254 lines
9.3 KiB
C
254 lines
9.3 KiB
C
/***************************************************************************/
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/* */
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/* cidriver.c */
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/* */
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/* CID driver interface (body). */
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/* */
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/* Copyright 1996-2000 by */
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/* David Turner, Robert Wilhelm, and Werner Lemberg. */
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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 <ft2build.h>
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#include "cidriver.h"
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#include "cidgload.h"
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#include FT_INTERNAL_DEBUG_H
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#include FT_INTERNAL_STREAM_H
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#include FT_INTERNAL_POSTSCRIPT_NAMES_H
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#include "ciderrs.h"
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#include <string.h> /* for strcmp() */
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/*************************************************************************/
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/* */
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/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
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/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
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/* messages during execution. */
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/* */
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#undef FT_COMPONENT
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#define FT_COMPONENT trace_ciddriver
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static FT_Module_Interface
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CID_Get_Interface( FT_Driver driver,
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const FT_String* interface )
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{
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FT_UNUSED( driver );
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FT_UNUSED( interface );
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return 0;
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}
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#if 0 /* unimplemented yet */
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static FT_Error
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cid_Get_Kerning( T1_Face face,
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FT_UInt left_glyph,
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FT_UInt right_glyph,
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FT_Vector* kerning )
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{
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CID_AFM* afm;
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kerning->x = 0;
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kerning->y = 0;
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afm = (CID_AFM*)face->afm_data;
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if ( afm )
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CID_Get_Kerning( afm, left_glyph, right_glyph, kerning );
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return CID_Err_Ok;
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}
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#endif /* 0 */
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/*************************************************************************/
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/* */
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/* <Function> */
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/* Cid_Get_Char_Index */
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/* */
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/* <Description> */
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/* Uses a charmap to return a given character code's glyph index. */
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/* */
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/* <Input> */
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/* charmap :: A handle to the source charmap object. */
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/* */
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/* charcode :: The character code. */
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/* */
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/* <Return> */
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/* Glyph index. 0 means `undefined character code'. */
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/* */
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static FT_UInt
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CID_Get_Char_Index( FT_CharMap charmap,
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FT_Long charcode )
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{
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T1_Face face;
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FT_UInt result = 0;
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PSNames_Interface* psnames;
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face = (T1_Face)charmap->face;
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psnames = (PSNames_Interface*)face->psnames;
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if ( psnames )
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switch ( charmap->encoding )
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{
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/*******************************************************************/
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/* */
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/* Unicode encoding support */
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/* */
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case ft_encoding_unicode:
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/* use the `PSNames' module to synthetize the Unicode charmap */
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result = psnames->lookup_unicode( &face->unicode_map,
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(FT_ULong)charcode );
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/* the function returns 0xFFFF if the Unicode charcode has */
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/* no corresponding glyph. */
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if ( result == 0xFFFF )
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result = 0;
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goto Exit;
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/*******************************************************************/
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/* */
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/* Custom Type 1 encoding */
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/* */
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case ft_encoding_adobe_custom:
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{
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T1_Encoding* encoding = &face->type1.encoding;
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if ( charcode >= encoding->code_first &&
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charcode <= encoding->code_last )
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result = encoding->char_index[charcode];
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goto Exit;
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}
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/*******************************************************************/
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/* */
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/* Adobe Standard & Expert encoding support */
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/* */
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default:
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if ( charcode < 256 )
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{
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FT_UInt code;
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FT_Int n;
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const char* glyph_name;
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code = psnames->adobe_std_encoding[charcode];
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if ( charmap->encoding == ft_encoding_adobe_expert )
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code = psnames->adobe_expert_encoding[charcode];
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glyph_name = psnames->adobe_std_strings( code );
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if ( !glyph_name )
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break;
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for ( n = 0; n < face->type1.num_glyphs; n++ )
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{
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const char* gname = face->type1.glyph_names[n];
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if ( gname && gname[0] == glyph_name[0] &&
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strcmp( gname, glyph_name ) == 0 )
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{
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result = n;
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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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Exit:
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return result;
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}
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FT_CALLBACK_TABLE_DEF
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const FT_Driver_Class t1cid_driver_class =
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{
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/* first of all, the FT_Module_Class fields */
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{
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ft_module_font_driver | ft_module_driver_scalable,
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sizeof( FT_DriverRec ),
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"t1cid", /* module name */
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0x10000L, /* version 1.0 of driver */
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0x20000L, /* requires FreeType 2.0 */
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0,
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(FT_Module_Constructor)CID_Init_Driver,
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(FT_Module_Destructor) CID_Done_Driver,
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(FT_Module_Requester) CID_Get_Interface
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},
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/* then the other font drivers fields */
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sizeof( CID_FaceRec ),
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sizeof( CID_SizeRec ),
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sizeof( CID_GlyphSlotRec ),
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(FTDriver_initFace) CID_Init_Face,
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(FTDriver_doneFace) CID_Done_Face,
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(FTDriver_initSize) 0,
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(FTDriver_doneSize) 0,
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(FTDriver_initGlyphSlot)0,
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(FTDriver_doneGlyphSlot)0,
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(FTDriver_setCharSizes) 0,
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(FTDriver_setPixelSizes)0,
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(FTDriver_loadGlyph) CID_Load_Glyph,
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(FTDriver_getCharIndex) CID_Get_Char_Index,
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(FTDriver_getKerning) 0,
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(FTDriver_attachFile) 0,
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(FTDriver_getAdvances) 0
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};
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#ifdef FT_CONFIG_OPTION_DYNAMIC_DRIVERS
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/*************************************************************************/
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/* */
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/* <Function> */
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/* getDriverClass */
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/* */
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/* <Description> */
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/* This function is used when compiling the TrueType driver as a */
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/* shared library (`.DLL' or `.so'). It will be used by the */
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/* high-level library of FreeType to retrieve the address of the */
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/* driver's generic interface. */
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/* */
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/* It shouldn't be implemented in a static build, as each driver must */
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/* have the same function as an exported entry point. */
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/* */
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/* <Return> */
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/* The address of the TrueType's driver generic interface. The */
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/* format-specific interface can then be retrieved through the method */
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/* interface->get_format_interface. */
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/* */
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FT_EXPORT_DEF( const FT_Driver_Class* )
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getDriverClass( void )
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{
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return &t1cid_driver_class;
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}
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#endif /* CONFIG_OPTION_DYNAMIC_DRIVERS */
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/* END */
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