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173 <p class="navigation-index">[<a href="#AcquireCacheView">AcquireCacheView</a> • <a href="#CloneCacheView">CloneCacheView</a> • <a href="#DestroyCacheView">DestroyCacheView</a> • <a href="#GetCacheViewColorspace">GetCacheViewColorspace</a> • <a href="#GetCacheViewException">GetCacheViewException</a> • <a href="#GetCacheViewStorageClass">GetCacheViewStorageClass</a> • <a href="#GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a> • <a href="#GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a> • <a href="#GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a> • <a href="#GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a> • <a href="#GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a> • <a href="#GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a> • <a href="#GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a> • <a href="#GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a> • <a href="#GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a> • <a href="#QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a> • <a href="#SetCacheViewStorageClass">SetCacheViewStorageClass</a> • <a href="#SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a> • <a href="#SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a>]</p>
175 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
176 _8c.html" target="source" name="AcquireCacheView">AcquireCacheView</a></h2>
177 <div class="doc-section">
179 <p>AcquireCacheView() acquires a view into the pixel cache, using the VirtualPixelMethod that is defined within the given image itself.</p></ol>
181 <p>The format of the AcquireCacheView method is:</p>
184 CacheView *AcquireCacheView(const Image *image)
187 <p>A description of each parameter follows:</p></ol>
190 <ol><p>the image.</p></ol>
193 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
194 _8c.html" target="source" name="CloneCacheView">CloneCacheView</a></h2>
195 <div class="doc-section">
197 <p>CloneCacheView() makes an exact copy of the specified cache view.</p></ol>
199 <p>The format of the CloneCacheView method is:</p>
202 CacheView *CloneCacheView(const CacheView *cache_view)
205 <p>A description of each parameter follows:</p></ol>
208 <ol><p>the cache view.</p></ol>
211 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
212 _8c.html" target="source" name="DestroyCacheView">DestroyCacheView</a></h2>
213 <div class="doc-section">
215 <p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p></ol>
217 <p>The format of the DestroyCacheView method is:</p>
220 CacheView *DestroyCacheView(CacheView *cache_view)
223 <p>A description of each parameter follows:</p></ol>
226 <ol><p>the cache view.</p></ol>
229 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
230 _8c.html" target="source" name="GetCacheViewColorspace">GetCacheViewColorspace</a></h2>
231 <div class="doc-section">
233 <p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p></ol>
235 <p>The format of the GetCacheViewColorspace method is:</p>
238 ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
241 <p>A description of each parameter follows:</p></ol>
244 <ol><p>the cache view.</p></ol>
247 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
248 _8c.html" target="source" name="GetCacheViewException">GetCacheViewException</a></h2>
249 <div class="doc-section">
251 <p>GetCacheViewException() returns the image exception associated with the specified view.</p></ol>
253 <p>The format of the GetCacheViewException method is:</p>
256 ExceptionInfo GetCacheViewException(const CacheView *cache_view)
259 <p>A description of each parameter follows:</p></ol>
262 <ol><p>the cache view.</p></ol>
265 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
266 _8c.html" target="source" name="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2>
267 <div class="doc-section">
269 <p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p></ol>
271 <p>The format of the GetCacheViewStorageClass method is:</p>
274 ClassType GetCacheViewStorageClass(const CacheView *cache_view)
277 <p>A description of each parameter follows:</p></ol>
280 <ol><p>the cache view.</p></ol>
283 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
284 _8c.html" target="source" name="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2>
285 <div class="doc-section">
287 <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>
289 <p>The format of the GetCacheViewAuthenticPixels method is:</p>
292 PixelPacket *GetCacheViewAuthenticPixels(CacheView *cache_view,
293 const ssize_t x,const ssize_t y,const size_t columns,
294 const size_t rows,ExceptionInfo *exception)
297 <p>A description of each parameter follows:</p></ol>
300 <ol><p>the cache view.</p></ol>
302 <h5>x,y,columns,rows</h5>
303 <ol><p>These values define the perimeter of a region of pixels.</p></ol>
306 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
307 _8c.html" target="source" name="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2>
308 <div class="doc-section">
310 <p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p></ol>
312 <p>The format of the GetOneCacheViewAuthenticPixel method is:</p>
315 MagickBooleaNType GetOneCacheViewAuthenticPixel(
316 const CacheView *cache_view,const ssize_t x,const ssize_t y,
317 Pixelpacket *pixel,ExceptionInfo *exception)
320 <p>A description of each parameter follows:</p></ol>
323 <ol><p>the cache view.</p></ol>
326 <ol><p>These values define the offset of the pixel.</p></ol>
329 <ol><p>return a pixel at the specified (x,y) location.</p></ol>
332 <ol><p>return any errors or warnings in this structure.</p></ol>
335 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
336 _8c.html" target="source" name="GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a></h2>
337 <div class="doc-section">
339 <p>GetCacheViewAuthenticIndexQueue() returns the indexes associated with the last call to SetCacheViewIndexes() or GetCacheViewAuthenticIndexQueue(). The indexes are authentic and can be updated.</p></ol>
341 <p>The format of the GetCacheViewAuthenticIndexQueue() method is:</p>
344 IndexPacket *GetCacheViewAuthenticIndexQueue(CacheView *cache_view)
347 <p>A description of each parameter follows:</p></ol>
350 <ol><p>the cache view.</p></ol>
353 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
354 _8c.html" target="source" name="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2>
355 <div class="doc-section">
357 <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>
359 <p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p>
362 PixelPacket *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
365 <p>A description of each parameter follows:</p></ol>
368 <ol><p>the cache view.</p></ol>
371 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
372 _8c.html" target="source" name="GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a></h2>
373 <div class="doc-section">
375 <p>GetCacheViewVirtualIndexQueue() returns the indexes associated with the last call to GetCacheViewVirtualIndexQueue(). The indexes are virtual and therefore cannot be updated.</p></ol>
377 <p>The format of the GetCacheViewVirtualIndexQueue() method is:</p>
380 const IndexPacket *GetCacheViewVirtualIndexQueue(
381 const CacheView *cache_view)
384 <p>A description of each parameter follows:</p></ol>
387 <ol><p>the cache view.</p></ol>
390 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
391 _8c.html" target="source" name="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2>
392 <div class="doc-section">
394 <p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p></ol>
396 <p>The format of the GetCacheViewVirtualPixelQueue() method is:</p>
399 const PixelPacket *GetCacheViewVirtualPixelQueue(
400 const CacheView *cache_view)
403 <p>A description of each parameter follows:</p></ol>
406 <ol><p>the cache view.</p></ol>
409 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
410 _8c.html" target="source" name="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2>
411 <div class="doc-section">
413 <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>
415 <p>The format of the GetCacheViewVirtualPixels method is:</p>
418 const PixelPacket *GetCacheViewVirtualPixels(
419 const CacheView *cache_view,const ssize_t x,const ssize_t y,
420 const size_t columns,const size_t rows,ExceptionInfo *exception)
423 <p>A description of each parameter follows:</p></ol>
426 <ol><p>the cache view.</p></ol>
428 <h5>x,y,columns,rows</h5>
429 <ol><p>These values define the perimeter of a region of pixels.</p></ol>
432 <ol><p>return any errors or warnings in this structure.</p></ol>
435 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
436 _8c.html" target="source" name="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2>
437 <div class="doc-section">
439 <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>
441 <p>The format of the GetOneCacheViewVirtualPixel method is:</p>
444 MagickBooleanType GetOneCacheViewVirtualPixel(
445 const CacheView *cache_view,const ssize_t x,const ssize_t y,
446 PixelPacket *pixel,ExceptionInfo *exception)
449 <p>A description of each parameter follows:</p></ol>
452 <ol><p>the cache view.</p></ol>
455 <ol><p>These values define the offset of the pixel.</p></ol>
458 <ol><p>return a pixel at the specified (x,y) location.</p></ol>
461 <ol><p>return any errors or warnings in this structure.</p></ol>
464 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
465 _8c.html" target="source" name="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2>
466 <div class="doc-section">
468 <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>
470 <p>The format of the GetOneCacheViewVirtualPixel method is:</p>
473 MagickBooleanType GetOneCacheViewVirtualMethodPixel(
474 const CacheView *cache_view,
475 const VirtualPixelMethod virtual_pixel_method,const ssize_t x,
476 const ssize_t y,PixelPacket *pixel,ExceptionInfo *exception)
479 <p>A description of each parameter follows:</p></ol>
482 <ol><p>the cache view.</p></ol>
484 <h5>virtual_pixel_method</h5>
485 <ol><p>the virtual pixel method.</p></ol>
488 <ol><p>These values define the offset of the pixel.</p></ol>
491 <ol><p>return a pixel at the specified (x,y) location.</p></ol>
494 <ol><p>return any errors or warnings in this structure.</p></ol>
497 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
498 _8c.html" target="source" name="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2>
499 <div class="doc-section">
501 <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>
503 <p>The format of the QueueCacheViewAuthenticPixels method is:</p>
506 PixelPacket *QueueCacheViewAuthenticPixels(CacheView *cache_view,
507 const ssize_t x,const ssize_t y,const size_t columns,
508 const size_t rows,ExceptionInfo *exception)
511 <p>A description of each parameter follows:</p></ol>
514 <ol><p>the cache view.</p></ol>
516 <h5>x,y,columns,rows</h5>
517 <ol><p>These values define the perimeter of a region of pixels.</p></ol>
520 <ol><p>return any errors or warnings in this structure.</p></ol>
523 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
524 _8c.html" target="source" name="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2>
525 <div class="doc-section">
527 <p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p></ol>
529 <p>The format of the SetCacheViewStorageClass method is:</p>
532 MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
533 const ClassType storage_class)
536 <p>A description of each parameter follows:</p></ol>
539 <ol><p>the cache view.</p></ol>
541 <h5>storage_class</h5>
542 <ol><p>the image storage class: PseudoClass or DirectClass.</p></ol>
545 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
546 _8c.html" target="source" name="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2>
547 <div class="doc-section">
549 <p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p></ol>
551 <p>The format of the SetCacheViewVirtualPixelMethod method is:</p>
554 MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view,
555 const VirtualPixelMethod virtual_pixel_method)
558 <p>A description of each parameter follows:</p></ol>
561 <ol><p>the cache view.</p></ol>
563 <h5>virtual_pixel_method</h5>
564 <ol><p>the virtual pixel method.</p></ol>
567 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
568 _8c.html" target="source" name="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2>
569 <div class="doc-section">
571 <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>
573 <p>The format of the SyncCacheViewAuthenticPixels method is:</p>
576 MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view,
577 ExceptionInfo *exception)
580 <p>A description of each parameter follows:</p></ol>
583 <ol><p>the cache view.</p></ol>
586 <ol><p>return any errors or warnings in this structure.</p></ol>
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