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 FT_Pointer pointer ) 38 { 39 TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); 40 CFF_Font cff = (CFF_Font)face->extra.data; 41 CFF_Encoding encoding = &cff->encoding; 42 43 FT_UNUSED( pointer ); 44 45 46 cmap->gids = encoding->codes; 47 48 return 0; 49 } 50 51 52 FT_CALLBACK_DEF( void ) 53 cff_cmap_encoding_done( CFF_CMapStd cmap ) 54 { 55 cmap->gids = NULL; 56 } 57 58 59 FT_CALLBACK_DEF( FT_UInt ) 60 cff_cmap_encoding_char_index( CFF_CMapStd cmap, 61 FT_UInt32 char_code ) 62 { 63 FT_UInt result = 0; 64 65 66 if ( char_code < 256 ) 67 result = cmap->gids[char_code]; 68 69 return result; 70 } 71 72 73 FT_CALLBACK_DEF( FT_UInt32 ) 74 cff_cmap_encoding_char_next( CFF_CMapStd cmap, 75 FT_UInt32 *pchar_code ) 76 { 77 FT_UInt result = 0; 78 FT_UInt32 char_code = *pchar_code; 79 80 81 *pchar_code = 0; 82 83 if ( char_code < 255 ) 84 { 85 FT_UInt code = (FT_UInt)(char_code + 1); 86 87 88 for (;;) 89 { 90 if ( code >= 256 ) 91 break; 92 93 result = cmap->gids[code]; 94 if ( result != 0 ) 95 { 96 *pchar_code = code; 97 break; 98 } 99 100 code++; 101 } 102 } 103 return result; 104 } 105 106 107 FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec, 108 sizeof ( CFF_CMapStdRec ), 109 110 (FT_CMap_InitFunc) cff_cmap_encoding_init, 111 (FT_CMap_DoneFunc) cff_cmap_encoding_done, 112 (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, 113 (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, 114 115 NULL, NULL, NULL, NULL, NULL 116 ) 117 118 119 /*************************************************************************/ 120 /*************************************************************************/ 121 /***** *****/ 122 /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ 123 /***** *****/ 124 /*************************************************************************/ 125 /*************************************************************************/ 126 127 FT_CALLBACK_DEF( const char* ) 128 cff_sid_to_glyph_name( TT_Face face, 129 FT_UInt idx ) 130 { 131 CFF_Font cff = (CFF_Font)face->extra.data; 132 CFF_Charset charset = &cff->charset; 133 FT_UInt sid = charset->sids[idx]; 134 135 136 return cff_index_get_sid_string( cff, sid ); 137 } 138 139 140 FT_CALLBACK_DEF( FT_Error ) 141 cff_cmap_unicode_init( PS_Unicodes unicodes, 142 FT_Pointer pointer ) 143 { 144 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 145 FT_Memory memory = FT_FACE_MEMORY( face ); 146 CFF_Font cff = (CFF_Font)face->extra.data; 147 CFF_Charset charset = &cff->charset; 148 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 149 150 FT_UNUSED( pointer ); 151 152 153 /* can't build Unicode map for CID-keyed font */ 154 /* because we don't know glyph names. */ 155 if ( !charset->sids ) 156 return FT_THROW( No_Unicode_Glyph_Name ); 157 158 return psnames->unicodes_init( memory, 159 unicodes, 160 cff->num_glyphs, 161 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, 162 (PS_FreeGlyphNameFunc)NULL, 163 (FT_Pointer)face ); 164 } 165 166 167 FT_CALLBACK_DEF( void ) 168 cff_cmap_unicode_done( PS_Unicodes unicodes ) 169 { 170 FT_Face face = FT_CMAP_FACE( unicodes ); 171 FT_Memory memory = FT_FACE_MEMORY( face ); 172 173 174 FT_FREE( unicodes->maps ); 175 unicodes->num_maps = 0; 176 } 177 178 179 FT_CALLBACK_DEF( FT_UInt ) 180 cff_cmap_unicode_char_index( PS_Unicodes unicodes, 181 FT_UInt32 char_code ) 182 { 183 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 184 CFF_Font cff = (CFF_Font)face->extra.data; 185 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 186 187 188 return psnames->unicodes_char_index( unicodes, char_code ); 189 } 190 191 192 FT_CALLBACK_DEF( FT_UInt32 ) 193 cff_cmap_unicode_char_next( PS_Unicodes unicodes, 194 FT_UInt32 *pchar_code ) 195 { 196 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 197 CFF_Font cff = (CFF_Font)face->extra.data; 198 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 199 200 201 return psnames->unicodes_char_next( unicodes, pchar_code ); 202 } 203 204 205 FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec, 206 sizeof ( PS_UnicodesRec ), 207 208 (FT_CMap_InitFunc) cff_cmap_unicode_init, 209 (FT_CMap_DoneFunc) cff_cmap_unicode_done, 210 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, 211 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, 212 213 NULL, NULL, NULL, NULL, NULL 214 ) 215 216 /* END */ 217
