lib/3rdparty/freetype/src/cache/ftcbasic.c

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