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Diffstat (limited to 'libfreetype/cidload.c')
| -rw-r--r-- | libfreetype/cidload.c | 546 |
1 files changed, 0 insertions, 546 deletions
diff --git a/libfreetype/cidload.c b/libfreetype/cidload.c deleted file mode 100644 index 19cfab50..00000000 --- a/libfreetype/cidload.c +++ /dev/null @@ -1,546 +0,0 @@ -/***************************************************************************/ -/* */ -/* 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 ) ); - } - - - static void - t1_done_loader( CID_Loader* loader ) - { - CID_Parser* parser = &loader->parser; - - - /* finalize parser */ - cid_parser_done( parser ); - } - - - FT_LOCAL_DEF( FT_Error ) - cid_face_open( CID_Face face ) - { - CID_Loader loader; - CID_Parser* parser; - FT_Error error; - - - t1_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; - - face->cid.data_offset = loader.parser.data_offset; - error = cid_read_subrs( face ); - - Exit: - t1_done_loader( &loader ); - return error; - } - - -/* END */ |