diff options
Diffstat (limited to 'nx-X11/extras/freetype2/src/cff/cffload.c')
-rw-r--r-- | nx-X11/extras/freetype2/src/cff/cffload.c | 2313 |
1 files changed, 2313 insertions, 0 deletions
diff --git a/nx-X11/extras/freetype2/src/cff/cffload.c b/nx-X11/extras/freetype2/src/cff/cffload.c new file mode 100644 index 000000000..350e01f3f --- /dev/null +++ b/nx-X11/extras/freetype2/src/cff/cffload.c @@ -0,0 +1,2313 @@ +/***************************************************************************/ +/* */ +/* cffload.c */ +/* */ +/* OpenType and CFF data/program tables loader (body). */ +/* */ +/* Copyright 1996-2001, 2002, 2003, 2004 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_SERVICE_POSTSCRIPT_CMAPS_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 idx, + FT_Stream stream, + FT_Bool load ) + { + FT_Error error; + FT_Memory memory = stream->memory; + FT_UShort count; + + + FT_MEM_ZERO( idx, sizeof ( *idx ) ); + + idx->stream = stream; + if ( !FT_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 ( FT_READ_BYTE( offsize ) ) + goto Exit; + + idx->stream = stream; + idx->count = count; + idx->off_size = offsize; + data_size = (FT_ULong)( count + 1 ) * offsize; + + if ( FT_NEW_ARRAY( idx->offsets, count + 1 ) || + FT_FRAME_ENTER( data_size ) ) + goto Exit; + + poff = idx->offsets; + p = (FT_Byte*)stream->cursor; + + for ( ; (FT_Short)count >= 0; count-- ) + { + poff[0] = cff_get_offset( p, offsize ); + poff++; + p += offsize; + } + + FT_FRAME_EXIT(); + + idx->data_offset = FT_STREAM_POS(); + data_size = poff[-1] - 1; + + if ( load ) + { + /* load the data */ + if ( FT_FRAME_EXTRACT( data_size, idx->bytes ) ) + goto Exit; + } + else + { + /* skip the data */ + if ( FT_STREAM_SKIP( data_size ) ) + goto Exit; + } + } + + Exit: + if ( error ) + FT_FREE( idx->offsets ); + + return error; + } + + + static void + cff_done_index( CFF_Index idx ) + { + if ( idx->stream ) + { + FT_Stream stream = idx->stream; + FT_Memory memory = stream->memory; + + + if ( idx->bytes ) + FT_FRAME_RELEASE( idx->bytes ); + + FT_FREE( idx->offsets ); + FT_MEM_ZERO( idx, sizeof ( *idx ) ); + } + } + + + /* allocate a table containing pointers to an index's elements */ + static FT_Error + cff_index_get_pointers( CFF_Index idx, + FT_Byte*** table ) + { + FT_Error error = CFF_Err_Ok; + FT_Memory memory = idx->stream->memory; + FT_ULong n, offset, old_offset; + FT_Byte** t; + + + *table = 0; + + if ( idx->count > 0 && !FT_NEW_ARRAY( t, idx->count + 1 ) ) + { + old_offset = 1; + for ( n = 0; n <= idx->count; n++ ) + { + offset = idx->offsets[n]; + if ( !offset ) + offset = old_offset; + + t[n] = idx->bytes + offset - 1; + + old_offset = offset; + } + *table = t; + } + + return error; + } + + + FT_LOCAL_DEF( FT_Error ) + cff_index_access_element( CFF_Index idx, + FT_UInt element, + FT_Byte** pbytes, + FT_ULong* pbyte_len ) + { + FT_Error error = CFF_Err_Ok; + + + if ( idx && idx->count > element ) + { + /* compute start and end offsets */ + FT_ULong off1, off2 = 0; + + + off1 = idx->offsets[element]; + if ( off1 ) + { + do + { + element++; + off2 = idx->offsets[element]; + + } while ( off2 == 0 && element < idx->count ); + + if ( !off2 ) + off1 = 0; + } + + /* access element */ + if ( off1 ) + { + *pbyte_len = off2 - off1; + + if ( idx->bytes ) + { + /* this index was completely loaded in memory, that's easy */ + *pbytes = idx->bytes + off1 - 1; + } + else + { + /* this index is still on disk/file, access it through a frame */ + FT_Stream stream = idx->stream; + + + if ( FT_STREAM_SEEK( idx->data_offset + off1 - 1 ) || + FT_FRAME_EXTRACT( 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_index_forget_element( CFF_Index idx, + FT_Byte** pbytes ) + { + if ( idx->bytes == 0 ) + { + FT_Stream stream = idx->stream; + + + FT_FRAME_RELEASE( *pbytes ); + } + } + + + FT_LOCAL_DEF( FT_String* ) + cff_index_get_name( CFF_Index idx, + FT_UInt element ) + { + FT_Memory memory = idx->stream->memory; + FT_Byte* bytes; + FT_ULong byte_len; + FT_Error error; + FT_String* name = 0; + + + error = cff_index_access_element( idx, element, &bytes, &byte_len ); + if ( error ) + goto Exit; + + if ( !FT_ALLOC( name, byte_len + 1 ) ) + { + FT_MEM_COPY( name, bytes, byte_len ); + name[byte_len] = 0; + } + cff_index_forget_element( idx, &bytes ); + + Exit: + return name; + } + + + FT_LOCAL_DEF( FT_String* ) + cff_index_get_sid_string( CFF_Index idx, + FT_UInt sid, + FT_Service_PsCMaps psnames ) + { + /* value 0xFFFFU indicates a missing dictionary entry */ + if ( sid == 0xFFFFU ) + return 0; + + /* if it is not a standard string, return it */ + if ( sid > 390 ) + return cff_index_get_name( idx, sid - 391 ); + + /* CID-keyed CFF fonts don't have glyph names */ + if ( !psnames ) + return 0; + + /* that's a standard string, fetch a copy from the PSName module */ + { + FT_String* name = 0; + const char* adobe_name = psnames->adobe_std_strings( sid ); + FT_UInt len; + + + if ( adobe_name ) + { + FT_Memory memory = idx->stream->memory; + FT_Error error; + + + len = (FT_UInt)ft_strlen( adobe_name ); + if ( !FT_ALLOC( name, len + 1 ) ) + { + FT_MEM_COPY( name, adobe_name, len ); + name[len] = 0; + } + + FT_UNUSED( error ); + } + + return name; + } + } + + + /*************************************************************************/ + /*************************************************************************/ + /*** ***/ + /*** FD Select table support ***/ + /*** ***/ + /*************************************************************************/ + /*************************************************************************/ + + + static void + CFF_Done_FD_Select( CFF_FDSelect fdselect, + FT_Stream stream ) + { + if ( fdselect->data ) + FT_FRAME_RELEASE( fdselect->data ); + + fdselect->data_size = 0; + fdselect->format = 0; + fdselect->range_count = 0; + } + + + static FT_Error + CFF_Load_FD_Select( CFF_FDSelect fdselect, + FT_UInt num_glyphs, + FT_Stream stream, + FT_ULong offset ) + { + FT_Error error; + FT_Byte format; + FT_UInt num_ranges; + + + /* read format */ + if ( FT_STREAM_SEEK( offset ) || FT_READ_BYTE( format ) ) + goto Exit; + + fdselect->format = format; + fdselect->cache_count = 0; /* clear cache */ + + switch ( format ) + { + case 0: /* format 0, that's simple */ + fdselect->data_size = num_glyphs; + goto Load_Data; + + case 3: /* format 3, a tad more complex */ + if ( FT_READ_USHORT( num_ranges ) ) + goto Exit; + + fdselect->data_size = num_ranges * 3 + 2; + + Load_Data: + if ( FT_FRAME_EXTRACT( fdselect->data_size, fdselect->data ) ) + goto Exit; + break; + + default: /* hmm... that's wrong */ + error = CFF_Err_Invalid_File_Format; + } + + Exit: + return error; + } + + + FT_LOCAL_DEF( FT_Byte ) + cff_fd_select_get( CFF_FDSelect fdselect, + FT_UInt glyph_index ) + { + FT_Byte fd = 0; + + + switch ( fdselect->format ) + { + case 0: + fd = fdselect->data[glyph_index]; + break; + + case 3: + /* first, compare to cache */ + if ( (FT_UInt)( glyph_index - fdselect->cache_first ) < + fdselect->cache_count ) + { + fd = fdselect->cache_fd; + break; + } + + /* then, lookup the ranges array */ + { + FT_Byte* p = fdselect->data; + FT_Byte* p_limit = p + fdselect->data_size; + FT_Byte fd2; + FT_UInt first, limit; + + + first = FT_NEXT_USHORT( p ); + do + { + if ( glyph_index < first ) + break; + + fd2 = *p++; + limit = FT_NEXT_USHORT( p ); + + if ( glyph_index < limit ) + { + fd = fd2; + + /* update cache */ + fdselect->cache_first = first; + fdselect->cache_count = limit-first; + fdselect->cache_fd = fd2; + break; + } + first = limit; + + } while ( p < p_limit ); + } + break; + + default: + ; + } + + return fd; + } + + + /*************************************************************************/ + /*************************************************************************/ + /*** ***/ + /*** CFF font support ***/ + /*** ***/ + /*************************************************************************/ + /*************************************************************************/ + + static void + cff_charset_done( CFF_Charset charset, + FT_Stream stream ) + { + FT_Memory memory = stream->memory; + + + FT_FREE( charset->sids ); + FT_FREE( charset->cids ); + charset->format = 0; + charset->offset = 0; + } + + + static FT_Error + cff_charset_load( CFF_Charset charset, + FT_UInt num_glyphs, + FT_Stream stream, + FT_ULong base_offset, + FT_ULong offset, + FT_Bool invert ) + { + FT_Memory memory = stream->memory; + FT_Error error = CFF_Err_Ok; + FT_UShort glyph_sid; + + + /* If the the offset is greater than 2, we have to parse the */ + /* charset table. */ + if ( offset > 2 ) + { + FT_UInt j; + + + charset->offset = base_offset + offset; + + /* Get the format of the table. */ + if ( FT_STREAM_SEEK( charset->offset ) || + FT_READ_BYTE( charset->format ) ) + goto Exit; + + /* Allocate memory for sids. */ + if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) + goto Exit; + + /* assign the .notdef glyph */ + charset->sids[0] = 0; + + switch ( charset->format ) + { + case 0: + if ( num_glyphs > 0 ) + { + if ( FT_FRAME_ENTER( ( num_glyphs - 1 ) * 2 ) ) + goto Exit; + + for ( j = 1; j < num_glyphs; j++ ) + charset->sids[j] = FT_GET_USHORT(); + + FT_FRAME_EXIT(); + } + 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 ( FT_READ_USHORT( glyph_sid ) ) + goto Exit; + + /* Read the number of glyphs in the range. */ + if ( charset->format == 2 ) + { + if ( FT_READ_USHORT( nleft ) ) + goto Exit; + } + else + { + if ( FT_READ_BYTE( nleft ) ) + goto Exit; + } + + /* Fill in the range of sids -- `nleft + 1' glyphs. */ + for ( i = 0; j < num_glyphs && i <= nleft; i++, j++, glyph_sid++ ) + charset->sids[j] = glyph_sid; + } + } + break; + + default: + FT_ERROR(( "cff_charset_load: 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. */ + + charset->offset = offset; /* record charset type */ + + switch ( (FT_UInt)offset ) + { + case 0: + if ( num_glyphs > 229 ) + { + FT_ERROR(( "cff_charset_load: implicit charset larger than\n" + "predefined charset (Adobe ISO-Latin)!\n" )); + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + + /* Allocate memory for sids. */ + if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) + goto Exit; + + /* Copy the predefined charset into the allocated memory. */ + FT_ARRAY_COPY( charset->sids, cff_isoadobe_charset, num_glyphs ); + + break; + + case 1: + if ( num_glyphs > 166 ) + { + FT_ERROR(( "cff_charset_load: implicit charset larger than\n" + "predefined charset (Adobe Expert)!\n" )); + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + + /* Allocate memory for sids. */ + if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) + goto Exit; + + /* Copy the predefined charset into the allocated memory. */ + FT_ARRAY_COPY( charset->sids, cff_expert_charset, num_glyphs ); + + break; + + case 2: + if ( num_glyphs > 87 ) + { + FT_ERROR(( "cff_charset_load: implicit charset larger than\n" + "predefined charset (Adobe Expert Subset)!\n" )); + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + + /* Allocate memory for sids. */ + if ( FT_NEW_ARRAY( charset->sids, num_glyphs ) ) + goto Exit; + + /* Copy the predefined charset into the allocated memory. */ + FT_ARRAY_COPY( charset->sids, cff_expertsubset_charset, num_glyphs ); + + break; + + default: + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + } + + /* we have to invert the `sids' array for subsetted CID-keyed fonts */ + if ( invert ) + { + FT_UInt i; + FT_UShort max_cid = 0; + + + for ( i = 0; i < num_glyphs; i++ ) + if ( charset->sids[i] > max_cid ) + max_cid = charset->sids[i]; + max_cid++; + + if ( FT_NEW_ARRAY( charset->cids, max_cid ) ) + goto Exit; + FT_MEM_ZERO( charset->cids, sizeof ( FT_UShort ) * max_cid ); + + for ( i = 0; i < num_glyphs; i++ ) + charset->cids[charset->sids[i]] = i; + } + + Exit: + /* Clean up if there was an error. */ + if ( error ) + { + FT_FREE( charset->sids ); + FT_FREE( charset->cids ); + charset->format = 0; + charset->offset = 0; + charset->sids = 0; + } + + return error; + } + + + static void + cff_encoding_done( CFF_Encoding encoding ) + { + encoding->format = 0; + encoding->offset = 0; + encoding->count = 0; + } + + + static FT_Error + cff_encoding_load( CFF_Encoding encoding, + CFF_Charset charset, + FT_UInt num_glyphs, + FT_Stream stream, + FT_ULong base_offset, + FT_ULong offset ) + { + FT_Error error = CFF_Err_Ok; + FT_UInt count; + FT_UInt j; + FT_UShort glyph_sid; + FT_UInt 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; + } + + /* Zero out the code to gid/sid mappings. */ + for ( j = 0; j < 256; j++ ) + { + encoding->sids [j] = 0; + encoding->codes[j] = 0; + } + + /* Note: The encoding table in a CFF font is indexed by glyph index; */ + /* the first encoded glyph index is 1. Hence, we read the character */ + /* 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 ( FT_STREAM_SEEK( encoding->offset ) || + FT_READ_BYTE( encoding->format ) || + FT_READ_BYTE( count ) ) + goto Exit; + + switch ( encoding->format & 0x7F ) + { + case 0: + { + FT_Byte* p; + + + /* By convention, GID 0 is always ".notdef" and is never */ + /* coded in the font. Hence, the number of codes found */ + /* in the table is `count+1'. */ + /* */ + encoding->count = count + 1; + + if ( FT_FRAME_ENTER( count ) ) + goto Exit; + + p = (FT_Byte*)stream->cursor; + + for ( j = 1; j <= count; j++ ) + { + glyph_code = *p++; + + /* Make sure j is not too big. */ + if ( j < num_glyphs ) + { + /* Assign code to GID mapping. */ + encoding->codes[glyph_code] = (FT_UShort)j; + + /* Assign code to SID mapping. */ + encoding->sids[glyph_code] = charset->sids[j]; + } + } + + FT_FRAME_EXIT(); + } + break; + + case 1: + { + FT_UInt nleft; + FT_UInt i = 1; + FT_UInt k; + + + encoding->count = 0; + + /* Parse the Format1 ranges. */ + for ( j = 0; j < count; j++, i += nleft ) + { + /* Read the first glyph code of the range. */ + if ( FT_READ_BYTE( glyph_code ) ) + goto Exit; + + /* Read the number of codes in the range. */ + if ( FT_READ_BYTE( nleft ) ) + goto Exit; + + /* Increment nleft, so we read `nleft + 1' codes/sids. */ + nleft++; + + /* compute max number of character codes */ + if ( (FT_UInt)nleft > encoding->count ) + encoding->count = 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 && glyph_code < 256 ) + { + /* Assign code to GID mapping. */ + encoding->codes[glyph_code] = (FT_UShort)k; + + /* Assign code to SID mapping. */ + encoding->sids[glyph_code] = charset->sids[k]; + } + } + } + + /* simple check; one never knows what can be found in a font */ + if ( encoding->count > 256 ) + encoding->count = 256; + } + break; + + default: + FT_ERROR(( "cff_encoding_load: invalid table format!\n" )); + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + + /* Parse supplemental encodings, if any. */ + if ( encoding->format & 0x80 ) + { + FT_UInt gindex; + + + /* count supplements */ + if ( FT_READ_BYTE( count ) ) + goto Exit; + + for ( j = 0; j < count; j++ ) + { + /* Read supplemental glyph code. */ + if ( FT_READ_BYTE( glyph_code ) ) + goto Exit; + + /* Read the SID associated with this glyph code. */ + if ( FT_READ_USHORT( glyph_sid ) ) + goto Exit; + + /* Assign code to SID mapping. */ + encoding->sids[glyph_code] = glyph_sid; + + /* First, look up GID which has been assigned to */ + /* SID glyph_sid. */ + for ( gindex = 0; gindex < num_glyphs; gindex++ ) + { + if ( charset->sids[gindex] == glyph_sid ) + { + encoding->codes[glyph_code] = (FT_UShort)gindex; + break; + } + } + } + } + } + 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 ( (FT_UInt)offset ) + { + case 0: + /* First, copy the code to SID mapping. */ + FT_ARRAY_COPY( encoding->sids, cff_standard_encoding, 256 ); + goto Populate; + + case 1: + /* First, copy the code to SID mapping. */ + FT_ARRAY_COPY( encoding->sids, cff_expert_encoding, 256 ); + + Populate: + /* Construct code to GID mapping from code to SID mapping */ + /* and charset. */ + + encoding->count = 0; + + 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; + + /* update encoding count */ + if ( encoding->count < j + 1 ) + encoding->count = j + 1; + } + } + } + break; + + default: + FT_ERROR(( "cff_encoding_load: invalid table format!\n" )); + error = CFF_Err_Invalid_File_Format; + goto Exit; + } + } + + Exit: + + /* Clean up if there was an error. */ + return error; + } + + + static FT_Error + cff_subfont_load( CFF_SubFont font, + CFF_Index idx, + FT_UInt font_index, + FT_Stream stream, + FT_ULong base_offset ) + { + FT_Error error; + CFF_ParserRec parser; + FT_Byte* dict = NULL; + FT_ULong dict_len; + CFF_FontRecDict top = &font->font_dict; + CFF_Private priv = &font->private_dict; + + + cff_parser_init( &parser, CFF_CODE_TOPDICT, &font->font_dict ); + + /* set defaults */ + FT_MEM_ZERO( top, sizeof ( *top ) ); + + top->underline_position = -100L << 16; + top->underline_thickness = 50L << 16; + top->charstring_type = 2; + top->font_matrix.xx = 0x10000L; + top->font_matrix.yy = 0x10000L; + top->cid_count = 8720; + + /* we use the implementation specific SID value 0xFFFF to indicate */ + /* missing entries */ + top->version = 0xFFFFU; + top->notice = 0xFFFFU; + top->copyright = 0xFFFFU; + top->full_name = 0xFFFFU; + top->family_name = 0xFFFFU; + top->weight = 0xFFFFU; + top->embedded_postscript = 0xFFFFU; + + top->cid_registry = 0xFFFFU; + top->cid_ordering = 0xFFFFU; + top->cid_font_name = 0xFFFFU; + + error = cff_index_access_element( idx, font_index, &dict, &dict_len ) || + cff_parser_run( &parser, dict, dict + dict_len ); + + cff_index_forget_element( idx, &dict ); + + if ( error ) + goto Exit; + + /* if it is a CID font, we stop there */ + if ( top->cid_registry != 0xFFFFU ) + goto Exit; + + /* parse the private dictionary, if any */ + if ( top->private_offset && top->private_size ) + { + /* set defaults */ + FT_MEM_ZERO( priv, 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 * 1000 ); + + cff_parser_init( &parser, CFF_CODE_PRIVATE, priv ); + + if ( FT_STREAM_SEEK( base_offset + font->font_dict.private_offset ) || + FT_FRAME_ENTER( font->font_dict.private_size ) ) + goto Exit; + + error = cff_parser_run( &parser, + (FT_Byte*)stream->cursor, + (FT_Byte*)stream->limit ); + FT_FRAME_EXIT(); + if ( error ) + goto Exit; + } + + /* read the local subrs, if any */ + if ( priv->local_subrs_offset ) + { + if ( FT_STREAM_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_index_get_pointers( &font->local_subrs_index, + &font->local_subrs ); + if ( error ) + goto Exit; + } + + Exit: + return error; + } + + + static void + cff_subfont_done( FT_Memory memory, + CFF_SubFont subfont ) + { + if ( subfont ) + { + cff_done_index( &subfont->local_subrs_index ); + FT_FREE( subfont->local_subrs ); + } + } + + + FT_LOCAL_DEF( FT_Error ) + cff_font_load( 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_FontRec + + 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_FontRecDict dict; + + FT_ZERO( font ); + + font->stream = stream; + font->memory = memory; + dict = &font->top_font.font_dict; + base_offset = FT_STREAM_POS(); + + /* read CFF font header */ + if ( FT_STREAM_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 ( FT_STREAM_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_font_load: 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_subfont_load( &font->top_font, + &font->font_dict_index, + face_index, + stream, + base_offset ); + if ( error ) + goto Exit; + + if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) ) + goto Exit; + + error = cff_new_index( &font->charstrings_index, stream, 0 ); + if ( error ) + goto Exit; + + /* now, check for a CID font */ + if ( dict->cid_registry != 0xFFFFU ) + { + CFF_IndexRec fd_index; + CFF_SubFont sub; + FT_UInt idx; + + + /* this is a CID-keyed font, we must now allocate a table of */ + /* sub-fonts, then load each of them separately */ + if ( FT_STREAM_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_font_load: FD array too large in CID font\n" )); + goto Fail_CID; + } + + /* allocate & read each font dict independently */ + font->num_subfonts = fd_index.count; + if ( FT_NEW_ARRAY( sub, fd_index.count ) ) + goto Fail_CID; + + /* setup pointer table */ + for ( idx = 0; idx < fd_index.count; idx++ ) + font->subfonts[idx] = sub + idx; + + /* now load each sub font independently */ + for ( idx = 0; idx < fd_index.count; idx++ ) + { + sub = font->subfonts[idx]; + error = cff_subfont_load( sub, &fd_index, idx, + stream, base_offset ); + if ( error ) + goto Fail_CID; + } + + /* now load the FD Select array */ + error = CFF_Load_FD_Select( &font->fd_select, + font->charstrings_index.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_font_load: no charstrings offset!\n" )); + error = CFF_Err_Unknown_File_Format; + goto Exit; + } + + /* explicit the global subrs */ + font->num_global_subrs = font->global_subrs_index.count; + font->num_glyphs = font->charstrings_index.count; + + error = cff_index_get_pointers( &font->global_subrs_index, + &font->global_subrs ) ; + + if ( error ) + goto Exit; + + /* read the Charset and Encoding tables if available */ + if ( font->num_glyphs > 0 ) + { + FT_Bool invert; + + + invert = dict->cid_registry != 0xFFFFU && + font->charstrings_index.count != dict->cid_count; + error = cff_charset_load( &font->charset, font->num_glyphs, stream, + base_offset, dict->charset_offset, invert ); + if ( error ) + goto Exit; + + /* CID-keyed CFFs don't have an encoding */ + if ( dict->cid_registry == 0xFFFFU ) + { + error = cff_encoding_load( &font->encoding, + &font->charset, + font->num_glyphs, + stream, + base_offset, + dict->encoding_offset ); + if ( error ) + goto Exit; + } + else + /* CID-keyed fonts only need CIDs */ + FT_FREE( font->charset.sids ); + } + + /* get the font name (/CIDFontName for CID-keyed fonts, */ + /* /FontName otherwise) */ + font->font_name = cff_index_get_name( &font->name_index, face_index ); + + Exit: + return error; + } + + + FT_LOCAL_DEF( void ) + cff_font_done( CFF_Font font ) + { + FT_Memory memory = font->memory; + FT_UInt idx; + + + 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 ( idx = 0; idx < font->num_subfonts; idx++ ) + cff_subfont_done( memory, font->subfonts[idx] ); + + FT_FREE( font->subfonts ); + } + + cff_encoding_done( &font->encoding ); + cff_charset_done( &font->charset, font->stream ); + + cff_subfont_done( memory, &font->top_font ); + + CFF_Done_FD_Select( &font->fd_select, font->stream ); + + FT_FREE( font->global_subrs ); + FT_FREE( font->font_name ); + } + + +/* END */ |