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<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>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="AcquireCacheView">AcquireCacheView</a></h2>
</div>
<p>AcquireCacheView() acquires a view into the pixel cache, using the VirtualPixelMethod that is defined within the given image itself.</p></ol>
<p>The format of the AcquireCacheView method is:</p>
<pre class="code">
ViewInfo *AcquireCacheView(const Image *image)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>image</h5>
<ol><p>the image.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="CloneCacheView">CloneCacheView</a></h2>
</div>
<p>CloneCacheView() makes an exact copy of the specified cache view.</p></ol>
<p>The format of the CloneCacheView method is:</p>
<pre class="code">
ViewInfo *CloneCacheView(const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="DestroyCacheView">DestroyCacheView</a></h2>
</div>
<p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p></ol>
<p>The format of the DestroyCacheView method is:</p>
<pre class="code">
ViewInfo *DestroyCacheView(ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewColorspace">GetCacheViewColorspace</a></h2>
</div>
<p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p></ol>
<p>The format of the GetCacheViewColorspace method is:</p>
<pre class="code">
ColorspaceType GetCacheViewColorspace(const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewException">GetCacheViewException</a></h2>
</div>
<p>GetCacheViewException() returns the image exception associated with the specified view.</p></ol>
<p>The format of the GetCacheViewException method is:</p>
<pre class="code">
ExceptionInfo GetCacheViewException(const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2>
</div>
<p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p></ol>
<p>The format of the GetCacheViewStorageClass method is:</p>
<pre class="code">
ClassType GetCacheViewStorageClass(const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2>
</div>
<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>
<p>The format of the GetCacheViewAuthenticPixels method is:</p>
<pre class="code">
PixelPacket *GetCacheViewAuthenticPixels(ViewInfo *cache_view,
const long x,const long y,const unsigned long columns,
const unsigned long rows,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>x,y,columns,rows</h5>
<ol><p>These values define the perimeter of a region of pixels.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2>
</div>
<p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location. The image background color is returned if an error occurs.</p></ol>
<p>The format of the GetOneCacheViewAuthenticPixel method is:</p>
<pre class="code">
MagickBooleaNType GetOneCacheViewAuthenticPixel(
const ViewInfo *cache_view,const long x,const long y,
Pixelpacket *pixel,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>x,y</h5>
<ol><p>These values define the offset of the pixel.</p></ol>
<h5>pixel</h5>
<ol><p>return a pixel at the specified (x,y) location.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a></h2>
</div>
<p>GetCacheViewAuthenticIndexQueue() returns the indexes associated with the last call to SetCacheViewIndexes() or GetCacheViewAuthenticIndexQueue(). The indexes are authentic and can be updated.</p></ol>
<p>The format of the GetCacheViewAuthenticIndexQueue() method is:</p>
<pre class="code">
IndexPacket *GetCacheViewAuthenticIndexQueue(ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2>
</div>
<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>
<p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p>
<pre class="code">
PixelPacket *GetCacheViewAuthenticPixelQueue(ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a></h2>
</div>
<p>GetCacheViewVirtualIndexQueue() returns the indexes associated with the last call to GetCacheViewVirtualIndexQueue(). The indexes are virtual and therefore cannot be updated.</p></ol>
<p>The format of the GetCacheViewVirtualIndexQueue() method is:</p>
<pre class="code">
const IndexPacket *GetCacheViewVirtualIndexQueue(
const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2>
</div>
<p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels(). The pixels are virtual and therefore cannot be updated.</p></ol>
<p>The format of the GetCacheViewVirtualPixelQueue() method is:</p>
<pre class="code">
const PixelPacket *GetCacheViewVirtualPixelQueue(
const ViewInfo *cache_view)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2>
</div>
<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>
<p>The format of the GetCacheViewVirtualPixels method is:</p>
<pre class="code">
const PixelPacket *GetCacheViewVirtualPixels(
const ViewInfo *cache_view,const long x,const long y,
const unsigned long columns,const unsigned long rows,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>x,y,columns,rows</h5>
<ol><p>These values define the perimeter of a region of pixels.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2>
</div>
<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>
<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
<pre class="code">
MagickBooleanType GetOneCacheViewVirtualPixel(
const ViewInfo *cache_view,const long x,const long y,
PixelPacket *pixel,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>x,y</h5>
<ol><p>These values define the offset of the pixel.</p></ol>
<h5>pixel</h5>
<ol><p>return a pixel at the specified (x,y) location.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2>
</div>
<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>
<p>The format of the GetOneCacheViewVirtualPixel method is:</p>
<pre class="code">
MagickBooleanType GetOneCacheViewVirtualMethodPixel(
const ViewInfo *cache_view,
const VirtualPixelMethod virtual_pixel_method,const long x,
const long y,PixelPacket *pixel,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>virtual_pixel_method</h5>
<ol><p>the virtual pixel method.</p></ol>
<h5>x,y</h5>
<ol><p>These values define the offset of the pixel.</p></ol>
<h5>pixel</h5>
<ol><p>return a pixel at the specified (x,y) location.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2>
</div>
<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>
<p>The format of the QueueCacheViewAuthenticPixels method is:</p>
<pre class="code">
PixelPacket *QueueCacheViewAuthenticPixels(ViewInfo *cache_view,
const long x,const long y,const unsigned long columns,
const unsigned long rows,ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>x,y,columns,rows</h5>
<ol><p>These values define the perimeter of a region of pixels.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2>
</div>
<p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p></ol>
<p>The format of the SetCacheViewStorageClass method is:</p>
<pre class="code">
MagickBooleanType SetCacheViewStorageClass(ViewInfo *cache_view,
const ClassType storage_class)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>storage_class</h5>
<ol><p>the image storage class: PseudoClass or DirectClass.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2>
</div>
<p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p></ol>
<p>The format of the SetCacheViewVirtualPixelMethod method is:</p>
<pre class="code">
MagickBooleanType SetCacheViewVirtualPixelMethod(ViewInfo *cache_view,
const VirtualPixelMethod virtual_pixel_method)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>virtual_pixel_method</h5>
<ol><p>the virtual pixel method.</p></ol>
<div style="margin: auto;">
<h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view
_8c.html" target="source" name="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2>
</div>
<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>
<p>The format of the SyncCacheViewAuthenticPixels method is:</p>
<pre class="code">
MagickBooleanType SyncCacheViewAuthenticPixels(ViewInfo *cache_view,
ExceptionInfo *exception)
</pre>
<p>A description of each parameter follows:</p></ol>
<h5>cache_view</h5>
<ol><p>the cache view.</p></ol>
<h5>exception</h5>
<ol><p>return any errors or warnings in this structure.</p></ol>
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