| /**************************************************************************** |
| * |
| * cidload.c |
| * |
| * CID-keyed Type1 font loader (body). |
| * |
| * Copyright (C) 1996-2022 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 <freetype/internal/ftdebug.h> |
| #include FT_CONFIG_CONFIG_H |
| #include <freetype/ftmm.h> |
| #include <freetype/internal/t1types.h> |
| #include <freetype/internal/psaux.h> |
| |
| #include "cidload.h" |
| |
| #include "ciderrs.h" |
| |
| |
| /************************************************************************** |
| * |
| * 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 cidload |
| |
| |
| /* read a single offset */ |
| FT_LOCAL_DEF( FT_ULong ) |
| cid_get_offset( FT_Byte* *start, |
| FT_UInt offsize ) |
| { |
| FT_ULong result; |
| FT_Byte* p = *start; |
| |
| |
| for ( result = 0; offsize > 0; offsize-- ) |
| { |
| result <<= 8; |
| result |= *p++; |
| } |
| |
| *start = p; |
| return result; |
| } |
| |
| |
| /*************************************************************************/ |
| /*************************************************************************/ |
| /***** *****/ |
| /***** TYPE 1 SYMBOL PARSING *****/ |
| /***** *****/ |
| /*************************************************************************/ |
| /*************************************************************************/ |
| |
| |
| static FT_Error |
| cid_load_keyword( CID_Face face, |
| CID_Loader* loader, |
| const T1_Field keyword ) |
| { |
| FT_Error error; |
| CID_Parser* parser = &loader->parser; |
| FT_Byte* object; |
| void* dummy_object; |
| CID_FaceInfo cid = &face->cid; |
| |
| |
| /* if the keyword has a dedicated callback, call it */ |
| if ( keyword->type == T1_FIELD_TYPE_CALLBACK ) |
| { |
| FT_TRACE4(( " %s", keyword->ident )); |
| |
| keyword->reader( (FT_Face)face, parser ); |
| error = parser->root.error; |
| goto Exit; |
| } |
| |
| /* we must now compute the address of our target object */ |
| switch ( keyword->location ) |
| { |
| case T1_FIELD_LOCATION_CID_INFO: |
| object = (FT_Byte*)cid; |
| break; |
| |
| case T1_FIELD_LOCATION_FONT_INFO: |
| object = (FT_Byte*)&cid->font_info; |
| break; |
| |
| case T1_FIELD_LOCATION_FONT_EXTRA: |
| object = (FT_Byte*)&face->font_extra; |
| break; |
| |
| case T1_FIELD_LOCATION_BBOX: |
| object = (FT_Byte*)&cid->font_bbox; |
| break; |
| |
| default: |
| { |
| CID_FaceDict dict; |
| |
| |
| if ( parser->num_dict >= cid->num_dicts ) |
| { |
| FT_ERROR(( "cid_load_keyword: invalid use of `%s'\n", |
| keyword->ident )); |
| error = FT_THROW( Syntax_Error ); |
| goto Exit; |
| } |
| |
| dict = cid->font_dicts + parser->num_dict; |
| switch ( keyword->location ) |
| { |
| case T1_FIELD_LOCATION_PRIVATE: |
| object = (FT_Byte*)&dict->private_dict; |
| break; |
| |
| default: |
| object = (FT_Byte*)dict; |
| } |
| } |
| } |
| |
| FT_TRACE4(( " %s", keyword->ident )); |
| |
| dummy_object = object; |
| |
| /* now, load the keyword data in the object's field(s) */ |
| if ( keyword->type == T1_FIELD_TYPE_INTEGER_ARRAY || |
| keyword->type == T1_FIELD_TYPE_FIXED_ARRAY ) |
| error = cid_parser_load_field_table( &loader->parser, keyword, |
| &dummy_object ); |
| else |
| error = cid_parser_load_field( &loader->parser, |
| keyword, &dummy_object ); |
| |
| FT_TRACE4(( "\n" )); |
| |
| Exit: |
| return error; |
| } |
| |
| |
| FT_CALLBACK_DEF( void ) |
| cid_parse_font_matrix( CID_Face face, |
| CID_Parser* parser ) |
| { |
| CID_FaceDict dict; |
| FT_Face root = (FT_Face)&face->root; |
| FT_Fixed temp[6]; |
| FT_Fixed temp_scale; |
| |
| |
| if ( parser->num_dict < face->cid.num_dicts ) |
| { |
| FT_Matrix* matrix; |
| FT_Vector* offset; |
| FT_Int result; |
| |
| |
| dict = face->cid.font_dicts + parser->num_dict; |
| matrix = &dict->font_matrix; |
| offset = &dict->font_offset; |
| |
| /* input is scaled by 1000 to accommodate default FontMatrix */ |
| result = cid_parser_to_fixed_array( parser, 6, temp, 3 ); |
| |
| if ( result < 6 ) |
| { |
| FT_ERROR(( "cid_parse_font_matrix: not enough matrix elements\n" )); |
| goto Exit; |
| } |
| |
| FT_TRACE4(( " [%f %f %f %f %f %f]\n", |
| (double)temp[0] / 65536 / 1000, |
| (double)temp[1] / 65536 / 1000, |
| (double)temp[2] / 65536 / 1000, |
| (double)temp[3] / 65536 / 1000, |
| (double)temp[4] / 65536 / 1000, |
| (double)temp[5] / 65536 / 1000 )); |
| |
| temp_scale = FT_ABS( temp[3] ); |
| |
| if ( temp_scale == 0 ) |
| { |
| FT_ERROR(( "cid_parse_font_matrix: invalid font matrix\n" )); |
| goto Exit; |
| } |
| |
| /* atypical case */ |
| if ( temp_scale != 0x10000L ) |
| { |
| /* set units per EM based on FontMatrix values */ |
| root->units_per_EM = (FT_UShort)FT_DivFix( 1000, temp_scale ); |
| |
| temp[0] = FT_DivFix( temp[0], temp_scale ); |
| temp[1] = FT_DivFix( temp[1], temp_scale ); |
| temp[2] = FT_DivFix( temp[2], temp_scale ); |
| temp[4] = FT_DivFix( temp[4], temp_scale ); |
| temp[5] = FT_DivFix( temp[5], temp_scale ); |
| temp[3] = temp[3] < 0 ? -0x10000L : 0x10000L; |
| } |
| |
| matrix->xx = temp[0]; |
| matrix->yx = temp[1]; |
| matrix->xy = temp[2]; |
| matrix->yy = temp[3]; |
| |
| if ( !FT_Matrix_Check( matrix ) ) |
| { |
| FT_ERROR(( "t1_parse_font_matrix: invalid font matrix\n" )); |
| parser->root.error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| /* note that the font offsets are expressed in integer font units */ |
| offset->x = temp[4] >> 16; |
| offset->y = temp[5] >> 16; |
| } |
| |
| Exit: |
| return; |
| } |
| |
| |
| FT_CALLBACK_DEF( void ) |
| parse_fd_array( CID_Face face, |
| CID_Parser* parser ) |
| { |
| CID_FaceInfo cid = &face->cid; |
| FT_Memory memory = face->root.memory; |
| FT_Stream stream = parser->stream; |
| FT_Error error = FT_Err_Ok; |
| FT_Long num_dicts, max_dicts; |
| |
| |
| num_dicts = cid_parser_to_int( parser ); |
| if ( num_dicts < 0 || num_dicts > FT_INT_MAX ) |
| { |
| FT_ERROR(( "parse_fd_array: invalid number of dictionaries\n" )); |
| goto Exit; |
| } |
| |
| FT_TRACE4(( " %ld\n", num_dicts )); |
| |
| /* |
| * A single entry in the FDArray must (at least) contain the following |
| * structure elements. |
| * |
| * %ADOBeginFontDict 18 |
| * X dict begin 13 |
| * /FontMatrix [X X X X] 22 |
| * /Private X dict begin 22 |
| * end 4 |
| * end 4 |
| * %ADOEndFontDict 16 |
| * |
| * This needs 18+13+22+22+4+4+16=99 bytes or more. Normally, you also |
| * need a `dup X' at the very beginning and a `put' at the end, so a |
| * rough guess using 100 bytes as the minimum is justified. |
| */ |
| max_dicts = (FT_Long)( stream->size / 100 ); |
| if ( num_dicts > max_dicts ) |
| { |
| FT_TRACE0(( "parse_fd_array: adjusting FDArray size" |
| " (from %ld to %ld)\n", |
| num_dicts, max_dicts )); |
| num_dicts = max_dicts; |
| } |
| |
| if ( !cid->font_dicts ) |
| { |
| FT_UInt n; |
| |
| |
| if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) ) |
| goto Exit; |
| |
| cid->num_dicts = num_dicts; |
| |
| /* set some default values (the same as for Type 1 fonts) */ |
| for ( n = 0; n < cid->num_dicts; n++ ) |
| { |
| CID_FaceDict dict = cid->font_dicts + n; |
| |
| |
| dict->private_dict.blue_shift = 7; |
| dict->private_dict.blue_fuzz = 1; |
| dict->private_dict.lenIV = 4; |
| dict->private_dict.expansion_factor = (FT_Fixed)( 0.06 * 0x10000L ); |
| dict->private_dict.blue_scale = (FT_Fixed)( |
| 0.039625 * 0x10000L * 1000 ); |
| } |
| } |
| |
| Exit: |
| return; |
| } |
| |
| |
| /* By mistake, `expansion_factor' appears both in PS_PrivateRec */ |
| /* and CID_FaceDictRec (both are public header files and can't */ |
| /* changed). We simply copy the value. */ |
| |
| FT_CALLBACK_DEF( void ) |
| parse_expansion_factor( CID_Face face, |
| CID_Parser* parser ) |
| { |
| CID_FaceDict dict; |
| |
| |
| if ( parser->num_dict < face->cid.num_dicts ) |
| { |
| dict = face->cid.font_dicts + parser->num_dict; |
| |
| dict->expansion_factor = cid_parser_to_fixed( parser, 0 ); |
| dict->private_dict.expansion_factor = dict->expansion_factor; |
| |
| FT_TRACE4(( "%ld\n", dict->expansion_factor )); |
| } |
| |
| return; |
| } |
| |
| |
| /* By mistake, `CID_FaceDictRec' doesn't contain a field for the */ |
| /* `FontName' keyword. FreeType doesn't need it, but it is nice */ |
| /* to catch it for producing better trace output. */ |
| |
| FT_CALLBACK_DEF( void ) |
| parse_font_name( CID_Face face, |
| CID_Parser* parser ) |
| { |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| if ( parser->num_dict < face->cid.num_dicts ) |
| { |
| T1_TokenRec token; |
| FT_UInt len; |
| |
| |
| cid_parser_to_token( parser, &token ); |
| |
| len = (FT_UInt)( token.limit - token.start ); |
| if ( len ) |
| FT_TRACE4(( " %.*s\n", len, token.start )); |
| else |
| FT_TRACE4(( " <no value>\n" )); |
| } |
| #else |
| FT_UNUSED( face ); |
| FT_UNUSED( parser ); |
| #endif |
| |
| return; |
| } |
| |
| |
| static |
| const T1_FieldRec cid_field_records[] = |
| { |
| |
| #include "cidtoken.h" |
| |
| T1_FIELD_CALLBACK( "FDArray", parse_fd_array, 0 ) |
| T1_FIELD_CALLBACK( "FontMatrix", cid_parse_font_matrix, 0 ) |
| T1_FIELD_CALLBACK( "ExpansionFactor", parse_expansion_factor, 0 ) |
| T1_FIELD_CALLBACK( "FontName", parse_font_name, 0 ) |
| |
| { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0, 0 } |
| }; |
| |
| |
| static FT_Error |
| cid_parse_dict( CID_Face face, |
| CID_Loader* loader, |
| FT_Byte* base, |
| FT_ULong size ) |
| { |
| CID_Parser* parser = &loader->parser; |
| |
| |
| parser->root.cursor = base; |
| parser->root.limit = base + size; |
| parser->root.error = FT_Err_Ok; |
| |
| { |
| FT_Byte* cur = base; |
| FT_Byte* limit = cur + size; |
| |
| |
| for (;;) |
| { |
| FT_Byte* newlimit; |
| |
| |
| parser->root.cursor = cur; |
| cid_parser_skip_spaces( parser ); |
| |
| if ( parser->root.cursor >= limit ) |
| newlimit = limit - 1 - 17; |
| else |
| newlimit = parser->root.cursor - 17; |
| |
| /* look for `%ADOBeginFontDict' */ |
| for ( ; cur < newlimit; cur++ ) |
| { |
| if ( *cur == '%' && |
| ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 ) |
| { |
| /* if /FDArray was found, then cid->num_dicts is > 0, and */ |
| /* we can start increasing parser->num_dict */ |
| if ( face->cid.num_dicts > 0 ) |
| { |
| parser->num_dict++; |
| |
| #ifdef FT_DEBUG_LEVEL_TRACE |
| FT_TRACE4(( " FontDict %u", parser->num_dict )); |
| if ( parser->num_dict > face->cid.num_dicts ) |
| FT_TRACE4(( " (ignored)" )); |
| FT_TRACE4(( "\n" )); |
| #endif |
| } |
| } |
| } |
| |
| cur = parser->root.cursor; |
| /* no error can occur in cid_parser_skip_spaces */ |
| if ( cur >= limit ) |
| break; |
| |
| cid_parser_skip_PS_token( parser ); |
| if ( parser->root.cursor >= limit || parser->root.error ) |
| break; |
| |
| /* look for immediates */ |
| if ( *cur == '/' && cur + 2 < limit ) |
| { |
| FT_UInt len; |
| |
| |
| cur++; |
| len = (FT_UInt)( parser->root.cursor - cur ); |
| |
| if ( len > 0 && len < 22 ) |
| { |
| /* now compare the immediate name to the keyword table */ |
| T1_Field keyword = (T1_Field)cid_field_records; |
| |
| |
| for (;;) |
| { |
| FT_Byte* name; |
| |
| |
| name = (FT_Byte*)keyword->ident; |
| if ( !name ) |
| break; |
| |
| if ( cur[0] == name[0] && |
| len == ft_strlen( (const char*)name ) ) |
| { |
| FT_UInt n; |
| |
| |
| for ( n = 1; n < len; n++ ) |
| if ( cur[n] != name[n] ) |
| break; |
| |
| if ( n >= len ) |
| { |
| /* we found it - run the parsing callback */ |
| parser->root.error = cid_load_keyword( face, |
| loader, |
| keyword ); |
| if ( parser->root.error ) |
| return parser->root.error; |
| break; |
| } |
| } |
| keyword++; |
| } |
| } |
| } |
| |
| cur = parser->root.cursor; |
| } |
| |
| if ( !face->cid.num_dicts ) |
| { |
| FT_ERROR(( "cid_parse_dict: No font dictionary found\n" )); |
| return FT_THROW( Invalid_File_Format ); |
| } |
| } |
| |
| return parser->root.error; |
| } |
| |
| |
| /* read the subrmap and the subrs of each font dict */ |
| static FT_Error |
| cid_read_subrs( CID_Face face ) |
| { |
| CID_FaceInfo cid = &face->cid; |
| FT_Memory memory = face->root.memory; |
| FT_Stream stream = face->cid_stream; |
| FT_Error error; |
| FT_UInt n; |
| CID_Subrs subr; |
| FT_UInt max_offsets = 0; |
| FT_ULong* offsets = NULL; |
| PSAux_Service psaux = (PSAux_Service)face->psaux; |
| |
| |
| if ( FT_NEW_ARRAY( face->subrs, cid->num_dicts ) ) |
| goto Exit; |
| |
| subr = face->subrs; |
| for ( n = 0; n < cid->num_dicts; n++, subr++ ) |
| { |
| CID_FaceDict dict = cid->font_dicts + n; |
| FT_Int lenIV = dict->private_dict.lenIV; |
| FT_UInt count, num_subrs = dict->num_subrs; |
| FT_ULong data_len; |
| FT_Byte* p; |
| |
| |
| if ( !num_subrs ) |
| continue; |
| |
| /* reallocate offsets array if needed */ |
| if ( num_subrs + 1 > max_offsets ) |
| { |
| FT_UInt new_max = FT_PAD_CEIL( num_subrs + 1, 4 ); |
| |
| |
| if ( new_max <= max_offsets ) |
| { |
| error = FT_THROW( Syntax_Error ); |
| goto Fail; |
| } |
| |
| if ( FT_QRENEW_ARRAY( offsets, max_offsets, new_max ) ) |
| goto Fail; |
| |
| max_offsets = new_max; |
| } |
| |
| /* read the subrmap's offsets */ |
| if ( FT_STREAM_SEEK( cid->data_offset + dict->subrmap_offset ) || |
| FT_FRAME_ENTER( ( num_subrs + 1 ) * dict->sd_bytes ) ) |
| goto Fail; |
| |
| p = (FT_Byte*)stream->cursor; |
| for ( count = 0; count <= num_subrs; count++ ) |
| offsets[count] = cid_get_offset( &p, dict->sd_bytes ); |
| |
| FT_FRAME_EXIT(); |
| |
| /* offsets must be ordered */ |
| for ( count = 1; count <= num_subrs; count++ ) |
| if ( offsets[count - 1] > offsets[count] ) |
| { |
| FT_ERROR(( "cid_read_subrs: offsets are not ordered\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Fail; |
| } |
| |
| if ( offsets[num_subrs] > stream->size - cid->data_offset ) |
| { |
| FT_ERROR(( "cid_read_subrs: too large `subrs' offsets\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Fail; |
| } |
| |
| /* now, compute the size of subrs charstrings, */ |
| /* allocate, and read them */ |
| data_len = offsets[num_subrs] - offsets[0]; |
| |
| if ( FT_QNEW_ARRAY( subr->code, num_subrs + 1 ) || |
| FT_QALLOC( subr->code[0], data_len ) ) |
| goto Fail; |
| |
| if ( FT_STREAM_SEEK( cid->data_offset + offsets[0] ) || |
| FT_STREAM_READ( subr->code[0], data_len ) ) |
| goto Fail; |
| |
| /* set up pointers */ |
| for ( count = 1; count <= num_subrs; count++ ) |
| { |
| FT_ULong len; |
| |
| |
| len = offsets[count] - offsets[count - 1]; |
| subr->code[count] = subr->code[count - 1] + len; |
| } |
| |
| /* decrypt subroutines, but only if lenIV >= 0 */ |
| if ( lenIV >= 0 ) |
| { |
| for ( count = 0; count < num_subrs; count++ ) |
| { |
| FT_ULong len; |
| |
| |
| len = offsets[count + 1] - offsets[count]; |
| psaux->t1_decrypt( subr->code[count], len, 4330 ); |
| } |
| } |
| |
| subr->num_subrs = (FT_Int)num_subrs; |
| } |
| |
| Exit: |
| FT_FREE( offsets ); |
| return error; |
| |
| Fail: |
| if ( face->subrs ) |
| { |
| for ( n = 0; n < cid->num_dicts; n++ ) |
| { |
| if ( face->subrs[n].code ) |
| FT_FREE( face->subrs[n].code[0] ); |
| |
| FT_FREE( face->subrs[n].code ); |
| } |
| FT_FREE( face->subrs ); |
| } |
| goto Exit; |
| } |
| |
| |
| static void |
| cid_init_loader( CID_Loader* loader, |
| CID_Face face ) |
| { |
| FT_UNUSED( face ); |
| |
| FT_ZERO( loader ); |
| } |
| |
| |
| static void |
| cid_done_loader( CID_Loader* loader ) |
| { |
| CID_Parser* parser = &loader->parser; |
| |
| |
| /* finalize parser */ |
| cid_parser_done( parser ); |
| } |
| |
| |
| static FT_Error |
| cid_hex_to_binary( FT_Byte* data, |
| FT_ULong data_len, |
| FT_ULong offset, |
| CID_Face face, |
| FT_ULong* data_written ) |
| { |
| FT_Stream stream = face->root.stream; |
| FT_Error error; |
| |
| FT_Byte buffer[256]; |
| FT_Byte *p, *plimit; |
| FT_Byte *d = data, *dlimit; |
| FT_Byte val; |
| |
| FT_Bool upper_nibble, done; |
| |
| |
| if ( FT_STREAM_SEEK( offset ) ) |
| goto Exit; |
| |
| dlimit = d + data_len; |
| p = buffer; |
| plimit = p; |
| |
| upper_nibble = 1; |
| done = 0; |
| |
| while ( d < dlimit ) |
| { |
| if ( p >= plimit ) |
| { |
| FT_ULong oldpos = FT_STREAM_POS(); |
| FT_ULong size = stream->size - oldpos; |
| |
| |
| if ( size == 0 ) |
| { |
| error = FT_THROW( Syntax_Error ); |
| goto Exit; |
| } |
| |
| if ( FT_STREAM_READ( buffer, 256 > size ? size : 256 ) ) |
| goto Exit; |
| p = buffer; |
| plimit = p + FT_STREAM_POS() - oldpos; |
| } |
| |
| if ( ft_isdigit( *p ) ) |
| val = (FT_Byte)( *p - '0' ); |
| else if ( *p >= 'a' && *p <= 'f' ) |
| val = (FT_Byte)( *p - 'a' + 10 ); |
| else if ( *p >= 'A' && *p <= 'F' ) |
| val = (FT_Byte)( *p - 'A' + 10 ); |
| else if ( *p == ' ' || |
| *p == '\t' || |
| *p == '\r' || |
| *p == '\n' || |
| *p == '\f' || |
| *p == '\0' ) |
| { |
| p++; |
| continue; |
| } |
| else if ( *p == '>' ) |
| { |
| val = 0; |
| done = 1; |
| } |
| else |
| { |
| error = FT_THROW( Syntax_Error ); |
| goto Exit; |
| } |
| |
| if ( upper_nibble ) |
| *d = (FT_Byte)( val << 4 ); |
| else |
| { |
| *d = (FT_Byte)( *d + val ); |
| d++; |
| } |
| |
| upper_nibble = (FT_Byte)( 1 - upper_nibble ); |
| |
| if ( done ) |
| break; |
| |
| p++; |
| } |
| |
| error = FT_Err_Ok; |
| |
| Exit: |
| *data_written = (FT_ULong)( d - data ); |
| return error; |
| } |
| |
| |
| FT_LOCAL_DEF( FT_Error ) |
| cid_face_open( CID_Face face, |
| FT_Int face_index ) |
| { |
| CID_Loader loader; |
| CID_Parser* parser; |
| FT_Memory memory = face->root.memory; |
| FT_Error error; |
| FT_UInt n; |
| |
| CID_FaceInfo cid = &face->cid; |
| |
| FT_ULong binary_length; |
| |
| |
| cid_init_loader( &loader, face ); |
| |
| parser = &loader.parser; |
| error = cid_parser_new( parser, face->root.stream, face->root.memory, |
| (PSAux_Service)face->psaux ); |
| if ( error ) |
| goto Exit; |
| |
| error = cid_parse_dict( face, &loader, |
| parser->postscript, |
| parser->postscript_len ); |
| if ( error ) |
| goto Exit; |
| |
| if ( face_index < 0 ) |
| goto Exit; |
| |
| if ( FT_NEW( face->cid_stream ) ) |
| goto Exit; |
| |
| if ( parser->binary_length ) |
| { |
| if ( parser->binary_length > |
| face->root.stream->size - parser->data_offset ) |
| { |
| FT_TRACE0(( "cid_face_open: adjusting length of binary data\n" )); |
| FT_TRACE0(( " (from %lu to %lu bytes)\n", |
| parser->binary_length, |
| face->root.stream->size - parser->data_offset )); |
| parser->binary_length = face->root.stream->size - |
| parser->data_offset; |
| } |
| |
| /* we must convert the data section from hexadecimal to binary */ |
| if ( FT_QALLOC( face->binary_data, parser->binary_length ) || |
| FT_SET_ERROR( cid_hex_to_binary( face->binary_data, |
| parser->binary_length, |
| parser->data_offset, |
| face, |
| &binary_length ) ) ) |
| goto Exit; |
| |
| FT_Stream_OpenMemory( face->cid_stream, |
| face->binary_data, binary_length ); |
| cid->data_offset = 0; |
| } |
| else |
| { |
| *face->cid_stream = *face->root.stream; |
| cid->data_offset = loader.parser.data_offset; |
| } |
| |
| /* sanity tests */ |
| |
| if ( cid->gd_bytes == 0 ) |
| { |
| FT_ERROR(( "cid_face_open:" |
| " Invalid `GDBytes' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| /* allow at most 32bit offsets */ |
| if ( cid->fd_bytes > 4 || cid->gd_bytes > 4 ) |
| { |
| FT_ERROR(( "cid_face_open:" |
| " Values of `FDBytes' or `GDBytes' larger than 4\n" )); |
| FT_ERROR(( " " |
| " are not supported\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| binary_length = face->cid_stream->size - cid->data_offset; |
| |
| if ( cid->cidmap_offset > binary_length ) |
| { |
| FT_ERROR(( "cid_face_open: Invalid `CIDMapOffset' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| /* the initial pre-check prevents the multiplication overflow */ |
| if ( cid->cid_count > FT_ULONG_MAX / 8 || |
| cid->cid_count * ( cid->fd_bytes + cid->gd_bytes ) > |
| binary_length - cid->cidmap_offset ) |
| { |
| FT_ERROR(( "cid_face_open: Invalid `CIDCount' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| |
| for ( n = 0; n < cid->num_dicts; n++ ) |
| { |
| CID_FaceDict dict = cid->font_dicts + n; |
| |
| |
| /* the upper limits are ad-hoc values */ |
| if ( dict->private_dict.blue_shift > 1000 || |
| dict->private_dict.blue_shift < 0 ) |
| { |
| FT_TRACE2(( "cid_face_open:" |
| " setting unlikely BlueShift value %d to default (7)\n", |
| dict->private_dict.blue_shift )); |
| dict->private_dict.blue_shift = 7; |
| } |
| |
| if ( dict->private_dict.blue_fuzz > 1000 || |
| dict->private_dict.blue_fuzz < 0 ) |
| { |
| FT_TRACE2(( "cid_face_open:" |
| " setting unlikely BlueFuzz value %d to default (1)\n", |
| dict->private_dict.blue_fuzz )); |
| dict->private_dict.blue_fuzz = 1; |
| } |
| |
| if ( dict->num_subrs && dict->sd_bytes == 0 ) |
| { |
| FT_ERROR(( "cid_face_open: Invalid `SDBytes' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| if ( dict->sd_bytes > 4 ) |
| { |
| FT_ERROR(( "cid_face_open:" |
| " Values of `SDBytes' larger than 4" |
| " are not supported\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| if ( dict->subrmap_offset > binary_length ) |
| { |
| FT_ERROR(( "cid_face_open: Invalid `SubrMapOffset' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| |
| /* the initial pre-check prevents the multiplication overflow */ |
| if ( dict->num_subrs > FT_UINT_MAX / 4 || |
| dict->num_subrs * dict->sd_bytes > |
| binary_length - dict->subrmap_offset ) |
| { |
| FT_ERROR(( "cid_face_open: Invalid `SubrCount' value\n" )); |
| error = FT_THROW( Invalid_File_Format ); |
| goto Exit; |
| } |
| } |
| |
| /* we can now safely proceed */ |
| error = cid_read_subrs( face ); |
| |
| Exit: |
| cid_done_loader( &loader ); |
| return error; |
| } |
| |
| |
| /* END */ |
