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|
| <h1>Module cache-view Methods</h1> |
| <p class="navigation-index">[<a href="#AcquireCacheView">AcquireCacheView</a> • <a href="#CloneCacheView">CloneCacheView</a> • <a href="#DestroyCacheView">DestroyCacheView</a> • <a href="#GetCacheViewChannels">GetCacheViewChannels</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> |
| |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="AcquireCacheView">AcquireCacheView</a></h2> |
| <div class="doc-section"> |
| |
| <p>AcquireCacheView() acquires a view into the pixel cache, using the VirtualPixelMethod that is defined within the given image itself.</p> |
| |
| <p>The format of the AcquireCacheView method is:</p> |
| |
| <pre class="code"> |
| CacheView *AcquireCacheView(const Image *image) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>image</h5> |
| <p>the image.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="CloneCacheView">CloneCacheView</a></h2> |
| <div class="doc-section"> |
| |
| <p>CloneCacheView() makes an exact copy of the specified cache view.</p> |
| |
| <p>The format of the CloneCacheView method is:</p> |
| |
| <pre class="code"> |
| CacheView *CloneCacheView(const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="DestroyCacheView">DestroyCacheView</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| CacheView *DestroyCacheView(CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewChannels">GetCacheViewChannels</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewChannels() returns the image pixel channels associated with the specified view.</p> |
| |
| <p>The format of the GetCacheViewChannels method is:</p> |
| |
| <pre class="code"> |
| size_t GetCacheViewChannels(const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewColorspace">GetCacheViewColorspace</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewColorspace() returns the image colorspace associated with the specified view.</p> |
| |
| <p>The format of the GetCacheViewColorspace method is:</p> |
| |
| <pre class="code"> |
| ColorspaceType GetCacheViewColorspace(const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewException">GetCacheViewException</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewException() returns the image exception associated with the specified view.</p> |
| |
| <p>The format of the GetCacheViewException method is:</p> |
| |
| <pre class="code"> |
| ExceptionInfo GetCacheViewException(const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewStorageClass">GetCacheViewStorageClass</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewStorageClass() returns the image storage class associated with the specified view.</p> |
| |
| <p>The format of the GetCacheViewStorageClass method is:</p> |
| |
| <pre class="code"> |
| ClassType GetCacheViewStorageClass(const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixels">GetCacheViewAuthenticPixels</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| PixelPacket *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> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>x,y,columns,rows</h5> |
| <p>These values define the perimeter of a region of pixels.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewAuthenticPixel">GetOneCacheViewAuthenticPixel</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| MagickBooleaNType GetOneCacheViewAuthenticPixel( |
| const CacheView *cache_view,const ssize_t x,const ssize_t y, |
| Pixelpacket *pixel,ExceptionInfo *exception) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>x,y</h5> |
| <p>These values define the offset of the pixel.</p> |
| |
| <h5>pixel</h5> |
| <p>return a pixel at the specified (x,y) location.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticIndexQueue">GetCacheViewAuthenticIndexQueue</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewAuthenticIndexQueue() returns the indexes associated with the last call to SetCacheViewIndexes() or GetCacheViewAuthenticIndexQueue(). The indexes are authentic and can be updated.</p> |
| |
| <p>The format of the GetCacheViewAuthenticIndexQueue() method is:</p> |
| |
| <pre class="code"> |
| IndexPacket *GetCacheViewAuthenticIndexQueue(CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewAuthenticPixelQueue">GetCacheViewAuthenticPixelQueue</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| PixelPacket *GetCacheViewAuthenticPixelQueue(CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualIndexQueue">GetCacheViewVirtualIndexQueue</a></h2> |
| <div class="doc-section"> |
| |
| <p>GetCacheViewVirtualIndexQueue() returns the indexes associated with the last call to GetCacheViewVirtualIndexQueue(). The indexes are virtual and therefore cannot be updated.</p> |
| |
| <p>The format of the GetCacheViewVirtualIndexQueue() method is:</p> |
| |
| <pre class="code"> |
| const IndexPacket *GetCacheViewVirtualIndexQueue( |
| const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixelQueue">GetCacheViewVirtualPixelQueue</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| const PixelPacket *GetCacheViewVirtualPixelQueue( |
| const CacheView *cache_view) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetCacheViewVirtualPixels">GetCacheViewVirtualPixels</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| const PixelPacket *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> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>x,y,columns,rows</h5> |
| <p>These values define the perimeter of a region of pixels.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualPixel">GetOneCacheViewVirtualPixel</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| MagickBooleanType GetOneCacheViewVirtualPixel( |
| const CacheView *cache_view,const ssize_t x,const ssize_t y, |
| PixelPacket *pixel,ExceptionInfo *exception) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>x,y</h5> |
| <p>These values define the offset of the pixel.</p> |
| |
| <h5>pixel</h5> |
| <p>return a pixel at the specified (x,y) location.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="GetOneCacheViewVirtualMethodPixel">GetOneCacheViewVirtualMethodPixel</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| MagickBooleanType GetOneCacheViewVirtualMethodPixel( |
| const CacheView *cache_view, |
| const VirtualPixelMethod virtual_pixel_method,const ssize_t x, |
| const ssize_t y,PixelPacket *pixel,ExceptionInfo *exception) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>virtual_pixel_method</h5> |
| <p>the virtual pixel method.</p> |
| |
| <h5>x,y</h5> |
| <p>These values define the offset of the pixel.</p> |
| |
| <h5>pixel</h5> |
| <p>return a pixel at the specified (x,y) location.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="QueueCacheViewAuthenticPixels">QueueCacheViewAuthenticPixels</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| PixelPacket *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> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>x,y,columns,rows</h5> |
| <p>These values define the perimeter of a region of pixels.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewStorageClass">SetCacheViewStorageClass</a></h2> |
| <div class="doc-section"> |
| |
| <p>SetCacheViewStorageClass() sets the image storage class associated with the specified view.</p> |
| |
| <p>The format of the SetCacheViewStorageClass method is:</p> |
| |
| <pre class="code"> |
| MagickBooleanType SetCacheViewStorageClass(CacheView *cache_view, |
| const ClassType storage_class) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>storage_class</h5> |
| <p>the image storage class: PseudoClass or DirectClass.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SetCacheViewVirtualPixelMethod">SetCacheViewVirtualPixelMethod</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| MagickBooleanType SetCacheViewVirtualPixelMethod(CacheView *cache_view, |
| const VirtualPixelMethod virtual_pixel_method) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>virtual_pixel_method</h5> |
| <p>the virtual pixel method.</p> |
| |
| </div> |
| <h2><a href="http://www.imagemagick.org/api/MagickCore/cache-view_8c.html" id="SyncCacheViewAuthenticPixels">SyncCacheViewAuthenticPixels</a></h2> |
| <div class="doc-section"> |
| |
| <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="code"> |
| MagickBooleanType SyncCacheViewAuthenticPixels(CacheView *cache_view, |
| ExceptionInfo *exception) |
| </pre> |
| |
| <p>A description of each parameter follows:</p> |
| |
| <h5>cache_view</h5> |
| <p>the cache view.</p> |
| |
| <h5>exception</h5> |
| <p>return any errors or warnings in this structure.</p> |
| |
| </div> |
|
|
| </div>
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