Edit
kc3-lang/freetype/src/type42/t42drivr.c
Werner Lemberg
- src/type42/t42drivr.c
-
/**************************************************************************** * * t42drivr.c * * High-level Type 42 driver interface (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. * */ /************************************************************************** * * This driver implements Type42 fonts as described in the * Technical Note #5012 from Adobe, with these limitations: * * 1) CID Fonts are not currently supported. * 2) Incremental fonts making use of the GlyphDirectory keyword * will be loaded, but the rendering will be using the TrueType * tables. * 3) As for Type1 fonts, CDevProc is not supported. * 4) The Metrics dictionary is not supported. * 5) AFM metrics are not supported. * * In other words, this driver supports Type42 fonts derived from * TrueType fonts in a non-CID manner, as done by usual conversion * programs. * */ #include "t42drivr.h" #include "t42objs.h" #include "t42error.h" #include <freetype/internal/ftdebug.h> #include <freetype/internal/services/svfntfmt.h> #include <freetype/internal/services/svgldict.h> #include <freetype/internal/services/svpostnm.h> #include <freetype/internal/services/svpsinfo.h> #undef FT_COMPONENT #define FT_COMPONENT t42 /* * * GLYPH DICT SERVICE * */ static FT_Error t42_get_glyph_name( T42_Face face, FT_UInt glyph_index, FT_Pointer buffer, FT_UInt buffer_max ) { FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max ); return FT_Err_Ok; } static FT_UInt t42_get_name_index( T42_Face face, const FT_String* glyph_name ) { FT_Int i; for ( i = 0; i < face->type1.num_glyphs; i++ ) { FT_String* gname = face->type1.glyph_names[i]; if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) ) return (FT_UInt)ft_strtol( (const char *)face->type1.charstrings[i], NULL, 10 ); } return 0; } static const FT_Service_GlyphDictRec t42_service_glyph_dict = { (FT_GlyphDict_GetNameFunc) t42_get_glyph_name, /* get_name */ (FT_GlyphDict_NameIndexFunc)t42_get_name_index /* name_index */ }; /* * * POSTSCRIPT NAME SERVICE * */ static const char* t42_get_ps_font_name( T42_Face face ) { return (const char*)face->type1.font_name; } static const FT_Service_PsFontNameRec t42_service_ps_font_name = { (FT_PsName_GetFunc)t42_get_ps_font_name /* get_ps_font_name */ }; /* * * POSTSCRIPT INFO SERVICE * */ static FT_Error t42_ps_get_font_info( FT_Face face, PS_FontInfoRec* afont_info ) { *afont_info = ((T42_Face)face)->type1.font_info; return FT_Err_Ok; } static FT_Error t42_ps_get_font_extra( FT_Face face, PS_FontExtraRec* afont_extra ) { *afont_extra = ((T42_Face)face)->type1.font_extra; return FT_Err_Ok; } static FT_Int t42_ps_has_glyph_names( FT_Face face ) { FT_UNUSED( face ); return 1; } static const FT_Service_PsInfoRec t42_service_ps_info = { (PS_GetFontInfoFunc) t42_ps_get_font_info, /* ps_get_font_info */ (PS_GetFontExtraFunc) t42_ps_get_font_extra, /* ps_get_font_extra */ (PS_HasGlyphNamesFunc) t42_ps_has_glyph_names, /* ps_has_glyph_names */ /* Type42 fonts don't have a Private dict */ (PS_GetFontPrivateFunc)NULL, /* ps_get_font_private */ /* not implemented */ (PS_GetFontValueFunc) NULL /* ps_get_font_value */ }; /* * * SERVICE LIST * */ static const FT_ServiceDescRec t42_services[] = { { FT_SERVICE_ID_GLYPH_DICT, &t42_service_glyph_dict }, { FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name }, { FT_SERVICE_ID_POSTSCRIPT_INFO, &t42_service_ps_info }, { FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_42 }, { NULL, NULL } }; FT_CALLBACK_DEF( FT_Module_Interface ) T42_Get_Interface( FT_Module module, const FT_String* t42_interface ) { FT_UNUSED( module ); return ft_service_list_lookup( t42_services, t42_interface ); } const FT_Driver_ClassRec t42_driver_class = { { FT_MODULE_FONT_DRIVER | FT_MODULE_DRIVER_SCALABLE | #ifdef TT_USE_BYTECODE_INTERPRETER FT_MODULE_DRIVER_HAS_HINTER, #else 0, #endif sizeof ( T42_DriverRec ), "type42", 0x10000L, 0x20000L, NULL, /* module-specific interface */ T42_Driver_Init, /* FT_Module_Constructor module_init */ T42_Driver_Done, /* FT_Module_Destructor module_done */ T42_Get_Interface, /* FT_Module_Requester get_interface */ }, sizeof ( T42_FaceRec ), sizeof ( T42_SizeRec ), sizeof ( T42_GlyphSlotRec ), T42_Face_Init, /* FT_Face_InitFunc init_face */ T42_Face_Done, /* FT_Face_DoneFunc done_face */ T42_Size_Init, /* FT_Size_InitFunc init_size */ T42_Size_Done, /* FT_Size_DoneFunc done_size */ T42_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */ T42_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */ T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */ NULL, /* FT_Face_GetKerningFunc get_kerning */ NULL, /* FT_Face_AttachFunc attach_file */ NULL, /* FT_Face_GetAdvancesFunc get_advances */ T42_Size_Request, /* FT_Size_RequestFunc request_size */ T42_Size_Select /* FT_Size_SelectFunc select_size */ }; /* END */