690 lines
19 KiB
C
690 lines
19 KiB
C
/****************************************************************************
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*
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* t42objs.c
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*
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* Type 42 objects manager (body).
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*
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* Copyright (C) 2002-2020 by
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* Roberto Alameda.
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*
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* This file is part of the FreeType project, and may only be used,
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* modified, and distributed under the terms of the FreeType project
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* license, LICENSE.TXT. By continuing to use, modify, or distribute
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* this file you indicate that you have read the license and
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* understand and accept it fully.
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*
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*/
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#include "t42objs.h"
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#include "t42parse.h"
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#include "t42error.h"
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#include FT_INTERNAL_DEBUG_H
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#include FT_LIST_H
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#include FT_TRUETYPE_IDS_H
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#undef FT_COMPONENT
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#define FT_COMPONENT t42
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static FT_Error
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T42_Open_Face( T42_Face face )
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{
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T42_LoaderRec loader;
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T42_Parser parser;
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T1_Font type1 = &face->type1;
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FT_Memory memory = face->root.memory;
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FT_Error error;
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PSAux_Service psaux = (PSAux_Service)face->psaux;
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t42_loader_init( &loader, face );
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parser = &loader.parser;
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if ( FT_ALLOC( face->ttf_data, 12 ) )
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goto Exit;
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/* while parsing the font we always update `face->ttf_size' so that */
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/* even in case of buggy data (which might lead to premature end of */
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/* scanning without causing an error) the call to `FT_Open_Face' in */
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/* `T42_Face_Init' passes the correct size */
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face->ttf_size = 12;
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error = t42_parser_init( parser,
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face->root.stream,
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memory,
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psaux);
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if ( error )
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goto Exit;
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error = t42_parse_dict( face, &loader,
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parser->base_dict, parser->base_len );
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if ( error )
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goto Exit;
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if ( type1->font_type != 42 )
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{
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FT_ERROR(( "T42_Open_Face: cannot handle FontType %d\n",
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type1->font_type ));
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error = FT_THROW( Unknown_File_Format );
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goto Exit;
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}
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/* now, propagate the charstrings and glyphnames tables */
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/* to the Type1 data */
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type1->num_glyphs = loader.num_glyphs;
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if ( !loader.charstrings.init )
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{
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FT_ERROR(( "T42_Open_Face: no charstrings array in face\n" ));
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error = FT_THROW( Invalid_File_Format );
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}
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loader.charstrings.init = 0;
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type1->charstrings_block = loader.charstrings.block;
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type1->charstrings = loader.charstrings.elements;
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type1->charstrings_len = loader.charstrings.lengths;
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/* we copy the glyph names `block' and `elements' fields; */
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/* the `lengths' field must be released later */
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type1->glyph_names_block = loader.glyph_names.block;
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type1->glyph_names = (FT_String**)loader.glyph_names.elements;
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loader.glyph_names.block = NULL;
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loader.glyph_names.elements = NULL;
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/* we must now build type1.encoding when we have a custom array */
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if ( type1->encoding_type == T1_ENCODING_TYPE_ARRAY )
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{
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FT_Int charcode, idx, min_char, max_char;
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/* OK, we do the following: for each element in the encoding */
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/* table, look up the index of the glyph having the same name */
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/* as defined in the CharStrings array. */
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/* The index is then stored in type1.encoding.char_index, and */
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/* the name in type1.encoding.char_name */
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min_char = 0;
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max_char = 0;
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charcode = 0;
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for ( ; charcode < loader.encoding_table.max_elems; charcode++ )
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{
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const FT_String* char_name =
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(const FT_String*)loader.encoding_table.elements[charcode];
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type1->encoding.char_index[charcode] = 0;
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type1->encoding.char_name [charcode] = ".notdef";
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if ( char_name )
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for ( idx = 0; idx < type1->num_glyphs; idx++ )
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{
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const FT_String* glyph_name = type1->glyph_names[idx];
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if ( ft_strcmp( char_name, glyph_name ) == 0 )
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{
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type1->encoding.char_index[charcode] = (FT_UShort)idx;
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type1->encoding.char_name [charcode] = glyph_name;
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/* Change min/max encoded char only if glyph name is */
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/* not /.notdef */
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if ( ft_strcmp( ".notdef", glyph_name ) != 0 )
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{
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if ( charcode < min_char )
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min_char = charcode;
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if ( charcode >= max_char )
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max_char = charcode + 1;
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}
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break;
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}
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}
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}
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type1->encoding.code_first = min_char;
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type1->encoding.code_last = max_char;
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type1->encoding.num_chars = loader.num_chars;
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}
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Exit:
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t42_loader_done( &loader );
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return error;
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}
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/***************** Driver Functions *************/
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FT_LOCAL_DEF( FT_Error )
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T42_Face_Init( FT_Stream stream,
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FT_Face t42face, /* T42_Face */
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FT_Int face_index,
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FT_Int num_params,
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FT_Parameter* params )
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{
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T42_Face face = (T42_Face)t42face;
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FT_Error error;
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FT_Service_PsCMaps psnames;
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PSAux_Service psaux;
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FT_Face root = (FT_Face)&face->root;
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T1_Font type1 = &face->type1;
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PS_FontInfo info = &type1->font_info;
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FT_UNUSED( num_params );
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FT_UNUSED( params );
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FT_UNUSED( stream );
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face->ttf_face = NULL;
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face->root.num_faces = 1;
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FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS );
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face->psnames = psnames;
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face->psaux = FT_Get_Module_Interface( FT_FACE_LIBRARY( face ),
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"psaux" );
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psaux = (PSAux_Service)face->psaux;
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if ( !psaux )
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{
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FT_ERROR(( "T42_Face_Init: cannot access `psaux' module\n" ));
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error = FT_THROW( Missing_Module );
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goto Exit;
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}
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FT_TRACE2(( "Type 42 driver\n" ));
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/* open the tokenizer, this will also check the font format */
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error = T42_Open_Face( face );
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if ( error )
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goto Exit;
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/* if we just wanted to check the format, leave successfully now */
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if ( face_index < 0 )
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goto Exit;
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/* check the face index */
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if ( ( face_index & 0xFFFF ) > 0 )
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{
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FT_ERROR(( "T42_Face_Init: invalid face index\n" ));
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error = FT_THROW( Invalid_Argument );
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goto Exit;
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}
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/* Now load the font program into the face object */
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/* Init the face object fields */
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/* Now set up root face fields */
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root->num_glyphs = type1->num_glyphs;
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root->num_charmaps = 0;
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root->face_index = 0;
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root->face_flags |= FT_FACE_FLAG_SCALABLE |
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FT_FACE_FLAG_HORIZONTAL |
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FT_FACE_FLAG_GLYPH_NAMES;
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if ( info->is_fixed_pitch )
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root->face_flags |= FT_FACE_FLAG_FIXED_WIDTH;
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#ifdef TT_CONFIG_OPTION_BYTECODE_INTERPRETER
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root->face_flags |= FT_FACE_FLAG_HINTER;
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#endif
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/* XXX: TODO -- add kerning with .afm support */
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/* get style name -- be careful, some broken fonts only */
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/* have a `/FontName' dictionary entry! */
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root->family_name = info->family_name;
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/* assume "Regular" style if we don't know better */
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root->style_name = (char *)"Regular";
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if ( root->family_name )
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{
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char* full = info->full_name;
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char* family = root->family_name;
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if ( full )
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{
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while ( *full )
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{
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if ( *full == *family )
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{
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family++;
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full++;
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}
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else
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{
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if ( *full == ' ' || *full == '-' )
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full++;
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else if ( *family == ' ' || *family == '-' )
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family++;
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else
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{
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if ( !*family )
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root->style_name = full;
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break;
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}
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}
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}
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}
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}
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else
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{
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/* do we have a `/FontName'? */
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if ( type1->font_name )
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root->family_name = type1->font_name;
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}
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/* no embedded bitmap support */
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root->num_fixed_sizes = 0;
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root->available_sizes = NULL;
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/* Load the TTF font embedded in the T42 font */
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{
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FT_Open_Args args;
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args.flags = FT_OPEN_MEMORY | FT_OPEN_DRIVER;
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args.driver = FT_Get_Module( FT_FACE_LIBRARY( face ),
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"truetype" );
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args.memory_base = face->ttf_data;
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args.memory_size = face->ttf_size;
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if ( num_params )
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{
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args.flags |= FT_OPEN_PARAMS;
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args.num_params = num_params;
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args.params = params;
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}
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error = FT_Open_Face( FT_FACE_LIBRARY( face ),
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&args, 0, &face->ttf_face );
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}
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if ( error )
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goto Exit;
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FT_Done_Size( face->ttf_face->size );
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/* Ignore info in FontInfo dictionary and use the info from the */
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/* loaded TTF font. The PostScript interpreter also ignores it. */
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root->bbox = face->ttf_face->bbox;
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root->units_per_EM = face->ttf_face->units_per_EM;
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root->ascender = face->ttf_face->ascender;
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root->descender = face->ttf_face->descender;
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root->height = face->ttf_face->height;
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root->max_advance_width = face->ttf_face->max_advance_width;
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root->max_advance_height = face->ttf_face->max_advance_height;
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root->underline_position = (FT_Short)info->underline_position;
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root->underline_thickness = (FT_Short)info->underline_thickness;
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/* compute style flags */
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root->style_flags = 0;
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if ( info->italic_angle )
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root->style_flags |= FT_STYLE_FLAG_ITALIC;
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if ( face->ttf_face->style_flags & FT_STYLE_FLAG_BOLD )
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root->style_flags |= FT_STYLE_FLAG_BOLD;
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if ( face->ttf_face->face_flags & FT_FACE_FLAG_VERTICAL )
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root->face_flags |= FT_FACE_FLAG_VERTICAL;
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{
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if ( psnames )
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{
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FT_CharMapRec charmap;
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T1_CMap_Classes cmap_classes = psaux->t1_cmap_classes;
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FT_CMap_Class clazz;
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charmap.face = root;
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/* first of all, try to synthesize a Unicode charmap */
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charmap.platform_id = TT_PLATFORM_MICROSOFT;
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charmap.encoding_id = TT_MS_ID_UNICODE_CS;
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charmap.encoding = FT_ENCODING_UNICODE;
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error = FT_CMap_New( cmap_classes->unicode, NULL, &charmap, NULL );
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if ( error &&
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FT_ERR_NEQ( error, No_Unicode_Glyph_Name ) &&
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FT_ERR_NEQ( error, Unimplemented_Feature ) )
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goto Exit;
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error = FT_Err_Ok;
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/* now, generate an Adobe Standard encoding when appropriate */
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charmap.platform_id = TT_PLATFORM_ADOBE;
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clazz = NULL;
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switch ( type1->encoding_type )
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{
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case T1_ENCODING_TYPE_STANDARD:
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charmap.encoding = FT_ENCODING_ADOBE_STANDARD;
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charmap.encoding_id = TT_ADOBE_ID_STANDARD;
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clazz = cmap_classes->standard;
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break;
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case T1_ENCODING_TYPE_EXPERT:
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charmap.encoding = FT_ENCODING_ADOBE_EXPERT;
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charmap.encoding_id = TT_ADOBE_ID_EXPERT;
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clazz = cmap_classes->expert;
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break;
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case T1_ENCODING_TYPE_ARRAY:
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charmap.encoding = FT_ENCODING_ADOBE_CUSTOM;
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charmap.encoding_id = TT_ADOBE_ID_CUSTOM;
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clazz = cmap_classes->custom;
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break;
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case T1_ENCODING_TYPE_ISOLATIN1:
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charmap.encoding = FT_ENCODING_ADOBE_LATIN_1;
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charmap.encoding_id = TT_ADOBE_ID_LATIN_1;
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clazz = cmap_classes->unicode;
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break;
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default:
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;
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}
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if ( clazz )
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error = FT_CMap_New( clazz, NULL, &charmap, NULL );
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}
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}
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Exit:
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return error;
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}
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FT_LOCAL_DEF( void )
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T42_Face_Done( FT_Face t42face )
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{
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T42_Face face = (T42_Face)t42face;
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T1_Font type1;
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PS_FontInfo info;
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FT_Memory memory;
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if ( !face )
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return;
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type1 = &face->type1;
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info = &type1->font_info;
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memory = face->root.memory;
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/* delete internal ttf face prior to freeing face->ttf_data */
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if ( face->ttf_face )
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FT_Done_Face( face->ttf_face );
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/* release font info strings */
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FT_FREE( info->version );
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FT_FREE( info->notice );
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FT_FREE( info->full_name );
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FT_FREE( info->family_name );
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FT_FREE( info->weight );
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/* release top dictionary */
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FT_FREE( type1->charstrings_len );
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FT_FREE( type1->charstrings );
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FT_FREE( type1->glyph_names );
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FT_FREE( type1->charstrings_block );
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FT_FREE( type1->glyph_names_block );
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FT_FREE( type1->encoding.char_index );
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FT_FREE( type1->encoding.char_name );
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FT_FREE( type1->font_name );
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FT_FREE( face->ttf_data );
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#if 0
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/* release afm data if present */
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if ( face->afm_data )
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T1_Done_AFM( memory, (T1_AFM*)face->afm_data );
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#endif
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/* release unicode map, if any */
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FT_FREE( face->unicode_map.maps );
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face->unicode_map.num_maps = 0;
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face->root.family_name = NULL;
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face->root.style_name = NULL;
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}
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/**************************************************************************
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*
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* @Function:
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* T42_Driver_Init
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*
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* @Description:
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* Initializes a given Type 42 driver object.
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*
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* @Input:
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* driver ::
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* A handle to the target driver object.
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*
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* @Return:
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* FreeType error code. 0 means success.
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*/
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FT_LOCAL_DEF( FT_Error )
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T42_Driver_Init( FT_Module module ) /* T42_Driver */
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{
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T42_Driver driver = (T42_Driver)module;
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FT_Module ttmodule;
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ttmodule = FT_Get_Module( module->library, "truetype" );
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if ( !ttmodule )
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{
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FT_ERROR(( "T42_Driver_Init: cannot access `truetype' module\n" ));
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return FT_THROW( Missing_Module );
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}
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driver->ttclazz = (FT_Driver_Class)ttmodule->clazz;
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return FT_Err_Ok;
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}
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FT_LOCAL_DEF( void )
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T42_Driver_Done( FT_Module module )
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{
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FT_UNUSED( module );
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}
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FT_LOCAL_DEF( FT_Error )
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T42_Size_Init( FT_Size size ) /* T42_Size */
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{
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T42_Size t42size = (T42_Size)size;
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FT_Face face = size->face;
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T42_Face t42face = (T42_Face)face;
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FT_Size ttsize;
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FT_Error error;
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error = FT_New_Size( t42face->ttf_face, &ttsize );
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t42size->ttsize = ttsize;
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FT_Activate_Size( ttsize );
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return error;
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}
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FT_LOCAL_DEF( FT_Error )
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T42_Size_Request( FT_Size t42size, /* T42_Size */
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FT_Size_Request req )
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{
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T42_Size size = (T42_Size)t42size;
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T42_Face face = (T42_Face)t42size->face;
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FT_Error error;
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FT_Activate_Size( size->ttsize );
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error = FT_Request_Size( face->ttf_face, req );
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if ( !error )
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t42size->metrics = face->ttf_face->size->metrics;
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return error;
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}
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FT_LOCAL_DEF( FT_Error )
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T42_Size_Select( FT_Size t42size, /* T42_Size */
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FT_ULong strike_index )
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{
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T42_Size size = (T42_Size)t42size;
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T42_Face face = (T42_Face)t42size->face;
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FT_Error error;
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FT_Activate_Size( size->ttsize );
|
|
|
|
error = FT_Select_Size( face->ttf_face, (FT_Int)strike_index );
|
|
if ( !error )
|
|
t42size->metrics = face->ttf_face->size->metrics;
|
|
|
|
return error;
|
|
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( void )
|
|
T42_Size_Done( FT_Size t42size ) /* T42_Size */
|
|
{
|
|
T42_Size size = (T42_Size)t42size;
|
|
FT_Face face = t42size->face;
|
|
T42_Face t42face = (T42_Face)face;
|
|
FT_ListNode node;
|
|
|
|
|
|
node = FT_List_Find( &t42face->ttf_face->sizes_list, size->ttsize );
|
|
if ( node )
|
|
{
|
|
FT_Done_Size( size->ttsize );
|
|
size->ttsize = NULL;
|
|
}
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
T42_GlyphSlot_Init( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */
|
|
{
|
|
T42_GlyphSlot slot = (T42_GlyphSlot)t42slot;
|
|
FT_Face face = t42slot->face;
|
|
T42_Face t42face = (T42_Face)face;
|
|
FT_GlyphSlot ttslot;
|
|
FT_Error error = FT_Err_Ok;
|
|
|
|
|
|
if ( !face->glyph )
|
|
{
|
|
/* First glyph slot for this face */
|
|
slot->ttslot = t42face->ttf_face->glyph;
|
|
}
|
|
else
|
|
{
|
|
error = FT_New_GlyphSlot( t42face->ttf_face, &ttslot );
|
|
slot->ttslot = ttslot;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( void )
|
|
T42_GlyphSlot_Done( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */
|
|
{
|
|
T42_GlyphSlot slot = (T42_GlyphSlot)t42slot;
|
|
|
|
|
|
FT_Done_GlyphSlot( slot->ttslot );
|
|
}
|
|
|
|
|
|
static void
|
|
t42_glyphslot_clear( FT_GlyphSlot slot )
|
|
{
|
|
/* free bitmap if needed */
|
|
ft_glyphslot_free_bitmap( slot );
|
|
|
|
/* clear all public fields in the glyph slot */
|
|
FT_ZERO( &slot->metrics );
|
|
FT_ZERO( &slot->outline );
|
|
FT_ZERO( &slot->bitmap );
|
|
|
|
slot->bitmap_left = 0;
|
|
slot->bitmap_top = 0;
|
|
slot->num_subglyphs = 0;
|
|
slot->subglyphs = NULL;
|
|
slot->control_data = NULL;
|
|
slot->control_len = 0;
|
|
slot->other = NULL;
|
|
slot->format = FT_GLYPH_FORMAT_NONE;
|
|
|
|
slot->linearHoriAdvance = 0;
|
|
slot->linearVertAdvance = 0;
|
|
}
|
|
|
|
|
|
FT_LOCAL_DEF( FT_Error )
|
|
T42_GlyphSlot_Load( FT_GlyphSlot glyph,
|
|
FT_Size size,
|
|
FT_UInt glyph_index,
|
|
FT_Int32 load_flags )
|
|
{
|
|
FT_Error error;
|
|
T42_GlyphSlot t42slot = (T42_GlyphSlot)glyph;
|
|
T42_Size t42size = (T42_Size)size;
|
|
T42_Face t42face = (T42_Face)size->face;
|
|
FT_Driver_Class ttclazz = ((T42_Driver)glyph->face->driver)->ttclazz;
|
|
|
|
|
|
FT_TRACE1(( "T42_GlyphSlot_Load: glyph index %d\n", glyph_index ));
|
|
|
|
/* map T42 glyph index to embedded TTF's glyph index */
|
|
glyph_index = (FT_UInt)ft_strtol(
|
|
(const char *)t42face->type1.charstrings[glyph_index],
|
|
NULL, 10 );
|
|
|
|
t42_glyphslot_clear( t42slot->ttslot );
|
|
error = ttclazz->load_glyph( t42slot->ttslot,
|
|
t42size->ttsize,
|
|
glyph_index,
|
|
load_flags | FT_LOAD_NO_BITMAP );
|
|
|
|
if ( !error )
|
|
{
|
|
glyph->metrics = t42slot->ttslot->metrics;
|
|
|
|
glyph->linearHoriAdvance = t42slot->ttslot->linearHoriAdvance;
|
|
glyph->linearVertAdvance = t42slot->ttslot->linearVertAdvance;
|
|
|
|
glyph->format = t42slot->ttslot->format;
|
|
glyph->outline = t42slot->ttslot->outline;
|
|
|
|
glyph->bitmap = t42slot->ttslot->bitmap;
|
|
glyph->bitmap_left = t42slot->ttslot->bitmap_left;
|
|
glyph->bitmap_top = t42slot->ttslot->bitmap_top;
|
|
|
|
glyph->num_subglyphs = t42slot->ttslot->num_subglyphs;
|
|
glyph->subglyphs = t42slot->ttslot->subglyphs;
|
|
|
|
glyph->control_data = t42slot->ttslot->control_data;
|
|
glyph->control_len = t42slot->ttslot->control_len;
|
|
}
|
|
|
|
return error;
|
|
}
|
|
|
|
|
|
/* END */
|