1 /***************************************************************************/ |
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2 /* */ |
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3 /* cffgload.h */ |
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4 /* */ |
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5 /* OpenType Glyph Loader (specification). */ |
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6 /* */ |
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7 /* Copyright 1996-2001, 2002, 2003, 2004, 2006, 2007, 2008, 2009 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 #ifndef __CFFGLOAD_H__ |
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20 #define __CFFGLOAD_H__ |
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21 |
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22 |
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23 #include <ft2build.h> |
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24 #include FT_FREETYPE_H |
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25 #include "cffobjs.h" |
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26 |
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27 |
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28 FT_BEGIN_HEADER |
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29 |
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30 |
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31 #define CFF_MAX_OPERANDS 48 |
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32 #define CFF_MAX_SUBRS_CALLS 32 |
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33 #define CFF_MAX_TRANS_ELEMENTS 32 |
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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 /* <Structure> */ |
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39 /* CFF_Builder */ |
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40 /* */ |
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41 /* <Description> */ |
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42 /* A structure used during glyph loading to store its outline. */ |
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43 /* */ |
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44 /* <Fields> */ |
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45 /* memory :: The current memory object. */ |
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46 /* */ |
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47 /* face :: The current face object. */ |
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48 /* */ |
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49 /* glyph :: The current glyph slot. */ |
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50 /* */ |
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51 /* loader :: The current glyph loader. */ |
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52 /* */ |
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53 /* base :: The base glyph outline. */ |
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54 /* */ |
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55 /* current :: The current glyph outline. */ |
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56 /* */ |
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57 /* pos_x :: The horizontal translation (if composite glyph). */ |
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58 /* */ |
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59 /* pos_y :: The vertical translation (if composite glyph). */ |
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60 /* */ |
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61 /* left_bearing :: The left side bearing point. */ |
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62 /* */ |
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63 /* advance :: The horizontal advance vector. */ |
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64 /* */ |
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65 /* bbox :: Unused. */ |
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66 /* */ |
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67 /* path_begun :: A flag which indicates that a new path has begun. */ |
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68 /* */ |
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69 /* load_points :: If this flag is not set, no points are loaded. */ |
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70 /* */ |
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71 /* no_recurse :: Set but not used. */ |
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72 /* */ |
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73 /* metrics_only :: A boolean indicating that we only want to compute */ |
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74 /* the metrics of a given glyph, not load all of its */ |
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75 /* points. */ |
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76 /* */ |
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77 /* hints_funcs :: Auxiliary pointer for hinting. */ |
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78 /* */ |
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79 /* hints_globals :: Auxiliary pointer for hinting. */ |
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80 /* */ |
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81 typedef struct CFF_Builder_ |
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82 { |
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83 FT_Memory memory; |
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84 TT_Face face; |
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85 CFF_GlyphSlot glyph; |
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86 FT_GlyphLoader loader; |
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87 FT_Outline* base; |
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88 FT_Outline* current; |
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89 |
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90 FT_Pos pos_x; |
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91 FT_Pos pos_y; |
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92 |
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93 FT_Vector left_bearing; |
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94 FT_Vector advance; |
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95 |
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96 FT_BBox bbox; /* bounding box */ |
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97 FT_Bool path_begun; |
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98 FT_Bool load_points; |
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99 FT_Bool no_recurse; |
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100 |
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101 FT_Bool metrics_only; |
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102 |
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103 void* hints_funcs; /* hinter-specific */ |
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104 void* hints_globals; /* hinter-specific */ |
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105 |
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106 } CFF_Builder; |
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107 |
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108 |
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109 /* execution context charstring zone */ |
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110 |
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111 typedef struct CFF_Decoder_Zone_ |
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112 { |
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113 FT_Byte* base; |
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114 FT_Byte* limit; |
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115 FT_Byte* cursor; |
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116 |
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117 } CFF_Decoder_Zone; |
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118 |
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119 |
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120 typedef struct CFF_Decoder_ |
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121 { |
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122 CFF_Builder builder; |
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123 CFF_Font cff; |
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124 |
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125 FT_Fixed stack[CFF_MAX_OPERANDS + 1]; |
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126 FT_Fixed* top; |
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127 |
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128 CFF_Decoder_Zone zones[CFF_MAX_SUBRS_CALLS + 1]; |
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129 CFF_Decoder_Zone* zone; |
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130 |
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131 FT_Int flex_state; |
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132 FT_Int num_flex_vectors; |
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133 FT_Vector flex_vectors[7]; |
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134 |
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135 FT_Pos glyph_width; |
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136 FT_Pos nominal_width; |
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137 |
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138 FT_Bool read_width; |
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139 FT_Bool width_only; |
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140 FT_Int num_hints; |
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141 FT_Fixed buildchar[CFF_MAX_TRANS_ELEMENTS]; |
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142 |
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143 FT_UInt num_locals; |
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144 FT_UInt num_globals; |
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145 |
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146 FT_Int locals_bias; |
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147 FT_Int globals_bias; |
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148 |
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149 FT_Byte** locals; |
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150 FT_Byte** globals; |
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151 |
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152 FT_Byte** glyph_names; /* for pure CFF fonts only */ |
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153 FT_UInt num_glyphs; /* number of glyphs in font */ |
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154 |
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155 FT_Render_Mode hint_mode; |
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156 |
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157 FT_Bool seac; |
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158 |
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159 } CFF_Decoder; |
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160 |
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161 |
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162 FT_LOCAL( void ) |
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163 cff_decoder_init( CFF_Decoder* decoder, |
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164 TT_Face face, |
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165 CFF_Size size, |
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166 CFF_GlyphSlot slot, |
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167 FT_Bool hinting, |
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168 FT_Render_Mode hint_mode ); |
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169 |
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170 FT_LOCAL( FT_Error ) |
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171 cff_decoder_prepare( CFF_Decoder* decoder, |
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172 CFF_Size size, |
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173 FT_UInt glyph_index ); |
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174 |
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175 #if 0 /* unused until we support pure CFF fonts */ |
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176 |
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177 /* Compute the maximum advance width of a font through quick parsing */ |
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178 FT_LOCAL( FT_Error ) |
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179 cff_compute_max_advance( TT_Face face, |
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180 FT_Int* max_advance ); |
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181 |
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182 #endif /* 0 */ |
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183 |
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184 FT_LOCAL( FT_Error ) |
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185 cff_decoder_parse_charstrings( CFF_Decoder* decoder, |
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186 FT_Byte* charstring_base, |
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187 FT_ULong charstring_len ); |
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188 |
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189 FT_LOCAL( FT_Error ) |
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190 cff_slot_load( CFF_GlyphSlot glyph, |
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191 CFF_Size size, |
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192 FT_UInt glyph_index, |
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193 FT_Int32 load_flags ); |
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194 |
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195 |
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196 FT_END_HEADER |
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197 |
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198 #endif /* __CFFGLOAD_H__ */ |
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199 |
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200 |
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201 /* END */ |
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