1 /***************************************************************************/ 2 /* */ 3 /* cffcmap.c */ 4 /* */ 5 /* CFF character mapping table (cmap) support (body). */ 6 /* */ 7 /* Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2010 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 "cffcmap.h" 20 #include "cffload.h" 21 22 #include "cfferrs.h" 23 24 25 /*************************************************************************/ 26 /*************************************************************************/ 27 /***** *****/ 28 /***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/ 29 /***** *****/ 30 /*************************************************************************/ 31 /*************************************************************************/ 32 33 FT_CALLBACK_DEF( FT_Error ) 34 cff_cmap_encoding_init( CFF_CMapStd cmap ) 35 { 36 TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); 37 CFF_Font cff = (CFF_Font)face->extra.data; 38 CFF_Encoding encoding = &cff->encoding; 39 40 41 cmap->gids = encoding->codes; 42 43 return 0; 44 } 45 46 47 FT_CALLBACK_DEF( void ) 48 cff_cmap_encoding_done( CFF_CMapStd cmap ) 49 { 50 cmap->gids = NULL; 51 } 52 53 54 FT_CALLBACK_DEF( FT_UInt ) 55 cff_cmap_encoding_char_index( CFF_CMapStd cmap, 56 FT_UInt32 char_code ) 57 { 58 FT_UInt result = 0; 59 60 61 if ( char_code < 256 ) 62 result = cmap->gids[char_code]; 63 64 return result; 65 } 66 67 68 FT_CALLBACK_DEF( FT_UInt32 ) 69 cff_cmap_encoding_char_next( CFF_CMapStd cmap, 70 FT_UInt32 *pchar_code ) 71 { 72 FT_UInt result = 0; 73 FT_UInt32 char_code = *pchar_code; 74 75 76 *pchar_code = 0; 77 78 if ( char_code < 255 ) 79 { 80 FT_UInt code = (FT_UInt)(char_code + 1); 81 82 83 for (;;) 84 { 85 if ( code >= 256 ) 86 break; 87 88 result = cmap->gids[code]; 89 if ( result != 0 ) 90 { 91 *pchar_code = code; 92 break; 93 } 94 95 code++; 96 } 97 } 98 return result; 99 } 100 101 102 FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec, 103 sizeof ( CFF_CMapStdRec ), 104 105 (FT_CMap_InitFunc) cff_cmap_encoding_init, 106 (FT_CMap_DoneFunc) cff_cmap_encoding_done, 107 (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, 108 (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, 109 110 NULL, NULL, NULL, NULL, NULL 111 ) 112 113 114 /*************************************************************************/ 115 /*************************************************************************/ 116 /***** *****/ 117 /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ 118 /***** *****/ 119 /*************************************************************************/ 120 /*************************************************************************/ 121 122 FT_CALLBACK_DEF( const char* ) 123 cff_sid_to_glyph_name( TT_Face face, 124 FT_UInt idx ) 125 { 126 CFF_Font cff = (CFF_Font)face->extra.data; 127 CFF_Charset charset = &cff->charset; 128 FT_UInt sid = charset->sids[idx]; 129 130 131 return cff_index_get_sid_string( cff, sid ); 132 } 133 134 135 FT_CALLBACK_DEF( FT_Error ) 136 cff_cmap_unicode_init( PS_Unicodes unicodes ) 137 { 138 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 139 FT_Memory memory = FT_FACE_MEMORY( face ); 140 CFF_Font cff = (CFF_Font)face->extra.data; 141 CFF_Charset charset = &cff->charset; 142 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 143 144 145 /* can't build Unicode map for CID-keyed font */ 146 /* because we don't know glyph names. */ 147 if ( !charset->sids ) 148 return CFF_Err_No_Unicode_Glyph_Name; 149 150 return psnames->unicodes_init( memory, 151 unicodes, 152 cff->num_glyphs, 153 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, 154 (PS_FreeGlyphNameFunc)NULL, 155 (FT_Pointer)face ); 156 } 157 158 159 FT_CALLBACK_DEF( void ) 160 cff_cmap_unicode_done( PS_Unicodes unicodes ) 161 { 162 FT_Face face = FT_CMAP_FACE( unicodes ); 163 FT_Memory memory = FT_FACE_MEMORY( face ); 164 165 166 FT_FREE( unicodes->maps ); 167 unicodes->num_maps = 0; 168 } 169 170 171 FT_CALLBACK_DEF( FT_UInt ) 172 cff_cmap_unicode_char_index( PS_Unicodes unicodes, 173 FT_UInt32 char_code ) 174 { 175 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 176 CFF_Font cff = (CFF_Font)face->extra.data; 177 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 178 179 180 return psnames->unicodes_char_index( unicodes, char_code ); 181 } 182 183 184 FT_CALLBACK_DEF( FT_UInt32 ) 185 cff_cmap_unicode_char_next( PS_Unicodes unicodes, 186 FT_UInt32 *pchar_code ) 187 { 188 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 189 CFF_Font cff = (CFF_Font)face->extra.data; 190 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 191 192 193 return psnames->unicodes_char_next( unicodes, pchar_code ); 194 } 195 196 197 FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec, 198 sizeof ( PS_UnicodesRec ), 199 200 (FT_CMap_InitFunc) cff_cmap_unicode_init, 201 (FT_CMap_DoneFunc) cff_cmap_unicode_done, 202 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, 203 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, 204 205 NULL, NULL, NULL, NULL, NULL 206 ) 207 208 /* END */ 209
