ref: d6a5c57727643fc7a0d30e10776edf9c2c5956ae
dir: /src/cff/cffcmap.c/
/****************************************************************************
*
* cffcmap.c
*
* CFF character mapping table (cmap) support (body).
*
* Copyright (C) 2002-2021 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 <freetype/internal/ftdebug.h>
#include "cffcmap.h"
#include "cffload.h"
#include "cfferrs.h"
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CALLBACK_DEF( FT_Error )
cff_cmap_encoding_init( CFF_CMapStd cmap,
FT_Pointer pointer )
{
TT_Face face = (TT_Face)FT_CMAP_FACE( cmap );
CFF_Font cff = (CFF_Font)face->extra.data;
CFF_Encoding encoding = &cff->encoding;
FT_UNUSED( pointer );
cmap->gids = encoding->codes;
return 0;
}
FT_CALLBACK_DEF( void )
cff_cmap_encoding_done( CFF_CMapStd cmap )
{
cmap->gids = NULL;
}
FT_CALLBACK_DEF( FT_UInt )
cff_cmap_encoding_char_index( CFF_CMapStd cmap,
FT_UInt32 char_code )
{
FT_UInt result = 0;
if ( char_code < 256 )
result = cmap->gids[char_code];
return result;
}
FT_CALLBACK_DEF( FT_UInt32 )
cff_cmap_encoding_char_next( CFF_CMapStd cmap,
FT_UInt32 *pchar_code )
{
FT_UInt result = 0;
FT_UInt32 char_code = *pchar_code;
*pchar_code = 0;
if ( char_code < 255 )
{
FT_UInt code = (FT_UInt)(char_code + 1);
for (;;)
{
if ( code >= 256 )
break;
result = cmap->gids[code];
if ( result != 0 )
{
*pchar_code = code;
break;
}
code++;
}
}
return result;
}
FT_DEFINE_CMAP_CLASS(
cff_cmap_encoding_class_rec,
sizeof ( CFF_CMapStdRec ),
(FT_CMap_InitFunc) cff_cmap_encoding_init, /* init */
(FT_CMap_DoneFunc) cff_cmap_encoding_done, /* done */
(FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, /* char_index */
(FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, /* char_next */
(FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
(FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
(FT_CMap_VariantListFunc) NULL, /* variant_list */
(FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
(FT_CMap_VariantCharListFunc) NULL /* variantchar_list */
)
/*************************************************************************/
/*************************************************************************/
/***** *****/
/***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/
/***** *****/
/*************************************************************************/
/*************************************************************************/
FT_CALLBACK_DEF( const char* )
cff_sid_to_glyph_name( TT_Face face,
FT_UInt idx )
{
CFF_Font cff = (CFF_Font)face->extra.data;
CFF_Charset charset = &cff->charset;
FT_UInt sid = charset->sids[idx];
return cff_index_get_sid_string( cff, sid );
}
FT_CALLBACK_DEF( FT_Error )
cff_cmap_unicode_init( PS_Unicodes unicodes,
FT_Pointer pointer )
{
TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
FT_Memory memory = FT_FACE_MEMORY( face );
CFF_Font cff = (CFF_Font)face->extra.data;
CFF_Charset charset = &cff->charset;
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
FT_UNUSED( pointer );
/* can't build Unicode map for CID-keyed font */
/* because we don't know glyph names. */
if ( !charset->sids )
return FT_THROW( No_Unicode_Glyph_Name );
if ( !psnames->unicodes_init )
return FT_THROW( Unimplemented_Feature );
return psnames->unicodes_init( memory,
unicodes,
cff->num_glyphs,
(PS_GetGlyphNameFunc)&cff_sid_to_glyph_name,
(PS_FreeGlyphNameFunc)NULL,
(FT_Pointer)face );
}
FT_CALLBACK_DEF( void )
cff_cmap_unicode_done( PS_Unicodes unicodes )
{
FT_Face face = FT_CMAP_FACE( unicodes );
FT_Memory memory = FT_FACE_MEMORY( face );
FT_FREE( unicodes->maps );
unicodes->num_maps = 0;
}
FT_CALLBACK_DEF( FT_UInt )
cff_cmap_unicode_char_index( PS_Unicodes unicodes,
FT_UInt32 char_code )
{
TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
CFF_Font cff = (CFF_Font)face->extra.data;
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
return psnames->unicodes_char_index( unicodes, char_code );
}
FT_CALLBACK_DEF( FT_UInt32 )
cff_cmap_unicode_char_next( PS_Unicodes unicodes,
FT_UInt32 *pchar_code )
{
TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes );
CFF_Font cff = (CFF_Font)face->extra.data;
FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
return psnames->unicodes_char_next( unicodes, pchar_code );
}
FT_DEFINE_CMAP_CLASS(
cff_cmap_unicode_class_rec,
sizeof ( PS_UnicodesRec ),
(FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */
(FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */
(FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */
(FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */
(FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
(FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
(FT_CMap_VariantListFunc) NULL, /* variant_list */
(FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
(FT_CMap_VariantCharListFunc) NULL /* variantchar_list */
)
/* END */