Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1 | /***************************************************************************/ |
| 2 | /* */ |
| 3 | /* afcjk.c */ |
| 4 | /* */ |
| 5 | /* Auto-fitter hinting routines for CJK script (body). */ |
| 6 | /* */ |
Werner Lemberg | 576fc2c | 2011-03-02 03:52:36 +0100 | [diff] [blame] | 7 | /* Copyright 2006-2011 by */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 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 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 18 | /* |
| 19 | * The algorithm is based on akito's autohint patch, available here: |
| 20 | * |
| 21 | * http://www.kde.gr.jp/~akito/patch/freetype2/ |
| 22 | * |
| 23 | */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 24 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 25 | #include <ft2build.h> |
| 26 | #include FT_ADVANCES_H |
| 27 | #include FT_INTERNAL_DEBUG_H |
| 28 | |
Werner Lemberg | 5225402 | 2006-02-15 06:05:52 +0000 | [diff] [blame] | 29 | #include "aftypes.h" |
| 30 | #include "aflatin.h" |
| 31 | |
| 32 | |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 33 | #ifdef AF_CONFIG_OPTION_CJK |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 34 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 35 | #undef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT |
| 36 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 37 | #include "afcjk.h" |
| 38 | #include "aferrors.h" |
| 39 | |
| 40 | |
Werner Lemberg | 576fc2c | 2011-03-02 03:52:36 +0100 | [diff] [blame] | 41 | #ifdef AF_CONFIG_OPTION_USE_WARPER |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 42 | #include "afwarp.h" |
| 43 | #endif |
| 44 | |
| 45 | |
| 46 | /*************************************************************************/ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 47 | /* */ |
| 48 | /* The macro FT_COMPONENT is used in trace mode. It is an implicit */ |
| 49 | /* parameter of the FT_TRACE() and FT_ERROR() macros, used to print/log */ |
| 50 | /* messages during execution. */ |
| 51 | /* */ |
| 52 | #undef FT_COMPONENT |
| 53 | #define FT_COMPONENT trace_afcjk |
| 54 | |
| 55 | |
| 56 | /*************************************************************************/ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 57 | /*************************************************************************/ |
| 58 | /***** *****/ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 59 | /***** C J K G L O B A L M E T R I C S *****/ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 60 | /***** *****/ |
| 61 | /*************************************************************************/ |
| 62 | /*************************************************************************/ |
| 63 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 64 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 65 | /* Basically the Latin version with AF_CJKMetrics */ |
| 66 | /* to replace AF_LatinMetrics. */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 67 | |
| 68 | FT_LOCAL_DEF( void ) |
| 69 | af_cjk_metrics_init_widths( AF_CJKMetrics metrics, |
| 70 | FT_Face face, |
| 71 | FT_ULong charcode ) |
| 72 | { |
| 73 | /* scan the array of segments in each direction */ |
| 74 | AF_GlyphHintsRec hints[1]; |
| 75 | |
| 76 | |
| 77 | af_glyph_hints_init( hints, face->memory ); |
| 78 | |
| 79 | metrics->axis[AF_DIMENSION_HORZ].width_count = 0; |
| 80 | metrics->axis[AF_DIMENSION_VERT].width_count = 0; |
| 81 | |
| 82 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 83 | FT_Error error; |
| 84 | FT_UInt glyph_index; |
| 85 | int dim; |
| 86 | AF_CJKMetricsRec dummy[1]; |
| 87 | AF_Scaler scaler = &dummy->root.scaler; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 88 | |
| 89 | |
| 90 | glyph_index = FT_Get_Char_Index( face, charcode ); |
| 91 | if ( glyph_index == 0 ) |
| 92 | goto Exit; |
| 93 | |
| 94 | error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE ); |
| 95 | if ( error || face->glyph->outline.n_points <= 0 ) |
| 96 | goto Exit; |
| 97 | |
| 98 | FT_ZERO( dummy ); |
| 99 | |
| 100 | dummy->units_per_em = metrics->units_per_em; |
| 101 | |
| 102 | scaler->x_scale = 0x10000L; |
| 103 | scaler->y_scale = 0x10000L; |
| 104 | scaler->x_delta = 0; |
| 105 | scaler->y_delta = 0; |
| 106 | |
| 107 | scaler->face = face; |
| 108 | scaler->render_mode = FT_RENDER_MODE_NORMAL; |
| 109 | scaler->flags = 0; |
| 110 | |
| 111 | af_glyph_hints_rescale( hints, (AF_ScriptMetrics)dummy ); |
| 112 | |
| 113 | error = af_glyph_hints_reload( hints, &face->glyph->outline ); |
| 114 | if ( error ) |
| 115 | goto Exit; |
| 116 | |
| 117 | for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) |
| 118 | { |
| 119 | AF_CJKAxis axis = &metrics->axis[dim]; |
| 120 | AF_AxisHints axhints = &hints->axis[dim]; |
| 121 | AF_Segment seg, limit, link; |
| 122 | FT_UInt num_widths = 0; |
| 123 | |
| 124 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 125 | error = af_latin_hints_compute_segments( hints, (AF_Dimension)dim ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 126 | if ( error ) |
| 127 | goto Exit; |
| 128 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 129 | af_latin_hints_link_segments( hints, (AF_Dimension)dim ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 130 | |
| 131 | seg = axhints->segments; |
| 132 | limit = seg + axhints->num_segments; |
| 133 | |
| 134 | for ( ; seg < limit; seg++ ) |
| 135 | { |
| 136 | link = seg->link; |
| 137 | |
| 138 | /* we only consider stem segments there! */ |
| 139 | if ( link && link->link == seg && link > seg ) |
| 140 | { |
| 141 | FT_Pos dist; |
| 142 | |
| 143 | |
| 144 | dist = seg->pos - link->pos; |
| 145 | if ( dist < 0 ) |
| 146 | dist = -dist; |
| 147 | |
| 148 | if ( num_widths < AF_CJK_MAX_WIDTHS ) |
| 149 | axis->widths[num_widths++].org = dist; |
| 150 | } |
| 151 | } |
| 152 | |
| 153 | af_sort_widths( num_widths, axis->widths ); |
| 154 | axis->width_count = num_widths; |
| 155 | } |
| 156 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 157 | Exit: |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 158 | for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) |
| 159 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 160 | AF_CJKAxis axis = &metrics->axis[dim]; |
| 161 | FT_Pos stdw; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 162 | |
| 163 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 164 | stdw = ( axis->width_count > 0 ) ? axis->widths[0].org |
| 165 | : AF_LATIN_CONSTANT( metrics, 50 ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 166 | |
| 167 | /* let's try 20% of the smallest width */ |
| 168 | axis->edge_distance_threshold = stdw / 5; |
| 169 | axis->standard_width = stdw; |
| 170 | axis->extra_light = 0; |
| 171 | } |
| 172 | } |
| 173 | |
| 174 | af_glyph_hints_done( hints ); |
| 175 | } |
| 176 | |
| 177 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 178 | #define AF_CJK_MAX_TEST_CHARACTERS 32 |
| 179 | |
| 180 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 181 | /* Each blue zone has two types of fill and unfill, this is, */ |
| 182 | /* filling the entire glyph square or not. */ |
| 183 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 184 | enum |
| 185 | { |
| 186 | AF_CJK_BLUE_TYPE_FILL, |
| 187 | AF_CJK_BLUE_TYPE_UNFILL, |
| 188 | AF_CJK_BLUE_TYPE_MAX |
| 189 | }; |
| 190 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 191 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 192 | /* Put some common and representative Han Ideographs characters here. */ |
| 193 | static const FT_ULong af_cjk_hani_blue_chars[AF_CJK_BLUE_MAX] |
| 194 | [AF_CJK_BLUE_TYPE_MAX] |
| 195 | [AF_CJK_MAX_TEST_CHARACTERS] = |
| 196 | { |
| 197 | { |
| 198 | { |
| 199 | 0x4ED6, 0x4EEC, 0x4F60, 0x4F86, 0x5011, 0x5230, 0x548C, 0x5730, |
| 200 | 0x5BF9, 0x5C0D, 0x5C31, 0x5E2D, 0x6211, 0x65F6, 0x6642, 0x6703, |
| 201 | 0x6765, 0x70BA, 0x80FD, 0x8230, 0x8AAA, 0x8BF4, 0x8FD9, 0x9019, |
| 202 | 0x9F4A /* top fill */ |
| 203 | }, |
| 204 | { |
| 205 | 0x519B, 0x540C, 0x5DF2, 0x613F, 0x65E2, 0x661F, 0x662F, 0x666F, |
| 206 | 0x6C11, 0x7167, 0x73B0, 0x73FE, 0x7406, 0x7528, 0x7F6E, 0x8981, |
| 207 | 0x8ECD, 0x90A3, 0x914D, 0x91CC, 0x958B, 0x96F7, 0x9732, 0x9762, |
| 208 | 0x987E /* top unfill */ |
| 209 | } |
| 210 | }, |
| 211 | { |
| 212 | { |
| 213 | 0x4E2A, 0x4E3A, 0x4EBA, 0x4ED6, 0x4EE5, 0x4EEC, 0x4F60, 0x4F86, |
| 214 | 0x500B, 0x5011, 0x5230, 0x548C, 0x5927, 0x5BF9, 0x5C0D, 0x5C31, |
| 215 | 0x6211, 0x65F6, 0x6642, 0x6709, 0x6765, 0x70BA, 0x8981, 0x8AAA, |
| 216 | 0x8BF4 /* bottom fill */ |
| 217 | }, |
| 218 | { |
| 219 | 0x4E3B, 0x4E9B, 0x56E0, 0x5B83, 0x60F3, 0x610F, 0x7406, 0x751F, |
| 220 | 0x7576, 0x770B, 0x7740, 0x7F6E, 0x8005, 0x81EA, 0x8457, 0x88E1, |
| 221 | 0x8FC7, 0x8FD8, 0x8FDB, 0x9032, 0x904E, 0x9053, 0x9084, 0x91CC, |
| 222 | 0x9762 /* bottom unfill */ |
| 223 | } |
| 224 | }, |
| 225 | #ifndef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT |
| 226 | { {0x0000}, {0x0000} }, |
| 227 | { {0x0000}, {0x0000} } |
| 228 | #else |
| 229 | { |
| 230 | { |
| 231 | 0x4E9B, 0x4EEC, 0x4F60, 0x4F86, 0x5011, 0x5230, 0x548C, 0x5730, |
| 232 | 0x5979, 0x5C06, 0x5C07, 0x5C31, 0x5E74, 0x5F97, 0x60C5, 0x6700, |
| 233 | 0x6837, 0x6A23, 0x7406, 0x80FD, 0x8AAA, 0x8BF4, 0x8FD9, 0x9019, |
| 234 | 0x901A /* left fill */ |
| 235 | }, |
| 236 | { |
| 237 | 0x5373, 0x5417, 0x5427, 0x542C, 0x5462, 0x54C1, 0x54CD, 0x55CE, |
| 238 | 0x5E08, 0x5E2B, 0x6536, 0x65AD, 0x65B7, 0x660E, 0x773C, 0x9593, |
| 239 | 0x95F4, 0x9645, 0x9648, 0x9650, 0x9664, 0x9673, 0x968F, 0x969B, |
| 240 | 0x96A8 /* left unfill */ |
| 241 | } |
| 242 | }, |
| 243 | { |
| 244 | { |
| 245 | 0x4E8B, 0x524D, 0x5B78, 0x5C06, 0x5C07, 0x60C5, 0x60F3, 0x6216, |
| 246 | 0x653F, 0x65AF, 0x65B0, 0x6837, 0x6A23, 0x6C11, 0x6C92, 0x6CA1, |
| 247 | 0x7136, 0x7279, 0x73B0, 0x73FE, 0x7403, 0x7B2C, 0x7D93, 0x8C01, |
| 248 | 0x8D77 /* right fill */ |
| 249 | }, |
| 250 | { |
| 251 | 0x4F8B, 0x5225, 0x522B, 0x5236, 0x52A8, 0x52D5, 0x5417, 0x55CE, |
| 252 | 0x589E, 0x6307, 0x660E, 0x671D, 0x671F, 0x6784, 0x7269, 0x786E, |
| 253 | 0x79CD, 0x8ABF, 0x8C03, 0x8CBB, 0x8D39, 0x90A3, 0x90FD, 0x9593, |
| 254 | 0x95F4 /* right unfill */ |
| 255 | } |
| 256 | } |
| 257 | #endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */ |
| 258 | }; |
| 259 | |
| 260 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 261 | /* Calculate blue zones for all the CJK_BLUE_XXX's. */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 262 | |
| 263 | static void |
| 264 | af_cjk_metrics_init_blues( AF_CJKMetrics metrics, |
| 265 | FT_Face face, |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 266 | const FT_ULong blue_chars |
| 267 | [AF_CJK_BLUE_MAX] |
| 268 | [AF_CJK_BLUE_TYPE_MAX] |
| 269 | [AF_CJK_MAX_TEST_CHARACTERS] ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 270 | { |
| 271 | FT_Pos fills[AF_CJK_MAX_TEST_CHARACTERS]; |
| 272 | FT_Pos flats[AF_CJK_MAX_TEST_CHARACTERS]; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 273 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 274 | FT_Int num_fills; |
| 275 | FT_Int num_flats; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 276 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 277 | FT_Int bb; |
| 278 | AF_CJKBlue blue; |
| 279 | FT_Error error; |
| 280 | AF_CJKAxis axis; |
| 281 | FT_GlyphSlot glyph = face->glyph; |
| 282 | |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 283 | #ifdef FT_DEBUG_LEVEL_TRACE |
Werner Lemberg | 71cc1a8 | 2011-05-30 07:20:37 +0200 | [diff] [blame] | 284 | FT_String* cjk_blue_name[AF_CJK_BLUE_MAX] = { |
| 285 | (FT_String*)"top", |
| 286 | (FT_String*)"bottom", |
| 287 | (FT_String*)"left", |
| 288 | (FT_String*)"right" |
| 289 | }; |
| 290 | FT_String* cjk_blue_type_name[AF_CJK_BLUE_TYPE_MAX] = { |
| 291 | (FT_String*)"filled", |
| 292 | (FT_String*)"unfilled" |
| 293 | }; |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 294 | #endif |
| 295 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 296 | |
| 297 | /* We compute the blues simply by loading each character from the */ |
| 298 | /* `blue_chars[blues]' string, then computing its extreme points */ |
| 299 | /* (depending blue zone type etc.). */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 300 | |
| 301 | FT_TRACE5(( "cjk blue zones computation\n" )); |
| 302 | FT_TRACE5(( "------------------------------------------------\n" )); |
| 303 | |
| 304 | for ( bb = 0; bb < AF_CJK_BLUE_MAX; bb++ ) |
| 305 | { |
| 306 | FT_Int fill_type; |
| 307 | FT_Pos* blue_ref; |
| 308 | FT_Pos* blue_shoot; |
| 309 | |
| 310 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 311 | num_fills = 0; |
| 312 | num_flats = 0; |
| 313 | |
| 314 | for ( fill_type = 0; fill_type < AF_CJK_BLUE_TYPE_MAX; fill_type++ ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 315 | { |
| 316 | const FT_ULong* p = blue_chars[bb][fill_type]; |
| 317 | const FT_ULong* limit = p + AF_CJK_MAX_TEST_CHARACTERS; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 318 | FT_Bool fill = FT_BOOL( |
| 319 | fill_type == AF_CJK_BLUE_TYPE_FILL ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 320 | |
| 321 | |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 322 | FT_TRACE5(( "cjk blue %s/%s\n", cjk_blue_name[bb], |
| 323 | cjk_blue_type_name[fill_type] )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 324 | |
| 325 | |
| 326 | for ( ; p < limit && *p; p++ ) |
| 327 | { |
| 328 | FT_UInt glyph_index; |
| 329 | FT_Pos best_pos; /* same as points.y */ |
Werner Lemberg | 71cc1a8 | 2011-05-30 07:20:37 +0200 | [diff] [blame] | 330 | FT_Int best_point; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 331 | FT_Vector* points; |
| 332 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 333 | |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 334 | FT_TRACE5(( " U+%lX...", *p )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 335 | |
| 336 | /* load the character in the face -- skip unknown or empty ones */ |
| 337 | glyph_index = FT_Get_Char_Index( face, *p ); |
| 338 | if ( glyph_index == 0 ) |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 339 | { |
| 340 | FT_TRACE5(( "unavailable\n" )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 341 | continue; |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 342 | } |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 343 | |
| 344 | error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE ); |
| 345 | if ( error || glyph->outline.n_points <= 0 ) |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 346 | { |
| 347 | FT_TRACE5(( "no outline\n" )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 348 | continue; |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 349 | } |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 350 | |
| 351 | /* now compute min or max point indices and coordinates */ |
| 352 | points = glyph->outline.points; |
| 353 | best_point = -1; |
| 354 | best_pos = 0; /* make compiler happy */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 355 | |
| 356 | { |
| 357 | FT_Int nn; |
| 358 | FT_Int first = 0; |
| 359 | FT_Int last = -1; |
| 360 | |
| 361 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 362 | for ( nn = 0; |
| 363 | nn < glyph->outline.n_contours; |
| 364 | first = last + 1, nn++ ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 365 | { |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 366 | FT_Int pp; |
| 367 | |
| 368 | |
| 369 | last = glyph->outline.contours[nn]; |
| 370 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 371 | /* Avoid single-point contours since they are never */ |
| 372 | /* rasterized. In some fonts, they correspond to mark */ |
| 373 | /* attachment points which are way outside of the glyph's */ |
| 374 | /* real outline. */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 375 | if ( last <= first ) |
| 376 | continue; |
| 377 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 378 | switch ( bb ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 379 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 380 | case AF_CJK_BLUE_TOP: |
| 381 | for ( pp = first; pp <= last; pp++ ) |
| 382 | if ( best_point < 0 || points[pp].y > best_pos ) |
| 383 | { |
| 384 | best_point = pp; |
| 385 | best_pos = points[pp].y; |
| 386 | } |
| 387 | break; |
| 388 | |
| 389 | case AF_CJK_BLUE_BOTTOM: |
| 390 | for ( pp = first; pp <= last; pp++ ) |
| 391 | if ( best_point < 0 || points[pp].y < best_pos ) |
| 392 | { |
| 393 | best_point = pp; |
| 394 | best_pos = points[pp].y; |
| 395 | } |
| 396 | break; |
| 397 | |
| 398 | case AF_CJK_BLUE_LEFT: |
| 399 | for ( pp = first; pp <= last; pp++ ) |
| 400 | if ( best_point < 0 || points[pp].x < best_pos ) |
| 401 | { |
| 402 | best_point = pp; |
| 403 | best_pos = points[pp].x; |
| 404 | } |
| 405 | break; |
| 406 | |
| 407 | case AF_CJK_BLUE_RIGHT: |
| 408 | for ( pp = first; pp <= last; pp++ ) |
| 409 | if ( best_point < 0 || points[pp].x > best_pos ) |
| 410 | { |
| 411 | best_point = pp; |
| 412 | best_pos = points[pp].x; |
| 413 | } |
| 414 | break; |
| 415 | |
| 416 | default: |
| 417 | ; |
| 418 | } |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 419 | } |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 420 | FT_TRACE5(( "best_pos=%5ld\n", best_pos )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 421 | } |
| 422 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 423 | if ( fill ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 424 | fills[num_fills++] = best_pos; |
| 425 | else |
| 426 | flats[num_flats++] = best_pos; |
| 427 | } |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 428 | } |
| 429 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 430 | if ( num_flats == 0 && num_fills == 0 ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 431 | { |
| 432 | /* |
| 433 | * we couldn't find a single glyph to compute this blue zone, |
| 434 | * we will simply ignore it then |
| 435 | */ |
| 436 | FT_TRACE5(( "empty\n" )); |
| 437 | continue; |
| 438 | } |
| 439 | |
| 440 | /* we have computed the contents of the `fill' and `flats' tables, */ |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 441 | /* now determine the reference position of the blue -- */ |
| 442 | /* we simply take the median value after a simple sort */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 443 | af_sort_pos( num_flats, flats ); |
| 444 | af_sort_pos( num_fills, fills ); |
| 445 | |
| 446 | if ( AF_CJK_BLUE_TOP == bb || AF_CJK_BLUE_BOTTOM == bb ) |
| 447 | axis = &metrics->axis[AF_DIMENSION_VERT]; |
| 448 | else |
| 449 | axis = &metrics->axis[AF_DIMENSION_HORZ]; |
| 450 | |
| 451 | blue = & axis->blues[axis->blue_count]; |
| 452 | blue_ref = & blue->ref.org; |
| 453 | blue_shoot = & blue->shoot.org; |
| 454 | |
| 455 | axis->blue_count++; |
| 456 | if ( num_flats == 0 ) |
| 457 | { |
| 458 | *blue_ref = fills[num_fills / 2]; |
| 459 | *blue_shoot = fills[num_fills / 2]; |
| 460 | } |
| 461 | else if ( num_fills == 0 ) |
| 462 | { |
| 463 | *blue_ref = flats[num_flats / 2]; |
| 464 | *blue_shoot = flats[num_flats / 2]; |
| 465 | } |
| 466 | else |
| 467 | { |
| 468 | *blue_ref = fills[num_fills / 2]; |
| 469 | *blue_shoot = flats[num_flats / 2]; |
| 470 | } |
| 471 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 472 | /* make sure blue_ref >= blue_shoot for top/right or */ |
| 473 | /* vice versa for bottom/left */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 474 | if ( *blue_shoot != *blue_ref ) |
| 475 | { |
| 476 | FT_Pos ref = *blue_ref; |
| 477 | FT_Pos shoot = *blue_shoot; |
| 478 | FT_Bool under_ref = FT_BOOL( shoot < ref ); |
| 479 | |
| 480 | |
| 481 | if ( (AF_CJK_BLUE_TOP == bb || AF_CJK_BLUE_RIGHT == bb) ^ under_ref ) |
| 482 | *blue_shoot = *blue_ref = ( shoot + ref ) / 2; |
| 483 | } |
| 484 | |
| 485 | blue->flags = 0; |
| 486 | if ( AF_CJK_BLUE_TOP == bb ) |
| 487 | blue->flags |= AF_CJK_BLUE_IS_TOP; |
| 488 | else if ( AF_CJK_BLUE_RIGHT == bb ) |
| 489 | blue->flags |= AF_CJK_BLUE_IS_RIGHT; |
| 490 | |
sssa | 4e8f9de | 2011-05-12 14:30:15 +0900 | [diff] [blame] | 491 | FT_TRACE5(( "-- cjk %s bluezone ref = %ld shoot = %ld\n", |
| 492 | cjk_blue_name[bb], *blue_ref, *blue_shoot )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 493 | } |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 494 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 495 | return; |
| 496 | } |
| 497 | |
| 498 | |
| 499 | /* Basically the Latin version with type AF_CJKMetrics for metrics. */ |
| 500 | FT_LOCAL_DEF( void ) |
| 501 | af_cjk_metrics_check_digits( AF_CJKMetrics metrics, |
| 502 | FT_Face face ) |
| 503 | { |
| 504 | FT_UInt i; |
| 505 | FT_Bool started = 0, same_width = 1; |
| 506 | FT_Fixed advance, old_advance = 0; |
| 507 | |
| 508 | |
| 509 | /* check whether all ASCII digits have the same advance width; */ |
| 510 | /* digit `0' is 0x30 in all supported charmaps */ |
| 511 | for ( i = 0x30; i <= 0x39; i++ ) |
| 512 | { |
| 513 | FT_UInt glyph_index; |
| 514 | |
| 515 | |
| 516 | glyph_index = FT_Get_Char_Index( face, i ); |
| 517 | if ( glyph_index == 0 ) |
| 518 | continue; |
| 519 | |
| 520 | if ( FT_Get_Advance( face, glyph_index, |
| 521 | FT_LOAD_NO_SCALE | |
| 522 | FT_LOAD_NO_HINTING | |
| 523 | FT_LOAD_IGNORE_TRANSFORM, |
| 524 | &advance ) ) |
| 525 | continue; |
| 526 | |
| 527 | if ( started ) |
| 528 | { |
| 529 | if ( advance != old_advance ) |
| 530 | { |
| 531 | same_width = 0; |
| 532 | break; |
| 533 | } |
| 534 | } |
| 535 | else |
| 536 | { |
| 537 | old_advance = advance; |
| 538 | started = 1; |
| 539 | } |
| 540 | } |
| 541 | |
| 542 | metrics->root.digits_have_same_width = same_width; |
| 543 | } |
| 544 | |
| 545 | |
Werner Lemberg | 1e1b6df | 2007-07-07 07:30:40 +0000 | [diff] [blame] | 546 | FT_LOCAL_DEF( FT_Error ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 547 | af_cjk_metrics_init( AF_CJKMetrics metrics, |
| 548 | FT_Face face ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 549 | { |
| 550 | FT_CharMap oldmap = face->charmap; |
| 551 | |
| 552 | |
| 553 | metrics->units_per_em = face->units_per_EM; |
| 554 | |
Wu, Chia-I (吳佳一) | 4c507ff | 2006-02-11 13:22:37 +0000 | [diff] [blame] | 555 | if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) ) |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 556 | face->charmap = NULL; |
Werner Lemberg | 8b84c9d | 2009-04-27 19:40:35 +0200 | [diff] [blame] | 557 | else |
| 558 | { |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 559 | af_cjk_metrics_init_widths( metrics, face, 0x7530 ); |
| 560 | af_cjk_metrics_init_blues( metrics, face, af_cjk_hani_blue_chars ); |
| 561 | af_cjk_metrics_check_digits( metrics, face ); |
Werner Lemberg | 8b84c9d | 2009-04-27 19:40:35 +0200 | [diff] [blame] | 562 | } |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 563 | |
| 564 | FT_Set_Charmap( face, oldmap ); |
| 565 | |
| 566 | return AF_Err_Ok; |
| 567 | } |
| 568 | |
| 569 | |
| 570 | static void |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 571 | af_cjk_metrics_scale_dim( AF_CJKMetrics metrics, |
| 572 | AF_Scaler scaler, |
| 573 | AF_Dimension dim ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 574 | { |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 575 | FT_Fixed scale; |
| 576 | FT_Pos delta; |
| 577 | AF_CJKAxis axis; |
| 578 | FT_UInt nn; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 579 | |
| 580 | |
| 581 | axis = &metrics->axis[dim]; |
| 582 | |
| 583 | if ( dim == AF_DIMENSION_HORZ ) |
| 584 | { |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 585 | scale = scaler->x_scale; |
| 586 | delta = scaler->x_delta; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 587 | } |
| 588 | else |
| 589 | { |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 590 | scale = scaler->y_scale; |
| 591 | delta = scaler->y_delta; |
| 592 | } |
| 593 | |
| 594 | if ( axis->org_scale == scale && axis->org_delta == delta ) |
| 595 | return; |
| 596 | |
| 597 | axis->org_scale = scale; |
| 598 | axis->org_delta = delta; |
| 599 | |
| 600 | axis->scale = scale; |
| 601 | axis->delta = delta; |
| 602 | |
| 603 | /* scale the blue zones */ |
| 604 | for ( nn = 0; nn < axis->blue_count; nn++ ) |
| 605 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 606 | AF_CJKBlue blue = &axis->blues[nn]; |
| 607 | FT_Pos dist; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 608 | |
| 609 | |
| 610 | blue->ref.cur = FT_MulFix( blue->ref.org, scale ) + delta; |
| 611 | blue->ref.fit = blue->ref.cur; |
| 612 | blue->shoot.cur = FT_MulFix( blue->shoot.org, scale ) + delta; |
| 613 | blue->shoot.fit = blue->shoot.cur; |
| 614 | blue->flags &= ~AF_CJK_BLUE_ACTIVE; |
| 615 | |
| 616 | /* a blue zone is only active if it is less than 3/4 pixels tall */ |
| 617 | dist = FT_MulFix( blue->ref.org - blue->shoot.org, scale ); |
| 618 | if ( dist <= 48 && dist >= -48 ) |
| 619 | { |
| 620 | FT_Pos delta1, delta2; |
| 621 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 622 | |
| 623 | blue->ref.fit = FT_PIX_ROUND( blue->ref.cur ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 624 | |
| 625 | /* shoot is under shoot for cjk */ |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 626 | delta1 = FT_DivFix( blue->ref.fit, scale ) - blue->shoot.org; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 627 | delta2 = delta1; |
| 628 | if ( delta1 < 0 ) |
| 629 | delta2 = -delta2; |
| 630 | |
| 631 | delta2 = FT_MulFix( delta2, scale ); |
| 632 | |
| 633 | FT_TRACE5(( "delta: %d", delta1 )); |
| 634 | if ( delta2 < 32 ) |
| 635 | delta2 = 0; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 636 | #if 0 |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 637 | else if ( delta2 < 64 ) |
| 638 | delta2 = 32 + ( ( ( delta2 - 32 ) + 16 ) & ~31 ); |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 639 | #endif |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 640 | else |
| 641 | delta2 = FT_PIX_ROUND( delta2 ); |
| 642 | FT_TRACE5(( "/%d\n", delta2 )); |
| 643 | |
| 644 | if ( delta1 < 0 ) |
| 645 | delta2 = -delta2; |
| 646 | |
| 647 | blue->shoot.fit = blue->ref.fit - delta2; |
| 648 | |
| 649 | FT_TRACE5(( ">> active cjk blue zone %c%d[%ld/%ld]: " |
| 650 | "ref: cur=%.2f fit=%.2f shoot: cur=%.2f fit=%.2f\n", |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 651 | ( dim == AF_DIMENSION_HORZ ) ? 'H' : 'V', |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 652 | nn, blue->ref.org, blue->shoot.org, |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 653 | blue->ref.cur / 64.0, blue->ref.fit / 64.0, |
| 654 | blue->shoot.cur / 64.0, blue->shoot.fit / 64.0 )); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 655 | |
| 656 | blue->flags |= AF_CJK_BLUE_ACTIVE; |
| 657 | } |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 658 | } |
| 659 | } |
| 660 | |
| 661 | |
Werner Lemberg | 1e1b6df | 2007-07-07 07:30:40 +0000 | [diff] [blame] | 662 | FT_LOCAL_DEF( void ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 663 | af_cjk_metrics_scale( AF_CJKMetrics metrics, |
| 664 | AF_Scaler scaler ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 665 | { |
| 666 | metrics->root.scaler = *scaler; |
| 667 | |
| 668 | af_cjk_metrics_scale_dim( metrics, scaler, AF_DIMENSION_HORZ ); |
| 669 | af_cjk_metrics_scale_dim( metrics, scaler, AF_DIMENSION_VERT ); |
| 670 | } |
| 671 | |
| 672 | |
| 673 | /*************************************************************************/ |
| 674 | /*************************************************************************/ |
| 675 | /***** *****/ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 676 | /***** C J K G L Y P H A N A L Y S I S *****/ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 677 | /***** *****/ |
| 678 | /*************************************************************************/ |
| 679 | /*************************************************************************/ |
| 680 | |
| 681 | static FT_Error |
| 682 | af_cjk_hints_compute_segments( AF_GlyphHints hints, |
| 683 | AF_Dimension dim ) |
| 684 | { |
| 685 | AF_AxisHints axis = &hints->axis[dim]; |
| 686 | AF_Segment segments = axis->segments; |
| 687 | AF_Segment segment_limit = segments + axis->num_segments; |
| 688 | FT_Error error; |
| 689 | AF_Segment seg; |
| 690 | |
| 691 | |
| 692 | error = af_latin_hints_compute_segments( hints, dim ); |
| 693 | if ( error ) |
| 694 | return error; |
| 695 | |
| 696 | /* a segment is round if it doesn't have successive */ |
| 697 | /* on-curve points. */ |
| 698 | for ( seg = segments; seg < segment_limit; seg++ ) |
| 699 | { |
| 700 | AF_Point pt = seg->first; |
| 701 | AF_Point last = seg->last; |
David Turner | 6c71c6b | 2006-02-25 12:49:40 +0000 | [diff] [blame] | 702 | AF_Flags f0 = (AF_Flags)(pt->flags & AF_FLAG_CONTROL); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 703 | AF_Flags f1; |
| 704 | |
| 705 | |
| 706 | seg->flags &= ~AF_EDGE_ROUND; |
| 707 | |
| 708 | for ( ; pt != last; f0 = f1 ) |
| 709 | { |
| 710 | pt = pt->next; |
David Turner | 6c71c6b | 2006-02-25 12:49:40 +0000 | [diff] [blame] | 711 | f1 = (AF_Flags)(pt->flags & AF_FLAG_CONTROL); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 712 | |
| 713 | if ( !f0 && !f1 ) |
| 714 | break; |
| 715 | |
| 716 | if ( pt == last ) |
| 717 | seg->flags |= AF_EDGE_ROUND; |
| 718 | } |
| 719 | } |
| 720 | |
| 721 | return AF_Err_Ok; |
| 722 | } |
| 723 | |
| 724 | |
| 725 | static void |
| 726 | af_cjk_hints_link_segments( AF_GlyphHints hints, |
| 727 | AF_Dimension dim ) |
| 728 | { |
| 729 | AF_AxisHints axis = &hints->axis[dim]; |
| 730 | AF_Segment segments = axis->segments; |
| 731 | AF_Segment segment_limit = segments + axis->num_segments; |
| 732 | AF_Direction major_dir = axis->major_dir; |
| 733 | AF_Segment seg1, seg2; |
David Turner | da95af6 | 2006-03-20 13:32:33 +0000 | [diff] [blame] | 734 | FT_Pos len_threshold; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 735 | FT_Pos dist_threshold; |
| 736 | |
| 737 | |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 738 | len_threshold = AF_LATIN_CONSTANT( hints->metrics, 8 ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 739 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 740 | dist_threshold = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale |
| 741 | : hints->y_scale; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 742 | dist_threshold = FT_DivFix( 64 * 3, dist_threshold ); |
| 743 | |
| 744 | /* now compare each segment to the others */ |
| 745 | for ( seg1 = segments; seg1 < segment_limit; seg1++ ) |
| 746 | { |
| 747 | /* the fake segments are for metrics hinting only */ |
| 748 | if ( seg1->first == seg1->last ) |
| 749 | continue; |
| 750 | |
| 751 | if ( seg1->dir != major_dir ) |
| 752 | continue; |
| 753 | |
| 754 | for ( seg2 = segments; seg2 < segment_limit; seg2++ ) |
| 755 | if ( seg2 != seg1 && seg1->dir + seg2->dir == 0 ) |
| 756 | { |
| 757 | FT_Pos dist = seg2->pos - seg1->pos; |
| 758 | |
| 759 | |
| 760 | if ( dist < 0 ) |
| 761 | continue; |
| 762 | |
| 763 | { |
| 764 | FT_Pos min = seg1->min_coord; |
| 765 | FT_Pos max = seg1->max_coord; |
| 766 | FT_Pos len; |
| 767 | |
| 768 | |
| 769 | if ( min < seg2->min_coord ) |
| 770 | min = seg2->min_coord; |
| 771 | |
| 772 | if ( max > seg2->max_coord ) |
| 773 | max = seg2->max_coord; |
| 774 | |
| 775 | len = max - min; |
| 776 | if ( len >= len_threshold ) |
| 777 | { |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 778 | if ( dist * 8 < seg1->score * 9 && |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 779 | ( dist * 8 < seg1->score * 7 || seg1->len < len ) ) |
| 780 | { |
| 781 | seg1->score = dist; |
| 782 | seg1->len = len; |
| 783 | seg1->link = seg2; |
| 784 | } |
| 785 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 786 | if ( dist * 8 < seg2->score * 9 && |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 787 | ( dist * 8 < seg2->score * 7 || seg2->len < len ) ) |
| 788 | { |
| 789 | seg2->score = dist; |
| 790 | seg2->len = len; |
| 791 | seg2->link = seg1; |
| 792 | } |
| 793 | } |
| 794 | } |
| 795 | } |
| 796 | } |
| 797 | |
| 798 | /* |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 799 | * now compute the `serif' segments |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 800 | * |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 801 | * In Hanzi, some strokes are wider on one or both of the ends. |
| 802 | * We either identify the stems on the ends as serifs or remove |
| 803 | * the linkage, depending on the length of the stems. |
| 804 | * |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 805 | */ |
| 806 | |
| 807 | { |
| 808 | AF_Segment link1, link2; |
| 809 | |
| 810 | |
| 811 | for ( seg1 = segments; seg1 < segment_limit; seg1++ ) |
| 812 | { |
| 813 | link1 = seg1->link; |
| 814 | if ( !link1 || link1->link != seg1 || link1->pos <= seg1->pos ) |
| 815 | continue; |
| 816 | |
| 817 | if ( seg1->score >= dist_threshold ) |
| 818 | continue; |
| 819 | |
| 820 | for ( seg2 = segments; seg2 < segment_limit; seg2++ ) |
| 821 | { |
| 822 | if ( seg2->pos > seg1->pos || seg1 == seg2 ) |
| 823 | continue; |
| 824 | |
| 825 | link2 = seg2->link; |
| 826 | if ( !link2 || link2->link != seg2 || link2->pos < link1->pos ) |
| 827 | continue; |
| 828 | |
| 829 | if ( seg1->pos == seg2->pos && link1->pos == link2->pos ) |
| 830 | continue; |
| 831 | |
| 832 | if ( seg2->score <= seg1->score || seg1->score * 4 <= seg2->score ) |
| 833 | continue; |
| 834 | |
| 835 | /* seg2 < seg1 < link1 < link2 */ |
| 836 | |
| 837 | if ( seg1->len >= seg2->len * 3 ) |
| 838 | { |
| 839 | AF_Segment seg; |
| 840 | |
| 841 | |
| 842 | for ( seg = segments; seg < segment_limit; seg++ ) |
| 843 | { |
| 844 | AF_Segment link = seg->link; |
| 845 | |
| 846 | |
| 847 | if ( link == seg2 ) |
| 848 | { |
| 849 | seg->link = 0; |
| 850 | seg->serif = link1; |
| 851 | } |
| 852 | else if ( link == link2 ) |
| 853 | { |
| 854 | seg->link = 0; |
| 855 | seg->serif = seg1; |
| 856 | } |
| 857 | } |
| 858 | } |
| 859 | else |
| 860 | { |
| 861 | seg1->link = link1->link = 0; |
| 862 | |
| 863 | break; |
| 864 | } |
| 865 | } |
| 866 | } |
| 867 | } |
| 868 | |
| 869 | for ( seg1 = segments; seg1 < segment_limit; seg1++ ) |
| 870 | { |
| 871 | seg2 = seg1->link; |
| 872 | |
| 873 | if ( seg2 ) |
| 874 | { |
| 875 | seg2->num_linked++; |
| 876 | if ( seg2->link != seg1 ) |
| 877 | { |
| 878 | seg1->link = 0; |
| 879 | |
| 880 | if ( seg2->score < dist_threshold || seg1->score < seg2->score * 4 ) |
| 881 | seg1->serif = seg2->link; |
| 882 | else |
| 883 | seg2->num_linked--; |
| 884 | } |
| 885 | } |
| 886 | } |
| 887 | } |
| 888 | |
| 889 | |
| 890 | static FT_Error |
| 891 | af_cjk_hints_compute_edges( AF_GlyphHints hints, |
| 892 | AF_Dimension dim ) |
| 893 | { |
| 894 | AF_AxisHints axis = &hints->axis[dim]; |
| 895 | FT_Error error = AF_Err_Ok; |
| 896 | FT_Memory memory = hints->memory; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 897 | AF_CJKAxis laxis = &((AF_CJKMetrics)hints->metrics)->axis[dim]; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 898 | |
| 899 | AF_Segment segments = axis->segments; |
| 900 | AF_Segment segment_limit = segments + axis->num_segments; |
| 901 | AF_Segment seg; |
| 902 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 903 | FT_Fixed scale; |
| 904 | FT_Pos edge_distance_threshold; |
| 905 | |
| 906 | |
| 907 | axis->num_edges = 0; |
| 908 | |
| 909 | scale = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale |
| 910 | : hints->y_scale; |
| 911 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 912 | /*********************************************************************/ |
| 913 | /* */ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 914 | /* We begin by generating a sorted table of edges for the current */ |
| 915 | /* direction. To do so, we simply scan each segment and try to find */ |
| 916 | /* an edge in our table that corresponds to its position. */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 917 | /* */ |
| 918 | /* If no edge is found, we create and insert a new edge in the */ |
| 919 | /* sorted table. Otherwise, we simply add the segment to the edge's */ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 920 | /* list which is then processed in the second step to compute the */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 921 | /* edge's properties. */ |
| 922 | /* */ |
| 923 | /* Note that the edges table is sorted along the segment/edge */ |
| 924 | /* position. */ |
| 925 | /* */ |
| 926 | /*********************************************************************/ |
| 927 | |
| 928 | edge_distance_threshold = FT_MulFix( laxis->edge_distance_threshold, |
| 929 | scale ); |
| 930 | if ( edge_distance_threshold > 64 / 4 ) |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 931 | edge_distance_threshold = FT_DivFix( 64 / 4, scale ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 932 | else |
| 933 | edge_distance_threshold = laxis->edge_distance_threshold; |
| 934 | |
| 935 | for ( seg = segments; seg < segment_limit; seg++ ) |
| 936 | { |
| 937 | AF_Edge found = 0; |
| 938 | FT_Pos best = 0xFFFFU; |
| 939 | FT_Int ee; |
| 940 | |
| 941 | |
| 942 | /* look for an edge corresponding to the segment */ |
| 943 | for ( ee = 0; ee < axis->num_edges; ee++ ) |
| 944 | { |
| 945 | AF_Edge edge = axis->edges + ee; |
| 946 | FT_Pos dist; |
| 947 | |
| 948 | |
| 949 | if ( edge->dir != seg->dir ) |
| 950 | continue; |
| 951 | |
| 952 | dist = seg->pos - edge->fpos; |
| 953 | if ( dist < 0 ) |
| 954 | dist = -dist; |
| 955 | |
| 956 | if ( dist < edge_distance_threshold && dist < best ) |
| 957 | { |
| 958 | AF_Segment link = seg->link; |
| 959 | |
| 960 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 961 | /* check whether all linked segments of the candidate edge */ |
| 962 | /* can make a single edge. */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 963 | if ( link ) |
| 964 | { |
| 965 | AF_Segment seg1 = edge->first; |
| 966 | AF_Segment link1; |
| 967 | FT_Pos dist2 = 0; |
| 968 | |
| 969 | |
| 970 | do |
| 971 | { |
| 972 | link1 = seg1->link; |
| 973 | if ( link1 ) |
| 974 | { |
| 975 | dist2 = AF_SEGMENT_DIST( link, link1 ); |
| 976 | if ( dist2 >= edge_distance_threshold ) |
| 977 | break; |
| 978 | } |
| 979 | |
| 980 | } while ( ( seg1 = seg1->edge_next ) != edge->first ); |
| 981 | |
| 982 | if ( dist2 >= edge_distance_threshold ) |
| 983 | continue; |
| 984 | } |
| 985 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 986 | best = dist; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 987 | found = edge; |
| 988 | } |
| 989 | } |
| 990 | |
| 991 | if ( !found ) |
| 992 | { |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 993 | AF_Edge edge; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 994 | |
| 995 | |
| 996 | /* insert a new edge in the list and */ |
| 997 | /* sort according to the position */ |
Werner Lemberg | 1e1b6df | 2007-07-07 07:30:40 +0000 | [diff] [blame] | 998 | error = af_axis_hints_new_edge( axis, seg->pos, |
| 999 | (AF_Direction)seg->dir, |
| 1000 | memory, &edge ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1001 | if ( error ) |
| 1002 | goto Exit; |
| 1003 | |
| 1004 | /* add the segment to the new edge's list */ |
| 1005 | FT_ZERO( edge ); |
| 1006 | |
| 1007 | edge->first = seg; |
| 1008 | edge->last = seg; |
| 1009 | edge->fpos = seg->pos; |
| 1010 | edge->opos = edge->pos = FT_MulFix( seg->pos, scale ); |
| 1011 | seg->edge_next = seg; |
| 1012 | edge->dir = seg->dir; |
| 1013 | } |
| 1014 | else |
| 1015 | { |
| 1016 | /* if an edge was found, simply add the segment to the edge's */ |
| 1017 | /* list */ |
| 1018 | seg->edge_next = found->first; |
| 1019 | found->last->edge_next = seg; |
| 1020 | found->last = seg; |
| 1021 | } |
| 1022 | } |
| 1023 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1024 | /*********************************************************************/ |
| 1025 | /* */ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1026 | /* Good, we now compute each edge's properties according to segments */ |
| 1027 | /* found on its position. Basically, these are as follows. */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1028 | /* */ |
| 1029 | /* - edge's main direction */ |
| 1030 | /* - stem edge, serif edge or both (which defaults to stem then) */ |
| 1031 | /* - rounded edge, straight or both (which defaults to straight) */ |
| 1032 | /* - link for edge */ |
| 1033 | /* */ |
| 1034 | /*********************************************************************/ |
| 1035 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1036 | /* first of all, set the `edge' field in each segment -- this is */ |
| 1037 | /* required in order to compute edge links */ |
| 1038 | /* */ |
| 1039 | /* Note that removing this loop and setting the `edge' field of each */ |
| 1040 | /* segment directly in the code above slows down execution speed for */ |
| 1041 | /* some reasons on platforms like the Sun. */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1042 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1043 | { |
| 1044 | AF_Edge edges = axis->edges; |
| 1045 | AF_Edge edge_limit = edges + axis->num_edges; |
| 1046 | AF_Edge edge; |
| 1047 | |
| 1048 | |
| 1049 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1050 | { |
| 1051 | seg = edge->first; |
| 1052 | if ( seg ) |
| 1053 | do |
| 1054 | { |
| 1055 | seg->edge = edge; |
| 1056 | seg = seg->edge_next; |
| 1057 | |
| 1058 | } while ( seg != edge->first ); |
| 1059 | } |
| 1060 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1061 | /* now compute each edge properties */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1062 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1063 | { |
| 1064 | FT_Int is_round = 0; /* does it contain round segments? */ |
| 1065 | FT_Int is_straight = 0; /* does it contain straight segments? */ |
| 1066 | |
| 1067 | |
| 1068 | seg = edge->first; |
| 1069 | |
| 1070 | do |
| 1071 | { |
| 1072 | FT_Bool is_serif; |
| 1073 | |
| 1074 | |
| 1075 | /* check for roundness of segment */ |
| 1076 | if ( seg->flags & AF_EDGE_ROUND ) |
| 1077 | is_round++; |
| 1078 | else |
| 1079 | is_straight++; |
| 1080 | |
| 1081 | /* check for links -- if seg->serif is set, then seg->link must */ |
| 1082 | /* be ignored */ |
| 1083 | is_serif = (FT_Bool)( seg->serif && seg->serif->edge != edge ); |
| 1084 | |
| 1085 | if ( seg->link || is_serif ) |
| 1086 | { |
| 1087 | AF_Edge edge2; |
| 1088 | AF_Segment seg2; |
| 1089 | |
| 1090 | |
| 1091 | edge2 = edge->link; |
| 1092 | seg2 = seg->link; |
| 1093 | |
| 1094 | if ( is_serif ) |
| 1095 | { |
| 1096 | seg2 = seg->serif; |
| 1097 | edge2 = edge->serif; |
| 1098 | } |
| 1099 | |
| 1100 | if ( edge2 ) |
| 1101 | { |
| 1102 | FT_Pos edge_delta; |
| 1103 | FT_Pos seg_delta; |
| 1104 | |
| 1105 | |
| 1106 | edge_delta = edge->fpos - edge2->fpos; |
| 1107 | if ( edge_delta < 0 ) |
| 1108 | edge_delta = -edge_delta; |
| 1109 | |
| 1110 | seg_delta = AF_SEGMENT_DIST( seg, seg2 ); |
| 1111 | |
| 1112 | if ( seg_delta < edge_delta ) |
| 1113 | edge2 = seg2->edge; |
| 1114 | } |
| 1115 | else |
| 1116 | edge2 = seg2->edge; |
| 1117 | |
| 1118 | if ( is_serif ) |
| 1119 | { |
| 1120 | edge->serif = edge2; |
| 1121 | edge2->flags |= AF_EDGE_SERIF; |
| 1122 | } |
| 1123 | else |
| 1124 | edge->link = edge2; |
| 1125 | } |
| 1126 | |
| 1127 | seg = seg->edge_next; |
| 1128 | |
| 1129 | } while ( seg != edge->first ); |
| 1130 | |
| 1131 | /* set the round/straight flags */ |
| 1132 | edge->flags = AF_EDGE_NORMAL; |
| 1133 | |
| 1134 | if ( is_round > 0 && is_round >= is_straight ) |
| 1135 | edge->flags |= AF_EDGE_ROUND; |
| 1136 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1137 | /* get rid of serifs if link is set */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1138 | /* XXX: This gets rid of many unpleasant artefacts! */ |
| 1139 | /* Example: the `c' in cour.pfa at size 13 */ |
| 1140 | |
| 1141 | if ( edge->serif && edge->link ) |
| 1142 | edge->serif = 0; |
| 1143 | } |
| 1144 | } |
| 1145 | |
| 1146 | Exit: |
| 1147 | return error; |
| 1148 | } |
| 1149 | |
| 1150 | |
| 1151 | static FT_Error |
| 1152 | af_cjk_hints_detect_features( AF_GlyphHints hints, |
| 1153 | AF_Dimension dim ) |
| 1154 | { |
| 1155 | FT_Error error; |
| 1156 | |
| 1157 | |
| 1158 | error = af_cjk_hints_compute_segments( hints, dim ); |
| 1159 | if ( !error ) |
| 1160 | { |
| 1161 | af_cjk_hints_link_segments( hints, dim ); |
| 1162 | |
| 1163 | error = af_cjk_hints_compute_edges( hints, dim ); |
| 1164 | } |
| 1165 | return error; |
| 1166 | } |
| 1167 | |
| 1168 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1169 | FT_LOCAL_DEF( void ) |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1170 | af_cjk_hints_compute_blue_edges( AF_GlyphHints hints, |
| 1171 | AF_CJKMetrics metrics, |
| 1172 | AF_Dimension dim ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1173 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1174 | AF_AxisHints axis = &hints->axis[dim]; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1175 | AF_Edge edge = axis->edges; |
| 1176 | AF_Edge edge_limit = edge + axis->num_edges; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1177 | AF_CJKAxis cjk = &metrics->axis[dim]; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1178 | FT_Fixed scale = cjk->scale; |
| 1179 | FT_Pos best_dist0; /* initial threshold */ |
| 1180 | |
| 1181 | |
| 1182 | /* compute the initial threshold as a fraction of the EM size */ |
| 1183 | best_dist0 = FT_MulFix( metrics->units_per_em / 40, scale ); |
| 1184 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1185 | if ( best_dist0 > 64 / 2 ) /* maximum 1/2 pixel */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1186 | best_dist0 = 64 / 2; |
| 1187 | |
| 1188 | /* compute which blue zones are active, i.e. have their scaled */ |
| 1189 | /* size < 3/4 pixels */ |
| 1190 | |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1191 | /* If the distant between an edge and a blue zone is shorter than */ |
| 1192 | /* best_dist0, set the blue zone for the edge. Then search for */ |
| 1193 | /* the blue zone with the smallest best_dist to the edge. */ |
| 1194 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1195 | for ( ; edge < edge_limit; edge++ ) |
| 1196 | { |
| 1197 | FT_UInt bb; |
| 1198 | AF_Width best_blue = NULL; |
| 1199 | FT_Pos best_dist = best_dist0; |
| 1200 | |
| 1201 | |
| 1202 | for ( bb = 0; bb < cjk->blue_count; bb++ ) |
| 1203 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1204 | AF_CJKBlue blue = cjk->blues + bb; |
| 1205 | FT_Bool is_top_right_blue, is_major_dir; |
| 1206 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1207 | |
| 1208 | /* skip inactive blue zones (i.e., those that are too small) */ |
| 1209 | if ( !( blue->flags & AF_CJK_BLUE_ACTIVE ) ) |
| 1210 | continue; |
| 1211 | |
| 1212 | /* if it is a top zone, check for right edges -- if it is a bottom */ |
| 1213 | /* zone, check for left edges */ |
| 1214 | /* */ |
| 1215 | /* of course, that's for TrueType */ |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1216 | is_top_right_blue = |
| 1217 | FT_BOOL( ( ( blue->flags & AF_CJK_BLUE_IS_TOP ) != 0 ) || |
| 1218 | ( ( blue->flags & AF_CJK_BLUE_IS_RIGHT ) != 0 ) ); |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1219 | is_major_dir = FT_BOOL( edge->dir == axis->major_dir ); |
| 1220 | |
| 1221 | /* if it is a top zone, the edge must be against the major */ |
| 1222 | /* direction; if it is a bottom zone, it must be in the major */ |
| 1223 | /* direction */ |
| 1224 | if ( is_top_right_blue ^ is_major_dir ) |
| 1225 | { |
| 1226 | FT_Pos dist; |
| 1227 | AF_Width compare; |
| 1228 | |
| 1229 | |
| 1230 | /* Compare the edge to the closest blue zone type */ |
| 1231 | if ( FT_ABS( edge->fpos - blue->ref.org ) > |
| 1232 | FT_ABS( edge->fpos - blue->shoot.org ) ) |
| 1233 | compare = &blue->shoot; |
| 1234 | else |
| 1235 | compare = &blue->ref; |
| 1236 | |
| 1237 | dist = edge->fpos - compare->org; |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1238 | if ( dist < 0 ) |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1239 | dist = -dist; |
| 1240 | |
| 1241 | dist = FT_MulFix( dist, scale ); |
| 1242 | if ( dist < best_dist ) |
| 1243 | { |
| 1244 | best_dist = dist; |
| 1245 | best_blue = compare; |
| 1246 | } |
| 1247 | } |
| 1248 | } |
| 1249 | |
| 1250 | if ( best_blue ) |
| 1251 | edge->blue_edge = best_blue; |
| 1252 | } |
| 1253 | } |
| 1254 | |
| 1255 | |
Werner Lemberg | 1e1b6df | 2007-07-07 07:30:40 +0000 | [diff] [blame] | 1256 | FT_LOCAL_DEF( FT_Error ) |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1257 | af_cjk_hints_init( AF_GlyphHints hints, |
| 1258 | AF_CJKMetrics metrics ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1259 | { |
| 1260 | FT_Render_Mode mode; |
| 1261 | FT_UInt32 scaler_flags, other_flags; |
| 1262 | |
| 1263 | |
| 1264 | af_glyph_hints_rescale( hints, (AF_ScriptMetrics)metrics ); |
| 1265 | |
| 1266 | /* |
| 1267 | * correct x_scale and y_scale when needed, since they may have |
| 1268 | * been modified af_cjk_scale_dim above |
| 1269 | */ |
| 1270 | hints->x_scale = metrics->axis[AF_DIMENSION_HORZ].scale; |
| 1271 | hints->x_delta = metrics->axis[AF_DIMENSION_HORZ].delta; |
| 1272 | hints->y_scale = metrics->axis[AF_DIMENSION_VERT].scale; |
| 1273 | hints->y_delta = metrics->axis[AF_DIMENSION_VERT].delta; |
| 1274 | |
| 1275 | /* compute flags depending on render mode, etc. */ |
| 1276 | mode = metrics->root.scaler.render_mode; |
| 1277 | |
Werner Lemberg | 576fc2c | 2011-03-02 03:52:36 +0100 | [diff] [blame] | 1278 | #ifdef AF_CONFIG_OPTION_USE_WARPER |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1279 | if ( mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1280 | metrics->root.scaler.render_mode = mode = FT_RENDER_MODE_NORMAL; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1281 | #endif |
| 1282 | |
| 1283 | scaler_flags = hints->scaler_flags; |
| 1284 | other_flags = 0; |
| 1285 | |
| 1286 | /* |
| 1287 | * We snap the width of vertical stems for the monochrome and |
| 1288 | * horizontal LCD rendering targets only. |
| 1289 | */ |
| 1290 | if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD ) |
| 1291 | other_flags |= AF_LATIN_HINTS_HORZ_SNAP; |
| 1292 | |
| 1293 | /* |
| 1294 | * We snap the width of horizontal stems for the monochrome and |
| 1295 | * vertical LCD rendering targets only. |
| 1296 | */ |
| 1297 | if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD_V ) |
| 1298 | other_flags |= AF_LATIN_HINTS_VERT_SNAP; |
| 1299 | |
| 1300 | /* |
| 1301 | * We adjust stems to full pixels only if we don't use the `light' mode. |
| 1302 | */ |
| 1303 | if ( mode != FT_RENDER_MODE_LIGHT ) |
| 1304 | other_flags |= AF_LATIN_HINTS_STEM_ADJUST; |
| 1305 | |
| 1306 | if ( mode == FT_RENDER_MODE_MONO ) |
| 1307 | other_flags |= AF_LATIN_HINTS_MONO; |
| 1308 | |
| 1309 | scaler_flags |= AF_SCALER_FLAG_NO_ADVANCE; |
| 1310 | |
| 1311 | hints->scaler_flags = scaler_flags; |
| 1312 | hints->other_flags = other_flags; |
| 1313 | |
| 1314 | return 0; |
| 1315 | } |
| 1316 | |
| 1317 | |
| 1318 | /*************************************************************************/ |
| 1319 | /*************************************************************************/ |
| 1320 | /***** *****/ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1321 | /***** C J K G L Y P H G R I D - F I T T I N G *****/ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1322 | /***** *****/ |
| 1323 | /*************************************************************************/ |
| 1324 | /*************************************************************************/ |
| 1325 | |
| 1326 | /* snap a given width in scaled coordinates to one of the */ |
| 1327 | /* current standard widths */ |
| 1328 | |
| 1329 | static FT_Pos |
| 1330 | af_cjk_snap_width( AF_Width widths, |
| 1331 | FT_Int count, |
| 1332 | FT_Pos width ) |
| 1333 | { |
| 1334 | int n; |
| 1335 | FT_Pos best = 64 + 32 + 2; |
| 1336 | FT_Pos reference = width; |
| 1337 | FT_Pos scaled; |
| 1338 | |
| 1339 | |
| 1340 | for ( n = 0; n < count; n++ ) |
| 1341 | { |
| 1342 | FT_Pos w; |
| 1343 | FT_Pos dist; |
| 1344 | |
| 1345 | |
| 1346 | w = widths[n].cur; |
| 1347 | dist = width - w; |
| 1348 | if ( dist < 0 ) |
| 1349 | dist = -dist; |
| 1350 | if ( dist < best ) |
| 1351 | { |
| 1352 | best = dist; |
| 1353 | reference = w; |
| 1354 | } |
| 1355 | } |
| 1356 | |
| 1357 | scaled = FT_PIX_ROUND( reference ); |
| 1358 | |
| 1359 | if ( width >= reference ) |
| 1360 | { |
| 1361 | if ( width < scaled + 48 ) |
| 1362 | width = reference; |
| 1363 | } |
| 1364 | else |
| 1365 | { |
| 1366 | if ( width > scaled - 48 ) |
| 1367 | width = reference; |
| 1368 | } |
| 1369 | |
| 1370 | return width; |
| 1371 | } |
| 1372 | |
| 1373 | |
| 1374 | /* compute the snapped width of a given stem */ |
| 1375 | |
| 1376 | static FT_Pos |
| 1377 | af_cjk_compute_stem_width( AF_GlyphHints hints, |
| 1378 | AF_Dimension dim, |
| 1379 | FT_Pos width, |
| 1380 | AF_Edge_Flags base_flags, |
| 1381 | AF_Edge_Flags stem_flags ) |
| 1382 | { |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 1383 | AF_CJKMetrics metrics = (AF_CJKMetrics) hints->metrics; |
| 1384 | AF_CJKAxis axis = & metrics->axis[dim]; |
| 1385 | FT_Pos dist = width; |
| 1386 | FT_Int sign = 0; |
| 1387 | FT_Bool vertical = FT_BOOL( dim == AF_DIMENSION_VERT ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1388 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1389 | FT_UNUSED( base_flags ); |
| 1390 | FT_UNUSED( stem_flags ); |
| 1391 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1392 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1393 | if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) |
| 1394 | return width; |
| 1395 | |
| 1396 | if ( dist < 0 ) |
| 1397 | { |
| 1398 | dist = -width; |
| 1399 | sign = 1; |
| 1400 | } |
| 1401 | |
| 1402 | if ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || |
| 1403 | ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) ) |
| 1404 | { |
| 1405 | /* smooth hinting process: very lightly quantize the stem width */ |
| 1406 | |
| 1407 | if ( axis->width_count > 0 ) |
| 1408 | { |
| 1409 | if ( FT_ABS( dist - axis->widths[0].cur ) < 40 ) |
| 1410 | { |
| 1411 | dist = axis->widths[0].cur; |
| 1412 | if ( dist < 48 ) |
| 1413 | dist = 48; |
| 1414 | |
| 1415 | goto Done_Width; |
| 1416 | } |
| 1417 | } |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1418 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1419 | if ( dist < 54 ) |
| 1420 | dist += ( 54 - dist ) / 2 ; |
| 1421 | else if ( dist < 3 * 64 ) |
| 1422 | { |
| 1423 | FT_Pos delta; |
| 1424 | |
| 1425 | |
| 1426 | delta = dist & 63; |
| 1427 | dist &= -64; |
| 1428 | |
| 1429 | if ( delta < 10 ) |
| 1430 | dist += delta; |
| 1431 | else if ( delta < 22 ) |
| 1432 | dist += 10; |
| 1433 | else if ( delta < 42 ) |
| 1434 | dist += delta; |
| 1435 | else if ( delta < 54 ) |
| 1436 | dist += 54; |
| 1437 | else |
| 1438 | dist += delta; |
| 1439 | } |
| 1440 | } |
| 1441 | else |
| 1442 | { |
| 1443 | /* strong hinting process: snap the stem width to integer pixels */ |
| 1444 | |
| 1445 | dist = af_cjk_snap_width( axis->widths, axis->width_count, dist ); |
| 1446 | |
| 1447 | if ( vertical ) |
| 1448 | { |
| 1449 | /* in the case of vertical hinting, always round */ |
| 1450 | /* the stem heights to integer pixels */ |
| 1451 | |
| 1452 | if ( dist >= 64 ) |
| 1453 | dist = ( dist + 16 ) & ~63; |
| 1454 | else |
| 1455 | dist = 64; |
| 1456 | } |
| 1457 | else |
| 1458 | { |
| 1459 | if ( AF_LATIN_HINTS_DO_MONO( hints ) ) |
| 1460 | { |
| 1461 | /* monochrome horizontal hinting: snap widths to integer pixels */ |
| 1462 | /* with a different threshold */ |
| 1463 | |
| 1464 | if ( dist < 64 ) |
| 1465 | dist = 64; |
| 1466 | else |
| 1467 | dist = ( dist + 32 ) & ~63; |
| 1468 | } |
| 1469 | else |
| 1470 | { |
| 1471 | /* for horizontal anti-aliased hinting, we adopt a more subtle */ |
| 1472 | /* approach: we strengthen small stems, round stems whose size */ |
| 1473 | /* is between 1 and 2 pixels to an integer, otherwise nothing */ |
| 1474 | |
| 1475 | if ( dist < 48 ) |
| 1476 | dist = ( dist + 64 ) >> 1; |
| 1477 | |
| 1478 | else if ( dist < 128 ) |
| 1479 | dist = ( dist + 22 ) & ~63; |
| 1480 | else |
| 1481 | /* round otherwise to prevent color fringes in LCD mode */ |
| 1482 | dist = ( dist + 32 ) & ~63; |
| 1483 | } |
| 1484 | } |
| 1485 | } |
| 1486 | |
| 1487 | Done_Width: |
| 1488 | if ( sign ) |
| 1489 | dist = -dist; |
| 1490 | |
| 1491 | return dist; |
| 1492 | } |
| 1493 | |
| 1494 | |
| 1495 | /* align one stem edge relative to the previous stem edge */ |
| 1496 | |
| 1497 | static void |
| 1498 | af_cjk_align_linked_edge( AF_GlyphHints hints, |
| 1499 | AF_Dimension dim, |
| 1500 | AF_Edge base_edge, |
| 1501 | AF_Edge stem_edge ) |
| 1502 | { |
| 1503 | FT_Pos dist = stem_edge->opos - base_edge->opos; |
| 1504 | |
| 1505 | FT_Pos fitted_width = af_cjk_compute_stem_width( |
| 1506 | hints, dim, dist, |
| 1507 | (AF_Edge_Flags)base_edge->flags, |
| 1508 | (AF_Edge_Flags)stem_edge->flags ); |
| 1509 | |
| 1510 | |
| 1511 | stem_edge->pos = base_edge->pos + fitted_width; |
| 1512 | } |
| 1513 | |
| 1514 | |
| 1515 | static void |
| 1516 | af_cjk_align_serif_edge( AF_GlyphHints hints, |
| 1517 | AF_Edge base, |
| 1518 | AF_Edge serif ) |
| 1519 | { |
| 1520 | FT_UNUSED( hints ); |
| 1521 | |
| 1522 | serif->pos = base->pos + ( serif->opos - base->opos ); |
| 1523 | } |
| 1524 | |
| 1525 | |
| 1526 | /*************************************************************************/ |
| 1527 | /*************************************************************************/ |
| 1528 | /*************************************************************************/ |
| 1529 | /**** ****/ |
| 1530 | /**** E D G E H I N T I N G ****/ |
| 1531 | /**** ****/ |
| 1532 | /*************************************************************************/ |
| 1533 | /*************************************************************************/ |
| 1534 | /*************************************************************************/ |
| 1535 | |
| 1536 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1537 | #define AF_LIGHT_MODE_MAX_HORZ_GAP 9 |
| 1538 | #define AF_LIGHT_MODE_MAX_VERT_GAP 15 |
| 1539 | #define AF_LIGHT_MODE_MAX_DELTA_ABS 14 |
| 1540 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1541 | |
| 1542 | static FT_Pos |
| 1543 | af_hint_normal_stem( AF_GlyphHints hints, |
| 1544 | AF_Edge edge, |
| 1545 | AF_Edge edge2, |
| 1546 | FT_Pos anchor, |
| 1547 | AF_Dimension dim ) |
| 1548 | { |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1549 | FT_Pos org_len, cur_len, org_center; |
| 1550 | FT_Pos cur_pos1, cur_pos2; |
| 1551 | FT_Pos d_off1, u_off1, d_off2, u_off2, delta; |
| 1552 | FT_Pos offset; |
| 1553 | FT_Pos threshold = 64; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1554 | |
| 1555 | |
| 1556 | if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) |
| 1557 | { |
| 1558 | if ( ( edge->flags & AF_EDGE_ROUND ) && |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1559 | ( edge2->flags & AF_EDGE_ROUND ) ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1560 | { |
| 1561 | if ( dim == AF_DIMENSION_VERT ) |
| 1562 | threshold = 64 - AF_LIGHT_MODE_MAX_HORZ_GAP; |
| 1563 | else |
| 1564 | threshold = 64 - AF_LIGHT_MODE_MAX_VERT_GAP; |
| 1565 | } |
| 1566 | else |
| 1567 | { |
| 1568 | if ( dim == AF_DIMENSION_VERT ) |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1569 | threshold = 64 - AF_LIGHT_MODE_MAX_HORZ_GAP / 3; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1570 | else |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1571 | threshold = 64 - AF_LIGHT_MODE_MAX_VERT_GAP / 3; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1572 | } |
| 1573 | } |
| 1574 | |
| 1575 | org_len = edge2->opos - edge->opos; |
| 1576 | cur_len = af_cjk_compute_stem_width( hints, dim, org_len, |
David Turner | 6c71c6b | 2006-02-25 12:49:40 +0000 | [diff] [blame] | 1577 | (AF_Edge_Flags)edge->flags, |
| 1578 | (AF_Edge_Flags)edge2->flags ); |
| 1579 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1580 | org_center = ( edge->opos + edge2->opos ) / 2 + anchor; |
| 1581 | cur_pos1 = org_center - cur_len / 2; |
| 1582 | cur_pos2 = cur_pos1 + cur_len; |
| 1583 | d_off1 = cur_pos1 - FT_PIX_FLOOR( cur_pos1 ); |
| 1584 | d_off2 = cur_pos2 - FT_PIX_FLOOR( cur_pos2 ); |
| 1585 | u_off1 = 64 - d_off1; |
| 1586 | u_off2 = 64 - d_off2; |
| 1587 | delta = 0; |
| 1588 | |
| 1589 | |
| 1590 | if ( d_off1 == 0 || d_off2 == 0 ) |
| 1591 | goto Exit; |
| 1592 | |
| 1593 | if ( cur_len <= threshold ) |
| 1594 | { |
| 1595 | if ( d_off2 < cur_len ) |
| 1596 | { |
| 1597 | if ( u_off1 <= d_off2 ) |
| 1598 | delta = u_off1; |
| 1599 | else |
| 1600 | delta = -d_off2; |
| 1601 | } |
| 1602 | |
| 1603 | goto Exit; |
| 1604 | } |
| 1605 | |
| 1606 | if ( threshold < 64 ) |
| 1607 | { |
| 1608 | if ( d_off1 >= threshold || u_off1 >= threshold || |
| 1609 | d_off2 >= threshold || u_off2 >= threshold ) |
| 1610 | goto Exit; |
| 1611 | } |
| 1612 | |
| 1613 | offset = cur_len % 64; |
| 1614 | |
| 1615 | if ( offset < 32 ) |
| 1616 | { |
| 1617 | if ( u_off1 <= offset || d_off2 <= offset ) |
| 1618 | goto Exit; |
| 1619 | } |
| 1620 | else |
| 1621 | offset = 64 - threshold; |
| 1622 | |
| 1623 | d_off1 = threshold - u_off1; |
| 1624 | u_off1 = u_off1 - offset; |
| 1625 | u_off2 = threshold - d_off2; |
| 1626 | d_off2 = d_off2 - offset; |
| 1627 | |
| 1628 | if ( d_off1 <= u_off1 ) |
| 1629 | u_off1 = -d_off1; |
| 1630 | |
| 1631 | if ( d_off2 <= u_off2 ) |
| 1632 | u_off2 = -d_off2; |
| 1633 | |
| 1634 | if ( FT_ABS( u_off1 ) <= FT_ABS( u_off2 ) ) |
| 1635 | delta = u_off1; |
| 1636 | else |
| 1637 | delta = u_off2; |
| 1638 | |
| 1639 | Exit: |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1640 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1641 | #if 1 |
| 1642 | if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) |
| 1643 | { |
| 1644 | if ( delta > AF_LIGHT_MODE_MAX_DELTA_ABS ) |
| 1645 | delta = AF_LIGHT_MODE_MAX_DELTA_ABS; |
| 1646 | else if ( delta < -AF_LIGHT_MODE_MAX_DELTA_ABS ) |
| 1647 | delta = -AF_LIGHT_MODE_MAX_DELTA_ABS; |
| 1648 | } |
| 1649 | #endif |
| 1650 | |
| 1651 | cur_pos1 += delta; |
| 1652 | |
| 1653 | if ( edge->opos < edge2->opos ) |
| 1654 | { |
| 1655 | edge->pos = cur_pos1; |
| 1656 | edge2->pos = cur_pos1 + cur_len; |
| 1657 | } |
| 1658 | else |
| 1659 | { |
| 1660 | edge->pos = cur_pos1 + cur_len; |
| 1661 | edge2->pos = cur_pos1; |
| 1662 | } |
| 1663 | |
| 1664 | return delta; |
| 1665 | } |
| 1666 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1667 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1668 | static void |
| 1669 | af_cjk_hint_edges( AF_GlyphHints hints, |
| 1670 | AF_Dimension dim ) |
| 1671 | { |
| 1672 | AF_AxisHints axis = &hints->axis[dim]; |
| 1673 | AF_Edge edges = axis->edges; |
| 1674 | AF_Edge edge_limit = edges + axis->num_edges; |
suzuki toshiya | b566802 | 2009-08-01 00:32:07 +0900 | [diff] [blame] | 1675 | FT_PtrDist n_edges; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1676 | AF_Edge edge; |
| 1677 | AF_Edge anchor = 0; |
| 1678 | FT_Pos delta = 0; |
| 1679 | FT_Int skipped = 0; |
suzuki toshiya | a345c0e | 2011-04-21 10:58:33 +0900 | [diff] [blame] | 1680 | FT_Bool has_last_stem = FALSE; |
| 1681 | FT_Pos last_stem_pos = 0; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1682 | |
| 1683 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1684 | /* we begin by aligning all stems relative to the blue zone */ |
| 1685 | FT_TRACE5(( "==== cjk hinting %s edges =====\n", |
| 1686 | dim == AF_DIMENSION_HORZ ? "vertical" : "horizontal" )); |
| 1687 | |
| 1688 | if ( AF_HINTS_DO_BLUES( hints ) ) |
| 1689 | { |
| 1690 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1691 | { |
| 1692 | AF_Width blue; |
| 1693 | AF_Edge edge1, edge2; |
| 1694 | |
| 1695 | |
| 1696 | if ( edge->flags & AF_EDGE_DONE ) |
| 1697 | continue; |
| 1698 | |
| 1699 | blue = edge->blue_edge; |
| 1700 | edge1 = NULL; |
| 1701 | edge2 = edge->link; |
| 1702 | |
| 1703 | if ( blue ) |
| 1704 | { |
| 1705 | edge1 = edge; |
| 1706 | } |
| 1707 | else if ( edge2 && edge2->blue_edge ) |
| 1708 | { |
| 1709 | blue = edge2->blue_edge; |
| 1710 | edge1 = edge2; |
| 1711 | edge2 = edge; |
| 1712 | } |
| 1713 | |
| 1714 | if ( !edge1 ) |
| 1715 | continue; |
| 1716 | |
| 1717 | FT_TRACE5(( "CJKBLUE: edge %d @%d (opos=%.2f) snapped to (%.2f), " |
| 1718 | "was (%.2f)\n", |
| 1719 | edge1-edges, edge1->fpos, edge1->opos / 64.0, blue->fit / 64.0, |
| 1720 | edge1->pos / 64.0 )); |
| 1721 | |
| 1722 | edge1->pos = blue->fit; |
| 1723 | edge1->flags |= AF_EDGE_DONE; |
| 1724 | |
| 1725 | if ( edge2 && !edge2->blue_edge ) |
| 1726 | { |
| 1727 | af_cjk_align_linked_edge( hints, dim, edge1, edge2 ); |
| 1728 | edge2->flags |= AF_EDGE_DONE; |
| 1729 | } |
| 1730 | |
| 1731 | if ( !anchor ) |
| 1732 | anchor = edge; |
| 1733 | } |
| 1734 | } |
| 1735 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1736 | /* now we align all stem edges. */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1737 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1738 | { |
| 1739 | AF_Edge edge2; |
| 1740 | |
| 1741 | |
| 1742 | if ( edge->flags & AF_EDGE_DONE ) |
| 1743 | continue; |
| 1744 | |
| 1745 | /* skip all non-stem edges */ |
| 1746 | edge2 = edge->link; |
| 1747 | if ( !edge2 ) |
| 1748 | { |
| 1749 | skipped++; |
| 1750 | continue; |
| 1751 | } |
| 1752 | |
suzuki toshiya | a345c0e | 2011-04-21 10:58:33 +0900 | [diff] [blame] | 1753 | /* Some CJK characters have so many stems that |
| 1754 | * the hinter is likely to merge two adjacent ones. |
| 1755 | * To solve this problem, if either edge of a stem |
| 1756 | * is too close to the previous one, we avoid |
| 1757 | * aligning the two edges, but rather interpolate |
| 1758 | * their locations at the end of this function in |
| 1759 | * order to preserve the space between the stems. |
| 1760 | */ |
| 1761 | if ( has_last_stem && |
| 1762 | ( edge->pos < last_stem_pos + 64 || |
| 1763 | edge2->pos < last_stem_pos + 64 ) ) |
| 1764 | { |
| 1765 | skipped++; |
| 1766 | continue; |
| 1767 | } |
| 1768 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1769 | /* now align the stem */ |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 1770 | /* this should not happen, but it's better to be safe */ |
| 1771 | if ( edge2->blue_edge ) |
| 1772 | { |
| 1773 | FT_TRACE5(( "ASSERTION FAILED for edge %d\n", edge2-edges )); |
| 1774 | |
| 1775 | af_cjk_align_linked_edge( hints, dim, edge2, edge ); |
| 1776 | edge->flags |= AF_EDGE_DONE; |
| 1777 | continue; |
| 1778 | } |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1779 | |
| 1780 | if ( edge2 < edge ) |
| 1781 | { |
| 1782 | af_cjk_align_linked_edge( hints, dim, edge2, edge ); |
| 1783 | edge->flags |= AF_EDGE_DONE; |
suzuki toshiya | a345c0e | 2011-04-21 10:58:33 +0900 | [diff] [blame] | 1784 | /* We rarely reaches here it seems; |
| 1785 | * usually the two edges belonging |
| 1786 | * to one stem are marked as DONE together |
| 1787 | */ |
| 1788 | has_last_stem = TRUE; |
| 1789 | last_stem_pos = edge->pos; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1790 | continue; |
| 1791 | } |
| 1792 | |
| 1793 | if ( dim != AF_DIMENSION_VERT && !anchor ) |
| 1794 | { |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1795 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1796 | #if 0 |
| 1797 | if ( fixedpitch ) |
| 1798 | { |
| 1799 | AF_Edge left = edge; |
| 1800 | AF_Edge right = edge_limit - 1; |
| 1801 | AF_EdgeRec left1, left2, right1, right2; |
| 1802 | FT_Pos target, center1, center2; |
| 1803 | FT_Pos delta1, delta2, d1, d2; |
| 1804 | |
| 1805 | |
| 1806 | while ( right > left && !right->link ) |
| 1807 | right--; |
| 1808 | |
| 1809 | left1 = *left; |
| 1810 | left2 = *left->link; |
| 1811 | right1 = *right->link; |
| 1812 | right2 = *right; |
| 1813 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1814 | delta = ( ( ( hinter->pp2.x + 32 ) & -64 ) - hinter->pp2.x ) / 2; |
| 1815 | target = left->opos + ( right->opos - left->opos ) / 2 + delta - 16; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1816 | |
| 1817 | delta1 = delta; |
| 1818 | delta1 += af_hint_normal_stem( hints, left, left->link, |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1819 | delta1, 0 ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1820 | |
| 1821 | if ( left->link != right ) |
| 1822 | af_hint_normal_stem( hints, right->link, right, delta1, 0 ); |
| 1823 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1824 | center1 = left->pos + ( right->pos - left->pos ) / 2; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1825 | |
| 1826 | if ( center1 >= target ) |
| 1827 | delta2 = delta - 32; |
| 1828 | else |
| 1829 | delta2 = delta + 32; |
| 1830 | |
| 1831 | delta2 += af_hint_normal_stem( hints, &left1, &left2, delta2, 0 ); |
| 1832 | |
| 1833 | if ( delta1 != delta2 ) |
| 1834 | { |
| 1835 | if ( left->link != right ) |
| 1836 | af_hint_normal_stem( hints, &right1, &right2, delta2, 0 ); |
| 1837 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1838 | center2 = left1.pos + ( right2.pos - left1.pos ) / 2; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1839 | |
| 1840 | d1 = center1 - target; |
| 1841 | d2 = center2 - target; |
| 1842 | |
| 1843 | if ( FT_ABS( d2 ) < FT_ABS( d1 ) ) |
| 1844 | { |
| 1845 | left->pos = left1.pos; |
| 1846 | left->link->pos = left2.pos; |
| 1847 | |
| 1848 | if ( left->link != right ) |
| 1849 | { |
| 1850 | right->link->pos = right1.pos; |
| 1851 | right->pos = right2.pos; |
| 1852 | } |
| 1853 | |
| 1854 | delta1 = delta2; |
| 1855 | } |
| 1856 | } |
| 1857 | |
| 1858 | delta = delta1; |
| 1859 | right->link->flags |= AF_EDGE_DONE; |
| 1860 | right->flags |= AF_EDGE_DONE; |
| 1861 | } |
| 1862 | else |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1863 | |
| 1864 | #endif /* 0 */ |
| 1865 | |
David Turner | 6c71c6b | 2006-02-25 12:49:40 +0000 | [diff] [blame] | 1866 | delta = af_hint_normal_stem( hints, edge, edge2, 0, |
| 1867 | AF_DIMENSION_HORZ ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1868 | } |
| 1869 | else |
| 1870 | af_hint_normal_stem( hints, edge, edge2, delta, dim ); |
| 1871 | |
| 1872 | #if 0 |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 1873 | printf( "stem (%d,%d) adjusted (%.1f,%.1f)\n", |
| 1874 | edge - edges, edge2 - edges, |
| 1875 | ( edge->pos - edge->opos ) / 64.0, |
| 1876 | ( edge2->pos - edge2->opos ) / 64.0 ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1877 | #endif |
| 1878 | |
| 1879 | anchor = edge; |
| 1880 | edge->flags |= AF_EDGE_DONE; |
| 1881 | edge2->flags |= AF_EDGE_DONE; |
suzuki toshiya | a345c0e | 2011-04-21 10:58:33 +0900 | [diff] [blame] | 1882 | has_last_stem = TRUE; |
| 1883 | last_stem_pos = edge2->pos; |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1884 | } |
| 1885 | |
| 1886 | /* make sure that lowercase m's maintain their symmetry */ |
| 1887 | |
| 1888 | /* In general, lowercase m's have six vertical edges if they are sans */ |
| 1889 | /* serif, or twelve if they are with serifs. This implementation is */ |
| 1890 | /* based on that assumption, and seems to work very well with most */ |
| 1891 | /* faces. However, if for a certain face this assumption is not */ |
| 1892 | /* true, the m is just rendered like before. In addition, any stem */ |
| 1893 | /* correction will only be applied to symmetrical glyphs (even if the */ |
| 1894 | /* glyph is not an m), so the potential for unwanted distortion is */ |
| 1895 | /* relatively low. */ |
| 1896 | |
| 1897 | /* We don't handle horizontal edges since we can't easily assure that */ |
| 1898 | /* the third (lowest) stem aligns with the base line; it might end up */ |
| 1899 | /* one pixel higher or lower. */ |
| 1900 | |
| 1901 | n_edges = edge_limit - edges; |
| 1902 | if ( dim == AF_DIMENSION_HORZ && ( n_edges == 6 || n_edges == 12 ) ) |
| 1903 | { |
| 1904 | AF_Edge edge1, edge2, edge3; |
| 1905 | FT_Pos dist1, dist2, span; |
| 1906 | |
| 1907 | |
| 1908 | if ( n_edges == 6 ) |
| 1909 | { |
| 1910 | edge1 = edges; |
| 1911 | edge2 = edges + 2; |
| 1912 | edge3 = edges + 4; |
| 1913 | } |
| 1914 | else |
| 1915 | { |
| 1916 | edge1 = edges + 1; |
| 1917 | edge2 = edges + 5; |
| 1918 | edge3 = edges + 9; |
| 1919 | } |
| 1920 | |
| 1921 | dist1 = edge2->opos - edge1->opos; |
| 1922 | dist2 = edge3->opos - edge2->opos; |
| 1923 | |
| 1924 | span = dist1 - dist2; |
| 1925 | if ( span < 0 ) |
| 1926 | span = -span; |
| 1927 | |
| 1928 | if ( edge1->link == edge1 + 1 && |
| 1929 | edge2->link == edge2 + 1 && |
| 1930 | edge3->link == edge3 + 1 && span < 8 ) |
| 1931 | { |
| 1932 | delta = edge3->pos - ( 2 * edge2->pos - edge1->pos ); |
| 1933 | edge3->pos -= delta; |
| 1934 | if ( edge3->link ) |
| 1935 | edge3->link->pos -= delta; |
| 1936 | |
| 1937 | /* move the serifs along with the stem */ |
| 1938 | if ( n_edges == 12 ) |
| 1939 | { |
| 1940 | ( edges + 8 )->pos -= delta; |
| 1941 | ( edges + 11 )->pos -= delta; |
| 1942 | } |
| 1943 | |
| 1944 | edge3->flags |= AF_EDGE_DONE; |
| 1945 | if ( edge3->link ) |
| 1946 | edge3->link->flags |= AF_EDGE_DONE; |
| 1947 | } |
| 1948 | } |
| 1949 | |
| 1950 | if ( !skipped ) |
| 1951 | return; |
| 1952 | |
| 1953 | /* |
| 1954 | * now hint the remaining edges (serifs and single) in order |
| 1955 | * to complete our processing |
| 1956 | */ |
| 1957 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1958 | { |
| 1959 | if ( edge->flags & AF_EDGE_DONE ) |
| 1960 | continue; |
| 1961 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 1962 | if ( edge->serif ) |
| 1963 | { |
| 1964 | af_cjk_align_serif_edge( hints, edge->serif, edge ); |
| 1965 | edge->flags |= AF_EDGE_DONE; |
| 1966 | skipped--; |
| 1967 | } |
| 1968 | } |
| 1969 | |
| 1970 | if ( !skipped ) |
| 1971 | return; |
| 1972 | |
| 1973 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 1974 | { |
| 1975 | AF_Edge before, after; |
| 1976 | |
| 1977 | |
| 1978 | if ( edge->flags & AF_EDGE_DONE ) |
| 1979 | continue; |
| 1980 | |
| 1981 | before = after = edge; |
| 1982 | |
| 1983 | while ( --before >= edges ) |
| 1984 | if ( before->flags & AF_EDGE_DONE ) |
| 1985 | break; |
| 1986 | |
| 1987 | while ( ++after < edge_limit ) |
| 1988 | if ( after->flags & AF_EDGE_DONE ) |
| 1989 | break; |
| 1990 | |
| 1991 | if ( before >= edges || after < edge_limit ) |
| 1992 | { |
| 1993 | if ( before < edges ) |
| 1994 | af_cjk_align_serif_edge( hints, after, edge ); |
| 1995 | else if ( after >= edge_limit ) |
| 1996 | af_cjk_align_serif_edge( hints, before, edge ); |
| 1997 | else |
Werner Lemberg | b6fa845 | 2008-12-21 09:46:31 +0000 | [diff] [blame] | 1998 | { |
| 1999 | if ( after->fpos == before->fpos ) |
| 2000 | edge->pos = before->pos; |
| 2001 | else |
| 2002 | edge->pos = before->pos + |
| 2003 | FT_MulDiv( edge->fpos - before->fpos, |
| 2004 | after->pos - before->pos, |
| 2005 | after->fpos - before->fpos ); |
| 2006 | } |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2007 | } |
| 2008 | } |
| 2009 | } |
| 2010 | |
| 2011 | |
| 2012 | static void |
| 2013 | af_cjk_align_edge_points( AF_GlyphHints hints, |
| 2014 | AF_Dimension dim ) |
| 2015 | { |
| 2016 | AF_AxisHints axis = & hints->axis[dim]; |
| 2017 | AF_Edge edges = axis->edges; |
| 2018 | AF_Edge edge_limit = edges + axis->num_edges; |
| 2019 | AF_Edge edge; |
| 2020 | FT_Bool snapping; |
| 2021 | |
| 2022 | |
David Turner | da95af6 | 2006-03-20 13:32:33 +0000 | [diff] [blame] | 2023 | snapping = FT_BOOL( ( dim == AF_DIMENSION_HORZ && |
| 2024 | AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) || |
| 2025 | ( dim == AF_DIMENSION_VERT && |
| 2026 | AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2027 | |
| 2028 | for ( edge = edges; edge < edge_limit; edge++ ) |
| 2029 | { |
| 2030 | /* move the points of each segment */ |
| 2031 | /* in each edge to the edge's position */ |
| 2032 | AF_Segment seg = edge->first; |
| 2033 | |
| 2034 | |
| 2035 | if ( snapping ) |
| 2036 | { |
| 2037 | do |
| 2038 | { |
| 2039 | AF_Point point = seg->first; |
| 2040 | |
| 2041 | |
| 2042 | for (;;) |
| 2043 | { |
| 2044 | if ( dim == AF_DIMENSION_HORZ ) |
| 2045 | { |
| 2046 | point->x = edge->pos; |
| 2047 | point->flags |= AF_FLAG_TOUCH_X; |
| 2048 | } |
| 2049 | else |
| 2050 | { |
| 2051 | point->y = edge->pos; |
| 2052 | point->flags |= AF_FLAG_TOUCH_Y; |
| 2053 | } |
| 2054 | |
| 2055 | if ( point == seg->last ) |
| 2056 | break; |
| 2057 | |
| 2058 | point = point->next; |
| 2059 | } |
| 2060 | |
| 2061 | seg = seg->edge_next; |
| 2062 | |
| 2063 | } while ( seg != edge->first ); |
| 2064 | } |
| 2065 | else |
| 2066 | { |
| 2067 | FT_Pos delta = edge->pos - edge->opos; |
| 2068 | |
| 2069 | |
| 2070 | do |
| 2071 | { |
| 2072 | AF_Point point = seg->first; |
| 2073 | |
| 2074 | |
| 2075 | for (;;) |
| 2076 | { |
| 2077 | if ( dim == AF_DIMENSION_HORZ ) |
| 2078 | { |
| 2079 | point->x += delta; |
| 2080 | point->flags |= AF_FLAG_TOUCH_X; |
| 2081 | } |
| 2082 | else |
| 2083 | { |
| 2084 | point->y += delta; |
| 2085 | point->flags |= AF_FLAG_TOUCH_Y; |
| 2086 | } |
| 2087 | |
| 2088 | if ( point == seg->last ) |
| 2089 | break; |
| 2090 | |
| 2091 | point = point->next; |
| 2092 | } |
| 2093 | |
| 2094 | seg = seg->edge_next; |
| 2095 | |
| 2096 | } while ( seg != edge->first ); |
| 2097 | } |
| 2098 | } |
| 2099 | } |
| 2100 | |
| 2101 | |
Werner Lemberg | 1e1b6df | 2007-07-07 07:30:40 +0000 | [diff] [blame] | 2102 | FT_LOCAL_DEF( FT_Error ) |
Werner Lemberg | 27b20e9 | 2011-05-09 09:48:49 +0200 | [diff] [blame] | 2103 | af_cjk_hints_apply( AF_GlyphHints hints, |
| 2104 | FT_Outline* outline, |
| 2105 | AF_CJKMetrics metrics ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2106 | { |
| 2107 | FT_Error error; |
| 2108 | int dim; |
| 2109 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2110 | FT_UNUSED( metrics ); |
| 2111 | |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 2112 | |
Werner Lemberg | 0934438 | 2010-05-22 07:43:22 +0200 | [diff] [blame] | 2113 | error = af_glyph_hints_reload( hints, outline ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2114 | if ( error ) |
| 2115 | goto Exit; |
| 2116 | |
| 2117 | /* analyze glyph outline */ |
| 2118 | if ( AF_HINTS_DO_HORIZONTAL( hints ) ) |
| 2119 | { |
| 2120 | error = af_cjk_hints_detect_features( hints, AF_DIMENSION_HORZ ); |
| 2121 | if ( error ) |
| 2122 | goto Exit; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 2123 | |
| 2124 | af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_HORZ ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2125 | } |
| 2126 | |
| 2127 | if ( AF_HINTS_DO_VERTICAL( hints ) ) |
| 2128 | { |
| 2129 | error = af_cjk_hints_detect_features( hints, AF_DIMENSION_VERT ); |
| 2130 | if ( error ) |
| 2131 | goto Exit; |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 2132 | |
| 2133 | af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_VERT ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2134 | } |
| 2135 | |
| 2136 | /* grid-fit the outline */ |
| 2137 | for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) |
| 2138 | { |
| 2139 | if ( ( dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL( hints ) ) || |
| 2140 | ( dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL( hints ) ) ) |
| 2141 | { |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 2142 | |
Werner Lemberg | 576fc2c | 2011-03-02 03:52:36 +0100 | [diff] [blame] | 2143 | #ifdef AF_CONFIG_OPTION_USE_WARPER |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 2144 | if ( dim == AF_DIMENSION_HORZ && |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2145 | metrics->root.scaler.render_mode == FT_RENDER_MODE_NORMAL ) |
| 2146 | { |
| 2147 | AF_WarperRec warper; |
| 2148 | FT_Fixed scale; |
| 2149 | FT_Pos delta; |
| 2150 | |
| 2151 | |
Werner Lemberg | c7f26a1 | 2011-03-19 02:28:21 +0100 | [diff] [blame] | 2152 | af_warper_compute( &warper, hints, (AF_Dimension)dim, |
| 2153 | &scale, &delta ); |
| 2154 | af_glyph_hints_scale_dim( hints, (AF_Dimension)dim, |
| 2155 | scale, delta ); |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2156 | continue; |
| 2157 | } |
Werner Lemberg | 576fc2c | 2011-03-02 03:52:36 +0100 | [diff] [blame] | 2158 | #endif /* AF_CONFIG_OPTION_USE_WARPER */ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 2159 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2160 | af_cjk_hint_edges( hints, (AF_Dimension)dim ); |
| 2161 | af_cjk_align_edge_points( hints, (AF_Dimension)dim ); |
| 2162 | af_glyph_hints_align_strong_points( hints, (AF_Dimension)dim ); |
| 2163 | af_glyph_hints_align_weak_points( hints, (AF_Dimension)dim ); |
| 2164 | } |
| 2165 | } |
| 2166 | |
| 2167 | #if 0 |
| 2168 | af_glyph_hints_dump_points( hints ); |
| 2169 | af_glyph_hints_dump_segments( hints ); |
| 2170 | af_glyph_hints_dump_edges( hints ); |
| 2171 | #endif |
| 2172 | |
| 2173 | af_glyph_hints_save( hints, outline ); |
| 2174 | |
| 2175 | Exit: |
| 2176 | return error; |
| 2177 | } |
| 2178 | |
| 2179 | |
| 2180 | /*************************************************************************/ |
| 2181 | /*************************************************************************/ |
| 2182 | /***** *****/ |
Werner Lemberg | d1d4bff | 2006-02-10 22:15:22 +0000 | [diff] [blame] | 2183 | /***** C J K S C R I P T C L A S S *****/ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2184 | /***** *****/ |
| 2185 | /*************************************************************************/ |
| 2186 | /*************************************************************************/ |
| 2187 | |
| 2188 | |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2189 | /* this corresponds to Unicode 6.0 */ |
| 2190 | |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2191 | static const AF_Script_UniRangeRec af_cjk_uniranges[] = |
| 2192 | { |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2193 | AF_UNIRANGE_REC( 0x2E80UL, 0x2EFFUL ), /* CJK Radicals Supplement */ |
| 2194 | AF_UNIRANGE_REC( 0x2F00UL, 0x2FDFUL ), /* Kangxi Radicals */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2195 | AF_UNIRANGE_REC( 0x2FF0UL, 0x2FFFUL ), /* Ideographic Description Characters */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2196 | AF_UNIRANGE_REC( 0x3000UL, 0x303FUL ), /* CJK Symbols and Punctuation */ |
| 2197 | AF_UNIRANGE_REC( 0x3040UL, 0x309FUL ), /* Hiragana */ |
| 2198 | AF_UNIRANGE_REC( 0x30A0UL, 0x30FFUL ), /* Katakana */ |
| 2199 | AF_UNIRANGE_REC( 0x3100UL, 0x312FUL ), /* Bopomofo */ |
| 2200 | AF_UNIRANGE_REC( 0x3130UL, 0x318FUL ), /* Hangul Compatibility Jamo */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2201 | AF_UNIRANGE_REC( 0x3190UL, 0x319FUL ), /* Kanbun */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2202 | AF_UNIRANGE_REC( 0x31A0UL, 0x31BFUL ), /* Bopomofo Extended */ |
| 2203 | AF_UNIRANGE_REC( 0x31C0UL, 0x31EFUL ), /* CJK Strokes */ |
| 2204 | AF_UNIRANGE_REC( 0x31F0UL, 0x31FFUL ), /* Katakana Phonetic Extensions */ |
| 2205 | AF_UNIRANGE_REC( 0x3200UL, 0x32FFUL ), /* Enclosed CJK Letters and Months */ |
| 2206 | AF_UNIRANGE_REC( 0x3300UL, 0x33FFUL ), /* CJK Compatibility */ |
| 2207 | AF_UNIRANGE_REC( 0x3400UL, 0x4DBFUL ), /* CJK Unified Ideographs Extension A */ |
| 2208 | AF_UNIRANGE_REC( 0x4DC0UL, 0x4DFFUL ), /* Yijing Hexagram Symbols */ |
| 2209 | AF_UNIRANGE_REC( 0x4E00UL, 0x9FFFUL ), /* CJK Unified Ideographs */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2210 | AF_UNIRANGE_REC( 0xA960UL, 0xA97FUL ), /* Hangul Jamo Extended-A */ |
| 2211 | AF_UNIRANGE_REC( 0xAC00UL, 0xD7AFUL ), /* Hangul Syllables */ |
| 2212 | AF_UNIRANGE_REC( 0xD7B0UL, 0xD7FFUL ), /* Hangul Jamo Extended-B */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2213 | AF_UNIRANGE_REC( 0xF900UL, 0xFAFFUL ), /* CJK Compatibility Ideographs */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2214 | AF_UNIRANGE_REC( 0xFE10UL, 0xFE1FUL ), /* Vertical forms */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2215 | AF_UNIRANGE_REC( 0xFE30UL, 0xFE4FUL ), /* CJK Compatibility Forms */ |
| 2216 | AF_UNIRANGE_REC( 0xFF00UL, 0xFFEFUL ), /* Halfwidth and Fullwidth Forms */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2217 | AF_UNIRANGE_REC( 0x1B000UL, 0x1B0FFUL ), /* Kana Supplement */ |
| 2218 | AF_UNIRANGE_REC( 0x1D300UL, 0x1D35FUL ), /* Tai Xuan Hing Symbols */ |
| 2219 | AF_UNIRANGE_REC( 0x1F200UL, 0x1F2FFUL ), /* Enclosed Ideographic Supplement */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2220 | AF_UNIRANGE_REC( 0x20000UL, 0x2A6DFUL ), /* CJK Unified Ideographs Extension B */ |
Werner Lemberg | 7f03a24 | 2011-04-07 07:20:38 +0200 | [diff] [blame] | 2221 | AF_UNIRANGE_REC( 0x2A700UL, 0x2B73FUL ), /* CJK Unified Ideographs Extension C */ |
| 2222 | AF_UNIRANGE_REC( 0x2B740UL, 0x2B81FUL ), /* CJK Unified Ideographs Extension D */ |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2223 | AF_UNIRANGE_REC( 0x2F800UL, 0x2FA1FUL ), /* CJK Compatibility Ideographs Supplement */ |
| 2224 | AF_UNIRANGE_REC( 0UL, 0UL ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2225 | }; |
| 2226 | |
| 2227 | |
Oran Agra | 59b4af8 | 2009-04-05 18:23:38 +0300 | [diff] [blame] | 2228 | AF_DEFINE_SCRIPT_CLASS(af_cjk_script_class, |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2229 | AF_SCRIPT_CJK, |
| 2230 | af_cjk_uniranges, |
| 2231 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 2232 | sizeof( AF_CJKMetricsRec ), |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2233 | |
| 2234 | (AF_Script_InitMetricsFunc) af_cjk_metrics_init, |
| 2235 | (AF_Script_ScaleMetricsFunc)af_cjk_metrics_scale, |
| 2236 | (AF_Script_DoneMetricsFunc) NULL, |
| 2237 | |
| 2238 | (AF_Script_InitHintsFunc) af_cjk_hints_init, |
| 2239 | (AF_Script_ApplyHintsFunc) af_cjk_hints_apply |
Oran Agra | 59b4af8 | 2009-04-05 18:23:38 +0300 | [diff] [blame] | 2240 | ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2241 | |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 2242 | #else /* !AF_CONFIG_OPTION_CJK */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2243 | |
| 2244 | static const AF_Script_UniRangeRec af_cjk_uniranges[] = |
| 2245 | { |
suzuki toshiya | 38e480b | 2009-08-01 00:30:21 +0900 | [diff] [blame] | 2246 | AF_UNIRANGE_REC( 0UL, 0UL ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2247 | }; |
| 2248 | |
| 2249 | |
Oran Agra | 59b4af8 | 2009-04-05 18:23:38 +0300 | [diff] [blame] | 2250 | AF_DEFINE_SCRIPT_CLASS(af_cjk_script_class, |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2251 | AF_SCRIPT_CJK, |
| 2252 | af_cjk_uniranges, |
| 2253 | |
suzuki toshiya | 084abf0 | 2011-05-08 19:07:13 +0900 | [diff] [blame] | 2254 | sizeof( AF_CJKMetricsRec ), |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2255 | |
| 2256 | (AF_Script_InitMetricsFunc) NULL, |
| 2257 | (AF_Script_ScaleMetricsFunc)NULL, |
| 2258 | (AF_Script_DoneMetricsFunc) NULL, |
| 2259 | |
| 2260 | (AF_Script_InitHintsFunc) NULL, |
| 2261 | (AF_Script_ApplyHintsFunc) NULL |
Oran Agra | 59b4af8 | 2009-04-05 18:23:38 +0300 | [diff] [blame] | 2262 | ) |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2263 | |
Wu, Chia-I (吳佳一) | f9a6913 | 2006-02-11 12:12:02 +0000 | [diff] [blame] | 2264 | #endif /* !AF_CONFIG_OPTION_CJK */ |
Wu, Chia-I (吳佳一) | 4cdb45c | 2006-02-09 14:17:04 +0000 | [diff] [blame] | 2265 | |
| 2266 | |
| 2267 | /* END */ |