1 /***************************************************************************/ 2 /* */ 3 /* cffcmap.c */ 4 /* */ 5 /* CFF character mapping table (cmap) support (body). */ 6 /* */ 7 /* Copyright 2002-2007, 2010, 2013 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9 /* */ 10 /* This file is part of the FreeType project, and may only be used, */ 11 /* modified, and distributed under the terms of the FreeType project */ 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13 /* this file you indicate that you have read the license and */ 14 /* understand and accept it fully. */ 15 /* */ 16 /***************************************************************************/ 17 18 19 #include <ft2build.h> 20 #include FT_INTERNAL_DEBUG_H 21 #include "cffcmap.h" 22 #include "cffload.h" 23 24 #include "cfferrs.h" 25 26 27 /*************************************************************************/ 28 /*************************************************************************/ 29 /***** *****/ 30 /***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/ 31 /***** *****/ 32 /*************************************************************************/ 33 /*************************************************************************/ 34 35 FT_CALLBACK_DEF( FT_Error ) 36 cff_cmap_encoding_init( CFF_CMapStd cmap ) 37 { 38 TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); 39 CFF_Font cff = (CFF_Font)face->extra.data; 40 CFF_Encoding encoding = &cff->encoding; 41 42 43 cmap->gids = encoding->codes; 44 45 return 0; 46 } 47 48 49 FT_CALLBACK_DEF( void ) 50 cff_cmap_encoding_done( CFF_CMapStd cmap ) 51 { 52 cmap->gids = NULL; 53 } 54 55 56 FT_CALLBACK_DEF( FT_UInt ) 57 cff_cmap_encoding_char_index( CFF_CMapStd cmap, 58 FT_UInt32 char_code ) 59 { 60 FT_UInt result = 0; 61 62 63 if ( char_code < 256 ) 64 result = cmap->gids[char_code]; 65 66 return result; 67 } 68 69 70 FT_CALLBACK_DEF( FT_UInt32 ) 71 cff_cmap_encoding_char_next( CFF_CMapStd cmap, 72 FT_UInt32 *pchar_code ) 73 { 74 FT_UInt result = 0; 75 FT_UInt32 char_code = *pchar_code; 76 77 78 *pchar_code = 0; 79 80 if ( char_code < 255 ) 81 { 82 FT_UInt code = (FT_UInt)(char_code + 1); 83 84 85 for (;;) 86 { 87 if ( code >= 256 ) 88 break; 89 90 result = cmap->gids[code]; 91 if ( result != 0 ) 92 { 93 *pchar_code = code; 94 break; 95 } 96 97 code++; 98 } 99 } 100 return result; 101 } 102 103 104 FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec, 105 sizeof ( CFF_CMapStdRec ), 106 107 (FT_CMap_InitFunc) cff_cmap_encoding_init, 108 (FT_CMap_DoneFunc) cff_cmap_encoding_done, 109 (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, 110 (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, 111 112 NULL, NULL, NULL, NULL, NULL 113 ) 114 115 116 /*************************************************************************/ 117 /*************************************************************************/ 118 /***** *****/ 119 /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ 120 /***** *****/ 121 /*************************************************************************/ 122 /*************************************************************************/ 123 124 FT_CALLBACK_DEF( const char* ) 125 cff_sid_to_glyph_name( TT_Face face, 126 FT_UInt idx ) 127 { 128 CFF_Font cff = (CFF_Font)face->extra.data; 129 CFF_Charset charset = &cff->charset; 130 FT_UInt sid = charset->sids[idx]; 131 132 133 return cff_index_get_sid_string( cff, sid ); 134 } 135 136 137 FT_CALLBACK_DEF( FT_Error ) 138 cff_cmap_unicode_init( PS_Unicodes unicodes ) 139 { 140 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 141 FT_Memory memory = FT_FACE_MEMORY( face ); 142 CFF_Font cff = (CFF_Font)face->extra.data; 143 CFF_Charset charset = &cff->charset; 144 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 145 146 147 /* can't build Unicode map for CID-keyed font */ 148 /* because we don't know glyph names. */ 149 if ( !charset->sids ) 150 return FT_THROW( No_Unicode_Glyph_Name ); 151 152 return psnames->unicodes_init( memory, 153 unicodes, 154 cff->num_glyphs, 155 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, 156 (PS_FreeGlyphNameFunc)NULL, 157 (FT_Pointer)face ); 158 } 159 160 161 FT_CALLBACK_DEF( void ) 162 cff_cmap_unicode_done( PS_Unicodes unicodes ) 163 { 164 FT_Face face = FT_CMAP_FACE( unicodes ); 165 FT_Memory memory = FT_FACE_MEMORY( face ); 166 167 168 FT_FREE( unicodes->maps ); 169 unicodes->num_maps = 0; 170 } 171 172 173 FT_CALLBACK_DEF( FT_UInt ) 174 cff_cmap_unicode_char_index( PS_Unicodes unicodes, 175 FT_UInt32 char_code ) 176 { 177 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 178 CFF_Font cff = (CFF_Font)face->extra.data; 179 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 180 181 182 return psnames->unicodes_char_index( unicodes, char_code ); 183 } 184 185 186 FT_CALLBACK_DEF( FT_UInt32 ) 187 cff_cmap_unicode_char_next( PS_Unicodes unicodes, 188 FT_UInt32 *pchar_code ) 189 { 190 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 191 CFF_Font cff = (CFF_Font)face->extra.data; 192 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 193 194 195 return psnames->unicodes_char_next( unicodes, pchar_code ); 196 } 197 198 199 FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec, 200 sizeof ( PS_UnicodesRec ), 201 202 (FT_CMap_InitFunc) cff_cmap_unicode_init, 203 (FT_CMap_DoneFunc) cff_cmap_unicode_done, 204 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, 205 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, 206 207 NULL, NULL, NULL, NULL, NULL 208 ) 209 210 /* END */ 211
