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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#GetCacheViewChannels" > GetCacheViewChannels< / a > • < a href = "cache-view.html#GetCacheViewColorspace" > GetCacheViewColorspace< / a > • < a href = "cache-view.html#GetCacheViewException" > GetCacheViewException< / a > • < a href = "cache-view.html#GetCacheViewStorageClass" > GetCacheViewStorageClass< / a > • < a href = "cache-view.html#GetCacheViewAuthenticPixels" > GetCacheViewAuthenticPixels< / a > • < a href = "cache-view.html#GetOneCacheViewAuthenticPixel" > GetOneCacheViewAuthenticPixel< / a > • < a href = "cache-view.html#GetCacheViewAuthenticIndexQueue" > GetCacheViewAuthenticIndexQueue< / a > • < a href = "cache-view.html#GetCacheViewAuthenticPixelQueue" > GetCacheViewAuthenticPixelQueue< / a > • < a href = "cache-view.html#GetCacheViewVirtualIndexQueue" > GetCacheViewVirtualIndexQueue< / a > • < a href = "cache-view.html#GetCacheViewVirtualPixelQueue" > GetCacheViewVirtualPixelQueue< / a > • < a href = "cache-view.html#GetCacheViewVirtualPixels" > GetCacheViewVirtualPixels< / a > • < a href = "cache-view.html#GetOneCacheViewVirtualPixel" > GetOneCacheViewVirtualPixel< / 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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "AcquireAuthenticCacheView" > AcquireAuthenticCacheView< / a > < / h2 >
< p > AcquireAuthenticCacheView() acquires an authentic view into the pixel cache.< / 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 = "https://legacy.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.< / 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 = "https://legacy.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 = "https://legacy.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 AcquireVirtualCacheView().< / 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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "GetCacheViewChannels" > GetCacheViewChannels< / a > < / h2 >
< p > GetCacheViewChannels() returns the image pixel channels associated with the specified view.< / p >
< p > The format of the GetCacheViewChannels method is:< / p >
< pre class = "text" >
size_t GetCacheViewChannels(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 = "https://legacy.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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "GetCacheViewException" > GetCacheViewException< / a > < / h2 >
< p > GetCacheViewException() returns the image exception associated with the specified view.< / p >
< p > The format of the GetCacheViewException method is:< / p >
< pre class = "text" >
ExceptionInfo GetCacheViewException(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 = "https://legacy.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 = "https://legacy.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" >
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 >
< 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 >
< / dl >
< h2 > < a href = "https://legacy.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,
PixelPacket *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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "GetCacheViewAuthenticIndexQueue" > GetCacheViewAuthenticIndexQueue< / a > < / h2 >
< 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 = "text" >
IndexPacket *GetCacheViewAuthenticIndexQueue(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 = "https://legacy.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" >
PixelPacket *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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "GetCacheViewVirtualIndexQueue" > GetCacheViewVirtualIndexQueue< / a > < / h2 >
< 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 = "text" >
const IndexPacket *GetCacheViewVirtualIndexQueue(
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 = "https://legacy.imagemagick.org/api/MagickCore/cache-view_8c.html" id = "GetCacheViewVirtualPixelQueue" > GetCacheViewVirtualPixelQueue< / a > < / h2 >
< p > GetCacheViewVirtualPixelQueue() returns 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 PixelPacket *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 = "https://legacy.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 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 >
< 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 = "https://legacy.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,
PixelPacket *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 = "https://legacy.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,PixelPacket *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 = "https://legacy.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" >
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 >
< 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 = "https://legacy.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)
< / 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 >
< / dl >
< h2 > < a href = "https://legacy.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 = "https://legacy.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 >
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