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imagemagick/wand/pixel-iterator.c

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Import Upstream version 6.9.11.60
2023-02-03 21:16:55 +08:00
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% PPPP IIIII X X EEEEE L %
% P P I X X E L %
% PPPP I X EEE L %
% P I X X E L %
% P IIIII X X EEEEE LLLLL %
% %
% IIIII TTTTT EEEEE RRRR AAA TTTTT OOO RRRR %
% I T E R R A A T O O R R %
% I T EEE RRRR AAAAA T O O RRRR %
% I T E R R A A T O O R R %
% IIIII T EEEEE R R A A T OOO R R %
% %
% %
% ImageMagick Image Pixel Iterator Methods %
% %
% Software Design %
% Cristy %
% March 2003 %
% %
% %
% Copyright 1999-2021 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/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 "wand/studio.h"
#include "wand/MagickWand.h"
#include "wand/magick-wand-private.h"
#include "wand/pixel-iterator.h"
#include "wand/pixel-wand.h"
#include "wand/wand.h"
/*
Define declarations.
*/
#define PixelIteratorId "PixelIterator"
/*
Typedef declarations.
*/
struct _PixelIterator
{
size_t
id;
char
name[MaxTextExtent];
ExceptionInfo
*exception;
CacheView
*view;
RectangleInfo
region;
MagickBooleanType
active;
ssize_t
y;
PixelWand
**pixel_wands;
MagickBooleanType
debug;
size_t
signature;
};
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C l e a r P i x e l I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ClearPixelIterator() clear resources associated with a PixelIterator.
%
% The format of the ClearPixelIterator method is:
%
% void ClearPixelIterator(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport void ClearPixelIterator(PixelIterator *iterator)
{
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->pixel_wands=DestroyPixelWands(iterator->pixel_wands,
iterator->region.width);
ClearMagickException(iterator->exception);
iterator->pixel_wands=NewPixelWands(iterator->region.width);
iterator->active=MagickFalse;
iterator->y=0;
iterator->debug=IsEventLogging();
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C l o n e P i x e l I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ClonePixelIterator() makes an exact copy of the specified iterator.
%
% The format of the ClonePixelIterator method is:
%
% PixelIterator *ClonePixelIterator(const PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the magick iterator.
%
*/
WandExport PixelIterator *ClonePixelIterator(const PixelIterator *iterator)
{
PixelIterator
*clone_iterator;
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
clone_iterator=(PixelIterator *) AcquireCriticalMemory(
sizeof(*clone_iterator));
(void) memset(clone_iterator,0,sizeof(*clone_iterator));
clone_iterator->id=AcquireWandId();
(void) FormatLocaleString(clone_iterator->name,MaxTextExtent,"%s-%.20g",
PixelIteratorId,(double) clone_iterator->id);
clone_iterator->exception=AcquireExceptionInfo();
InheritException(clone_iterator->exception,iterator->exception);
clone_iterator->view=CloneCacheView(iterator->view);
clone_iterator->region=iterator->region;
clone_iterator->active=iterator->active;
clone_iterator->y=iterator->y;
clone_iterator->pixel_wands=ClonePixelWands((const PixelWand **)
iterator->pixel_wands,iterator->region.width);
clone_iterator->debug=iterator->debug;
if (clone_iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",
clone_iterator->name);
clone_iterator->signature=WandSignature;
return(clone_iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% D e s t r o y P i x e l I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% DestroyPixelIterator() deallocates resources associated with a PixelIterator.
%
% The format of the DestroyPixelIterator method is:
%
% PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport PixelIterator *DestroyPixelIterator(PixelIterator *iterator)
{
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->view=DestroyCacheView(iterator->view);
iterator->pixel_wands=DestroyPixelWands(iterator->pixel_wands,
iterator->region.width);
iterator->exception=DestroyExceptionInfo(iterator->exception);
iterator->signature=(~WandSignature);
RelinquishWandId(iterator->id);
iterator=(PixelIterator *) RelinquishMagickMemory(iterator);
return(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s P i x e l I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsPixelIterator() returns MagickTrue if the iterator is verified as a pixel
% iterator.
%
% The format of the IsPixelIterator method is:
%
% MagickBooleanType IsPixelIterator(const PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the magick iterator.
%
*/
WandExport MagickBooleanType IsPixelIterator(const PixelIterator *iterator)
{
size_t
length;
if (iterator == (const PixelIterator *) NULL)
return(MagickFalse);
if (iterator->signature != WandSignature)
return(MagickFalse);
length=strlen(PixelIteratorId);
if (LocaleNCompare(iterator->name,PixelIteratorId,length) != 0)
return(MagickFalse);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% N e w P i x e l I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% NewPixelIterator() returns a new pixel iterator.
%
% The format of the NewPixelIterator method is:
%
% PixelIterator *NewPixelIterator(MagickWand *wand)
%
% A description of each parameter follows:
%
% o wand: the magick wand.
%
*/
WandExport PixelIterator *NewPixelIterator(MagickWand *wand)
{
const char
*quantum;
ExceptionInfo
*exception;
Image
*image;
PixelIterator
*iterator;
size_t
depth;
CacheView
*view;
depth=MAGICKCORE_QUANTUM_DEPTH;
quantum=GetMagickQuantumDepth(&depth);
if (depth != MAGICKCORE_QUANTUM_DEPTH)
ThrowWandFatalException(WandError,"QuantumDepthMismatch",quantum);
assert(wand != (MagickWand *) NULL);
image=GetImageFromMagickWand(wand);
if (image == (Image *) NULL)
return((PixelIterator *) NULL);
exception=AcquireExceptionInfo();
view=AcquireVirtualCacheView(image,exception);
if (view == (CacheView *) NULL)
return((PixelIterator *) NULL);
iterator=(PixelIterator *) AcquireCriticalMemory(sizeof(*iterator));
(void) memset(iterator,0,sizeof(*iterator));
iterator->id=AcquireWandId();
(void) FormatLocaleString(iterator->name,MaxTextExtent,"%s-%.20g",
PixelIteratorId,(double) iterator->id);
iterator->exception=exception;
iterator->view=view;
SetGeometry(image,&iterator->region);
iterator->region.width=image->columns;
iterator->region.height=image->rows;
iterator->region.x=0;
iterator->region.y=0;
iterator->pixel_wands=NewPixelWands(iterator->region.width);
iterator->y=0;
iterator->debug=IsEventLogging();
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->signature=WandSignature;
return(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l C l e a r I t e r a t o r E x c e p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelClearIteratorException() clear any exceptions associated with the
% iterator.
%
% The format of the PixelClearIteratorException method is:
%
% MagickBooleanType PixelClearIteratorException(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport MagickBooleanType PixelClearIteratorException(
PixelIterator *iterator)
{
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
ClearMagickException(iterator->exception);
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% N e w P i x e l R e g i o n I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% NewPixelRegionIterator() returns a new pixel iterator.
%
% The format of the NewPixelRegionIterator method is:
%
% PixelIterator *NewPixelRegionIterator(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 region of
% pixels.
%
*/
WandExport PixelIterator *NewPixelRegionIterator(MagickWand *wand,
const ssize_t x,const ssize_t y,const size_t width,const size_t height)
{
CacheView
*view;
const char
*quantum;
ExceptionInfo
*exception;
Image
*image;
PixelIterator
*iterator;
size_t
depth;
assert(wand != (MagickWand *) NULL);
depth=MAGICKCORE_QUANTUM_DEPTH;
quantum=GetMagickQuantumDepth(&depth);
if (depth != MAGICKCORE_QUANTUM_DEPTH)
ThrowWandFatalException(WandError,"QuantumDepthMismatch",quantum);
if ((width == 0) || (height == 0))
ThrowWandFatalException(WandError,"ZeroRegionSize",quantum);
image=GetImageFromMagickWand(wand);
if (image == (Image *) NULL)
return((PixelIterator *) NULL);
exception=AcquireExceptionInfo();
view=AcquireVirtualCacheView(image,exception);
if (view == (CacheView *) NULL)
return((PixelIterator *) NULL);
iterator=(PixelIterator *) AcquireCriticalMemory(sizeof(*iterator));
(void) memset(iterator,0,sizeof(*iterator));
iterator->id=AcquireWandId();
(void) FormatLocaleString(iterator->name,MaxTextExtent,"%s-%.20g",
PixelIteratorId,(double) iterator->id);
iterator->exception=exception;
iterator->view=view;
SetGeometry(image,&iterator->region);
iterator->region.width=width;
iterator->region.height=height;
iterator->region.x=x;
iterator->region.y=y;
iterator->pixel_wands=NewPixelWands(iterator->region.width);
iterator->y=0;
iterator->debug=IsEventLogging();
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->signature=WandSignature;
return(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t C u r r e n t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetCurrentIteratorRow() returns the current row as an array of pixel
% wands from the pixel iterator.
%
% The format of the PixelGetCurrentIteratorRow method is:
%
% PixelWand **PixelGetCurrentIteratorRow(PixelIterator *iterator,
% size_t *number_wands)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
% o number_wands: the number of pixel wands.
%
*/
WandExport PixelWand **PixelGetCurrentIteratorRow(PixelIterator *iterator,
size_t *number_wands)
{
const IndexPacket
*indexes;
const PixelPacket
*pixels;
ssize_t
x;
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
*number_wands=0;
iterator->active=MagickTrue;
pixels=GetCacheViewVirtualPixels(iterator->view,iterator->region.x,
iterator->region.y+iterator->y,iterator->region.width,1,
iterator->exception);
if (pixels == (const PixelPacket *) NULL)
{
InheritException(iterator->exception,GetCacheViewException(
iterator->view));
return((PixelWand **) NULL);
}
indexes=GetCacheViewVirtualIndexQueue(iterator->view);
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetQuantumColor(iterator->pixel_wands[x],pixels+x);
if (GetCacheViewColorspace(iterator->view) == CMYKColorspace)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetBlackQuantum(iterator->pixel_wands[x],
GetPixelBlack(indexes+x));
if (GetCacheViewStorageClass(iterator->view) == PseudoClass)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetIndex(iterator->pixel_wands[x],
GetPixelBlack(indexes+x));
*number_wands=iterator->region.width;
return(iterator->pixel_wands);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t I t e r a t o r E x c e p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetIteratorException() returns the severity, reason, and description of
% any error that occurs when using other methods in this API.
%
% The format of the PixelGetIteratorException method is:
%
% char *PixelGetIteratorException(const PixelIterator *iterator,
% ExceptionType *severity)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
% o severity: the severity of the error is returned here.
%
*/
WandExport char *PixelGetIteratorException(const PixelIterator *iterator,
ExceptionType *severity)
{
char
*description;
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
assert(severity != (ExceptionType *) NULL);
*severity=iterator->exception->severity;
description=(char *) AcquireQuantumMemory(2UL*MaxTextExtent,
sizeof(*description));
if (description == (char *) NULL)
ThrowWandFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
iterator->name);
*description='\0';
if (iterator->exception->reason != (char *) NULL)
(void) CopyMagickString(description,GetLocaleExceptionMessage(
iterator->exception->severity,iterator->exception->reason),MaxTextExtent);
if (iterator->exception->description != (char *) NULL)
{
(void) ConcatenateMagickString(description," (",MaxTextExtent);
(void) ConcatenateMagickString(description,GetLocaleExceptionMessage(
iterator->exception->severity,iterator->exception->description),
MaxTextExtent);
(void) ConcatenateMagickString(description,")",MaxTextExtent);
}
return(description);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t E x c e p t i o n T y p e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetIteratorExceptionType() the exception type associated with the
% iterator. If no exception has occurred, UndefinedExceptionType is returned.
%
% The format of the PixelGetIteratorExceptionType method is:
%
% ExceptionType PixelGetIteratorExceptionType(
% const PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the magick iterator.
%
*/
WandExport ExceptionType PixelGetIteratorExceptionType(
const PixelIterator *iterator)
{
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
return(iterator->exception->severity);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetIteratorRow() returns the current pixel iterator row.
%
% The format of the PixelGetIteratorRow method is:
%
% MagickBooleanType PixelGetIteratorRow(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport ssize_t PixelGetIteratorRow(PixelIterator *iterator)
{
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
return(iterator->y);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t N e x t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetNextIteratorRow() returns the next row as an array of pixel wands
% from the pixel iterator.
%
% The format of the PixelGetNextIteratorRow method is:
%
% PixelWand **PixelGetNextIteratorRow(PixelIterator *iterator,
% size_t *number_wands)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
% o number_wands: the number of pixel wands.
%
*/
WandExport PixelWand **PixelGetNextIteratorRow(PixelIterator *iterator,
size_t *number_wands)
{
const IndexPacket
*indexes;
const PixelPacket
*pixels;
ssize_t
x;
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
*number_wands=0;
if (iterator->active != MagickFalse)
iterator->y++;
if (PixelSetIteratorRow(iterator,iterator->y) == MagickFalse)
return((PixelWand **) NULL);
pixels=GetCacheViewVirtualPixels(iterator->view,iterator->region.x,
iterator->region.y+iterator->y,iterator->region.width,1,
iterator->exception);
if (pixels == (const PixelPacket *) NULL)
{
InheritException(iterator->exception,GetCacheViewException(
iterator->view));
return((PixelWand **) NULL);
}
indexes=GetCacheViewVirtualIndexQueue(iterator->view);
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetQuantumColor(iterator->pixel_wands[x],pixels+x);
if (GetCacheViewColorspace(iterator->view) == CMYKColorspace)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetBlackQuantum(iterator->pixel_wands[x],
GetPixelBlack(indexes+x));
if (GetCacheViewStorageClass(iterator->view) == PseudoClass)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetIndex(iterator->pixel_wands[x],
GetPixelIndex(indexes+x));
*number_wands=iterator->region.width;
return(iterator->pixel_wands);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l G e t P r e v i o u s I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetPreviousIteratorRow() returns the previous row as an array of pixel
% wands from the pixel iterator.
%
% The format of the PixelGetPreviousIteratorRow method is:
%
% PixelWand **PixelGetPreviousIteratorRow(PixelIterator *iterator,
% size_t *number_wands)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
% o number_wands: the number of pixel wands.
%
*/
WandExport PixelWand **PixelGetPreviousRow(PixelIterator *iterator)
{
size_t
number_wands;
return(PixelGetPreviousIteratorRow(iterator,&number_wands));
}
WandExport PixelWand **PixelGetPreviousIteratorRow(PixelIterator *iterator,
size_t *number_wands)
{
const IndexPacket
*indexes;
const PixelPacket
*pixels;
ssize_t
x;
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
*number_wands=0;
if (iterator->active != MagickFalse)
iterator->y--;
if (PixelSetIteratorRow(iterator,iterator->y) == MagickFalse)
return((PixelWand **) NULL);
pixels=GetCacheViewVirtualPixels(iterator->view,iterator->region.x,
iterator->region.y+iterator->y,iterator->region.width,1,
iterator->exception);
if (pixels == (const PixelPacket *) NULL)
{
InheritException(iterator->exception,GetCacheViewException(
iterator->view));
return((PixelWand **) NULL);
}
indexes=GetCacheViewVirtualIndexQueue(iterator->view);
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetQuantumColor(iterator->pixel_wands[x],pixels+x);
if (GetCacheViewColorspace(iterator->view) == CMYKColorspace)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetBlackQuantum(iterator->pixel_wands[x],
GetPixelBlack(indexes+x));
if (GetCacheViewStorageClass(iterator->view) == PseudoClass)
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelSetIndex(iterator->pixel_wands[x],
GetPixelIndex(indexes+x));
*number_wands=iterator->region.width;
return(iterator->pixel_wands);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l R e s e t I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelResetIterator() resets the pixel iterator. Use it in conjunction
% with PixelGetNextIteratorRow() to iterate over all the pixels in a pixel
% container.
%
% The format of the PixelResetIterator method is:
%
% void PixelResetIterator(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport void PixelResetIterator(PixelIterator *iterator)
{
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->active=MagickFalse;
iterator->y=0;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l S e t F i r s t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelSetFirstIteratorRow() sets the pixel iterator to the first pixel row.
%
% The format of the PixelSetFirstIteratorRow method is:
%
% void PixelSetFirstIteratorRow(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the magick iterator.
%
*/
WandExport void PixelSetFirstIteratorRow(PixelIterator *iterator)
{
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->active=MagickFalse;
iterator->y=iterator->region.y;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l S e t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelSetIteratorRow() set the pixel iterator row.
%
% The format of the PixelSetIteratorRow method is:
%
% MagickBooleanType PixelSetIteratorRow(PixelIterator *iterator,
% const ssize_t row)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport MagickBooleanType PixelSetIteratorRow(PixelIterator *iterator,
const ssize_t row)
{
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
if ((row < 0) || (row >= (ssize_t) iterator->region.height))
return(MagickFalse);
iterator->active=MagickTrue;
iterator->y=row;
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l S e t L a s t I t e r a t o r R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelSetLastIteratorRow() sets the pixel iterator to the last pixel row.
%
% The format of the PixelSetLastIteratorRow method is:
%
% void PixelSetLastIteratorRow(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the magick iterator.
%
*/
WandExport void PixelSetLastIteratorRow(PixelIterator *iterator)
{
assert(iterator != (PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
iterator->active=MagickFalse;
iterator->y=(ssize_t) iterator->region.height-1;
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l S y n c I t e r a t o r %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelSyncIterator() syncs the pixel iterator.
%
% The format of the PixelSyncIterator method is:
%
% MagickBooleanType PixelSyncIterator(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: the pixel iterator.
%
*/
WandExport MagickBooleanType PixelSyncIterator(PixelIterator *iterator)
{
ExceptionInfo
*exception;
IndexPacket
*magick_restrict indexes;
ssize_t
x;
PixelPacket
*magick_restrict pixels;
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == WandSignature);
if (iterator->debug != MagickFalse)
(void) LogMagickEvent(WandEvent,GetMagickModule(),"%s",iterator->name);
if (SetCacheViewStorageClass(iterator->view,DirectClass) == MagickFalse)
return(MagickFalse);
exception=iterator->exception;
pixels=GetCacheViewAuthenticPixels(iterator->view,iterator->region.x,
iterator->region.y+iterator->y,iterator->region.width,1,exception);
if (pixels == (PixelPacket *) NULL)
{
InheritException(iterator->exception,GetCacheViewException(
iterator->view));
return(MagickFalse);
}
indexes=GetCacheViewAuthenticIndexQueue(iterator->view);
for (x=0; x < (ssize_t) iterator->region.width; x++)
PixelGetQuantumColor(iterator->pixel_wands[x],pixels+x);
if (GetCacheViewColorspace(iterator->view) == CMYKColorspace)
for (x=0; x < (ssize_t) iterator->region.width; x++)
SetPixelBlack(indexes+x,PixelGetBlackQuantum(
iterator->pixel_wands[x]));
if (SyncCacheViewAuthenticPixels(iterator->view,exception) == MagickFalse)
{
InheritException(iterator->exception,GetCacheViewException(
iterator->view));
return(MagickFalse);
}
return(MagickTrue);
}