1 /***************************************************************************/ |
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2 /* */ |
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3 /* cffdrivr.c */ |
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4 /* */ |
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5 /* OpenType font driver implementation (body). */ |
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6 /* */ |
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7 /* Copyright 1996-2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, */ |
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8 /* 2010 by */ |
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9 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ |
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10 /* */ |
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11 /* This file is part of the FreeType project, and may only be used, */ |
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12 /* modified, and distributed under the terms of the FreeType project */ |
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13 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ |
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14 /* this file you indicate that you have read the license and */ |
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15 /* understand and accept it fully. */ |
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16 /* */ |
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17 /***************************************************************************/ |
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18 |
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19 |
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20 #include <ft2build.h> |
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21 #include FT_FREETYPE_H |
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22 #include FT_INTERNAL_DEBUG_H |
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23 #include FT_INTERNAL_STREAM_H |
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24 #include FT_INTERNAL_SFNT_H |
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25 #include FT_SERVICE_CID_H |
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26 #include FT_SERVICE_POSTSCRIPT_INFO_H |
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27 #include FT_SERVICE_POSTSCRIPT_NAME_H |
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28 #include FT_SERVICE_TT_CMAP_H |
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29 |
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30 #include "cffdrivr.h" |
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31 #include "cffgload.h" |
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32 #include "cffload.h" |
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33 #include "cffcmap.h" |
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34 #include "cffparse.h" |
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35 |
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36 #include "cfferrs.h" |
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37 #include "cffpic.h" |
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38 |
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39 #include FT_SERVICE_XFREE86_NAME_H |
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40 #include FT_SERVICE_GLYPH_DICT_H |
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41 |
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42 |
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43 /*************************************************************************/ |
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44 /* */ |
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45 /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
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46 /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
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47 /* messages during execution. */ |
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48 /* */ |
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49 #undef FT_COMPONENT |
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50 #define FT_COMPONENT trace_cffdriver |
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51 |
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52 |
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53 /*************************************************************************/ |
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54 /*************************************************************************/ |
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55 /*************************************************************************/ |
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56 /**** ****/ |
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57 /**** ****/ |
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58 /**** F A C E S ****/ |
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59 /**** ****/ |
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60 /**** ****/ |
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61 /*************************************************************************/ |
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62 /*************************************************************************/ |
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63 /*************************************************************************/ |
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64 |
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65 |
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66 #undef PAIR_TAG |
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67 #define PAIR_TAG( left, right ) ( ( (FT_ULong)left << 16 ) | \ |
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68 (FT_ULong)right ) |
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69 |
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70 |
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71 /*************************************************************************/ |
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72 /* */ |
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73 /* <Function> */ |
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74 /* cff_get_kerning */ |
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75 /* */ |
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76 /* <Description> */ |
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77 /* A driver method used to return the kerning vector between two */ |
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78 /* glyphs of the same face. */ |
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79 /* */ |
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80 /* <Input> */ |
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81 /* face :: A handle to the source face object. */ |
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82 /* */ |
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83 /* left_glyph :: The index of the left glyph in the kern pair. */ |
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84 /* */ |
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85 /* right_glyph :: The index of the right glyph in the kern pair. */ |
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86 /* */ |
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87 /* <Output> */ |
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88 /* kerning :: The kerning vector. This is in font units for */ |
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89 /* scalable formats, and in pixels for fixed-sizes */ |
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90 /* formats. */ |
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91 /* */ |
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92 /* <Return> */ |
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93 /* FreeType error code. 0 means success. */ |
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94 /* */ |
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95 /* <Note> */ |
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96 /* Only horizontal layouts (left-to-right & right-to-left) are */ |
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97 /* supported by this function. Other layouts, or more sophisticated */ |
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98 /* kernings, are out of scope of this method (the basic driver */ |
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99 /* interface is meant to be simple). */ |
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100 /* */ |
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101 /* They can be implemented by format-specific interfaces. */ |
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102 /* */ |
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103 FT_CALLBACK_DEF( FT_Error ) |
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104 cff_get_kerning( FT_Face ttface, /* TT_Face */ |
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105 FT_UInt left_glyph, |
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106 FT_UInt right_glyph, |
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107 FT_Vector* kerning ) |
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108 { |
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109 TT_Face face = (TT_Face)ttface; |
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110 SFNT_Service sfnt = (SFNT_Service)face->sfnt; |
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111 |
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112 |
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113 kerning->x = 0; |
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114 kerning->y = 0; |
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115 |
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116 if ( sfnt ) |
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117 kerning->x = sfnt->get_kerning( face, left_glyph, right_glyph ); |
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118 |
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119 return CFF_Err_Ok; |
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120 } |
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121 |
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122 |
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123 #undef PAIR_TAG |
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124 |
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125 |
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126 /*************************************************************************/ |
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127 /* */ |
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128 /* <Function> */ |
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129 /* Load_Glyph */ |
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130 /* */ |
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131 /* <Description> */ |
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132 /* A driver method used to load a glyph within a given glyph slot. */ |
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133 /* */ |
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134 /* <Input> */ |
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135 /* slot :: A handle to the target slot object where the glyph */ |
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136 /* will be loaded. */ |
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137 /* */ |
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138 /* size :: A handle to the source face size at which the glyph */ |
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139 /* must be scaled, loaded, etc. */ |
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140 /* */ |
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141 /* glyph_index :: The index of the glyph in the font file. */ |
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142 /* */ |
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143 /* load_flags :: A flag indicating what to load for this glyph. The */ |
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144 /* FT_LOAD_??? constants can be used to control the */ |
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145 /* glyph loading process (e.g., whether the outline */ |
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146 /* should be scaled, whether to load bitmaps or not, */ |
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147 /* whether to hint the outline, etc). */ |
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148 /* */ |
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149 /* <Return> */ |
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150 /* FreeType error code. 0 means success. */ |
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151 /* */ |
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152 FT_CALLBACK_DEF( FT_Error ) |
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153 Load_Glyph( FT_GlyphSlot cffslot, /* CFF_GlyphSlot */ |
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154 FT_Size cffsize, /* CFF_Size */ |
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155 FT_UInt glyph_index, |
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156 FT_Int32 load_flags ) |
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157 { |
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158 FT_Error error; |
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159 CFF_GlyphSlot slot = (CFF_GlyphSlot)cffslot; |
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160 CFF_Size size = (CFF_Size)cffsize; |
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161 |
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162 |
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163 if ( !slot ) |
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164 return CFF_Err_Invalid_Slot_Handle; |
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165 |
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166 /* check whether we want a scaled outline or bitmap */ |
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167 if ( !size ) |
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168 load_flags |= FT_LOAD_NO_SCALE | FT_LOAD_NO_HINTING; |
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169 |
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170 /* reset the size object if necessary */ |
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171 if ( load_flags & FT_LOAD_NO_SCALE ) |
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172 size = NULL; |
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173 |
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174 if ( size ) |
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175 { |
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176 /* these two objects must have the same parent */ |
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177 if ( cffsize->face != cffslot->face ) |
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178 return CFF_Err_Invalid_Face_Handle; |
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179 } |
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180 |
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181 /* now load the glyph outline if necessary */ |
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182 error = cff_slot_load( slot, size, glyph_index, load_flags ); |
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183 |
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184 /* force drop-out mode to 2 - irrelevant now */ |
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185 /* slot->outline.dropout_mode = 2; */ |
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186 |
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187 return error; |
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188 } |
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189 |
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190 |
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191 FT_CALLBACK_DEF( FT_Error ) |
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192 cff_get_advances( FT_Face face, |
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193 FT_UInt start, |
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194 FT_UInt count, |
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195 FT_Int32 flags, |
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196 FT_Fixed* advances ) |
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197 { |
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198 FT_UInt nn; |
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199 FT_Error error = CFF_Err_Ok; |
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200 FT_GlyphSlot slot = face->glyph; |
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201 |
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202 |
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203 flags |= (FT_UInt32)FT_LOAD_ADVANCE_ONLY; |
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204 |
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205 for ( nn = 0; nn < count; nn++ ) |
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206 { |
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207 error = Load_Glyph( slot, face->size, start + nn, flags ); |
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208 if ( error ) |
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209 break; |
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210 |
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211 advances[nn] = ( flags & FT_LOAD_VERTICAL_LAYOUT ) |
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212 ? slot->linearVertAdvance |
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213 : slot->linearHoriAdvance; |
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214 } |
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215 |
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216 return error; |
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217 } |
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218 |
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219 |
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220 /* |
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221 * GLYPH DICT SERVICE |
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222 * |
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223 */ |
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224 |
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225 static FT_Error |
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226 cff_get_glyph_name( CFF_Face face, |
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227 FT_UInt glyph_index, |
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228 FT_Pointer buffer, |
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229 FT_UInt buffer_max ) |
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230 { |
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231 CFF_Font font = (CFF_Font)face->extra.data; |
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232 FT_String* gname; |
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233 FT_UShort sid; |
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234 FT_Error error; |
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235 |
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236 |
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237 if ( !font->psnames ) |
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238 { |
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239 FT_ERROR(( "cff_get_glyph_name:" |
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240 " cannot get glyph name from CFF & CEF fonts\n" |
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241 " " |
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242 " without the `PSNames' module\n" )); |
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243 error = CFF_Err_Unknown_File_Format; |
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244 goto Exit; |
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245 } |
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246 |
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247 /* first, locate the sid in the charset table */ |
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248 sid = font->charset.sids[glyph_index]; |
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249 |
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250 /* now, lookup the name itself */ |
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251 gname = cff_index_get_sid_string( font, sid ); |
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252 |
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253 if ( gname ) |
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254 FT_STRCPYN( buffer, gname, buffer_max ); |
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255 |
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256 error = CFF_Err_Ok; |
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257 |
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258 Exit: |
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259 return error; |
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260 } |
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261 |
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262 |
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263 static FT_UInt |
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264 cff_get_name_index( CFF_Face face, |
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265 FT_String* glyph_name ) |
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266 { |
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267 CFF_Font cff; |
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268 CFF_Charset charset; |
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269 FT_Service_PsCMaps psnames; |
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270 FT_String* name; |
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271 FT_UShort sid; |
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272 FT_UInt i; |
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273 |
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274 |
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275 cff = (CFF_FontRec *)face->extra.data; |
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276 charset = &cff->charset; |
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277 |
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278 FT_FACE_FIND_GLOBAL_SERVICE( face, psnames, POSTSCRIPT_CMAPS ); |
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279 if ( !psnames ) |
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280 return 0; |
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281 |
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282 for ( i = 0; i < cff->num_glyphs; i++ ) |
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283 { |
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284 sid = charset->sids[i]; |
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285 |
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286 if ( sid > 390 ) |
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287 name = cff_index_get_string( cff, sid - 391 ); |
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288 else |
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289 name = (FT_String *)psnames->adobe_std_strings( sid ); |
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290 |
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291 if ( !name ) |
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292 continue; |
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293 |
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294 if ( !ft_strcmp( glyph_name, name ) ) |
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295 return i; |
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296 } |
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297 |
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298 return 0; |
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299 } |
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300 |
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301 |
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302 FT_DEFINE_SERVICE_GLYPHDICTREC(cff_service_glyph_dict, |
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303 (FT_GlyphDict_GetNameFunc) cff_get_glyph_name, |
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304 (FT_GlyphDict_NameIndexFunc)cff_get_name_index |
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305 ) |
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306 |
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307 |
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308 /* |
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309 * POSTSCRIPT INFO SERVICE |
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310 * |
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311 */ |
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312 |
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313 static FT_Int |
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314 cff_ps_has_glyph_names( FT_Face face ) |
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315 { |
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316 return ( face->face_flags & FT_FACE_FLAG_GLYPH_NAMES ) > 0; |
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317 } |
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318 |
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319 |
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320 static FT_Error |
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321 cff_ps_get_font_info( CFF_Face face, |
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322 PS_FontInfoRec* afont_info ) |
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323 { |
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324 CFF_Font cff = (CFF_Font)face->extra.data; |
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325 FT_Error error = CFF_Err_Ok; |
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326 |
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327 |
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328 if ( cff && cff->font_info == NULL ) |
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329 { |
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330 CFF_FontRecDict dict = &cff->top_font.font_dict; |
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331 PS_FontInfoRec *font_info; |
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332 FT_Memory memory = face->root.memory; |
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333 |
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334 |
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335 if ( FT_ALLOC( font_info, sizeof ( *font_info ) ) ) |
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336 goto Fail; |
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337 |
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338 font_info->version = cff_index_get_sid_string( cff, |
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339 dict->version ); |
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340 font_info->notice = cff_index_get_sid_string( cff, |
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341 dict->notice ); |
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342 font_info->full_name = cff_index_get_sid_string( cff, |
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343 dict->full_name ); |
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344 font_info->family_name = cff_index_get_sid_string( cff, |
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345 dict->family_name ); |
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346 font_info->weight = cff_index_get_sid_string( cff, |
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347 dict->weight ); |
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348 font_info->italic_angle = dict->italic_angle; |
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349 font_info->is_fixed_pitch = dict->is_fixed_pitch; |
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350 font_info->underline_position = (FT_Short)dict->underline_position; |
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351 font_info->underline_thickness = (FT_Short)dict->underline_thickness; |
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352 |
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353 cff->font_info = font_info; |
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354 } |
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355 |
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356 if ( cff ) |
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357 *afont_info = *cff->font_info; |
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358 |
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359 Fail: |
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360 return error; |
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361 } |
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362 |
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363 |
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364 FT_DEFINE_SERVICE_PSINFOREC(cff_service_ps_info, |
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365 (PS_GetFontInfoFunc) cff_ps_get_font_info, |
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366 (PS_GetFontExtraFunc) NULL, |
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367 (PS_HasGlyphNamesFunc) cff_ps_has_glyph_names, |
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368 (PS_GetFontPrivateFunc)NULL /* unsupported with CFF fonts */ |
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369 ) |
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370 |
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371 |
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372 /* |
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373 * POSTSCRIPT NAME SERVICE |
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374 * |
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375 */ |
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376 |
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377 static const char* |
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378 cff_get_ps_name( CFF_Face face ) |
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379 { |
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380 CFF_Font cff = (CFF_Font)face->extra.data; |
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381 |
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382 |
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383 return (const char*)cff->font_name; |
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384 } |
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385 |
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386 |
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387 FT_DEFINE_SERVICE_PSFONTNAMEREC(cff_service_ps_name, |
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388 (FT_PsName_GetFunc)cff_get_ps_name |
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389 ) |
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390 |
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391 |
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392 /* |
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393 * TT CMAP INFO |
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394 * |
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395 * If the charmap is a synthetic Unicode encoding cmap or |
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396 * a Type 1 standard (or expert) encoding cmap, hide TT CMAP INFO |
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397 * service defined in SFNT module. |
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398 * |
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399 * Otherwise call the service function in the sfnt module. |
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400 * |
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401 */ |
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402 static FT_Error |
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403 cff_get_cmap_info( FT_CharMap charmap, |
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404 TT_CMapInfo *cmap_info ) |
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405 { |
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406 FT_CMap cmap = FT_CMAP( charmap ); |
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407 FT_Error error = CFF_Err_Ok; |
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408 FT_Face face = FT_CMAP_FACE( cmap ); |
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409 FT_Library library = FT_FACE_LIBRARY( face ); |
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410 |
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411 |
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412 cmap_info->language = 0; |
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413 cmap_info->format = 0; |
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414 |
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415 if ( cmap->clazz != &FT_CFF_CMAP_ENCODING_CLASS_REC_GET && |
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416 cmap->clazz != &FT_CFF_CMAP_UNICODE_CLASS_REC_GET ) |
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417 { |
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418 FT_Module sfnt = FT_Get_Module( library, "sfnt" ); |
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419 FT_Service_TTCMaps service = |
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420 (FT_Service_TTCMaps)ft_module_get_service( sfnt, |
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421 FT_SERVICE_ID_TT_CMAP ); |
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422 |
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423 |
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424 if ( service && service->get_cmap_info ) |
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425 error = service->get_cmap_info( charmap, cmap_info ); |
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426 } |
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427 |
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428 return error; |
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429 } |
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430 |
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431 |
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432 FT_DEFINE_SERVICE_TTCMAPSREC(cff_service_get_cmap_info, |
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433 (TT_CMap_Info_GetFunc)cff_get_cmap_info |
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434 ) |
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435 |
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436 |
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437 /* |
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438 * CID INFO SERVICE |
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439 * |
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440 */ |
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441 static FT_Error |
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442 cff_get_ros( CFF_Face face, |
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443 const char* *registry, |
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444 const char* *ordering, |
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445 FT_Int *supplement ) |
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446 { |
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447 FT_Error error = CFF_Err_Ok; |
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448 CFF_Font cff = (CFF_Font)face->extra.data; |
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449 |
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450 |
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451 if ( cff ) |
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452 { |
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453 CFF_FontRecDict dict = &cff->top_font.font_dict; |
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454 |
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455 |
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456 if ( dict->cid_registry == 0xFFFFU ) |
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457 { |
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458 error = CFF_Err_Invalid_Argument; |
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459 goto Fail; |
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460 } |
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461 |
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462 if ( registry ) |
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463 { |
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464 if ( cff->registry == NULL ) |
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465 cff->registry = cff_index_get_sid_string( cff, |
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466 dict->cid_registry ); |
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467 *registry = cff->registry; |
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468 } |
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469 |
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470 if ( ordering ) |
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471 { |
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472 if ( cff->ordering == NULL ) |
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473 cff->ordering = cff_index_get_sid_string( cff, |
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474 dict->cid_ordering ); |
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475 *ordering = cff->ordering; |
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476 } |
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477 |
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478 /* |
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479 * XXX: According to Adobe TechNote #5176, the supplement in CFF |
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480 * can be a real number. We truncate it to fit public API |
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481 * since freetype-2.3.6. |
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482 */ |
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483 if ( supplement ) |
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484 { |
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485 if ( dict->cid_supplement < FT_INT_MIN || |
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486 dict->cid_supplement > FT_INT_MAX ) |
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487 FT_TRACE1(( "cff_get_ros: too large supplement %d is truncated\n", |
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488 dict->cid_supplement )); |
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489 *supplement = (FT_Int)dict->cid_supplement; |
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490 } |
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491 } |
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492 |
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493 Fail: |
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494 return error; |
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495 } |
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496 |
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497 |
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498 static FT_Error |
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499 cff_get_is_cid( CFF_Face face, |
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500 FT_Bool *is_cid ) |
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501 { |
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502 FT_Error error = CFF_Err_Ok; |
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503 CFF_Font cff = (CFF_Font)face->extra.data; |
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504 |
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505 |
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506 *is_cid = 0; |
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507 |
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508 if ( cff ) |
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509 { |
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510 CFF_FontRecDict dict = &cff->top_font.font_dict; |
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511 |
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512 |
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513 if ( dict->cid_registry != 0xFFFFU ) |
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514 *is_cid = 1; |
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515 } |
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516 |
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517 return error; |
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518 } |
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519 |
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520 |
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521 static FT_Error |
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522 cff_get_cid_from_glyph_index( CFF_Face face, |
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523 FT_UInt glyph_index, |
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524 FT_UInt *cid ) |
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525 { |
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526 FT_Error error = CFF_Err_Ok; |
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527 CFF_Font cff; |
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528 |
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529 |
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530 cff = (CFF_Font)face->extra.data; |
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531 |
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532 if ( cff ) |
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533 { |
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534 FT_UInt c; |
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535 CFF_FontRecDict dict = &cff->top_font.font_dict; |
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536 |
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537 |
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538 if ( dict->cid_registry == 0xFFFFU ) |
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539 { |
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540 error = CFF_Err_Invalid_Argument; |
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541 goto Fail; |
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542 } |
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543 |
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544 if ( glyph_index > cff->num_glyphs ) |
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545 { |
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546 error = CFF_Err_Invalid_Argument; |
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547 goto Fail; |
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548 } |
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549 |
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550 c = cff->charset.sids[glyph_index]; |
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551 |
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552 if ( cid ) |
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553 *cid = c; |
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554 } |
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555 |
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556 Fail: |
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557 return error; |
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558 } |
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559 |
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560 |
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561 FT_DEFINE_SERVICE_CIDREC(cff_service_cid_info, |
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562 (FT_CID_GetRegistryOrderingSupplementFunc)cff_get_ros, |
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563 (FT_CID_GetIsInternallyCIDKeyedFunc) cff_get_is_cid, |
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564 (FT_CID_GetCIDFromGlyphIndexFunc) cff_get_cid_from_glyph_index |
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565 ) |
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566 |
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567 |
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568 /*************************************************************************/ |
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569 /*************************************************************************/ |
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570 /*************************************************************************/ |
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571 /**** ****/ |
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572 /**** ****/ |
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573 /**** D R I V E R I N T E R F A C E ****/ |
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574 /**** ****/ |
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575 /**** ****/ |
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576 /*************************************************************************/ |
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577 /*************************************************************************/ |
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578 /*************************************************************************/ |
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579 #ifndef FT_CONFIG_OPTION_NO_GLYPH_NAMES |
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580 FT_DEFINE_SERVICEDESCREC6(cff_services, |
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581 FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF, |
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582 FT_SERVICE_ID_POSTSCRIPT_INFO, &FT_CFF_SERVICE_PS_INFO_GET, |
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583 FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_CFF_SERVICE_PS_NAME_GET, |
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584 FT_SERVICE_ID_GLYPH_DICT, &FT_CFF_SERVICE_GLYPH_DICT_GET, |
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585 FT_SERVICE_ID_TT_CMAP, &FT_CFF_SERVICE_GET_CMAP_INFO_GET, |
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586 FT_SERVICE_ID_CID, &FT_CFF_SERVICE_CID_INFO_GET |
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587 ) |
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588 #else |
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589 FT_DEFINE_SERVICEDESCREC5(cff_services, |
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590 FT_SERVICE_ID_XF86_NAME, FT_XF86_FORMAT_CFF, |
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591 FT_SERVICE_ID_POSTSCRIPT_INFO, &FT_CFF_SERVICE_PS_INFO_GET, |
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592 FT_SERVICE_ID_POSTSCRIPT_FONT_NAME, &FT_CFF_SERVICE_PS_NAME_GET, |
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593 FT_SERVICE_ID_TT_CMAP, &FT_CFF_SERVICE_GET_CMAP_INFO_GET, |
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594 FT_SERVICE_ID_CID, &FT_CFF_SERVICE_CID_INFO_GET |
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595 ) |
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596 #endif |
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597 |
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598 FT_CALLBACK_DEF( FT_Module_Interface ) |
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599 cff_get_interface( FT_Module driver, /* CFF_Driver */ |
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600 const char* module_interface ) |
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601 { |
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602 FT_Module sfnt; |
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603 FT_Module_Interface result; |
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604 |
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605 |
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606 result = ft_service_list_lookup( FT_CFF_SERVICES_GET, module_interface ); |
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607 if ( result != NULL ) |
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608 return result; |
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609 |
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610 if ( !driver ) |
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611 return NULL; |
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612 |
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613 /* we pass our request to the `sfnt' module */ |
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614 sfnt = FT_Get_Module( driver->library, "sfnt" ); |
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615 |
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616 return sfnt ? sfnt->clazz->get_interface( sfnt, module_interface ) : 0; |
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617 } |
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618 |
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619 |
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620 /* The FT_DriverInterface structure is defined in ftdriver.h. */ |
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621 |
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622 #ifdef TT_CONFIG_OPTION_EMBEDDED_BITMAPS |
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623 #define CFF_SIZE_SELECT cff_size_select |
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624 #else |
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625 #define CFF_SIZE_SELECT 0 |
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626 #endif |
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627 |
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628 FT_DEFINE_DRIVER(cff_driver_class, |
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629 FT_MODULE_FONT_DRIVER | |
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630 FT_MODULE_DRIVER_SCALABLE | |
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631 FT_MODULE_DRIVER_HAS_HINTER, |
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632 |
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633 sizeof( CFF_DriverRec ), |
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634 "cff", |
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635 0x10000L, |
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636 0x20000L, |
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637 |
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638 0, /* module-specific interface */ |
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639 |
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640 cff_driver_init, |
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641 cff_driver_done, |
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642 cff_get_interface, |
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643 |
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644 /* now the specific driver fields */ |
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645 sizeof( TT_FaceRec ), |
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646 sizeof( CFF_SizeRec ), |
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647 sizeof( CFF_GlyphSlotRec ), |
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648 |
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649 cff_face_init, |
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650 cff_face_done, |
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651 cff_size_init, |
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652 cff_size_done, |
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653 cff_slot_init, |
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654 cff_slot_done, |
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655 |
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656 ft_stub_set_char_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
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657 ft_stub_set_pixel_sizes, /* FT_CONFIG_OPTION_OLD_INTERNALS */ |
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658 |
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659 Load_Glyph, |
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660 |
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661 cff_get_kerning, |
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662 0, /* FT_Face_AttachFunc */ |
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663 cff_get_advances, /* FT_Face_GetAdvancesFunc */ |
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664 |
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665 cff_size_request, |
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666 |
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667 CFF_SIZE_SELECT |
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668 ) |
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669 |
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670 |
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671 /* END */ |
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