diff -r 92af50454cf2 -r 8054d9d775fd misc/libfreetype/src/cff/cffload.c --- a/misc/libfreetype/src/cff/cffload.c Fri Oct 11 11:55:31 2013 +0200 +++ /dev/null Thu Jan 01 00:00:00 1970 +0000 @@ -1,1661 +0,0 @@ -/***************************************************************************/ -/* */ -/* cffload.c */ -/* */ -/* OpenType and CFF data/program tables loader (body). */ -/* */ -/* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */ -/* 2010 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 -#include FT_INTERNAL_DEBUG_H -#include FT_INTERNAL_OBJECTS_H -#include FT_INTERNAL_STREAM_H -#include FT_TRUETYPE_TAGS_H -#include FT_TYPE1_TABLES_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 /* 1 */ - - - 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 an offset from the index's stream current position */ - static FT_ULong - cff_index_read_offset( CFF_Index idx, - FT_Error *errorp ) - { - FT_Error error; - FT_Stream stream = idx->stream; - FT_Byte tmp[4]; - FT_ULong result = 0; - - - if ( !FT_STREAM_READ( tmp, idx->off_size ) ) - { - FT_Int nn; - - - for ( nn = 0; nn < idx->off_size; nn++ ) - result = ( result << 8 ) | tmp[nn]; - } - - *errorp = error; - return result; - } - - - static FT_Error - cff_index_init( 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; - idx->start = FT_STREAM_POS(); - if ( !FT_READ_USHORT( count ) && - count > 0 ) - { - FT_Byte offsize; - FT_ULong size; - - - /* 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; - - if ( offsize < 1 || offsize > 4 ) - { - error = CFF_Err_Invalid_Table; - goto Exit; - } - - idx->count = count; - idx->off_size = offsize; - size = (FT_ULong)( count + 1 ) * offsize; - - idx->data_offset = idx->start + 3 + size; - - if ( FT_STREAM_SKIP( size - offsize ) ) - goto Exit; - - size = cff_index_read_offset( idx, &error ); - if ( error ) - goto Exit; - - if ( size == 0 ) - { - error = CFF_Err_Invalid_Table; - goto Exit; - } - - idx->data_size = --size; - - if ( load ) - { - /* load the data */ - if ( FT_FRAME_EXTRACT( size, idx->bytes ) ) - goto Exit; - } - else - { - /* skip the data */ - if ( FT_STREAM_SKIP( size ) ) - goto Exit; - } - } - - Exit: - if ( error ) - FT_FREE( idx->offsets ); - - return error; - } - - - static void - cff_index_done( 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 ) ); - } - } - - - static FT_Error - cff_index_load_offsets( CFF_Index idx ) - { - FT_Error error = CFF_Err_Ok; - FT_Stream stream = idx->stream; - FT_Memory memory = stream->memory; - - - if ( idx->count > 0 && idx->offsets == NULL ) - { - FT_Byte offsize = idx->off_size; - FT_ULong data_size; - FT_Byte* p; - FT_Byte* p_end; - FT_ULong* poff; - - - data_size = (FT_ULong)( idx->count + 1 ) * offsize; - - if ( FT_NEW_ARRAY( idx->offsets, idx->count + 1 ) || - FT_STREAM_SEEK( idx->start + 3 ) || - FT_FRAME_ENTER( data_size ) ) - goto Exit; - - poff = idx->offsets; - p = (FT_Byte*)stream->cursor; - p_end = p + data_size; - - switch ( offsize ) - { - case 1: - for ( ; p < p_end; p++, poff++ ) - poff[0] = p[0]; - break; - - case 2: - for ( ; p < p_end; p += 2, poff++ ) - poff[0] = FT_PEEK_USHORT( p ); - break; - - case 3: - for ( ; p < p_end; p += 3, poff++ ) - poff[0] = FT_PEEK_OFF3( p ); - break; - - default: - for ( ; p < p_end; p += 4, poff++ ) - poff[0] = FT_PEEK_ULONG( p ); - } - - FT_FRAME_EXIT(); - } - - Exit: - if ( error ) - FT_FREE( idx->offsets ); - - return error; - } - - - /* Allocate a table containing pointers to an index's elements. */ - /* The `pool' argument makes this function convert the index */ - /* entries to C-style strings (this is, NULL-terminated). */ - static FT_Error - cff_index_get_pointers( CFF_Index idx, - FT_Byte*** table, - FT_Byte** pool ) - { - FT_Error error = CFF_Err_Ok; - FT_Memory memory = idx->stream->memory; - FT_Byte** t; - FT_Byte* new_bytes = NULL; - - - *table = NULL; - - if ( idx->offsets == NULL ) - { - error = cff_index_load_offsets( idx ); - if ( error ) - goto Exit; - } - - if ( idx->count > 0 && - !FT_NEW_ARRAY( t, idx->count + 1 ) && - ( !pool || !FT_ALLOC( new_bytes, - idx->data_size + idx->count ) ) ) - { - FT_ULong n, cur_offset; - FT_ULong extra = 0; - FT_Byte* org_bytes = idx->bytes; - - - /* at this point, `idx->offsets' can't be NULL */ - cur_offset = idx->offsets[0] - 1; - - /* sanity check */ - if ( cur_offset >= idx->data_size ) - { - FT_TRACE0(( "cff_index_get_pointers:" - " invalid first offset value %d set to zero\n", - cur_offset )); - cur_offset = 0; - } - - if ( !pool ) - t[0] = org_bytes + cur_offset; - else - t[0] = new_bytes + cur_offset; - - for ( n = 1; n <= idx->count; n++ ) - { - FT_ULong next_offset = idx->offsets[n] - 1; - - - /* empty slot + two sanity checks for invalid offset tables */ - if ( next_offset == 0 || - next_offset < cur_offset || - ( next_offset >= idx->data_size && n < idx->count ) ) - next_offset = cur_offset; - - if ( !pool ) - t[n] = org_bytes + next_offset; - else - { - t[n] = new_bytes + next_offset + extra; - - if ( next_offset != cur_offset ) - { - FT_MEM_COPY( t[n - 1], org_bytes + cur_offset, t[n] - t[n - 1] ); - t[n][0] = '\0'; - t[n] += 1; - extra++; - } - } - - cur_offset = next_offset; - } - *table = t; - - if ( pool ) - *pool = new_bytes; - } - - Exit: - 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_Stream stream = idx->stream; - FT_ULong off1, off2 = 0; - - - /* load offsets from file or the offset table */ - if ( !idx->offsets ) - { - FT_ULong pos = element * idx->off_size; - - - if ( FT_STREAM_SEEK( idx->start + 3 + pos ) ) - goto Exit; - - off1 = cff_index_read_offset( idx, &error ); - if ( error ) - goto Exit; - - if ( off1 != 0 ) - { - do - { - element++; - off2 = cff_index_read_offset( idx, &error ); - } - while ( off2 == 0 && element < idx->count ); - } - } - else /* use offsets table */ - { - off1 = idx->offsets[element]; - if ( off1 ) - { - do - { - element++; - off2 = idx->offsets[element]; - - } while ( off2 == 0 && element < idx->count ); - } - } - - /* XXX: should check off2 does not exceed the end of this entry; */ - /* at present, only truncate off2 at the end of this stream */ - if ( off2 > stream->size + 1 || - idx->data_offset > stream->size - off2 + 1 ) - { - FT_ERROR(( "cff_index_access_element:" - " offset to next entry (%d)" - " exceeds the end of stream (%d)\n", - off2, stream->size - idx->data_offset + 1 )); - off2 = stream->size - idx->data_offset + 1; - } - - /* access element */ - if ( off1 && off2 > 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 */ - 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 ); - } - } - - - /* get an entry from Name INDEX */ - FT_LOCAL_DEF( FT_String* ) - cff_index_get_name( CFF_Font font, - FT_UInt element ) - { - CFF_Index idx = &font->name_index; - 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; - } - - - /* get an entry from String INDEX */ - FT_LOCAL_DEF( FT_String* ) - cff_index_get_string( CFF_Font font, - FT_UInt element ) - { - return ( element < font->num_strings ) - ? (FT_String*)font->strings[element] - : NULL; - } - - - FT_LOCAL_DEF( FT_String* ) - cff_index_get_sid_string( CFF_Font font, - FT_UInt sid ) - { - /* value 0xFFFFU indicates a missing dictionary entry */ - if ( sid == 0xFFFFU ) - return NULL; - - /* if it is not a standard string, return it */ - if ( sid > 390 ) - return cff_index_get_string( font, sid - 391 ); - - /* CID-keyed CFF fonts don't have glyph names */ - if ( !font->psnames ) - return NULL; - - /* this is a standard string */ - return (FT_String *)font->psnames->adobe_std_strings( sid ); - } - - - /*************************************************************************/ - /*************************************************************************/ - /*** ***/ - /*** 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 FT_Error - cff_charset_compute_cids( CFF_Charset charset, - FT_UInt num_glyphs, - FT_Memory memory ) - { - FT_Error error = CFF_Err_Ok; - FT_UInt i; - FT_Long j; - FT_UShort max_cid = 0; - - - if ( charset->max_cid > 0 ) - goto Exit; - - for ( i = 0; i < num_glyphs; i++ ) - { - if ( charset->sids[i] > max_cid ) - max_cid = charset->sids[i]; - } - - if ( FT_NEW_ARRAY( charset->cids, (FT_ULong)max_cid + 1 ) ) - goto Exit; - - /* When multiple GIDs map to the same CID, we choose the lowest */ - /* GID. This is not described in any spec, but it matches the */ - /* behaviour of recent Acroread versions. */ - for ( j = num_glyphs - 1; j >= 0 ; j-- ) - charset->cids[charset->sids[j]] = (FT_UShort)j; - - charset->max_cid = max_cid; - charset->num_glyphs = num_glyphs; - - Exit: - return error; - } - - - FT_LOCAL_DEF( FT_UInt ) - cff_charset_cid_to_gindex( CFF_Charset charset, - FT_UInt cid ) - { - FT_UInt result = 0; - - - if ( cid <= charset->max_cid ) - result = charset->cids[cid]; - - return result; - } - - - static void - cff_charset_free_cids( CFF_Charset charset, - FT_Memory memory ) - { - FT_FREE( charset->cids ); - charset->max_cid = 0; - } - - - static void - cff_charset_done( CFF_Charset charset, - FT_Stream stream ) - { - FT_Memory memory = stream->memory; - - - cff_charset_free_cids( charset, memory ); - - FT_FREE( charset->sids ); - 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; - } - - /* try to rescue some of the SIDs if `nleft' is too large */ - if ( glyph_sid > 0xFFFFL - nleft ) - { - FT_ERROR(( "cff_charset_load: invalid SID range trimmed" - " nleft=%d -> %d\n", nleft, 0xFFFFL - glyph_sid )); - nleft = ( FT_UInt )( 0xFFFFL - glyph_sid ); - } - - /* 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 ) - error = cff_charset_compute_cids( charset, num_glyphs, memory ); - - 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 - { - /* 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; - - error = cff_charset_compute_cids( charset, num_glyphs, - stream->memory ); - if ( error ) - goto Exit; - - for ( j = 0; j < 256; j++ ) - { - FT_UInt sid = encoding->sids[j]; - FT_UInt gid = 0; - - - if ( sid ) - gid = cff_charset_cid_to_gindex( charset, sid ); - - if ( gid != 0 ) - { - encoding->codes[j] = (FT_UShort)gid; - encoding->count = j + 1; - } - else - { - encoding->codes[j] = 0; - encoding->sids [j] = 0; - } - } - 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_Library library ) - { - 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, library ); - - /* 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 ); - if ( !error ) - error = 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, library ); - - 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; - - /* ensure that `num_blue_values' is even */ - priv->num_blue_values &= ~1; - } - - /* 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_index_init( &font->local_subrs_index, stream, 1 ); - if ( error ) - goto Exit; - - error = cff_index_get_pointers( &font->local_subrs_index, - &font->local_subrs, NULL ); - if ( error ) - goto Exit; - } - - Exit: - return error; - } - - - static void - cff_subfont_done( FT_Memory memory, - CFF_SubFont subfont ) - { - if ( subfont ) - { - cff_index_done( &subfont->local_subrs_index ); - FT_FREE( subfont->local_subrs ); - } - } - - - FT_LOCAL_DEF( FT_Error ) - cff_font_load( FT_Library library, - FT_Stream stream, - FT_Int face_index, - CFF_Font font, - FT_Bool pure_cff ) - { - 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; - CFF_IndexRec string_index; - - - FT_ZERO( font ); - FT_ZERO( &string_index ); - - 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_index_init( &font->name_index, - stream, 0 ) ) || - FT_SET_ERROR( cff_index_init( &font->font_dict_index, - stream, 0 ) ) || - FT_SET_ERROR( cff_index_init( &string_index, - stream, 1 ) ) || - FT_SET_ERROR( cff_index_init( &font->global_subrs_index, - stream, 1 ) ) || - FT_SET_ERROR( cff_index_get_pointers( &string_index, - &font->strings, - &font->string_pool ) ) ) - goto Exit; - - font->num_strings = string_index.count; - - /* 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, - library ); - if ( error ) - goto Exit; - - if ( FT_STREAM_SEEK( base_offset + dict->charstrings_offset ) ) - goto Exit; - - error = cff_index_init( &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_index_init( &fd_index, stream, 0 ); - if ( error ) - goto Exit; - - if ( fd_index.count > CFF_MAX_CID_FONTS ) - { - FT_TRACE0(( "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; - - /* set up pointer table */ - for ( idx = 0; idx < fd_index.count; idx++ ) - font->subfonts[idx] = sub + idx; - - /* now load each subfont independently */ - for ( idx = 0; idx < fd_index.count; idx++ ) - { - sub = font->subfonts[idx]; - error = cff_subfont_load( sub, &fd_index, idx, - stream, base_offset, library ); - 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_index_done( &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; - } - - font->num_glyphs = font->charstrings_index.count; - - error = cff_index_get_pointers( &font->global_subrs_index, - &font->global_subrs, NULL ); - - if ( error ) - goto Exit; - - /* read the Charset and Encoding tables if available */ - if ( font->num_glyphs > 0 ) - { - FT_Bool invert = FT_BOOL( dict->cid_registry != 0xFFFFU && pure_cff ); - - - 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; - } - } - - /* get the font name (/CIDFontName for CID-keyed fonts, */ - /* /FontName otherwise) */ - font->font_name = cff_index_get_name( font, face_index ); - - Exit: - cff_index_done( &string_index ); - - return error; - } - - - FT_LOCAL_DEF( void ) - cff_font_done( CFF_Font font ) - { - FT_Memory memory = font->memory; - FT_UInt idx; - - - cff_index_done( &font->global_subrs_index ); - cff_index_done( &font->font_dict_index ); - cff_index_done( &font->name_index ); - cff_index_done( &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] ); - - /* the subfonts array has been allocated as a single block */ - FT_FREE( font->subfonts[0] ); - } - - 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->font_info ); - - FT_FREE( font->font_name ); - FT_FREE( font->global_subrs ); - FT_FREE( font->strings ); - FT_FREE( font->string_pool ); - } - - -/* END */