1 /***************************************************************************/ |
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2 /* */ |
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3 /* cffcmap.c */ |
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4 /* */ |
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5 /* CFF character mapping table (cmap) support (body). */ |
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6 /* */ |
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7 /* Copyright 2002, 2003, 2004, 2005, 2006, 2007, 2010 by */ |
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8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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9 /* */ |
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10 /* This file is part of the FreeType project, and may only be used, */ |
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11 /* modified, and distributed under the terms of the FreeType project */ |
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12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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13 /* this file you indicate that you have read the license and */ |
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14 /* understand and accept it fully. */ |
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15 /* */ |
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16 /***************************************************************************/ |
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17 |
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18 |
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19 #include "cffcmap.h" |
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20 #include "cffload.h" |
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21 |
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22 #include "cfferrs.h" |
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23 |
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24 |
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25 /*************************************************************************/ |
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26 /*************************************************************************/ |
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27 /***** *****/ |
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28 /***** CFF STANDARD (AND EXPERT) ENCODING CMAPS *****/ |
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29 /***** *****/ |
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30 /*************************************************************************/ |
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31 /*************************************************************************/ |
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32 |
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33 FT_CALLBACK_DEF( FT_Error ) |
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34 cff_cmap_encoding_init( CFF_CMapStd cmap ) |
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35 { |
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36 TT_Face face = (TT_Face)FT_CMAP_FACE( cmap ); |
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37 CFF_Font cff = (CFF_Font)face->extra.data; |
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38 CFF_Encoding encoding = &cff->encoding; |
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39 |
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40 |
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41 cmap->gids = encoding->codes; |
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42 |
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43 return 0; |
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44 } |
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45 |
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46 |
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47 FT_CALLBACK_DEF( void ) |
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48 cff_cmap_encoding_done( CFF_CMapStd cmap ) |
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49 { |
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50 cmap->gids = NULL; |
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51 } |
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52 |
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53 |
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54 FT_CALLBACK_DEF( FT_UInt ) |
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55 cff_cmap_encoding_char_index( CFF_CMapStd cmap, |
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56 FT_UInt32 char_code ) |
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57 { |
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58 FT_UInt result = 0; |
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59 |
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60 |
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61 if ( char_code < 256 ) |
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62 result = cmap->gids[char_code]; |
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63 |
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64 return result; |
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65 } |
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66 |
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67 |
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68 FT_CALLBACK_DEF( FT_UInt32 ) |
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69 cff_cmap_encoding_char_next( CFF_CMapStd cmap, |
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70 FT_UInt32 *pchar_code ) |
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71 { |
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72 FT_UInt result = 0; |
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73 FT_UInt32 char_code = *pchar_code; |
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74 |
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75 |
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76 *pchar_code = 0; |
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77 |
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78 if ( char_code < 255 ) |
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79 { |
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80 FT_UInt code = (FT_UInt)(char_code + 1); |
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81 |
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82 |
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83 for (;;) |
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84 { |
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85 if ( code >= 256 ) |
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86 break; |
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87 |
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88 result = cmap->gids[code]; |
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89 if ( result != 0 ) |
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90 { |
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91 *pchar_code = code; |
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92 break; |
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93 } |
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94 |
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95 code++; |
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96 } |
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97 } |
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98 return result; |
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99 } |
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100 |
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101 |
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102 FT_DEFINE_CMAP_CLASS(cff_cmap_encoding_class_rec, |
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103 sizeof ( CFF_CMapStdRec ), |
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104 |
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105 (FT_CMap_InitFunc) cff_cmap_encoding_init, |
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106 (FT_CMap_DoneFunc) cff_cmap_encoding_done, |
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107 (FT_CMap_CharIndexFunc)cff_cmap_encoding_char_index, |
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108 (FT_CMap_CharNextFunc) cff_cmap_encoding_char_next, |
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109 |
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110 NULL, NULL, NULL, NULL, NULL |
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111 ) |
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112 |
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113 |
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114 /*************************************************************************/ |
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115 /*************************************************************************/ |
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116 /***** *****/ |
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117 /***** CFF SYNTHETIC UNICODE ENCODING CMAP *****/ |
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118 /***** *****/ |
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119 /*************************************************************************/ |
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120 /*************************************************************************/ |
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121 |
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122 FT_CALLBACK_DEF( const char* ) |
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123 cff_sid_to_glyph_name( TT_Face face, |
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124 FT_UInt idx ) |
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125 { |
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126 CFF_Font cff = (CFF_Font)face->extra.data; |
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127 CFF_Charset charset = &cff->charset; |
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128 FT_UInt sid = charset->sids[idx]; |
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129 |
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130 |
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131 return cff_index_get_sid_string( cff, sid ); |
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132 } |
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133 |
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134 |
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135 FT_CALLBACK_DEF( FT_Error ) |
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136 cff_cmap_unicode_init( PS_Unicodes unicodes ) |
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137 { |
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138 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
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139 FT_Memory memory = FT_FACE_MEMORY( face ); |
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140 CFF_Font cff = (CFF_Font)face->extra.data; |
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141 CFF_Charset charset = &cff->charset; |
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142 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
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143 |
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144 |
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145 /* can't build Unicode map for CID-keyed font */ |
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146 /* because we don't know glyph names. */ |
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147 if ( !charset->sids ) |
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148 return CFF_Err_No_Unicode_Glyph_Name; |
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149 |
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150 return psnames->unicodes_init( memory, |
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151 unicodes, |
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152 cff->num_glyphs, |
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153 (PS_GetGlyphNameFunc)&cff_sid_to_glyph_name, |
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154 (PS_FreeGlyphNameFunc)NULL, |
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155 (FT_Pointer)face ); |
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156 } |
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157 |
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158 |
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159 FT_CALLBACK_DEF( void ) |
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160 cff_cmap_unicode_done( PS_Unicodes unicodes ) |
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161 { |
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162 FT_Face face = FT_CMAP_FACE( unicodes ); |
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163 FT_Memory memory = FT_FACE_MEMORY( face ); |
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164 |
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165 |
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166 FT_FREE( unicodes->maps ); |
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167 unicodes->num_maps = 0; |
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168 } |
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169 |
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170 |
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171 FT_CALLBACK_DEF( FT_UInt ) |
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172 cff_cmap_unicode_char_index( PS_Unicodes unicodes, |
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173 FT_UInt32 char_code ) |
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174 { |
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175 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
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176 CFF_Font cff = (CFF_Font)face->extra.data; |
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177 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
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178 |
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179 |
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180 return psnames->unicodes_char_index( unicodes, char_code ); |
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181 } |
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182 |
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183 |
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184 FT_CALLBACK_DEF( FT_UInt32 ) |
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185 cff_cmap_unicode_char_next( PS_Unicodes unicodes, |
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186 FT_UInt32 *pchar_code ) |
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187 { |
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188 TT_Face face = (TT_Face)FT_CMAP_FACE( unicodes ); |
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189 CFF_Font cff = (CFF_Font)face->extra.data; |
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190 FT_Service_PsCMaps psnames = (FT_Service_PsCMaps)cff->psnames; |
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191 |
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192 |
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193 return psnames->unicodes_char_next( unicodes, pchar_code ); |
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194 } |
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195 |
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196 |
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197 FT_DEFINE_CMAP_CLASS(cff_cmap_unicode_class_rec, |
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198 sizeof ( PS_UnicodesRec ), |
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199 |
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200 (FT_CMap_InitFunc) cff_cmap_unicode_init, |
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201 (FT_CMap_DoneFunc) cff_cmap_unicode_done, |
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202 (FT_CMap_CharIndexFunc)cff_cmap_unicode_char_index, |
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203 (FT_CMap_CharNextFunc) cff_cmap_unicode_char_next, |
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204 |
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205 NULL, NULL, NULL, NULL, NULL |
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206 ) |
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207 |
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208 /* END */ |
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