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It always succeeds but may return a warning or informational exception.</p> 60 61 <p>The format of the AcquireAuthenticCacheView method is:</p> 62 63 <pre class="text"> 64 CacheView *AcquireAuthenticCacheView(const Image *image, 65 ExceptionInfo *exception) 66 </pre> 67 68 <p>A description of each parameter follows:</p> 69 70 <dd> 71 </dd> 72 73 <dd> </dd> 74 <dl class="dl-horizontal"> 75 <dt>image</dt> 76 <dd>the image. </dd> 77 78 <dd> </dd> 79 <dt>exception</dt> 80 <dd>return any errors or warnings in this structure. </dd> 81 82 <dd> </dd> 83 </dl> 84 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="AcquireVirtualCacheView">AcquireVirtualCacheView</a></h2> 85 86 <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> 87 88 <p>The format of the AcquireVirtualCacheView method is:</p> 89 90 <pre class="text"> 91 CacheView *AcquireVirtualCacheView(const Image *image, 92 ExceptionInfo *exception) 93 </pre> 94 95 <p>A description of each parameter follows:</p> 96 97 <dd> 98 </dd> 99 100 <dd> </dd> 101 <dl class="dl-horizontal"> 102 <dt>image</dt> 103 <dd>the image. </dd> 104 105 <dd> </dd> 106 <dt>exception</dt> 107 <dd>return any errors or warnings in this structure. </dd> 108 109 <dd> </dd> 110 </dl> 111 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2> 112 113 <p>CloneCacheView() makes an exact copy of the specified cache view.</p> 114 115 <p>The format of the CloneCacheView method is:</p> 116 117 <pre class="text"> 118 CacheView *CloneCacheView(const CacheView *cache_view) 119 </pre> 120 121 <p>A description of each parameter follows:</p> 122 123 <dd> 124 </dd> 125 126 <dd> </dd> 127 <dl class="dl-horizontal"> 128 <dt>cache_view</dt> 129 <dd>the cache view. </dd> 130 131 <dd> </dd> 132 </dl> 133 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2> 134 135 <p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p> 136 137 <p>The format of the DestroyCacheView method is:</p> 138 139 <pre class="text"> 140 CacheView *DestroyCacheView(CacheView *cache_view) 141 </pre> 142 143 <p>A description of each parameter follows:</p> 144 145 <dd> 146 </dd> 147 148 <dd> </dd> 149 <dl class="dl-horizontal"> 150 <dt>cache_view</dt> 151 <dd>the cache view. </dd> 152 153 <dd> </dd> 154 </dl> 155 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2> 156 157 <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> 158 159 <p>The format of the GetCacheViewAuthenticPixels method is:</p> 160 161 <pre class="text"> 162 Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view, 163 const ssize_t x,const ssize_t y,const size_t columns, 164 const size_t rows,ExceptionInfo *exception) 165 </pre> 166 167 <p>A description of each parameter follows:</p> 168 169 <dd> 170 </dd> 171 172 <dd> </dd> 173 <dl class="dl-horizontal"> 174 <dt>cache_view</dt> 175 <dd>the cache view. </dd> 176 177 <dd> </dd> 178 <dt>x,y,columns,rows</dt> 179 <dd> These values define the perimeter of a region of pixels. </dd> 180 181 <dd> </dd> 182 <dt>exception</dt> 183 <dd>return any errors or warnings in this structure. </dd> 184 185 <dd> </dd> 186 </dl> 187 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a></h2> 188 189 <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> 190 191 <p>The format of the GetCacheViewAuthenticMetacontent() method is:</p> 192 193 <pre class="text"> 194 void *GetCacheViewAuthenticMetacontent(CacheView *cache_view) 195 </pre> 196 197 <p>A description of each parameter follows:</p> 198 199 <dd> 200 </dd> 201 202 <dd> </dd> 203 <dl class="dl-horizontal"> 204 <dt>cache_view</dt> 205 <dd>the cache view. </dd> 206 207 <dd> </dd> 208 </dl> 209 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2> 210 211 <p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels(). The pixels are authentic and therefore can be updated.</p> 212 213 <p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p> 214 215 <pre class="text"> 216 Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view) 217 </pre> 218 219 <p>A description of each parameter follows:</p> 220 221 <dd> 222 </dd> 223 224 <dd> </dd> 225 <dl class="dl-horizontal"> 226 <dt>cache_view</dt> 227 <dd>the cache view. </dd> 228 229 <dd> </dd> 230 </dl> 231 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2> 232 233 <p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p> 234 235 <p>The format of the GetCacheViewColorspace method is:</p> 236 237 <pre class="text"> 238 ColorspaceType GetCacheViewColorspace(const CacheView *cache_view) 239 </pre> 240 241 <p>A description of each parameter follows:</p> 242 243 <dd> 244 </dd> 245 246 <dd> </dd> 247 <dl class="dl-horizontal"> 248 <dt>cache_view</dt> 249 <dd>the cache view. </dd> 250 251 <dd> </dd> 252 </dl> 253 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewImage">GetCacheViewImage</a></h2> 254 255 <p>GetCacheViewImage() returns the image associated with the specified view.</p> 256 257 <p>The format of the GetCacheViewImage method is:</p> 258 259 <pre class="text"> 260 const Image *GetCacheViewImage(const CacheView *cache_view) 261 </pre> 262 263 <p>A description of each parameter follows:</p> 264 265 <dd> 266 </dd> 267 268 <dd> </dd> 269 <dl class="dl-horizontal"> 270 <dt>cache_view</dt> 271 <dd>the cache view. </dd> 272 273 <dd> </dd> 274 </dl> 275 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2> 276 277 <p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p> 278 279 <p>The format of the GetCacheViewStorageClass method is:</p> 280 281 <pre class="text"> 282 ClassType GetCacheViewStorageClass(const CacheView *cache_view) 283 </pre> 284 285 <p>A description of each parameter follows:</p> 286 287 <dd> 288 </dd> 289 290 <dd> </dd> 291 <dl class="dl-horizontal"> 292 <dt>cache_view</dt> 293 <dd>the cache view. </dd> 294 295 <dd> </dd> 296 </dl> 297 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a></h2> 298 299 <p>GetCacheViewVirtualMetacontent() returns the meta-content corresponding with the last call to GetCacheViewVirtualMetacontent(). The meta-content is virtual and therefore cannot be updated.</p> 300 301 <p>The format of the GetCacheViewVirtualMetacontent() method is:</p> 302 303 <pre class="text"> 304 const void *GetCacheViewVirtualMetacontent( 305 const CacheView *cache_view) 306 </pre> 307 308 <p>A description of each parameter follows:</p> 309 310 <dd> 311 </dd> 312 313 <dd> </dd> 314 <dl class="dl-horizontal"> 315 <dt>cache_view</dt> 316 <dd>the cache view. </dd> 317 318 <dd> </dd> 319 </dl> 320 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2> 321 322 <p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p> 323 324 <p>The format of the GetCacheViewVirtualPixelQueue() method is:</p> 325 326 <pre class="text"> 327 const Quantum *GetCacheViewVirtualPixelQueue( 328 const CacheView *cache_view) 329 </pre> 330 331 <p>A description of each parameter follows:</p> 332 333 <dd> 334 </dd> 335 336 <dd> </dd> 337 <dl class="dl-horizontal"> 338 <dt>cache_view</dt> 339 <dd>the cache view. </dd> 340 341 <dd> </dd> 342 </dl> 343 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2> 344 345 <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> 346 347 <p>The format of the GetCacheViewVirtualPixels method is:</p> 348 349 <pre class="text"> 350 const Quantum *GetCacheViewVirtualPixels( 351 const CacheView *cache_view,const ssize_t x,const ssize_t y, 352 const size_t columns,const size_t rows,ExceptionInfo *exception) 353 </pre> 354 355 <p>A description of each parameter follows:</p> 356 357 <dd> 358 </dd> 359 360 <dd> </dd> 361 <dl class="dl-horizontal"> 362 <dt>cache_view</dt> 363 <dd>the cache view. </dd> 364 365 <dd> </dd> 366 <dt>x,y,columns,rows</dt> 367 <dd> These values define the perimeter of a region of pixels. </dd> 368 369 <dd> </dd> 370 <dt>exception</dt> 371 <dd>return any errors or warnings in this structure. </dd> 372 373 <dd> </dd> 374 </dl> 375 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2> 376 377 <p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p> 378 379 <p>The format of the GetOneCacheViewAuthenticPixel method is:</p> 380 381 <pre class="text"> 382 MagickBooleaNType GetOneCacheViewAuthenticPixel( 383 const CacheView *cache_view,const ssize_t x,const ssize_t y, 384 Quantum *pixel,ExceptionInfo *exception) 385 </pre> 386 387 <p>A description of each parameter follows:</p> 388 389 <dd> 390 </dd> 391 392 <dd> </dd> 393 <dl class="dl-horizontal"> 394 <dt>cache_view</dt> 395 <dd>the cache view. </dd> 396 397 <dd> </dd> 398 <dt>x,y</dt> 399 <dd> These values define the offset of the pixel. </dd> 400 401 <dd> </dd> 402 <dt>pixel</dt> 403 <dd>return a pixel at the specified (x,y) location. </dd> 404 405 <dd> </dd> 406 <dt>exception</dt> 407 <dd>return any errors or warnings in this structure. </dd> 408 409 <dd> </dd> 410 </dl> 411 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2> 412 413 <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> 414 415 <p>The format of the GetOneCacheViewVirtualPixel method is:</p> 416 417 <pre class="text"> 418 MagickBooleanType GetOneCacheViewVirtualPixel( 419 const CacheView *cache_view,const ssize_t x,const ssize_t y, 420 Quantum *pixel,ExceptionInfo *exception) 421 </pre> 422 423 <p>A description of each parameter follows:</p> 424 425 <dd> 426 </dd> 427 428 <dd> </dd> 429 <dl class="dl-horizontal"> 430 <dt>cache_view</dt> 431 <dd>the cache view. </dd> 432 433 <dd> </dd> 434 <dt>x,y</dt> 435 <dd> These values define the offset of the pixel. </dd> 436 437 <dd> </dd> 438 <dt>pixel</dt> 439 <dd>return a pixel at the specified (x,y) location. </dd> 440 441 <dd> </dd> 442 <dt>exception</dt> 443 <dd>return any errors or warnings in this structure. </dd> 444 445 <dd> </dd> 446 </dl> 447 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a></h2> 448 449 <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> 450 451 <p>The format of the GetOneCacheViewVirtualPixelInfo method is:</p> 452 453 <pre class="text"> 454 MagickBooleanType GetOneCacheViewVirtualPixelInfo( 455 const CacheView *cache_view,const ssize_t x,const ssize_t y, 456 PixelInfo *pixel,ExceptionInfo *exception) 457 </pre> 458 459 <p>A description of each parameter follows:</p> 460 461 <dd> 462 </dd> 463 464 <dd> </dd> 465 <dl class="dl-horizontal"> 466 <dt>cache_view</dt> 467 <dd>the cache view. </dd> 468 469 <dd> </dd> 470 <dt>x,y</dt> 471 <dd> These values define the offset of the pixel. </dd> 472 473 <dd> </dd> 474 <dt>pixel</dt> 475 <dd>return a pixel at the specified (x,y) location. </dd> 476 477 <dd> </dd> 478 <dt>exception</dt> 479 <dd>return any errors or warnings in this structure. </dd> 480 481 <dd> </dd> 482 </dl> 483 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2> 484 485 <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> 486 487 <p>The format of the GetOneCacheViewVirtualPixel method is:</p> 488 489 <pre class="text"> 490 MagickBooleanType GetOneCacheViewVirtualMethodPixel( 491 const CacheView *cache_view, 492 const VirtualPixelMethod virtual_pixel_method,const ssize_t x, 493 const ssize_t y,Quantum *pixel,ExceptionInfo *exception) 494 </pre> 495 496 <p>A description of each parameter follows:</p> 497 498 <dd> 499 </dd> 500 501 <dd> </dd> 502 <dl class="dl-horizontal"> 503 <dt>cache_view</dt> 504 <dd>the cache view. </dd> 505 506 <dd> </dd> 507 <dt>virtual_pixel_method</dt> 508 <dd>the virtual pixel method. </dd> 509 510 <dd> </dd> 511 <dt>x,y</dt> 512 <dd> These values define the offset of the pixel. </dd> 513 514 <dd> </dd> 515 <dt>pixel</dt> 516 <dd>return a pixel at the specified (x,y) location. </dd> 517 518 <dd> </dd> 519 <dt>exception</dt> 520 <dd>return any errors or warnings in this structure. </dd> 521 522 <dd> </dd> 523 </dl> 524 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2> 525 526 <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> 527 528 <p>The format of the QueueCacheViewAuthenticPixels method is:</p> 529 530 <pre class="text"> 531 Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view, 532 const ssize_t x,const ssize_t y,const size_t columns, 533 const size_t rows,ExceptionInfo *exception) 534 </pre> 535 536 <p>A description of each parameter follows:</p> 537 538 <dd> 539 </dd> 540 541 <dd> </dd> 542 <dl class="dl-horizontal"> 543 <dt>cache_view</dt> 544 <dd>the cache view. </dd> 545 546 <dd> </dd> 547 <dt>x,y,columns,rows</dt> 548 <dd> These values define the perimeter of a region of pixels. </dd> 549 550 <dd> </dd> 551 <dt>exception</dt> 552 <dd>return any errors or warnings in this structure. </dd> 553 554 <dd> </dd> 555 </dl> 556 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2> 557 558 <p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p> 559 560 <p>The format of the SetCacheViewStorageClass method is:</p> 561 562 <pre class="text"> 563 MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view, 564 const ClassType storage_class,ExceptionInfo *exception) 565 </pre> 566 567 <p>A description of each parameter follows:</p> 568 569 <dd> 570 </dd> 571 572 <dd> </dd> 573 <dl class="dl-horizontal"> 574 <dt>cache_view</dt> 575 <dd>the cache view. </dd> 576 577 <dd> </dd> 578 <dt>storage_class</dt> 579 <dd>the image storage class: PseudoClass or DirectClass. </dd> 580 581 <dd> </dd> 582 <dt>exception</dt> 583 <dd>return any errors or warnings in this structure. </dd> 584 585 <dd> </dd> 586 </dl> 587 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2> 588 589 <p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p> 590 591 <p>The format of the SetCacheViewVirtualPixelMethod method is:</p> 592 593 <pre class="text"> 594 MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view, 595 const VirtualPixelMethod virtual_pixel_method) 596 </pre> 597 598 <p>A description of each parameter follows:</p> 599 600 <dd> 601 </dd> 602 603 <dd> </dd> 604 <dl class="dl-horizontal"> 605 <dt>cache_view</dt> 606 <dd>the cache view. </dd> 607 608 <dd> </dd> 609 <dt>virtual_pixel_method</dt> 610 <dd>the virtual pixel method. </dd> 611 612 <dd> </dd> 613 </dl> 614 <h2><a href="http://nextgen.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2> 615 616 <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> 617 618 <p>The format of the SyncCacheViewAuthenticPixels method is:</p> 619 620 <pre class="text"> 621 MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view, 622 ExceptionInfo *exception) 623 </pre> 624 625 <p>A description of each parameter follows:</p> 626 627 <dd> 628 </dd> 629 630 <dd> </dd> 631 <dl class="dl-horizontal"> 632 <dt>cache_view</dt> 633 <dd>the cache view. </dd> 634 635 <dd> </dd> 636 <dt>exception</dt> 637 <dd>return any errors or warnings in this structure. </dd> 638 639 <dd> </dd> 640 </dl> 641 </div> 642 <footer class="magick-footer"> 643 <p><a href="../script/support.php">Donate</a> 644 <a href="../script/sitemap.php">Sitemap</a> 645 <a href="../script/links.php">Related</a> 646 <a href="../script/architecture.php">Architecture</a> 647 </p> 648 <p><a href="cache-view.php#">Back to top</a> 649 <a href="http://pgp.mit.edu:11371/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> 650 <a href="../script/contact.php">Contact Us</a></p> 651 <p><small> 1999-2016 ImageMagick Studio LLC</small></p> 652 </footer> 653 </div><!-- /.container --> 654 655 <script src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.3/jquery.min.js"></script> 656 <script src="http://nextgen.imagemagick.org/js/magick.php"></script> 657 </div> 658 </body> 659 </html> 660
