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77 </script> 78 79 </div> 80 </header> 81 <main class="container"> 82 <div class="magick-template"> 83<div class="magick-header"> 84<p class="text-center"><a href="cache-view.html#AcquireAuthenticCacheView">AcquireAuthenticCacheView</a> • <a href="cache-view.html#AcquireVirtualCacheView">AcquireVirtualCacheView</a> • <a href="cache-view.html#CloneCacheView">CloneCacheView</a> • <a href="cache-view.html#DestroyCacheView">DestroyCacheView</a> • <a href="cache-view.html#GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a> • <a href="cache-view.html#GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a> • <a href="cache-view.html#GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a> • <a href="cache-view.html#GetCacheViewColorspace">GetCacheViewColorspace</a> • <a href="cache-view.html#GetCacheViewImage">GetCacheViewImage</a> • <a href="cache-view.html#GetCacheViewStorageClass">GetCacheViewStorageClass</a> • <a href="cache-view.html#GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a> • <a href="cache-view.html#GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a> • <a href="cache-view.html#GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a> • <a href="cache-view.html#GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a> • <a href="cache-view.html#GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a> • <a href="cache-view.html#GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a> • <a href="cache-view.html#GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a> • <a href="cache-view.html#QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a> • <a href="cache-view.html#SetCacheViewStorageClass">SetCacheViewStorageClass</a> • <a href="cache-view.html#SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a> • <a href="cache-view.html#SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></p> 85 86<h2><a href="../../api/MagickCore/cache-view_8c.html" id="AcquireAuthenticCacheView">AcquireAuthenticCacheView</a></h2> 87 88<p>AcquireAuthenticCacheView() acquires an authentic view into the pixel cache. It always succeeds but may return a warning or informational exception.</p> 89 90<p>The format of the AcquireAuthenticCacheView method is:</p> 91 92<pre class="text"> 93CacheView *AcquireAuthenticCacheView(const Image *image, 94 ExceptionInfo *exception) 95</pre> 96 97<p>A description of each parameter follows:</p> 98 99<dd> 100</dd> 101 102<dd> </dd> 103<dl class="dl-horizontal"> 104<dt>image</dt> 105<dd>the image. </dd> 106 107<dd> </dd> 108<dt>exception</dt> 109<dd>return any errors or warnings in this structure. </dd> 110 111<dd> </dd> 112</dl> 113<h2><a href="../../api/MagickCore/cache-view_8c.html" id="AcquireVirtualCacheView">AcquireVirtualCacheView</a></h2> 114 115<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> 116 117<p>The format of the AcquireVirtualCacheView method is:</p> 118 119<pre class="text"> 120CacheView *AcquireVirtualCacheView(const Image *image, 121 ExceptionInfo *exception) 122</pre> 123 124<p>A description of each parameter follows:</p> 125 126<dd> 127</dd> 128 129<dd> </dd> 130<dl class="dl-horizontal"> 131<dt>image</dt> 132<dd>the image. </dd> 133 134<dd> </dd> 135<dt>exception</dt> 136<dd>return any errors or warnings in this structure. </dd> 137 138<dd> </dd> 139</dl> 140<h2><a href="../../api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2> 141 142<p>CloneCacheView() makes an exact copy of the specified cache view.</p> 143 144<p>The format of the CloneCacheView method is:</p> 145 146<pre class="text"> 147CacheView *CloneCacheView(const CacheView *cache_view) 148</pre> 149 150<p>A description of each parameter follows:</p> 151 152<dd> 153</dd> 154 155<dd> </dd> 156<dl class="dl-horizontal"> 157<dt>cache_view</dt> 158<dd>the cache view. </dd> 159 160<dd> </dd> 161</dl> 162<h2><a href="../../api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2> 163 164<p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p> 165 166<p>The format of the DestroyCacheView method is:</p> 167 168<pre class="text"> 169CacheView *DestroyCacheView(CacheView *cache_view) 170</pre> 171 172<p>A description of each parameter follows:</p> 173 174<dd> 175</dd> 176 177<dd> </dd> 178<dl class="dl-horizontal"> 179<dt>cache_view</dt> 180<dd>the cache view. </dd> 181 182<dd> </dd> 183</dl> 184<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2> 185 186<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> 187 188<p>The format of the GetCacheViewAuthenticPixels method is:</p> 189 190<pre class="text"> 191Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view, 192 const ssize_t x,const ssize_t y,const size_t columns, 193 const size_t rows,ExceptionInfo *exception) 194</pre> 195 196<p>A description of each parameter follows:</p> 197 198<dd> 199</dd> 200 201<dd> </dd> 202<dl class="dl-horizontal"> 203<dt>cache_view</dt> 204<dd>the cache view. </dd> 205 206<dd> </dd> 207<dt>x,y,columns,rows</dt> 208<dd> These values define the perimeter of a region of pixels. </dd> 209 210<dd> </dd> 211<dt>exception</dt> 212<dd>return any errors or warnings in this structure. </dd> 213 214<dd> </dd> 215</dl> 216<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a></h2> 217 218<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> 219 220<p>The format of the GetCacheViewAuthenticMetacontent() method is:</p> 221 222<pre class="text"> 223void *GetCacheViewAuthenticMetacontent(CacheView *cache_view) 224</pre> 225 226<p>A description of each parameter follows:</p> 227 228<dd> 229</dd> 230 231<dd> </dd> 232<dl class="dl-horizontal"> 233<dt>cache_view</dt> 234<dd>the cache view. </dd> 235 236<dd> </dd> 237</dl> 238<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2> 239 240<p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels(). The pixels are authentic and therefore can be updated.</p> 241 242<p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p> 243 244<pre class="text"> 245Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view) 246</pre> 247 248<p>A description of each parameter follows:</p> 249 250<dd> 251</dd> 252 253<dd> </dd> 254<dl class="dl-horizontal"> 255<dt>cache_view</dt> 256<dd>the cache view. </dd> 257 258<dd> </dd> 259</dl> 260<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2> 261 262<p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p> 263 264<p>The format of the GetCacheViewColorspace method is:</p> 265 266<pre class="text"> 267ColorspaceType GetCacheViewColorspace(const CacheView *cache_view) 268</pre> 269 270<p>A description of each parameter follows:</p> 271 272<dd> 273</dd> 274 275<dd> </dd> 276<dl class="dl-horizontal"> 277<dt>cache_view</dt> 278<dd>the cache view. </dd> 279 280<dd> </dd> 281</dl> 282<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewImage">GetCacheViewImage</a></h2> 283 284<p>GetCacheViewImage() returns the image associated with the specified view.</p> 285 286<p>The format of the GetCacheViewImage method is:</p> 287 288<pre class="text"> 289const Image *GetCacheViewImage(const CacheView *cache_view) 290</pre> 291 292<p>A description of each parameter follows:</p> 293 294<dd> 295</dd> 296 297<dd> </dd> 298<dl class="dl-horizontal"> 299<dt>cache_view</dt> 300<dd>the cache view. </dd> 301 302<dd> </dd> 303</dl> 304<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2> 305 306<p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p> 307 308<p>The format of the GetCacheViewStorageClass method is:</p> 309 310<pre class="text"> 311ClassType GetCacheViewStorageClass(const CacheView *cache_view) 312</pre> 313 314<p>A description of each parameter follows:</p> 315 316<dd> 317</dd> 318 319<dd> </dd> 320<dl class="dl-horizontal"> 321<dt>cache_view</dt> 322<dd>the cache view. </dd> 323 324<dd> </dd> 325</dl> 326<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a></h2> 327 328<p>GetCacheViewVirtualMetacontent() returns the meta-content corresponding with the last call to GetCacheViewVirtualMetacontent(). The meta-content is virtual and therefore cannot be updated.</p> 329 330<p>The format of the GetCacheViewVirtualMetacontent() method is:</p> 331 332<pre class="text"> 333const void *GetCacheViewVirtualMetacontent( 334 const CacheView *cache_view) 335</pre> 336 337<p>A description of each parameter follows:</p> 338 339<dd> 340</dd> 341 342<dd> </dd> 343<dl class="dl-horizontal"> 344<dt>cache_view</dt> 345<dd>the cache view. </dd> 346 347<dd> </dd> 348</dl> 349<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2> 350 351<p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p> 352 353<p>The format of the GetCacheViewVirtualPixelQueue() method is:</p> 354 355<pre class="text"> 356const Quantum *GetCacheViewVirtualPixelQueue( 357 const CacheView *cache_view) 358</pre> 359 360<p>A description of each parameter follows:</p> 361 362<dd> 363</dd> 364 365<dd> </dd> 366<dl class="dl-horizontal"> 367<dt>cache_view</dt> 368<dd>the cache view. </dd> 369 370<dd> </dd> 371</dl> 372<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2> 373 374<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> 375 376<p>The format of the GetCacheViewVirtualPixels method is:</p> 377 378<pre class="text"> 379const Quantum *GetCacheViewVirtualPixels( 380 const CacheView *cache_view,const ssize_t x,const ssize_t y, 381 const size_t columns,const size_t rows,ExceptionInfo *exception) 382</pre> 383 384<p>A description of each parameter follows:</p> 385 386<dd> 387</dd> 388 389<dd> </dd> 390<dl class="dl-horizontal"> 391<dt>cache_view</dt> 392<dd>the cache view. </dd> 393 394<dd> </dd> 395<dt>x,y,columns,rows</dt> 396<dd> These values define the perimeter of a region of pixels. </dd> 397 398<dd> </dd> 399<dt>exception</dt> 400<dd>return any errors or warnings in this structure. </dd> 401 402<dd> </dd> 403</dl> 404<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2> 405 406<p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p> 407 408<p>The format of the GetOneCacheViewAuthenticPixel method is:</p> 409 410<pre class="text"> 411MagickBooleaNType GetOneCacheViewAuthenticPixel( 412 const CacheView *cache_view,const ssize_t x,const ssize_t y, 413 Quantum *pixel,ExceptionInfo *exception) 414</pre> 415 416<p>A description of each parameter follows:</p> 417 418<dd> 419</dd> 420 421<dd> </dd> 422<dl class="dl-horizontal"> 423<dt>cache_view</dt> 424<dd>the cache view. </dd> 425 426<dd> </dd> 427<dt>x,y</dt> 428<dd> These values define the offset of the pixel. </dd> 429 430<dd> </dd> 431<dt>pixel</dt> 432<dd>return a pixel at the specified (x,y) location. </dd> 433 434<dd> </dd> 435<dt>exception</dt> 436<dd>return any errors or warnings in this structure. </dd> 437 438<dd> </dd> 439</dl> 440<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2> 441 442<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> 443 444<p>The format of the GetOneCacheViewVirtualPixel method is:</p> 445 446<pre class="text"> 447MagickBooleanType GetOneCacheViewVirtualPixel( 448 const CacheView *cache_view,const ssize_t x,const ssize_t y, 449 Quantum *pixel,ExceptionInfo *exception) 450</pre> 451 452<p>A description of each parameter follows:</p> 453 454<dd> 455</dd> 456 457<dd> </dd> 458<dl class="dl-horizontal"> 459<dt>cache_view</dt> 460<dd>the cache view. </dd> 461 462<dd> </dd> 463<dt>x,y</dt> 464<dd> These values define the offset of the pixel. </dd> 465 466<dd> </dd> 467<dt>pixel</dt> 468<dd>return a pixel at the specified (x,y) location. </dd> 469 470<dd> </dd> 471<dt>exception</dt> 472<dd>return any errors or warnings in this structure. </dd> 473 474<dd> </dd> 475</dl> 476<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a></h2> 477 478<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> 479 480<p>The format of the GetOneCacheViewVirtualPixelInfo method is:</p> 481 482<pre class="text"> 483MagickBooleanType GetOneCacheViewVirtualPixelInfo( 484 const CacheView *cache_view,const ssize_t x,const ssize_t y, 485 PixelInfo *pixel,ExceptionInfo *exception) 486</pre> 487 488<p>A description of each parameter follows:</p> 489 490<dd> 491</dd> 492 493<dd> </dd> 494<dl class="dl-horizontal"> 495<dt>cache_view</dt> 496<dd>the cache view. </dd> 497 498<dd> </dd> 499<dt>x,y</dt> 500<dd> These values define the offset of the pixel. </dd> 501 502<dd> </dd> 503<dt>pixel</dt> 504<dd>return a pixel at the specified (x,y) location. </dd> 505 506<dd> </dd> 507<dt>exception</dt> 508<dd>return any errors or warnings in this structure. </dd> 509 510<dd> </dd> 511</dl> 512<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2> 513 514<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> 515 516<p>The format of the GetOneCacheViewVirtualPixel method is:</p> 517 518<pre class="text"> 519MagickBooleanType GetOneCacheViewVirtualMethodPixel( 520 const CacheView *cache_view, 521 const VirtualPixelMethod virtual_pixel_method,const ssize_t x, 522 const ssize_t y,Quantum *pixel,ExceptionInfo *exception) 523</pre> 524 525<p>A description of each parameter follows:</p> 526 527<dd> 528</dd> 529 530<dd> </dd> 531<dl class="dl-horizontal"> 532<dt>cache_view</dt> 533<dd>the cache view. </dd> 534 535<dd> </dd> 536<dt>virtual_pixel_method</dt> 537<dd>the virtual pixel method. </dd> 538 539<dd> </dd> 540<dt>x,y</dt> 541<dd> These values define the offset of the pixel. </dd> 542 543<dd> </dd> 544<dt>pixel</dt> 545<dd>return a pixel at the specified (x,y) location. </dd> 546 547<dd> </dd> 548<dt>exception</dt> 549<dd>return any errors or warnings in this structure. </dd> 550 551<dd> </dd> 552</dl> 553<h2><a href="../../api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2> 554 555<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> 556 557<p>The format of the QueueCacheViewAuthenticPixels method is:</p> 558 559<pre class="text"> 560Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view, 561 const ssize_t x,const ssize_t y,const size_t columns, 562 const size_t rows,ExceptionInfo *exception) 563</pre> 564 565<p>A description of each parameter follows:</p> 566 567<dd> 568</dd> 569 570<dd> </dd> 571<dl class="dl-horizontal"> 572<dt>cache_view</dt> 573<dd>the cache view. </dd> 574 575<dd> </dd> 576<dt>x,y,columns,rows</dt> 577<dd> These values define the perimeter of a region of pixels. </dd> 578 579<dd> </dd> 580<dt>exception</dt> 581<dd>return any errors or warnings in this structure. </dd> 582 583<dd> </dd> 584</dl> 585<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2> 586 587<p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p> 588 589<p>The format of the SetCacheViewStorageClass method is:</p> 590 591<pre class="text"> 592MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view, 593 const ClassType storage_class,ExceptionInfo *exception) 594</pre> 595 596<p>A description of each parameter follows:</p> 597 598<dd> 599</dd> 600 601<dd> </dd> 602<dl class="dl-horizontal"> 603<dt>cache_view</dt> 604<dd>the cache view. </dd> 605 606<dd> </dd> 607<dt>storage_class</dt> 608<dd>the image storage class: PseudoClass or DirectClass. </dd> 609 610<dd> </dd> 611<dt>exception</dt> 612<dd>return any errors or warnings in this structure. </dd> 613 614<dd> </dd> 615</dl> 616<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2> 617 618<p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p> 619 620<p>The format of the SetCacheViewVirtualPixelMethod method is:</p> 621 622<pre class="text"> 623MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view, 624 const VirtualPixelMethod virtual_pixel_method) 625</pre> 626 627<p>A description of each parameter follows:</p> 628 629<dd> 630</dd> 631 632<dd> </dd> 633<dl class="dl-horizontal"> 634<dt>cache_view</dt> 635<dd>the cache view. </dd> 636 637<dd> </dd> 638<dt>virtual_pixel_method</dt> 639<dd>the virtual pixel method. </dd> 640 641<dd> </dd> 642</dl> 643<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2> 644 645<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> 646 647<p>The format of the SyncCacheViewAuthenticPixels method is:</p> 648 649<pre class="text"> 650MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view, 651 ExceptionInfo *exception) 652</pre> 653 654<p>A description of each parameter follows:</p> 655 656<dd> 657</dd> 658 659<dd> </dd> 660<dl class="dl-horizontal"> 661<dt>cache_view</dt> 662<dd>the cache view. </dd> 663 664<dd> </dd> 665<dt>exception</dt> 666<dd>return any errors or warnings in this structure. </dd> 667 668<dd> </dd> 669</dl> 670</div> 671 </div> 672 </main><!-- /.container --> 673 <footer class="magick-footer"> 674 <p><a href="../../www/security-policy.html">Security</a> • 675 <a href="../../www/architecture.html">Architecture</a> • 676 <a href="../../www/links.html">Related</a> • 677 <a href="../../www/sitemap.html">Sitemap</a> 678 679 <a href="cache-view.html#"><img class="d-inline" id="wand" alt="And Now a Touch of Magick" width="16" height="16" src="../../images/wand.ico"/></a> 680 681 <a href="http://pgp.mit.edu/pks/lookup?op=get&search=0x89AB63D48277377A">Public Key</a> • 682 <a href="../../www/support.html">Donate</a> • 683 <a href="../../www/contact.html">Contact Us</a> 684 <br/> 685 <small>© 1999-2019 ImageMagick Studio LLC</small></p> 686 </footer> 687 688 <!-- Javascript assets --> 689 <script src="../assets/magick.js" crossorigin="anonymous"></script> 690 <script>window.jQuery || document.write('<script src="https://localhost/ajax/libs/jquery/3.3.1/jquery.min.js"><\/script>')</script> 691</body> 692</html> 693<!-- Magick Cache 1st January 2019 10:46 -->
