231 lines
7.1 KiB
C
231 lines
7.1 KiB
C
/****************************************************************************
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*
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* cffcmap.c
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*
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* CFF character mapping table (cmap) support (body).
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*
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* Copyright (C) 2002-2024 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 <freetype/internal/ftdebug.h>
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#include "cffcmap.h"
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#include "cffload.h"
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#include "cfferrs.h"
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_CALLBACK_DEF( FT_Error )
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cff_cmap_encoding_init( FT_CMap cmap,
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FT_Pointer pointer )
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{
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CFF_CMapStd cffcmap = (CFF_CMapStd)cmap;
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TT_Face face = (TT_Face)FT_CMAP_FACE( cmap );
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CFF_Font cff = (CFF_Font)face->extra.data;
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CFF_Encoding encoding = &cff->encoding;
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FT_UNUSED( pointer );
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cffcmap->gids = encoding->codes;
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return 0;
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}
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FT_CALLBACK_DEF( void )
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cff_cmap_encoding_done( FT_CMap cmap )
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{
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CFF_CMapStd cffcmap = (CFF_CMapStd)cmap;
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cffcmap->gids = NULL;
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}
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FT_CALLBACK_DEF( FT_UInt )
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cff_cmap_encoding_char_index( FT_CMap cmap,
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FT_UInt32 char_code )
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{
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CFF_CMapStd cffcmap = (CFF_CMapStd)cmap;
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FT_UInt result = 0;
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if ( char_code < 256 )
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result = cffcmap->gids[char_code];
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return result;
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}
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FT_CALLBACK_DEF( FT_UInt )
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cff_cmap_encoding_char_next( FT_CMap cmap,
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FT_UInt32 *pchar_code )
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{
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CFF_CMapStd cffcmap = (CFF_CMapStd)cmap;
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FT_UInt result = 0;
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FT_UInt32 char_code = *pchar_code;
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while ( char_code < 255 )
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{
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result = cffcmap->gids[++char_code];
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if ( result )
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{
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*pchar_code = char_code;
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break;
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}
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}
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return result;
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}
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FT_DEFINE_CMAP_CLASS(
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cff_cmap_encoding_class_rec,
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sizeof ( CFF_CMapStdRec ),
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(FT_CMap_InitFunc) cff_cmap_encoding_init, /* init */
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(FT_CMap_DoneFunc) cff_cmap_encoding_done, /* done */
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(FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, /* char_index */
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(FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, /* char_next */
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(FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
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(FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
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(FT_CMap_VariantListFunc) NULL, /* variant_list */
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(FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
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(FT_CMap_VariantCharListFunc) NULL /* variantchar_list */
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)
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/*************************************************************************/
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/*************************************************************************/
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/***** *****/
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/***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/
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/***** *****/
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/*************************************************************************/
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/*************************************************************************/
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FT_CALLBACK_DEF( const char* )
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cff_sid_to_glyph_name( void* face_, /* TT_Face */
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FT_UInt idx )
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{
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TT_Face face = (TT_Face)face_;
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CFF_Font cff = (CFF_Font)face->extra.data;
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CFF_Charset charset = &cff->charset;
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FT_UInt sid = charset->sids[idx];
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return cff_index_get_sid_string( cff, sid );
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}
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FT_CALLBACK_DEF( FT_Error )
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cff_cmap_unicode_init( FT_CMap cmap, /* PS_Unicodes */
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FT_Pointer pointer )
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{
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PS_Unicodes unicodes = (PS_Unicodes)cmap;
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TT_Face face = (TT_Face)FT_CMAP_FACE( cmap );
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FT_Memory memory = FT_FACE_MEMORY( face );
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CFF_Font cff = (CFF_Font)face->extra.data;
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CFF_Charset charset = &cff->charset;
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
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FT_UNUSED( pointer );
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/* can't build Unicode map for CID-keyed font */
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/* because we don't know glyph names. */
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if ( !charset->sids )
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return FT_THROW( No_Unicode_Glyph_Name );
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if ( !psnames->unicodes_init )
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return FT_THROW( Unimplemented_Feature );
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return psnames->unicodes_init( memory,
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unicodes,
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cff->num_glyphs,
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&cff_sid_to_glyph_name,
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(PS_FreeGlyphNameFunc)NULL,
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(FT_Pointer)face );
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}
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FT_CALLBACK_DEF( void )
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cff_cmap_unicode_done( FT_CMap cmap ) /* PS_Unicodes */
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{
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PS_Unicodes unicodes = (PS_Unicodes)cmap;
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FT_Face face = FT_CMAP_FACE( cmap );
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FT_Memory memory = FT_FACE_MEMORY( face );
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FT_FREE( unicodes->maps );
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unicodes->num_maps = 0;
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}
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FT_CALLBACK_DEF( FT_UInt )
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cff_cmap_unicode_char_index( FT_CMap cmap, /* PS_Unicodes */
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FT_UInt32 char_code )
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{
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PS_Unicodes unicodes = (PS_Unicodes)cmap;
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TT_Face face = (TT_Face)FT_CMAP_FACE( cmap );
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CFF_Font cff = (CFF_Font)face->extra.data;
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
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return psnames->unicodes_char_index( unicodes, char_code );
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}
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FT_CALLBACK_DEF( FT_UInt )
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cff_cmap_unicode_char_next( FT_CMap cmap, /* PS_Unicodes */
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FT_UInt32 *pchar_code )
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{
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PS_Unicodes unicodes = (PS_Unicodes)cmap;
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TT_Face face = (TT_Face)FT_CMAP_FACE( cmap );
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CFF_Font cff = (CFF_Font)face->extra.data;
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FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames;
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return psnames->unicodes_char_next( unicodes, pchar_code );
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}
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FT_DEFINE_CMAP_CLASS(
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cff_cmap_unicode_class_rec,
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sizeof ( PS_UnicodesRec ),
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(FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */
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(FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */
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(FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */
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(FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */
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(FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */
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(FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */
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(FT_CMap_VariantListFunc) NULL, /* variant_list */
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(FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */
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(FT_CMap_VariantCharListFunc) NULL /* variantchar_list */
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)
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/* END */
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