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It always succeeds but may return a warning or informational exception.</p> 64 65 <p>The format of the AcquireAuthenticCacheView method is:</p> 66 67 <pre class="text"> 68 CacheView *AcquireAuthenticCacheView(const Image *image, 69 ExceptionInfo *exception) 70 </pre> 71 72 <p>A description of each parameter follows:</p> 73 74 <dd> 75 </dd> 76 77 <dd> </dd> 78 <dl class="dl-horizontal"> 79 <dt>image</dt> 80 <dd>the image. </dd> 81 82 <dd> </dd> 83 <dt>exception</dt> 84 <dd>return any errors or warnings in this structure. </dd> 85 86 <dd> </dd> 87 </dl> 88 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="AcquireVirtualCacheView">AcquireVirtualCacheView</a></h2> 89 90 <p>AcquireVirtualCacheView() acquires a virtual view into the pixel cache, using the VirtualPixelMethod that is defined within the given image itself. It always succeeds but may return a warning or informational exception.</p> 91 92 <p>The format of the AcquireVirtualCacheView method is:</p> 93 94 <pre class="text"> 95 CacheView *AcquireVirtualCacheView(const Image *image, 96 ExceptionInfo *exception) 97 </pre> 98 99 <p>A description of each parameter follows:</p> 100 101 <dd> 102 </dd> 103 104 <dd> </dd> 105 <dl class="dl-horizontal"> 106 <dt>image</dt> 107 <dd>the image. </dd> 108 109 <dd> </dd> 110 <dt>exception</dt> 111 <dd>return any errors or warnings in this structure. </dd> 112 113 <dd> </dd> 114 </dl> 115 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2> 116 117 <p>CloneCacheView() makes an exact copy of the specified cache view.</p> 118 119 <p>The format of the CloneCacheView method is:</p> 120 121 <pre class="text"> 122 CacheView *CloneCacheView(const CacheView *cache_view) 123 </pre> 124 125 <p>A description of each parameter follows:</p> 126 127 <dd> 128 </dd> 129 130 <dd> </dd> 131 <dl class="dl-horizontal"> 132 <dt>cache_view</dt> 133 <dd>the cache view. </dd> 134 135 <dd> </dd> 136 </dl> 137 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2> 138 139 <p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p> 140 141 <p>The format of the DestroyCacheView method is:</p> 142 143 <pre class="text"> 144 CacheView *DestroyCacheView(CacheView *cache_view) 145 </pre> 146 147 <p>A description of each parameter follows:</p> 148 149 <dd> 150 </dd> 151 152 <dd> </dd> 153 <dl class="dl-horizontal"> 154 <dt>cache_view</dt> 155 <dd>the cache view. </dd> 156 157 <dd> </dd> 158 </dl> 159 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2> 160 161 <p>GetCacheViewAuthenticPixels() gets pixels from the in-memory or disk pixel cache as defined by the geometry parameters. A pointer to the pixels is returned if the pixels are transferred, otherwise a NULL is returned.</p> 162 163 <p>The format of the GetCacheViewAuthenticPixels method is:</p> 164 165 <pre class="text"> 166 Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view, 167 const ssize_t x,const ssize_t y,const size_t columns, 168 const size_t rows,ExceptionInfo *exception) 169 </pre> 170 171 <p>A description of each parameter follows:</p> 172 173 <dd> 174 </dd> 175 176 <dd> </dd> 177 <dl class="dl-horizontal"> 178 <dt>cache_view</dt> 179 <dd>the cache view. </dd> 180 181 <dd> </dd> 182 <dt>x,y,columns,rows</dt> 183 <dd> These values define the perimeter of a region of pixels. </dd> 184 185 <dd> </dd> 186 <dt>exception</dt> 187 <dd>return any errors or warnings in this structure. </dd> 188 189 <dd> </dd> 190 </dl> 191 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a></h2> 192 193 <p>GetCacheViewAuthenticMetacontent() returns the meta-content corresponding with the last call to SetCacheViewIndexes() or GetCacheViewAuthenticMetacontent(). The meta-content are authentic and can be updated.</p> 194 195 <p>The format of the GetCacheViewAuthenticMetacontent() method is:</p> 196 197 <pre class="text"> 198 void *GetCacheViewAuthenticMetacontent(CacheView *cache_view) 199 </pre> 200 201 <p>A description of each parameter follows:</p> 202 203 <dd> 204 </dd> 205 206 <dd> </dd> 207 <dl class="dl-horizontal"> 208 <dt>cache_view</dt> 209 <dd>the cache view. </dd> 210 211 <dd> </dd> 212 </dl> 213 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2> 214 215 <p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels(). The pixels are authentic and therefore can be updated.</p> 216 217 <p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p> 218 219 <pre class="text"> 220 Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view) 221 </pre> 222 223 <p>A description of each parameter follows:</p> 224 225 <dd> 226 </dd> 227 228 <dd> </dd> 229 <dl class="dl-horizontal"> 230 <dt>cache_view</dt> 231 <dd>the cache view. </dd> 232 233 <dd> </dd> 234 </dl> 235 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2> 236 237 <p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p> 238 239 <p>The format of the GetCacheViewColorspace method is:</p> 240 241 <pre class="text"> 242 ColorspaceType GetCacheViewColorspace(const CacheView *cache_view) 243 </pre> 244 245 <p>A description of each parameter follows:</p> 246 247 <dd> 248 </dd> 249 250 <dd> </dd> 251 <dl class="dl-horizontal"> 252 <dt>cache_view</dt> 253 <dd>the cache view. </dd> 254 255 <dd> </dd> 256 </dl> 257 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewImage">GetCacheViewImage</a></h2> 258 259 <p>GetCacheViewImage() returns the image associated with the specified view.</p> 260 261 <p>The format of the GetCacheViewImage method is:</p> 262 263 <pre class="text"> 264 const Image *GetCacheViewImage(const CacheView *cache_view) 265 </pre> 266 267 <p>A description of each parameter follows:</p> 268 269 <dd> 270 </dd> 271 272 <dd> </dd> 273 <dl class="dl-horizontal"> 274 <dt>cache_view</dt> 275 <dd>the cache view. </dd> 276 277 <dd> </dd> 278 </dl> 279 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2> 280 281 <p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p> 282 283 <p>The format of the GetCacheViewStorageClass method is:</p> 284 285 <pre class="text"> 286 ClassType GetCacheViewStorageClass(const CacheView *cache_view) 287 </pre> 288 289 <p>A description of each parameter follows:</p> 290 291 <dd> 292 </dd> 293 294 <dd> </dd> 295 <dl class="dl-horizontal"> 296 <dt>cache_view</dt> 297 <dd>the cache view. </dd> 298 299 <dd> </dd> 300 </dl> 301 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a></h2> 302 303 <p>GetCacheViewVirtualMetacontent() returns the meta-content corresponding with the last call to GetCacheViewVirtualMetacontent(). The meta-content is virtual and therefore cannot be updated.</p> 304 305 <p>The format of the GetCacheViewVirtualMetacontent() method is:</p> 306 307 <pre class="text"> 308 const void *GetCacheViewVirtualMetacontent( 309 const CacheView *cache_view) 310 </pre> 311 312 <p>A description of each parameter follows:</p> 313 314 <dd> 315 </dd> 316 317 <dd> </dd> 318 <dl class="dl-horizontal"> 319 <dt>cache_view</dt> 320 <dd>the cache view. </dd> 321 322 <dd> </dd> 323 </dl> 324 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2> 325 326 <p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p> 327 328 <p>The format of the GetCacheViewVirtualPixelQueue() method is:</p> 329 330 <pre class="text"> 331 const Quantum *GetCacheViewVirtualPixelQueue( 332 const CacheView *cache_view) 333 </pre> 334 335 <p>A description of each parameter follows:</p> 336 337 <dd> 338 </dd> 339 340 <dd> </dd> 341 <dl class="dl-horizontal"> 342 <dt>cache_view</dt> 343 <dd>the cache view. </dd> 344 345 <dd> </dd> 346 </dl> 347 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2> 348 349 <p>GetCacheViewVirtualPixels() gets virtual pixels from the in-memory or disk pixel cache as defined by the geometry parameters. A pointer to the pixels is returned if the pixels are transferred, otherwise a NULL is returned.</p> 350 351 <p>The format of the GetCacheViewVirtualPixels method is:</p> 352 353 <pre class="text"> 354 const Quantum *GetCacheViewVirtualPixels( 355 const CacheView *cache_view,const ssize_t x,const ssize_t y, 356 const size_t columns,const size_t rows,ExceptionInfo *exception) 357 </pre> 358 359 <p>A description of each parameter follows:</p> 360 361 <dd> 362 </dd> 363 364 <dd> </dd> 365 <dl class="dl-horizontal"> 366 <dt>cache_view</dt> 367 <dd>the cache view. </dd> 368 369 <dd> </dd> 370 <dt>x,y,columns,rows</dt> 371 <dd> These values define the perimeter of a region of pixels. </dd> 372 373 <dd> </dd> 374 <dt>exception</dt> 375 <dd>return any errors or warnings in this structure. </dd> 376 377 <dd> </dd> 378 </dl> 379 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2> 380 381 <p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p> 382 383 <p>The format of the GetOneCacheViewAuthenticPixel method is:</p> 384 385 <pre class="text"> 386 MagickBooleaNType GetOneCacheViewAuthenticPixel( 387 const CacheView *cache_view,const ssize_t x,const ssize_t y, 388 Quantum *pixel,ExceptionInfo *exception) 389 </pre> 390 391 <p>A description of each parameter follows:</p> 392 393 <dd> 394 </dd> 395 396 <dd> </dd> 397 <dl class="dl-horizontal"> 398 <dt>cache_view</dt> 399 <dd>the cache view. </dd> 400 401 <dd> </dd> 402 <dt>x,y</dt> 403 <dd> These values define the offset of the pixel. </dd> 404 405 <dd> </dd> 406 <dt>pixel</dt> 407 <dd>return a pixel at the specified (x,y) location. </dd> 408 409 <dd> </dd> 410 <dt>exception</dt> 411 <dd>return any errors or warnings in this structure. </dd> 412 413 <dd> </dd> 414 </dl> 415 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2> 416 417 <p>GetOneCacheViewVirtualPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs. If you plan to modify the pixel, use GetOneCacheViewAuthenticPixel() instead.</p> 418 419 <p>The format of the GetOneCacheViewVirtualPixel method is:</p> 420 421 <pre class="text"> 422 MagickBooleanType GetOneCacheViewVirtualPixel( 423 const CacheView *cache_view,const ssize_t x,const ssize_t y, 424 Quantum *pixel,ExceptionInfo *exception) 425 </pre> 426 427 <p>A description of each parameter follows:</p> 428 429 <dd> 430 </dd> 431 432 <dd> </dd> 433 <dl class="dl-horizontal"> 434 <dt>cache_view</dt> 435 <dd>the cache view. </dd> 436 437 <dd> </dd> 438 <dt>x,y</dt> 439 <dd> These values define the offset of the pixel. </dd> 440 441 <dd> </dd> 442 <dt>pixel</dt> 443 <dd>return a pixel at the specified (x,y) location. </dd> 444 445 <dd> </dd> 446 <dt>exception</dt> 447 <dd>return any errors or warnings in this structure. </dd> 448 449 <dd> </dd> 450 </dl> 451 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a></h2> 452 453 <p>GetOneCacheViewVirtualPixelInfo() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs. If you plan to modify the pixel, use GetOneCacheViewAuthenticPixel() instead.</p> 454 455 <p>The format of the GetOneCacheViewVirtualPixelInfo method is:</p> 456 457 <pre class="text"> 458 MagickBooleanType GetOneCacheViewVirtualPixelInfo( 459 const CacheView *cache_view,const ssize_t x,const ssize_t y, 460 PixelInfo *pixel,ExceptionInfo *exception) 461 </pre> 462 463 <p>A description of each parameter follows:</p> 464 465 <dd> 466 </dd> 467 468 <dd> </dd> 469 <dl class="dl-horizontal"> 470 <dt>cache_view</dt> 471 <dd>the cache view. </dd> 472 473 <dd> </dd> 474 <dt>x,y</dt> 475 <dd> These values define the offset of the pixel. </dd> 476 477 <dd> </dd> 478 <dt>pixel</dt> 479 <dd>return a pixel at the specified (x,y) location. </dd> 480 481 <dd> </dd> 482 <dt>exception</dt> 483 <dd>return any errors or warnings in this structure. </dd> 484 485 <dd> </dd> 486 </dl> 487 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2> 488 489 <p>GetOneCacheViewVirtualMethodPixel() returns a single virtual pixel at the specified (x,y) location. The image background color is returned if an error occurs. If you plan to modify the pixel, use GetOneCacheViewAuthenticPixel() instead.</p> 490 491 <p>The format of the GetOneCacheViewVirtualPixel method is:</p> 492 493 <pre class="text"> 494 MagickBooleanType GetOneCacheViewVirtualMethodPixel( 495 const CacheView *cache_view, 496 const VirtualPixelMethod virtual_pixel_method,const ssize_t x, 497 const ssize_t y,Quantum *pixel,ExceptionInfo *exception) 498 </pre> 499 500 <p>A description of each parameter follows:</p> 501 502 <dd> 503 </dd> 504 505 <dd> </dd> 506 <dl class="dl-horizontal"> 507 <dt>cache_view</dt> 508 <dd>the cache view. </dd> 509 510 <dd> </dd> 511 <dt>virtual_pixel_method</dt> 512 <dd>the virtual pixel method. </dd> 513 514 <dd> </dd> 515 <dt>x,y</dt> 516 <dd> These values define the offset of the pixel. </dd> 517 518 <dd> </dd> 519 <dt>pixel</dt> 520 <dd>return a pixel at the specified (x,y) location. </dd> 521 522 <dd> </dd> 523 <dt>exception</dt> 524 <dd>return any errors or warnings in this structure. </dd> 525 526 <dd> </dd> 527 </dl> 528 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2> 529 530 <p>QueueCacheViewAuthenticPixels() queues authentic pixels from the in-memory or disk pixel cache as defined by the geometry parameters. A pointer to the pixels is returned if the pixels are transferred, otherwise a NULL is returned.</p> 531 532 <p>The format of the QueueCacheViewAuthenticPixels method is:</p> 533 534 <pre class="text"> 535 Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view, 536 const ssize_t x,const ssize_t y,const size_t columns, 537 const size_t rows,ExceptionInfo *exception) 538 </pre> 539 540 <p>A description of each parameter follows:</p> 541 542 <dd> 543 </dd> 544 545 <dd> </dd> 546 <dl class="dl-horizontal"> 547 <dt>cache_view</dt> 548 <dd>the cache view. </dd> 549 550 <dd> </dd> 551 <dt>x,y,columns,rows</dt> 552 <dd> These values define the perimeter of a region of pixels. </dd> 553 554 <dd> </dd> 555 <dt>exception</dt> 556 <dd>return any errors or warnings in this structure. </dd> 557 558 <dd> </dd> 559 </dl> 560 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2> 561 562 <p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p> 563 564 <p>The format of the SetCacheViewStorageClass method is:</p> 565 566 <pre class="text"> 567 MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view, 568 const ClassType storage_class,ExceptionInfo *exception) 569 </pre> 570 571 <p>A description of each parameter follows:</p> 572 573 <dd> 574 </dd> 575 576 <dd> </dd> 577 <dl class="dl-horizontal"> 578 <dt>cache_view</dt> 579 <dd>the cache view. </dd> 580 581 <dd> </dd> 582 <dt>storage_class</dt> 583 <dd>the image storage class: PseudoClass or DirectClass. </dd> 584 585 <dd> </dd> 586 <dt>exception</dt> 587 <dd>return any errors or warnings in this structure. </dd> 588 589 <dd> </dd> 590 </dl> 591 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2> 592 593 <p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p> 594 595 <p>The format of the SetCacheViewVirtualPixelMethod method is:</p> 596 597 <pre class="text"> 598 MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view, 599 const VirtualPixelMethod virtual_pixel_method) 600 </pre> 601 602 <p>A description of each parameter follows:</p> 603 604 <dd> 605 </dd> 606 607 <dd> </dd> 608 <dl class="dl-horizontal"> 609 <dt>cache_view</dt> 610 <dd>the cache view. </dd> 611 612 <dd> </dd> 613 <dt>virtual_pixel_method</dt> 614 <dd>the virtual pixel method. </dd> 615 616 <dd> </dd> 617 </dl> 618 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2> 619 620 <p>SyncCacheViewAuthenticPixels() saves the cache view pixels to the in-memory or disk cache. It returns MagickTrue if the pixel region is flushed, otherwise MagickFalse.</p> 621 622 <p>The format of the SyncCacheViewAuthenticPixels method is:</p> 623 624 <pre class="text"> 625 MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view, 626 ExceptionInfo *exception) 627 </pre> 628 629 <p>A description of each parameter follows:</p> 630 631 <dd> 632 </dd> 633 634 <dd> </dd> 635 <dl class="dl-horizontal"> 636 <dt>cache_view</dt> 637 <dd>the cache view. </dd> 638 639 <dd> </dd> 640 <dt>exception</dt> 641 <dd>return any errors or warnings in this structure. </dd> 642 643 <dd> </dd> 644 </dl> 645 </div> 646 <footer class="magick-footer"> 647 <p><a href="../support.html">Donate</a> 648 <a href="../sitemap.html">Sitemap</a> 649 <a href="../links.html">Related</a> 650 <a href="../architecture.html">Architecture</a> 651 </p> 652 <p><a href="cache-view.html#">Back to top</a> 653 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 654 <a href="http://www.imagemagick.org/script/contact.php">Contact Us</a></p> 655 <p><small> 1999-2016 ImageMagick Studio LLC</small></p> 656 </footer> 657 </div><!-- /.container --> 658 659 <script src="https://localhost/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 660 <script src="../js/magick.html"></script> 661 </div> 662 </body> 663 </html> 664
