1 /***************************************************************************/ |
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2 /* */ |
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3 /* pshglob.h */ |
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4 /* */ |
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5 /* PostScript hinter global hinting management. */ |
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6 /* */ |
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7 /* Copyright 2001, 2002, 2003 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 __PSHGLOB_H__ |
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20 #define __PSHGLOB_H__ |
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21 |
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22 |
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23 #include FT_FREETYPE_H |
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24 #include FT_INTERNAL_POSTSCRIPT_HINTS_H |
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25 |
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26 |
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27 FT_BEGIN_HEADER |
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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 /***** GLOBAL HINTS INTERNALS *****/ |
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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 /*************************************************************************/ |
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40 /* */ |
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41 /* @constant: */ |
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42 /* PS_GLOBALS_MAX_BLUE_ZONES */ |
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43 /* */ |
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44 /* @description: */ |
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45 /* The maximum number of blue zones in a font global hints structure. */ |
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46 /* See @PS_Globals_BluesRec. */ |
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47 /* */ |
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48 #define PS_GLOBALS_MAX_BLUE_ZONES 16 |
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49 |
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50 |
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51 /*************************************************************************/ |
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52 /* */ |
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53 /* @constant: */ |
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54 /* PS_GLOBALS_MAX_STD_WIDTHS */ |
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55 /* */ |
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56 /* @description: */ |
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57 /* The maximum number of standard and snap widths in either the */ |
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58 /* horizontal or vertical direction. See @PS_Globals_WidthsRec. */ |
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59 /* */ |
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60 #define PS_GLOBALS_MAX_STD_WIDTHS 16 |
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61 |
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62 |
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63 /* standard and snap width */ |
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64 typedef struct PSH_WidthRec_ |
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65 { |
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66 FT_Int org; |
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67 FT_Pos cur; |
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68 FT_Pos fit; |
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69 |
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70 } PSH_WidthRec, *PSH_Width; |
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71 |
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72 |
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73 /* standard and snap widths table */ |
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74 typedef struct PSH_WidthsRec_ |
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75 { |
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76 FT_UInt count; |
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77 PSH_WidthRec widths[PS_GLOBALS_MAX_STD_WIDTHS]; |
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78 |
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79 } PSH_WidthsRec, *PSH_Widths; |
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80 |
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81 |
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82 typedef struct PSH_DimensionRec_ |
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83 { |
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84 PSH_WidthsRec stdw; |
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85 FT_Fixed scale_mult; |
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86 FT_Fixed scale_delta; |
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87 |
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88 } PSH_DimensionRec, *PSH_Dimension; |
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89 |
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90 |
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91 /* blue zone descriptor */ |
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92 typedef struct PSH_Blue_ZoneRec_ |
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93 { |
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94 FT_Int org_ref; |
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95 FT_Int org_delta; |
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96 FT_Int org_top; |
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97 FT_Int org_bottom; |
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98 |
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99 FT_Pos cur_ref; |
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100 FT_Pos cur_delta; |
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101 FT_Pos cur_bottom; |
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102 FT_Pos cur_top; |
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103 |
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104 } PSH_Blue_ZoneRec, *PSH_Blue_Zone; |
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105 |
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106 |
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107 typedef struct PSH_Blue_TableRec_ |
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108 { |
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109 FT_UInt count; |
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110 PSH_Blue_ZoneRec zones[PS_GLOBALS_MAX_BLUE_ZONES]; |
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111 |
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112 } PSH_Blue_TableRec, *PSH_Blue_Table; |
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113 |
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114 |
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115 /* blue zones table */ |
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116 typedef struct PSH_BluesRec_ |
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117 { |
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118 PSH_Blue_TableRec normal_top; |
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119 PSH_Blue_TableRec normal_bottom; |
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120 PSH_Blue_TableRec family_top; |
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121 PSH_Blue_TableRec family_bottom; |
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122 |
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123 FT_Fixed blue_scale; |
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124 FT_Int blue_shift; |
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125 FT_Int blue_threshold; |
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126 FT_Int blue_fuzz; |
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127 FT_Bool no_overshoots; |
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128 |
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129 } PSH_BluesRec, *PSH_Blues; |
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130 |
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131 |
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132 /* font globals. */ |
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133 /* dimension 0 => X coordinates + vertical hints/stems */ |
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134 /* dimension 1 => Y coordinates + horizontal hints/stems */ |
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135 typedef struct PSH_GlobalsRec_ |
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136 { |
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137 FT_Memory memory; |
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138 PSH_DimensionRec dimension[2]; |
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139 PSH_BluesRec blues; |
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140 |
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141 } PSH_GlobalsRec; |
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142 |
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143 |
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144 #define PSH_BLUE_ALIGN_NONE 0 |
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145 #define PSH_BLUE_ALIGN_TOP 1 |
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146 #define PSH_BLUE_ALIGN_BOT 2 |
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147 |
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148 |
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149 typedef struct PSH_AlignmentRec_ |
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150 { |
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151 int align; |
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152 FT_Pos align_top; |
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153 FT_Pos align_bot; |
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154 |
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155 } PSH_AlignmentRec, *PSH_Alignment; |
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156 |
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157 |
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158 FT_LOCAL( void ) |
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159 psh_globals_funcs_init( PSH_Globals_FuncsRec* funcs ); |
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160 |
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161 |
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162 #if 0 |
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163 /* snap a stem width to fitter coordinates. `org_width' is in font */ |
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164 /* units. The result is in device pixels (26.6 format). */ |
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165 FT_LOCAL( FT_Pos ) |
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166 psh_dimension_snap_width( PSH_Dimension dimension, |
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167 FT_Int org_width ); |
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168 #endif |
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169 |
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170 FT_LOCAL( FT_Error ) |
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171 psh_globals_set_scale( PSH_Globals globals, |
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172 FT_Fixed x_scale, |
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173 FT_Fixed y_scale, |
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174 FT_Fixed x_delta, |
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175 FT_Fixed y_delta ); |
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176 |
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177 /* snap a stem to one or two blue zones */ |
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178 FT_LOCAL( void ) |
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179 psh_blues_snap_stem( PSH_Blues blues, |
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180 FT_Int stem_top, |
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181 FT_Int stem_bot, |
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182 PSH_Alignment alignment ); |
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183 /* */ |
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184 |
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185 #ifdef DEBUG_HINTER |
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186 extern PSH_Globals ps_debug_globals; |
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187 #endif |
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188 |
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189 |
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190 FT_END_HEADER |
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191 |
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192 |
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193 #endif /* __PSHGLOB_H__ */ |
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194 |
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195 |
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196 /* END */ |
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