forked from minhngoc25a/freetype2
247 lines
6.2 KiB
C
247 lines
6.2 KiB
C
/****************************************************************************
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*
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* t42drivr.c
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*
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* High-level Type 42 driver interface (body).
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*
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* Copyright (C) 2002-2022 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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/**************************************************************************
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*
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* This driver implements Type42 fonts as described in the
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* Technical Note #5012 from Adobe, with these limitations:
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*
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* 1) CID Fonts are not currently supported.
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* 2) Incremental fonts making use of the GlyphDirectory keyword
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* will be loaded, but the rendering will be using the TrueType
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* tables.
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* 3) As for Type1 fonts, CDevProc is not supported.
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* 4) The Metrics dictionary is not supported.
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* 5) AFM metrics are not supported.
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*
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* In other words, this driver supports Type42 fonts derived from
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* TrueType fonts in a non-CID manner, as done by usual conversion
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* programs.
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*
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*/
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#include "t42drivr.h"
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#include "t42objs.h"
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#include "t42error.h"
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/services/svfntfmt.h>
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#include <freetype/internal/services/svgldict.h>
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#include <freetype/internal/services/svpostnm.h>
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#include <freetype/internal/services/svpsinfo.h>
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#undef FT_COMPONENT
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#define FT_COMPONENT t42
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/*
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*
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* GLYPH DICT SERVICE
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*
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*/
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static FT_Error
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t42_get_glyph_name( T42_Face face,
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FT_UInt glyph_index,
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FT_Pointer buffer,
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FT_UInt buffer_max )
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{
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FT_STRCPYN( buffer, face->type1.glyph_names[glyph_index], buffer_max );
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return FT_Err_Ok;
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}
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static FT_UInt
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t42_get_name_index( T42_Face face,
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const FT_String* glyph_name )
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{
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FT_Int i;
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for ( i = 0; i < face->type1.num_glyphs; i++ )
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{
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FT_String* gname = face->type1.glyph_names[i];
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if ( glyph_name[0] == gname[0] && !ft_strcmp( glyph_name, gname ) )
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return (FT_UInt)ft_strtol( (const char *)face->type1.charstrings[i],
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NULL, 10 );
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}
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return 0;
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}
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static const FT_Service_GlyphDictRec t42_service_glyph_dict =
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{
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(FT_GlyphDict_GetNameFunc) t42_get_glyph_name, /* get_name */
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(FT_GlyphDict_NameIndexFunc)t42_get_name_index /* name_index */
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};
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/*
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*
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* POSTSCRIPT NAME SERVICE
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*
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*/
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static const char*
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t42_get_ps_font_name( T42_Face face )
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{
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return (const char*)face->type1.font_name;
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}
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static const FT_Service_PsFontNameRec t42_service_ps_font_name =
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{
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(FT_PsName_GetFunc)t42_get_ps_font_name /* get_ps_font_name */
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};
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/*
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*
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* POSTSCRIPT INFO SERVICE
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*
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*/
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static FT_Error
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t42_ps_get_font_info( FT_Face face,
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PS_FontInfoRec* afont_info )
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{
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*afont_info = ((T42_Face)face)->type1.font_info;
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return FT_Err_Ok;
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}
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static FT_Error
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t42_ps_get_font_extra( FT_Face face,
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PS_FontExtraRec* afont_extra )
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{
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*afont_extra = ((T42_Face)face)->type1.font_extra;
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return FT_Err_Ok;
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}
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static FT_Int
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t42_ps_has_glyph_names( FT_Face face )
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{
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FT_UNUSED( face );
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return 1;
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}
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static FT_Error
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t42_ps_get_font_private( FT_Face face,
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PS_PrivateRec* afont_private )
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{
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*afont_private = ((T42_Face)face)->type1.private_dict;
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return FT_Err_Ok;
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}
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static const FT_Service_PsInfoRec t42_service_ps_info =
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{
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(PS_GetFontInfoFunc) t42_ps_get_font_info, /* ps_get_font_info */
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(PS_GetFontExtraFunc) t42_ps_get_font_extra, /* ps_get_font_extra */
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(PS_HasGlyphNamesFunc) t42_ps_has_glyph_names, /* ps_has_glyph_names */
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(PS_GetFontPrivateFunc)t42_ps_get_font_private, /* ps_get_font_private */
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/* not implemented */
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(PS_GetFontValueFunc) NULL /* ps_get_font_value */
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};
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/*
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*
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* SERVICE LIST
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*
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*/
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static const FT_ServiceDescRec t42_services[] =
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{
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{ FT_SERVICE_ID_GLYPH_DICT, &t42_service_glyph_dict },
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{ FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &t42_service_ps_font_name },
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{ FT_SERVICE_ID_POSTSCRIPT_INFO, &t42_service_ps_info },
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{ FT_SERVICE_ID_FONT_FORMAT, FT_FONT_FORMAT_TYPE_42 },
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{ NULL, NULL }
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};
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FT_CALLBACK_DEF( FT_Module_Interface )
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T42_Get_Interface( FT_Module module,
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const FT_String* t42_interface )
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{
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FT_UNUSED( module );
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return ft_service_list_lookup( t42_services, t42_interface );
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}
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const FT_Driver_ClassRec t42_driver_class =
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{
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{
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FT_MODULE_FONT_DRIVER |
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FT_MODULE_DRIVER_SCALABLE |
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#ifdef TT_USE_BYTECODE_INTERPRETER
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FT_MODULE_DRIVER_HAS_HINTER,
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#else
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0,
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#endif
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sizeof ( T42_DriverRec ),
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"type42",
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0x10000L,
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0x20000L,
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NULL, /* module-specific interface */
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T42_Driver_Init, /* FT_Module_Constructor module_init */
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T42_Driver_Done, /* FT_Module_Destructor module_done */
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T42_Get_Interface, /* FT_Module_Requester get_interface */
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},
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sizeof ( T42_FaceRec ),
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sizeof ( T42_SizeRec ),
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sizeof ( T42_GlyphSlotRec ),
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T42_Face_Init, /* FT_Face_InitFunc init_face */
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T42_Face_Done, /* FT_Face_DoneFunc done_face */
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T42_Size_Init, /* FT_Size_InitFunc init_size */
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T42_Size_Done, /* FT_Size_DoneFunc done_size */
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T42_GlyphSlot_Init, /* FT_Slot_InitFunc init_slot */
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T42_GlyphSlot_Done, /* FT_Slot_DoneFunc done_slot */
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T42_GlyphSlot_Load, /* FT_Slot_LoadFunc load_glyph */
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NULL, /* FT_Face_GetKerningFunc get_kerning */
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NULL, /* FT_Face_AttachFunc attach_file */
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NULL, /* FT_Face_GetAdvancesFunc get_advances */
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T42_Size_Request, /* FT_Size_RequestFunc request_size */
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T42_Size_Select /* FT_Size_SelectFunc select_size */
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};
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/* END */
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