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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"> 68CacheView *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"> 95CacheView *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"> 122CacheView *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"> 144CacheView *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"> 166Quantum *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"> 198void *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"> 220Quantum *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"> 242ColorspaceType 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"> 264const 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"> 286ClassType 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"> 308const 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"> 331const 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"> 354const 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"> 386MagickBooleaNType 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"> 422MagickBooleanType 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"> 458MagickBooleanType 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"> 494MagickBooleanType 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"> 535Quantum *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"> 567MagickBooleanType 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"> 598MagickBooleanType 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"> 625MagickBooleanType 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
