1 /**************************************************************************** 2 * 3 * cffcmap.c 4 * 5 * CFF character mapping table (cmap) support (body). 6 * 7 * Copyright (C) 2002-2019 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 ) cff_cmap_encoding_init(CFF_CMapStd cmap,FT_Pointer pointer)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 ) cff_cmap_encoding_done(CFF_CMapStd cmap)53 cff_cmap_encoding_done( CFF_CMapStd cmap ) 54 { 55 cmap->gids = NULL; 56 } 57 58 59 FT_CALLBACK_DEF( FT_UInt ) cff_cmap_encoding_char_index(CFF_CMapStd cmap,FT_UInt32 char_code)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 ) cff_cmap_encoding_char_next(CFF_CMapStd cmap,FT_UInt32 * pchar_code)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 FT_CALLBACK_DEF(const char *)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 ) cff_cmap_unicode_init(PS_Unicodes unicodes,FT_Pointer pointer)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 if ( !psnames->unicodes_init ) 165 return FT_THROW( Unimplemented_Feature ); 166 167 return psnames->unicodes_init( memory, 168 unicodes, 169 cff->num_glyphs, 170 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, 171 (PS_FreeGlyphNameFunc)NULL, 172 (FT_Pointer)face ); 173 } 174 175 176 FT_CALLBACK_DEF( void ) cff_cmap_unicode_done(PS_Unicodes unicodes)177 cff_cmap_unicode_done( PS_Unicodes unicodes ) 178 { 179 FT_Face face = FT_CMAP_FACE( unicodes ); 180 FT_Memory memory = FT_FACE_MEMORY( face ); 181 182 183 FT_FREE( unicodes->maps ); 184 unicodes->num_maps = 0; 185 } 186 187 188 FT_CALLBACK_DEF( FT_UInt ) cff_cmap_unicode_char_index(PS_Unicodes unicodes,FT_UInt32 char_code)189 cff_cmap_unicode_char_index( PS_Unicodes unicodes, 190 FT_UInt32 char_code ) 191 { 192 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 193 CFF_Font cff = (CFF_Font)face->extra.data; 194 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 195 196 197 return psnames->unicodes_char_index( unicodes, char_code ); 198 } 199 200 201 FT_CALLBACK_DEF( FT_UInt32 ) cff_cmap_unicode_char_next(PS_Unicodes unicodes,FT_UInt32 * pchar_code)202 cff_cmap_unicode_char_next( PS_Unicodes unicodes, 203 FT_UInt32 *pchar_code ) 204 { 205 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); 206 CFF_Font cff = (CFF_Font)face->extra.data; 207 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; 208 209 210 return psnames->unicodes_char_next( unicodes, pchar_code ); 211 } 212 213 214 FT_DEFINE_CMAP_CLASS( 215 cff_cmap_unicode_class_rec, 216 217 sizeof ( PS_UnicodesRec ), 218 219 (FT_CMap_InitFunc) cff_cmap_unicode_init, /* init */ 220 (FT_CMap_DoneFunc) cff_cmap_unicode_done, /* done */ 221 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, /* char_index */ 222 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, /* char_next */ 223 224 (FT_CMap_CharVarIndexFunc) NULL, /* char_var_index */ 225 (FT_CMap_CharVarIsDefaultFunc)NULL, /* char_var_default */ 226 (FT_CMap_VariantListFunc) NULL, /* variant_list */ 227 (FT_CMap_CharVariantListFunc) NULL, /* charvariant_list */ 228 (FT_CMap_VariantCharListFunc) NULL /* variantchar_list */ 229 ) 230 231 232 /* END */ 233