/***************************************************************************//* *//* cidload.c *//* *//* CID-keyed Type1 font loader (body). *//* *//* Copyright 1996-2001, 2002 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_CONFIG_CONFIG_H#include FT_MULTIPLE_MASTERS_H#include FT_INTERNAL_TYPE1_TYPES_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 trace_cidload /* read a single offset */ FT_LOCAL_DEF( FT_Long ) cid_get_offset( FT_Byte** start, FT_Byte offsize ) { FT_Long result; FT_Byte* p = *start; for ( result = 0; offsize > 0; offsize-- ) { result <<= 8; result |= *p++; } *start = p; return result; } FT_LOCAL_DEF( void ) cid_decrypt( FT_Byte* buffer, FT_Offset length, FT_UShort seed ) { while ( length > 0 ) { FT_Byte plain; plain = (FT_Byte)( *buffer ^ ( seed >> 8 ) ); seed = (FT_UShort)( ( *buffer + seed ) * 52845U + 22719 ); *buffer++ = plain; length--; } } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** 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 ) { 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; default: { CID_FaceDict dict; if ( parser->num_dict < 0 ) { FT_ERROR(( "cid_load_keyword: invalid use of `%s'!\n", keyword->ident )); error = CID_Err_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; } } } 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 ); Exit: return error; } FT_CALLBACK_DEF( FT_Error ) parse_font_bbox( CID_Face face, CID_Parser* parser ) { FT_Fixed temp[4]; FT_BBox* bbox = &face->cid.font_bbox; (void)cid_parser_to_fixed_array( parser, 4, temp, 0 ); bbox->xMin = FT_RoundFix( temp[0] ); bbox->yMin = FT_RoundFix( temp[1] ); bbox->xMax = FT_RoundFix( temp[2] ); bbox->yMax = FT_RoundFix( temp[3] ); return CID_Err_Ok; /* this is a callback function; */ /* we must return an error code */ } FT_CALLBACK_DEF( FT_Error ) parse_font_matrix( CID_Face face, CID_Parser* parser ) { FT_Matrix* matrix; FT_Vector* offset; CID_FaceDict dict; FT_Face root = (FT_Face)&face->root; FT_Fixed temp[6]; FT_Fixed temp_scale; if ( parser->num_dict >= 0 ) { dict = face->cid.font_dicts + parser->num_dict; matrix = &dict->font_matrix; offset = &dict->font_offset; (void)cid_parser_to_fixed_array( parser, 6, temp, 3 ); temp_scale = ABS( temp[3] ); /* Set Units per EM based on FontMatrix values. We set the value to */ /* `1000/temp_scale', because temp_scale was already multiplied by */ /* 1000 (in t1_tofixed(), from psobjs.c). */ root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L, FT_DivFix( temp_scale, 1000 ) ) ); /* we need to scale the values by 1.0/temp[3] */ if ( temp_scale != 0x10000L ) { 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] = 0x10000L; } matrix->xx = temp[0]; matrix->yx = temp[1]; matrix->xy = temp[2]; matrix->yy = temp[3]; /* note that the font offsets are expressed in integer font units */ offset->x = temp[4] >> 16; offset->y = temp[5] >> 16; } return CID_Err_Ok; /* this is a callback function; */ /* we must return an error code */ } FT_CALLBACK_DEF( FT_Error ) parse_fd_array( CID_Face face, CID_Parser* parser ) { CID_FaceInfo cid = &face->cid; FT_Memory memory = face->root.memory; FT_Error error = CID_Err_Ok; FT_Long num_dicts; num_dicts = cid_parser_to_int( parser ); if ( !cid->font_dicts ) { FT_Int n; if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) ) goto Exit; cid->num_dicts = (FT_UInt)num_dicts; /* don't forget to set a few defaults */ for ( n = 0; n < cid->num_dicts; n++ ) { CID_FaceDict dict = cid->font_dicts + n; /* default value for lenIV */ dict->private_dict.lenIV = 4; } } Exit: return error; } static const T1_FieldRec cid_field_records[] = { #include "cidtoken.h" T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox ) T1_FIELD_CALLBACK( "FDArray", parse_fd_array ) T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix ) { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0 } }; static int is_alpha( char c ) { return ( ft_isalnum( (int)c ) || c == '.' || c == '_' ); } static FT_Error cid_parse_dict( CID_Face face, CID_Loader* loader, FT_Byte* base, FT_Long size ) { CID_Parser* parser = &loader->parser; parser->root.cursor = base; parser->root.limit = base + size; parser->root.error = 0; { FT_Byte* cur = base; FT_Byte* limit = cur + size; for ( ;cur < limit; cur++ ) { /* look for `%ADOBeginFontDict' */ if ( *cur == '%' && cur + 20 < limit && ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 ) { cur += 17; /* 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++; } /* look for immediates */ else if ( *cur == '/' && cur + 2 < limit ) { FT_Byte* cur2; FT_Int len; cur++; cur2 = cur; while ( cur2 < limit && is_alpha( *cur2 ) ) cur2++; len = (FT_Int)( cur2 - 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_Int)ft_strlen( (const char*)name ) ) { FT_Int 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.cursor = cur2; cid_parser_skip_spaces( parser ); parser->root.error = cid_load_keyword( face, loader, keyword ); if ( parser->root.error ) return parser->root.error; cur = parser->root.cursor; break; } } keyword++; } } } } } 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->root.stream; FT_Error error; FT_Int n; CID_Subrs subr; FT_UInt max_offsets = 0; FT_ULong* offsets = 0; 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; /* reallocate offsets array if needed */ if ( num_subrs + 1 > max_offsets ) { FT_UInt new_max = ( num_subrs + 1 + 3 ) & -4; if ( FT_RENEW_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, (FT_Byte)dict->sd_bytes ); FT_FRAME_EXIT(); /* now, compute the size of subrs charstrings, */ /* allocate, and read them */ data_len = offsets[num_subrs] - offsets[0]; if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) || FT_ALLOC( 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]; cid_decrypt( subr->code[count], len, 4330 ); } } subr->num_subrs = 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 t1_init_loader( CID_Loader* loader, CID_Face face ) { FT_UNUSED( face ); FT_MEM_ZERO( loader, sizeof ( *loader ) );Lines 1–500 of 546. 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/***************************************************************************/ /* */ /* cidload.c */ /* */ /* CID-keyed Type1 font loader (body). */ /* */ /* Copyright 1996-2001, 2002 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_CONFIG_CONFIG_H #include FT_MULTIPLE_MASTERS_H #include FT_INTERNAL_TYPE1_TYPES_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 trace_cidload /* read a single offset */ FT_LOCAL_DEF( FT_Long ) cid_get_offset( FT_Byte** start, FT_Byte offsize ) { FT_Long result; FT_Byte* p = *start; for ( result = 0; offsize > 0; offsize-- ) { result <<= 8; result |= *p++; } *start = p; return result; } FT_LOCAL_DEF( void ) cid_decrypt( FT_Byte* buffer, FT_Offset length, FT_UShort seed ) { while ( length > 0 ) { FT_Byte plain; plain = (FT_Byte)( *buffer ^ ( seed >> 8 ) ); seed = (FT_UShort)( ( *buffer + seed ) * 52845U + 22719 ); *buffer++ = plain; length--; } } /*************************************************************************/ /*************************************************************************/ /***** *****/ /***** 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 ) { 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; default: { CID_FaceDict dict; if ( parser->num_dict < 0 ) { FT_ERROR(( "cid_load_keyword: invalid use of `%s'!\n", keyword->ident )); error = CID_Err_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; } } } 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 ); Exit: return error; } FT_CALLBACK_DEF( FT_Error ) parse_font_bbox( CID_Face face, CID_Parser* parser ) { FT_Fixed temp[4]; FT_BBox* bbox = &face->cid.font_bbox; (void)cid_parser_to_fixed_array( parser, 4, temp, 0 ); bbox->xMin = FT_RoundFix( temp[0] ); bbox->yMin = FT_RoundFix( temp[1] ); bbox->xMax = FT_RoundFix( temp[2] ); bbox->yMax = FT_RoundFix( temp[3] ); return CID_Err_Ok; /* this is a callback function; */ /* we must return an error code */ } FT_CALLBACK_DEF( FT_Error ) parse_font_matrix( CID_Face face, CID_Parser* parser ) { FT_Matrix* matrix; FT_Vector* offset; CID_FaceDict dict; FT_Face root = (FT_Face)&face->root; FT_Fixed temp[6]; FT_Fixed temp_scale; if ( parser->num_dict >= 0 ) { dict = face->cid.font_dicts + parser->num_dict; matrix = &dict->font_matrix; offset = &dict->font_offset; (void)cid_parser_to_fixed_array( parser, 6, temp, 3 ); temp_scale = ABS( temp[3] ); /* Set Units per EM based on FontMatrix values. We set the value to */ /* `1000/temp_scale', because temp_scale was already multiplied by */ /* 1000 (in t1_tofixed(), from psobjs.c). */ root->units_per_EM = (FT_UShort)( FT_DivFix( 0x10000L, FT_DivFix( temp_scale, 1000 ) ) ); /* we need to scale the values by 1.0/temp[3] */ if ( temp_scale != 0x10000L ) { 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] = 0x10000L; } matrix->xx = temp[0]; matrix->yx = temp[1]; matrix->xy = temp[2]; matrix->yy = temp[3]; /* note that the font offsets are expressed in integer font units */ offset->x = temp[4] >> 16; offset->y = temp[5] >> 16; } return CID_Err_Ok; /* this is a callback function; */ /* we must return an error code */ } FT_CALLBACK_DEF( FT_Error ) parse_fd_array( CID_Face face, CID_Parser* parser ) { CID_FaceInfo cid = &face->cid; FT_Memory memory = face->root.memory; FT_Error error = CID_Err_Ok; FT_Long num_dicts; num_dicts = cid_parser_to_int( parser ); if ( !cid->font_dicts ) { FT_Int n; if ( FT_NEW_ARRAY( cid->font_dicts, num_dicts ) ) goto Exit; cid->num_dicts = (FT_UInt)num_dicts; /* don't forget to set a few defaults */ for ( n = 0; n < cid->num_dicts; n++ ) { CID_FaceDict dict = cid->font_dicts + n; /* default value for lenIV */ dict->private_dict.lenIV = 4; } } Exit: return error; } static const T1_FieldRec cid_field_records[] = { #include "cidtoken.h" T1_FIELD_CALLBACK( "FontBBox", parse_font_bbox ) T1_FIELD_CALLBACK( "FDArray", parse_fd_array ) T1_FIELD_CALLBACK( "FontMatrix", parse_font_matrix ) { 0, T1_FIELD_LOCATION_CID_INFO, T1_FIELD_TYPE_NONE, 0, 0, 0, 0, 0 } }; static int is_alpha( char c ) { return ( ft_isalnum( (int)c ) || c == '.' || c == '_' ); } static FT_Error cid_parse_dict( CID_Face face, CID_Loader* loader, FT_Byte* base, FT_Long size ) { CID_Parser* parser = &loader->parser; parser->root.cursor = base; parser->root.limit = base + size; parser->root.error = 0; { FT_Byte* cur = base; FT_Byte* limit = cur + size; for ( ;cur < limit; cur++ ) { /* look for `%ADOBeginFontDict' */ if ( *cur == '%' && cur + 20 < limit && ft_strncmp( (char*)cur, "%ADOBeginFontDict", 17 ) == 0 ) { cur += 17; /* 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++; } /* look for immediates */ else if ( *cur == '/' && cur + 2 < limit ) { FT_Byte* cur2; FT_Int len; cur++; cur2 = cur; while ( cur2 < limit && is_alpha( *cur2 ) ) cur2++; len = (FT_Int)( cur2 - 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_Int)ft_strlen( (const char*)name ) ) { FT_Int 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.cursor = cur2; cid_parser_skip_spaces( parser ); parser->root.error = cid_load_keyword( face, loader, keyword ); if ( parser->root.error ) return parser->root.error; cur = parser->root.cursor; break; } } keyword++; } } } } } 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->root.stream; FT_Error error; FT_Int n; CID_Subrs subr; FT_UInt max_offsets = 0; FT_ULong* offsets = 0; 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; /* reallocate offsets array if needed */ if ( num_subrs + 1 > max_offsets ) { FT_UInt new_max = ( num_subrs + 1 + 3 ) & -4; if ( FT_RENEW_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, (FT_Byte)dict->sd_bytes ); FT_FRAME_EXIT(); /* now, compute the size of subrs charstrings, */ /* allocate, and read them */ data_len = offsets[num_subrs] - offsets[0]; if ( FT_NEW_ARRAY( subr->code, num_subrs + 1 ) || FT_ALLOC( 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]; cid_decrypt( subr->code[count], len, 4330 ); } } subr->num_subrs = 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 t1_init_loader( CID_Loader* loader, CID_Face face ) { FT_UNUSED( face ); FT_MEM_ZERO( loader, sizeof ( *loader ) );