ref: 2a98b3c431091de7434f9bde087a4f5c47f463ba
dir: /src/cid/cidriver.c/
/***************************************************************************/
/* */
/* cidriver.c */
/* */
/* CID driver interface (body). */
/* */
/* Copyright 1996-2000 by */
/* David Turner, Robert Wilhelm, and Werner Lemberg. */
/* */
/* 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 <cidriver.h>
#include <cidgload.h>
#include <cidafm.h>
#include <freetype/internal/ftdebug.h>
#include <freetype/internal/ftstream.h>
#include <freetype/internal/psnames.h>
#include <string.h> /* for strcmp() */
/*************************************************************************/
/* */
/* The macro FT_COMPONENT is used in trace mode. It is an implicit */
/* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */
/* messages during execution. */
/* */
#undef FT_COMPONENT
#define FT_COMPONENT trace_ciddriver
static
FT_Module_Interface CID_Get_Interface( FT_Driver driver,
const FT_String* interface )
{
UNUSED( driver );
UNUSED( interface );
return 0;
}
#ifdef xxxT1_CONFIG_OPTION_NO_AFM
static
FT_Error cid_Get_Kerning( T1_Face face,
FT_UInt left_glyph,
FT_UInt right_glyph,
FT_Vector* kerning )
{
T1_AFM* afm;
kerning->x = 0;
kerning->y = 0;
afm = (T1_AFM*)face->afm_data;
if ( afm )
CID_Get_Kerning( afm, left_glyph, right_glyph, kerning );
return T1_Err_Ok;
}
#endif /* xxxT1_CONFIG_OPTION_NO_AFM */
/*************************************************************************/
/* */
/* <Function> */
/* cid_get_char_index */
/* */
/* <Description> */
/* Uses a charmap to return a given character code's glyph index. */
/* */
/* <Input> */
/* charmap :: A handle to the source charmap object. */
/* charcode :: The character code. */
/* */
/* <Return> */
/* Glyph index. 0 means `undefined character code'. */
/* */
static
FT_UInt CID_Get_Char_Index( FT_CharMap charmap,
FT_Long charcode )
{
T1_Face face;
FT_UInt result = 0;
PSNames_Interface* psnames;
face = (T1_Face)charmap->face;
psnames = (PSNames_Interface*)face->psnames;
if ( psnames )
switch ( charmap->encoding )
{
/*******************************************************************/
/* */
/* Unicode encoding support */
/* */
case ft_encoding_unicode:
/* use the `PSNames' module to synthetize the Unicode charmap */
result = psnames->lookup_unicode( &face->unicode_map,
(FT_ULong)charcode );
/* the function returns 0xFFFF if the Unicode charcode has */
/* no corresponding glyph. */
if ( result == 0xFFFF )
result = 0;
goto Exit;
/*******************************************************************/
/* */
/* Custom Type 1 encoding */
/* */
case ft_encoding_adobe_custom:
{
T1_Encoding* encoding = &face->type1.encoding;
if ( charcode >= encoding->code_first &&
charcode <= encoding->code_last )
result = encoding->char_index[charcode];
goto Exit;
}
/*******************************************************************/
/* */
/* Adobe Standard & Expert encoding support */
/* */
default:
if ( charcode < 256 )
{
FT_UInt code;
FT_Int n;
const char* glyph_name;
code = psnames->adobe_std_encoding[charcode];
if ( charmap->encoding == ft_encoding_adobe_expert )
code = psnames->adobe_expert_encoding[charcode];
glyph_name = psnames->adobe_std_strings( code );
if ( !glyph_name )
break;
for ( n = 0; n < face->type1.num_glyphs; n++ )
{
const char* gname = face->type1.glyph_names[n];
if ( gname && gname[0] == glyph_name[0] &&
strcmp( gname, glyph_name ) == 0 )
{
result = n;
break;
}
}
}
}
Exit:
return result;
}
const FT_Driver_Class t1cid_driver_class =
{
/* firs of all, the FT_Module_Class fields */
{
ft_module_font_driver | ft_module_driver_scalable,
sizeof( FT_DriverRec ),
"t1cid", /* module name */
0x10000, /* version 1.0 of driver */
0x20000, /* requires FreeType 2.0 */
0,
(FT_Module_Constructor) CID_Init_Driver,
(FT_Module_Destructor) CID_Done_Driver,
(FT_Module_Requester) CID_Get_Interface
},
/* then the other font drivers fields */
sizeof( CID_FaceRec ),
sizeof( T1_SizeRec ),
sizeof( T1_GlyphSlotRec ),
(FTDriver_initFace) CID_Init_Face,
(FTDriver_doneFace) CID_Done_Face,
(FTDriver_initSize) 0,
(FTDriver_doneSize) 0,
(FTDriver_initGlyphSlot) 0,
(FTDriver_doneGlyphSlot) 0,
(FTDriver_setCharSizes) 0,
(FTDriver_setPixelSizes) 0,
(FTDriver_loadGlyph) CID_Load_Glyph,
(FTDriver_getCharIndex) CID_Get_Char_Index,
#ifndef xxxxT1_CONFIG_OPTION_NO_AFM
(FTDriver_getKerning) 0,
(FTDriver_attachFile) 0,
#else
(FTDriver_getKerning) cid_Get_Kerning,
(FTDriver_attachFile) CID_Read_AFM,
#endif
(FTDriver_getAdvances) 0
};
/* END */