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kc3-lang/freetype/src/cff/cffcmap.c
Werner Lemberg
- src/cff/cffcmap.c
-
/**************************************************************************** * * cffcmap.c * * CFF character mapping table (cmap) support (body). * * Copyright (C) 2002-2019 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 <ft2build.h> #include FT_INTERNAL_DEBUG_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 */