www/api/cache-view.html - platform/external/ImageMagick - Gitiles

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 <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>

 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="AcquireAuthenticCacheView">AcquireAuthenticCacheView</a></h2>

 <p>AcquireAuthenticCacheView() acquires an authentic view into the pixel cache. It always succeeds but may return a warning or informational exception.</p>

 <p>The format of the AcquireAuthenticCacheView method is:</p>

 <pre class="text">
 CacheView *AcquireAuthenticCacheView(const Image *image,
   ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>image</dt>
 <dd>the image. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="AcquireVirtualCacheView">AcquireVirtualCacheView</a></h2>

 <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>

 <p>The format of the AcquireVirtualCacheView method is:</p>

 <pre class="text">
 CacheView *AcquireVirtualCacheView(const Image *image,
   ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>image</dt>
 <dd>the image. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2>

 <p>CloneCacheView()  makes an exact copy of the specified cache view.</p>

 <p>The format of the CloneCacheView method is:</p>

 <pre class="text">
 CacheView *CloneCacheView(const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2>

 <p>DestroyCacheView() destroys the specified view returned by a previous call to AcquireCacheView().</p>

 <p>The format of the DestroyCacheView method is:</p>

 <pre class="text">
 CacheView *DestroyCacheView(CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2>

 <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>

 <p>The format of the GetCacheViewAuthenticPixels method is:</p>

 <pre class="text">
 Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
   const ssize_t x,const ssize_t y,const size_t columns,
   const size_t rows,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y,columns,rows</dt>
 <dd> These values define the perimeter of a region of pixels. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticMetacontent">GetCacheViewAuthenticMetacontent</a></h2>

 <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>

 <p>The format of the GetCacheViewAuthenticMetacontent() method is:</p>

 <pre class="text">
 void *GetCacheViewAuthenticMetacontent(CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2>

 <p>GetCacheViewAuthenticPixelQueue() returns the pixels associated with the last call to QueueCacheViewAuthenticPixels() or GetCacheViewAuthenticPixels().  The pixels are authentic and therefore can be updated.</p>

 <p>The format of the GetCacheViewAuthenticPixelQueue() method is:</p>

 <pre class="text">
 Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2>

 <p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p>

 <p>The format of the GetCacheViewColorspace method is:</p>

 <pre class="text">
 ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewImage">GetCacheViewImage</a></h2>

 <p>GetCacheViewImage() returns the image associated with the specified view.</p>

 <p>The format of the GetCacheViewImage method is:</p>

 <pre class="text">
 const Image *GetCacheViewImage(const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2>

 <p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p>

 <p>The format of the GetCacheViewStorageClass method is:</p>

 <pre class="text">
 ClassType GetCacheViewStorageClass(const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualMetacontent">GetCacheViewVirtualMetacontent</a></h2>

 <p>GetCacheViewVirtualMetacontent() returns the meta-content corresponding with the last call to GetCacheViewVirtualMetacontent().  The meta-content is virtual and therefore cannot be updated.</p>

 <p>The format of the GetCacheViewVirtualMetacontent() method is:</p>

 <pre class="text">
 const void *GetCacheViewVirtualMetacontent(
   const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2>

 <p>GetCacheViewVirtualPixelQueue() returns the the pixels associated with the last call to GetCacheViewVirtualPixels().  The pixels are virtual and therefore cannot be updated.</p>

 <p>The format of the GetCacheViewVirtualPixelQueue() method is:</p>

 <pre class="text">
 const Quantum *GetCacheViewVirtualPixelQueue(
   const CacheView *cache_view)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2>

 <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>

 <p>The format of the GetCacheViewVirtualPixels method is:</p>

 <pre class="text">
 const Quantum *GetCacheViewVirtualPixels(
   const CacheView *cache_view,const ssize_t x,const ssize_t y,
   const size_t columns,const size_t rows,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y,columns,rows</dt>
 <dd> These values define the perimeter of a region of pixels. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2>

 <p>GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y) location.  The image background color is returned if an error occurs.</p>

 <p>The format of the GetOneCacheViewAuthenticPixel method is:</p>

 <pre class="text">
 MagickBooleaNType GetOneCacheViewAuthenticPixel(
   const CacheView *cache_view,const ssize_t x,const ssize_t y,
   Quantum *pixel,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y</dt>
 <dd> These values define the offset of the pixel. </dd>

 <dd> </dd>
 <dt>pixel</dt>
 <dd>return a pixel at the specified (x,y) location. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2>

 <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>

 <p>The format of the GetOneCacheViewVirtualPixel method is:</p>

 <pre class="text">
 MagickBooleanType GetOneCacheViewVirtualPixel(
   const CacheView *cache_view,const ssize_t x,const ssize_t y,
   Quantum *pixel,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y</dt>
 <dd> These values define the offset of the pixel. </dd>

 <dd> </dd>
 <dt>pixel</dt>
 <dd>return a pixel at the specified (x,y) location. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixelInfo">GetOneCacheViewVirtualPixelInfo</a></h2>

 <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>

 <p>The format of the GetOneCacheViewVirtualPixelInfo method is:</p>

 <pre class="text">
 MagickBooleanType GetOneCacheViewVirtualPixelInfo(
   const CacheView *cache_view,const ssize_t x,const ssize_t y,
   PixelInfo *pixel,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y</dt>
 <dd> These values define the offset of the pixel. </dd>

 <dd> </dd>
 <dt>pixel</dt>
 <dd>return a pixel at the specified (x,y) location. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2>

 <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>

 <p>The format of the GetOneCacheViewVirtualPixel method is:</p>

 <pre class="text">
 MagickBooleanType GetOneCacheViewVirtualMethodPixel(
   const CacheView *cache_view,
   const VirtualPixelMethod virtual_pixel_method,const ssize_t x,
   const ssize_t y,Quantum *pixel,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>virtual_pixel_method</dt>
 <dd>the virtual pixel method. </dd>

 <dd> </dd>
 <dt>x,y</dt>
 <dd> These values define the offset of the pixel. </dd>

 <dd> </dd>
 <dt>pixel</dt>
 <dd>return a pixel at the specified (x,y) location. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2>

 <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>

 <p>The format of the QueueCacheViewAuthenticPixels method is:</p>

 <pre class="text">
 Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
   const ssize_t x,const ssize_t y,const size_t columns,
   const size_t rows,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>x,y,columns,rows</dt>
 <dd> These values define the perimeter of a region of pixels. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2>

 <p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p>

 <p>The format of the SetCacheViewStorageClass method is:</p>

 <pre class="text">
 MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view,
   const ClassType storage_class,ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>storage_class</dt>
 <dd>the image storage class: PseudoClass or DirectClass. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2>

 <p>SetCacheViewVirtualPixelMethod() sets the virtual pixel method associated with the specified cache view.</p>

 <p>The format of the SetCacheViewVirtualPixelMethod method is:</p>

 <pre class="text">
 MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view,
   const VirtualPixelMethod virtual_pixel_method)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>virtual_pixel_method</dt>
 <dd>the virtual pixel method. </dd>

 <dd>  </dd>
 </dl>
 <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2>

 <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>

 <p>The format of the SyncCacheViewAuthenticPixels method is:</p>

 <pre class="text">
 MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view,
   ExceptionInfo *exception)
 </pre>

 <p>A description of each parameter follows:</p>

 <dd>
 </dd>

 <dd> </dd>
 <dl class="dl-horizontal">
 <dt>cache_view</dt>
 <dd>the cache view. </dd>

 <dd> </dd>
 <dt>exception</dt>
 <dd>return any errors or warnings in this structure. </dd>

 <dd>  </dd>
 </dl>
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