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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"> 64CacheView *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"> 91CacheView *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"> 118CacheView *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"> 140CacheView *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"> 162Quantum *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"> 194void *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"> 216Quantum *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"> 238ColorspaceType 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"> 260const 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"> 282ClassType 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"> 304const 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"> 327const 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"> 350const 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"> 382MagickBooleaNType 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"> 418MagickBooleanType 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"> 454MagickBooleanType 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"> 490MagickBooleanType 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"> 531Quantum *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"> 563MagickBooleanType 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"> 594MagickBooleanType 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"> 621MagickBooleanType 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
