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|
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 %
% John Cristy %
% March 2003 %
% %
% %
% Copyright 1999-2004 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/www/Copyright.html %
% %
% 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 "magick/studio.h"
#include "magick/cache_view.h"
#include "magick/error.h"
#include "magick/memory_.h"
#include "magick/string_.h"
#include "wand/magick_wand.h"
#include "wand/pixel_iterator.h"
#include "wand/pixel_wand.h"
/*
Typedef declarations.
*/
struct _PixelIterator
{
ExceptionInfo
exception;
ViewInfo
*view;
RectangleInfo
region;
long
y;
PixelWand
**pixel_wand;
unsigned long
signature;
};
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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:
%
% MagickBooleanType DestroyPixelIterator(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: The pixel iterator.
%
%
*/
WandExport void DestroyPixelIterator(PixelIterator *iterator)
{
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == MagickSignature);
CloseCacheView(iterator->view);
DestroyPixelWands(iterator->pixel_wand,iterator->region.width);
DestroyExceptionInfo(&iterator->exception);
iterator=(PixelIterator *) RelinquishMagickMemory(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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)
{
Image
*image;
PixelIterator
*iterator;
assert(wand != (MagickWand *) NULL);
image=GetImageFromMagickWand(wand);
if (image == (Image *) NULL)
return((PixelIterator *) NULL);
iterator=(PixelIterator *) AcquireMagickMemory(sizeof(*iterator));
if (iterator == (PixelIterator *) NULL)
ThrowMagickFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
strerror(errno));
(void) ResetMagickMemory(iterator,0,sizeof(*iterator));
GetExceptionInfo(&iterator->exception);
iterator->view=OpenCacheView(image);
SetGeometry(image,&iterator->region);
iterator->pixel_wand=NewPixelWands(iterator->region.width);
iterator->y=(-1);
iterator->signature=MagickSignature;
return(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 long x,
% const long y,const unsigned long columns,const unsigned long rows,
% const MagickBooleanType modify)
%
% 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 long x,
const long y,const unsigned long columns,const unsigned long rows)
{
Image
*image;
PixelIterator
*iterator;
assert(wand != (MagickWand *) NULL);
image=GetImageFromMagickWand(wand);
if (image == (Image *) NULL)
return((PixelIterator *) NULL);
iterator=(PixelIterator *) AcquireMagickMemory(sizeof(*iterator));
if (iterator == (PixelIterator *) NULL)
ThrowMagickFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
strerror(errno));
(void) ResetMagickMemory(iterator,0,sizeof(*iterator));
GetExceptionInfo(&iterator->exception);
iterator->view=OpenCacheView(image);
SetGeometry(image,&iterator->region);
iterator->region.x=x;
iterator->region.y=y;
iterator->region.width=columns;
iterator->region.height=rows;
iterator->pixel_wand=NewPixelWands(iterator->region.width);
iterator->y=(-1);
iterator->signature=MagickSignature;
return(iterator);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% P i x e l I t e r a t o r G e t E x c e p t i o n %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelIteratorGetException() returns the severity, reason, and description of
% any error that occurs when using other methods in this API.
%
% The format of the PixelIteratorGetException method is:
%
% char *PixelIteratorGetException(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 *PixelIteratorGetException(const PixelIterator *iterator,
ExceptionType *severity)
{
char
*description;
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == MagickSignature);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(severity != (ExceptionType *) NULL);
*severity=iterator->exception.severity;
description=(char *) AcquireMagickMemory(2*MaxTextExtent);
if (description == (char *) NULL)
ThrowMagickFatalException(ResourceLimitFatalError,"MemoryAllocationFailed",
strerror(errno));
*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 N e x t R o w %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% PixelGetNextRow() returns the next row from the pixel iterator.
%
% The format of the PixelGetNextRow method is:
%
% PixelWand *PixelGetNextRow(PixelIterator *iterator)
%
% A description of each parameter follows:
%
% o iterator: The pixel iterator.
%
*/
WandExport PixelWand **PixelGetNextRow(PixelIterator *iterator)
{
IndexPacket
*indexes;
register const PixelPacket
*p;
register long
x;
assert(iterator != (PixelIterator *) NULL);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator->signature == MagickSignature);
iterator->y++;
if (PixelSetIteratorRow(iterator,iterator->y) == MagickFalse)
return((PixelWand **) NULL);
p=AcquireCacheView(iterator->view,iterator->region.x,iterator->region.y+
iterator->y,iterator->region.width,1,&iterator->exception);
if (p == (const PixelPacket *) NULL)
return((PixelWand **) NULL);
indexes=GetCacheViewIndexes(iterator->view);
for (x=0; x < (long) iterator->region.width; x++)
{
PixelSetQuantumColor(iterator->pixel_wand[x],p);
if (iterator->view->image->colorspace == CMYKColorspace)
PixelSetBlackQuantum(iterator->pixel_wand[x],indexes[x]);
else
if (iterator->view->image->storage_class == PseudoClass)
PixelSetIndex(iterator->pixel_wand[x],indexes[x]);
p++;
}
return(iterator->pixel_wand);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 PixelGetNextPixel() 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);
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator->signature == MagickSignature);
iterator->y=(-1);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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 long row)
%
% A description of each parameter follows:
%
% o iterator: The pixel iterator.
%
%
*/
WandExport MagickBooleanType PixelSetIteratorRow(PixelIterator *iterator,
const long row)
{
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == MagickSignature);
if ((row < iterator->region.y) || (row >= (long) iterator->region.height))
return(MagickFalse);
iterator->y=row;
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% 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)
{
IndexPacket
*indexes;
register long
x;
register PixelPacket
*p;
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"");
assert(iterator != (const PixelIterator *) NULL);
assert(iterator->signature == MagickSignature);
p=GetCacheView(iterator->view,iterator->region.x,iterator->region.y+
iterator->y,iterator->region.width,1);
if (p == (PixelPacket *) NULL)
{
InheritException(&iterator->exception,&iterator->view->image->exception);
return(MagickFalse);
}
indexes=GetCacheViewIndexes(iterator->view);
for (x=0; x < (long) iterator->region.width; x++)
{
PixelGetQuantumColor(iterator->pixel_wand[x],p);
if (iterator->view->image->colorspace == CMYKColorspace)
indexes[x]=PixelGetBlackQuantum(iterator->pixel_wand[x]);
else
if (iterator->view->image->storage_class == PseudoClass)
indexes[x]=PixelGetIndex(iterator->pixel_wand[x]);
p++;
}
if (SyncCacheView(iterator->view) == MagickFalse)
{
InheritException(&iterator->exception,&iterator->view->image->exception);
return(MagickFalse);
}
return(MagickTrue);
}
|
