Edit
kc3-lang/freetype/src/type42/t42objs.c
Werner Lemberg
- src/type42/t42objs.c
-
/**************************************************************************** * * t42objs.c * * Type 42 objects manager (body). * * Copyright (C) 2002-2023 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; face->ttf_data = NULL; face->ttf_size = 0; 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 ); if ( error ) { FT_FREE( face->ttf_data ); face->ttf_size = 0; } 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 ); if ( !error ) 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_Memory memory = face->memory; 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 ); if ( !error ) slot->ttslot = ttslot; } /* share the loader so that the autohinter can see it */ FT_GlyphLoader_Done( slot->ttslot->internal->loader ); FT_FREE( slot->ttslot->internal ); slot->ttslot->internal = t42slot->internal; return error; } FT_LOCAL_DEF( void ) T42_GlyphSlot_Done( FT_GlyphSlot t42slot ) /* T42_GlyphSlot */ { T42_GlyphSlot slot = (T42_GlyphSlot)t42slot; /* do not destroy the inherited internal structure just yet */ slot->ttslot->internal = NULL; 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 */