granicus.if.org Git - imagemagick/blob - MagickCore/cache-view.c

   1 /*
   2 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
   3 %                                                                             %
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  11 %                                                                             %
  12 %                        V   V  IIIII  EEEEE  W   W                           %
  13 %                        V   V    I    E      W   W                           %
  14 %                        V   V    I    EEE    W W W                           %
  15 %                         V V     I    E      WW WW                           %
  16 %                          V    IIIII  EEEEE  W   W                           %
  17 %                                                                             %
  18 %                                                                             %
  19 %                        MagickCore Cache View Methods                        %
  20 %                                                                             %
  21 %                              Software Design                                %
  22 %                                John Cristy                                  %
  23 %                               February 2000                                 %
  24 %                                                                             %
  25 %                                                                             %
  26 %  Copyright 1999-2011 ImageMagick Studio LLC, a non-profit organization      %
  27 %  dedicated to making software imaging solutions freely available.           %
  28 %                                                                             %
  29 %  You may not use this file except in compliance with the License.  You may  %
  30 %  obtain a copy of the License at                                            %
  31 %                                                                             %
  32 %    http://www.imagemagick.org/script/license.php                            %
  33 %                                                                             %
  34 %  Unless required by applicable law or agreed to in writing, software        %
  35 %  distributed under the License is distributed on an "AS IS" BASIS,          %
  36 %  WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.   %
  37 %  See the License for the specific language governing permissions and        %
  38 %  limitations under the License.                                             %
  39 %                                                                             %
  40 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  41 %
  42 %
  43 %
  44 */
  45 \f
  46 /*
  47   Include declarations.
  48 */
  49 #include "MagickCore/studio.h"
  50 #include "MagickCore/cache.h"
  51 #include "MagickCore/cache-private.h"
  52 #include "MagickCore/cache-view.h"
  53 #include "MagickCore/memory_.h"
  54 #include "MagickCore/exception.h"
  55 #include "MagickCore/exception-private.h"
  56 #include "MagickCore/pixel-accessor.h"
  57 #include "MagickCore/string_.h"
  58 #include "MagickCore/thread-private.h"
  59 \f
  60 /*
  61   Typedef declarations.
  62 */
  63 struct _CacheView
  64 {
  65   Image
  66     *image;
  67
  68   VirtualPixelMethod
  69     virtual_pixel_method;
  70
  71   size_t
  72     number_threads;
  73
  74   NexusInfo
  75     **nexus_info;
  76
  77   MagickBooleanType
  78     debug;
  79
  80   size_t
  81     signature;
  82 };
  83 \f
  84 /*
  85 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  86 %                                                                             %
  87 %                                                                             %
  88 %                                                                             %
  89 %   A c q u i r e C a c h e V i e w                                           %
  90 %                                                                             %
  91 %                                                                             %
  92 %                                                                             %
  93 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
  94 %
  95 %  AcquireCacheView() acquires a view into the pixel cache, using the
  96 %  VirtualPixelMethod that is defined within the given image itself.
  97 %
  98 %  The format of the AcquireCacheView method is:
  99 %
 100 %      CacheView *AcquireCacheView(const Image *image)
 101 %
 102 %  A description of each parameter follows:
 103 %
 104 %    o image: the image.
 105 %
 106 */
 107 MagickExport CacheView *AcquireCacheView(const Image *image)
 108 {
 109   CacheView
 110     *cache_view;
 111
 112   assert(image != (Image *) NULL);
 113   assert(image->signature == MagickSignature);
 114   if (image->debug != MagickFalse)
 115     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
 116   cache_view=(CacheView *) AcquireAlignedMemory(1,sizeof(*cache_view));
 117   if (cache_view == (CacheView *) NULL)
 118     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 119   (void) ResetMagickMemory(cache_view,0,sizeof(*cache_view));
 120   cache_view->image=ReferenceImage((Image *) image);
 121   cache_view->number_threads=GetOpenMPMaximumThreads();
 122   cache_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
 123   cache_view->virtual_pixel_method=GetImageVirtualPixelMethod(image);
 124   cache_view->debug=IsEventLogging();
 125   cache_view->signature=MagickSignature;
 126   if (cache_view->nexus_info == (NexusInfo **) NULL)
 127     ThrowFatalException(CacheFatalError,"UnableToAcquireCacheView");
 128   return(cache_view);
 129 }
 130 \f
 131 /*
 132 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 133 %                                                                             %
 134 %                                                                             %
 135 %                                                                             %
 136 %   C l o n e C a c h e V i e w                                               %
 137 %                                                                             %
 138 %                                                                             %
 139 %                                                                             %
 140 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 141 %
 142 %  CloneCacheView()  makes an exact copy of the specified cache view.
 143 %
 144 %  The format of the CloneCacheView method is:
 145 %
 146 %      CacheView *CloneCacheView(const CacheView *cache_view)
 147 %
 148 %  A description of each parameter follows:
 149 %
 150 %    o cache_view: the cache view.
 151 %
 152 */
 153 MagickExport CacheView *CloneCacheView(const CacheView *cache_view)
 154 {
 155   CacheView
 156     *clone_view;
 157
 158   assert(cache_view != (CacheView *) NULL);
 159   assert(cache_view->signature == MagickSignature);
 160   if (cache_view->debug != MagickFalse)
 161     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 162       cache_view->image->filename);
 163   clone_view=(CacheView *) AcquireAlignedMemory(1,sizeof(*clone_view));
 164   if (clone_view == (CacheView *) NULL)
 165     ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
 166   (void) ResetMagickMemory(clone_view,0,sizeof(*clone_view));
 167   clone_view->image=ReferenceImage(cache_view->image);
 168   clone_view->number_threads=cache_view->number_threads;
 169   clone_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
 170   clone_view->virtual_pixel_method=cache_view->virtual_pixel_method;
 171   clone_view->debug=cache_view->debug;
 172   clone_view->signature=MagickSignature;
 173   return(clone_view);
 174 }
 175 \f
 176 /*
 177 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 178 %                                                                             %
 179 %                                                                             %
 180 %                                                                             %
 181 %   D e s t r o y C a c h e V i e w                                           %
 182 %                                                                             %
 183 %                                                                             %
 184 %                                                                             %
 185 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 186 %
 187 %  DestroyCacheView() destroys the specified view returned by a previous call
 188 %  to AcquireCacheView().
 189 %
 190 %  The format of the DestroyCacheView method is:
 191 %
 192 %      CacheView *DestroyCacheView(CacheView *cache_view)
 193 %
 194 %  A description of each parameter follows:
 195 %
 196 %    o cache_view: the cache view.
 197 %
 198 */
 199 MagickExport CacheView *DestroyCacheView(CacheView *cache_view)
 200 {
 201   assert(cache_view != (CacheView *) NULL);
 202   assert(cache_view->signature == MagickSignature);
 203   if (cache_view->debug != MagickFalse)
 204     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 205       cache_view->image->filename);
 206   if (cache_view->nexus_info != (NexusInfo **) NULL)
 207     cache_view->nexus_info=DestroyPixelCacheNexus(cache_view->nexus_info,
 208       cache_view->number_threads);
 209   cache_view->image=DestroyImage(cache_view->image);
 210   cache_view->signature=(~MagickSignature);
 211   cache_view=(CacheView *) RelinquishMagickMemory(cache_view);
 212   return(cache_view);
 213 }
 214 \f
 215 /*
 216 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 217 %                                                                             %
 218 %                                                                             %
 219 %                                                                             %
 220 %   G e t C a c h e V i e w C o l o r s p a c e                               %
 221 %                                                                             %
 222 %                                                                             %
 223 %                                                                             %
 224 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 225 %
 226 %  GetCacheViewColorspace() returns the image colorspace associated with the
 227 %  specified view.
 228 %
 229 %  The format of the GetCacheViewColorspace method is:
 230 %
 231 %      ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
 232 %
 233 %  A description of each parameter follows:
 234 %
 235 %    o cache_view: the cache view.
 236 %
 237 */
 238 MagickExport ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
 239 {
 240   assert(cache_view != (CacheView *) NULL);
 241   assert(cache_view->signature == MagickSignature);
 242   if (cache_view->debug != MagickFalse)
 243     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 244       cache_view->image->filename);
 245   return(GetPixelCacheColorspace(cache_view->image->cache));
 246 }
 247 \f
 248 /*
 249 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 250 %                                                                             %
 251 %                                                                             %
 252 %                                                                             %
 253 %   G e t C a c h e V i e w E x c e p t i o n                                 %
 254 %                                                                             %
 255 %                                                                             %
 256 %                                                                             %
 257 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 258 %
 259 %  GetCacheViewException() returns the image exception associated with the
 260 %  specified view.
 261 %
 262 %  The format of the GetCacheViewException method is:
 263 %
 264 %      ExceptionInfo GetCacheViewException(const CacheView *cache_view)
 265 %
 266 %  A description of each parameter follows:
 267 %
 268 %    o cache_view: the cache view.
 269 %
 270 */
 271 MagickExport ExceptionInfo *GetCacheViewException(const CacheView *cache_view)
 272 {
 273   assert(cache_view != (CacheView *) NULL);
 274   assert(cache_view->signature == MagickSignature);
 275   if (cache_view->debug != MagickFalse)
 276     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 277       cache_view->image->filename);
 278   return(&cache_view->image->exception);
 279 }
 280 \f
 281 /*
 282 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 283 %                                                                             %
 284 %                                                                             %
 285 %                                                                             %
 286 +   G e t C a c h e V i e w E x t e n t                                       %
 287 %                                                                             %
 288 %                                                                             %
 289 %                                                                             %
 290 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 291 %
 292 %  GetCacheViewExtent() returns the extent of the pixels associated with the
 293 %  last call to QueueCacheViewAuthenticPixels() or
 294 %  GetCacheViewAuthenticPixels().
 295 %
 296 %  The format of the GetCacheViewExtent() method is:
 297 %
 298 %      MagickSizeType GetCacheViewExtent(const CacheView *cache_view)
 299 %
 300 %  A description of each parameter follows:
 301 %
 302 %    o cache_view: the cache view.
 303 %
 304 */
 305 MagickExport MagickSizeType GetCacheViewExtent(const CacheView *cache_view)
 306 {
 307   const int
 308     id = GetOpenMPThreadId();
 309
 310   MagickSizeType
 311     extent;
 312
 313   assert(cache_view != (CacheView *) NULL);
 314   assert(cache_view->signature == MagickSignature);
 315   if (cache_view->debug != MagickFalse)
 316     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 317       cache_view->image->filename);
 318   assert(cache_view->image->cache != (Cache) NULL);
 319   assert(id < (int) cache_view->number_threads);
 320   extent=GetPixelCacheNexusExtent(cache_view->image->cache,
 321     cache_view->nexus_info[id]);
 322   return(extent);
 323 }
 324 \f
 325 /*
 326 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 327 %                                                                             %
 328 %                                                                             %
 329 %                                                                             %
 330 %   G e t C a c h e V i e w S t o r a g e C l a s s                           %
 331 %                                                                             %
 332 %                                                                             %
 333 %                                                                             %
 334 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 335 %
 336 %  GetCacheViewStorageClass() returns the image storage class  associated with
 337 %  the specified view.
 338 %
 339 %  The format of the GetCacheViewStorageClass method is:
 340 %
 341 %      ClassType GetCacheViewStorageClass(const CacheView *cache_view)
 342 %
 343 %  A description of each parameter follows:
 344 %
 345 %    o cache_view: the cache view.
 346 %
 347 */
 348 MagickExport ClassType GetCacheViewStorageClass(const CacheView *cache_view)
 349 {
 350   assert(cache_view != (CacheView *) NULL);
 351   assert(cache_view->signature == MagickSignature);
 352   if (cache_view->debug != MagickFalse)
 353     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 354       cache_view->image->filename);
 355   return(GetPixelCacheStorageClass(cache_view->image->cache));
 356 }
 357 \f
 358 /*
 359 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 360 %                                                                             %
 361 %                                                                             %
 362 %                                                                             %
 363 %   G e t C a c h e V i e w A u t h e n t i c P i x e l s                     %
 364 %                                                                             %
 365 %                                                                             %
 366 %                                                                             %
 367 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 368 %
 369 %  GetCacheViewAuthenticPixels() gets pixels from the in-memory or disk pixel
 370 %  cache as defined by the geometry parameters.   A pointer to the pixels is
 371 %  returned if the pixels are transferred, otherwise a NULL is returned.
 372 %
 373 %  The format of the GetCacheViewAuthenticPixels method is:
 374 %
 375 %      Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
 376 %        const ssize_t x,const ssize_t y,const size_t columns,
 377 %        const size_t rows,ExceptionInfo *exception)
 378 %
 379 %  A description of each parameter follows:
 380 %
 381 %    o cache_view: the cache view.
 382 %
 383 %    o x,y,columns,rows:  These values define the perimeter of a region of
 384 %      pixels.
 385 %
 386 */
 387 MagickExport Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
 388   const ssize_t x,const ssize_t y,const size_t columns,const size_t rows,
 389   ExceptionInfo *exception)
 390 {
 391   const int
 392     id = GetOpenMPThreadId();
 393
 394   Quantum
 395     *pixels;
 396
 397   assert(cache_view != (CacheView *) NULL);
 398   assert(cache_view->signature == MagickSignature);
 399   assert(id < (int) cache_view->number_threads);
 400   pixels=GetAuthenticPixelCacheNexus(cache_view->image,x,y,columns,rows,
 401     cache_view->nexus_info[id],exception);
 402   return(pixels);
 403 }
 404 \f
 405 /*
 406 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 407 %                                                                             %
 408 %                                                                             %
 409 %                                                                             %
 410 %   G e t C a c h e V i e w A u t h e n t i c M e t a c o n t e n t           %
 411 %                                                                             %
 412 %                                                                             %
 413 %                                                                             %
 414 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 415 %
 416 %  GetCacheViewAuthenticMetacontent() returns the meta-content corresponding
 417 %  with the last call to SetCacheViewIndexes() or
 418 %  GetCacheViewAuthenticMetacontent().  The meta-content are authentic and can
 419 %  be updated.
 420 %
 421 %  The format of the GetCacheViewAuthenticMetacontent() method is:
 422 %
 423 %      void *GetCacheViewAuthenticMetacontent(CacheView *cache_view)
 424 %
 425 %  A description of each parameter follows:
 426 %
 427 %    o cache_view: the cache view.
 428 %
 429 */
 430 MagickExport void *GetCacheViewAuthenticMetacontent(
 431   CacheView *cache_view)
 432 {
 433   const int
 434     id = GetOpenMPThreadId();
 435
 436   void
 437     *metacontent;
 438
 439   assert(cache_view != (CacheView *) NULL);
 440   assert(cache_view->signature == MagickSignature);
 441   assert(cache_view->image->cache != (Cache) NULL);
 442   assert(id < (int) cache_view->number_threads);
 443   metacontent=GetPixelCacheNexusMetacontent(cache_view->image->cache,
 444     cache_view->nexus_info[id]);
 445   return(metacontent);
 446 }
 447 \f
 448 /*
 449 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 450 %                                                                             %
 451 %                                                                             %
 452 %                                                                             %
 453 %   G e t C a c h e V i e w A u t h e n t i c P i x e l Q u e u e             %
 454 %                                                                             %
 455 %                                                                             %
 456 %                                                                             %
 457 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 458 %
 459 %  GetCacheViewAuthenticPixelQueue() returns the pixels associated with the
 460 %  last call to QueueCacheViewAuthenticPixels() or
 461 %  GetCacheViewAuthenticPixels().  The pixels are authentic and therefore can be
 462 %  updated.
 463 %
 464 %  The format of the GetCacheViewAuthenticPixelQueue() method is:
 465 %
 466 %      Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
 467 %
 468 %  A description of each parameter follows:
 469 %
 470 %    o cache_view: the cache view.
 471 %
 472 */
 473 MagickExport Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
 474 {
 475   const int
 476     id = GetOpenMPThreadId();
 477
 478   Quantum
 479     *pixels;
 480
 481   assert(cache_view != (CacheView *) NULL);
 482   assert(cache_view->signature == MagickSignature);
 483   assert(cache_view->image->cache != (Cache) NULL);
 484   assert(id < (int) cache_view->number_threads);
 485   pixels=GetPixelCacheNexusPixels(cache_view->image->cache,
 486     cache_view->nexus_info[id]);
 487   return(pixels);
 488 }
 489 \f
 490 /*
 491 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 492 %                                                                             %
 493 %                                                                             %
 494 %                                                                             %
 495 %   G e t C a c h e V i e w V i r t u a l M e t a c o n t e n t               %
 496 %                                                                             %
 497 %                                                                             %
 498 %                                                                             %
 499 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 500 %
 501 %  GetCacheViewVirtualMetacontent() returns the meta-content corresponding
 502 %  with the last call to GetCacheViewVirtualMetacontent().  The meta-content
 503 %  is virtual and therefore cannot be updated.
 504 %
 505 %  The format of the GetCacheViewVirtualMetacontent() method is:
 506 %
 507 %      const void *GetCacheViewVirtualMetacontent(
 508 %        const CacheView *cache_view)
 509 %
 510 %  A description of each parameter follows:
 511 %
 512 %    o cache_view: the cache view.
 513 %
 514 */
 515 MagickExport const void *GetCacheViewVirtualMetacontent(
 516   const CacheView *cache_view)
 517 {
 518   const int
 519     id = GetOpenMPThreadId();
 520
 521   const void
 522     *metacontent;
 523
 524   assert(cache_view != (const CacheView *) NULL);
 525   assert(cache_view->signature == MagickSignature);
 526   assert(cache_view->image->cache != (Cache) NULL);
 527   assert(id < (int) cache_view->number_threads);
 528   metacontent=GetVirtualMetacontentFromNexus(cache_view->image->cache,
 529     cache_view->nexus_info[id]);
 530   return(metacontent);
 531 }
 532 \f
 533 /*
 534 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 535 %                                                                             %
 536 %                                                                             %
 537 %                                                                             %
 538 %   G e t C a c h e V i e w V i r t u a l P i x e l Q u e u e                 %
 539 %                                                                             %
 540 %                                                                             %
 541 %                                                                             %
 542 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 543 %
 544 %  GetCacheViewVirtualPixelQueue() returns the the pixels associated with
 545 %  the last call to GetCacheViewVirtualPixels().  The pixels are virtual
 546 %  and therefore cannot be updated.
 547 %
 548 %  The format of the GetCacheViewVirtualPixelQueue() method is:
 549 %
 550 %      const Quantum *GetCacheViewVirtualPixelQueue(
 551 %        const CacheView *cache_view)
 552 %
 553 %  A description of each parameter follows:
 554 %
 555 %    o cache_view: the cache view.
 556 %
 557 */
 558 MagickExport const Quantum *GetCacheViewVirtualPixelQueue(
 559   const CacheView *cache_view)
 560 {
 561   const int
 562     id = GetOpenMPThreadId();
 563
 564   const Quantum
 565     *pixels;
 566
 567   assert(cache_view != (const CacheView *) NULL);
 568   assert(cache_view->signature == MagickSignature);
 569   assert(cache_view->image->cache != (Cache) NULL);
 570   assert(id < (int) cache_view->number_threads);
 571   pixels=GetVirtualPixelsNexus(cache_view->image->cache,
 572     cache_view->nexus_info[id]);
 573   return(pixels);
 574 }
 575 \f
 576 /*
 577 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 578 %                                                                             %
 579 %                                                                             %
 580 %                                                                             %
 581 %   G e t C a c h e V i e w V i r t u a l P i x e l s                         %
 582 %                                                                             %
 583 %                                                                             %
 584 %                                                                             %
 585 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 586 %
 587 %  GetCacheViewVirtualPixels() gets virtual pixels from the in-memory or
 588 %  disk pixel cache as defined by the geometry parameters.   A pointer to the
 589 %  pixels is returned if the pixels are transferred, otherwise a NULL is
 590 %  returned.
 591 %
 592 %  The format of the GetCacheViewVirtualPixels method is:
 593 %
 594 %      const Quantum *GetCacheViewVirtualPixels(
 595 %        const CacheView *cache_view,const ssize_t x,const ssize_t y,
 596 %        const size_t columns,const size_t rows,ExceptionInfo *exception)
 597 %
 598 %  A description of each parameter follows:
 599 %
 600 %    o cache_view: the cache view.
 601 %
 602 %    o x,y,columns,rows:  These values define the perimeter of a region of
 603 %      pixels.
 604 %
 605 %    o exception: return any errors or warnings in this structure.
 606 %
 607 */
 608 MagickExport const Quantum *GetCacheViewVirtualPixels(
 609   const CacheView *cache_view,const ssize_t x,const ssize_t y,
 610   const size_t columns,const size_t rows,ExceptionInfo *exception)
 611 {
 612   const int
 613     id = GetOpenMPThreadId();
 614
 615   const Quantum
 616     *pixels;
 617
 618   assert(cache_view != (CacheView *) NULL);
 619   assert(cache_view->signature == MagickSignature);
 620   assert(id < (int) cache_view->number_threads);
 621   pixels=GetVirtualPixelsFromNexus(cache_view->image,
 622     cache_view->virtual_pixel_method,x,y,columns,rows,
 623     cache_view->nexus_info[id],exception);
 624   return(pixels);
 625 }
 626 \f
 627 /*
 628 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 629 %                                                                             %
 630 %                                                                             %
 631 %                                                                             %
 632 %   G e t O n e C a c h e V i e w A u t h e n t i c P i x e l                 %
 633 %                                                                             %
 634 %                                                                             %
 635 %                                                                             %
 636 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 637 %
 638 %  GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y)
 639 %  location.  The image background color is returned if an error occurs.
 640 %
 641 %  The format of the GetOneCacheViewAuthenticPixel method is:
 642 %
 643 %      MagickBooleaNType GetOneCacheViewAuthenticPixel(
 644 %        const CacheView *cache_view,const ssize_t x,const ssize_t y,
 645 %        PixelPacket *pixel,ExceptionInfo *exception)
 646 %
 647 %  A description of each parameter follows:
 648 %
 649 %    o cache_view: the cache view.
 650 %
 651 %    o x,y:  These values define the offset of the pixel.
 652 %
 653 %    o pixel: return a pixel at the specified (x,y) location.
 654 %
 655 %    o exception: return any errors or warnings in this structure.
 656 %
 657 */
 658 MagickExport MagickBooleanType GetOneCacheViewAuthenticPixel(
 659   const CacheView *cache_view,const ssize_t x,const ssize_t y,
 660   PixelPacket *pixel,ExceptionInfo *exception)
 661 {
 662   const int
 663     id = GetOpenMPThreadId();
 664
 665   Quantum
 666     *p;
 667
 668   assert(cache_view != (CacheView *) NULL);
 669   assert(cache_view->signature == MagickSignature);
 670   *pixel=cache_view->image->background_color;
 671   assert(id < (int) cache_view->number_threads);
 672   p=GetAuthenticPixelCacheNexus(cache_view->image,x,y,1,1,
 673     cache_view->nexus_info[id],exception);
 674   if (p == (const Quantum *) NULL)
 675     return(MagickFalse);
 676   GetPixelPacket(cache_view->image,p,pixel);
 677   if (GetPixelCacheColorspace(cache_view->image->cache) == CMYKColorspace)
 678     pixel->black=GetPixelBlack(cache_view->image,p);
 679   return(MagickTrue);
 680 }
 681 \f
 682 /*
 683 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 684 %                                                                             %
 685 %                                                                             %
 686 %                                                                             %
 687 %   G e t O n e C a c h e V i e w V i r t u a l P i x e l                     %
 688 %                                                                             %
 689 %                                                                             %
 690 %                                                                             %
 691 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 692 %
 693 %  GetOneCacheViewVirtualPixel() returns a single pixel at the specified (x,y)
 694 %  location.  The image background color is returned if an error occurs.  If
 695 %  you plan to modify the pixel, use GetOneCacheViewAuthenticPixel() instead.
 696 %
 697 %  The format of the GetOneCacheViewVirtualPixel method is:
 698 %
 699 %      MagickBooleanType GetOneCacheViewVirtualPixel(
 700 %        const CacheView *cache_view,const ssize_t x,const ssize_t y,
 701 %        PixelPacket *pixel,ExceptionInfo *exception)
 702 %
 703 %  A description of each parameter follows:
 704 %
 705 %    o cache_view: the cache view.
 706 %
 707 %    o x,y:  These values define the offset of the pixel.
 708 %
 709 %    o pixel: return a pixel at the specified (x,y) location.
 710 %
 711 %    o exception: return any errors or warnings in this structure.
 712 %
 713 */
 714 MagickExport MagickBooleanType GetOneCacheViewVirtualPixel(
 715   const CacheView *cache_view,const ssize_t x,const ssize_t y,
 716   PixelPacket *pixel,ExceptionInfo *exception)
 717 {
 718   const int
 719     id = GetOpenMPThreadId();
 720
 721   const Quantum
 722     *p;
 723
 724   assert(cache_view != (CacheView *) NULL);
 725   assert(cache_view->signature == MagickSignature);
 726   *pixel=cache_view->image->background_color;
 727   assert(id < (int) cache_view->number_threads);
 728   p=GetVirtualPixelsFromNexus(cache_view->image,
 729     cache_view->virtual_pixel_method,x,y,1,1,cache_view->nexus_info[id],
 730     exception);
 731   if (p == (const Quantum *) NULL)
 732     return(MagickFalse);
 733   GetPixelPacket(cache_view->image,p,pixel);
 734   if (GetPixelCacheColorspace(cache_view->image->cache) == CMYKColorspace)
 735     pixel->black=GetPixelBlack(cache_view->image,p);
 736   return(MagickTrue);
 737 }
 738 \f
 739 /*
 740 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 741 %                                                                             %
 742 %                                                                             %
 743 %                                                                             %
 744 %   G e t O n e C a c h e V i e w V i r t u a l P i x e l                     %
 745 %                                                                             %
 746 %                                                                             %
 747 %                                                                             %
 748 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 749 %
 750 %  GetOneCacheViewVirtualMethodPixel() returns a single virtual pixel at
 751 %  the specified (x,y) location.  The image background color is returned if an
 752 %  error occurs.  If you plan to modify the pixel, use
 753 %  GetOneCacheViewAuthenticPixel() instead.
 754 %
 755 %  The format of the GetOneCacheViewVirtualPixel method is:
 756 %
 757 %      MagickBooleanType GetOneCacheViewVirtualMethodPixel(
 758 %        const CacheView *cache_view,
 759 %        const VirtualPixelMethod virtual_pixel_method,const ssize_t x,
 760 %        const ssize_t y,PixelPacket *pixel,ExceptionInfo *exception)
 761 %
 762 %  A description of each parameter follows:
 763 %
 764 %    o cache_view: the cache view.
 765 %
 766 %    o virtual_pixel_method: the virtual pixel method.
 767 %
 768 %    o x,y:  These values define the offset of the pixel.
 769 %
 770 %    o pixel: return a pixel at the specified (x,y) location.
 771 %
 772 %    o exception: return any errors or warnings in this structure.
 773 %
 774 */
 775 MagickExport MagickBooleanType GetOneCacheViewVirtualMethodPixel(
 776   const CacheView *cache_view,const VirtualPixelMethod virtual_pixel_method,
 777   const ssize_t x,const ssize_t y,PixelPacket *pixel,ExceptionInfo *exception)
 778 {
 779   const int
 780     id = GetOpenMPThreadId();
 781
 782   const Quantum
 783     *p;
 784
 785   assert(cache_view != (CacheView *) NULL);
 786   assert(cache_view->signature == MagickSignature);
 787   *pixel=cache_view->image->background_color;
 788   assert(id < (int) cache_view->number_threads);
 789   p=GetVirtualPixelsFromNexus(cache_view->image,virtual_pixel_method,x,y,1,1,
 790     cache_view->nexus_info[id],exception);
 791   if (p == (const Quantum *) NULL)
 792     return(MagickFalse);
 793   GetPixelPacket(cache_view->image,p,pixel);
 794   if (GetPixelCacheColorspace(cache_view->image->cache) == CMYKColorspace)
 795     pixel->black=GetPixelBlack(cache_view->image,p);
 796   return(MagickTrue);
 797 }
 798 \f
 799 /*
 800 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 801 %                                                                             %
 802 %                                                                             %
 803 %                                                                             %
 804 %   Q u e u e C a c h e V i e w A u t h e n t i c P i x e l s                 %
 805 %                                                                             %
 806 %                                                                             %
 807 %                                                                             %
 808 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 809 %
 810 %  QueueCacheViewAuthenticPixels() queues authentic pixels from the in-memory or
 811 %  disk pixel cache as defined by the geometry parameters.   A pointer to the
 812 %  pixels is returned if the pixels are transferred, otherwise a NULL is
 813 %  returned.
 814 %
 815 %  The format of the QueueCacheViewAuthenticPixels method is:
 816 %
 817 %      Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
 818 %        const ssize_t x,const ssize_t y,const size_t columns,
 819 %        const size_t rows,ExceptionInfo *exception)
 820 %
 821 %  A description of each parameter follows:
 822 %
 823 %    o cache_view: the cache view.
 824 %
 825 %    o x,y,columns,rows:  These values define the perimeter of a region of
 826 %      pixels.
 827 %
 828 %    o exception: return any errors or warnings in this structure.
 829 %
 830 */
 831 MagickExport Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
 832   const ssize_t x,const ssize_t y,const size_t columns,const size_t rows,
 833   ExceptionInfo *exception)
 834 {
 835   const int
 836     id = GetOpenMPThreadId();
 837
 838   Quantum
 839     *pixels;
 840
 841   assert(cache_view != (CacheView *) NULL);
 842   assert(cache_view->signature == MagickSignature);
 843   assert(id < (int) cache_view->number_threads);
 844   pixels=QueueAuthenticNexus(cache_view->image,x,y,columns,rows,
 845     cache_view->nexus_info[id],exception);
 846   return(pixels);
 847 }
 848 \f
 849 /*
 850 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 851 %                                                                             %
 852 %                                                                             %
 853 %                                                                             %
 854 %   S e t C a c h e V i e w S t o r a g e C l a s s                           %
 855 %                                                                             %
 856 %                                                                             %
 857 %                                                                             %
 858 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 859 %
 860 %  SetCacheViewStorageClass() sets the image storage class associated with
 861 %  the specified view.
 862 %
 863 %  The format of the SetCacheViewStorageClass method is:
 864 %
 865 %      MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
 866 %        const ClassType storage_class)
 867 %
 868 %  A description of each parameter follows:
 869 %
 870 %    o cache_view: the cache view.
 871 %
 872 %    o storage_class: the image storage class: PseudoClass or DirectClass.
 873 %
 874 */
 875 MagickExport MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
 876   const ClassType storage_class)
 877 {
 878   MagickBooleanType
 879     status;
 880
 881   assert(cache_view != (CacheView *) NULL);
 882   assert(cache_view->signature == MagickSignature);
 883   if (cache_view->debug != MagickFalse)
 884     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 885       cache_view->image->filename);
 886   status=SetImageStorageClass(cache_view->image,storage_class,
 887     &cache_view->image->exception);
 888   return(status);
 889 }
 890 \f
 891 /*
 892 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 893 %                                                                             %
 894 %                                                                             %
 895 %                                                                             %
 896 %   S e t C a c h e V i e w V i r t u a l P i x e l M e t h o d               %
 897 %                                                                             %
 898 %                                                                             %
 899 %                                                                             %
 900 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 901 %
 902 %  SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated
 903 %  with the specified cache view.
 904 %
 905 %  The format of the SetCacheViewVirtualPixelMethod method is:
 906 %
 907 %      MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view,
 908 %        const VirtualPixelMethod virtual_pixel_method)
 909 %
 910 %  A description of each parameter follows:
 911 %
 912 %    o cache_view: the cache view.
 913 %
 914 %    o virtual_pixel_method: the virtual pixel method.
 915 %
 916 */
 917 MagickExport MagickBooleanType SetCacheViewVirtualPixelMethod(
 918   CacheView *cache_view,const VirtualPixelMethod virtual_pixel_method)
 919 {
 920   assert(cache_view != (CacheView *) NULL);
 921   assert(cache_view->signature == MagickSignature);
 922   if (cache_view->debug != MagickFalse)
 923     (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
 924       cache_view->image->filename);
 925   cache_view->virtual_pixel_method=virtual_pixel_method;
 926   return(MagickTrue);
 927 }
 928 \f
 929 /*
 930 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 931 %                                                                             %
 932 %                                                                             %
 933 %                                                                             %
 934 %   S y n c C a c h e V i e w A u t h e n t i c P i x e l s                   %
 935 %                                                                             %
 936 %                                                                             %
 937 %                                                                             %
 938 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
 939 %
 940 %  SyncCacheViewAuthenticPixels() saves the cache view pixels to the in-memory
 941 %  or disk cache.  It returns MagickTrue if the pixel region is flushed,
 942 %  otherwise MagickFalse.
 943 %
 944 %  The format of the SyncCacheViewAuthenticPixels method is:
 945 %
 946 %      MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view,
 947 %        ExceptionInfo *exception)
 948 %
 949 %  A description of each parameter follows:
 950 %
 951 %    o cache_view: the cache view.
 952 %
 953 %    o exception: return any errors or warnings in this structure.
 954 %
 955 */
 956 MagickExport MagickBooleanType SyncCacheViewAuthenticPixels(
 957   CacheView *cache_view,ExceptionInfo *exception)
 958 {
 959   const int
 960     id = GetOpenMPThreadId();
 961
 962   MagickBooleanType
 963     status;
 964
 965   assert(cache_view != (CacheView *) NULL);
 966   assert(cache_view->signature == MagickSignature);
 967   assert(id < (int) cache_view->number_threads);
 968   status=SyncAuthenticPixelCacheNexus(cache_view->image,
 969     cache_view->nexus_info[id],exception);
 970   return(status);
 971 }