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wand-view.c
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% W W AAA N N DDDD %
% W W A A NN N D D %
% W W W AAAAA N N N D D %
% WW WW A A N NN D D %
% W W A A N N DDDD %
% %
% 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 %
% %
% %
% MagickWand Wand View Methods %
% %
% Software Design %
% Cristy %
% March 2003 %
% %
% %
% Copyright @ 1999 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 %
% %
% https://imagemagick.org/license/ %
% %
% 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 "MagickWand/studio.h"
#include "MagickWand/MagickWand.h"
#include "MagickWand/magick-wand-private.h"
#include "MagickWand/wand.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/thread-private.h"
/*
Define declarations.
*/
#define WandViewId "WandView"
␌
/*
Typedef declarations.
*/
struct _WandView
{
size_t
id;
char
name[MagickPathExtent],
*description;
RectangleInfo
extent;
MagickWand
*wand;
CacheView
*view;
Image
*image;
PixelWand
***pixel_wands;
ExceptionInfo
*exception;
MagickBooleanType
debug;
size_t
signature;
};
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C l o n e W a n d V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CloneWandView() makes a copy of the specified wand view.
%
% The format of the CloneWandView method is:
%
% WandView *CloneWandView(const WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
WandExport WandView *CloneWandView(const WandView *wand_view)
{
ssize_t
i;
WandView
*clone_view;
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
if (wand_view->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",wand_view->name);
clone_view=(WandView *) AcquireCriticalMemory(sizeof(*clone_view));
(void) memset(clone_view,0,sizeof(*clone_view));
clone_view->id=AcquireWandId();
(void) FormatLocaleString(clone_view->name,MagickPathExtent,"%s-%.17g",
WandViewId,(double) clone_view->id);
clone_view->description=ConstantString(wand_view->description);
clone_view->image=CloneImage(wand_view->image,0,0,MagickTrue,
wand_view->exception);
clone_view->view=CloneCacheView(wand_view->view);
clone_view->extent=wand_view->extent;
clone_view->exception=AcquireExceptionInfo();
InheritException(clone_view->exception,wand_view->exception);
for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
clone_view->pixel_wands[i]=ClonePixelWands((const PixelWand **)
wand_view->pixel_wands[i],wand_view->extent.width);
clone_view->debug=wand_view->debug;
if (clone_view->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",clone_view->name);
clone_view->signature=MagickWandSignature;
return(clone_view);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% D e s t r o y W a n d V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DestroyWandView() deallocates memory associated with a wand view.
%
% The format of the DestroyWandView method is:
%
% WandView *DestroyWandView(WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
static PixelWand ***DestroyPixelsTLS(PixelWand ***pixel_wands,
const size_t number_wands)
{
ssize_t
i;
assert(pixel_wands != (PixelWand ***) NULL);
for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
if (pixel_wands[i] != (PixelWand **) NULL)
pixel_wands[i]=DestroyPixelWands(pixel_wands[i],number_wands);
pixel_wands=(PixelWand ***) RelinquishMagickMemory(pixel_wands);
return(pixel_wands);
}
WandExport WandView *DestroyWandView(WandView *wand_view)
{
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
wand_view->pixel_wands=DestroyPixelsTLS(wand_view->pixel_wands,
wand_view->extent.width);
wand_view->view=DestroyCacheView(wand_view->view);
wand_view->exception=DestroyExceptionInfo(wand_view->exception);
wand_view->signature=(~MagickWandSignature);
RelinquishWandId(wand_view->id);
wand_view=(WandView *) RelinquishMagickMemory(wand_view);
return(wand_view);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% D u p l e x T r a n s f e r W a n d V i e w I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DuplexTransferWandViewIterator() iterates over three wand views in
% parallel and calls your transfer method for each scanline of the view. The
% source and duplex pixel extent is not confined to the image canvas-- that is
% you can include negative offsets or widths or heights that exceed the image
% dimension. However, the destination wand view is confined to the image
% canvas-- that is no negative offsets or widths or heights that exceed the
% image dimension are permitted.
%
% The callback signature is:
%
% MagickBooleanType DuplexTransferImageViewMethod(const WandView *source,
% const WandView *duplex,WandView *destination,const ssize_t y,
% const int thread_id,void *context)
%
% Use this pragma if the view is not single threaded:
%
% #pragma omp critical
%
% to define a section of code in your callback transfer method that must be
% executed by a single thread at a time.
%
% The format of the DuplexTransferWandViewIterator method is:
%
% MagickBooleanType DuplexTransferWandViewIterator(WandView *source,
% WandView *duplex,WandView *destination,
% DuplexTransferWandViewMethod transfer,void *context)
%
% A description of each parameter follows:
%
% o source: the source wand view.
%
% o duplex: the duplex wand view.
%
% o destination: the destination wand view.
%
% o transfer: the transfer callback method.
%
% o context: the user defined context.
%
*/
WandExport MagickBooleanType DuplexTransferWandViewIterator(WandView *source,
WandView *duplex,WandView *destination,DuplexTransferWandViewMethod transfer,
void *context)
{
Image
*destination_image,
*source_image;
MagickBooleanType
status;
MagickOffsetType
progress;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
size_t
height;
#endif
ssize_t
y;
assert(source != (WandView *) NULL);
assert(source->signature == MagickWandSignature);
if (transfer == (DuplexTransferWandViewMethod) NULL)
return(MagickFalse);
source_image=source->wand->images;
destination_image=destination->wand->images;
status=SetImageStorageClass(destination_image,DirectClass,
destination->exception);
if (status == MagickFalse)
return(MagickFalse);
status=MagickTrue;
progress=0;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
height=(size_t) ((ssize_t) source->extent.height-source->extent.y);
#pragma omp parallel for schedule(static) shared(progress,status) \
magick_number_threads(source_image,destination_image,height,1)
#endif
for (y=source->extent.y; y < (ssize_t) source->extent.height; y++)
{
const int
id = GetOpenMPThreadId();
MagickBooleanType
sync;
const Quantum
*magick_restrict duplex_pixels,
*magick_restrict pixels;
ssize_t
x;
Quantum
*magick_restrict destination_pixels;
if (status == MagickFalse)
continue;
pixels=GetCacheViewVirtualPixels(source->view,source->extent.x,y,
source->extent.width,1,source->exception);
if (pixels == (const Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) source->extent.width; x++)
{
PixelSetQuantumPixel(source->image,pixels,source->pixel_wands[id][x]);
pixels+=(ptrdiff_t) GetPixelChannels(source->image);
}
duplex_pixels=GetCacheViewVirtualPixels(duplex->view,duplex->extent.x,y,
duplex->extent.width,1,duplex->exception);
if (duplex_pixels == (const Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) duplex->extent.width; x++)
{
PixelSetQuantumPixel(duplex->image,duplex_pixels,
duplex->pixel_wands[id][x]);
duplex_pixels+=(ptrdiff_t) GetPixelChannels(duplex->image);
}
destination_pixels=GetCacheViewAuthenticPixels(destination->view,
destination->extent.x,y,destination->extent.width,1,
destination->exception);
if (destination_pixels == (Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) destination->extent.width; x++)
{
PixelSetQuantumPixel(destination->image,destination_pixels,
destination->pixel_wands[id][x]);
destination_pixels+=(ptrdiff_t) GetPixelChannels(destination->image);
}
if (transfer(source,duplex,destination,y,id,context) == MagickFalse)
status=MagickFalse;
destination_pixels=GetCacheViewAuthenticPixels(destination->view,
destination->extent.x,y,destination->extent.width,1,
destination->exception);
for (x=0; x < (ssize_t) destination->extent.width; x++)
{
PixelGetQuantumPixel(destination->image,destination->pixel_wands[id][x],
destination_pixels);
destination_pixels+=(ptrdiff_t) GetPixelChannels(destination->image);
}
sync=SyncCacheViewAuthenticPixels(destination->view,destination->exception);
if (sync == MagickFalse)
status=MagickFalse;
if (source_image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp atomic
#endif
progress++;
proceed=SetImageProgress(source_image,source->description,progress,
source->extent.height);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
return(status);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t W a n d V i e w E x c e p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetWandViewException() returns the severity, reason, and description of any
% error that occurs when utilizing a wand view.
%
% The format of the GetWandViewException method is:
%
% char *GetWandViewException(const WandView *wand_view,
% ExceptionType *severity)
%
% A description of each parameter follows:
%
% o wand_view: the pixel wand_view.
%
% o severity: the severity of the error is returned here.
%
*/
WandExport char *GetWandViewException(const WandView *wand_view,
ExceptionType *severity)
{
char
*description;
assert(wand_view != (const WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
if (wand_view->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",wand_view->name);
assert(severity != (ExceptionType *) NULL);
*severity=wand_view->exception->severity;
description=(char *) AcquireQuantumMemory(2UL*MagickPathExtent,
sizeof(*description));
if (description == (char *) NULL)
ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
wand_view->name);
*description='\0';
if (wand_view->exception->reason != (char *) NULL)
(void) CopyMagickString(description,GetLocaleExceptionMessage(
wand_view->exception->severity,wand_view->exception->reason),
MagickPathExtent);
if (wand_view->exception->description != (char *) NULL)
{
(void) ConcatenateMagickString(description," (",MagickPathExtent);
(void) ConcatenateMagickString(description,GetLocaleExceptionMessage(
wand_view->exception->severity,wand_view->exception->description),
MagickPathExtent);
(void) ConcatenateMagickString(description,")",MagickPathExtent);
}
return(description);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t W a n d V i e w E x t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetWandViewExtent() returns the wand view extent.
%
% The format of the GetWandViewExtent method is:
%
% RectangleInfo GetWandViewExtent(const WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
WandExport RectangleInfo GetWandViewExtent(const WandView *wand_view)
{
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
return(wand_view->extent);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t W a n d V i e w I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetWandViewIterator() iterates over the wand view in parallel and calls
% your get method for each scanline of the view. The pixel extent is
% not confined to the image canvas-- that is you can include negative offsets
% or widths or heights that exceed the image dimension. Any updates to
% the pixels in your callback are ignored.
%
% The callback signature is:
%
% MagickBooleanType GetImageViewMethod(const WandView *source,
% const ssize_t y,const int thread_id,void *context)
%
% Use this pragma if the view is not single threaded:
%
% #pragma omp critical
%
% to define a section of code in your callback get method that must be
% executed by a single thread at a time.
%
% The format of the GetWandViewIterator method is:
%
% MagickBooleanType GetWandViewIterator(WandView *source,
% GetWandViewMethod get,void *context)
%
% A description of each parameter follows:
%
% o source: the source wand view.
%
% o get: the get callback method.
%
% o context: the user defined context.
%
*/
WandExport MagickBooleanType GetWandViewIterator(WandView *source,
GetWandViewMethod get,void *context)
{
Image
*source_image;
MagickBooleanType
status;
MagickOffsetType
progress;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
size_t
height;
#endif
ssize_t
y;
assert(source != (WandView *) NULL);
assert(source->signature == MagickWandSignature);
if (get == (GetWandViewMethod) NULL)
return(MagickFalse);
source_image=source->wand->images;
status=MagickTrue;
progress=0;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
height=(size_t) ((ssize_t) source->extent.height-source->extent.y);
#pragma omp parallel for schedule(static) shared(progress,status) \
magick_number_threads(source_image,source_image,height,1)
#endif
for (y=source->extent.y; y < (ssize_t) source->extent.height; y++)
{
const int
id = GetOpenMPThreadId();
const Quantum
*pixels;
ssize_t
x;
if (status == MagickFalse)
continue;
pixels=GetCacheViewVirtualPixels(source->view,source->extent.x,y,
source->extent.width,1,source->exception);
if (pixels == (const Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) source->extent.width; x++)
{
PixelSetQuantumPixel(source->image,pixels,source->pixel_wands[id][x]);
pixels+=(ptrdiff_t) GetPixelChannels(source->image);
}
if (get(source,y,id,context) == MagickFalse)
status=MagickFalse;
if (source_image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp atomic
#endif
progress++;
proceed=SetImageProgress(source_image,source->description,progress,
source->extent.height);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
return(status);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t W a n d V i e w P i x e l s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetWandViewPixels() returns the wand view pixel_wands.
%
% The format of the GetWandViewPixels method is:
%
% PixelWand *GetWandViewPixels(const WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
WandExport PixelWand **GetWandViewPixels(const WandView *wand_view)
{
const int
id = GetOpenMPThreadId();
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
return(wand_view->pixel_wands[id]);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% G e t W a n d V i e w W a n d %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GetWandViewWand() returns the magick wand associated with the wand view.
%
% The format of the GetWandViewWand method is:
%
% MagickWand *GetWandViewWand(const WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
WandExport MagickWand *GetWandViewWand(const WandView *wand_view)
{
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
return(wand_view->wand);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s W a n d V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsWandView() returns MagickTrue if the parameter is verified as a wand
% view object.
%
% The format of the IsWandView method is:
%
% MagickBooleanType IsWandView(const WandView *wand_view)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
*/
WandExport MagickBooleanType IsWandView(const WandView *wand_view)
{
size_t
length;
if (wand_view == (const WandView *) NULL)
return(MagickFalse);
if (wand_view->signature != MagickWandSignature)
return(MagickFalse);
length=strlen(WandViewId);
if (LocaleNCompare(wand_view->name,WandViewId,length) != 0)
return(MagickFalse);
return(MagickTrue);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% N e w W a n d V i e w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% NewWandView() returns a wand view required for all other methods in the
% Wand View API.
%
% The format of the NewWandView method is:
%
% WandView *NewWandView(MagickWand *wand)
%
% A description of each parameter follows:
%
% o wand: the wand.
%
*/
static PixelWand ***AcquirePixelsTLS(const size_t number_wands)
{
PixelWand
***pixel_wands;
size_t
number_threads;
ssize_t
i;
number_threads=GetOpenMPMaximumThreads();
pixel_wands=(PixelWand ***) AcquireQuantumMemory(number_threads,
sizeof(*pixel_wands));
if (pixel_wands == (PixelWand ***) NULL)
return((PixelWand ***) NULL);
(void) memset(pixel_wands,0,number_threads*sizeof(*pixel_wands));
for (i=0; i < (ssize_t) number_threads; i++)
{
pixel_wands[i]=NewPixelWands(number_wands);
if (pixel_wands[i] == (PixelWand **) NULL)
return(DestroyPixelsTLS(pixel_wands,number_wands));
}
return(pixel_wands);
}
WandExport WandView *NewWandView(MagickWand *wand)
{
ExceptionInfo
*exception;
WandView
*wand_view;
assert(wand != (MagickWand *) NULL);
assert(wand->signature == MagickWandSignature);
wand_view=(WandView *) AcquireCriticalMemory(sizeof(*wand_view));
(void) memset(wand_view,0,sizeof(*wand_view));
wand_view->id=AcquireWandId();
(void) FormatLocaleString(wand_view->name,MagickPathExtent,"%s-%.17g",
WandViewId,(double) wand_view->id);
wand_view->description=ConstantString("WandView");
wand_view->wand=wand;
exception=AcquireExceptionInfo();
wand_view->view=AcquireVirtualCacheView(wand_view->wand->images,exception);
wand_view->image=(Image *) GetCacheViewImage(wand_view->view);
wand_view->extent.width=wand_view->image->columns;
wand_view->extent.height=wand_view->image->rows;
wand_view->pixel_wands=AcquirePixelsTLS(wand_view->extent.width);
wand_view->exception=exception;
if (wand_view->pixel_wands == (PixelWand ***) NULL)
ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
(char *) NULL);
wand_view->debug=IsEventLogging();
wand_view->signature=MagickWandSignature;
return(wand_view);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% N e w W a n d V i e w E x t e n t %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% NewWandViewExtent() returns a wand view required for all other methods
% in the Wand View API.
%
% The format of the NewWandViewExtent method is:
%
% WandView *NewWandViewExtent(MagickWand *wand,const ssize_t x,
% const ssize_t y,const size_t width,const size_t height)
%
% A description of each parameter follows:
%
% o wand: the magick wand.
%
% o x,y,columns,rows: These values define the perimeter of a extent of
% pixel_wands view.
%
*/
WandExport WandView *NewWandViewExtent(MagickWand *wand,const ssize_t x,
const ssize_t y,const size_t width,const size_t height)
{
ExceptionInfo
*exception;
WandView
*wand_view;
assert(wand != (MagickWand *) NULL);
assert(wand->signature == MagickWandSignature);
wand_view=(WandView *) AcquireCriticalMemory(sizeof(*wand_view));
(void) memset(wand_view,0,sizeof(*wand_view));
wand_view->id=AcquireWandId();
(void) FormatLocaleString(wand_view->name,MagickPathExtent,"%s-%.17g",
WandViewId,(double) wand_view->id);
wand_view->description=ConstantString("WandView");
exception=AcquireExceptionInfo();
wand_view->view=AcquireVirtualCacheView(wand_view->wand->images,exception);
wand_view->wand=wand;
wand_view->extent.width=width;
wand_view->extent.height=height;
wand_view->extent.x=x;
wand_view->extent.y=y;
wand_view->exception=exception;
wand_view->pixel_wands=AcquirePixelsTLS(wand_view->extent.width);
if (wand_view->pixel_wands == (PixelWand ***) NULL)
ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
(char *) NULL);
wand_view->debug=IsEventLogging();
wand_view->signature=MagickWandSignature;
return(wand_view);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S e t W a n d V i e w D e s c r i p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetWandViewDescription() associates a description with an image view.
%
% The format of the SetWandViewDescription method is:
%
% void SetWandViewDescription(WandView *image_view,const char *description)
%
% A description of each parameter follows:
%
% o wand_view: the wand view.
%
% o description: the wand view description.
%
*/
MagickExport void SetWandViewDescription(WandView *wand_view,
const char *description)
{
assert(wand_view != (WandView *) NULL);
assert(wand_view->signature == MagickWandSignature);
wand_view->description=ConstantString(description);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S e t W a n d V i e w I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SetWandViewIterator() iterates over the wand view in parallel and calls
% your set method for each scanline of the view. The pixel extent is
% confined to the image canvas-- that is no negative offsets or widths or
% heights that exceed the image dimension. The pixels are initially
% undefined and any settings you make in the callback method are automagically
% synced back to your image.
%
% The callback signature is:
%
% MagickBooleanType SetImageViewMethod(ImageView *destination,
% const ssize_t y,const int thread_id,void *context)
%
% Use this pragma if the view is not single threaded:
%
% #pragma omp critical
%
% to define a section of code in your callback set method that must be
% executed by a single thread at a time.
%
% The format of the SetWandViewIterator method is:
%
% MagickBooleanType SetWandViewIterator(WandView *destination,
% SetWandViewMethod set,void *context)
%
% A description of each parameter follows:
%
% o destination: the wand view.
%
% o set: the set callback method.
%
% o context: the user defined context.
%
*/
WandExport MagickBooleanType SetWandViewIterator(WandView *destination,
SetWandViewMethod set,void *context)
{
Image
*destination_image;
MagickBooleanType
status;
MagickOffsetType
progress;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
size_t
height;
#endif
ssize_t
y;
assert(destination != (WandView *) NULL);
assert(destination->signature == MagickWandSignature);
if (set == (SetWandViewMethod) NULL)
return(MagickFalse);
destination_image=destination->wand->images;
status=SetImageStorageClass(destination_image,DirectClass,
destination->exception);
if (status == MagickFalse)
return(MagickFalse);
status=MagickTrue;
progress=0;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
height=(size_t) ((ssize_t) destination->extent.height-destination->extent.y);
#pragma omp parallel for schedule(static) shared(progress,status) \
magick_number_threads(destination_image,destination_image,height,1)
#endif
for (y=destination->extent.y; y < (ssize_t) destination->extent.height; y++)
{
const int
id = GetOpenMPThreadId();
MagickBooleanType
sync;
Quantum
*magick_restrict pixels;
ssize_t
x;
if (status == MagickFalse)
continue;
pixels=GetCacheViewAuthenticPixels(destination->view,destination->extent.x,
y,destination->extent.width,1,destination->exception);
if (pixels == (Quantum *) NULL)
{
status=MagickFalse;
continue;
}
if (set(destination,y,id,context) == MagickFalse)
status=MagickFalse;
for (x=0; x < (ssize_t) destination->extent.width; x++)
{
PixelGetQuantumPixel(destination->image,destination->pixel_wands[id][x],
pixels);
pixels+=(ptrdiff_t) GetPixelChannels(destination->image);
}
sync=SyncCacheViewAuthenticPixels(destination->view,destination->exception);
if (sync == MagickFalse)
status=MagickFalse;
if (destination_image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp atomic
#endif
progress++;
proceed=SetImageProgress(destination_image,destination->description,
progress,destination->extent.height);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
return(status);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s f e r W a n d V i e w I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransferWandViewIterator() iterates over two wand views in parallel and
% calls your transfer method for each scanline of the view. The source pixel
% extent is not confined to the image canvas-- that is you can include
% negative offsets or widths or heights that exceed the image dimension.
% However, the destination wand view is confined to the image canvas-- that
% is no negative offsets or widths or heights that exceed the image dimension
% are permitted.
%
% The callback signature is:
%
% MagickBooleanType TransferImageViewMethod(const WandView *source,
% WandView *destination,const ssize_t y,const int thread_id,
% void *context)
%
% Use this pragma if the view is not single threaded:
%
% #pragma omp critical
%
% to define a section of code in your callback transfer method that must be
% executed by a single thread at a time.
%
% The format of the TransferWandViewIterator method is:
%
% MagickBooleanType TransferWandViewIterator(WandView *source,
% WandView *destination,TransferWandViewMethod transfer,void *context)
%
% A description of each parameter follows:
%
% o source: the source wand view.
%
% o destination: the destination wand view.
%
% o transfer: the transfer callback method.
%
% o context: the user defined context.
%
*/
WandExport MagickBooleanType TransferWandViewIterator(WandView *source,
WandView *destination,TransferWandViewMethod transfer,void *context)
{
Image
*destination_image,
*source_image;
MagickBooleanType
status;
MagickOffsetType
progress;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
size_t
height;
#endif
ssize_t
y;
assert(source != (WandView *) NULL);
assert(source->signature == MagickWandSignature);
if (transfer == (TransferWandViewMethod) NULL)
return(MagickFalse);
source_image=source->wand->images;
destination_image=destination->wand->images;
status=SetImageStorageClass(destination_image,DirectClass,
destination->exception);
if (status == MagickFalse)
return(MagickFalse);
status=MagickTrue;
progress=0;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
height=(size_t) ((ssize_t) source->extent.height-source->extent.y);
#pragma omp parallel for schedule(static) shared(progress,status) \
magick_number_threads(source_image,destination_image,height,1)
#endif
for (y=source->extent.y; y < (ssize_t) source->extent.height; y++)
{
const int
id = GetOpenMPThreadId();
const Quantum
*magick_restrict pixels;
MagickBooleanType
sync;
Quantum
*magick_restrict destination_pixels;
ssize_t
x;
if (status == MagickFalse)
continue;
pixels=GetCacheViewVirtualPixels(source->view,source->extent.x,y,
source->extent.width,1,source->exception);
if (pixels == (const Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) source->extent.width; x++)
{
PixelSetQuantumPixel(source->image,pixels,source->pixel_wands[id][x]);
pixels+=(ptrdiff_t) GetPixelChannels(source->image);
}
destination_pixels=GetCacheViewAuthenticPixels(destination->view,
destination->extent.x,y,destination->extent.width,1,
destination->exception);
if (destination_pixels == (Quantum *) NULL)
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) destination->extent.width; x++)
{
PixelSetQuantumPixel(destination->image,destination_pixels,
destination->pixel_wands[id][x]);
destination_pixels+=(ptrdiff_t) GetPixelChannels(destination->image);
}
if (transfer(source,destination,y,id,context) == MagickFalse)
status=MagickFalse;
destination_pixels=GetCacheViewAuthenticPixels(destination->view,
destination->extent.x,y,destination->extent.width,1,
destination->exception);
for (x=0; x < (ssize_t) destination->extent.width; x++)
{
PixelGetQuantumPixel(destination->image,destination->pixel_wands[id][x],
destination_pixels);
destination_pixels+=(ptrdiff_t) GetPixelChannels(destination->image);
}
sync=SyncCacheViewAuthenticPixels(destination->view,destination->exception);
if (sync == MagickFalse)
status=MagickFalse;
if (source_image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp atomic
#endif
progress++;
proceed=SetImageProgress(source_image,source->description,progress,
source->extent.height);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
return(status);
}
␌
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U p d a t e W a n d V i e w I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UpdateWandViewIterator() iterates over the wand view in parallel and calls
% your update method for each scanline of the view. The pixel extent is
% confined to the image canvas-- that is no negative offsets or widths or
% heights that exceed the image dimension are permitted. Updates to pixels
% in your callback are automagically synced back to the image.
%
% The callback signature is:
%
% MagickBooleanType UpdateImageViewMethod(WandView *source,const ssize_t y,
% const int thread_id,void *context)
%
% Use this pragma if the view is not single threaded:
%
% #pragma omp critical
%
% to define a section of code in your callback update method that must be
% executed by a single thread at a time.
%
% The format of the UpdateWandViewIterator method is:
%
% MagickBooleanType UpdateWandViewIterator(WandView *source,
% UpdateWandViewMethod update,void *context)
%
% A description of each parameter follows:
%
% o source: the source wand view.
%
% o update: the update callback method.
%
% o context: the user defined context.
%
*/
WandExport MagickBooleanType UpdateWandViewIterator(WandView *source,
UpdateWandViewMethod update,void *context)
{
Image
*source_image;
MagickBooleanType
status;
MagickOffsetType
progress;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
size_t
height;
#endif
ssize_t
y;
assert(source != (WandView *) NULL);
assert(source->signature == MagickWandSignature);
if (update == (UpdateWandViewMethod) NULL)
return(MagickFalse);
source_image=source->wand->images;
status=SetImageStorageClass(source_image,DirectClass,source->exception);
if (status == MagickFalse)
return(MagickFalse);
status=MagickTrue;
progress=0;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
height=(size_t) ((ssize_t) source->extent.height-source->extent.y);
#pragma omp parallel for schedule(static) shared(progress,status) \
magick_number_threads(source_image,source_image,height,1)
#endif
for (y=source->extent.y; y < (ssize_t) source->extent.height; y++)
{
const int
id = GetOpenMPThreadId();
const Quantum
*magick_restrict p;
MagickBooleanType
sync;
ssize_t
x;
Quantum
*magick_restrict pixels,
*magick_restrict q;
if (status == MagickFalse)
continue;
pixels=GetCacheViewAuthenticPixels(source->view,source->extent.x,y,
source->extent.width,1,source->exception);
if (pixels == (Quantum *) NULL)
{
status=MagickFalse;
continue;
}
p=(const Quantum *) pixels;
for (x=0; x < (ssize_t) source->extent.width; x++)
{
PixelSetQuantumPixel(source->image,p,source->pixel_wands[id][x]);
p+=(ptrdiff_t) GetPixelChannels(source->image);
}
if (update(source,y,id,context) == MagickFalse)
status=MagickFalse;
q=pixels;
for (x=0; x < (ssize_t) source->extent.width; x++)
{
PixelGetQuantumPixel(source->image,source->pixel_wands[id][x],q);
q+=(ptrdiff_t) GetPixelChannels(source->image);
}
sync=SyncCacheViewAuthenticPixels(source->view,source->exception);
if (sync == MagickFalse)
status=MagickFalse;
if (source_image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp atomic
#endif
progress++;
proceed=SetImageProgress(source_image,source->description,progress,
source->extent.height);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
return(status);
}
_WandView
Definition wand-view.c:63