1 /***************************************************************************/ 2 /* */ 3 /* cffcmap.c */ 4 /* */ 5 /* CFF character mapping table (cmap) support (body). */ 6 /* */ 7 /* Copyright 2002-2018 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( 108 cff_cmap_encoding_class_rec, 109 110 sizeof ( CFF_CMapStdRec ), 111 112 (FT_CMap_InitFunc) cff_cmap_encoding_init, /* init */ 113 (FT_CMap_DoneFunc) cff_cmap_encoding_done, /* done */ 114 (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, /* char_index */ 115 (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, /* char_next */ 116 117 (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */ 118 (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */ 119 (FT_CMap_VariantListFunc) NULL, /* variant_list */ 120 (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */ 121 (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */ 122 ) 123 124 125 /*************************************************************************/ 126 /*************************************************************************/ 127 /***** *****/ 128 /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ 129 /***** *****/ 130 /*************************************************************************/ 131 /*************************************************************************/ 132 133 FT_CALLBACK_DEF( const char* ) 134 cff_sid_to_glyph_name( TT_Face face, 135 FT_UInt idx ) 136 { 137 CFF_Font cff = (CFF_Font)face->extra.data; 138 CFF_Charset charset = &cff->charset; 139 FT_UInt sid = charset->sids[idx]; 140 141 142 return cff_index_get_sid_string( cff, sid ); 143 } 144 145 146 FT_CALLBACK_DEF( FT_Error ) 147 cff_cmap_unicode_init( PS_Unicodes unicodes, 148 FT_Pointer pointer ) 149 { 150 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 151 FT_Memory memory = FT_FACE_MEMORY( face ); 152 CFF_Font cff = (CFF_Font)face->extra.data; 153 CFF_Charset charset = &cff->charset; 154 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 155 156 FT_UNUSED( pointer ); 157 158 159 /* can't build Unicode map for CID-keyed font */ 160 /* because we don't know glyph names. */ 161 if ( !charset->sids ) 162 return FT_THROW( No_Unicode_Glyph_Name ); 163 164 return psnames->unicodes_init( memory, 165 unicodes, 166 cff->num_glyphs, 167 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, 168 (PS_FreeGlyphNameFunc)NULL, 169 (FT_Pointer)face ); 170 } 171 172 173 FT_CALLBACK_DEF( void ) 174 cff_cmap_unicode_done( PS_Unicodes unicodes ) 175 { 176 FT_Face face = FT_CMAP_FACE( unicodes ); 177 FT_Memory memory = FT_FACE_MEMORY( face ); 178 179 180 FT_FREE( unicodes->maps ); 181 unicodes->num_maps = 0; 182 } 183 184 185 FT_CALLBACK_DEF( FT_UInt ) 186 cff_cmap_unicode_char_index( PS_Unicodes unicodes, 187 FT_UInt32 char_code ) 188 { 189 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 190 CFF_Font cff = (CFF_Font)face->extra.data; 191 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 192 193 194 return psnames->unicodes_char_index( unicodes, char_code ); 195 } 196 197 198 FT_CALLBACK_DEF( FT_UInt32 ) 199 cff_cmap_unicode_char_next( PS_Unicodes unicodes, 200 FT_UInt32 *pchar_code ) 201 { 202 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 203 CFF_Font cff = (CFF_Font)face->extra.data; 204 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 205 206 207 return psnames->unicodes_char_next( unicodes, pchar_code ); 208 } 209 210 211 FT_DEFINE_CMAP_CLASS( 212 cff_cmap_unicode_class_rec, 213 214 sizeof ( PS_UnicodesRec ), 215 216 (FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */ 217 (FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */ 218 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */ 219 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */ 220 221 (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */ 222 (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */ 223 (FT_CMap_VariantListFunc) NULL, /* variant_list */ 224 (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */ 225 (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */ 226 ) 227 228 229 /* END */ 230
