1 /***************************************************************************/ 2 /* */ 3 /* afcjk.c */ 4 /* */ 5 /* Auto-fitter hinting routines for CJK script (body). */ 6 /* */ 7 /* Copyright 2006-2013 by */ 8 /* David Turner, Robert Wilhelm, and Werner Lemberg. */ 9 /* */ 10 /* This file is part of the FreeType project, and may only be used, */ 11 /* modified, and distributed under the terms of the FreeType project */ 12 /* license, LICENSE.TXT. By continuing to use, modify, or distribute */ 13 /* this file you indicate that you have read the license and */ 14 /* understand and accept it fully. */ 15 /* */ 16 /***************************************************************************/ 17 18 /* 19 * The algorithm is based on akito's autohint patch, available here: 20 * 21 * http://www.kde.gr.jp/~akito/patch/freetype2/ 22 * 23 */ 24 25 #include <ft2build.h> 26 #include FT_ADVANCES_H 27 #include FT_INTERNAL_DEBUG_H 28 29 #include "aftypes.h" 30 #include "aflatin.h" 31 32 33 #ifdef AF_CONFIG_OPTION_CJK 34 35 #undef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT 36 37 #include "afcjk.h" 38 #include "aferrors.h" 39 40 41 #ifdef AF_CONFIG_OPTION_USE_WARPER 42 #include "afwarp.h" 43 #endif 44 45 46 /*************************************************************************/ 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 /*************************************************************************/ 57 /*************************************************************************/ 58 /***** *****/ 59 /***** C J K G L O B A L M E T R I C S *****/ 60 /***** *****/ 61 /*************************************************************************/ 62 /*************************************************************************/ 63 64 65 /* Basically the Latin version with AF_CJKMetrics */ 66 /* to replace AF_LatinMetrics. */ 67 68 FT_LOCAL_DEF( void ) af_cjk_metrics_init_widths(AF_CJKMetrics metrics,FT_Face face)69 af_cjk_metrics_init_widths( AF_CJKMetrics metrics, 70 FT_Face face ) 71 { 72 /* scan the array of segments in each direction */ 73 AF_GlyphHintsRec hints[1]; 74 75 76 af_glyph_hints_init( hints, face->memory ); 77 78 metrics->axis[AF_DIMENSION_HORZ].width_count = 0; 79 metrics->axis[AF_DIMENSION_VERT].width_count = 0; 80 81 { 82 FT_Error error; 83 FT_UInt glyph_index; 84 int dim; 85 AF_CJKMetricsRec dummy[1]; 86 AF_Scaler scaler = &dummy->root.scaler; 87 88 89 glyph_index = FT_Get_Char_Index( face, 90 metrics->root.clazz->standard_char ); 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; 123 124 125 error = af_latin_hints_compute_segments( hints, (AF_Dimension)dim ); 126 if ( error ) 127 goto Exit; 128 129 af_latin_hints_link_segments( hints, (AF_Dimension)dim ); 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 /* this also replaces multiple almost identical stem widths */ 154 /* with a single one (the value 100 is heuristic) */ 155 af_sort_and_quantize_widths( &num_widths, axis->widths, 156 dummy->units_per_em / 100 ); 157 axis->width_count = num_widths; 158 } 159 160 Exit: 161 for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) 162 { 163 AF_CJKAxis axis = &metrics->axis[dim]; 164 FT_Pos stdw; 165 166 167 stdw = ( axis->width_count > 0 ) ? axis->widths[0].org 168 : AF_LATIN_CONSTANT( metrics, 50 ); 169 170 /* let's try 20% of the smallest width */ 171 axis->edge_distance_threshold = stdw / 5; 172 axis->standard_width = stdw; 173 axis->extra_light = 0; 174 } 175 } 176 177 af_glyph_hints_done( hints ); 178 } 179 180 181 #define AF_CJK_MAX_TEST_CHARACTERS 32 182 183 184 /* Each blue zone has two types of fill and unfill, this is, */ 185 /* filling the entire glyph square or not. */ 186 187 enum 188 { 189 AF_CJK_BLUE_TYPE_FILL, 190 AF_CJK_BLUE_TYPE_UNFILL, 191 AF_CJK_BLUE_TYPE_MAX 192 }; 193 194 195 /* Put some common and representative Han Ideographs characters here. */ 196 static const FT_ULong af_cjk_hani_blue_chars[AF_CJK_BLUE_MAX] 197 [AF_CJK_BLUE_TYPE_MAX] 198 [AF_CJK_MAX_TEST_CHARACTERS] = 199 { 200 { 201 { 202 0x4ED6, 0x4EEC, 0x4F60, 0x4F86, 0x5011, 0x5230, 0x548C, 0x5730, 203 0x5BF9, 0x5C0D, 0x5C31, 0x5E2D, 0x6211, 0x65F6, 0x6642, 0x6703, 204 0x6765, 0x70BA, 0x80FD, 0x8230, 0x8AAA, 0x8BF4, 0x8FD9, 0x9019, 205 0x9F4A /* top fill */ 206 }, 207 { 208 0x519B, 0x540C, 0x5DF2, 0x613F, 0x65E2, 0x661F, 0x662F, 0x666F, 209 0x6C11, 0x7167, 0x73B0, 0x73FE, 0x7406, 0x7528, 0x7F6E, 0x8981, 210 0x8ECD, 0x90A3, 0x914D, 0x91CC, 0x958B, 0x96F7, 0x9732, 0x9762, 211 0x987E /* top unfill */ 212 } 213 }, 214 { 215 { 216 0x4E2A, 0x4E3A, 0x4EBA, 0x4ED6, 0x4EE5, 0x4EEC, 0x4F60, 0x4F86, 217 0x500B, 0x5011, 0x5230, 0x548C, 0x5927, 0x5BF9, 0x5C0D, 0x5C31, 218 0x6211, 0x65F6, 0x6642, 0x6709, 0x6765, 0x70BA, 0x8981, 0x8AAA, 219 0x8BF4 /* bottom fill */ 220 }, 221 { 222 0x4E3B, 0x4E9B, 0x56E0, 0x5B83, 0x60F3, 0x610F, 0x7406, 0x751F, 223 0x7576, 0x770B, 0x7740, 0x7F6E, 0x8005, 0x81EA, 0x8457, 0x88E1, 224 0x8FC7, 0x8FD8, 0x8FDB, 0x9032, 0x904E, 0x9053, 0x9084, 0x91CC, 225 0x9762 /* bottom unfill */ 226 } 227 }, 228 #ifndef AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT 229 { {0x0000}, {0x0000} }, 230 { {0x0000}, {0x0000} } 231 #else 232 { 233 { 234 0x4E9B, 0x4EEC, 0x4F60, 0x4F86, 0x5011, 0x5230, 0x548C, 0x5730, 235 0x5979, 0x5C06, 0x5C07, 0x5C31, 0x5E74, 0x5F97, 0x60C5, 0x6700, 236 0x6837, 0x6A23, 0x7406, 0x80FD, 0x8AAA, 0x8BF4, 0x8FD9, 0x9019, 237 0x901A /* left fill */ 238 }, 239 { 240 0x5373, 0x5417, 0x5427, 0x542C, 0x5462, 0x54C1, 0x54CD, 0x55CE, 241 0x5E08, 0x5E2B, 0x6536, 0x65AD, 0x65B7, 0x660E, 0x773C, 0x9593, 242 0x95F4, 0x9645, 0x9648, 0x9650, 0x9664, 0x9673, 0x968F, 0x969B, 243 0x96A8 /* left unfill */ 244 } 245 }, 246 { 247 { 248 0x4E8B, 0x524D, 0x5B78, 0x5C06, 0x5C07, 0x60C5, 0x60F3, 0x6216, 249 0x653F, 0x65AF, 0x65B0, 0x6837, 0x6A23, 0x6C11, 0x6C92, 0x6CA1, 250 0x7136, 0x7279, 0x73B0, 0x73FE, 0x7403, 0x7B2C, 0x7D93, 0x8C01, 251 0x8D77 /* right fill */ 252 }, 253 { 254 0x4F8B, 0x5225, 0x522B, 0x5236, 0x52A8, 0x52D5, 0x5417, 0x55CE, 255 0x589E, 0x6307, 0x660E, 0x671D, 0x671F, 0x6784, 0x7269, 0x786E, 256 0x79CD, 0x8ABF, 0x8C03, 0x8CBB, 0x8D39, 0x90A3, 0x90FD, 0x9593, 257 0x95F4 /* right unfill */ 258 } 259 } 260 #endif /* AF_CONFIG_OPTION_CJK_BLUE_HANI_VERT */ 261 }; 262 263 264 /* Calculate blue zones for all the CJK_BLUE_XXX's. */ 265 266 static void af_cjk_metrics_init_blues(AF_CJKMetrics metrics,FT_Face face,const FT_ULong blue_chars[AF_CJK_BLUE_MAX][AF_CJK_BLUE_TYPE_MAX][AF_CJK_MAX_TEST_CHARACTERS])267 af_cjk_metrics_init_blues( AF_CJKMetrics metrics, 268 FT_Face face, 269 const FT_ULong blue_chars 270 [AF_CJK_BLUE_MAX] 271 [AF_CJK_BLUE_TYPE_MAX] 272 [AF_CJK_MAX_TEST_CHARACTERS] ) 273 { 274 FT_Pos fills[AF_CJK_MAX_TEST_CHARACTERS]; 275 FT_Pos flats[AF_CJK_MAX_TEST_CHARACTERS]; 276 277 FT_Int num_fills; 278 FT_Int num_flats; 279 280 FT_Int bb; 281 AF_CJKBlue blue; 282 FT_Error error; 283 AF_CJKAxis axis; 284 FT_GlyphSlot glyph = face->glyph; 285 286 #ifdef FT_DEBUG_LEVEL_TRACE 287 FT_String* cjk_blue_name[AF_CJK_BLUE_MAX] = { 288 (FT_String*)"top", 289 (FT_String*)"bottom", 290 (FT_String*)"left", 291 (FT_String*)"right" 292 }; 293 FT_String* cjk_blue_type_name[AF_CJK_BLUE_TYPE_MAX] = { 294 (FT_String*)"filled", 295 (FT_String*)"unfilled" 296 }; 297 #endif 298 299 300 /* We compute the blues simply by loading each character from the */ 301 /* `blue_chars[blues]' string, then computing its extreme points */ 302 /* (depending blue zone type etc.). */ 303 304 FT_TRACE5(( "cjk blue zones computation\n" )); 305 FT_TRACE5(( "------------------------------------------------\n" )); 306 307 for ( bb = 0; bb < AF_CJK_BLUE_MAX; bb++ ) 308 { 309 FT_Int fill_type; 310 FT_Pos* blue_ref; 311 FT_Pos* blue_shoot; 312 313 314 num_fills = 0; 315 num_flats = 0; 316 317 for ( fill_type = 0; fill_type < AF_CJK_BLUE_TYPE_MAX; fill_type++ ) 318 { 319 const FT_ULong* p = blue_chars[bb][fill_type]; 320 const FT_ULong* limit = p + AF_CJK_MAX_TEST_CHARACTERS; 321 FT_Bool fill = FT_BOOL( 322 fill_type == AF_CJK_BLUE_TYPE_FILL ); 323 324 325 FT_TRACE5(( "cjk blue %s/%s\n", cjk_blue_name[bb], 326 cjk_blue_type_name[fill_type] )); 327 328 329 for ( ; p < limit && *p; p++ ) 330 { 331 FT_UInt glyph_index; 332 FT_Pos best_pos; /* same as points.y */ 333 FT_Int best_point; 334 FT_Vector* points; 335 336 337 FT_TRACE5(( " U+%lX...", *p )); 338 339 /* load the character in the face -- skip unknown or empty ones */ 340 glyph_index = FT_Get_Char_Index( face, *p ); 341 if ( glyph_index == 0 ) 342 { 343 FT_TRACE5(( "unavailable\n" )); 344 continue; 345 } 346 347 error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE ); 348 if ( error || glyph->outline.n_points <= 0 ) 349 { 350 FT_TRACE5(( "no outline\n" )); 351 continue; 352 } 353 354 /* now compute min or max point indices and coordinates */ 355 points = glyph->outline.points; 356 best_point = -1; 357 best_pos = 0; /* make compiler happy */ 358 359 { 360 FT_Int nn; 361 FT_Int first = 0; 362 FT_Int last = -1; 363 364 365 for ( nn = 0; 366 nn < glyph->outline.n_contours; 367 first = last + 1, nn++ ) 368 { 369 FT_Int pp; 370 371 372 last = glyph->outline.contours[nn]; 373 374 /* Avoid single-point contours since they are never */ 375 /* rasterized. In some fonts, they correspond to mark */ 376 /* attachment points which are way outside of the glyph's */ 377 /* real outline. */ 378 if ( last <= first ) 379 continue; 380 381 switch ( bb ) 382 { 383 case AF_CJK_BLUE_TOP: 384 for ( pp = first; pp <= last; pp++ ) 385 if ( best_point < 0 || points[pp].y > best_pos ) 386 { 387 best_point = pp; 388 best_pos = points[pp].y; 389 } 390 break; 391 392 case AF_CJK_BLUE_BOTTOM: 393 for ( pp = first; pp <= last; pp++ ) 394 if ( best_point < 0 || points[pp].y < best_pos ) 395 { 396 best_point = pp; 397 best_pos = points[pp].y; 398 } 399 break; 400 401 case AF_CJK_BLUE_LEFT: 402 for ( pp = first; pp <= last; pp++ ) 403 if ( best_point < 0 || points[pp].x < best_pos ) 404 { 405 best_point = pp; 406 best_pos = points[pp].x; 407 } 408 break; 409 410 case AF_CJK_BLUE_RIGHT: 411 for ( pp = first; pp <= last; pp++ ) 412 if ( best_point < 0 || points[pp].x > best_pos ) 413 { 414 best_point = pp; 415 best_pos = points[pp].x; 416 } 417 break; 418 419 default: 420 ; 421 } 422 } 423 FT_TRACE5(( "best_pos=%5ld\n", best_pos )); 424 } 425 426 if ( fill ) 427 fills[num_fills++] = best_pos; 428 else 429 flats[num_flats++] = best_pos; 430 } 431 } 432 433 if ( num_flats == 0 && num_fills == 0 ) 434 { 435 /* 436 * we couldn't find a single glyph to compute this blue zone, 437 * we will simply ignore it then 438 */ 439 FT_TRACE5(( "empty\n" )); 440 continue; 441 } 442 443 /* we have computed the contents of the `fill' and `flats' tables, */ 444 /* now determine the reference position of the blue -- */ 445 /* we simply take the median value after a simple sort */ 446 af_sort_pos( num_flats, flats ); 447 af_sort_pos( num_fills, fills ); 448 449 if ( AF_CJK_BLUE_TOP == bb || AF_CJK_BLUE_BOTTOM == bb ) 450 axis = &metrics->axis[AF_DIMENSION_VERT]; 451 else 452 axis = &metrics->axis[AF_DIMENSION_HORZ]; 453 454 blue = & axis->blues[axis->blue_count]; 455 blue_ref = & blue->ref.org; 456 blue_shoot = & blue->shoot.org; 457 458 axis->blue_count++; 459 if ( num_flats == 0 ) 460 { 461 *blue_ref = fills[num_fills / 2]; 462 *blue_shoot = fills[num_fills / 2]; 463 } 464 else if ( num_fills == 0 ) 465 { 466 *blue_ref = flats[num_flats / 2]; 467 *blue_shoot = flats[num_flats / 2]; 468 } 469 else 470 { 471 *blue_ref = fills[num_fills / 2]; 472 *blue_shoot = flats[num_flats / 2]; 473 } 474 475 /* make sure blue_ref >= blue_shoot for top/right or */ 476 /* vice versa for bottom/left */ 477 if ( *blue_shoot != *blue_ref ) 478 { 479 FT_Pos ref = *blue_ref; 480 FT_Pos shoot = *blue_shoot; 481 FT_Bool under_ref = FT_BOOL( shoot < ref ); 482 483 484 if ( ( AF_CJK_BLUE_TOP == bb || 485 AF_CJK_BLUE_RIGHT == bb ) ^ under_ref ) 486 *blue_shoot = *blue_ref = ( shoot + ref ) / 2; 487 } 488 489 blue->flags = 0; 490 if ( AF_CJK_BLUE_TOP == bb ) 491 blue->flags |= AF_CJK_BLUE_IS_TOP; 492 else if ( AF_CJK_BLUE_RIGHT == bb ) 493 blue->flags |= AF_CJK_BLUE_IS_RIGHT; 494 495 FT_TRACE5(( "-- cjk %s bluezone ref = %ld shoot = %ld\n", 496 cjk_blue_name[bb], *blue_ref, *blue_shoot )); 497 } 498 499 return; 500 } 501 502 503 /* Basically the Latin version with type AF_CJKMetrics for metrics. */ 504 FT_LOCAL_DEF( void ) af_cjk_metrics_check_digits(AF_CJKMetrics metrics,FT_Face face)505 af_cjk_metrics_check_digits( AF_CJKMetrics metrics, 506 FT_Face face ) 507 { 508 FT_UInt i; 509 FT_Bool started = 0, same_width = 1; 510 FT_Fixed advance, old_advance = 0; 511 512 513 /* check whether all ASCII digits have the same advance width; */ 514 /* digit `0' is 0x30 in all supported charmaps */ 515 for ( i = 0x30; i <= 0x39; i++ ) 516 { 517 FT_UInt glyph_index; 518 519 520 glyph_index = FT_Get_Char_Index( face, i ); 521 if ( glyph_index == 0 ) 522 continue; 523 524 if ( FT_Get_Advance( face, glyph_index, 525 FT_LOAD_NO_SCALE | 526 FT_LOAD_NO_HINTING | 527 FT_LOAD_IGNORE_TRANSFORM, 528 &advance ) ) 529 continue; 530 531 if ( started ) 532 { 533 if ( advance != old_advance ) 534 { 535 same_width = 0; 536 break; 537 } 538 } 539 else 540 { 541 old_advance = advance; 542 started = 1; 543 } 544 } 545 546 metrics->root.digits_have_same_width = same_width; 547 } 548 549 550 FT_LOCAL_DEF( FT_Error ) af_cjk_metrics_init(AF_CJKMetrics metrics,FT_Face face)551 af_cjk_metrics_init( AF_CJKMetrics metrics, 552 FT_Face face ) 553 { 554 FT_CharMap oldmap = face->charmap; 555 556 557 metrics->units_per_em = face->units_per_EM; 558 559 if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) ) 560 face->charmap = NULL; 561 else 562 { 563 af_cjk_metrics_init_widths( metrics, face ); 564 af_cjk_metrics_init_blues( metrics, face, af_cjk_hani_blue_chars ); 565 af_cjk_metrics_check_digits( metrics, face ); 566 } 567 568 FT_Set_Charmap( face, oldmap ); 569 570 return FT_Err_Ok; 571 } 572 573 574 static void af_cjk_metrics_scale_dim(AF_CJKMetrics metrics,AF_Scaler scaler,AF_Dimension dim)575 af_cjk_metrics_scale_dim( AF_CJKMetrics metrics, 576 AF_Scaler scaler, 577 AF_Dimension dim ) 578 { 579 FT_Fixed scale; 580 FT_Pos delta; 581 AF_CJKAxis axis; 582 FT_UInt nn; 583 584 585 axis = &metrics->axis[dim]; 586 587 if ( dim == AF_DIMENSION_HORZ ) 588 { 589 scale = scaler->x_scale; 590 delta = scaler->x_delta; 591 } 592 else 593 { 594 scale = scaler->y_scale; 595 delta = scaler->y_delta; 596 } 597 598 if ( axis->org_scale == scale && axis->org_delta == delta ) 599 return; 600 601 axis->org_scale = scale; 602 axis->org_delta = delta; 603 604 axis->scale = scale; 605 axis->delta = delta; 606 607 /* scale the blue zones */ 608 for ( nn = 0; nn < axis->blue_count; nn++ ) 609 { 610 AF_CJKBlue blue = &axis->blues[nn]; 611 FT_Pos dist; 612 613 614 blue->ref.cur = FT_MulFix( blue->ref.org, scale ) + delta; 615 blue->ref.fit = blue->ref.cur; 616 blue->shoot.cur = FT_MulFix( blue->shoot.org, scale ) + delta; 617 blue->shoot.fit = blue->shoot.cur; 618 blue->flags &= ~AF_CJK_BLUE_ACTIVE; 619 620 /* a blue zone is only active if it is less than 3/4 pixels tall */ 621 dist = FT_MulFix( blue->ref.org - blue->shoot.org, scale ); 622 if ( dist <= 48 && dist >= -48 ) 623 { 624 FT_Pos delta1, delta2; 625 626 627 blue->ref.fit = FT_PIX_ROUND( blue->ref.cur ); 628 629 /* shoot is under shoot for cjk */ 630 delta1 = FT_DivFix( blue->ref.fit, scale ) - blue->shoot.org; 631 delta2 = delta1; 632 if ( delta1 < 0 ) 633 delta2 = -delta2; 634 635 delta2 = FT_MulFix( delta2, scale ); 636 637 FT_TRACE5(( "delta: %d", delta1 )); 638 if ( delta2 < 32 ) 639 delta2 = 0; 640 #if 0 641 else if ( delta2 < 64 ) 642 delta2 = 32 + ( ( ( delta2 - 32 ) + 16 ) & ~31 ); 643 #endif 644 else 645 delta2 = FT_PIX_ROUND( delta2 ); 646 FT_TRACE5(( "/%d\n", delta2 )); 647 648 if ( delta1 < 0 ) 649 delta2 = -delta2; 650 651 blue->shoot.fit = blue->ref.fit - delta2; 652 653 FT_TRACE5(( ">> active cjk blue zone %c%d[%ld/%ld]: " 654 "ref: cur=%.2f fit=%.2f shoot: cur=%.2f fit=%.2f\n", 655 ( dim == AF_DIMENSION_HORZ ) ? 'H' : 'V', 656 nn, blue->ref.org, blue->shoot.org, 657 blue->ref.cur / 64.0, blue->ref.fit / 64.0, 658 blue->shoot.cur / 64.0, blue->shoot.fit / 64.0 )); 659 660 blue->flags |= AF_CJK_BLUE_ACTIVE; 661 } 662 } 663 } 664 665 666 FT_LOCAL_DEF( void ) af_cjk_metrics_scale(AF_CJKMetrics metrics,AF_Scaler scaler)667 af_cjk_metrics_scale( AF_CJKMetrics metrics, 668 AF_Scaler scaler ) 669 { 670 metrics->root.scaler = *scaler; 671 672 af_cjk_metrics_scale_dim( metrics, scaler, AF_DIMENSION_HORZ ); 673 af_cjk_metrics_scale_dim( metrics, scaler, AF_DIMENSION_VERT ); 674 } 675 676 677 /*************************************************************************/ 678 /*************************************************************************/ 679 /***** *****/ 680 /***** C J K G L Y P H A N A L Y S I S *****/ 681 /***** *****/ 682 /*************************************************************************/ 683 /*************************************************************************/ 684 685 static FT_Error af_cjk_hints_compute_segments(AF_GlyphHints hints,AF_Dimension dim)686 af_cjk_hints_compute_segments( AF_GlyphHints hints, 687 AF_Dimension dim ) 688 { 689 AF_AxisHints axis = &hints->axis[dim]; 690 AF_Segment segments = axis->segments; 691 AF_Segment segment_limit = segments + axis->num_segments; 692 FT_Error error; 693 AF_Segment seg; 694 695 696 error = af_latin_hints_compute_segments( hints, dim ); 697 if ( error ) 698 return error; 699 700 /* a segment is round if it doesn't have successive */ 701 /* on-curve points. */ 702 for ( seg = segments; seg < segment_limit; seg++ ) 703 { 704 AF_Point pt = seg->first; 705 AF_Point last = seg->last; 706 AF_Flags f0 = (AF_Flags)( pt->flags & AF_FLAG_CONTROL ); 707 AF_Flags f1; 708 709 710 seg->flags &= ~AF_EDGE_ROUND; 711 712 for ( ; pt != last; f0 = f1 ) 713 { 714 pt = pt->next; 715 f1 = (AF_Flags)( pt->flags & AF_FLAG_CONTROL ); 716 717 if ( !f0 && !f1 ) 718 break; 719 720 if ( pt == last ) 721 seg->flags |= AF_EDGE_ROUND; 722 } 723 } 724 725 return FT_Err_Ok; 726 } 727 728 729 static void af_cjk_hints_link_segments(AF_GlyphHints hints,AF_Dimension dim)730 af_cjk_hints_link_segments( AF_GlyphHints hints, 731 AF_Dimension dim ) 732 { 733 AF_AxisHints axis = &hints->axis[dim]; 734 AF_Segment segments = axis->segments; 735 AF_Segment segment_limit = segments + axis->num_segments; 736 AF_Direction major_dir = axis->major_dir; 737 AF_Segment seg1, seg2; 738 FT_Pos len_threshold; 739 FT_Pos dist_threshold; 740 741 742 len_threshold = AF_LATIN_CONSTANT( hints->metrics, 8 ); 743 744 dist_threshold = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale 745 : hints->y_scale; 746 dist_threshold = FT_DivFix( 64 * 3, dist_threshold ); 747 748 /* now compare each segment to the others */ 749 for ( seg1 = segments; seg1 < segment_limit; seg1++ ) 750 { 751 /* the fake segments are for metrics hinting only */ 752 if ( seg1->first == seg1->last ) 753 continue; 754 755 if ( seg1->dir != major_dir ) 756 continue; 757 758 for ( seg2 = segments; seg2 < segment_limit; seg2++ ) 759 if ( seg2 != seg1 && seg1->dir + seg2->dir == 0 ) 760 { 761 FT_Pos dist = seg2->pos - seg1->pos; 762 763 764 if ( dist < 0 ) 765 continue; 766 767 { 768 FT_Pos min = seg1->min_coord; 769 FT_Pos max = seg1->max_coord; 770 FT_Pos len; 771 772 773 if ( min < seg2->min_coord ) 774 min = seg2->min_coord; 775 776 if ( max > seg2->max_coord ) 777 max = seg2->max_coord; 778 779 len = max - min; 780 if ( len >= len_threshold ) 781 { 782 if ( dist * 8 < seg1->score * 9 && 783 ( dist * 8 < seg1->score * 7 || seg1->len < len ) ) 784 { 785 seg1->score = dist; 786 seg1->len = len; 787 seg1->link = seg2; 788 } 789 790 if ( dist * 8 < seg2->score * 9 && 791 ( dist * 8 < seg2->score * 7 || seg2->len < len ) ) 792 { 793 seg2->score = dist; 794 seg2->len = len; 795 seg2->link = seg1; 796 } 797 } 798 } 799 } 800 } 801 802 /* 803 * now compute the `serif' segments 804 * 805 * In Hanzi, some strokes are wider on one or both of the ends. 806 * We either identify the stems on the ends as serifs or remove 807 * the linkage, depending on the length of the stems. 808 * 809 */ 810 811 { 812 AF_Segment link1, link2; 813 814 815 for ( seg1 = segments; seg1 < segment_limit; seg1++ ) 816 { 817 link1 = seg1->link; 818 if ( !link1 || link1->link != seg1 || link1->pos <= seg1->pos ) 819 continue; 820 821 if ( seg1->score >= dist_threshold ) 822 continue; 823 824 for ( seg2 = segments; seg2 < segment_limit; seg2++ ) 825 { 826 if ( seg2->pos > seg1->pos || seg1 == seg2 ) 827 continue; 828 829 link2 = seg2->link; 830 if ( !link2 || link2->link != seg2 || link2->pos < link1->pos ) 831 continue; 832 833 if ( seg1->pos == seg2->pos && link1->pos == link2->pos ) 834 continue; 835 836 if ( seg2->score <= seg1->score || seg1->score * 4 <= seg2->score ) 837 continue; 838 839 /* seg2 < seg1 < link1 < link2 */ 840 841 if ( seg1->len >= seg2->len * 3 ) 842 { 843 AF_Segment seg; 844 845 846 for ( seg = segments; seg < segment_limit; seg++ ) 847 { 848 AF_Segment link = seg->link; 849 850 851 if ( link == seg2 ) 852 { 853 seg->link = 0; 854 seg->serif = link1; 855 } 856 else if ( link == link2 ) 857 { 858 seg->link = 0; 859 seg->serif = seg1; 860 } 861 } 862 } 863 else 864 { 865 seg1->link = link1->link = 0; 866 867 break; 868 } 869 } 870 } 871 } 872 873 for ( seg1 = segments; seg1 < segment_limit; seg1++ ) 874 { 875 seg2 = seg1->link; 876 877 if ( seg2 ) 878 { 879 seg2->num_linked++; 880 if ( seg2->link != seg1 ) 881 { 882 seg1->link = 0; 883 884 if ( seg2->score < dist_threshold || seg1->score < seg2->score * 4 ) 885 seg1->serif = seg2->link; 886 else 887 seg2->num_linked--; 888 } 889 } 890 } 891 } 892 893 894 static FT_Error af_cjk_hints_compute_edges(AF_GlyphHints hints,AF_Dimension dim)895 af_cjk_hints_compute_edges( AF_GlyphHints hints, 896 AF_Dimension dim ) 897 { 898 AF_AxisHints axis = &hints->axis[dim]; 899 FT_Error error = FT_Err_Ok; 900 FT_Memory memory = hints->memory; 901 AF_CJKAxis laxis = &((AF_CJKMetrics)hints->metrics)->axis[dim]; 902 903 AF_Segment segments = axis->segments; 904 AF_Segment segment_limit = segments + axis->num_segments; 905 AF_Segment seg; 906 907 FT_Fixed scale; 908 FT_Pos edge_distance_threshold; 909 910 911 axis->num_edges = 0; 912 913 scale = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale 914 : hints->y_scale; 915 916 /*********************************************************************/ 917 /* */ 918 /* We begin by generating a sorted table of edges for the current */ 919 /* direction. To do so, we simply scan each segment and try to find */ 920 /* an edge in our table that corresponds to its position. */ 921 /* */ 922 /* If no edge is found, we create and insert a new edge in the */ 923 /* sorted table. Otherwise, we simply add the segment to the edge's */ 924 /* list which is then processed in the second step to compute the */ 925 /* edge's properties. */ 926 /* */ 927 /* Note that the edges table is sorted along the segment/edge */ 928 /* position. */ 929 /* */ 930 /*********************************************************************/ 931 932 edge_distance_threshold = FT_MulFix( laxis->edge_distance_threshold, 933 scale ); 934 if ( edge_distance_threshold > 64 / 4 ) 935 edge_distance_threshold = FT_DivFix( 64 / 4, scale ); 936 else 937 edge_distance_threshold = laxis->edge_distance_threshold; 938 939 for ( seg = segments; seg < segment_limit; seg++ ) 940 { 941 AF_Edge found = 0; 942 FT_Pos best = 0xFFFFU; 943 FT_Int ee; 944 945 946 /* look for an edge corresponding to the segment */ 947 for ( ee = 0; ee < axis->num_edges; ee++ ) 948 { 949 AF_Edge edge = axis->edges + ee; 950 FT_Pos dist; 951 952 953 if ( edge->dir != seg->dir ) 954 continue; 955 956 dist = seg->pos - edge->fpos; 957 if ( dist < 0 ) 958 dist = -dist; 959 960 if ( dist < edge_distance_threshold && dist < best ) 961 { 962 AF_Segment link = seg->link; 963 964 965 /* check whether all linked segments of the candidate edge */ 966 /* can make a single edge. */ 967 if ( link ) 968 { 969 AF_Segment seg1 = edge->first; 970 FT_Pos dist2 = 0; 971 972 973 do 974 { 975 AF_Segment link1 = seg1->link; 976 977 978 if ( link1 ) 979 { 980 dist2 = AF_SEGMENT_DIST( link, link1 ); 981 if ( dist2 >= edge_distance_threshold ) 982 break; 983 } 984 985 } while ( ( seg1 = seg1->edge_next ) != edge->first ); 986 987 if ( dist2 >= edge_distance_threshold ) 988 continue; 989 } 990 991 best = dist; 992 found = edge; 993 } 994 } 995 996 if ( !found ) 997 { 998 AF_Edge edge; 999 1000 1001 /* insert a new edge in the list and */ 1002 /* sort according to the position */ 1003 error = af_axis_hints_new_edge( axis, seg->pos, 1004 (AF_Direction)seg->dir, 1005 memory, &edge ); 1006 if ( error ) 1007 goto Exit; 1008 1009 /* add the segment to the new edge's list */ 1010 FT_ZERO( edge ); 1011 1012 edge->first = seg; 1013 edge->last = seg; 1014 edge->fpos = seg->pos; 1015 edge->opos = edge->pos = FT_MulFix( seg->pos, scale ); 1016 seg->edge_next = seg; 1017 edge->dir = seg->dir; 1018 } 1019 else 1020 { 1021 /* if an edge was found, simply add the segment to the edge's */ 1022 /* list */ 1023 seg->edge_next = found->first; 1024 found->last->edge_next = seg; 1025 found->last = seg; 1026 } 1027 } 1028 1029 /*********************************************************************/ 1030 /* */ 1031 /* Good, we now compute each edge's properties according to segments */ 1032 /* found on its position. Basically, these are as follows. */ 1033 /* */ 1034 /* - edge's main direction */ 1035 /* - stem edge, serif edge or both (which defaults to stem then) */ 1036 /* - rounded edge, straight or both (which defaults to straight) */ 1037 /* - link for edge */ 1038 /* */ 1039 /*********************************************************************/ 1040 1041 /* first of all, set the `edge' field in each segment -- this is */ 1042 /* required in order to compute edge links */ 1043 /* */ 1044 /* Note that removing this loop and setting the `edge' field of each */ 1045 /* segment directly in the code above slows down execution speed for */ 1046 /* some reasons on platforms like the Sun. */ 1047 1048 { 1049 AF_Edge edges = axis->edges; 1050 AF_Edge edge_limit = edges + axis->num_edges; 1051 AF_Edge edge; 1052 1053 1054 for ( edge = edges; edge < edge_limit; edge++ ) 1055 { 1056 seg = edge->first; 1057 if ( seg ) 1058 do 1059 { 1060 seg->edge = edge; 1061 seg = seg->edge_next; 1062 1063 } while ( seg != edge->first ); 1064 } 1065 1066 /* now compute each edge properties */ 1067 for ( edge = edges; edge < edge_limit; edge++ ) 1068 { 1069 FT_Int is_round = 0; /* does it contain round segments? */ 1070 FT_Int is_straight = 0; /* does it contain straight segments? */ 1071 1072 1073 seg = edge->first; 1074 1075 do 1076 { 1077 FT_Bool is_serif; 1078 1079 1080 /* check for roundness of segment */ 1081 if ( seg->flags & AF_EDGE_ROUND ) 1082 is_round++; 1083 else 1084 is_straight++; 1085 1086 /* check for links -- if seg->serif is set, then seg->link must */ 1087 /* be ignored */ 1088 is_serif = (FT_Bool)( seg->serif && seg->serif->edge != edge ); 1089 1090 if ( seg->link || is_serif ) 1091 { 1092 AF_Edge edge2; 1093 AF_Segment seg2; 1094 1095 1096 edge2 = edge->link; 1097 seg2 = seg->link; 1098 1099 if ( is_serif ) 1100 { 1101 seg2 = seg->serif; 1102 edge2 = edge->serif; 1103 } 1104 1105 if ( edge2 ) 1106 { 1107 FT_Pos edge_delta; 1108 FT_Pos seg_delta; 1109 1110 1111 edge_delta = edge->fpos - edge2->fpos; 1112 if ( edge_delta < 0 ) 1113 edge_delta = -edge_delta; 1114 1115 seg_delta = AF_SEGMENT_DIST( seg, seg2 ); 1116 1117 if ( seg_delta < edge_delta ) 1118 edge2 = seg2->edge; 1119 } 1120 else 1121 edge2 = seg2->edge; 1122 1123 if ( is_serif ) 1124 { 1125 edge->serif = edge2; 1126 edge2->flags |= AF_EDGE_SERIF; 1127 } 1128 else 1129 edge->link = edge2; 1130 } 1131 1132 seg = seg->edge_next; 1133 1134 } while ( seg != edge->first ); 1135 1136 /* set the round/straight flags */ 1137 edge->flags = AF_EDGE_NORMAL; 1138 1139 if ( is_round > 0 && is_round >= is_straight ) 1140 edge->flags |= AF_EDGE_ROUND; 1141 1142 /* get rid of serifs if link is set */ 1143 /* XXX: This gets rid of many unpleasant artefacts! */ 1144 /* Example: the `c' in cour.pfa at size 13 */ 1145 1146 if ( edge->serif && edge->link ) 1147 edge->serif = 0; 1148 } 1149 } 1150 1151 Exit: 1152 return error; 1153 } 1154 1155 1156 static FT_Error af_cjk_hints_detect_features(AF_GlyphHints hints,AF_Dimension dim)1157 af_cjk_hints_detect_features( AF_GlyphHints hints, 1158 AF_Dimension dim ) 1159 { 1160 FT_Error error; 1161 1162 1163 error = af_cjk_hints_compute_segments( hints, dim ); 1164 if ( !error ) 1165 { 1166 af_cjk_hints_link_segments( hints, dim ); 1167 1168 error = af_cjk_hints_compute_edges( hints, dim ); 1169 } 1170 return error; 1171 } 1172 1173 1174 FT_LOCAL_DEF( void ) af_cjk_hints_compute_blue_edges(AF_GlyphHints hints,AF_CJKMetrics metrics,AF_Dimension dim)1175 af_cjk_hints_compute_blue_edges( AF_GlyphHints hints, 1176 AF_CJKMetrics metrics, 1177 AF_Dimension dim ) 1178 { 1179 AF_AxisHints axis = &hints->axis[dim]; 1180 AF_Edge edge = axis->edges; 1181 AF_Edge edge_limit = edge + axis->num_edges; 1182 AF_CJKAxis cjk = &metrics->axis[dim]; 1183 FT_Fixed scale = cjk->scale; 1184 FT_Pos best_dist0; /* initial threshold */ 1185 1186 1187 /* compute the initial threshold as a fraction of the EM size */ 1188 best_dist0 = FT_MulFix( metrics->units_per_em / 40, scale ); 1189 1190 if ( best_dist0 > 64 / 2 ) /* maximum 1/2 pixel */ 1191 best_dist0 = 64 / 2; 1192 1193 /* compute which blue zones are active, i.e. have their scaled */ 1194 /* size < 3/4 pixels */ 1195 1196 /* If the distant between an edge and a blue zone is shorter than */ 1197 /* best_dist0, set the blue zone for the edge. Then search for */ 1198 /* the blue zone with the smallest best_dist to the edge. */ 1199 1200 for ( ; edge < edge_limit; edge++ ) 1201 { 1202 FT_UInt bb; 1203 AF_Width best_blue = NULL; 1204 FT_Pos best_dist = best_dist0; 1205 1206 1207 for ( bb = 0; bb < cjk->blue_count; bb++ ) 1208 { 1209 AF_CJKBlue blue = cjk->blues + bb; 1210 FT_Bool is_top_right_blue, is_major_dir; 1211 1212 1213 /* skip inactive blue zones (i.e., those that are too small) */ 1214 if ( !( blue->flags & AF_CJK_BLUE_ACTIVE ) ) 1215 continue; 1216 1217 /* if it is a top zone, check for right edges -- if it is a bottom */ 1218 /* zone, check for left edges */ 1219 /* */ 1220 /* of course, that's for TrueType */ 1221 is_top_right_blue = 1222 FT_BOOL( ( ( blue->flags & AF_CJK_BLUE_IS_TOP ) != 0 ) || 1223 ( ( blue->flags & AF_CJK_BLUE_IS_RIGHT ) != 0 ) ); 1224 is_major_dir = FT_BOOL( edge->dir == axis->major_dir ); 1225 1226 /* if it is a top zone, the edge must be against the major */ 1227 /* direction; if it is a bottom zone, it must be in the major */ 1228 /* direction */ 1229 if ( is_top_right_blue ^ is_major_dir ) 1230 { 1231 FT_Pos dist; 1232 AF_Width compare; 1233 1234 1235 /* Compare the edge to the closest blue zone type */ 1236 if ( FT_ABS( edge->fpos - blue->ref.org ) > 1237 FT_ABS( edge->fpos - blue->shoot.org ) ) 1238 compare = &blue->shoot; 1239 else 1240 compare = &blue->ref; 1241 1242 dist = edge->fpos - compare->org; 1243 if ( dist < 0 ) 1244 dist = -dist; 1245 1246 dist = FT_MulFix( dist, scale ); 1247 if ( dist < best_dist ) 1248 { 1249 best_dist = dist; 1250 best_blue = compare; 1251 } 1252 } 1253 } 1254 1255 if ( best_blue ) 1256 edge->blue_edge = best_blue; 1257 } 1258 } 1259 1260 1261 FT_LOCAL_DEF( FT_Error ) af_cjk_hints_init(AF_GlyphHints hints,AF_CJKMetrics metrics)1262 af_cjk_hints_init( AF_GlyphHints hints, 1263 AF_CJKMetrics metrics ) 1264 { 1265 FT_Render_Mode mode; 1266 FT_UInt32 scaler_flags, other_flags; 1267 1268 1269 af_glyph_hints_rescale( hints, (AF_ScriptMetrics)metrics ); 1270 1271 /* 1272 * correct x_scale and y_scale when needed, since they may have 1273 * been modified af_cjk_scale_dim above 1274 */ 1275 hints->x_scale = metrics->axis[AF_DIMENSION_HORZ].scale; 1276 hints->x_delta = metrics->axis[AF_DIMENSION_HORZ].delta; 1277 hints->y_scale = metrics->axis[AF_DIMENSION_VERT].scale; 1278 hints->y_delta = metrics->axis[AF_DIMENSION_VERT].delta; 1279 1280 /* compute flags depending on render mode, etc. */ 1281 mode = metrics->root.scaler.render_mode; 1282 1283 #ifdef AF_CONFIG_OPTION_USE_WARPER 1284 if ( mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V ) 1285 metrics->root.scaler.render_mode = mode = FT_RENDER_MODE_NORMAL; 1286 #endif 1287 1288 scaler_flags = hints->scaler_flags; 1289 other_flags = 0; 1290 1291 /* 1292 * We snap the width of vertical stems for the monochrome and 1293 * horizontal LCD rendering targets only. 1294 */ 1295 if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD ) 1296 other_flags |= AF_LATIN_HINTS_HORZ_SNAP; 1297 1298 /* 1299 * We snap the width of horizontal stems for the monochrome and 1300 * vertical LCD rendering targets only. 1301 */ 1302 if ( mode == FT_RENDER_MODE_MONO || mode == FT_RENDER_MODE_LCD_V ) 1303 other_flags |= AF_LATIN_HINTS_VERT_SNAP; 1304 1305 /* 1306 * We adjust stems to full pixels only if we don't use the `light' mode. 1307 */ 1308 if ( mode != FT_RENDER_MODE_LIGHT ) 1309 other_flags |= AF_LATIN_HINTS_STEM_ADJUST; 1310 1311 if ( mode == FT_RENDER_MODE_MONO ) 1312 other_flags |= AF_LATIN_HINTS_MONO; 1313 1314 scaler_flags |= AF_SCALER_FLAG_NO_ADVANCE; 1315 1316 hints->scaler_flags = scaler_flags; 1317 hints->other_flags = other_flags; 1318 1319 return 0; 1320 } 1321 1322 1323 /*************************************************************************/ 1324 /*************************************************************************/ 1325 /***** *****/ 1326 /***** C J K G L Y P H G R I D - F I T T I N G *****/ 1327 /***** *****/ 1328 /*************************************************************************/ 1329 /*************************************************************************/ 1330 1331 /* snap a given width in scaled coordinates to one of the */ 1332 /* current standard widths */ 1333 1334 static FT_Pos af_cjk_snap_width(AF_Width widths,FT_Int count,FT_Pos width)1335 af_cjk_snap_width( AF_Width widths, 1336 FT_Int count, 1337 FT_Pos width ) 1338 { 1339 int n; 1340 FT_Pos best = 64 + 32 + 2; 1341 FT_Pos reference = width; 1342 FT_Pos scaled; 1343 1344 1345 for ( n = 0; n < count; n++ ) 1346 { 1347 FT_Pos w; 1348 FT_Pos dist; 1349 1350 1351 w = widths[n].cur; 1352 dist = width - w; 1353 if ( dist < 0 ) 1354 dist = -dist; 1355 if ( dist < best ) 1356 { 1357 best = dist; 1358 reference = w; 1359 } 1360 } 1361 1362 scaled = FT_PIX_ROUND( reference ); 1363 1364 if ( width >= reference ) 1365 { 1366 if ( width < scaled + 48 ) 1367 width = reference; 1368 } 1369 else 1370 { 1371 if ( width > scaled - 48 ) 1372 width = reference; 1373 } 1374 1375 return width; 1376 } 1377 1378 1379 /* compute the snapped width of a given stem */ 1380 1381 static FT_Pos af_cjk_compute_stem_width(AF_GlyphHints hints,AF_Dimension dim,FT_Pos width,AF_Edge_Flags base_flags,AF_Edge_Flags stem_flags)1382 af_cjk_compute_stem_width( AF_GlyphHints hints, 1383 AF_Dimension dim, 1384 FT_Pos width, 1385 AF_Edge_Flags base_flags, 1386 AF_Edge_Flags stem_flags ) 1387 { 1388 AF_CJKMetrics metrics = (AF_CJKMetrics) hints->metrics; 1389 AF_CJKAxis axis = & metrics->axis[dim]; 1390 FT_Pos dist = width; 1391 FT_Int sign = 0; 1392 FT_Bool vertical = FT_BOOL( dim == AF_DIMENSION_VERT ); 1393 1394 FT_UNUSED( base_flags ); 1395 FT_UNUSED( stem_flags ); 1396 1397 1398 if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) 1399 return width; 1400 1401 if ( dist < 0 ) 1402 { 1403 dist = -width; 1404 sign = 1; 1405 } 1406 1407 if ( ( vertical && !AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) || 1408 ( !vertical && !AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) ) 1409 { 1410 /* smooth hinting process: very lightly quantize the stem width */ 1411 1412 if ( axis->width_count > 0 ) 1413 { 1414 if ( FT_ABS( dist - axis->widths[0].cur ) < 40 ) 1415 { 1416 dist = axis->widths[0].cur; 1417 if ( dist < 48 ) 1418 dist = 48; 1419 1420 goto Done_Width; 1421 } 1422 } 1423 1424 if ( dist < 54 ) 1425 dist += ( 54 - dist ) / 2 ; 1426 else if ( dist < 3 * 64 ) 1427 { 1428 FT_Pos delta; 1429 1430 1431 delta = dist & 63; 1432 dist &= -64; 1433 1434 if ( delta < 10 ) 1435 dist += delta; 1436 else if ( delta < 22 ) 1437 dist += 10; 1438 else if ( delta < 42 ) 1439 dist += delta; 1440 else if ( delta < 54 ) 1441 dist += 54; 1442 else 1443 dist += delta; 1444 } 1445 } 1446 else 1447 { 1448 /* strong hinting process: snap the stem width to integer pixels */ 1449 1450 dist = af_cjk_snap_width( axis->widths, axis->width_count, dist ); 1451 1452 if ( vertical ) 1453 { 1454 /* in the case of vertical hinting, always round */ 1455 /* the stem heights to integer pixels */ 1456 1457 if ( dist >= 64 ) 1458 dist = ( dist + 16 ) & ~63; 1459 else 1460 dist = 64; 1461 } 1462 else 1463 { 1464 if ( AF_LATIN_HINTS_DO_MONO( hints ) ) 1465 { 1466 /* monochrome horizontal hinting: snap widths to integer pixels */ 1467 /* with a different threshold */ 1468 1469 if ( dist < 64 ) 1470 dist = 64; 1471 else 1472 dist = ( dist + 32 ) & ~63; 1473 } 1474 else 1475 { 1476 /* for horizontal anti-aliased hinting, we adopt a more subtle */ 1477 /* approach: we strengthen small stems, round stems whose size */ 1478 /* is between 1 and 2 pixels to an integer, otherwise nothing */ 1479 1480 if ( dist < 48 ) 1481 dist = ( dist + 64 ) >> 1; 1482 1483 else if ( dist < 128 ) 1484 dist = ( dist + 22 ) & ~63; 1485 else 1486 /* round otherwise to prevent color fringes in LCD mode */ 1487 dist = ( dist + 32 ) & ~63; 1488 } 1489 } 1490 } 1491 1492 Done_Width: 1493 if ( sign ) 1494 dist = -dist; 1495 1496 return dist; 1497 } 1498 1499 1500 /* align one stem edge relative to the previous stem edge */ 1501 1502 static void af_cjk_align_linked_edge(AF_GlyphHints hints,AF_Dimension dim,AF_Edge base_edge,AF_Edge stem_edge)1503 af_cjk_align_linked_edge( AF_GlyphHints hints, 1504 AF_Dimension dim, 1505 AF_Edge base_edge, 1506 AF_Edge stem_edge ) 1507 { 1508 FT_Pos dist = stem_edge->opos - base_edge->opos; 1509 1510 FT_Pos fitted_width = af_cjk_compute_stem_width( 1511 hints, dim, dist, 1512 (AF_Edge_Flags)base_edge->flags, 1513 (AF_Edge_Flags)stem_edge->flags ); 1514 1515 1516 stem_edge->pos = base_edge->pos + fitted_width; 1517 } 1518 1519 1520 static void af_cjk_align_serif_edge(AF_GlyphHints hints,AF_Edge base,AF_Edge serif)1521 af_cjk_align_serif_edge( AF_GlyphHints hints, 1522 AF_Edge base, 1523 AF_Edge serif ) 1524 { 1525 FT_UNUSED( hints ); 1526 1527 serif->pos = base->pos + ( serif->opos - base->opos ); 1528 } 1529 1530 1531 /*************************************************************************/ 1532 /*************************************************************************/ 1533 /*************************************************************************/ 1534 /**** ****/ 1535 /**** E D G E H I N T I N G ****/ 1536 /**** ****/ 1537 /*************************************************************************/ 1538 /*************************************************************************/ 1539 /*************************************************************************/ 1540 1541 1542 #define AF_LIGHT_MODE_MAX_HORZ_GAP 9 1543 #define AF_LIGHT_MODE_MAX_VERT_GAP 15 1544 #define AF_LIGHT_MODE_MAX_DELTA_ABS 14 1545 1546 1547 static FT_Pos af_hint_normal_stem(AF_GlyphHints hints,AF_Edge edge,AF_Edge edge2,FT_Pos anchor,AF_Dimension dim)1548 af_hint_normal_stem( AF_GlyphHints hints, 1549 AF_Edge edge, 1550 AF_Edge edge2, 1551 FT_Pos anchor, 1552 AF_Dimension dim ) 1553 { 1554 FT_Pos org_len, cur_len, org_center; 1555 FT_Pos cur_pos1, cur_pos2; 1556 FT_Pos d_off1, u_off1, d_off2, u_off2, delta; 1557 FT_Pos offset; 1558 FT_Pos threshold = 64; 1559 1560 1561 if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) 1562 { 1563 if ( ( edge->flags & AF_EDGE_ROUND ) && 1564 ( edge2->flags & AF_EDGE_ROUND ) ) 1565 { 1566 if ( dim == AF_DIMENSION_VERT ) 1567 threshold = 64 - AF_LIGHT_MODE_MAX_HORZ_GAP; 1568 else 1569 threshold = 64 - AF_LIGHT_MODE_MAX_VERT_GAP; 1570 } 1571 else 1572 { 1573 if ( dim == AF_DIMENSION_VERT ) 1574 threshold = 64 - AF_LIGHT_MODE_MAX_HORZ_GAP / 3; 1575 else 1576 threshold = 64 - AF_LIGHT_MODE_MAX_VERT_GAP / 3; 1577 } 1578 } 1579 1580 org_len = edge2->opos - edge->opos; 1581 cur_len = af_cjk_compute_stem_width( hints, dim, org_len, 1582 (AF_Edge_Flags)edge->flags, 1583 (AF_Edge_Flags)edge2->flags ); 1584 1585 org_center = ( edge->opos + edge2->opos ) / 2 + anchor; 1586 cur_pos1 = org_center - cur_len / 2; 1587 cur_pos2 = cur_pos1 + cur_len; 1588 d_off1 = cur_pos1 - FT_PIX_FLOOR( cur_pos1 ); 1589 d_off2 = cur_pos2 - FT_PIX_FLOOR( cur_pos2 ); 1590 u_off1 = 64 - d_off1; 1591 u_off2 = 64 - d_off2; 1592 delta = 0; 1593 1594 1595 if ( d_off1 == 0 || d_off2 == 0 ) 1596 goto Exit; 1597 1598 if ( cur_len <= threshold ) 1599 { 1600 if ( d_off2 < cur_len ) 1601 { 1602 if ( u_off1 <= d_off2 ) 1603 delta = u_off1; 1604 else 1605 delta = -d_off2; 1606 } 1607 1608 goto Exit; 1609 } 1610 1611 if ( threshold < 64 ) 1612 { 1613 if ( d_off1 >= threshold || u_off1 >= threshold || 1614 d_off2 >= threshold || u_off2 >= threshold ) 1615 goto Exit; 1616 } 1617 1618 offset = cur_len & 63; 1619 1620 if ( offset < 32 ) 1621 { 1622 if ( u_off1 <= offset || d_off2 <= offset ) 1623 goto Exit; 1624 } 1625 else 1626 offset = 64 - threshold; 1627 1628 d_off1 = threshold - u_off1; 1629 u_off1 = u_off1 - offset; 1630 u_off2 = threshold - d_off2; 1631 d_off2 = d_off2 - offset; 1632 1633 if ( d_off1 <= u_off1 ) 1634 u_off1 = -d_off1; 1635 1636 if ( d_off2 <= u_off2 ) 1637 u_off2 = -d_off2; 1638 1639 if ( FT_ABS( u_off1 ) <= FT_ABS( u_off2 ) ) 1640 delta = u_off1; 1641 else 1642 delta = u_off2; 1643 1644 Exit: 1645 1646 #if 1 1647 if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) 1648 { 1649 if ( delta > AF_LIGHT_MODE_MAX_DELTA_ABS ) 1650 delta = AF_LIGHT_MODE_MAX_DELTA_ABS; 1651 else if ( delta < -AF_LIGHT_MODE_MAX_DELTA_ABS ) 1652 delta = -AF_LIGHT_MODE_MAX_DELTA_ABS; 1653 } 1654 #endif 1655 1656 cur_pos1 += delta; 1657 1658 if ( edge->opos < edge2->opos ) 1659 { 1660 edge->pos = cur_pos1; 1661 edge2->pos = cur_pos1 + cur_len; 1662 } 1663 else 1664 { 1665 edge->pos = cur_pos1 + cur_len; 1666 edge2->pos = cur_pos1; 1667 } 1668 1669 return delta; 1670 } 1671 1672 1673 static void af_cjk_hint_edges(AF_GlyphHints hints,AF_Dimension dim)1674 af_cjk_hint_edges( AF_GlyphHints hints, 1675 AF_Dimension dim ) 1676 { 1677 AF_AxisHints axis = &hints->axis[dim]; 1678 AF_Edge edges = axis->edges; 1679 AF_Edge edge_limit = edges + axis->num_edges; 1680 FT_PtrDist n_edges; 1681 AF_Edge edge; 1682 AF_Edge anchor = 0; 1683 FT_Pos delta = 0; 1684 FT_Int skipped = 0; 1685 FT_Bool has_last_stem = FALSE; 1686 FT_Pos last_stem_pos = 0; 1687 1688 1689 /* we begin by aligning all stems relative to the blue zone */ 1690 FT_TRACE5(( "==== cjk hinting %s edges =====\n", 1691 dim == AF_DIMENSION_HORZ ? "vertical" : "horizontal" )); 1692 1693 if ( AF_HINTS_DO_BLUES( hints ) ) 1694 { 1695 for ( edge = edges; edge < edge_limit; edge++ ) 1696 { 1697 AF_Width blue; 1698 AF_Edge edge1, edge2; 1699 1700 1701 if ( edge->flags & AF_EDGE_DONE ) 1702 continue; 1703 1704 blue = edge->blue_edge; 1705 edge1 = NULL; 1706 edge2 = edge->link; 1707 1708 if ( blue ) 1709 { 1710 edge1 = edge; 1711 } 1712 else if ( edge2 && edge2->blue_edge ) 1713 { 1714 blue = edge2->blue_edge; 1715 edge1 = edge2; 1716 edge2 = edge; 1717 } 1718 1719 if ( !edge1 ) 1720 continue; 1721 1722 FT_TRACE5(( "CJKBLUE: edge %d @%d (opos=%.2f) snapped to (%.2f), " 1723 "was (%.2f)\n", 1724 edge1-edges, edge1->fpos, edge1->opos / 64.0, blue->fit / 64.0, 1725 edge1->pos / 64.0 )); 1726 1727 edge1->pos = blue->fit; 1728 edge1->flags |= AF_EDGE_DONE; 1729 1730 if ( edge2 && !edge2->blue_edge ) 1731 { 1732 af_cjk_align_linked_edge( hints, dim, edge1, edge2 ); 1733 edge2->flags |= AF_EDGE_DONE; 1734 } 1735 1736 if ( !anchor ) 1737 anchor = edge; 1738 } 1739 } 1740 1741 /* now we align all stem edges. */ 1742 for ( edge = edges; edge < edge_limit; edge++ ) 1743 { 1744 AF_Edge edge2; 1745 1746 1747 if ( edge->flags & AF_EDGE_DONE ) 1748 continue; 1749 1750 /* skip all non-stem edges */ 1751 edge2 = edge->link; 1752 if ( !edge2 ) 1753 { 1754 skipped++; 1755 continue; 1756 } 1757 1758 /* Some CJK characters have so many stems that 1759 * the hinter is likely to merge two adjacent ones. 1760 * To solve this problem, if either edge of a stem 1761 * is too close to the previous one, we avoid 1762 * aligning the two edges, but rather interpolate 1763 * their locations at the end of this function in 1764 * order to preserve the space between the stems. 1765 */ 1766 if ( has_last_stem && 1767 ( edge->pos < last_stem_pos + 64 || 1768 edge2->pos < last_stem_pos + 64 ) ) 1769 { 1770 skipped++; 1771 continue; 1772 } 1773 1774 /* now align the stem */ 1775 /* this should not happen, but it's better to be safe */ 1776 if ( edge2->blue_edge ) 1777 { 1778 FT_TRACE5(( "ASSERTION FAILED for edge %d\n", edge2-edges )); 1779 1780 af_cjk_align_linked_edge( hints, dim, edge2, edge ); 1781 edge->flags |= AF_EDGE_DONE; 1782 continue; 1783 } 1784 1785 if ( edge2 < edge ) 1786 { 1787 af_cjk_align_linked_edge( hints, dim, edge2, edge ); 1788 edge->flags |= AF_EDGE_DONE; 1789 /* We rarely reaches here it seems; 1790 * usually the two edges belonging 1791 * to one stem are marked as DONE together 1792 */ 1793 has_last_stem = TRUE; 1794 last_stem_pos = edge->pos; 1795 continue; 1796 } 1797 1798 if ( dim != AF_DIMENSION_VERT && !anchor ) 1799 { 1800 1801 #if 0 1802 if ( fixedpitch ) 1803 { 1804 AF_Edge left = edge; 1805 AF_Edge right = edge_limit - 1; 1806 AF_EdgeRec left1, left2, right1, right2; 1807 FT_Pos target, center1, center2; 1808 FT_Pos delta1, delta2, d1, d2; 1809 1810 1811 while ( right > left && !right->link ) 1812 right--; 1813 1814 left1 = *left; 1815 left2 = *left->link; 1816 right1 = *right->link; 1817 right2 = *right; 1818 1819 delta = ( ( ( hinter->pp2.x + 32 ) & -64 ) - hinter->pp2.x ) / 2; 1820 target = left->opos + ( right->opos - left->opos ) / 2 + delta - 16; 1821 1822 delta1 = delta; 1823 delta1 += af_hint_normal_stem( hints, left, left->link, 1824 delta1, 0 ); 1825 1826 if ( left->link != right ) 1827 af_hint_normal_stem( hints, right->link, right, delta1, 0 ); 1828 1829 center1 = left->pos + ( right->pos - left->pos ) / 2; 1830 1831 if ( center1 >= target ) 1832 delta2 = delta - 32; 1833 else 1834 delta2 = delta + 32; 1835 1836 delta2 += af_hint_normal_stem( hints, &left1, &left2, delta2, 0 ); 1837 1838 if ( delta1 != delta2 ) 1839 { 1840 if ( left->link != right ) 1841 af_hint_normal_stem( hints, &right1, &right2, delta2, 0 ); 1842 1843 center2 = left1.pos + ( right2.pos - left1.pos ) / 2; 1844 1845 d1 = center1 - target; 1846 d2 = center2 - target; 1847 1848 if ( FT_ABS( d2 ) < FT_ABS( d1 ) ) 1849 { 1850 left->pos = left1.pos; 1851 left->link->pos = left2.pos; 1852 1853 if ( left->link != right ) 1854 { 1855 right->link->pos = right1.pos; 1856 right->pos = right2.pos; 1857 } 1858 1859 delta1 = delta2; 1860 } 1861 } 1862 1863 delta = delta1; 1864 right->link->flags |= AF_EDGE_DONE; 1865 right->flags |= AF_EDGE_DONE; 1866 } 1867 else 1868 1869 #endif /* 0 */ 1870 1871 delta = af_hint_normal_stem( hints, edge, edge2, 0, 1872 AF_DIMENSION_HORZ ); 1873 } 1874 else 1875 af_hint_normal_stem( hints, edge, edge2, delta, dim ); 1876 1877 #if 0 1878 printf( "stem (%d,%d) adjusted (%.1f,%.1f)\n", 1879 edge - edges, edge2 - edges, 1880 ( edge->pos - edge->opos ) / 64.0, 1881 ( edge2->pos - edge2->opos ) / 64.0 ); 1882 #endif 1883 1884 anchor = edge; 1885 edge->flags |= AF_EDGE_DONE; 1886 edge2->flags |= AF_EDGE_DONE; 1887 has_last_stem = TRUE; 1888 last_stem_pos = edge2->pos; 1889 } 1890 1891 /* make sure that lowercase m's maintain their symmetry */ 1892 1893 /* In general, lowercase m's have six vertical edges if they are sans */ 1894 /* serif, or twelve if they are with serifs. This implementation is */ 1895 /* based on that assumption, and seems to work very well with most */ 1896 /* faces. However, if for a certain face this assumption is not */ 1897 /* true, the m is just rendered like before. In addition, any stem */ 1898 /* correction will only be applied to symmetrical glyphs (even if the */ 1899 /* glyph is not an m), so the potential for unwanted distortion is */ 1900 /* relatively low. */ 1901 1902 /* We don't handle horizontal edges since we can't easily assure that */ 1903 /* the third (lowest) stem aligns with the base line; it might end up */ 1904 /* one pixel higher or lower. */ 1905 1906 n_edges = edge_limit - edges; 1907 if ( dim == AF_DIMENSION_HORZ && ( n_edges == 6 || n_edges == 12 ) ) 1908 { 1909 AF_Edge edge1, edge2, edge3; 1910 FT_Pos dist1, dist2, span; 1911 1912 1913 if ( n_edges == 6 ) 1914 { 1915 edge1 = edges; 1916 edge2 = edges + 2; 1917 edge3 = edges + 4; 1918 } 1919 else 1920 { 1921 edge1 = edges + 1; 1922 edge2 = edges + 5; 1923 edge3 = edges + 9; 1924 } 1925 1926 dist1 = edge2->opos - edge1->opos; 1927 dist2 = edge3->opos - edge2->opos; 1928 1929 span = dist1 - dist2; 1930 if ( span < 0 ) 1931 span = -span; 1932 1933 if ( edge1->link == edge1 + 1 && 1934 edge2->link == edge2 + 1 && 1935 edge3->link == edge3 + 1 && span < 8 ) 1936 { 1937 delta = edge3->pos - ( 2 * edge2->pos - edge1->pos ); 1938 edge3->pos -= delta; 1939 if ( edge3->link ) 1940 edge3->link->pos -= delta; 1941 1942 /* move the serifs along with the stem */ 1943 if ( n_edges == 12 ) 1944 { 1945 ( edges + 8 )->pos -= delta; 1946 ( edges + 11 )->pos -= delta; 1947 } 1948 1949 edge3->flags |= AF_EDGE_DONE; 1950 if ( edge3->link ) 1951 edge3->link->flags |= AF_EDGE_DONE; 1952 } 1953 } 1954 1955 if ( !skipped ) 1956 return; 1957 1958 /* 1959 * now hint the remaining edges (serifs and single) in order 1960 * to complete our processing 1961 */ 1962 for ( edge = edges; edge < edge_limit; edge++ ) 1963 { 1964 if ( edge->flags & AF_EDGE_DONE ) 1965 continue; 1966 1967 if ( edge->serif ) 1968 { 1969 af_cjk_align_serif_edge( hints, edge->serif, edge ); 1970 edge->flags |= AF_EDGE_DONE; 1971 skipped--; 1972 } 1973 } 1974 1975 if ( !skipped ) 1976 return; 1977 1978 for ( edge = edges; edge < edge_limit; edge++ ) 1979 { 1980 AF_Edge before, after; 1981 1982 1983 if ( edge->flags & AF_EDGE_DONE ) 1984 continue; 1985 1986 before = after = edge; 1987 1988 while ( --before >= edges ) 1989 if ( before->flags & AF_EDGE_DONE ) 1990 break; 1991 1992 while ( ++after < edge_limit ) 1993 if ( after->flags & AF_EDGE_DONE ) 1994 break; 1995 1996 if ( before >= edges || after < edge_limit ) 1997 { 1998 if ( before < edges ) 1999 af_cjk_align_serif_edge( hints, after, edge ); 2000 else if ( after >= edge_limit ) 2001 af_cjk_align_serif_edge( hints, before, edge ); 2002 else 2003 { 2004 if ( after->fpos == before->fpos ) 2005 edge->pos = before->pos; 2006 else 2007 edge->pos = before->pos + 2008 FT_MulDiv( edge->fpos - before->fpos, 2009 after->pos - before->pos, 2010 after->fpos - before->fpos ); 2011 } 2012 } 2013 } 2014 } 2015 2016 2017 static void af_cjk_align_edge_points(AF_GlyphHints hints,AF_Dimension dim)2018 af_cjk_align_edge_points( AF_GlyphHints hints, 2019 AF_Dimension dim ) 2020 { 2021 AF_AxisHints axis = & hints->axis[dim]; 2022 AF_Edge edges = axis->edges; 2023 AF_Edge edge_limit = edges + axis->num_edges; 2024 AF_Edge edge; 2025 FT_Bool snapping; 2026 2027 2028 snapping = FT_BOOL( ( dim == AF_DIMENSION_HORZ && 2029 AF_LATIN_HINTS_DO_HORZ_SNAP( hints ) ) || 2030 ( dim == AF_DIMENSION_VERT && 2031 AF_LATIN_HINTS_DO_VERT_SNAP( hints ) ) ); 2032 2033 for ( edge = edges; edge < edge_limit; edge++ ) 2034 { 2035 /* move the points of each segment */ 2036 /* in each edge to the edge's position */ 2037 AF_Segment seg = edge->first; 2038 2039 2040 if ( snapping ) 2041 { 2042 do 2043 { 2044 AF_Point point = seg->first; 2045 2046 2047 for (;;) 2048 { 2049 if ( dim == AF_DIMENSION_HORZ ) 2050 { 2051 point->x = edge->pos; 2052 point->flags |= AF_FLAG_TOUCH_X; 2053 } 2054 else 2055 { 2056 point->y = edge->pos; 2057 point->flags |= AF_FLAG_TOUCH_Y; 2058 } 2059 2060 if ( point == seg->last ) 2061 break; 2062 2063 point = point->next; 2064 } 2065 2066 seg = seg->edge_next; 2067 2068 } while ( seg != edge->first ); 2069 } 2070 else 2071 { 2072 FT_Pos delta = edge->pos - edge->opos; 2073 2074 2075 do 2076 { 2077 AF_Point point = seg->first; 2078 2079 2080 for (;;) 2081 { 2082 if ( dim == AF_DIMENSION_HORZ ) 2083 { 2084 point->x += delta; 2085 point->flags |= AF_FLAG_TOUCH_X; 2086 } 2087 else 2088 { 2089 point->y += delta; 2090 point->flags |= AF_FLAG_TOUCH_Y; 2091 } 2092 2093 if ( point == seg->last ) 2094 break; 2095 2096 point = point->next; 2097 } 2098 2099 seg = seg->edge_next; 2100 2101 } while ( seg != edge->first ); 2102 } 2103 } 2104 } 2105 2106 2107 FT_LOCAL_DEF( FT_Error ) af_cjk_hints_apply(AF_GlyphHints hints,FT_Outline * outline,AF_CJKMetrics metrics)2108 af_cjk_hints_apply( AF_GlyphHints hints, 2109 FT_Outline* outline, 2110 AF_CJKMetrics metrics ) 2111 { 2112 FT_Error error; 2113 int dim; 2114 2115 FT_UNUSED( metrics ); 2116 2117 2118 error = af_glyph_hints_reload( hints, outline ); 2119 if ( error ) 2120 goto Exit; 2121 2122 /* analyze glyph outline */ 2123 if ( AF_HINTS_DO_HORIZONTAL( hints ) ) 2124 { 2125 error = af_cjk_hints_detect_features( hints, AF_DIMENSION_HORZ ); 2126 if ( error ) 2127 goto Exit; 2128 2129 af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_HORZ ); 2130 } 2131 2132 if ( AF_HINTS_DO_VERTICAL( hints ) ) 2133 { 2134 error = af_cjk_hints_detect_features( hints, AF_DIMENSION_VERT ); 2135 if ( error ) 2136 goto Exit; 2137 2138 af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_VERT ); 2139 } 2140 2141 /* grid-fit the outline */ 2142 for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) 2143 { 2144 if ( ( dim == AF_DIMENSION_HORZ && AF_HINTS_DO_HORIZONTAL( hints ) ) || 2145 ( dim == AF_DIMENSION_VERT && AF_HINTS_DO_VERTICAL( hints ) ) ) 2146 { 2147 2148 #ifdef AF_CONFIG_OPTION_USE_WARPER 2149 if ( dim == AF_DIMENSION_HORZ && 2150 metrics->root.scaler.render_mode == FT_RENDER_MODE_NORMAL ) 2151 { 2152 AF_WarperRec warper; 2153 FT_Fixed scale; 2154 FT_Pos delta; 2155 2156 2157 af_warper_compute( &warper, hints, (AF_Dimension)dim, 2158 &scale, &delta ); 2159 af_glyph_hints_scale_dim( hints, (AF_Dimension)dim, 2160 scale, delta ); 2161 continue; 2162 } 2163 #endif /* AF_CONFIG_OPTION_USE_WARPER */ 2164 2165 af_cjk_hint_edges( hints, (AF_Dimension)dim ); 2166 af_cjk_align_edge_points( hints, (AF_Dimension)dim ); 2167 af_glyph_hints_align_strong_points( hints, (AF_Dimension)dim ); 2168 af_glyph_hints_align_weak_points( hints, (AF_Dimension)dim ); 2169 } 2170 } 2171 2172 #if 0 2173 af_glyph_hints_dump_points( hints ); 2174 af_glyph_hints_dump_segments( hints ); 2175 af_glyph_hints_dump_edges( hints ); 2176 #endif 2177 2178 af_glyph_hints_save( hints, outline ); 2179 2180 Exit: 2181 return error; 2182 } 2183 2184 2185 /*************************************************************************/ 2186 /*************************************************************************/ 2187 /***** *****/ 2188 /***** C J K S C R I P T C L A S S *****/ 2189 /***** *****/ 2190 /*************************************************************************/ 2191 /*************************************************************************/ 2192 2193 2194 /* this corresponds to Unicode 6.0 */ 2195 2196 static const AF_Script_UniRangeRec af_cjk_uniranges[] = 2197 { 2198 AF_UNIRANGE_REC( 0x1100UL, 0x11FFUL ), /* Hangul Jamo */ 2199 AF_UNIRANGE_REC( 0x2E80UL, 0x2EFFUL ), /* CJK Radicals Supplement */ 2200 AF_UNIRANGE_REC( 0x2F00UL, 0x2FDFUL ), /* Kangxi Radicals */ 2201 AF_UNIRANGE_REC( 0x2FF0UL, 0x2FFFUL ), /* Ideographic Description Characters */ 2202 AF_UNIRANGE_REC( 0x3000UL, 0x303FUL ), /* CJK Symbols and Punctuation */ 2203 AF_UNIRANGE_REC( 0x3040UL, 0x309FUL ), /* Hiragana */ 2204 AF_UNIRANGE_REC( 0x30A0UL, 0x30FFUL ), /* Katakana */ 2205 AF_UNIRANGE_REC( 0x3100UL, 0x312FUL ), /* Bopomofo */ 2206 AF_UNIRANGE_REC( 0x3130UL, 0x318FUL ), /* Hangul Compatibility Jamo */ 2207 AF_UNIRANGE_REC( 0x3190UL, 0x319FUL ), /* Kanbun */ 2208 AF_UNIRANGE_REC( 0x31A0UL, 0x31BFUL ), /* Bopomofo Extended */ 2209 AF_UNIRANGE_REC( 0x31C0UL, 0x31EFUL ), /* CJK Strokes */ 2210 AF_UNIRANGE_REC( 0x31F0UL, 0x31FFUL ), /* Katakana Phonetic Extensions */ 2211 AF_UNIRANGE_REC( 0x3200UL, 0x32FFUL ), /* Enclosed CJK Letters and Months */ 2212 AF_UNIRANGE_REC( 0x3300UL, 0x33FFUL ), /* CJK Compatibility */ 2213 AF_UNIRANGE_REC( 0x3400UL, 0x4DBFUL ), /* CJK Unified Ideographs Extension A */ 2214 AF_UNIRANGE_REC( 0x4DC0UL, 0x4DFFUL ), /* Yijing Hexagram Symbols */ 2215 AF_UNIRANGE_REC( 0x4E00UL, 0x9FFFUL ), /* CJK Unified Ideographs */ 2216 AF_UNIRANGE_REC( 0xA960UL, 0xA97FUL ), /* Hangul Jamo Extended-A */ 2217 AF_UNIRANGE_REC( 0xAC00UL, 0xD7AFUL ), /* Hangul Syllables */ 2218 AF_UNIRANGE_REC( 0xD7B0UL, 0xD7FFUL ), /* Hangul Jamo Extended-B */ 2219 AF_UNIRANGE_REC( 0xF900UL, 0xFAFFUL ), /* CJK Compatibility Ideographs */ 2220 AF_UNIRANGE_REC( 0xFE10UL, 0xFE1FUL ), /* Vertical forms */ 2221 AF_UNIRANGE_REC( 0xFE30UL, 0xFE4FUL ), /* CJK Compatibility Forms */ 2222 AF_UNIRANGE_REC( 0xFF00UL, 0xFFEFUL ), /* Halfwidth and Fullwidth Forms */ 2223 AF_UNIRANGE_REC( 0x1B000UL, 0x1B0FFUL ), /* Kana Supplement */ 2224 AF_UNIRANGE_REC( 0x1D300UL, 0x1D35FUL ), /* Tai Xuan Hing Symbols */ 2225 AF_UNIRANGE_REC( 0x1F200UL, 0x1F2FFUL ), /* Enclosed Ideographic Supplement */ 2226 AF_UNIRANGE_REC( 0x20000UL, 0x2A6DFUL ), /* CJK Unified Ideographs Extension B */ 2227 AF_UNIRANGE_REC( 0x2A700UL, 0x2B73FUL ), /* CJK Unified Ideographs Extension C */ 2228 AF_UNIRANGE_REC( 0x2B740UL, 0x2B81FUL ), /* CJK Unified Ideographs Extension D */ 2229 AF_UNIRANGE_REC( 0x2F800UL, 0x2FA1FUL ), /* CJK Compatibility Ideographs Supplement */ 2230 AF_UNIRANGE_REC( 0UL, 0UL ) 2231 }; 2232 2233 2234 AF_DEFINE_SCRIPT_CLASS( af_cjk_script_class, 2235 AF_SCRIPT_CJK, 2236 af_cjk_uniranges, 2237 0x7530, /* 田 */ 2238 2239 sizeof ( AF_CJKMetricsRec ), 2240 2241 (AF_Script_InitMetricsFunc) af_cjk_metrics_init, 2242 (AF_Script_ScaleMetricsFunc)af_cjk_metrics_scale, 2243 (AF_Script_DoneMetricsFunc) NULL, 2244 2245 (AF_Script_InitHintsFunc) af_cjk_hints_init, 2246 (AF_Script_ApplyHintsFunc) af_cjk_hints_apply 2247 ) 2248 2249 #else /* !AF_CONFIG_OPTION_CJK */ 2250 2251 static const AF_Script_UniRangeRec af_cjk_uniranges[] = 2252 { 2253 AF_UNIRANGE_REC( 0UL, 0UL ) 2254 }; 2255 2256 2257 AF_DEFINE_SCRIPT_CLASS( af_cjk_script_class, 2258 AF_SCRIPT_CJK, 2259 af_cjk_uniranges, 2260 0, 2261 2262 sizeof ( AF_CJKMetricsRec ), 2263 2264 (AF_Script_InitMetricsFunc) NULL, 2265 (AF_Script_ScaleMetricsFunc)NULL, 2266 (AF_Script_DoneMetricsFunc) NULL, 2267 2268 (AF_Script_InitHintsFunc) NULL, 2269 (AF_Script_ApplyHintsFunc) NULL 2270 ) 2271 2272 #endif /* !AF_CONFIG_OPTION_CJK */ 2273 2274 2275 /* END */ 2276