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cache-view.c
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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% CCCC AAA CCCC H H EEEEE %
% C A A C H H E %
% C AAAAA C HHHHH EEE %
% C A A C H H E %
% CCCC A A CCCC H H EEEEE %
% %
% V V IIIII EEEEE W W %
% V V I E W W %
% V V I EEE W W W %
% V V I E WW WW %
% V IIIII EEEEE W W %
% %
% %
% MagickCore Cache View Methods %
% %
% Software Design %
% Cristy %
% February 2000 %
% %
% %
% Copyright 1999-2015 ImageMagick Studio LLC, a non-profit organization %
% dedicated to making software imaging solutions freely available. %
% %
% You may not use this file except in compliance with the License. You may %
% obtain a copy of the License at %
% %
% http://www.imagemagick.org/script/license.php %
% %
% Unless required by applicable law or agreed to in writing, software %
% distributed under the License is distributed on an "AS IS" BASIS, %
% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
% See the License for the specific language governing permissions and %
% limitations under the License. %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
%
*/
/*
Include declarations.
*/
#include "MagickCore/studio.h"
#include "MagickCore/cache.h"
#include "MagickCore/cache-private.h"
#include "MagickCore/cache-view.h"
#include "MagickCore/memory_.h"
#include "MagickCore/memory-private.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/resource_.h"
#include "MagickCore/string_.h"
#include "MagickCore/thread-private.h"
/*
Typedef declarations.
*/
struct _CacheView
{
Image
*image;
VirtualPixelMethod
virtual_pixel_method;
size_t
number_threads;
NexusInfo
**nexus_info;
MagickBooleanType
debug;
size_t
signature;
};
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e A u t h e n t i c C a c h e V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AcquireAuthenticCacheView() acquires an authentic view into the pixel cache.
% It always succeeds but may return a warning or informational exception.
%
% The format of the AcquireAuthenticCacheView method is:
%
% CacheView *AcquireAuthenticCacheView(const Image *image,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport CacheView *AcquireAuthenticCacheView(const Image *image,
ExceptionInfo *exception)
{
CacheView
*restrict cache_view;
cache_view=AcquireVirtualCacheView(image,exception);
(void) SyncImagePixelCache(cache_view->image,exception);
return(cache_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A c q u i r e V i r t u a l C a c h e V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the AcquireVirtualCacheView method is:
%
% CacheView *AcquireVirtualCacheView(const Image *image,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport CacheView *AcquireVirtualCacheView(const Image *image,
ExceptionInfo *exception)
{
CacheView
*restrict cache_view;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
(void) exception;
cache_view=(CacheView *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*cache_view)));
if (cache_view == (CacheView *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(cache_view,0,sizeof(*cache_view));
cache_view->image=ReferenceImage((Image *) image);
cache_view->number_threads=GetOpenMPMaximumThreads();
if (GetMagickResourceLimit(ThreadResource) > cache_view->number_threads)
cache_view->number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
if (cache_view->number_threads == 0)
cache_view->number_threads=1;
cache_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
cache_view->virtual_pixel_method=GetImageVirtualPixelMethod(image);
cache_view->debug=IsEventLogging();
cache_view->signature=MagickCoreSignature;
if (cache_view->nexus_info == (NexusInfo **) NULL)
ThrowFatalException(CacheFatalError,"UnableToAcquireCacheView");
return(cache_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C l o n e C a c h e V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CloneCacheView() makes an exact copy of the specified cache view.
%
% The format of the CloneCacheView method is:
%
% CacheView *CloneCacheView(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport CacheView *CloneCacheView(const CacheView *cache_view)
{
CacheView
*restrict clone_view;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
clone_view=(CacheView *) MagickAssumeAligned(AcquireAlignedMemory(1,
sizeof(*clone_view)));
if (clone_view == (CacheView *) NULL)
ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
(void) ResetMagickMemory(clone_view,0,sizeof(*clone_view));
clone_view->image=ReferenceImage(cache_view->image);
clone_view->number_threads=cache_view->number_threads;
clone_view->nexus_info=AcquirePixelCacheNexus(cache_view->number_threads);
clone_view->virtual_pixel_method=cache_view->virtual_pixel_method;
clone_view->debug=cache_view->debug;
clone_view->signature=MagickCoreSignature;
return(clone_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% D e s t r o y C a c h e V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DestroyCacheView() destroys the specified view returned by a previous call
% to AcquireCacheView().
%
% The format of the DestroyCacheView method is:
%
% CacheView *DestroyCacheView(CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport CacheView *DestroyCacheView(CacheView *cache_view)
{
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
if (cache_view->nexus_info != (NexusInfo **) NULL)
cache_view->nexus_info=DestroyPixelCacheNexus(cache_view->nexus_info,
cache_view->number_threads);
cache_view->image=DestroyImage(cache_view->image);
cache_view->signature=(~MagickCoreSignature);
cache_view=(CacheView *) RelinquishAlignedMemory(cache_view);
return(cache_view);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w A u t h e n t i c P i x e l s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the GetCacheViewAuthenticPixels method is:
%
% Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
% const ssize_t x,const ssize_t y,const size_t columns,
% const size_t rows,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y,columns,rows: These values define the perimeter of a region of
% pixels.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Quantum *GetCacheViewAuthenticPixels(CacheView *cache_view,
const ssize_t x,const ssize_t y,const size_t columns,const size_t rows,
ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
Quantum
*restrict pixels;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
pixels=GetAuthenticPixelCacheNexus(cache_view->image,x,y,columns,rows,
cache_view->nexus_info[id],exception);
return(pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w A u t h e n t i c M e t a c o n t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewAuthenticMetacontent() returns the meta-content corresponding
% with the last call to SetCacheViewIndexes() or
% GetCacheViewAuthenticMetacontent(). The meta-content are authentic and can
% be updated.
%
% The format of the GetCacheViewAuthenticMetacontent() method is:
%
% void *GetCacheViewAuthenticMetacontent(CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport void *GetCacheViewAuthenticMetacontent(CacheView *cache_view)
{
const int
id = GetOpenMPThreadId();
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(cache_view->image->cache != (Cache) NULL);
assert(id < (int) cache_view->number_threads);
return(cache_view->nexus_info[id]->metacontent);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w A u t h e n t i c P i x e l Q u e u e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewAuthenticPixelQueue() returns the pixels associated with the
% last call to QueueCacheViewAuthenticPixels() or
% GetCacheViewAuthenticPixels(). The pixels are authentic and therefore can be
% updated.
%
% The format of the GetCacheViewAuthenticPixelQueue() method is:
%
% Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport Quantum *GetCacheViewAuthenticPixelQueue(CacheView *cache_view)
{
const int
id = GetOpenMPThreadId();
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(cache_view->image->cache != (Cache) NULL);
assert(id < (int) cache_view->number_threads);
return(cache_view->nexus_info[id]->pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w C o l o r s p a c e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewColorspace() returns the image colorspace associated with the
% specified view.
%
% The format of the GetCacheViewColorspace method is:
%
% ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport ColorspaceType GetCacheViewColorspace(const CacheView *cache_view)
{
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
return(GetPixelCacheColorspace(cache_view->image->cache));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G e t C a c h e V i e w E x t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewExtent() returns the extent of the pixels associated with the
% last call to QueueCacheViewAuthenticPixels() or
% GetCacheViewAuthenticPixels().
%
% The format of the GetCacheViewExtent() method is:
%
% MagickSizeType GetCacheViewExtent(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport MagickSizeType GetCacheViewExtent(const CacheView *cache_view)
{
const int
id = GetOpenMPThreadId();
MagickSizeType
extent;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
assert(cache_view->image->cache != (Cache) NULL);
assert(id < (int) cache_view->number_threads);
extent=GetPixelCacheNexusExtent(cache_view->image->cache,
cache_view->nexus_info[id]);
return(extent);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewImage() returns the image associated with the specified view.
%
% The format of the GetCacheViewImage method is:
%
% const Image *GetCacheViewImage(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport const Image *GetCacheViewImage(const CacheView *cache_view)
{
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
return(cache_view->image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w S t o r a g e C l a s s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewStorageClass() returns the image storage class associated with
% the specified view.
%
% The format of the GetCacheViewStorageClass method is:
%
% ClassType GetCacheViewStorageClass(const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport ClassType GetCacheViewStorageClass(const CacheView *cache_view)
{
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
if (cache_view->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
cache_view->image->filename);
return(GetPixelCacheStorageClass(cache_view->image->cache));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w V i r t u a l M e t a c o n t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewVirtualMetacontent() returns the meta-content corresponding
% with the last call to GetCacheViewVirtualMetacontent(). The meta-content
% is virtual and therefore cannot be updated.
%
% The format of the GetCacheViewVirtualMetacontent() method is:
%
% const void *GetCacheViewVirtualMetacontent(
% const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport const void *GetCacheViewVirtualMetacontent(
const CacheView *cache_view)
{
const int
id = GetOpenMPThreadId();
const void
*restrict metacontent;
assert(cache_view != (const CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(cache_view->image->cache != (Cache) NULL);
assert(id < (int) cache_view->number_threads);
metacontent=GetVirtualMetacontentFromNexus(cache_view->image->cache,
cache_view->nexus_info[id]);
return(metacontent);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w V i r t u a l P i x e l Q u e u e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetCacheViewVirtualPixelQueue() returns the the pixels associated with
% the last call to GetCacheViewVirtualPixels(). The pixels are virtual
% and therefore cannot be updated.
%
% The format of the GetCacheViewVirtualPixelQueue() method is:
%
% const Quantum *GetCacheViewVirtualPixelQueue(
% const CacheView *cache_view)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
*/
MagickExport const Quantum *GetCacheViewVirtualPixelQueue(
const CacheView *cache_view)
{
const int
id = GetOpenMPThreadId();
const Quantum
*restrict pixels;
assert(cache_view != (const CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(cache_view->image->cache != (Cache) NULL);
assert(id < (int) cache_view->number_threads);
pixels=GetVirtualPixelsNexus(cache_view->image->cache,
cache_view->nexus_info[id]);
return(pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t C a c h e V i e w V i r t u a l P i x e l s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the GetCacheViewVirtualPixels method is:
%
% 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)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y,columns,rows: These values define the perimeter of a region of
% pixels.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport 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)
{
const int
id = GetOpenMPThreadId();
const Quantum
*restrict pixels;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
pixels=GetVirtualPixelsFromNexus(cache_view->image,
cache_view->virtual_pixel_method,x,y,columns,rows,
cache_view->nexus_info[id],exception);
return(pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t O n e C a c h e V i e w A u t h e n t i c P i x e l %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetOneCacheViewAuthenticPixel() returns a single pixel at the specified (x,y)
% location. The image background color is returned if an error occurs.
%
% The format of the GetOneCacheViewAuthenticPixel method is:
%
% MagickBooleaNType GetOneCacheViewAuthenticPixel(
% const CacheView *cache_view,const ssize_t x,const ssize_t y,
% Quantum *pixel,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y: These values define the offset of the pixel.
%
% o pixel: return a pixel at the specified (x,y) location.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetOneCacheViewAuthenticPixel(
const CacheView *cache_view,const ssize_t x,const ssize_t y,Quantum *pixel,
ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
Quantum
*restrict q;
register ssize_t
i;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
(void) memset(pixel,0,MaxPixelChannels*sizeof(*pixel));
q=GetAuthenticPixelCacheNexus(cache_view->image,x,y,1,1,
cache_view->nexus_info[id],exception);
if (q == (const Quantum *) NULL)
{
PixelInfo
background_color;
background_color=cache_view->image->background_color;
pixel[RedPixelChannel]=ClampToQuantum(background_color.red);
pixel[GreenPixelChannel]=ClampToQuantum(background_color.green);
pixel[BluePixelChannel]=ClampToQuantum(background_color.blue);
pixel[BlackPixelChannel]=ClampToQuantum(background_color.black);
pixel[AlphaPixelChannel]=ClampToQuantum(background_color.alpha);
return(MagickFalse);
}
for (i=0; i < (ssize_t) GetPixelChannels(cache_view->image); i++)
{
PixelChannel channel=GetPixelChannelChannel(cache_view->image,i);
pixel[channel]=q[i];
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t O n e C a c h e V i e w V i r t u a l P i x e l %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the GetOneCacheViewVirtualPixel method is:
%
% MagickBooleanType GetOneCacheViewVirtualPixel(
% const CacheView *cache_view,const ssize_t x,const ssize_t y,
% Quantum *pixel,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y: These values define the offset of the pixel.
%
% o pixel: return a pixel at the specified (x,y) location.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetOneCacheViewVirtualPixel(
const CacheView *cache_view,const ssize_t x,const ssize_t y,Quantum *pixel,
ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
register const Quantum
*restrict p;
register ssize_t
i;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
(void) memset(pixel,0,MaxPixelChannels*sizeof(*pixel));
p=GetVirtualPixelsFromNexus(cache_view->image,
cache_view->virtual_pixel_method,x,y,1,1,cache_view->nexus_info[id],
exception);
if (p == (const Quantum *) NULL)
{
PixelInfo
background_color;
background_color=cache_view->image->background_color;
pixel[RedPixelChannel]=ClampToQuantum(background_color.red);
pixel[GreenPixelChannel]=ClampToQuantum(background_color.green);
pixel[BluePixelChannel]=ClampToQuantum(background_color.blue);
pixel[BlackPixelChannel]=ClampToQuantum(background_color.black);
pixel[AlphaPixelChannel]=ClampToQuantum(background_color.alpha);
return(MagickFalse);
}
for (i=0; i < (ssize_t) GetPixelChannels(cache_view->image); i++)
{
PixelChannel channel=GetPixelChannelChannel(cache_view->image,i);
pixel[channel]=p[i];
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t O n e C a c h e V i e w V i r t u a l P i x e l I n f o %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the GetOneCacheViewVirtualPixelInfo method is:
%
% MagickBooleanType GetOneCacheViewVirtualPixelInfo(
% const CacheView *cache_view,const ssize_t x,const ssize_t y,
% PixelInfo *pixel,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y: These values define the offset of the pixel.
%
% o pixel: return a pixel at the specified (x,y) location.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetOneCacheViewVirtualPixelInfo(
const CacheView *cache_view,const ssize_t x,const ssize_t y,PixelInfo *pixel,
ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
register const Quantum
*restrict p;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
GetPixelInfo(cache_view->image,pixel);
p=GetVirtualPixelsFromNexus(cache_view->image,
cache_view->virtual_pixel_method,x,y,1,1,cache_view->nexus_info[id],
exception);
if (p == (const Quantum *) NULL)
return(MagickFalse);
GetPixelInfoPixel(cache_view->image,p,pixel);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t O n e C a c h e V i e w V i r t u a l P i x e l %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the GetOneCacheViewVirtualPixel method is:
%
% MagickBooleanType GetOneCacheViewVirtualMethodPixel(
% const CacheView *cache_view,
% const VirtualPixelMethod virtual_pixel_method,const ssize_t x,
% const ssize_t y,Quantum *pixel,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o virtual_pixel_method: the virtual pixel method.
%
% o x,y: These values define the offset of the pixel.
%
% o pixel: return a pixel at the specified (x,y) location.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport MagickBooleanType GetOneCacheViewVirtualMethodPixel(
const CacheView *cache_view,const VirtualPixelMethod virtual_pixel_method,
const ssize_t x,const ssize_t y,Quantum *pixel,ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
const Quantum
*restrict p;
register ssize_t
i;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
(void) memset(pixel,0,MaxPixelChannels*sizeof(*pixel));
p=GetVirtualPixelsFromNexus(cache_view->image,virtual_pixel_method,x,y,1,1,
cache_view->nexus_info[id],exception);
if (p == (const Quantum *) NULL)
{
PixelInfo
background_color;
background_color=cache_view->image->background_color;
pixel[RedPixelChannel]=ClampToQuantum(background_color.red);
pixel[GreenPixelChannel]=ClampToQuantum(background_color.green);
pixel[BluePixelChannel]=ClampToQuantum(background_color.blue);
pixel[BlackPixelChannel]=ClampToQuantum(background_color.black);
pixel[AlphaPixelChannel]=ClampToQuantum(background_color.alpha);
return(MagickFalse);
}
for (i=0; i < (ssize_t) GetPixelChannels(cache_view->image); i++)
{
PixelChannel channel=GetPixelChannelChannel(cache_view->image,i);
pixel[channel]=p[i];
}
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% Q u e u e C a c h e V i e w A u t h e n t i c P i x e l s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% 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.
%
% The format of the QueueCacheViewAuthenticPixels method is:
%
% Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
% const ssize_t x,const ssize_t y,const size_t columns,
% const size_t rows,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o cache_view: the cache view.
%
% o x,y,columns,rows: These values define the perimeter of a region of
% pixels.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Quantum *QueueCacheViewAuthenticPixels(CacheView *cache_view,
const ssize_t x,const ssize_t y,const size_t columns,const size_t rows,
ExceptionInfo *exception)
{
const int
id = GetOpenMPThreadId();
Quantum
*restrict pixels;
assert(cache_view != (CacheView *) NULL);
assert(cache_view->signature == MagickCoreSignature);
assert(id < (int) cache_view->number_threads);
pixels=QueueAuthenticPixelCacheNexus(cache_view->image,x,y,columns,rows,
MagickFalse,cache_view->nexus_info[id],exception);
return(pixels);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S e t C a c h e V i e w S t o r a g e C l a s s %
% %
% %