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