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147
148<p class="navigation-index">[<a href="#AcquireCacheView">AcquireCacheView</a> &bull; <a href="#CloneCacheView">CloneCacheView</a> &bull; <a href="#DestroyCacheView">DestroyCacheView</a> &bull; <a href="#GetCacheViewColorspace">GetCacheViewColorspace</a> &bull; <a href="#GetCacheViewException">GetCacheViewException</a> &bull; <a href="#GetCacheViewStorageClass">GetCacheViewStorageClass</a> &bull; <a href="#GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a> &bull; <a href="#GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a> &bull; <a href="#GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a> &bull; <a href="#GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a> &bull; <a href="#GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a> &bull; <a href="#GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a> &bull; <a href="#GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a> &bull; <a href="#GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a> &bull; <a href="#GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a> &bull; <a href="#QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a> &bull; <a href="#SetCacheViewStorageClass">SetCacheViewStorageClass</a> &bull; <a href="#SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a> &bull; <a href="#SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a>]</p>
149
150<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
151_8c.html" target="source" name="AcquireCacheView">AcquireCacheView</a></h2>
152<div class="doc-section">
153
154<p>AcquireCacheView() acquires a view into the pixel cache, using the VirtualPixelMethod that is defined within the given image itself.</p></ol>
155
156<p>The format of the AcquireCacheView method is:</p>
157
158<pre class="code">
159 CacheView *AcquireCacheView(const Image *image)
160</pre>
161
162<p>A description of each parameter follows:</p></ol>
163
164<h5>image</h5>
165<ol><p>the image.</p></ol>
166
167 </div>
168<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
169_8c.html" target="source" name="CloneCacheView">CloneCacheView</a></h2>
170<div class="doc-section">
171
172<p>CloneCacheView() makes an exact copy of the specified cache view.</p></ol>
173
174<p>The format of the CloneCacheView method is:</p>
175
176<pre class="code">
177 CacheView *CloneCacheView(const CacheView *cache_view)
178</pre>
179
180<p>A description of each parameter follows:</p></ol>
181
182<h5>cache_view</h5>
183<ol><p>the cache view.</p></ol>
184
185 </div>
186<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
187_8c.html" target="source" name="DestroyCacheView">DestroyCacheView</a></h2>
188<div class="doc-section">
189
190<p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p></ol>
191
192<p>The format of the DestroyCacheView method is:</p>
193
194<pre class="code">
195 CacheView *DestroyCacheView(CacheView *cache_view)
196</pre>
197
198<p>A description of each parameter follows:</p></ol>
199
200<h5>cache_view</h5>
201<ol><p>the cache view.</p></ol>
202
203 </div>
204<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
205_8c.html" target="source" name="GetCacheViewColorspace">GetCacheViewColorspace</a></h2>
206<div class="doc-section">
207
208<p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p></ol>
209
210<p>The format of the GetCacheViewColorspace method is:</p>
211
212<pre class="code">
213 ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
214</pre>
215
216<p>A description of each parameter follows:</p></ol>
217
218<h5>cache_view</h5>
219<ol><p>the cache view.</p></ol>
220
221 </div>
222<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
223_8c.html" target="source" name="GetCacheViewException">GetCacheViewException</a></h2>
224<div class="doc-section">
225
226<p>GetCacheViewException() returns the image exception associated with the specified view.</p></ol>
227
228<p>The format of the GetCacheViewException method is:</p>
229
230<pre class="code">
231 ExceptionInfo GetCacheViewException(const CacheView *cache_view)
232</pre>
233
234<p>A description of each parameter follows:</p></ol>
235
236<h5>cache_view</h5>
237<ol><p>the cache view.</p></ol>
238
239 </div>
240<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
241_8c.html" target="source" name="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2>
242<div class="doc-section">
243
244<p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p></ol>
245
246<p>The format of the GetCacheViewStorageClass method is:</p>
247
248<pre class="code">
249 ClassType GetCacheViewStorageClass(const CacheView *cache_view)
250</pre>
251
252<p>A description of each parameter follows:</p></ol>
253
254<h5>cache_view</h5>
255<ol><p>the cache view.</p></ol>
256
257 </div>
258<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
259_8c.html" target="source" name="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2>
260<div class="doc-section">
261
262<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></ol>
263
264<p>The format of the GetCacheViewAuthenticPixels method is:</p>
265
266<pre class="code">
267 PixelPacket *GetCacheViewAuthenticPixels(CacheView *cache_view,
268 const long x,const long y,const unsigned long columns,
269 const unsigned long rows,ExceptionInfo *exception)
270</pre>
271
272<p>A description of each parameter follows:</p></ol>
273
274<h5>cache_view</h5>
275<ol><p>the cache view.</p></ol>
276
277<h5>x,y,columns,rows</h5>
278<ol><p>These values define the perimeter of a region of pixels.</p></ol>
279
280 </div>
281<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
282_8c.html" target="source" name="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2>
283<div class="doc-section">
284
285<p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p></ol>
286
287<p>The format of the GetOneCacheViewAuthenticPixel method is:</p>
288
289<pre class="code">
290 MagickBooleaNType GetOneCacheViewAuthenticPixel(
291 const CacheView *cache_view,const long x,const long y,
292 Pixelpacket *pixel,ExceptionInfo *exception)
293</pre>
294
295<p>A description of each parameter follows:</p></ol>
296
297<h5>cache_view</h5>
298<ol><p>the cache view.</p></ol>
299
300<h5>x,y</h5>
301<ol><p>These values define the offset of the pixel.</p></ol>
302
303<h5>pixel</h5>
304<ol><p>return a pixel at the specified (x,y) location.</p></ol>
305
306<h5>exception</h5>
307<ol><p>return any errors or warnings in this structure.</p></ol>
308
309 </div>
310<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
311_8c.html" target="source" name="GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a></h2>
312<div class="doc-section">
313
314<p>GetCacheViewAuthenticIndexQueue() returns the indexes associated with the last call to SetCacheViewIndexes() or GetCacheViewAuthenticIndexQueue(). The indexes are authentic and can be updated.</p></ol>
315
316<p>The format of the GetCacheViewAuthenticIndexQueue() method is:</p>
317
318<pre class="code">
319 IndexPacket *GetCacheViewAuthenticIndexQueue(CacheView *cache_view)
320</pre>
321
322<p>A description of each parameter follows:</p></ol>
323
324<h5>cache_view</h5>
325<ol><p>the cache view.</p></ol>
326
327 </div>
328<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
329_8c.html" target="source" name="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2>
330<div class="doc-section">
331
332<p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels(). The pixels are authentic and therefore can be updated.</p></ol>
333
334<p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p>
335
336<pre class="code">
337 PixelPacket *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
338</pre>
339
340<p>A description of each parameter follows:</p></ol>
341
342<h5>cache_view</h5>
343<ol><p>the cache view.</p></ol>
344
345 </div>
346<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
347_8c.html" target="source" name="GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a></h2>
348<div class="doc-section">
349
350<p>GetCacheViewVirtualIndexQueue() returns the indexes associated with the last call to GetCacheViewVirtualIndexQueue(). The indexes are virtual and therefore cannot be updated.</p></ol>
351
352<p>The format of the GetCacheViewVirtualIndexQueue() method is:</p>
353
354<pre class="code">
355 const IndexPacket *GetCacheViewVirtualIndexQueue(
356 const CacheView *cache_view)
357</pre>
358
359<p>A description of each parameter follows:</p></ol>
360
361<h5>cache_view</h5>
362<ol><p>the cache view.</p></ol>
363
364 </div>
365<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
366_8c.html" target="source" name="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2>
367<div class="doc-section">
368
369<p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p></ol>
370
371<p>The format of the GetCacheViewVirtualPixelQueue() method is:</p>
372
373<pre class="code">
374 const PixelPacket *GetCacheViewVirtualPixelQueue(
375 const CacheView *cache_view)
376</pre>
377
378<p>A description of each parameter follows:</p></ol>
379
380<h5>cache_view</h5>
381<ol><p>the cache view.</p></ol>
382
383 </div>
384<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
385_8c.html" target="source" name="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2>
386<div class="doc-section">
387
388<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></ol>
389
390<p>The format of the GetCacheViewVirtualPixels method is:</p>
391
392<pre class="code">
393 const PixelPacket *GetCacheViewVirtualPixels(
394 const CacheView *cache_view,const long x,const long y,
395 const unsigned long columns,const unsigned long rows,
396 ExceptionInfo *exception)
397</pre>
398
399<p>A description of each parameter follows:</p></ol>
400
401<h5>cache_view</h5>
402<ol><p>the cache view.</p></ol>
403
404<h5>x,y,columns,rows</h5>
405<ol><p>These values define the perimeter of a region of pixels.</p></ol>
406
407<h5>exception</h5>
408<ol><p>return any errors or warnings in this structure.</p></ol>
409
410 </div>
411<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
412_8c.html" target="source" name="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2>
413<div class="doc-section">
414
415<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></ol>
416
417<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
418
419<pre class="code">
420 MagickBooleanType GetOneCacheViewVirtualPixel(
421 const CacheView *cache_view,const long x,const long y,
422 PixelPacket *pixel,ExceptionInfo *exception)
423</pre>
424
425<p>A description of each parameter follows:</p></ol>
426
427<h5>cache_view</h5>
428<ol><p>the cache view.</p></ol>
429
430<h5>x,y</h5>
431<ol><p>These values define the offset of the pixel.</p></ol>
432
433<h5>pixel</h5>
434<ol><p>return a pixel at the specified (x,y) location.</p></ol>
435
436<h5>exception</h5>
437<ol><p>return any errors or warnings in this structure.</p></ol>
438
439 </div>
440<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
441_8c.html" target="source" name="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2>
442<div class="doc-section">
443
444<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></ol>
445
446<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
447
448<pre class="code">
449 MagickBooleanType GetOneCacheViewVirtualMethodPixel(
450 const CacheView *cache_view,
451 const VirtualPixelMethod virtual_pixel_method,const long x,
452 const long y,PixelPacket *pixel,ExceptionInfo *exception)
453</pre>
454
455<p>A description of each parameter follows:</p></ol>
456
457<h5>cache_view</h5>
458<ol><p>the cache view.</p></ol>
459
460<h5>virtual_pixel_method</h5>
461<ol><p>the virtual pixel method.</p></ol>
462
463<h5>x,y</h5>
464<ol><p>These values define the offset of the pixel.</p></ol>
465
466<h5>pixel</h5>
467<ol><p>return a pixel at the specified (x,y) location.</p></ol>
468
469<h5>exception</h5>
470<ol><p>return any errors or warnings in this structure.</p></ol>
471
472 </div>
473<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
474_8c.html" target="source" name="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2>
475<div class="doc-section">
476
477<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></ol>
478
479<p>The format of the QueueCacheViewAuthenticPixels method is:</p>
480
481<pre class="code">
482 PixelPacket *QueueCacheViewAuthenticPixels(CacheView *cache_view,
483 const long x,const long y,const unsigned long columns,
484 const unsigned long rows,ExceptionInfo *exception)
485</pre>
486
487<p>A description of each parameter follows:</p></ol>
488
489<h5>cache_view</h5>
490<ol><p>the cache view.</p></ol>
491
492<h5>x,y,columns,rows</h5>
493<ol><p>These values define the perimeter of a region of pixels.</p></ol>
494
495<h5>exception</h5>
496<ol><p>return any errors or warnings in this structure.</p></ol>
497
498 </div>
499<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
500_8c.html" target="source" name="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2>
501<div class="doc-section">
502
503<p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p></ol>
504
505<p>The format of the SetCacheViewStorageClass method is:</p>
506
507<pre class="code">
508 MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
509 const ClassType storage_class)
510</pre>
511
512<p>A description of each parameter follows:</p></ol>
513
514<h5>cache_view</h5>
515<ol><p>the cache view.</p></ol>
516
517<h5>storage_class</h5>
518<ol><p>the image storage class: PseudoClass or DirectClass.</p></ol>
519
520 </div>
521<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
522_8c.html" target="source" name="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2>
523<div class="doc-section">
524
525<p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p></ol>
526
527<p>The format of the SetCacheViewVirtualPixelMethod method is:</p>
528
529<pre class="code">
530 MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view,
531 const VirtualPixelMethod virtual_pixel_method)
532</pre>
533
534<p>A description of each parameter follows:</p></ol>
535
536<h5>cache_view</h5>
537<ol><p>the cache view.</p></ol>
538
539<h5>virtual_pixel_method</h5>
540<ol><p>the virtual pixel method.</p></ol>
541
542 </div>
543<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
544_8c.html" target="source" name="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2>
545<div class="doc-section">
546
547<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></ol>
548
549<p>The format of the SyncCacheViewAuthenticPixels method is:</p>
550
551<pre class="code">
552 MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view,
553 ExceptionInfo *exception)
554</pre>
555
556<p>A description of each parameter follows:</p></ol>
557
558<h5>cache_view</h5>
559<ol><p>the cache view.</p></ol>
560
561<h5>exception</h5>
562<ol><p>return any errors or warnings in this structure.</p></ol>
563
564 </div>
565
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