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| 1 /***************************************************************************/ | |
| 2 /* */ | |
| 3 /* pshalgo.h */ | |
| 4 /* */ | |
| 5 /* PostScript hinting algorithm (specification). */ | |
| 6 /* */ | |
| 7 /* Copyright 2001-2003, 2008, 2013 by */ | |
| 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ | |
| 9 /* */ | |
| 10 /* This file is part of the FreeType project, and may only be used, */ | |
| 11 /* modified, and distributed under the terms of the FreeType project */ | |
| 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ | |
| 13 /* this file you indicate that you have read the license and */ | |
| 14 /* understand and accept it fully. */ | |
| 15 /* */ | |
| 16 /***************************************************************************/ | |
| 17 | |
| 18 | |
| 19 #ifndef __PSHALGO_H__ | |
| 20 #define __PSHALGO_H__ | |
| 21 | |
| 22 | |
| 23 #include "pshrec.h" | |
| 24 #include "pshglob.h" | |
| 25 | |
| 26 | |
| 27 FT_BEGIN_HEADER | |
| 28 | |
| 29 | |
| 30 /* handle to Hint structure */ | |
| 31 typedef struct PSH_HintRec_* PSH_Hint; | |
| 32 | |
| 33 /* hint bit-flags */ | |
| 34 typedef enum PSH_Hint_Flags_ | |
| 35 { | |
| 36 PSH_HINT_GHOST = PS_HINT_FLAG_GHOST, | |
| 37 PSH_HINT_BOTTOM = PS_HINT_FLAG_BOTTOM, | |
| 38 PSH_HINT_ACTIVE = 4, | |
| 39 PSH_HINT_FITTED = 8 | |
| 40 | |
| 41 } PSH_Hint_Flags; | |
| 42 | |
| 43 | |
| 44 #define psh_hint_is_active( x ) ( ( (x)->flags & PSH_HINT_ACTIVE ) != 0 ) | |
| 45 #define psh_hint_is_ghost( x ) ( ( (x)->flags & PSH_HINT_GHOST ) != 0 ) | |
| 46 #define psh_hint_is_fitted( x ) ( ( (x)->flags & PSH_HINT_FITTED ) != 0 ) | |
| 47 | |
| 48 #define psh_hint_activate( x ) (x)->flags |= PSH_HINT_ACTIVE | |
| 49 #define psh_hint_deactivate( x ) (x)->flags &= ~PSH_HINT_ACTIVE | |
| 50 #define psh_hint_set_fitted( x ) (x)->flags |= PSH_HINT_FITTED | |
| 51 | |
| 52 /* hint structure */ | |
| 53 typedef struct PSH_HintRec_ | |
| 54 { | |
| 55 FT_Int org_pos; | |
| 56 FT_Int org_len; | |
| 57 FT_Pos cur_pos; | |
| 58 FT_Pos cur_len; | |
| 59 FT_UInt flags; | |
| 60 PSH_Hint parent; | |
| 61 FT_Int order; | |
| 62 | |
| 63 } PSH_HintRec; | |
| 64 | |
| 65 | |
| 66 /* this is an interpolation zone used for strong points; */ | |
| 67 /* weak points are interpolated according to their strong */ | |
| 68 /* neighbours */ | |
| 69 typedef struct PSH_ZoneRec_ | |
| 70 { | |
| 71 FT_Fixed scale; | |
| 72 FT_Fixed delta; | |
| 73 FT_Pos min; | |
| 74 FT_Pos max; | |
| 75 | |
| 76 } PSH_ZoneRec, *PSH_Zone; | |
| 77 | |
| 78 | |
| 79 typedef struct PSH_Hint_TableRec_ | |
| 80 { | |
| 81 FT_UInt max_hints; | |
| 82 FT_UInt num_hints; | |
| 83 PSH_Hint hints; | |
| 84 PSH_Hint* sort; | |
| 85 PSH_Hint* sort_global; | |
| 86 FT_UInt num_zones; | |
| 87 PSH_ZoneRec* zones; | |
| 88 PSH_Zone zone; | |
| 89 PS_Mask_Table hint_masks; | |
| 90 PS_Mask_Table counter_masks; | |
| 91 | |
| 92 } PSH_Hint_TableRec, *PSH_Hint_Table; | |
| 93 | |
| 94 | |
| 95 typedef struct PSH_PointRec_* PSH_Point; | |
| 96 typedef struct PSH_ContourRec_* PSH_Contour; | |
| 97 | |
| 98 enum | |
| 99 { | |
| 100 PSH_DIR_NONE = 4, | |
| 101 PSH_DIR_UP = -1, | |
| 102 PSH_DIR_DOWN = 1, | |
| 103 PSH_DIR_LEFT = -2, | |
| 104 PSH_DIR_RIGHT = 2 | |
| 105 }; | |
| 106 | |
| 107 #define PSH_DIR_HORIZONTAL 2 | |
| 108 #define PSH_DIR_VERTICAL 1 | |
| 109 | |
| 110 #define PSH_DIR_COMPARE( d1, d2 ) ( (d1) == (d2) || (d1) == -(d2) ) | |
| 111 #define PSH_DIR_IS_HORIZONTAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_HORIZONTAL ) | |
| 112 #define PSH_DIR_IS_VERTICAL( d ) PSH_DIR_COMPARE( d, PSH_DIR_VERTICAL ) | |
| 113 | |
| 114 | |
| 115 /* the following bit-flags are computed once by the glyph */ | |
| 116 /* analyzer, for both dimensions */ | |
| 117 enum | |
| 118 { | |
| 119 PSH_POINT_OFF = 1, /* point is off the curve */ | |
| 120 PSH_POINT_SMOOTH = 2, /* point is smooth */ | |
| 121 PSH_POINT_INFLEX = 4 /* point is inflection */ | |
| 122 }; | |
| 123 | |
| 124 #define psh_point_is_smooth( p ) ( (p)->flags & PSH_POINT_SMOOTH ) | |
| 125 #define psh_point_is_off( p ) ( (p)->flags & PSH_POINT_OFF ) | |
| 126 #define psh_point_is_inflex( p ) ( (p)->flags & PSH_POINT_INFLEX ) | |
| 127 | |
| 128 #define psh_point_set_smooth( p ) (p)->flags |= PSH_POINT_SMOOTH | |
| 129 #define psh_point_set_off( p ) (p)->flags |= PSH_POINT_OFF | |
| 130 #define psh_point_set_inflex( p ) (p)->flags |= PSH_POINT_INFLEX | |
| 131 | |
| 132 /* the following bit-flags are re-computed for each dimension */ | |
| 133 enum | |
| 134 { | |
| 135 PSH_POINT_STRONG = 16, /* point is strong */ | |
| 136 PSH_POINT_FITTED = 32, /* point is already fitted */ | |
| 137 PSH_POINT_EXTREMUM = 64, /* point is local extremum */ | |
| 138 PSH_POINT_POSITIVE = 128, /* extremum has positive contour flow */ | |
| 139 PSH_POINT_NEGATIVE = 256, /* extremum has negative contour flow */ | |
| 140 PSH_POINT_EDGE_MIN = 512, /* point is aligned to left/bottom stem edge */ | |
| 141 PSH_POINT_EDGE_MAX = 1024 /* point is aligned to top/right stem edge */ | |
| 142 }; | |
| 143 | |
| 144 #define psh_point_is_strong( p ) ( (p)->flags2 & PSH_POINT_STRONG ) | |
| 145 #define psh_point_is_fitted( p ) ( (p)->flags2 & PSH_POINT_FITTED ) | |
| 146 #define psh_point_is_extremum( p ) ( (p)->flags2 & PSH_POINT_EXTREMUM ) | |
| 147 #define psh_point_is_positive( p ) ( (p)->flags2 & PSH_POINT_POSITIVE ) | |
| 148 #define psh_point_is_negative( p ) ( (p)->flags2 & PSH_POINT_NEGATIVE ) | |
| 149 #define psh_point_is_edge_min( p ) ( (p)->flags2 & PSH_POINT_EDGE_MIN ) | |
| 150 #define psh_point_is_edge_max( p ) ( (p)->flags2 & PSH_POINT_EDGE_MAX ) | |
| 151 | |
| 152 #define psh_point_set_strong( p ) (p)->flags2 |= PSH_POINT_STRONG | |
| 153 #define psh_point_set_fitted( p ) (p)->flags2 |= PSH_POINT_FITTED | |
| 154 #define psh_point_set_extremum( p ) (p)->flags2 |= PSH_POINT_EXTREMUM | |
| 155 #define psh_point_set_positive( p ) (p)->flags2 |= PSH_POINT_POSITIVE | |
| 156 #define psh_point_set_negative( p ) (p)->flags2 |= PSH_POINT_NEGATIVE | |
| 157 #define psh_point_set_edge_min( p ) (p)->flags2 |= PSH_POINT_EDGE_MIN | |
| 158 #define psh_point_set_edge_max( p ) (p)->flags2 |= PSH_POINT_EDGE_MAX | |
| 159 | |
| 160 | |
| 161 typedef struct PSH_PointRec_ | |
| 162 { | |
| 163 PSH_Point prev; | |
| 164 PSH_Point next; | |
| 165 PSH_Contour contour; | |
| 166 FT_UInt flags; | |
| 167 FT_UInt flags2; | |
| 168 FT_Char dir_in; | |
| 169 FT_Char dir_out; | |
| 170 PSH_Hint hint; | |
| 171 FT_Pos org_u; | |
| 172 FT_Pos org_v; | |
| 173 FT_Pos cur_u; | |
| 174 #ifdef DEBUG_HINTER | |
| 175 FT_Pos org_x; | |
| 176 FT_Pos cur_x; | |
| 177 FT_Pos org_y; | |
| 178 FT_Pos cur_y; | |
| 179 FT_UInt flags_x; | |
| 180 FT_UInt flags_y; | |
| 181 #endif | |
| 182 | |
| 183 } PSH_PointRec; | |
| 184 | |
| 185 | |
| 186 typedef struct PSH_ContourRec_ | |
| 187 { | |
| 188 PSH_Point start; | |
| 189 FT_UInt count; | |
| 190 | |
| 191 } PSH_ContourRec; | |
| 192 | |
| 193 | |
| 194 typedef struct PSH_GlyphRec_ | |
| 195 { | |
| 196 FT_UInt num_points; | |
| 197 FT_UInt num_contours; | |
| 198 | |
| 199 PSH_Point points; | |
| 200 PSH_Contour contours; | |
| 201 | |
| 202 FT_Memory memory; | |
| 203 FT_Outline* outline; | |
| 204 PSH_Globals globals; | |
| 205 PSH_Hint_TableRec hint_tables[2]; | |
| 206 | |
| 207 FT_Bool vertical; | |
| 208 FT_Int major_dir; | |
| 209 FT_Int minor_dir; | |
| 210 | |
| 211 FT_Bool do_horz_hints; | |
| 212 FT_Bool do_vert_hints; | |
| 213 FT_Bool do_horz_snapping; | |
| 214 FT_Bool do_vert_snapping; | |
| 215 FT_Bool do_stem_adjust; | |
| 216 | |
| 217 } PSH_GlyphRec, *PSH_Glyph; | |
| 218 | |
| 219 | |
| 220 #ifdef DEBUG_HINTER | |
| 221 extern PSH_Hint_Table ps_debug_hint_table; | |
| 222 | |
| 223 typedef void | |
| 224 (*PSH_HintFunc)( PSH_Hint hint, | |
| 225 FT_Bool vertical ); | |
| 226 | |
| 227 extern PSH_HintFunc ps_debug_hint_func; | |
| 228 | |
| 229 extern PSH_Glyph ps_debug_glyph; | |
| 230 #endif | |
| 231 | |
| 232 | |
| 233 extern FT_Error | |
| 234 ps_hints_apply( PS_Hints ps_hints, | |
| 235 FT_Outline* outline, | |
| 236 PSH_Globals globals, | |
| 237 FT_Render_Mode hint_mode ); | |
| 238 | |
| 239 | |
| 240 FT_END_HEADER | |
| 241 | |
| 242 | |
| 243 #endif /* __PSHALGO_H__ */ | |
| 244 | |
| 245 | |
| 246 /* END */ | |
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Chromium Code Reviews
Issue 815103002:
Update freetype to 2.5.4. (Closed)
Base URL: https://pdfium.googlesource.com/pdfium.git@master