ftcbasic.c revision 38b272ffbbdaae276d636aec4ef84af407d16181
1/***************************************************************************/ 2/* */ 3/* ftcbasic.c */ 4/* */ 5/* The FreeType basic cache interface (body). */ 6/* */ 7/* Copyright 2003, 2004, 2005, 2006, 2007, 2009, 2010 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#include <ft2build.h> 20#include FT_INTERNAL_OBJECTS_H 21#include FT_INTERNAL_DEBUG_H 22#include FT_CACHE_H 23#include "ftcglyph.h" 24#include "ftcimage.h" 25#include "ftcsbits.h" 26 27#include "ftccback.h" 28#include "ftcerror.h" 29 30#define FT_COMPONENT trace_cache 31 32 33#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 34 35 /* 36 * These structures correspond to the FTC_Font and FTC_ImageDesc types 37 * that were defined in version 2.1.7. 38 */ 39 typedef struct FTC_OldFontRec_ 40 { 41 FTC_FaceID face_id; 42 FT_UShort pix_width; 43 FT_UShort pix_height; 44 45 } FTC_OldFontRec, *FTC_OldFont; 46 47 48 typedef struct FTC_OldImageDescRec_ 49 { 50 FTC_OldFontRec font; 51 FT_UInt32 flags; 52 53 } FTC_OldImageDescRec, *FTC_OldImageDesc; 54 55 56 /* 57 * Notice that FTC_OldImageDescRec and FTC_ImageTypeRec are nearly 58 * identical, bit-wise. The only difference is that the `width' and 59 * `height' fields are expressed as 16-bit integers in the old structure, 60 * and as normal `int' in the new one. 61 * 62 * We are going to perform a weird hack to detect which structure is 63 * being passed to the image and sbit caches. If the new structure's 64 * `width' is larger than 0x10000, we assume that we are really receiving 65 * an FTC_OldImageDesc. 66 */ 67 68#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 69 70 71 /* 72 * Basic Families 73 * 74 */ 75 typedef struct FTC_BasicAttrRec_ 76 { 77 FTC_ScalerRec scaler; 78 FT_UInt load_flags; 79 80 } FTC_BasicAttrRec, *FTC_BasicAttrs; 81 82#define FTC_BASIC_ATTR_COMPARE( a, b ) \ 83 FT_BOOL( FTC_SCALER_COMPARE( &(a)->scaler, &(b)->scaler ) && \ 84 (a)->load_flags == (b)->load_flags ) 85 86#define FTC_BASIC_ATTR_HASH( a ) \ 87 ( FTC_SCALER_HASH( &(a)->scaler ) + 31*(a)->load_flags ) 88 89 90 typedef struct FTC_BasicQueryRec_ 91 { 92 FTC_GQueryRec gquery; 93 FTC_BasicAttrRec attrs; 94 95 } FTC_BasicQueryRec, *FTC_BasicQuery; 96 97 98 typedef struct FTC_BasicFamilyRec_ 99 { 100 FTC_FamilyRec family; 101 FTC_BasicAttrRec attrs; 102 103 } FTC_BasicFamilyRec, *FTC_BasicFamily; 104 105 106 FT_CALLBACK_DEF( FT_Bool ) 107 ftc_basic_family_compare( FTC_MruNode ftcfamily, 108 FT_Pointer ftcquery ) 109 { 110 FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; 111 FTC_BasicQuery query = (FTC_BasicQuery)ftcquery; 112 113 114 return FTC_BASIC_ATTR_COMPARE( &family->attrs, &query->attrs ); 115 } 116 117 118 FT_CALLBACK_DEF( FT_Error ) 119 ftc_basic_family_init( FTC_MruNode ftcfamily, 120 FT_Pointer ftcquery, 121 FT_Pointer ftccache ) 122 { 123 FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; 124 FTC_BasicQuery query = (FTC_BasicQuery)ftcquery; 125 FTC_Cache cache = (FTC_Cache)ftccache; 126 127 128 FTC_Family_Init( FTC_FAMILY( family ), cache ); 129 family->attrs = query->attrs; 130 return 0; 131 } 132 133 134 FT_CALLBACK_DEF( FT_UInt ) 135 ftc_basic_family_get_count( FTC_Family ftcfamily, 136 FTC_Manager manager ) 137 { 138 FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; 139 FT_Error error; 140 FT_Face face; 141 FT_UInt result = 0; 142 143 144 error = FTC_Manager_LookupFace( manager, family->attrs.scaler.face_id, 145 &face ); 146 147 if ( error || !face ) 148 return result; 149 150 if ( (FT_ULong)face->num_glyphs > FT_UINT_MAX || 0 > face->num_glyphs ) 151 { 152 FT_TRACE1(( "ftc_basic_family_get_count: too large number of glyphs " )); 153 FT_TRACE1(( "in this face, truncated\n", face->num_glyphs )); 154 } 155 156 if ( !error ) 157 result = (FT_UInt)face->num_glyphs; 158 159 return result; 160 } 161 162 163 FT_CALLBACK_DEF( FT_Error ) 164 ftc_basic_family_load_bitmap( FTC_Family ftcfamily, 165 FT_UInt gindex, 166 FTC_Manager manager, 167 FT_Face *aface ) 168 { 169 FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; 170 FT_Error error; 171 FT_Size size; 172 173 174 error = FTC_Manager_LookupSize( manager, &family->attrs.scaler, &size ); 175 if ( !error ) 176 { 177 FT_Face face = size->face; 178 179 180 error = FT_Load_Glyph( face, gindex, 181 family->attrs.load_flags | FT_LOAD_RENDER ); 182 if ( !error ) 183 *aface = face; 184 } 185 186 return error; 187 } 188 189 190 FT_CALLBACK_DEF( FT_Error ) 191 ftc_basic_family_load_glyph( FTC_Family ftcfamily, 192 FT_UInt gindex, 193 FTC_Cache cache, 194 FT_Glyph *aglyph ) 195 { 196 FTC_BasicFamily family = (FTC_BasicFamily)ftcfamily; 197 FT_Error error; 198 FTC_Scaler scaler = &family->attrs.scaler; 199 FT_Face face; 200 FT_Size size; 201 202 203 /* we will now load the glyph image */ 204 error = FTC_Manager_LookupSize( cache->manager, 205 scaler, 206 &size ); 207 if ( !error ) 208 { 209 face = size->face; 210 211 error = FT_Load_Glyph( face, gindex, family->attrs.load_flags ); 212 if ( !error ) 213 { 214 if ( face->glyph->format == FT_GLYPH_FORMAT_BITMAP || 215 face->glyph->format == FT_GLYPH_FORMAT_OUTLINE ) 216 { 217 /* ok, copy it */ 218 FT_Glyph glyph; 219 220 221 error = FT_Get_Glyph( face->glyph, &glyph ); 222 if ( !error ) 223 { 224 *aglyph = glyph; 225 goto Exit; 226 } 227 } 228 else 229 error = FTC_Err_Invalid_Argument; 230 } 231 } 232 233 Exit: 234 return error; 235 } 236 237 238 FT_CALLBACK_DEF( FT_Bool ) 239 ftc_basic_gnode_compare_faceid( FTC_Node ftcgnode, 240 FT_Pointer ftcface_id, 241 FTC_Cache cache, 242 FT_Bool* list_changed ) 243 { 244 FTC_GNode gnode = (FTC_GNode)ftcgnode; 245 FTC_FaceID face_id = (FTC_FaceID)ftcface_id; 246 FTC_BasicFamily family = (FTC_BasicFamily)gnode->family; 247 FT_Bool result; 248 249 250 if ( list_changed ) 251 *list_changed = FALSE; 252 result = FT_BOOL( family->attrs.scaler.face_id == face_id ); 253 if ( result ) 254 { 255 /* we must call this function to avoid this node from appearing 256 * in later lookups with the same face_id! 257 */ 258 FTC_GNode_UnselectFamily( gnode, cache ); 259 } 260 return result; 261 } 262 263 264 /* 265 * 266 * basic image cache 267 * 268 */ 269 270 FT_CALLBACK_TABLE_DEF 271 const FTC_IFamilyClassRec ftc_basic_image_family_class = 272 { 273 { 274 sizeof ( FTC_BasicFamilyRec ), 275 ftc_basic_family_compare, 276 ftc_basic_family_init, 277 0, /* FTC_MruNode_ResetFunc */ 278 0 /* FTC_MruNode_DoneFunc */ 279 }, 280 ftc_basic_family_load_glyph 281 }; 282 283 284 FT_CALLBACK_TABLE_DEF 285 const FTC_GCacheClassRec ftc_basic_image_cache_class = 286 { 287 { 288 ftc_inode_new, 289 ftc_inode_weight, 290 ftc_gnode_compare, 291 ftc_basic_gnode_compare_faceid, 292 ftc_inode_free, 293 294 sizeof ( FTC_GCacheRec ), 295 ftc_gcache_init, 296 ftc_gcache_done 297 }, 298 (FTC_MruListClass)&ftc_basic_image_family_class 299 }; 300 301 302 /* documentation is in ftcache.h */ 303 304 FT_EXPORT_DEF( FT_Error ) 305 FTC_ImageCache_New( FTC_Manager manager, 306 FTC_ImageCache *acache ) 307 { 308 return FTC_GCache_New( manager, &ftc_basic_image_cache_class, 309 (FTC_GCache*)acache ); 310 } 311 312 313 /* documentation is in ftcache.h */ 314 315 FT_EXPORT_DEF( FT_Error ) 316 FTC_ImageCache_Lookup( FTC_ImageCache cache, 317 FTC_ImageType type, 318 FT_UInt gindex, 319 FT_Glyph *aglyph, 320 FTC_Node *anode ) 321 { 322 FTC_BasicQueryRec query; 323 FTC_Node node = 0; /* make compiler happy */ 324 FT_Error error; 325 FT_PtrDist hash; 326 327 328 /* some argument checks are delayed to FTC_Cache_Lookup */ 329 if ( !aglyph ) 330 { 331 error = FTC_Err_Invalid_Argument; 332 goto Exit; 333 } 334 335 *aglyph = NULL; 336 if ( anode ) 337 *anode = NULL; 338 339#if defined( FT_CONFIG_OPTION_OLD_INTERNALS ) && ( FT_INT_MAX > 0xFFFFU ) 340 341 /* 342 * This one is a major hack used to detect whether we are passed a 343 * regular FTC_ImageType handle, or a legacy FTC_OldImageDesc one. 344 */ 345 if ( (FT_ULong)type->width >= 0x10000L ) 346 { 347 FTC_OldImageDesc desc = (FTC_OldImageDesc)type; 348 349 350 query.attrs.scaler.face_id = desc->font.face_id; 351 query.attrs.scaler.width = desc->font.pix_width; 352 query.attrs.scaler.height = desc->font.pix_height; 353 query.attrs.load_flags = desc->flags; 354 } 355 else 356 357#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 358 359 { 360 if ( (FT_ULong)(type->flags - FT_INT_MIN) > FT_UINT_MAX ) 361 { 362 FT_TRACE1(( "FTC_ImageCache_Lookup: higher bits in load_flags" )); 363 FT_TRACE1(( "0x%x are dropped\n", (type->flags & ~((FT_ULong)FT_UINT_MAX)) )); 364 } 365 366 query.attrs.scaler.face_id = type->face_id; 367 query.attrs.scaler.width = type->width; 368 query.attrs.scaler.height = type->height; 369 query.attrs.load_flags = (FT_UInt)type->flags; 370 } 371 372 query.attrs.scaler.pixel = 1; 373 query.attrs.scaler.x_res = 0; /* make compilers happy */ 374 query.attrs.scaler.y_res = 0; 375 376 hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex; 377 378#if 1 /* inlining is about 50% faster! */ 379 FTC_GCACHE_LOOKUP_CMP( cache, 380 ftc_basic_family_compare, 381 FTC_GNode_Compare, 382 hash, gindex, 383 &query, 384 node, 385 error ); 386#else 387 error = FTC_GCache_Lookup( FTC_GCACHE( cache ), 388 hash, gindex, 389 FTC_GQUERY( &query ), 390 &node ); 391#endif 392 if ( !error ) 393 { 394 *aglyph = FTC_INODE( node )->glyph; 395 396 if ( anode ) 397 { 398 *anode = node; 399 node->ref_count++; 400 } 401 } 402 403 Exit: 404 return error; 405 } 406 407 408 /* documentation is in ftcache.h */ 409 410 FT_EXPORT_DEF( FT_Error ) 411 FTC_ImageCache_LookupScaler( FTC_ImageCache cache, 412 FTC_Scaler scaler, 413 FT_ULong load_flags, 414 FT_UInt gindex, 415 FT_Glyph *aglyph, 416 FTC_Node *anode ) 417 { 418 FTC_BasicQueryRec query; 419 FTC_Node node = 0; /* make compiler happy */ 420 FT_Error error; 421 FT_PtrDist hash; 422 423 424 /* some argument checks are delayed to FTC_Cache_Lookup */ 425 if ( !aglyph || !scaler ) 426 { 427 error = FTC_Err_Invalid_Argument; 428 goto Exit; 429 } 430 431 *aglyph = NULL; 432 if ( anode ) 433 *anode = NULL; 434 435 /* FT_Load_Glyph(), FT_Load_Char() take FT_UInt flags */ 436 if ( load_flags > FT_UINT_MAX ) 437 { 438 FT_TRACE1(( "FTC_ImageCache_LookupScaler: higher bits in load_flags" )); 439 FT_TRACE1(( "0x%x are dropped\n", (load_flags & ~((FT_ULong)FT_UINT_MAX)) )); 440 } 441 442 query.attrs.scaler = scaler[0]; 443 query.attrs.load_flags = (FT_UInt)load_flags; 444 445 hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + gindex; 446 447 FTC_GCACHE_LOOKUP_CMP( cache, 448 ftc_basic_family_compare, 449 FTC_GNode_Compare, 450 hash, gindex, 451 &query, 452 node, 453 error ); 454 if ( !error ) 455 { 456 *aglyph = FTC_INODE( node )->glyph; 457 458 if ( anode ) 459 { 460 *anode = node; 461 node->ref_count++; 462 } 463 } 464 465 Exit: 466 return error; 467 } 468 469 470 471#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 472 473 /* yet another backwards-legacy structure */ 474 typedef struct FTC_OldImage_Desc_ 475 { 476 FTC_FontRec font; 477 FT_UInt image_type; 478 479 } FTC_OldImage_Desc; 480 481 482#define FTC_OLD_IMAGE_FORMAT( x ) ( (x) & 7 ) 483 484 485#define ftc_old_image_format_bitmap 0x0000 486#define ftc_old_image_format_outline 0x0001 487 488#define ftc_old_image_format_mask 0x000F 489 490#define ftc_old_image_flag_monochrome 0x0010 491#define ftc_old_image_flag_unhinted 0x0020 492#define ftc_old_image_flag_autohinted 0x0040 493#define ftc_old_image_flag_unscaled 0x0080 494#define ftc_old_image_flag_no_sbits 0x0100 495 496 /* monochrome bitmap */ 497#define ftc_old_image_mono ftc_old_image_format_bitmap | \ 498 ftc_old_image_flag_monochrome 499 500 /* anti-aliased bitmap */ 501#define ftc_old_image_grays ftc_old_image_format_bitmap 502 503 /* scaled outline */ 504#define ftc_old_image_outline ftc_old_image_format_outline 505 506 507 static void 508 ftc_image_type_from_old_desc( FTC_ImageType typ, 509 FTC_OldImage_Desc* desc ) 510 { 511 typ->face_id = desc->font.face_id; 512 typ->width = desc->font.pix_width; 513 typ->height = desc->font.pix_height; 514 515 /* convert image type flags to load flags */ 516 { 517 FT_UInt load_flags = FT_LOAD_DEFAULT; 518 FT_UInt type = desc->image_type; 519 520 521 /* determine load flags, depending on the font description's */ 522 /* image type */ 523 524 if ( FTC_OLD_IMAGE_FORMAT( type ) == ftc_old_image_format_bitmap ) 525 { 526 if ( type & ftc_old_image_flag_monochrome ) 527 load_flags |= FT_LOAD_MONOCHROME; 528 529 /* disable embedded bitmaps loading if necessary */ 530 if ( type & ftc_old_image_flag_no_sbits ) 531 load_flags |= FT_LOAD_NO_BITMAP; 532 } 533 else 534 { 535 /* we want an outline, don't load embedded bitmaps */ 536 load_flags |= FT_LOAD_NO_BITMAP; 537 538 if ( type & ftc_old_image_flag_unscaled ) 539 load_flags |= FT_LOAD_NO_SCALE; 540 } 541 542 /* always render glyphs to bitmaps */ 543 load_flags |= FT_LOAD_RENDER; 544 545 if ( type & ftc_old_image_flag_unhinted ) 546 load_flags |= FT_LOAD_NO_HINTING; 547 548 if ( type & ftc_old_image_flag_autohinted ) 549 load_flags |= FT_LOAD_FORCE_AUTOHINT; 550 551 typ->flags = load_flags; 552 } 553 } 554 555 556 FT_EXPORT( FT_Error ) 557 FTC_Image_Cache_New( FTC_Manager manager, 558 FTC_ImageCache *acache ); 559 560 FT_EXPORT( FT_Error ) 561 FTC_Image_Cache_Lookup( FTC_ImageCache icache, 562 FTC_OldImage_Desc* desc, 563 FT_UInt gindex, 564 FT_Glyph *aglyph ); 565 566 567 FT_EXPORT_DEF( FT_Error ) 568 FTC_Image_Cache_New( FTC_Manager manager, 569 FTC_ImageCache *acache ) 570 { 571 return FTC_ImageCache_New( manager, (FTC_ImageCache*)acache ); 572 } 573 574 575 576 FT_EXPORT_DEF( FT_Error ) 577 FTC_Image_Cache_Lookup( FTC_ImageCache icache, 578 FTC_OldImage_Desc* desc, 579 FT_UInt gindex, 580 FT_Glyph *aglyph ) 581 { 582 FTC_ImageTypeRec type0; 583 584 585 if ( !desc ) 586 return FTC_Err_Invalid_Argument; 587 588 ftc_image_type_from_old_desc( &type0, desc ); 589 590 return FTC_ImageCache_Lookup( (FTC_ImageCache)icache, 591 &type0, 592 gindex, 593 aglyph, 594 NULL ); 595 } 596 597#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 598 599 600 /* 601 * 602 * basic small bitmap cache 603 * 604 */ 605 606 607 FT_CALLBACK_TABLE_DEF 608 const FTC_SFamilyClassRec ftc_basic_sbit_family_class = 609 { 610 { 611 sizeof( FTC_BasicFamilyRec ), 612 ftc_basic_family_compare, 613 ftc_basic_family_init, 614 0, /* FTC_MruNode_ResetFunc */ 615 0 /* FTC_MruNode_DoneFunc */ 616 }, 617 ftc_basic_family_get_count, 618 ftc_basic_family_load_bitmap 619 }; 620 621 622 FT_CALLBACK_TABLE_DEF 623 const FTC_GCacheClassRec ftc_basic_sbit_cache_class = 624 { 625 { 626 ftc_snode_new, 627 ftc_snode_weight, 628 ftc_snode_compare, 629 ftc_basic_gnode_compare_faceid, 630 ftc_snode_free, 631 632 sizeof ( FTC_GCacheRec ), 633 ftc_gcache_init, 634 ftc_gcache_done 635 }, 636 (FTC_MruListClass)&ftc_basic_sbit_family_class 637 }; 638 639 640 /* documentation is in ftcache.h */ 641 642 FT_EXPORT_DEF( FT_Error ) 643 FTC_SBitCache_New( FTC_Manager manager, 644 FTC_SBitCache *acache ) 645 { 646 return FTC_GCache_New( manager, &ftc_basic_sbit_cache_class, 647 (FTC_GCache*)acache ); 648 } 649 650 651 /* documentation is in ftcache.h */ 652 653 FT_EXPORT_DEF( FT_Error ) 654 FTC_SBitCache_Lookup( FTC_SBitCache cache, 655 FTC_ImageType type, 656 FT_UInt gindex, 657 FTC_SBit *ansbit, 658 FTC_Node *anode ) 659 { 660 FT_Error error; 661 FTC_BasicQueryRec query; 662 FTC_Node node = 0; /* make compiler happy */ 663 FT_PtrDist hash; 664 665 666 if ( anode ) 667 *anode = NULL; 668 669 /* other argument checks delayed to FTC_Cache_Lookup */ 670 if ( !ansbit ) 671 return FTC_Err_Invalid_Argument; 672 673 *ansbit = NULL; 674 675#if defined( FT_CONFIG_OPTION_OLD_INTERNALS ) && ( FT_INT_MAX > 0xFFFFU ) 676 677 /* This one is a major hack used to detect whether we are passed a 678 * regular FTC_ImageType handle, or a legacy FTC_OldImageDesc one. 679 */ 680 if ( (FT_ULong)type->width >= 0x10000L ) 681 { 682 FTC_OldImageDesc desc = (FTC_OldImageDesc)type; 683 684 685 query.attrs.scaler.face_id = desc->font.face_id; 686 query.attrs.scaler.width = desc->font.pix_width; 687 query.attrs.scaler.height = desc->font.pix_height; 688 query.attrs.load_flags = desc->flags; 689 } 690 else 691 692#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 693 694 { 695 if ( (FT_ULong)(type->flags - FT_INT_MIN) > FT_UINT_MAX ) 696 { 697 FT_TRACE1(( "FTC_ImageCache_Lookup: higher bits in load_flags" )); 698 FT_TRACE1(( "0x%x are dropped\n", (type->flags & ~((FT_ULong)FT_UINT_MAX)) )); 699 } 700 701 query.attrs.scaler.face_id = type->face_id; 702 query.attrs.scaler.width = type->width; 703 query.attrs.scaler.height = type->height; 704 query.attrs.load_flags = (FT_UInt)type->flags; 705 } 706 707 query.attrs.scaler.pixel = 1; 708 query.attrs.scaler.x_res = 0; /* make compilers happy */ 709 query.attrs.scaler.y_res = 0; 710 711 /* beware, the hash must be the same for all glyph ranges! */ 712 hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + 713 gindex / FTC_SBIT_ITEMS_PER_NODE; 714 715#if 1 /* inlining is about 50% faster! */ 716 FTC_GCACHE_LOOKUP_CMP( cache, 717 ftc_basic_family_compare, 718 FTC_SNode_Compare, 719 hash, gindex, 720 &query, 721 node, 722 error ); 723#else 724 error = FTC_GCache_Lookup( FTC_GCACHE( cache ), 725 hash, 726 gindex, 727 FTC_GQUERY( &query ), 728 &node ); 729#endif 730 if ( error ) 731 goto Exit; 732 733 *ansbit = FTC_SNODE( node )->sbits + 734 ( gindex - FTC_GNODE( node )->gindex ); 735 736 if ( anode ) 737 { 738 *anode = node; 739 node->ref_count++; 740 } 741 742 Exit: 743 return error; 744 } 745 746 747 /* documentation is in ftcache.h */ 748 749 FT_EXPORT_DEF( FT_Error ) 750 FTC_SBitCache_LookupScaler( FTC_SBitCache cache, 751 FTC_Scaler scaler, 752 FT_ULong load_flags, 753 FT_UInt gindex, 754 FTC_SBit *ansbit, 755 FTC_Node *anode ) 756 { 757 FT_Error error; 758 FTC_BasicQueryRec query; 759 FTC_Node node = 0; /* make compiler happy */ 760 FT_PtrDist hash; 761 762 763 if ( anode ) 764 *anode = NULL; 765 766 /* other argument checks delayed to FTC_Cache_Lookup */ 767 if ( !ansbit || !scaler ) 768 return FTC_Err_Invalid_Argument; 769 770 *ansbit = NULL; 771 772 /* FT_Load_Glyph(), FT_Load_Char() take FT_UInt flags */ 773 if ( load_flags > FT_UINT_MAX ) 774 { 775 FT_TRACE1(( "FTC_ImageCache_LookupScaler: higher bits in load_flags" )); 776 FT_TRACE1(( "0x%x are dropped\n", (load_flags & ~((FT_ULong)FT_UINT_MAX)) )); 777 } 778 779 query.attrs.scaler = scaler[0]; 780 query.attrs.load_flags = (FT_UInt)load_flags; 781 782 /* beware, the hash must be the same for all glyph ranges! */ 783 hash = FTC_BASIC_ATTR_HASH( &query.attrs ) + 784 gindex / FTC_SBIT_ITEMS_PER_NODE; 785 786 FTC_GCACHE_LOOKUP_CMP( cache, 787 ftc_basic_family_compare, 788 FTC_SNode_Compare, 789 hash, gindex, 790 &query, 791 node, 792 error ); 793 if ( error ) 794 goto Exit; 795 796 *ansbit = FTC_SNODE( node )->sbits + 797 ( gindex - FTC_GNODE( node )->gindex ); 798 799 if ( anode ) 800 { 801 *anode = node; 802 node->ref_count++; 803 } 804 805 Exit: 806 return error; 807 } 808 809 810#ifdef FT_CONFIG_OPTION_OLD_INTERNALS 811 812 FT_EXPORT( FT_Error ) 813 FTC_SBit_Cache_New( FTC_Manager manager, 814 FTC_SBitCache *acache ); 815 816 FT_EXPORT( FT_Error ) 817 FTC_SBit_Cache_Lookup( FTC_SBitCache cache, 818 FTC_OldImage_Desc* desc, 819 FT_UInt gindex, 820 FTC_SBit *ansbit ); 821 822 823 FT_EXPORT_DEF( FT_Error ) 824 FTC_SBit_Cache_New( FTC_Manager manager, 825 FTC_SBitCache *acache ) 826 { 827 return FTC_SBitCache_New( manager, (FTC_SBitCache*)acache ); 828 } 829 830 831 FT_EXPORT_DEF( FT_Error ) 832 FTC_SBit_Cache_Lookup( FTC_SBitCache cache, 833 FTC_OldImage_Desc* desc, 834 FT_UInt gindex, 835 FTC_SBit *ansbit ) 836 { 837 FTC_ImageTypeRec type0; 838 839 840 if ( !desc ) 841 return FTC_Err_Invalid_Argument; 842 843 ftc_image_type_from_old_desc( &type0, desc ); 844 845 return FTC_SBitCache_Lookup( (FTC_SBitCache)cache, 846 &type0, 847 gindex, 848 ansbit, 849 NULL ); 850 } 851 852#endif /* FT_CONFIG_OPTION_OLD_INTERNALS */ 853 854 855/* END */ 856