }; static const FT_UShort cff_expert_encoding[256] = { 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 1, 229, 230, 0, 231, 232, 233, 234, 235, 236, 237, 238, 13, 14, 15, 99, 239, 240, 241, 242, 243, 244, 245, 246, 247, 248, 27, 28, 249, 250, 251, 252, 0, 253, 254, 255, 256, 257, 0, 0, 0, 258, 0, 0, 259, 260, 261, 262, 0, 0, 263, 264, 265, 0, 266, 109, 110, 267, 268, 269, 0, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285, 286, 287, 288, 289, 290, 291, 292, 293, 294, 295, 296, 297, 298, 299, 300, 301, 302, 303, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 304, 305, 306, 0, 0, 307, 308, 309, 310, 311, 0, 312, 0, 0, 312, 0, 0, 314, 315, 0, 0, 316, 317, 318, 0, 0, 0, 158, 155, 163, 319, 320, 321, 322, 323, 324, 325, 0, 0, 326, 150, 164, 169, 327, 328, 329, 330, 331, 332, 333, 334, 335, 336, 337, 338, 339, 340, 341, 342, 343, 344, 345, 346, 347, 348, 349, 350, 351, 352, 353, 354, 355, 356, 357, 358, 359, 360, 361, 362, 363, 364, 365, 366, 367, 368, 369, 370, 371, 372, 373, 374, 375, 376, 377, 378 }; #endif FT_LOCAL_DEF FT_UShort CFF_Get_Standard_Encoding( FT_UInt charcode ) { return (FT_UShort)(charcode < 256 ? cff_standard_encoding[charcode] : 0); } /*************************************************************************/ /* */ /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ /* messages during execution. */ /* */ #undef FT_COMPONENT #define FT_COMPONENT trace_cffload /* read a CFF offset from memory */ static FT_ULong cff_get_offset( FT_Byte* p, FT_Byte off_size ) { FT_ULong result; for ( result = 0; off_size > 0; off_size-- ) { result <<= 8; result |= *p++; } return result; } static FT_Error cff_new_index( CFF_Index* index, FT_Stream stream, FT_Bool load ) { FT_Error error; FT_Memory memory = stream->memory; FT_UShort count; MEM_Set( index, 0, sizeof ( *index ) ); index->stream = stream; if ( !READ_UShort( count ) && count > 0 ) { FT_Byte* p; FT_Byte offsize; FT_ULong data_size; FT_ULong* poff; /* there is at least one element; read the offset size, */ /* then access the offset table to compute the index's total size */ if ( READ_Byte( offsize ) ) goto Exit; index->stream = stream; index->count = count; index->off_size = offsize; data_size = (FT_ULong)( count + 1 ) * offsize; if ( ALLOC_ARRAY( index->offsets, count + 1, FT_ULong ) || ACCESS_Frame( data_size ) ) goto Exit; poff = index->offsets; p = (FT_Byte*)stream->cursor; for ( ; (FT_Short)count >= 0; count-- ) { poff[0] = cff_get_offset( p, offsize ); poff++; p += offsize; } FORGET_Frame(); index->data_offset = FILE_Pos(); data_size = poff[-1] - 1; if ( load ) { /* load the data */ if ( EXTRACT_Frame( data_size, index->bytes ) ) goto Exit; } else { /* skip the data */ if ( FILE_Skip( data_size ) ) goto Exit; } } Exit: if ( error ) FREE( index->offsets ); return error; } static void cff_done_index( CFF_Index* index ) { if ( index->stream ) { FT_Stream stream = index->stream; FT_Memory memory = stream->memory; if ( index->bytes ) RELEASE_Frame( index->bytes ); FREE( index->offsets ); MEM_Set( index, 0, sizeof ( *index ) ); } } static FT_Error cff_explicit_index( CFF_Index* index, FT_Byte*** table ) { FT_Error error = 0; FT_Memory memory = index->stream->memory; FT_UInt n, offset, old_offset; FT_Byte** t; *table = 0; if ( index->count > 0 && !ALLOC_ARRAY( t, index->count + 1, FT_Byte* ) ) { old_offset = 1; for ( n = 0; n <= index->count; n++ ) { offset = index->offsets[n]; if ( !offset ) offset = old_offset; t[n] = index->bytes + offset - 1; old_offset = offset; } *table = t; } return error; } FT_LOCAL_DEF FT_Error CFF_Access_Element( CFF_Index* index, FT_UInt element, FT_Byte** pbytes, FT_ULong* pbyte_len ) { FT_Error error = 0; if ( index && index->count > element ) { /* compute start and end offsets */ FT_ULong off1, off2 = 0; off1 = index->offsets[element]; if ( off1 ) { do { element++; off2 = index->offsets[element]; } while ( off2 == 0 && element < index->count ); if ( !off2 ) off1 = 0; } /* access element */ if ( off1 ) { *pbyte_len = off2 - off1; if ( index->bytes ) { /* this index was completely loaded in memory, that's easy */ *pbytes = index->bytes + off1 - 1; } else { /* this index is still on disk/file, access it through a frame */ FT_Stream stream = index->stream; if ( FILE_Seek( index->data_offset + off1 - 1 ) || EXTRACT_Frame( off2 - off1, *pbytes ) ) goto Exit; } } else { /* empty index element */ *pbytes = 0; *pbyte_len = 0; } } else error = CFF_Err_Invalid_Argument; Exit: return error; } FT_LOCAL_DEF void CFF_Forget_Element( CFF_Index* index, FT_Byte** pbytes ) { if ( index->bytes == 0 ) { FT_Stream stream = index->stream; RELEASE_Frame( *pbytes ); } } FT_LOCAL_DEF FT_String* CFF_Get_Name( CFF_Index* index, FT_UInt element ) { FT_Memory memory = index->stream->memory; FT_Byte* bytes; FT_ULong byte_len; FT_Error error; FT_String* name = 0; error = CFF_Access_Element( index, element, &bytes, &byte_len ); if ( error ) goto Exit; if ( !ALLOC( name, byte_len + 1 ) ) { MEM_Copy( name, bytes, byte_len ); name[byte_len] = 0; } CFF_Forget_Element( index, &bytes ); Exit: return name; } FT_LOCAL_DEF FT_String* CFF_Get_String( CFF_Index* index, FT_UInt sid, PSNames_Interface* interface ) { /* if it is not a standard string, return it */ if ( sid > 390 ) return CFF_Get_Name( index, sid - 391 ); /* that's a standard string, fetch a copy from the PSName module */ { FT_String* name = 0; const char* adobe_name = interface->adobe_std_strings( sid ); FT_UInt len; if ( adobe_name ) { FT_Memory memory = index->stream->memory; FT_Error error; len = (FT_UInt)strlen( adobe_name ); if ( !ALLOC( name, len + 1 ) ) { MEM_Copy( name, adobe_name, len ); name[len] = 0; } } return name; } } /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** FD Select table support ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ static void CFF_Done_FD_Select( CFF_FD_Select* select, FT_Stream stream ) { if ( select->data ) RELEASE_Frame( select->data ); select->data_size = 0; select->format = 0; select->range_count = 0; } static FT_Error CFF_Load_FD_Select( CFF_FD_Select* select, FT_UInt num_glyphs, FT_Stream stream, FT_ULong offset ) { FT_Error error; FT_Byte format; FT_UInt num_ranges; /* read format */ if ( FILE_Seek( offset ) || READ_Byte( format ) ) goto Exit; select->format = format; select->cache_count = 0; /* clear cache */ switch ( format ) { case 0: /* format 0, that's simple */ select->data_size = num_glyphs; goto Load_Data; case 3: /* format 3, a tad more complex */ if ( READ_UShort( num_ranges ) ) goto Exit; select->data_size = num_ranges * 3 + 2; Load_Data: if ( EXTRACT_Frame( select->data_size, select->data ) ) goto Exit; break; default: /* hmm... that's wrong */ error = CFF_Err_Invalid_File_Format; } Exit: return error; } FT_LOCAL_DEF FT_Byte CFF_Get_FD( CFF_FD_Select* select, FT_UInt glyph_index ) { FT_Byte fd = 0; switch ( select->format ) { case 0: fd = select->data[glyph_index]; break; case 3: /* first, compare to cache */ if ( (FT_UInt)(glyph_index-select->cache_first) < select->cache_count ) { fd = select->cache_fd; break; } /* then, lookup the ranges array */ { FT_Byte* p = select->data; FT_Byte* p_limit = p + select->data_size; FT_Byte fd2; FT_UInt first, limit; first = NEXT_UShort( p ); do { if ( glyph_index < first ) break; fd2 = *p++; limit = NEXT_UShort( p ); if ( glyph_index < limit ) { fd = fd2; /* update cache */ select->cache_first = first; select->cache_count = limit-first; select->cache_fd = fd2; break; } first = limit; } while ( p < p_limit ); } break; default: ; } return fd; } /*************************************************************************/ /*************************************************************************/ /*** ***/ /*** CFF font support ***/ /*** ***/ /*************************************************************************/ /*************************************************************************/ static void CFF_Done_Encoding( CFF_Encoding* encoding, FT_Stream stream ) { FT_Memory memory = stream->memory; FREE( encoding->codes ); FREE( encoding->sids ); encoding->format = 0; encoding->offset = 0; encoding->codes = 0; encoding->sids = 0; } static void CFF_Done_Charset( CFF_Charset* charset, FT_Stream stream ) { FT_Memory memory = stream->memory; FREE( charset->sids ); charset->format = 0; charset->offset = 0; charset->sids = 0; } static FT_Error CFF_Load_Charset( CFF_Charset* charset, FT_UInt num_glyphs, FT_Stream stream, FT_ULong base_offset, FT_ULong offset ) { FT_Memory memory = stream->memory; FT_Error error = 0; FT_UShort glyph_sid; charset->offset = base_offset + offset; /* Get the format of the table. */ if ( FILE_Seek( charset->offset ) || READ_Byte( charset->format ) ) goto Exit; /* If the the offset is greater than 2, we have to parse the */ /* charset table. */ if ( offset > 2 ) { FT_UInt j; /* Allocate memory for sids. */ if ( ALLOC( charset->sids, num_glyphs * sizeof ( FT_UShort ) ) ) goto Exit; /* assign the .notdef glyph */ charset->sids[0] = 0; switch ( charset->format ) { case 0: for ( j = 1; j < num_glyphs; j++ ) { if ( READ_UShort( glyph_sid ) ) goto Exit; charset->sids[j] = glyph_sid; } break; case 1: case 2: { FT_UInt nleft; FT_UInt i; j = 1; while ( j < num_glyphs ) { /* Read the first glyph sid of the range. */ if ( READ_UShort( glyph_sid ) ) goto Exit; /* Read the number of glyphs in the range. */ if ( charset->format == 2 ) { if ( READ_UShort( nleft ) ) goto Exit; } else { if ( READ_Byte( nleft ) ) goto Exit; } /* Fill in the range of sids -- `nleft + 1' glyphs. */ for ( i = 0; i <= nleft; i++, j++, glyph_sid++ ) charset->sids[j] = glyph_sid; } } break; default: FT_ERROR(( "CFF_Load_Charset: invalid table format!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } } else { /* Parse default tables corresponding to offset == 0, 1, or 2. */ /* CFF specification intimates the following: */ /* */ /* In order to use a predefined charset, the following must be */ /* true: The charset constructed for the glyphs in the font's */ /* charstrings dictionary must match the predefined charset in */ /* the first num_glyphs, and hence must match the predefined */ /* charset *exactly*. */ switch ( offset ) { case 0: if ( num_glyphs != 229 ) { FT_ERROR(("CFF_Load_Charset: implicit charset not equal to\n" "predefined charset (Adobe ISO-Latin)!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } /* Allocate memory for sids. */ if ( ALLOC( charset->sids, num_glyphs * sizeof ( FT_UShort ) ) ) goto Exit; /* Copy the predefined charset into the allocated memory. */ MEM_Copy( charset->sids, cff_isoadobe_charset, num_glyphs * sizeof ( FT_UShort ) ); break; case 1: if ( num_glyphs != 166 ) { FT_ERROR(( "CFF_Load_Charset: implicit charset not equal to\n" "predefined charset (Adobe Expert)!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } /* Allocate memory for sids. */ if ( ALLOC( charset->sids, num_glyphs * sizeof ( FT_UShort ) ) ) goto Exit; /* Copy the predefined charset into the allocated memory. */ MEM_Copy( charset->sids, cff_expert_charset, num_glyphs * sizeof ( FT_UShort ) ); break; case 2: if ( num_glyphs != 87 ) { FT_ERROR(( "CFF_Load_Charset: implicit charset not equal to\n" "predefined charset (Adobe Expert Subset)!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } /* Allocate memory for sids. */ if ( ALLOC( charset->sids, num_glyphs * sizeof ( FT_UShort ) ) ) goto Exit; /* Copy the predefined charset into the allocated memory. */ MEM_Copy( charset->sids, cff_expertsubset_charset, num_glyphs * sizeof ( FT_UShort ) ); break; default: error = CFF_Err_Invalid_File_Format; goto Exit; } } Exit: /* Clean up if there was an error. */ if ( error ) if ( charset->sids ) { if ( charset->sids ) FREE( charset->sids ); charset->format = 0; charset->offset = 0; charset->sids = 0; } return error; } static FT_Error CFF_Load_Encoding( CFF_Encoding* encoding, CFF_Charset* charset, FT_UInt num_glyphs, FT_Stream stream, FT_ULong base_offset, FT_ULong offset ) { FT_Memory memory = stream->memory; FT_Error error = 0; FT_UInt count; FT_UInt j; FT_UShort glyph_sid; FT_Byte glyph_code; /* Check for charset->sids. If we do not have this, we fail. */ if ( !charset->sids ) { error = CFF_Err_Invalid_File_Format; goto Exit; } /* Allocate memory for sids/codes -- there are at most 256 sids/codes */ /* for an encoding. */ if ( ALLOC( encoding->sids, 256 * sizeof ( FT_UShort ) ) || ALLOC( encoding->codes, 256 * sizeof ( FT_UShort ) ) ) goto Exit; /* Zero out the code to gid/sid mappings. */ for ( j = 0; j < 255; j++ ) { encoding->sids [j] = 0; encoding->codes[j] = 0; } /* Note: The encoding table in a CFF font is indexed by glyph index, */ /* where the first encoded glyph index is 1. Hence, we read the char */ /* code (`glyph_code') at index j and make the assignment: */ /* */ /* encoding->codes[glyph_code] = j + 1 */ /* */ /* We also make the assignment: */ /* */ /* encoding->sids[glyph_code] = charset->sids[j + 1] */ /* */ /* This gives us both a code to GID and a code to SID mapping. */ if ( offset > 1 ) { encoding->offset = base_offset + offset; /* we need to parse the table to determine its size */ if ( FILE_Seek( encoding->offset ) || READ_Byte( encoding->format ) || READ_Byte( count ) ) goto Exit; switch ( encoding->format & 0x7F ) { case 0: for ( j = 1; j <= count; j++ ) { if ( READ_Byte( glyph_code ) ) goto Exit; /* Make sure j is not too big. */ if ( j > num_glyphs ) goto Exit; /* Assign code to GID mapping. */ encoding->codes[glyph_code] = (FT_UShort)j; /* Assign code to SID mapping. */ encoding->sids[glyph_code] = charset->sids[j]; } break; case 1: { FT_Byte nleft; FT_UInt i = 1; FT_UInt k; /* Parse the Format1 ranges. */ for ( j = 0; j < count; j++, i += nleft ) { /* Read the first glyph code of the range. */ if ( READ_Byte( glyph_code ) ) goto Exit; /* Read the number of codes in the range. */ if ( READ_Byte( nleft ) ) goto Exit; /* Increment nleft, so we read `nleft + 1' codes/sids. */ nleft++; /* Fill in the range of codes/sids. */ for ( k = i; k < nleft + i; k++, glyph_code++ ) { /* Make sure k is not too big. */ if ( k > num_glyphs ) goto Exit; /* Assign code to GID mapping. */ encoding->codes[glyph_code] = (FT_UShort)k; /* Assign code to SID mapping. */ encoding->sids[glyph_code] = charset->sids[k]; } } } break; default: FT_ERROR(( "CFF_Load_Encoding: invalid table format!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } /* Parse supplemental encodings, if any. */ if ( encoding->format & 0x80 ) { FT_UInt glyph_id; /* count supplements */ if ( READ_Byte( count ) ) goto Exit; for ( j = 0; j < count; j++ ) { /* Read supplemental glyph code. */ if ( READ_Byte( glyph_code ) ) goto Exit; /* Read the SID associated with this glyph code. */ if ( READ_UShort( glyph_sid ) ) goto Exit; /* Assign code to SID mapping. */ encoding->sids[glyph_code] = glyph_sid; /* First, lookup GID which has been assigned to */ /* SID glyph_sid. */ for ( glyph_id = 0; glyph_id < num_glyphs; glyph_id++ ) { if ( charset->sids[glyph_id] == glyph_sid ) break; } /* Now, make the assignment. */ encoding->codes[glyph_code] = (FT_UShort)glyph_id; } } } else { FT_UInt i; /* We take into account the fact a CFF font can use a predefined */ /* encoding without containing all of the glyphs encoded by this */ /* encoding (see the note at the end of section 12 in the CFF */ /* specification). */ switch ( offset ) { case 0: /* First, copy the code to SID mapping. */ MEM_Copy( encoding->sids, cff_standard_encoding, 256 * sizeof ( FT_UShort ) ); /* Construct code to GID mapping from code */ /* to SID mapping and charset. */ for ( j = 0; j < 256; j++ ) { /* If j is encoded, find the GID for it. */ if ( encoding->sids[j] ) { for ( i = 1; i < num_glyphs; i++ ) /* We matched, so break. */ if ( charset->sids[i] == encoding->sids[j] ) break; /* i will be equal to num_glyphs if we exited the above */ /* loop without a match. In this case, we also have to */ /* fix the code to SID mapping. */ if ( i == num_glyphs ) { encoding->codes[j] = 0; encoding->sids [j] = 0; } else encoding->codes[j] = (FT_UShort)i; } } break; case 1: /* First, copy the code to SID mapping. */ MEM_Copy( encoding->sids, cff_expert_encoding, 256 * sizeof ( FT_UShort ) ); /* Construct code to GID mapping from code to SID mapping */ /* and charset. */ for ( j = 0; j < 256; j++ ) { /* If j is encoded, find the GID for it. */ if ( encoding->sids[j] ) { for ( i = 1; i < num_glyphs; i++ ) /* We matched, so break. */ if ( charset->sids[i] == encoding->sids[j] ) break; /* i will be equal to num_glyphs if we exited the above */ /* loop without a match. In this case, we also have to */ /* fix the code to SID mapping. */ if ( i == num_glyphs ) { encoding->codes[j] = 0; encoding->sids [j] = 0; } else encoding->codes[j] = (FT_UShort)i; } } break; default: FT_ERROR(( "CFF_Load_Encoding: invalid table format!\n" )); error = CFF_Err_Invalid_File_Format; goto Exit; } } Exit: /* Clean up if there was an error. */ if ( error ) { if ( encoding->sids || encoding->codes ) { if ( encoding->sids ) FREE( encoding->sids ); if ( encoding->codes ) FREE( encoding->codes ); charset->format = 0; charset->offset = 0; charset->sids = 0; } } return error; } static FT_Error CFF_Load_SubFont( CFF_SubFont* font, CFF_Index* index, FT_UInt font_index, FT_Stream stream, FT_ULong base_offset ) { FT_Error error; CFF_Parser parser; FT_Byte* dict; FT_ULong dict_len; CFF_Font_Dict* top = &font->font_dict; CFF_Private* priv = &font->private_dict; CFF_Parser_Init( &parser, CFF_CODE_TOPDICT, &font->font_dict ); /* set defaults */ MEM_Set( top, 0, sizeof ( *top ) ); top->underline_position = -100; top->underline_thickness = 50; top->charstring_type = 2; top->font_matrix.xx = 0x10000L; top->font_matrix.yy = 0x10000L; top->cid_count = 8720; error = CFF_Access_Element( index, font_index, &dict, &dict_len ) || CFF_Parser_Run( &parser, dict, dict + dict_len ); CFF_Forget_Element( index, &dict ); if ( error ) goto Exit; /* if it is a CID font, we stop there */ if ( top->cid_registry ) goto Exit; /* parse the private dictionary, if any */ if ( top->private_offset && top->private_size ) { /* set defaults */ MEM_Set( priv, 0, sizeof ( *priv ) ); priv->blue_shift = 7; priv->blue_fuzz = 1; priv->lenIV = -1; priv->expansion_factor = (FT_Fixed)0.06 * 0x10000L; priv->blue_scale = (FT_Fixed)0.039625 * 0x10000L; CFF_Parser_Init( &parser, CFF_CODE_PRIVATE, priv ); if ( FILE_Seek( base_offset + font->font_dict.private_offset ) || ACCESS_Frame( font->font_dict.private_size ) ) goto Exit; error = CFF_Parser_Run( &parser, (FT_Byte*)stream->cursor, (FT_Byte*)stream->limit ); FORGET_Frame(); if ( error ) goto Exit; } /* read the local subrs, if any */ if ( priv->local_subrs_offset ) { if ( FILE_Seek( base_offset + top->private_offset + priv->local_subrs_offset ) ) goto Exit; error = cff_new_index( &font->local_subrs_index, stream, 1 ); if ( error ) goto Exit; font->num_local_subrs = font->local_subrs_index.count; error = cff_explicit_index( &font->local_subrs_index, &font->local_subrs ); if ( error ) goto Exit; } Exit: return error; } static void CFF_Done_SubFont( FT_Memory memory, CFF_SubFont* subfont ) { if ( subfont ) { cff_done_index( &subfont->local_subrs_index ); FREE( subfont->local_subrs ); } } FT_LOCAL_DEF FT_Error CFF_Load_Font( FT_Stream stream, FT_Int face_index, CFF_Font* font ) { static const FT_Frame_Field cff_header_fields[] = { #undef FT_STRUCTURE #define FT_STRUCTURE CFF_Font FT_FRAME_START( 4 ), FT_FRAME_BYTE( version_major ), FT_FRAME_BYTE( version_minor ), FT_FRAME_BYTE( header_size ), FT_FRAME_BYTE( absolute_offsize ), FT_FRAME_END }; FT_Error error; FT_Memory memory = stream->memory; FT_ULong base_offset; CFF_Font_Dict* dict; MEM_Set( font, 0, sizeof ( *font ) ); font->stream = stream; font->memory = memory; dict = &font->top_font.font_dict; base_offset = FILE_Pos(); /* read CFF font header */ if ( READ_Fields( cff_header_fields, font ) ) goto Exit; /* check format */ if ( font->version_major != 1 || font->header_size < 4 || font->absolute_offsize > 4 ) { FT_TRACE2(( "[not a CFF font header!]\n" )); error = CFF_Err_Unknown_File_Format; goto Exit; } /* skip the rest of the header */ if ( FILE_Skip( font->header_size - 4 ) ) goto Exit; /* read the name, top dict, string and global subrs index */ if ( FT_SET_ERROR( cff_new_index( &font->name_index, stream, 0 )) || FT_SET_ERROR( cff_new_index( &font->font_dict_index, stream, 0 )) || FT_SET_ERROR( cff_new_index( &font->string_index, stream, 0 )) || FT_SET_ERROR( cff_new_index( &font->global_subrs_index, stream, 1 )) ) goto Exit; /* well, we don't really forget the `disabled' fonts... */ font->num_faces = font->name_index.count; if ( face_index >= (FT_Int)font->num_faces ) { FT_ERROR(( "CFF_Load_Font: incorrect face index = %d\n", face_index )); error = CFF_Err_Invalid_Argument; } /* in case of a font format check, simply exit now */ if ( face_index < 0 ) goto Exit; /* now, parse the top-level font dictionary */ error = CFF_Load_SubFont( &font->top_font, &font->font_dict_index, face_index, stream, base_offset ); if ( error ) goto Exit; /* now, check for a CID font */ if ( dict->cid_registry ) { CFF_Index fd_index; CFF_SubFont* sub; FT_UInt index; /* this is a CID-keyed font, we must now allocate a table of */ /* sub-fonts, then load each of them separately */ if ( FILE_Seek( base_offset + dict->cid_fd_array_offset ) ) goto Exit; error = cff_new_index( &fd_index, stream, 0 ); if ( error ) goto Exit; if ( fd_index.count > CFF_MAX_CID_FONTS ) { FT_ERROR(( "CFF_Load_Font: FD array too large in CID font\n" )); goto Fail_CID; } /* allocate & read each font dict independently */ font->num_subfonts = fd_index.count; if ( ALLOC_ARRAY( sub, fd_index.count, CFF_SubFont ) ) goto Fail_CID; /* setup pointer table */ for ( index = 0; index < fd_index.count; index++ ) font->subfonts[index] = sub + index; /* now load each sub font independently */ for ( index = 0; index < fd_index.count; index++ ) { sub = font->subfonts[index]; error = CFF_Load_SubFont( sub, &fd_index, index, stream, base_offset ); if ( error ) goto Fail_CID; } /* now load the FD Select array */ error = CFF_Load_FD_Select( &font->fd_select, dict->cid_count, stream, base_offset + dict->cid_fd_select_offset ); Fail_CID: cff_done_index( &fd_index ); if ( error ) goto Exit; } else font->num_subfonts = 0; /* read the charstrings index now */ if ( dict->charstrings_offset == 0 ) { FT_ERROR(( "CFF_Load_Font: no charstrings offset!\n" )); error = CFF_Err_Unknown_File_Format; goto Exit; } if ( FILE_Seek( base_offset + dict->charstrings_offset ) ) goto Exit; error = cff_new_index( &font->charstrings_index, stream, 0 ); if ( error ) goto Exit; /* explicit the global subrs */ font->num_global_subrs = font->global_subrs_index.count; font->num_glyphs = font->charstrings_index.count; error = cff_explicit_index( &font->global_subrs_index, &font->global_subrs ) ; if ( error ) goto Exit; /* read the Charset and Encoding tables when available */ error = CFF_Load_Charset( &font->charset, font->num_glyphs, stream, base_offset, dict->charset_offset ); if ( error ) goto Exit; error = CFF_Load_Encoding( &font->encoding, &font->charset, font->num_glyphs, stream, base_offset, dict->encoding_offset ); if ( error ) goto Exit; /* get the font name */ font->font_name = CFF_Get_Name( &font->name_index, face_index ); Exit: return error; } FT_LOCAL_DEF void CFF_Done_Font( CFF_Font* font ) { FT_Memory memory = font->memory; FT_UInt index; cff_done_index( &font->global_subrs_index ); cff_done_index( &font->string_index ); cff_done_index( &font->font_dict_index ); cff_done_index( &font->name_index ); cff_done_index( &font->charstrings_index ); /* release font dictionaries, but only if working with */ /* a CID keyed CFF font */ if ( font->num_subfonts > 0 ) { for ( index = 0; index < font->num_subfonts; index++ ) CFF_Done_SubFont( memory, font->subfonts[index] ); FREE( font->subfonts ); } CFF_Done_Encoding( &font->encoding, font->stream ); CFF_Done_Charset( &font->charset, font->stream ); CFF_Done_SubFont( memory, &font->top_font ); CFF_Done_FD_Select( &font->fd_select, font->stream ); FREE( font->global_subrs ); FREE( font->font_name ); } /* END */