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1 /***************************************************************************/ |
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2 /* */ |
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3 /* pfrgload.c */ |
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4 /* */ |
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5 /* FreeType PFR glyph loader (body). */ |
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6 /* */ |
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7 /* Copyright 2002, 2003, 2005, 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 "pfrgload.h" |
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20 #include "pfrsbit.h" |
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21 #include "pfrload.h" /* for macro definitions */ |
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22 #include FT_INTERNAL_DEBUG_H |
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23 |
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24 #include "pfrerror.h" |
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25 |
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26 #undef FT_COMPONENT |
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27 #define FT_COMPONENT trace_pfr |
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28 |
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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 /***** PFR GLYPH BUILDER *****/ |
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34 /***** *****/ |
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35 /*************************************************************************/ |
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36 /*************************************************************************/ |
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37 |
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38 |
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39 FT_LOCAL_DEF( void ) |
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40 pfr_glyph_init( PFR_Glyph glyph, |
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41 FT_GlyphLoader loader ) |
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42 { |
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43 FT_ZERO( glyph ); |
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44 |
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45 glyph->loader = loader; |
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46 glyph->path_begun = 0; |
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47 |
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48 FT_GlyphLoader_Rewind( loader ); |
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49 } |
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50 |
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51 |
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52 FT_LOCAL_DEF( void ) |
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53 pfr_glyph_done( PFR_Glyph glyph ) |
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54 { |
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55 FT_Memory memory = glyph->loader->memory; |
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56 |
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57 |
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58 FT_FREE( glyph->x_control ); |
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59 glyph->y_control = NULL; |
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60 |
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61 glyph->max_xy_control = 0; |
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62 #if 0 |
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63 glyph->num_x_control = 0; |
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64 glyph->num_y_control = 0; |
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65 #endif |
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66 |
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67 FT_FREE( glyph->subs ); |
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68 |
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69 glyph->max_subs = 0; |
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70 glyph->num_subs = 0; |
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71 |
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72 glyph->loader = NULL; |
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73 glyph->path_begun = 0; |
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74 } |
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75 |
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76 |
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77 /* close current contour, if any */ |
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78 static void |
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79 pfr_glyph_close_contour( PFR_Glyph glyph ) |
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80 { |
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81 FT_GlyphLoader loader = glyph->loader; |
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82 FT_Outline* outline = &loader->current.outline; |
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83 FT_Int last, first; |
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84 |
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85 |
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86 if ( !glyph->path_begun ) |
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87 return; |
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88 |
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89 /* compute first and last point indices in current glyph outline */ |
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90 last = outline->n_points - 1; |
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91 first = 0; |
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92 if ( outline->n_contours > 0 ) |
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93 first = outline->contours[outline->n_contours - 1]; |
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94 |
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95 /* if the last point falls on the same location than the first one */ |
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96 /* we need to delete it */ |
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97 if ( last > first ) |
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98 { |
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99 FT_Vector* p1 = outline->points + first; |
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100 FT_Vector* p2 = outline->points + last; |
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101 |
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102 |
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103 if ( p1->x == p2->x && p1->y == p2->y ) |
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104 { |
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105 outline->n_points--; |
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106 last--; |
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107 } |
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108 } |
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109 |
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110 /* don't add empty contours */ |
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111 if ( last >= first ) |
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112 outline->contours[outline->n_contours++] = (short)last; |
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113 |
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114 glyph->path_begun = 0; |
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115 } |
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116 |
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117 |
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118 /* reset glyph to start the loading of a new glyph */ |
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119 static void |
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120 pfr_glyph_start( PFR_Glyph glyph ) |
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121 { |
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122 glyph->path_begun = 0; |
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123 } |
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124 |
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125 |
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126 static FT_Error |
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127 pfr_glyph_line_to( PFR_Glyph glyph, |
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128 FT_Vector* to ) |
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129 { |
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130 FT_GlyphLoader loader = glyph->loader; |
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131 FT_Outline* outline = &loader->current.outline; |
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132 FT_Error error; |
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133 |
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134 |
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135 /* check that we have begun a new path */ |
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136 if ( !glyph->path_begun ) |
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137 { |
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138 error = PFR_Err_Invalid_Table; |
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139 FT_ERROR(( "pfr_glyph_line_to: invalid glyph data\n" )); |
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140 goto Exit; |
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141 } |
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142 |
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143 error = FT_GLYPHLOADER_CHECK_POINTS( loader, 1, 0 ); |
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144 if ( !error ) |
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145 { |
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146 FT_UInt n = outline->n_points; |
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147 |
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148 |
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149 outline->points[n] = *to; |
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150 outline->tags [n] = FT_CURVE_TAG_ON; |
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151 |
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152 outline->n_points++; |
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153 } |
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154 |
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155 Exit: |
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156 return error; |
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157 } |
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158 |
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159 |
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160 static FT_Error |
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161 pfr_glyph_curve_to( PFR_Glyph glyph, |
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162 FT_Vector* control1, |
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163 FT_Vector* control2, |
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164 FT_Vector* to ) |
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165 { |
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166 FT_GlyphLoader loader = glyph->loader; |
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167 FT_Outline* outline = &loader->current.outline; |
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168 FT_Error error; |
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169 |
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170 |
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171 /* check that we have begun a new path */ |
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172 if ( !glyph->path_begun ) |
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173 { |
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174 error = PFR_Err_Invalid_Table; |
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175 FT_ERROR(( "pfr_glyph_line_to: invalid glyph data\n" )); |
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176 goto Exit; |
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177 } |
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178 |
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179 error = FT_GLYPHLOADER_CHECK_POINTS( loader, 3, 0 ); |
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180 if ( !error ) |
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181 { |
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182 FT_Vector* vec = outline->points + outline->n_points; |
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183 FT_Byte* tag = (FT_Byte*)outline->tags + outline->n_points; |
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184 |
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185 |
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186 vec[0] = *control1; |
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187 vec[1] = *control2; |
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188 vec[2] = *to; |
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189 tag[0] = FT_CURVE_TAG_CUBIC; |
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190 tag[1] = FT_CURVE_TAG_CUBIC; |
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191 tag[2] = FT_CURVE_TAG_ON; |
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192 |
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193 outline->n_points = (FT_Short)( outline->n_points + 3 ); |
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194 } |
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195 |
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196 Exit: |
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197 return error; |
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198 } |
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199 |
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200 |
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201 static FT_Error |
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202 pfr_glyph_move_to( PFR_Glyph glyph, |
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203 FT_Vector* to ) |
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204 { |
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205 FT_GlyphLoader loader = glyph->loader; |
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206 FT_Error error; |
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207 |
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208 |
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209 /* close current contour if any */ |
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210 pfr_glyph_close_contour( glyph ); |
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211 |
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212 /* indicate that a new contour has started */ |
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213 glyph->path_begun = 1; |
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214 |
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215 /* check that there is space for a new contour and a new point */ |
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216 error = FT_GLYPHLOADER_CHECK_POINTS( loader, 1, 1 ); |
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217 if ( !error ) |
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218 /* add new start point */ |
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219 error = pfr_glyph_line_to( glyph, to ); |
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220 |
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221 return error; |
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222 } |
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223 |
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224 |
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225 static void |
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226 pfr_glyph_end( PFR_Glyph glyph ) |
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227 { |
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228 /* close current contour if any */ |
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229 pfr_glyph_close_contour( glyph ); |
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230 |
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231 /* merge the current glyph into the stack */ |
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232 FT_GlyphLoader_Add( glyph->loader ); |
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233 } |
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234 |
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235 |
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236 /*************************************************************************/ |
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237 /*************************************************************************/ |
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238 /***** *****/ |
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239 /***** PFR GLYPH LOADER *****/ |
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240 /***** *****/ |
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241 /*************************************************************************/ |
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242 /*************************************************************************/ |
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243 |
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244 |
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245 /* load a simple glyph */ |
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246 static FT_Error |
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247 pfr_glyph_load_simple( PFR_Glyph glyph, |
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248 FT_Byte* p, |
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249 FT_Byte* limit ) |
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250 { |
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251 FT_Error error = PFR_Err_Ok; |
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252 FT_Memory memory = glyph->loader->memory; |
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253 FT_UInt flags, x_count, y_count, i, count, mask; |
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254 FT_Int x; |
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255 |
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256 |
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257 PFR_CHECK( 1 ); |
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258 flags = PFR_NEXT_BYTE( p ); |
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259 |
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260 /* test for composite glyphs */ |
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261 if ( flags & PFR_GLYPH_IS_COMPOUND ) |
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262 goto Failure; |
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263 |
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264 x_count = 0; |
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265 y_count = 0; |
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266 |
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267 if ( flags & PFR_GLYPH_1BYTE_XYCOUNT ) |
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268 { |
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269 PFR_CHECK( 1 ); |
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270 count = PFR_NEXT_BYTE( p ); |
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271 x_count = count & 15; |
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272 y_count = count >> 4; |
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273 } |
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274 else |
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275 { |
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276 if ( flags & PFR_GLYPH_XCOUNT ) |
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277 { |
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278 PFR_CHECK( 1 ); |
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279 x_count = PFR_NEXT_BYTE( p ); |
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280 } |
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281 |
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282 if ( flags & PFR_GLYPH_YCOUNT ) |
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283 { |
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284 PFR_CHECK( 1 ); |
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285 y_count = PFR_NEXT_BYTE( p ); |
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286 } |
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287 } |
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288 |
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289 count = x_count + y_count; |
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290 |
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291 /* re-allocate array when necessary */ |
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292 if ( count > glyph->max_xy_control ) |
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293 { |
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294 FT_UInt new_max = FT_PAD_CEIL( count, 8 ); |
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295 |
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296 |
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297 if ( FT_RENEW_ARRAY( glyph->x_control, |
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298 glyph->max_xy_control, |
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299 new_max ) ) |
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300 goto Exit; |
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301 |
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302 glyph->max_xy_control = new_max; |
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303 } |
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304 |
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305 glyph->y_control = glyph->x_control + x_count; |
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306 |
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307 mask = 0; |
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308 x = 0; |
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309 |
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310 for ( i = 0; i < count; i++ ) |
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311 { |
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312 if ( ( i & 7 ) == 0 ) |
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313 { |
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314 PFR_CHECK( 1 ); |
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315 mask = PFR_NEXT_BYTE( p ); |
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316 } |
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317 |
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318 if ( mask & 1 ) |
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319 { |
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320 PFR_CHECK( 2 ); |
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321 x = PFR_NEXT_SHORT( p ); |
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322 } |
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323 else |
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324 { |
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325 PFR_CHECK( 1 ); |
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326 x += PFR_NEXT_BYTE( p ); |
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327 } |
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328 |
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329 glyph->x_control[i] = x; |
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330 |
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331 mask >>= 1; |
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332 } |
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333 |
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334 /* XXX: for now we ignore the secondary stroke and edge definitions */ |
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335 /* since we don't want to support native PFR hinting */ |
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336 /* */ |
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337 if ( flags & PFR_GLYPH_EXTRA_ITEMS ) |
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338 { |
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339 error = pfr_extra_items_skip( &p, limit ); |
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340 if ( error ) |
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341 goto Exit; |
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342 } |
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343 |
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344 pfr_glyph_start( glyph ); |
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345 |
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346 /* now load a simple glyph */ |
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347 { |
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348 FT_Vector pos[4]; |
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349 FT_Vector* cur; |
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350 |
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351 |
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352 pos[0].x = pos[0].y = 0; |
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353 pos[3] = pos[0]; |
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354 |
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355 for (;;) |
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356 { |
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357 FT_UInt format, format_low, args_format = 0, args_count, n; |
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358 |
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359 |
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360 /***************************************************************/ |
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361 /* read instruction */ |
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362 /* */ |
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363 PFR_CHECK( 1 ); |
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364 format = PFR_NEXT_BYTE( p ); |
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365 format_low = format & 15; |
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366 |
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367 switch ( format >> 4 ) |
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368 { |
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369 case 0: /* end glyph */ |
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370 FT_TRACE6(( "- end glyph" )); |
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371 args_count = 0; |
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372 break; |
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373 |
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374 case 1: /* general line operation */ |
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375 FT_TRACE6(( "- general line" )); |
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376 goto Line1; |
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377 |
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378 case 4: /* move to inside contour */ |
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379 FT_TRACE6(( "- move to inside" )); |
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380 goto Line1; |
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381 |
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382 case 5: /* move to outside contour */ |
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383 FT_TRACE6(( "- move to outside" )); |
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384 Line1: |
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385 args_format = format_low; |
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386 args_count = 1; |
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387 break; |
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388 |
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389 case 2: /* horizontal line to */ |
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390 FT_TRACE6(( "- horizontal line to cx.%d", format_low )); |
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391 if ( format_low >= x_count ) |
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392 goto Failure; |
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393 pos[0].x = glyph->x_control[format_low]; |
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394 pos[0].y = pos[3].y; |
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395 pos[3] = pos[0]; |
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396 args_count = 0; |
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397 break; |
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398 |
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399 case 3: /* vertical line to */ |
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400 FT_TRACE6(( "- vertical line to cy.%d", format_low )); |
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401 if ( format_low >= y_count ) |
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402 goto Failure; |
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403 pos[0].x = pos[3].x; |
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404 pos[0].y = glyph->y_control[format_low]; |
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405 pos[3] = pos[0]; |
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406 args_count = 0; |
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407 break; |
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408 |
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409 case 6: /* horizontal to vertical curve */ |
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410 FT_TRACE6(( "- hv curve " )); |
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411 args_format = 0xB8E; |
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412 args_count = 3; |
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413 break; |
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414 |
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415 case 7: /* vertical to horizontal curve */ |
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416 FT_TRACE6(( "- vh curve" )); |
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417 args_format = 0xE2B; |
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418 args_count = 3; |
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419 break; |
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420 |
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421 default: /* general curve to */ |
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422 FT_TRACE6(( "- general curve" )); |
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423 args_count = 4; |
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424 args_format = format_low; |
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425 } |
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426 |
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427 /***********************************************************/ |
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428 /* now read arguments */ |
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429 /* */ |
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430 cur = pos; |
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431 for ( n = 0; n < args_count; n++ ) |
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432 { |
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433 FT_UInt idx; |
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434 FT_Int delta; |
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435 |
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436 |
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437 /* read the X argument */ |
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438 switch ( args_format & 3 ) |
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439 { |
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440 case 0: /* 8-bit index */ |
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441 PFR_CHECK( 1 ); |
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442 idx = PFR_NEXT_BYTE( p ); |
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443 if ( idx >= x_count ) |
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444 goto Failure; |
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445 cur->x = glyph->x_control[idx]; |
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446 FT_TRACE7(( " cx#%d", idx )); |
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447 break; |
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448 |
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449 case 1: /* 16-bit value */ |
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450 PFR_CHECK( 2 ); |
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451 cur->x = PFR_NEXT_SHORT( p ); |
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452 FT_TRACE7(( " x.%d", cur->x )); |
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453 break; |
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454 |
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455 case 2: /* 8-bit delta */ |
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456 PFR_CHECK( 1 ); |
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457 delta = PFR_NEXT_INT8( p ); |
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458 cur->x = pos[3].x + delta; |
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459 FT_TRACE7(( " dx.%d", delta )); |
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460 break; |
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461 |
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462 default: |
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463 FT_TRACE7(( " |" )); |
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464 cur->x = pos[3].x; |
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465 } |
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466 |
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467 /* read the Y argument */ |
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468 switch ( ( args_format >> 2 ) & 3 ) |
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469 { |
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470 case 0: /* 8-bit index */ |
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471 PFR_CHECK( 1 ); |
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472 idx = PFR_NEXT_BYTE( p ); |
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473 if ( idx >= y_count ) |
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474 goto Failure; |
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475 cur->y = glyph->y_control[idx]; |
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476 FT_TRACE7(( " cy#%d", idx )); |
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477 break; |
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478 |
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479 case 1: /* 16-bit absolute value */ |
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480 PFR_CHECK( 2 ); |
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481 cur->y = PFR_NEXT_SHORT( p ); |
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482 FT_TRACE7(( " y.%d", cur->y )); |
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483 break; |
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484 |
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485 case 2: /* 8-bit delta */ |
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486 PFR_CHECK( 1 ); |
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487 delta = PFR_NEXT_INT8( p ); |
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488 cur->y = pos[3].y + delta; |
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489 FT_TRACE7(( " dy.%d", delta )); |
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490 break; |
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491 |
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492 default: |
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493 FT_TRACE7(( " -" )); |
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494 cur->y = pos[3].y; |
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495 } |
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496 |
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497 /* read the additional format flag for the general curve */ |
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498 if ( n == 0 && args_count == 4 ) |
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499 { |
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500 PFR_CHECK( 1 ); |
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501 args_format = PFR_NEXT_BYTE( p ); |
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502 args_count--; |
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503 } |
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504 else |
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505 args_format >>= 4; |
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506 |
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507 /* save the previous point */ |
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508 pos[3] = cur[0]; |
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509 cur++; |
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510 } |
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511 |
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512 FT_TRACE7(( "\n" )); |
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513 |
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514 /***********************************************************/ |
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515 /* finally, execute instruction */ |
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516 /* */ |
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517 switch ( format >> 4 ) |
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518 { |
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519 case 0: /* end glyph => EXIT */ |
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520 pfr_glyph_end( glyph ); |
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521 goto Exit; |
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522 |
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523 case 1: /* line operations */ |
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524 case 2: |
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525 case 3: |
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526 error = pfr_glyph_line_to( glyph, pos ); |
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527 goto Test_Error; |
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528 |
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529 case 4: /* move to inside contour */ |
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530 case 5: /* move to outside contour */ |
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531 error = pfr_glyph_move_to( glyph, pos ); |
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532 goto Test_Error; |
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533 |
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534 default: /* curve operations */ |
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535 error = pfr_glyph_curve_to( glyph, pos, pos + 1, pos + 2 ); |
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536 |
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537 Test_Error: /* test error condition */ |
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538 if ( error ) |
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539 goto Exit; |
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540 } |
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541 } /* for (;;) */ |
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542 } |
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543 |
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544 Exit: |
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545 return error; |
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546 |
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547 Failure: |
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548 Too_Short: |
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549 error = PFR_Err_Invalid_Table; |
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550 FT_ERROR(( "pfr_glyph_load_simple: invalid glyph data\n" )); |
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551 goto Exit; |
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552 } |
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553 |
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554 |
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555 /* load a composite/compound glyph */ |
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556 static FT_Error |
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557 pfr_glyph_load_compound( PFR_Glyph glyph, |
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558 FT_Byte* p, |
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559 FT_Byte* limit ) |
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560 { |
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561 FT_Error error = PFR_Err_Ok; |
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562 FT_GlyphLoader loader = glyph->loader; |
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563 FT_Memory memory = loader->memory; |
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564 PFR_SubGlyph subglyph; |
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565 FT_UInt flags, i, count, org_count; |
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566 FT_Int x_pos, y_pos; |
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567 |
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568 |
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569 PFR_CHECK( 1 ); |
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570 flags = PFR_NEXT_BYTE( p ); |
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571 |
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572 /* test for composite glyphs */ |
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573 if ( !( flags & PFR_GLYPH_IS_COMPOUND ) ) |
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574 goto Failure; |
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575 |
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576 count = flags & 0x3F; |
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577 |
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578 /* ignore extra items when present */ |
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579 /* */ |
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580 if ( flags & PFR_GLYPH_EXTRA_ITEMS ) |
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581 { |
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582 error = pfr_extra_items_skip( &p, limit ); |
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583 if (error) goto Exit; |
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584 } |
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585 |
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586 /* we can't rely on the FT_GlyphLoader to load sub-glyphs, because */ |
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587 /* the PFR format is dumb, using direct file offsets to point to the */ |
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588 /* sub-glyphs (instead of glyph indices). Sigh. */ |
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589 /* */ |
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590 /* For now, we load the list of sub-glyphs into a different array */ |
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591 /* but this will prevent us from using the auto-hinter at its best */ |
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592 /* quality. */ |
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593 /* */ |
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594 org_count = glyph->num_subs; |
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595 |
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596 if ( org_count + count > glyph->max_subs ) |
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597 { |
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598 FT_UInt new_max = ( org_count + count + 3 ) & (FT_UInt)-4; |
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599 |
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600 |
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601 /* we arbitrarily limit the number of subglyphs */ |
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602 /* to avoid endless recursion */ |
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603 if ( new_max > 64 ) |
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604 { |
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605 error = PFR_Err_Invalid_Table; |
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606 FT_ERROR(( "pfr_glyph_load_compound:" |
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607 " too many compound glyphs components\n" )); |
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608 goto Exit; |
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609 } |
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610 |
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611 if ( FT_RENEW_ARRAY( glyph->subs, glyph->max_subs, new_max ) ) |
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612 goto Exit; |
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613 |
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614 glyph->max_subs = new_max; |
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615 } |
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616 |
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617 subglyph = glyph->subs + org_count; |
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618 |
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619 for ( i = 0; i < count; i++, subglyph++ ) |
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620 { |
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621 FT_UInt format; |
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622 |
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623 |
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624 x_pos = 0; |
|
625 y_pos = 0; |
|
626 |
|
627 PFR_CHECK( 1 ); |
|
628 format = PFR_NEXT_BYTE( p ); |
|
629 |
|
630 /* read scale when available */ |
|
631 subglyph->x_scale = 0x10000L; |
|
632 if ( format & PFR_SUBGLYPH_XSCALE ) |
|
633 { |
|
634 PFR_CHECK( 2 ); |
|
635 subglyph->x_scale = PFR_NEXT_SHORT( p ) << 4; |
|
636 } |
|
637 |
|
638 subglyph->y_scale = 0x10000L; |
|
639 if ( format & PFR_SUBGLYPH_YSCALE ) |
|
640 { |
|
641 PFR_CHECK( 2 ); |
|
642 subglyph->y_scale = PFR_NEXT_SHORT( p ) << 4; |
|
643 } |
|
644 |
|
645 /* read offset */ |
|
646 switch ( format & 3 ) |
|
647 { |
|
648 case 1: |
|
649 PFR_CHECK( 2 ); |
|
650 x_pos = PFR_NEXT_SHORT( p ); |
|
651 break; |
|
652 |
|
653 case 2: |
|
654 PFR_CHECK( 1 ); |
|
655 x_pos += PFR_NEXT_INT8( p ); |
|
656 break; |
|
657 |
|
658 default: |
|
659 ; |
|
660 } |
|
661 |
|
662 switch ( ( format >> 2 ) & 3 ) |
|
663 { |
|
664 case 1: |
|
665 PFR_CHECK( 2 ); |
|
666 y_pos = PFR_NEXT_SHORT( p ); |
|
667 break; |
|
668 |
|
669 case 2: |
|
670 PFR_CHECK( 1 ); |
|
671 y_pos += PFR_NEXT_INT8( p ); |
|
672 break; |
|
673 |
|
674 default: |
|
675 ; |
|
676 } |
|
677 |
|
678 subglyph->x_delta = x_pos; |
|
679 subglyph->y_delta = y_pos; |
|
680 |
|
681 /* read glyph position and size now */ |
|
682 if ( format & PFR_SUBGLYPH_2BYTE_SIZE ) |
|
683 { |
|
684 PFR_CHECK( 2 ); |
|
685 subglyph->gps_size = PFR_NEXT_USHORT( p ); |
|
686 } |
|
687 else |
|
688 { |
|
689 PFR_CHECK( 1 ); |
|
690 subglyph->gps_size = PFR_NEXT_BYTE( p ); |
|
691 } |
|
692 |
|
693 if ( format & PFR_SUBGLYPH_3BYTE_OFFSET ) |
|
694 { |
|
695 PFR_CHECK( 3 ); |
|
696 subglyph->gps_offset = PFR_NEXT_LONG( p ); |
|
697 } |
|
698 else |
|
699 { |
|
700 PFR_CHECK( 2 ); |
|
701 subglyph->gps_offset = PFR_NEXT_USHORT( p ); |
|
702 } |
|
703 |
|
704 glyph->num_subs++; |
|
705 } |
|
706 |
|
707 Exit: |
|
708 return error; |
|
709 |
|
710 Failure: |
|
711 Too_Short: |
|
712 error = PFR_Err_Invalid_Table; |
|
713 FT_ERROR(( "pfr_glyph_load_compound: invalid glyph data\n" )); |
|
714 goto Exit; |
|
715 } |
|
716 |
|
717 |
|
718 static FT_Error |
|
719 pfr_glyph_load_rec( PFR_Glyph glyph, |
|
720 FT_Stream stream, |
|
721 FT_ULong gps_offset, |
|
722 FT_ULong offset, |
|
723 FT_ULong size ) |
|
724 { |
|
725 FT_Error error; |
|
726 FT_Byte* p; |
|
727 FT_Byte* limit; |
|
728 |
|
729 |
|
730 if ( FT_STREAM_SEEK( gps_offset + offset ) || |
|
731 FT_FRAME_ENTER( size ) ) |
|
732 goto Exit; |
|
733 |
|
734 p = (FT_Byte*)stream->cursor; |
|
735 limit = p + size; |
|
736 |
|
737 if ( size > 0 && *p & PFR_GLYPH_IS_COMPOUND ) |
|
738 { |
|
739 FT_Int n, old_count, count; |
|
740 FT_GlyphLoader loader = glyph->loader; |
|
741 FT_Outline* base = &loader->base.outline; |
|
742 |
|
743 |
|
744 old_count = glyph->num_subs; |
|
745 |
|
746 /* this is a compound glyph - load it */ |
|
747 error = pfr_glyph_load_compound( glyph, p, limit ); |
|
748 |
|
749 FT_FRAME_EXIT(); |
|
750 |
|
751 if ( error ) |
|
752 goto Exit; |
|
753 |
|
754 count = glyph->num_subs - old_count; |
|
755 |
|
756 FT_TRACE4(( "compound glyph with %d elements (offset %lu):\n", |
|
757 count, offset )); |
|
758 |
|
759 /* now, load each individual glyph */ |
|
760 for ( n = 0; n < count; n++ ) |
|
761 { |
|
762 FT_Int i, old_points, num_points; |
|
763 PFR_SubGlyph subglyph; |
|
764 |
|
765 |
|
766 FT_TRACE4(( "subglyph %d:\n", n )); |
|
767 |
|
768 subglyph = glyph->subs + old_count + n; |
|
769 old_points = base->n_points; |
|
770 |
|
771 error = pfr_glyph_load_rec( glyph, stream, gps_offset, |
|
772 subglyph->gps_offset, |
|
773 subglyph->gps_size ); |
|
774 if ( error ) |
|
775 break; |
|
776 |
|
777 /* note that `glyph->subs' might have been re-allocated */ |
|
778 subglyph = glyph->subs + old_count + n; |
|
779 num_points = base->n_points - old_points; |
|
780 |
|
781 /* translate and eventually scale the new glyph points */ |
|
782 if ( subglyph->x_scale != 0x10000L || subglyph->y_scale != 0x10000L ) |
|
783 { |
|
784 FT_Vector* vec = base->points + old_points; |
|
785 |
|
786 |
|
787 for ( i = 0; i < num_points; i++, vec++ ) |
|
788 { |
|
789 vec->x = FT_MulFix( vec->x, subglyph->x_scale ) + |
|
790 subglyph->x_delta; |
|
791 vec->y = FT_MulFix( vec->y, subglyph->y_scale ) + |
|
792 subglyph->y_delta; |
|
793 } |
|
794 } |
|
795 else |
|
796 { |
|
797 FT_Vector* vec = loader->base.outline.points + old_points; |
|
798 |
|
799 |
|
800 for ( i = 0; i < num_points; i++, vec++ ) |
|
801 { |
|
802 vec->x += subglyph->x_delta; |
|
803 vec->y += subglyph->y_delta; |
|
804 } |
|
805 } |
|
806 |
|
807 /* proceed to next sub-glyph */ |
|
808 } |
|
809 |
|
810 FT_TRACE4(( "end compound glyph with %d elements\n", count )); |
|
811 } |
|
812 else |
|
813 { |
|
814 FT_TRACE4(( "simple glyph (offset %lu)\n", offset )); |
|
815 |
|
816 /* load a simple glyph */ |
|
817 error = pfr_glyph_load_simple( glyph, p, limit ); |
|
818 |
|
819 FT_FRAME_EXIT(); |
|
820 } |
|
821 |
|
822 Exit: |
|
823 return error; |
|
824 } |
|
825 |
|
826 |
|
827 FT_LOCAL_DEF( FT_Error ) |
|
828 pfr_glyph_load( PFR_Glyph glyph, |
|
829 FT_Stream stream, |
|
830 FT_ULong gps_offset, |
|
831 FT_ULong offset, |
|
832 FT_ULong size ) |
|
833 { |
|
834 /* initialize glyph loader */ |
|
835 FT_GlyphLoader_Rewind( glyph->loader ); |
|
836 |
|
837 glyph->num_subs = 0; |
|
838 |
|
839 /* load the glyph, recursively when needed */ |
|
840 return pfr_glyph_load_rec( glyph, stream, gps_offset, offset, size ); |
|
841 } |
|
842 |
|
843 |
|
844 /* END */ |