228 lines
7.8 KiB
C
228 lines
7.8 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 <cidriver.h>
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#include <cidgload.h>
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#include <cidafm.h>
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#include <freetype/internal/ftdebug.h>
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#include <freetype/internal/ftstream.h>
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#include <freetype/internal/psnames.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
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FT_Module_Interface CID_Get_Interface( FT_Driver driver,
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const FT_String* interface )
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{
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UNUSED( driver );
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UNUSED( interface );
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return 0;
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}
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#ifdef xxxT1_CONFIG_OPTION_NO_AFM
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static
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FT_Error 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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T1_AFM* afm;
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kerning->x = 0;
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kerning->y = 0;
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afm = (T1_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 T1_Err_Ok;
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}
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#endif /* xxxT1_CONFIG_OPTION_NO_AFM */
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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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/* 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
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FT_UInt 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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const FT_Driver_Class t1cid_driver_class =
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{
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/* firs 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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0x10000, /* version 1.0 of driver */
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0x20000, /* 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( T1_SizeRec ),
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sizeof( T1_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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#ifndef xxxxT1_CONFIG_OPTION_NO_AFM
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(FTDriver_getKerning) 0,
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(FTDriver_attachFile) 0,
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#else
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(FTDriver_getKerning) cid_Get_Kerning,
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(FTDriver_attachFile) CID_Read_AFM,
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#endif
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(FTDriver_getAdvances) 0
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};
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/* END */
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