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94<p class="text-center"><a href="cache-view.html#AcquireAuthenticCacheView">AcquireAuthenticCacheView</a> &#8226; <a href="cache-view.html#AcquireVirtualCacheView">AcquireVirtualCacheView</a> &#8226; <a href="cache-view.html#CloneCacheView">CloneCacheView</a> &#8226; <a href="cache-view.html#DestroyCacheView">DestroyCacheView</a> &#8226; <a href="cache-view.html#GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a> &#8226; <a href="cache-view.html#GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a> &#8226; <a href="cache-view.html#GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a> &#8226; <a href="cache-view.html#GetCacheViewColorspace">GetCacheViewColorspace</a> &#8226; <a href="cache-view.html#GetCacheViewImage">GetCacheViewImage</a> &#8226; <a href="cache-view.html#GetCacheViewStorageClass">GetCacheViewStorageClass</a> &#8226; <a href="cache-view.html#GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a> &#8226; <a href="cache-view.html#GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a> &#8226; <a href="cache-view.html#GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a> &#8226; <a href="cache-view.html#GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a> &#8226; <a href="cache-view.html#GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a> &#8226; <a href="cache-view.html#GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a> &#8226; <a href="cache-view.html#GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a> &#8226; <a href="cache-view.html#QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a> &#8226; <a href="cache-view.html#SetCacheViewStorageClass">SetCacheViewStorageClass</a> &#8226; <a href="cache-view.html#SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a> &#8226; <a href="cache-view.html#SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></p>
95
96<h2><a href="../../api/MagickCore/cache-view_8c.html" id="AcquireAuthenticCacheView">AcquireAuthenticCacheView</a></h2>
97
98<p>AcquireAuthenticCacheView() acquires an authentic view into the pixel cache. It always succeeds but may return a warning or informational exception.</p>
99
100<p>The format of the AcquireAuthenticCacheView method is:</p>
101
102<pre class="text">
103CacheView *AcquireAuthenticCacheView(const Image *image,
104  ExceptionInfo *exception)
105</pre>
106
107<p>A description of each parameter follows:</p>
108
109<dd>
110</dd>
111
112<dd> </dd>
113<dl class="dl-horizontal">
114<dt>image</dt>
115<dd>the image. </dd>
116
117<dd> </dd>
118<dt>exception</dt>
119<dd>return any errors or warnings in this structure. </dd>
120
121<dd>  </dd>
122</dl>
123<h2><a href="../../api/MagickCore/cache-view_8c.html" id="AcquireVirtualCacheView">AcquireVirtualCacheView</a></h2>
124
125<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>
126
127<p>The format of the AcquireVirtualCacheView method is:</p>
128
129<pre class="text">
130CacheView *AcquireVirtualCacheView(const Image *image,
131  ExceptionInfo *exception)
132</pre>
133
134<p>A description of each parameter follows:</p>
135
136<dd>
137</dd>
138
139<dd> </dd>
140<dl class="dl-horizontal">
141<dt>image</dt>
142<dd>the image. </dd>
143
144<dd> </dd>
145<dt>exception</dt>
146<dd>return any errors or warnings in this structure. </dd>
147
148<dd>  </dd>
149</dl>
150<h2><a href="../../api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2>
151
152<p>CloneCacheView()  makes an exact copy of the specified cache view.</p>
153
154<p>The format of the CloneCacheView method is:</p>
155
156<pre class="text">
157CacheView *CloneCacheView(const CacheView *cache_view)
158</pre>
159
160<p>A description of each parameter follows:</p>
161
162<dd>
163</dd>
164
165<dd> </dd>
166<dl class="dl-horizontal">
167<dt>cache_view</dt>
168<dd>the cache view. </dd>
169
170<dd>  </dd>
171</dl>
172<h2><a href="../../api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2>
173
174<p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p>
175
176<p>The format of the DestroyCacheView method is:</p>
177
178<pre class="text">
179CacheView *DestroyCacheView(CacheView *cache_view)
180</pre>
181
182<p>A description of each parameter follows:</p>
183
184<dd>
185</dd>
186
187<dd> </dd>
188<dl class="dl-horizontal">
189<dt>cache_view</dt>
190<dd>the cache view. </dd>
191
192<dd>  </dd>
193</dl>
194<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2>
195
196<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>
197
198<p>The format of the GetCacheViewAuthenticPixels method is:</p>
199
200<pre class="text">
201Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
202  const ssize_t x,const ssize_t y,const size_t columns,
203  const size_t rows,ExceptionInfo *exception)
204</pre>
205
206<p>A description of each parameter follows:</p>
207
208<dd>
209</dd>
210
211<dd> </dd>
212<dl class="dl-horizontal">
213<dt>cache_view</dt>
214<dd>the cache view. </dd>
215
216<dd> </dd>
217<dt>x,y,columns,rows</dt>
218<dd> These values define the perimeter of a region of pixels. </dd>
219
220<dd> </dd>
221<dt>exception</dt>
222<dd>return any errors or warnings in this structure. </dd>
223
224<dd>  </dd>
225</dl>
226<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a></h2>
227
228<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>
229
230<p>The format of the GetCacheViewAuthenticMetacontent() method is:</p>
231
232<pre class="text">
233void *GetCacheViewAuthenticMetacontent(CacheView *cache_view)
234</pre>
235
236<p>A description of each parameter follows:</p>
237
238<dd>
239</dd>
240
241<dd> </dd>
242<dl class="dl-horizontal">
243<dt>cache_view</dt>
244<dd>the cache view. </dd>
245
246<dd>  </dd>
247</dl>
248<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2>
249
250<p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels().  The pixels are authentic and therefore can be updated.</p>
251
252<p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p>
253
254<pre class="text">
255Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
256</pre>
257
258<p>A description of each parameter follows:</p>
259
260<dd>
261</dd>
262
263<dd> </dd>
264<dl class="dl-horizontal">
265<dt>cache_view</dt>
266<dd>the cache view. </dd>
267
268<dd>  </dd>
269</dl>
270<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2>
271
272<p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p>
273
274<p>The format of the GetCacheViewColorspace method is:</p>
275
276<pre class="text">
277ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
278</pre>
279
280<p>A description of each parameter follows:</p>
281
282<dd>
283</dd>
284
285<dd> </dd>
286<dl class="dl-horizontal">
287<dt>cache_view</dt>
288<dd>the cache view. </dd>
289
290<dd>  </dd>
291</dl>
292<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewImage">GetCacheViewImage</a></h2>
293
294<p>GetCacheViewImage() returns the image associated with the specified view.</p>
295
296<p>The format of the GetCacheViewImage method is:</p>
297
298<pre class="text">
299const Image *GetCacheViewImage(const CacheView *cache_view)
300</pre>
301
302<p>A description of each parameter follows:</p>
303
304<dd>
305</dd>
306
307<dd> </dd>
308<dl class="dl-horizontal">
309<dt>cache_view</dt>
310<dd>the cache view. </dd>
311
312<dd>  </dd>
313</dl>
314<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2>
315
316<p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p>
317
318<p>The format of the GetCacheViewStorageClass method is:</p>
319
320<pre class="text">
321ClassType GetCacheViewStorageClass(const CacheView *cache_view)
322</pre>
323
324<p>A description of each parameter follows:</p>
325
326<dd>
327</dd>
328
329<dd> </dd>
330<dl class="dl-horizontal">
331<dt>cache_view</dt>
332<dd>the cache view. </dd>
333
334<dd>  </dd>
335</dl>
336<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a></h2>
337
338<p>GetCacheViewVirtualMetacontent() returns the meta-content corresponding with the last call to GetCacheViewVirtualMetacontent().  The meta-content is virtual and therefore cannot be updated.</p>
339
340<p>The format of the GetCacheViewVirtualMetacontent() method is:</p>
341
342<pre class="text">
343const void *GetCacheViewVirtualMetacontent(
344  const CacheView *cache_view)
345</pre>
346
347<p>A description of each parameter follows:</p>
348
349<dd>
350</dd>
351
352<dd> </dd>
353<dl class="dl-horizontal">
354<dt>cache_view</dt>
355<dd>the cache view. </dd>
356
357<dd>  </dd>
358</dl>
359<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2>
360
361<p>GetCacheViewVirtualPixelQueue() returns the pixels associated with the last call to GetCacheViewVirtualPixels().  The pixels are virtual and therefore cannot be updated.</p>
362
363<p>The format of the GetCacheViewVirtualPixelQueue() method is:</p>
364
365<pre class="text">
366const Quantum *GetCacheViewVirtualPixelQueue(
367  const CacheView *cache_view)
368</pre>
369
370<p>A description of each parameter follows:</p>
371
372<dd>
373</dd>
374
375<dd> </dd>
376<dl class="dl-horizontal">
377<dt>cache_view</dt>
378<dd>the cache view. </dd>
379
380<dd>  </dd>
381</dl>
382<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2>
383
384<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>
385
386<p>The format of the GetCacheViewVirtualPixels method is:</p>
387
388<pre class="text">
389const Quantum *GetCacheViewVirtualPixels(
390  const CacheView *cache_view,const ssize_t x,const ssize_t y,
391  const size_t columns,const size_t rows,ExceptionInfo *exception)
392</pre>
393
394<p>A description of each parameter follows:</p>
395
396<dd>
397</dd>
398
399<dd> </dd>
400<dl class="dl-horizontal">
401<dt>cache_view</dt>
402<dd>the cache view. </dd>
403
404<dd> </dd>
405<dt>x,y,columns,rows</dt>
406<dd> These values define the perimeter of a region of pixels. </dd>
407
408<dd> </dd>
409<dt>exception</dt>
410<dd>return any errors or warnings in this structure. </dd>
411
412<dd>  </dd>
413</dl>
414<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2>
415
416<p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location.  The image background color is returned if an error occurs.</p>
417
418<p>The format of the GetOneCacheViewAuthenticPixel method is:</p>
419
420<pre class="text">
421MagickBooleaNType GetOneCacheViewAuthenticPixel(
422  const CacheView *cache_view,const ssize_t x,const ssize_t y,
423  Quantum *pixel,ExceptionInfo *exception)
424</pre>
425
426<p>A description of each parameter follows:</p>
427
428<dd>
429</dd>
430
431<dd> </dd>
432<dl class="dl-horizontal">
433<dt>cache_view</dt>
434<dd>the cache view. </dd>
435
436<dd> </dd>
437<dt>x,y</dt>
438<dd> These values define the offset of the pixel. </dd>
439
440<dd> </dd>
441<dt>pixel</dt>
442<dd>return a pixel at the specified (x,y) location. </dd>
443
444<dd> </dd>
445<dt>exception</dt>
446<dd>return any errors or warnings in this structure. </dd>
447
448<dd>  </dd>
449</dl>
450<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2>
451
452<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>
453
454<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
455
456<pre class="text">
457MagickBooleanType GetOneCacheViewVirtualPixel(
458  const CacheView *cache_view,const ssize_t x,const ssize_t y,
459  Quantum *pixel,ExceptionInfo *exception)
460</pre>
461
462<p>A description of each parameter follows:</p>
463
464<dd>
465</dd>
466
467<dd> </dd>
468<dl class="dl-horizontal">
469<dt>cache_view</dt>
470<dd>the cache view. </dd>
471
472<dd> </dd>
473<dt>x,y</dt>
474<dd> These values define the offset of the pixel. </dd>
475
476<dd> </dd>
477<dt>pixel</dt>
478<dd>return a pixel at the specified (x,y) location. </dd>
479
480<dd> </dd>
481<dt>exception</dt>
482<dd>return any errors or warnings in this structure. </dd>
483
484<dd>  </dd>
485</dl>
486<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a></h2>
487
488<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>
489
490<p>The format of the GetOneCacheViewVirtualPixelInfo method is:</p>
491
492<pre class="text">
493MagickBooleanType GetOneCacheViewVirtualPixelInfo(
494  const CacheView *cache_view,const ssize_t x,const ssize_t y,
495  PixelInfo *pixel,ExceptionInfo *exception)
496</pre>
497
498<p>A description of each parameter follows:</p>
499
500<dd>
501</dd>
502
503<dd> </dd>
504<dl class="dl-horizontal">
505<dt>cache_view</dt>
506<dd>the cache view. </dd>
507
508<dd> </dd>
509<dt>x,y</dt>
510<dd> These values define the offset of the pixel. </dd>
511
512<dd> </dd>
513<dt>pixel</dt>
514<dd>return a pixel at the specified (x,y) location. </dd>
515
516<dd> </dd>
517<dt>exception</dt>
518<dd>return any errors or warnings in this structure. </dd>
519
520<dd>  </dd>
521</dl>
522<h2><a href="../../api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2>
523
524<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>
525
526<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
527
528<pre class="text">
529MagickBooleanType GetOneCacheViewVirtualMethodPixel(
530  const CacheView *cache_view,
531  const VirtualPixelMethod virtual_pixel_method,const ssize_t x,
532  const ssize_t y,Quantum *pixel,ExceptionInfo *exception)
533</pre>
534
535<p>A description of each parameter follows:</p>
536
537<dd>
538</dd>
539
540<dd> </dd>
541<dl class="dl-horizontal">
542<dt>cache_view</dt>
543<dd>the cache view. </dd>
544
545<dd> </dd>
546<dt>virtual_pixel_method</dt>
547<dd>the virtual pixel method. </dd>
548
549<dd> </dd>
550<dt>x,y</dt>
551<dd> These values define the offset of the pixel. </dd>
552
553<dd> </dd>
554<dt>pixel</dt>
555<dd>return a pixel at the specified (x,y) location. </dd>
556
557<dd> </dd>
558<dt>exception</dt>
559<dd>return any errors or warnings in this structure. </dd>
560
561<dd>  </dd>
562</dl>
563<h2><a href="../../api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2>
564
565<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>
566
567<p>The format of the QueueCacheViewAuthenticPixels method is:</p>
568
569<pre class="text">
570Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
571  const ssize_t x,const ssize_t y,const size_t columns,
572  const size_t rows,ExceptionInfo *exception)
573</pre>
574
575<p>A description of each parameter follows:</p>
576
577<dd>
578</dd>
579
580<dd> </dd>
581<dl class="dl-horizontal">
582<dt>cache_view</dt>
583<dd>the cache view. </dd>
584
585<dd> </dd>
586<dt>x,y,columns,rows</dt>
587<dd> These values define the perimeter of a region of pixels. </dd>
588
589<dd> </dd>
590<dt>exception</dt>
591<dd>return any errors or warnings in this structure. </dd>
592
593<dd>  </dd>
594</dl>
595<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2>
596
597<p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p>
598
599<p>The format of the SetCacheViewStorageClass method is:</p>
600
601<pre class="text">
602MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
603  const ClassType storage_class,ExceptionInfo *exception)
604</pre>
605
606<p>A description of each parameter follows:</p>
607
608<dd>
609</dd>
610
611<dd> </dd>
612<dl class="dl-horizontal">
613<dt>cache_view</dt>
614<dd>the cache view. </dd>
615
616<dd> </dd>
617<dt>storage_class</dt>
618<dd>the image storage class: PseudoClass or DirectClass. </dd>
619
620<dd> </dd>
621<dt>exception</dt>
622<dd>return any errors or warnings in this structure. </dd>
623
624<dd>  </dd>
625</dl>
626<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2>
627
628<p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p>
629
630<p>The format of the SetCacheViewVirtualPixelMethod method is:</p>
631
632<pre class="text">
633MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view,
634  const VirtualPixelMethod virtual_pixel_method)
635</pre>
636
637<p>A description of each parameter follows:</p>
638
639<dd>
640</dd>
641
642<dd> </dd>
643<dl class="dl-horizontal">
644<dt>cache_view</dt>
645<dd>the cache view. </dd>
646
647<dd> </dd>
648<dt>virtual_pixel_method</dt>
649<dd>the virtual pixel method. </dd>
650
651<dd>  </dd>
652</dl>
653<h2><a href="../../api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2>
654
655<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>
656
657<p>The format of the SyncCacheViewAuthenticPixels method is:</p>
658
659<pre class="text">
660MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view,
661  ExceptionInfo *exception)
662</pre>
663
664<p>A description of each parameter follows:</p>
665
666<dd>
667</dd>
668
669<dd> </dd>
670<dl class="dl-horizontal">
671<dt>cache_view</dt>
672<dd>the cache view. </dd>
673
674<dd> </dd>
675<dt>exception</dt>
676<dd>return any errors or warnings in this structure. </dd>
677
678<dd>  </dd>
679</dl>
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