1 /***************************************************************************/ 2 /* */ 3 /* afcjk.c */ 4 /* */ 5 /* Auto-fitter hinting routines for CJK script (body). */ 6 /* */ 7 /* Copyright 2006-2011 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 ) 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 { 83 FT_Error error; 84 FT_UInt glyph_index; 85 int dim; 86 AF_CJKMetricsRec dummy[1]; 87 AF_Scaler scaler = &dummy->root.scaler; 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; 123 124 125 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 af_sort_widths( num_widths, axis->widths ); 154 axis->width_count = num_widths; 155 } 156 157 Exit: 158 for ( dim = 0; dim < AF_DIMENSION_MAX; dim++ ) 159 { 160 AF_CJKAxis axis = &metrics->axis[dim]; 161 FT_Pos stdw; 162 163 164 stdw = ( axis->width_count > 0 ) ? axis->widths[0].org 165 : AF_LATIN_CONSTANT( metrics, 50 ); 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 } 176 177 178 #define AF_CJK_MAX_TEST_CHARACTERS 32 179 180 181 /* Each blue zone has two types of fill and unfill, this is, */ 182 /* filling the entire glyph square or not. */ 183 184 enum 185 { 186 AF_CJK_BLUE_TYPE_FILL, 187 AF_CJK_BLUE_TYPE_UNFILL, 188 AF_CJK_BLUE_TYPE_MAX 189 }; 190 191 192 /* 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 }; 259 260 261 /* Calculate blue zones for all the CJK_BLUE_XXX's. */ 262 263 static void 264 af_cjk_metrics_init_blues( AF_CJKMetrics metrics, 265 FT_Face face, 266 const FT_ULong blue_chars 267 [AF_CJK_BLUE_MAX] 268 [AF_CJK_BLUE_TYPE_MAX] 269 [AF_CJK_MAX_TEST_CHARACTERS] ) 270 { 271 FT_Pos fills[AF_CJK_MAX_TEST_CHARACTERS]; 272 FT_Pos flats[AF_CJK_MAX_TEST_CHARACTERS]; 273 274 FT_Int num_fills; 275 FT_Int num_flats; 276 277 FT_Int bb; 278 AF_CJKBlue blue; 279 FT_Error error; 280 AF_CJKAxis axis; 281 FT_GlyphSlot glyph = face->glyph; 282 283 #ifdef FT_DEBUG_LEVEL_TRACE 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 }; 294 #endif 295 296 297 /* 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.). */ 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; 309 310 311 num_fills = 0; 312 num_flats = 0; 313 314 for ( fill_type = 0; fill_type < AF_CJK_BLUE_TYPE_MAX; fill_type++ ) 315 { 316 const FT_ULong* p = blue_chars[bb][fill_type]; 317 const FT_ULong* limit = p + AF_CJK_MAX_TEST_CHARACTERS; 318 FT_Bool fill = FT_BOOL( 319 fill_type == AF_CJK_BLUE_TYPE_FILL ); 320 321 322 FT_TRACE5(( "cjk blue %s/%s\n", cjk_blue_name[bb], 323 cjk_blue_type_name[fill_type] )); 324 325 326 for ( ; p < limit && *p; p++ ) 327 { 328 FT_UInt glyph_index; 329 FT_Pos best_pos; /* same as points.y */ 330 FT_Int best_point; 331 FT_Vector* points; 332 333 334 FT_TRACE5(( " U+%lX...", *p )); 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 ) 339 { 340 FT_TRACE5(( "unavailable\n" )); 341 continue; 342 } 343 344 error = FT_Load_Glyph( face, glyph_index, FT_LOAD_NO_SCALE ); 345 if ( error || glyph->outline.n_points <= 0 ) 346 { 347 FT_TRACE5(( "no outline\n" )); 348 continue; 349 } 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 */ 355 356 { 357 FT_Int nn; 358 FT_Int first = 0; 359 FT_Int last = -1; 360 361 362 for ( nn = 0; 363 nn < glyph->outline.n_contours; 364 first = last + 1, nn++ ) 365 { 366 FT_Int pp; 367 368 369 last = glyph->outline.contours[nn]; 370 371 /* 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. */ 375 if ( last <= first ) 376 continue; 377 378 switch ( bb ) 379 { 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 } 419 } 420 FT_TRACE5(( "best_pos=%5ld\n", best_pos )); 421 } 422 423 if ( fill ) 424 fills[num_fills++] = best_pos; 425 else 426 flats[num_flats++] = best_pos; 427 } 428 } 429 430 if ( num_flats == 0 && num_fills == 0 ) 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, */ 441 /* now determine the reference position of the blue -- */ 442 /* we simply take the median value after a simple sort */ 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 } 471 472 /* make sure blue_ref >= blue_shoot for top/right or */ 473 /* vice versa for bottom/left */ 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; 490 491 FT_TRACE5(( "-- cjk %s bluezone ref = %ld shoot = %ld\n", 492 cjk_blue_name[bb], *blue_ref, *blue_shoot )); 493 } 494 495 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 } 544 545 546 FT_LOCAL_DEF( FT_Error ) 547 af_cjk_metrics_init( AF_CJKMetrics metrics, 548 FT_Face face ) 549 { 550 FT_CharMap oldmap = face->charmap; 551 552 553 metrics->units_per_em = face->units_per_EM; 554 555 if ( FT_Select_Charmap( face, FT_ENCODING_UNICODE ) ) 556 face->charmap = NULL; 557 else 558 { 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 ); 562 } 563 564 FT_Set_Charmap( face, oldmap ); 565 566 return AF_Err_Ok; 567 } 568 569 570 static void 571 af_cjk_metrics_scale_dim( AF_CJKMetrics metrics, 572 AF_Scaler scaler, 573 AF_Dimension dim ) 574 { 575 FT_Fixed scale; 576 FT_Pos delta; 577 AF_CJKAxis axis; 578 FT_UInt nn; 579 580 581 axis = &metrics->axis[dim]; 582 583 if ( dim == AF_DIMENSION_HORZ ) 584 { 585 scale = scaler->x_scale; 586 delta = scaler->x_delta; 587 } 588 else 589 { 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 { 606 AF_CJKBlue blue = &axis->blues[nn]; 607 FT_Pos dist; 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; 621 622 623 blue->ref.fit = FT_PIX_ROUND( blue->ref.cur ); 624 625 /* shoot is under shoot for cjk */ 626 delta1 = FT_DivFix( blue->ref.fit, scale ) - blue->shoot.org; 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; 636 #if 0 637 else if ( delta2 < 64 ) 638 delta2 = 32 + ( ( ( delta2 - 32 ) + 16 ) & ~31 ); 639 #endif 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", 651 ( dim == AF_DIMENSION_HORZ ) ? 'H' : 'V', 652 nn, blue->ref.org, blue->shoot.org, 653 blue->ref.cur / 64.0, blue->ref.fit / 64.0, 654 blue->shoot.cur / 64.0, blue->shoot.fit / 64.0 )); 655 656 blue->flags |= AF_CJK_BLUE_ACTIVE; 657 } 658 } 659 } 660 661 662 FT_LOCAL_DEF( void ) 663 af_cjk_metrics_scale( AF_CJKMetrics metrics, 664 AF_Scaler scaler ) 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 /***** *****/ 676 /***** C J K G L Y P H A N A L Y S I S *****/ 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; 702 AF_Flags f0 = (AF_Flags)(pt->flags & AF_FLAG_CONTROL); 703 AF_Flags f1; 704 705 706 seg->flags &= ~AF_EDGE_ROUND; 707 708 for ( ; pt != last; f0 = f1 ) 709 { 710 pt = pt->next; 711 f1 = (AF_Flags)(pt->flags & AF_FLAG_CONTROL); 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; 734 FT_Pos len_threshold; 735 FT_Pos dist_threshold; 736 737 738 len_threshold = AF_LATIN_CONSTANT( hints->metrics, 8 ); 739 740 dist_threshold = ( dim == AF_DIMENSION_HORZ ) ? hints->x_scale 741 : hints->y_scale; 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 { 778 if ( dist * 8 < seg1->score * 9 && 779 ( dist * 8 < seg1->score * 7 || seg1->len < len ) ) 780 { 781 seg1->score = dist; 782 seg1->len = len; 783 seg1->link = seg2; 784 } 785 786 if ( dist * 8 < seg2->score * 9 && 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 /* 799 * now compute the `serif' segments 800 * 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 * 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; 897 AF_CJKAxis laxis = &((AF_CJKMetrics)hints->metrics)->axis[dim]; 898 899 AF_Segment segments = axis->segments; 900 AF_Segment segment_limit = segments + axis->num_segments; 901 AF_Segment seg; 902 903 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; 911 912 /*********************************************************************/ 913 /* */ 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. */ 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 */ 920 /* list which is then processed in the second step to compute the */ 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 ) 931 edge_distance_threshold = FT_DivFix( 64 / 4, scale ); 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; 959 960 961 /* check whether all linked segments of the candidate edge */ 962 /* can make a single edge. */ 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 } 985 986 best = dist; 987 found = edge; 988 } 989 } 990 991 if ( !found ) 992 { 993 AF_Edge edge; 994 995 996 /* insert a new edge in the list and */ 997 /* sort according to the position */ 998 error = af_axis_hints_new_edge( axis, seg->pos, 999 (AF_Direction)seg->dir, 1000 memory, &edge ); 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 1024 /*********************************************************************/ 1025 /* */ 1026 /* Good, we now compute each edge's properties according to segments */ 1027 /* found on its position. Basically, these are as follows. */ 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 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. */ 1042 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 1061 /* now compute each edge properties */ 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 1137 /* get rid of serifs if link is set */ 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 1169 FT_LOCAL_DEF( void ) 1170 af_cjk_hints_compute_blue_edges( AF_GlyphHints hints, 1171 AF_CJKMetrics metrics, 1172 AF_Dimension dim ) 1173 { 1174 AF_AxisHints axis = &hints->axis[dim]; 1175 AF_Edge edge = axis->edges; 1176 AF_Edge edge_limit = edge + axis->num_edges; 1177 AF_CJKAxis cjk = &metrics->axis[dim]; 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 1185 if ( best_dist0 > 64 / 2 ) /* maximum 1/2 pixel */ 1186 best_dist0 = 64 / 2; 1187 1188 /* compute which blue zones are active, i.e. have their scaled */ 1189 /* size < 3/4 pixels */ 1190 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 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 { 1204 AF_CJKBlue blue = cjk->blues + bb; 1205 FT_Bool is_top_right_blue, is_major_dir; 1206 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 */ 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 ) ); 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; 1238 if ( dist < 0 ) 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 1256 FT_LOCAL_DEF( FT_Error ) 1257 af_cjk_hints_init( AF_GlyphHints hints, 1258 AF_CJKMetrics metrics ) 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 1278 #ifdef AF_CONFIG_OPTION_USE_WARPER 1279 if ( mode == FT_RENDER_MODE_LCD || mode == FT_RENDER_MODE_LCD_V ) 1280 metrics->root.scaler.render_mode = mode = FT_RENDER_MODE_NORMAL; 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 /***** *****/ 1321 /***** C J K G L Y P H G R I D - F I T T I N G *****/ 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 { 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 ); 1388 1389 FT_UNUSED( base_flags ); 1390 FT_UNUSED( stem_flags ); 1391 1392 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 } 1418 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 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 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 { 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; 1554 1555 1556 if ( !AF_LATIN_HINTS_DO_STEM_ADJUST( hints ) ) 1557 { 1558 if ( ( edge->flags & AF_EDGE_ROUND ) && 1559 ( edge2->flags & AF_EDGE_ROUND ) ) 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 ) 1569 threshold = 64 - AF_LIGHT_MODE_MAX_HORZ_GAP / 3; 1570 else 1571 threshold = 64 - AF_LIGHT_MODE_MAX_VERT_GAP / 3; 1572 } 1573 } 1574 1575 org_len = edge2->opos - edge->opos; 1576 cur_len = af_cjk_compute_stem_width( hints, dim, org_len, 1577 (AF_Edge_Flags)edge->flags, 1578 (AF_Edge_Flags)edge2->flags ); 1579 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: 1640 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 1667 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; 1675 FT_PtrDist n_edges; 1676 AF_Edge edge; 1677 AF_Edge anchor = 0; 1678 FT_Pos delta = 0; 1679 FT_Int skipped = 0; 1680 FT_Bool has_last_stem = FALSE; 1681 FT_Pos last_stem_pos = 0; 1682 1683 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 1736 /* now we align all stem edges. */ 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 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 1769 /* now align the stem */ 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 } 1779 1780 if ( edge2 < edge ) 1781 { 1782 af_cjk_align_linked_edge( hints, dim, edge2, edge ); 1783 edge->flags |= AF_EDGE_DONE; 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; 1790 continue; 1791 } 1792 1793 if ( dim != AF_DIMENSION_VERT && !anchor ) 1794 { 1795 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 1814 delta = ( ( ( hinter->pp2.x + 32 ) & -64 ) - hinter->pp2.x ) / 2; 1815 target = left->opos + ( right->opos - left->opos ) / 2 + delta - 16; 1816 1817 delta1 = delta; 1818 delta1 += af_hint_normal_stem( hints, left, left->link, 1819 delta1, 0 ); 1820 1821 if ( left->link != right ) 1822 af_hint_normal_stem( hints, right->link, right, delta1, 0 ); 1823 1824 center1 = left->pos + ( right->pos - left->pos ) / 2; 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 1838 center2 = left1.pos + ( right2.pos - left1.pos ) / 2; 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 1863 1864 #endif /* 0 */ 1865 1866 delta = af_hint_normal_stem( hints, edge, edge2, 0, 1867 AF_DIMENSION_HORZ ); 1868 } 1869 else 1870 af_hint_normal_stem( hints, edge, edge2, delta, dim ); 1871 1872 #if 0 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 ); 1877 #endif 1878 1879 anchor = edge; 1880 edge->flags |= AF_EDGE_DONE; 1881 edge2->flags |= AF_EDGE_DONE; 1882 has_last_stem = TRUE; 1883 last_stem_pos = edge2->pos; 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 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 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 } 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 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 ) ) ); 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 2102 FT_LOCAL_DEF( FT_Error ) 2103 af_cjk_hints_apply( AF_GlyphHints hints, 2104 FT_Outline* outline, 2105 AF_CJKMetrics metrics ) 2106 { 2107 FT_Error error; 2108 int dim; 2109 2110 FT_UNUSED( metrics ); 2111 2112 2113 error = af_glyph_hints_reload( hints, outline ); 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; 2123 2124 af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_HORZ ); 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; 2132 2133 af_cjk_hints_compute_blue_edges( hints, metrics, AF_DIMENSION_VERT ); 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 { 2142 2143 #ifdef AF_CONFIG_OPTION_USE_WARPER 2144 if ( dim == AF_DIMENSION_HORZ && 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 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 ); 2156 continue; 2157 } 2158 #endif /* AF_CONFIG_OPTION_USE_WARPER */ 2159 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 /***** *****/ 2183 /***** C J K S C R I P T C L A S S *****/ 2184 /***** *****/ 2185 /*************************************************************************/ 2186 /*************************************************************************/ 2187 2188 2189 /* this corresponds to Unicode 6.0 */ 2190 2191 static const AF_Script_UniRangeRec af_cjk_uniranges[] = 2192 { 2193 AF_UNIRANGE_REC( 0x2E80UL, 0x2EFFUL ), /* CJK Radicals Supplement */ 2194 AF_UNIRANGE_REC( 0x2F00UL, 0x2FDFUL ), /* Kangxi Radicals */ 2195 AF_UNIRANGE_REC( 0x2FF0UL, 0x2FFFUL ), /* Ideographic Description Characters */ 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 */ 2201 AF_UNIRANGE_REC( 0x3190UL, 0x319FUL ), /* Kanbun */ 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 */ 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 */ 2213 AF_UNIRANGE_REC( 0xF900UL, 0xFAFFUL ), /* CJK Compatibility Ideographs */ 2214 AF_UNIRANGE_REC( 0xFE10UL, 0xFE1FUL ), /* Vertical forms */ 2215 AF_UNIRANGE_REC( 0xFE30UL, 0xFE4FUL ), /* CJK Compatibility Forms */ 2216 AF_UNIRANGE_REC( 0xFF00UL, 0xFFEFUL ), /* Halfwidth and Fullwidth Forms */ 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 */ 2220 AF_UNIRANGE_REC( 0x20000UL, 0x2A6DFUL ), /* CJK Unified Ideographs Extension B */ 2221 AF_UNIRANGE_REC( 0x2A700UL, 0x2B73FUL ), /* CJK Unified Ideographs Extension C */ 2222 AF_UNIRANGE_REC( 0x2B740UL, 0x2B81FUL ), /* CJK Unified Ideographs Extension D */ 2223 AF_UNIRANGE_REC( 0x2F800UL, 0x2FA1FUL ), /* CJK Compatibility Ideographs Supplement */ 2224 AF_UNIRANGE_REC( 0UL, 0UL ) 2225 }; 2226 2227 2228 AF_DEFINE_SCRIPT_CLASS(af_cjk_script_class, 2229 AF_SCRIPT_CJK, 2230 af_cjk_uniranges, 2231 2232 sizeof( AF_CJKMetricsRec ), 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 2240 ) 2241 2242 #else /* !AF_CONFIG_OPTION_CJK */ 2243 2244 static const AF_Script_UniRangeRec af_cjk_uniranges[] = 2245 { 2246 AF_UNIRANGE_REC( 0UL, 0UL ) 2247 }; 2248 2249 2250 AF_DEFINE_SCRIPT_CLASS(af_cjk_script_class, 2251 AF_SCRIPT_CJK, 2252 af_cjk_uniranges, 2253 2254 sizeof( AF_CJKMetricsRec ), 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 2262 ) 2263 2264 #endif /* !AF_CONFIG_OPTION_CJK */ 2265 2266 2267 /* END */ 2268
