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PL286/external/ImageMagick/MagickCore/transform.c

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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% TTTTT RRRR AAA N N SSSSS FFFFF OOO RRRR M M %
% T R R A A NN N SS F O O R R MM MM %
% T RRRR AAAAA N N N SSS FFF O O RRRR M M M %
% T R R A A N NN SS F O O R R M M %
% T R R A A N N SSSSS F OOO R R M M %
% %
% %
% MagickCore Image Transform Methods %
% %
% Software Design %
% Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2016 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/attribute.h"
#include "MagickCore/cache.h"
#include "MagickCore/cache-view.h"
#include "MagickCore/color.h"
#include "MagickCore/color-private.h"
#include "MagickCore/colorspace-private.h"
#include "MagickCore/composite.h"
#include "MagickCore/distort.h"
#include "MagickCore/draw.h"
#include "MagickCore/effect.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/geometry.h"
#include "MagickCore/image.h"
#include "MagickCore/memory_.h"
#include "MagickCore/layer.h"
#include "MagickCore/list.h"
#include "MagickCore/monitor.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/resource_.h"
#include "MagickCore/resize.h"
#include "MagickCore/statistic.h"
#include "MagickCore/string_.h"
#include "MagickCore/thread-private.h"
#include "MagickCore/transform.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% A u t o O r i e n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% AutoOrientImage() adjusts an image so that its orientation is suitable for
% viewing (i.e. top-left orientation).
%
% The format of the AutoOrientImage method is:
%
% Image *AutoOrientImage(const Image *image,
% const OrientationType orientation,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: The image.
%
% o orientation: Current image orientation.
%
% o exception: Return any errors or warnings in this structure.
%
*/
MagickExport Image *AutoOrientImage(const Image *image,
const OrientationType orientation,ExceptionInfo *exception)
{
Image
*orient_image;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
orient_image=(Image *) NULL;
switch(orientation)
{
case UndefinedOrientation:
case TopLeftOrientation:
default:
{
orient_image=CloneImage(image,0,0,MagickTrue,exception);
break;
}
case TopRightOrientation:
{
orient_image=FlopImage(image,exception);
break;
}
case BottomRightOrientation:
{
orient_image=RotateImage(image,180.0,exception);
break;
}
case BottomLeftOrientation:
{
orient_image=FlipImage(image,exception);
break;
}
case LeftTopOrientation:
{
orient_image=TransposeImage(image,exception);
break;
}
case RightTopOrientation:
{
orient_image=RotateImage(image,90.0,exception);
break;
}
case RightBottomOrientation:
{
orient_image=TransverseImage(image,exception);
break;
}
case LeftBottomOrientation:
{
orient_image=RotateImage(image,270.0,exception);
break;
}
}
if (orient_image != (Image *) NULL)
orient_image->orientation=TopLeftOrientation;
return(orient_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C h o p I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ChopImage() removes a region of an image and collapses the image to occupy
% the removed portion.
%
% The format of the ChopImage method is:
%
% Image *ChopImage(const Image *image,const RectangleInfo *chop_info)
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o chop_info: Define the region of the image to chop.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *ChopImage(const Image *image,const RectangleInfo *chop_info,
ExceptionInfo *exception)
{
#define ChopImageTag "Chop/Image"
CacheView
*chop_view,
*image_view;
Image
*chop_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
extent;
ssize_t
y;
/*
Check chop geometry.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
assert(chop_info != (RectangleInfo *) NULL);
if (((chop_info->x+(ssize_t) chop_info->width) < 0) ||
((chop_info->y+(ssize_t) chop_info->height) < 0) ||
(chop_info->x > (ssize_t) image->columns) ||
(chop_info->y > (ssize_t) image->rows))
ThrowImageException(OptionWarning,"GeometryDoesNotContainImage");
extent=(*chop_info);
if ((extent.x+(ssize_t) extent.width) > (ssize_t) image->columns)
extent.width=(size_t) ((ssize_t) image->columns-extent.x);
if ((extent.y+(ssize_t) extent.height) > (ssize_t) image->rows)
extent.height=(size_t) ((ssize_t) image->rows-extent.y);
if (extent.x < 0)
{
extent.width-=(size_t) (-extent.x);
extent.x=0;
}
if (extent.y < 0)
{
extent.height-=(size_t) (-extent.y);
extent.y=0;
}
chop_image=CloneImage(image,image->columns-extent.width,image->rows-
extent.height,MagickTrue,exception);
if (chop_image == (Image *) NULL)
return((Image *) NULL);
/*
Extract chop image.
*/
status=MagickTrue;
progress=0;
image_view=AcquireVirtualCacheView(image,exception);
chop_view=AcquireAuthenticCacheView(chop_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(status) \
magick_threads(image,chop_image,1,1)
#endif
for (y=0; y < (ssize_t) extent.y; y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(chop_view,0,y,chop_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) image->columns; x++)
{
if ((x < extent.x) || (x >= (ssize_t) (extent.x+extent.width)))
{
register ssize_t
i;
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait chop_traits=GetPixelChannelTraits(chop_image,channel);
if ((traits == UndefinedPixelTrait) ||
(chop_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(chop_image,channel,p[i],q);
}
q+=GetPixelChannels(chop_image);
}
p+=GetPixelChannels(image);
}
if (SyncCacheViewAuthenticPixels(chop_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_ChopImage)
#endif
proceed=SetImageProgress(image,ChopImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
/*
Extract chop image.
*/
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,chop_image,1,1)
#endif
for (y=0; y < (ssize_t) (image->rows-(extent.y+extent.height)); y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,extent.y+extent.height+y,
image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(chop_view,0,extent.y+y,chop_image->columns,
1,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) image->columns; x++)
{
if ((x < extent.x) || (x >= (ssize_t) (extent.x+extent.width)))
{
register ssize_t
i;
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait chop_traits=GetPixelChannelTraits(chop_image,channel);
if ((traits == UndefinedPixelTrait) ||
(chop_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(chop_image,channel,p[i],q);
}
q+=GetPixelChannels(chop_image);
}
p+=GetPixelChannels(image);
}
if (SyncCacheViewAuthenticPixels(chop_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_ChopImage)
#endif
proceed=SetImageProgress(image,ChopImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
chop_view=DestroyCacheView(chop_view);
image_view=DestroyCacheView(image_view);
chop_image->type=image->type;
if (status == MagickFalse)
chop_image=DestroyImage(chop_image);
return(chop_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ C o n s o l i d a t e C M Y K I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ConsolidateCMYKImage() consolidates separate C, M, Y, and K planes into a
% single image.
%
% The format of the ConsolidateCMYKImage method is:
%
% Image *ConsolidateCMYKImage(const Image *image,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image sequence.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *ConsolidateCMYKImages(const Image *images,
ExceptionInfo *exception)
{
CacheView
*cmyk_view,
*image_view;
Image
*cmyk_image,
*cmyk_images;
register ssize_t
j;
ssize_t
y;
/*
Consolidate separate C, M, Y, and K planes into a single image.
*/
assert(images != (Image *) NULL);
assert(images->signature == MagickCoreSignature);
if (images->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",images->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
cmyk_images=NewImageList();
for (j=0; j < (ssize_t) GetImageListLength(images); j+=4)
{
register ssize_t
i;
assert(images != (Image *) NULL);
cmyk_image=CloneImage(images,images->columns,images->rows,MagickTrue,
exception);
if (cmyk_image == (Image *) NULL)
break;
if (SetImageStorageClass(cmyk_image,DirectClass,exception) == MagickFalse)
break;
(void) SetImageColorspace(cmyk_image,CMYKColorspace,exception);
for (i=0; i < 4; i++)
{
image_view=AcquireVirtualCacheView(images,exception);
cmyk_view=AcquireAuthenticCacheView(cmyk_image,exception);
for (y=0; y < (ssize_t) images->rows; y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
p=GetCacheViewVirtualPixels(image_view,0,y,images->columns,1,exception);
q=QueueCacheViewAuthenticPixels(cmyk_view,0,y,cmyk_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
break;
for (x=0; x < (ssize_t) images->columns; x++)
{
Quantum
pixel;
pixel=QuantumRange-GetPixelIntensity(images,p);
switch (i)
{
case 0: SetPixelCyan(cmyk_image,pixel,q); break;
case 1: SetPixelMagenta(cmyk_image,pixel,q); break;
case 2: SetPixelYellow(cmyk_image,pixel,q); break;
case 3: SetPixelBlack(cmyk_image,pixel,q); break;
default: break;
}
p+=GetPixelChannels(images);
q+=GetPixelChannels(cmyk_image);
}
if (SyncCacheViewAuthenticPixels(cmyk_view,exception) == MagickFalse)
break;
}
cmyk_view=DestroyCacheView(cmyk_view);
image_view=DestroyCacheView(image_view);
images=GetNextImageInList(images);
if (images == (Image *) NULL)
break;
}
AppendImageToList(&cmyk_images,cmyk_image);
}
return(cmyk_images);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C r o p I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CropImage() extracts a region of the image starting at the offset defined
% by geometry. Region must be fully defined, and no special handling of
% geometry flags is performed.
%
% The format of the CropImage method is:
%
% Image *CropImage(const Image *image,const RectangleInfo *geometry,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o geometry: Define the region of the image to crop with members
% x, y, width, and height.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *CropImage(const Image *image,const RectangleInfo *geometry,
ExceptionInfo *exception)
{
#define CropImageTag "Crop/Image"
CacheView
*crop_view,
*image_view;
Image
*crop_image;
MagickBooleanType
status;
MagickOffsetType
progress;
OffsetInfo
offset;
RectangleInfo
bounding_box,
page;
ssize_t
y;
/*
Check crop geometry.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (const RectangleInfo *) NULL);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
bounding_box=image->page;
if ((bounding_box.width == 0) || (bounding_box.height == 0))
{
bounding_box.width=image->columns;
bounding_box.height=image->rows;
}
page=(*geometry);
if (page.width == 0)
page.width=bounding_box.width;
if (page.height == 0)
page.height=bounding_box.height;
if (((bounding_box.x-page.x) >= (ssize_t) page.width) ||
((bounding_box.y-page.y) >= (ssize_t) page.height) ||
((page.x-bounding_box.x) > (ssize_t) image->columns) ||
((page.y-bounding_box.y) > (ssize_t) image->rows))
{
/*
Crop is not within virtual canvas, return 1 pixel transparent image.
*/
(void) ThrowMagickException(exception,GetMagickModule(),OptionWarning,
"GeometryDoesNotContainImage","`%s'",image->filename);
crop_image=CloneImage(image,1,1,MagickTrue,exception);
if (crop_image == (Image *) NULL)
return((Image *) NULL);
crop_image->background_color.alpha=(Quantum) TransparentAlpha;
crop_image->alpha_trait=BlendPixelTrait;
(void) SetImageBackgroundColor(crop_image,exception);
crop_image->page=bounding_box;
crop_image->page.x=(-1);
crop_image->page.y=(-1);
if (crop_image->dispose == BackgroundDispose)
crop_image->dispose=NoneDispose;
return(crop_image);
}
if ((page.x < 0) && (bounding_box.x >= 0))
{
page.width+=page.x-bounding_box.x;
page.x=0;
}
else
{
page.width-=bounding_box.x-page.x;
page.x-=bounding_box.x;
if (page.x < 0)
page.x=0;
}
if ((page.y < 0) && (bounding_box.y >= 0))
{
page.height+=page.y-bounding_box.y;
page.y=0;
}
else
{
page.height-=bounding_box.y-page.y;
page.y-=bounding_box.y;
if (page.y < 0)
page.y=0;
}
if ((page.x+(ssize_t) page.width) > (ssize_t) image->columns)
page.width=image->columns-page.x;
if ((geometry->width != 0) && (page.width > geometry->width))
page.width=geometry->width;
if ((page.y+(ssize_t) page.height) > (ssize_t) image->rows)
page.height=image->rows-page.y;
if ((geometry->height != 0) && (page.height > geometry->height))
page.height=geometry->height;
bounding_box.x+=page.x;
bounding_box.y+=page.y;
if ((page.width == 0) || (page.height == 0))
{
(void) ThrowMagickException(exception,GetMagickModule(),OptionWarning,
"GeometryDoesNotContainImage","`%s'",image->filename);
return((Image *) NULL);
}
/*
Initialize crop image attributes.
*/
crop_image=CloneImage(image,page.width,page.height,MagickTrue,exception);
if (crop_image == (Image *) NULL)
return((Image *) NULL);
crop_image->page.width=image->page.width;
crop_image->page.height=image->page.height;
offset.x=(ssize_t) (bounding_box.x+bounding_box.width);
offset.y=(ssize_t) (bounding_box.y+bounding_box.height);
if ((offset.x > (ssize_t) image->page.width) ||
(offset.y > (ssize_t) image->page.height))
{
crop_image->page.width=bounding_box.width;
crop_image->page.height=bounding_box.height;
}
crop_image->page.x=bounding_box.x;
crop_image->page.y=bounding_box.y;
/*
Crop image.
*/
status=MagickTrue;
progress=0;
image_view=AcquireVirtualCacheView(image,exception);
crop_view=AcquireAuthenticCacheView(crop_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(status) \
magick_threads(image,crop_image,1,1)
#endif
for (y=0; y < (ssize_t) crop_image->rows; y++)
{
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,page.x,page.y+y,crop_image->columns,
1,exception);
q=QueueCacheViewAuthenticPixels(crop_view,0,y,crop_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) crop_image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,p) == 0)
{
SetPixelBackgoundColor(crop_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(crop_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait crop_traits=GetPixelChannelTraits(crop_image,channel);
if ((traits == UndefinedPixelTrait) ||
(crop_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(crop_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
q+=GetPixelChannels(crop_image);
}
if (SyncCacheViewAuthenticPixels(crop_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_CropImage)
#endif
proceed=SetImageProgress(image,CropImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
crop_view=DestroyCacheView(crop_view);
image_view=DestroyCacheView(image_view);
crop_image->type=image->type;
if (status == MagickFalse)
crop_image=DestroyImage(crop_image);
return(crop_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% C r o p I m a g e T o T i l e s %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% CropImageToTiles() crops a single image, into a possible list of tiles.
% This may include a single sub-region of the image. This basically applies
% all the normal geometry flags for Crop.
%
% Image *CropImageToTiles(const Image *image,
% const RectangleInfo *crop_geometry, ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image The transformed image is returned as this parameter.
%
% o crop_geometry: A crop geometry string.
%
% o exception: return any errors or warnings in this structure.
%
*/
static inline double MagickRound(double x)
{
/*
Round the fraction to nearest integer.
*/
if ((x-floor(x)) < (ceil(x)-x))
return(floor(x));
return(ceil(x));
}
MagickExport Image *CropImageToTiles(const Image *image,
const char *crop_geometry,ExceptionInfo *exception)
{
Image
*next,
*crop_image;
MagickStatusType
flags;
RectangleInfo
geometry;
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
crop_image=NewImageList();
next=NewImageList();
flags=ParseGravityGeometry(image,crop_geometry,&geometry,exception);
if ((flags & AreaValue) != 0)
{
PointInfo
delta,
offset;
RectangleInfo
crop;
size_t
height,
width;
/*
Crop into NxM tiles (@ flag).
*/
width=image->columns;
height=image->rows;
if (geometry.width == 0)
geometry.width=1;
if (geometry.height == 0)
geometry.height=1;
if ((flags & AspectValue) == 0)
{
width-=(geometry.x < 0 ? -1 : 1)*geometry.x;
height-=(geometry.y < 0 ? -1 : 1)*geometry.y;
}
else
{
width+=(geometry.x < 0 ? -1 : 1)*geometry.x;
height+=(geometry.y < 0 ? -1 : 1)*geometry.y;
}
delta.x=(double) width/geometry.width;
delta.y=(double) height/geometry.height;
if (delta.x < 1.0)
delta.x=1.0;
if (delta.y < 1.0)
delta.y=1.0;
for (offset.y=0; offset.y < (double) height; )
{
if ((flags & AspectValue) == 0)
{
crop.y=(ssize_t) MagickRound((double) (offset.y-
(geometry.y > 0 ? 0 : geometry.y)));
offset.y+=delta.y; /* increment now to find width */
crop.height=(size_t) MagickRound((double) (offset.y+
(geometry.y < 0 ? 0 : geometry.y)));
}
else
{
crop.y=(ssize_t) MagickRound((double) (offset.y-
(geometry.y > 0 ? geometry.y : 0)));
offset.y+=delta.y; /* increment now to find width */
crop.height=(size_t) MagickRound((double)
(offset.y+(geometry.y < -1 ? geometry.y : 0)));
}
crop.height-=crop.y;
crop.y+=image->page.y;
for (offset.x=0; offset.x < (double) width; )
{
if ((flags & AspectValue) == 0)
{
crop.x=(ssize_t) MagickRound((double) (offset.x-
(geometry.x > 0 ? 0 : geometry.x)));
offset.x+=delta.x; /* increment now to find height */
crop.width=(size_t) MagickRound((double) (offset.x+
(geometry.x < 0 ? 0 : geometry.x)));
}
else
{
crop.x=(ssize_t) MagickRound((double) (offset.x-
(geometry.x > 0 ? geometry.x : 0)));
offset.x+=delta.x; /* increment now to find height */
crop.width=(size_t) MagickRound((double) (offset.x+
(geometry.x < 0 ? geometry.x : 0)));
}
crop.width-=crop.x;
crop.x+=image->page.x;
next=CropImage(image,&crop,exception);
if (next != (Image *) NULL)
AppendImageToList(&crop_image,next);
}
}
ClearMagickException(exception);
return(crop_image);
}
if (((geometry.width == 0) && (geometry.height == 0)) ||
((flags & XValue) != 0) || ((flags & YValue) != 0))
{
/*
Crop a single region at +X+Y.
*/
crop_image=CropImage(image,&geometry,exception);
if ((crop_image != (Image *) NULL) && ((flags & AspectValue) != 0))
{
crop_image->page.width=geometry.width;
crop_image->page.height=geometry.height;
crop_image->page.x-=geometry.x;
crop_image->page.y-=geometry.y;
}
return(crop_image);
}
if ((image->columns > geometry.width) || (image->rows > geometry.height))
{
RectangleInfo
page;
size_t
height,
width;
ssize_t
x,
y;
/*
Crop into tiles of fixed size WxH.
*/
page=image->page;
if (page.width == 0)
page.width=image->columns;
if (page.height == 0)
page.height=image->rows;
width=geometry.width;
if (width == 0)
width=page.width;
height=geometry.height;
if (height == 0)
height=page.height;
next=NewImageList();
for (y=0; y < (ssize_t) page.height; y+=(ssize_t) height)
{
for (x=0; x < (ssize_t) page.width; x+=(ssize_t) width)
{
geometry.width=width;
geometry.height=height;
geometry.x=x;
geometry.y=y;
next=CropImage(image,&geometry,exception);
if (next == (Image *) NULL)
break;
AppendImageToList(&crop_image,next);
}
if (next == (Image *) NULL)
break;
}
return(crop_image);
}
return(CloneImage(image,0,0,MagickTrue,exception));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% E x c e r p t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ExcerptImage() returns a excerpt of the image as defined by the geometry.
%
% The format of the ExcerptImage method is:
%
% Image *ExcerptImage(const Image *image,const RectangleInfo *geometry,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o geometry: Define the region of the image to extend with members
% x, y, width, and height.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *ExcerptImage(const Image *image,
const RectangleInfo *geometry,ExceptionInfo *exception)
{
#define ExcerptImageTag "Excerpt/Image"
CacheView
*excerpt_view,
*image_view;
Image
*excerpt_image;
MagickBooleanType
status;
MagickOffsetType
progress;
ssize_t
y;
/*
Allocate excerpt image.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (const RectangleInfo *) NULL);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
excerpt_image=CloneImage(image,geometry->width,geometry->height,MagickTrue,
exception);
if (excerpt_image == (Image *) NULL)
return((Image *) NULL);
/*
Excerpt each row.
*/
status=MagickTrue;
progress=0;
image_view=AcquireVirtualCacheView(image,exception);
excerpt_view=AcquireAuthenticCacheView(excerpt_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,excerpt_image,excerpt_image->rows,1)
#endif
for (y=0; y < (ssize_t) excerpt_image->rows; y++)
{
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,geometry->x,geometry->y+y,
geometry->width,1,exception);
q=GetCacheViewAuthenticPixels(excerpt_view,0,y,excerpt_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) excerpt_image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,p) == 0)
{
SetPixelBackgoundColor(excerpt_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(excerpt_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait excerpt_traits=GetPixelChannelTraits(excerpt_image,channel);
if ((traits == UndefinedPixelTrait) ||
(excerpt_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(excerpt_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
q+=GetPixelChannels(excerpt_image);
}
if (SyncCacheViewAuthenticPixels(excerpt_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_ExcerptImage)
#endif
proceed=SetImageProgress(image,ExcerptImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
excerpt_view=DestroyCacheView(excerpt_view);
image_view=DestroyCacheView(image_view);
excerpt_image->type=image->type;
if (status == MagickFalse)
excerpt_image=DestroyImage(excerpt_image);
return(excerpt_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% E x t e n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ExtentImage() extends the image as defined by the geometry, gravity, and
% image background color. Set the (x,y) offset of the geometry to move the
% original image relative to the extended image.
%
% The format of the ExtentImage method is:
%
% Image *ExtentImage(const Image *image,const RectangleInfo *geometry,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o geometry: Define the region of the image to extend with members
% x, y, width, and height.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *ExtentImage(const Image *image,
const RectangleInfo *geometry,ExceptionInfo *exception)
{
Image
*extent_image;
/*
Allocate extent image.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (const RectangleInfo *) NULL);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
if ((image->columns == geometry->width) &&
(image->rows == geometry->height) &&
(geometry->x == 0) && (geometry->y == 0))
return(CloneImage(image,0,0,MagickTrue,exception));
extent_image=CloneImage(image,geometry->width,geometry->height,MagickTrue,
exception);
if (extent_image == (Image *) NULL)
return((Image *) NULL);
(void) SetImageBackgroundColor(extent_image,exception);
(void) CompositeImage(extent_image,image,image->compose,MagickTrue,
-geometry->x,-geometry->y,exception);
return(extent_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F l i p I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FlipImage() creates a vertical mirror image by reflecting the pixels
% around the central x-axis.
%
% The format of the FlipImage method is:
%
% Image *FlipImage(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 Image *FlipImage(const Image *image,ExceptionInfo *exception)
{
#define FlipImageTag "Flip/Image"
CacheView
*flip_view,
*image_view;
Image
*flip_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
page;
ssize_t
y;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
flip_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
if (flip_image == (Image *) NULL)
return((Image *) NULL);
/*
Flip image.
*/
status=MagickTrue;
progress=0;
page=image->page;
image_view=AcquireVirtualCacheView(image,exception);
flip_view=AcquireAuthenticCacheView(flip_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(status) \
magick_threads(image,flip_image,1,1)
#endif
for (y=0; y < (ssize_t) flip_image->rows; y++)
{
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(flip_view,0,(ssize_t) (flip_image->rows-y-
1),flip_image->columns,1,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) flip_image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,p) == 0)
{
SetPixelBackgoundColor(flip_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(flip_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait flip_traits=GetPixelChannelTraits(flip_image,channel);
if ((traits == UndefinedPixelTrait) ||
(flip_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(flip_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
q+=GetPixelChannels(flip_image);
}
if (SyncCacheViewAuthenticPixels(flip_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_FlipImage)
#endif
proceed=SetImageProgress(image,FlipImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
flip_view=DestroyCacheView(flip_view);
image_view=DestroyCacheView(image_view);
flip_image->type=image->type;
if (page.height != 0)
page.y=(ssize_t) (page.height-flip_image->rows-page.y);
flip_image->page=page;
if (status == MagickFalse)
flip_image=DestroyImage(flip_image);
return(flip_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F l o p I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FlopImage() creates a horizontal mirror image by reflecting the pixels
% around the central y-axis.
%
% The format of the FlopImage method is:
%
% Image *FlopImage(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 Image *FlopImage(const Image *image,ExceptionInfo *exception)
{
#define FlopImageTag "Flop/Image"
CacheView
*flop_view,
*image_view;
Image
*flop_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
page;
ssize_t
y;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
flop_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
if (flop_image == (Image *) NULL)
return((Image *) NULL);
/*
Flop each row.
*/
status=MagickTrue;
progress=0;
page=image->page;
image_view=AcquireVirtualCacheView(image,exception);
flop_view=AcquireAuthenticCacheView(flop_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(status) \
magick_threads(image,flop_image,1,1)
#endif
for (y=0; y < (ssize_t) flop_image->rows; y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(flop_view,0,y,flop_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
q+=GetPixelChannels(flop_image)*flop_image->columns;
for (x=0; x < (ssize_t) flop_image->columns; x++)
{
register ssize_t
i;
q-=GetPixelChannels(flop_image);
if (GetPixelReadMask(image,p) == 0)
{
p+=GetPixelChannels(image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait flop_traits=GetPixelChannelTraits(flop_image,channel);
if ((traits == UndefinedPixelTrait) ||
(flop_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(flop_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
}
if (SyncCacheViewAuthenticPixels(flop_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_FlopImage)
#endif
proceed=SetImageProgress(image,FlopImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
flop_view=DestroyCacheView(flop_view);
image_view=DestroyCacheView(image_view);
flop_image->type=image->type;
if (page.width != 0)
page.x=(ssize_t) (page.width-flop_image->columns-page.x);
flop_image->page=page;
if (status == MagickFalse)
flop_image=DestroyImage(flop_image);
return(flop_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R o l l I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RollImage() offsets an image as defined by x_offset and y_offset.
%
% The format of the RollImage method is:
%
% Image *RollImage(const Image *image,const ssize_t x_offset,
% const ssize_t y_offset,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o x_offset: the number of columns to roll in the horizontal direction.
%
% o y_offset: the number of rows to roll in the vertical direction.
%
% o exception: return any errors or warnings in this structure.
%
*/
static MagickBooleanType CopyImageRegion(Image *destination,const Image *source, const size_t columns,const size_t rows,const ssize_t sx,const ssize_t sy,
const ssize_t dx,const ssize_t dy,ExceptionInfo *exception)
{
CacheView
*source_view,
*destination_view;
MagickBooleanType
status;
ssize_t
y;
if (columns == 0)
return(MagickTrue);
status=MagickTrue;
source_view=AcquireVirtualCacheView(source,exception);
destination_view=AcquireAuthenticCacheView(destination,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(status) \
magick_threads(source,destination,rows,1)
#endif
for (y=0; y < (ssize_t) rows; y++)
{
MagickBooleanType
sync;
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
/*
Transfer scanline.
*/
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(source_view,sx,sy+y,columns,1,exception);
q=GetCacheViewAuthenticPixels(destination_view,dx,dy+y,columns,1,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(source,p) == 0)
{
SetPixelBackgoundColor(destination,q);
p+=GetPixelChannels(source);
q+=GetPixelChannels(destination);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(source); i++)
{
PixelChannel channel=GetPixelChannelChannel(source,i);
PixelTrait source_traits=GetPixelChannelTraits(source,channel);
PixelTrait destination_traits=GetPixelChannelTraits(destination,
channel);
if ((source_traits == UndefinedPixelTrait) ||
(destination_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(destination,channel,p[i],q);
}
p+=GetPixelChannels(source);
q+=GetPixelChannels(destination);
}
sync=SyncCacheViewAuthenticPixels(destination_view,exception);
if (sync == MagickFalse)
status=MagickFalse;
}
destination_view=DestroyCacheView(destination_view);
source_view=DestroyCacheView(source_view);
return(status);
}
MagickExport Image *RollImage(const Image *image,const ssize_t x_offset,
const ssize_t y_offset,ExceptionInfo *exception)
{
#define RollImageTag "Roll/Image"
Image
*roll_image;
MagickStatusType
status;
RectangleInfo
offset;
/*
Initialize roll image attributes.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
roll_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
if (roll_image == (Image *) NULL)
return((Image *) NULL);
offset.x=x_offset;
offset.y=y_offset;
while (offset.x < 0)
offset.x+=(ssize_t) image->columns;
while (offset.x >= (ssize_t) image->columns)
offset.x-=(ssize_t) image->columns;
while (offset.y < 0)
offset.y+=(ssize_t) image->rows;
while (offset.y >= (ssize_t) image->rows)
offset.y-=(ssize_t) image->rows;
/*
Roll image.
*/
status=CopyImageRegion(roll_image,image,(size_t) offset.x,
(size_t) offset.y,(ssize_t) image->columns-offset.x,(ssize_t) image->rows-
offset.y,0,0,exception);
(void) SetImageProgress(image,RollImageTag,0,3);
status&=CopyImageRegion(roll_image,image,image->columns-offset.x,
(size_t) offset.y,0,(ssize_t) image->rows-offset.y,offset.x,0,
exception);
(void) SetImageProgress(image,RollImageTag,1,3);
status&=CopyImageRegion(roll_image,image,(size_t) offset.x,image->rows-
offset.y,(ssize_t) image->columns-offset.x,0,0,offset.y,exception);
(void) SetImageProgress(image,RollImageTag,2,3);
status&=CopyImageRegion(roll_image,image,image->columns-offset.x,image->rows-
offset.y,0,0,offset.x,offset.y,exception);
(void) SetImageProgress(image,RollImageTag,3,3);
roll_image->type=image->type;
if (status == MagickFalse)
roll_image=DestroyImage(roll_image);
return(roll_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S h a v e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ShaveImage() shaves pixels from the image edges. It allocates the memory
% necessary for the new Image structure and returns a pointer to the new
% image.
%
% The format of the ShaveImage method is:
%
% Image *ShaveImage(const Image *image,const RectangleInfo *shave_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o shave_image: Method ShaveImage returns a pointer to the shaved
% image. A null image is returned if there is a memory shortage or
% if the image width or height is zero.
%
% o image: the image.
%
% o shave_info: Specifies a pointer to a RectangleInfo which defines the
% region of the image to crop.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *ShaveImage(const Image *image,
const RectangleInfo *shave_info,ExceptionInfo *exception)
{
Image
*shave_image;
RectangleInfo
geometry;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
if (((2*shave_info->width) >= image->columns) ||
((2*shave_info->height) >= image->rows))
ThrowImageException(OptionWarning,"GeometryDoesNotContainImage");
SetGeometry(image,&geometry);
geometry.width-=2*shave_info->width;
geometry.height-=2*shave_info->height;
geometry.x=(ssize_t) shave_info->width+image->page.x;
geometry.y=(ssize_t) shave_info->height+image->page.y;
shave_image=CropImage(image,&geometry,exception);
if (shave_image == (Image *) NULL)
return((Image *) NULL);
shave_image->page.width-=2*shave_info->width;
shave_image->page.height-=2*shave_info->height;
shave_image->page.x-=(ssize_t) shave_info->width;
shave_image->page.y-=(ssize_t) shave_info->height;
return(shave_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% S p l i c e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% SpliceImage() splices a solid color into the image as defined by the
% geometry.
%
% The format of the SpliceImage method is:
%
% Image *SpliceImage(const Image *image,const RectangleInfo *geometry,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o geometry: Define the region of the image to splice with members
% x, y, width, and height.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickExport Image *SpliceImage(const Image *image,
const RectangleInfo *geometry,ExceptionInfo *exception)
{
#define SpliceImageTag "Splice/Image"
CacheView
*image_view,
*splice_view;
Image
*splice_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
splice_geometry;
ssize_t
columns,
y;
/*
Allocate splice image.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(geometry != (const RectangleInfo *) NULL);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
splice_geometry=(*geometry);
splice_image=CloneImage(image,image->columns+splice_geometry.width,
image->rows+splice_geometry.height,MagickTrue,exception);
if (splice_image == (Image *) NULL)
return((Image *) NULL);
if (SetImageStorageClass(splice_image,DirectClass,exception) == MagickFalse)
{
splice_image=DestroyImage(splice_image);
return((Image *) NULL);
}
if ((IsPixelInfoGray(&splice_image->background_color) == MagickFalse) &&
(IsGrayColorspace(splice_image->colorspace) != MagickFalse))
(void) SetImageColorspace(splice_image,sRGBColorspace,exception);
if ((splice_image->background_color.alpha_trait != UndefinedPixelTrait) &&
(splice_image->alpha_trait == UndefinedPixelTrait))
(void) SetImageAlpha(splice_image,OpaqueAlpha,exception);
(void) SetImageBackgroundColor(splice_image,exception);
/*
Respect image geometry.
*/
switch (image->gravity)
{
default:
case UndefinedGravity:
case NorthWestGravity:
break;
case NorthGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width/2;
break;
}
case NorthEastGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width;
break;
}
case WestGravity:
{
splice_geometry.y+=(ssize_t) splice_geometry.width/2;
break;
}
case CenterGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width/2;
splice_geometry.y+=(ssize_t) splice_geometry.height/2;
break;
}
case EastGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width;
splice_geometry.y+=(ssize_t) splice_geometry.height/2;
break;
}
case SouthWestGravity:
{
splice_geometry.y+=(ssize_t) splice_geometry.height;
break;
}
case SouthGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width/2;
splice_geometry.y+=(ssize_t) splice_geometry.height;
break;
}
case SouthEastGravity:
{
splice_geometry.x+=(ssize_t) splice_geometry.width;
splice_geometry.y+=(ssize_t) splice_geometry.height;
break;
}
}
/*
Splice image.
*/
status=MagickTrue;
progress=0;
columns=MagickMin(splice_geometry.x,(ssize_t) splice_image->columns);
image_view=AcquireVirtualCacheView(image,exception);
splice_view=AcquireAuthenticCacheView(splice_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,splice_image,1,1)
#endif
for (y=0; y < (ssize_t) splice_geometry.y; y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,y,splice_image->columns,1,
exception);
q=QueueCacheViewAuthenticPixels(splice_view,0,y,splice_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,p) == 0)
{
SetPixelBackgoundColor(splice_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
if ((traits == UndefinedPixelTrait) ||
(splice_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(splice_image,channel,p[i],q);
}
SetPixelRed(splice_image,GetPixelRed(image,p),q);
SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
}
for ( ; x < (ssize_t) (splice_geometry.x+splice_geometry.width); x++)
q+=GetPixelChannels(splice_image);
for ( ; x < (ssize_t) splice_image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,p) == 0)
{
SetPixelBackgoundColor(splice_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
if ((traits == UndefinedPixelTrait) ||
(splice_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(splice_image,channel,p[i],q);
}
SetPixelRed(splice_image,GetPixelRed(image,p),q);
SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
}
if (SyncCacheViewAuthenticPixels(splice_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransposeImage)
#endif
proceed=SetImageProgress(image,SpliceImageTag,progress++,
splice_image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,splice_image,1,1)
#endif
for (y=(ssize_t) (splice_geometry.y+splice_geometry.height);
y < (ssize_t) splice_image->rows; y++)
{
register const Quantum
*magick_restrict p;
register ssize_t
x;
register Quantum
*magick_restrict q;
if (status == MagickFalse)
continue;
if ((y < 0) || (y >= (ssize_t)splice_image->rows))
continue;
p=GetCacheViewVirtualPixels(image_view,0,y-(ssize_t) splice_geometry.height,
splice_image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(splice_view,0,y,splice_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,q) == 0)
{
SetPixelBackgoundColor(splice_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
if ((traits == UndefinedPixelTrait) ||
(splice_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(splice_image,channel,p[i],q);
}
SetPixelRed(splice_image,GetPixelRed(image,p),q);
SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
}
for ( ; x < (ssize_t) (splice_geometry.x+splice_geometry.width); x++)
q+=GetPixelChannels(splice_image);
for ( ; x < (ssize_t) splice_image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,q) == 0)
{
SetPixelBackgoundColor(splice_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait splice_traits=GetPixelChannelTraits(splice_image,channel);
if ((traits == UndefinedPixelTrait) ||
(splice_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(splice_image,channel,p[i],q);
}
SetPixelRed(splice_image,GetPixelRed(image,p),q);
SetPixelGreen(splice_image,GetPixelGreen(image,p),q);
SetPixelBlue(splice_image,GetPixelBlue(image,p),q);
SetPixelAlpha(splice_image,GetPixelAlpha(image,p),q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(splice_image);
}
if (SyncCacheViewAuthenticPixels(splice_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransposeImage)
#endif
proceed=SetImageProgress(image,SpliceImageTag,progress++,
splice_image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
splice_view=DestroyCacheView(splice_view);
image_view=DestroyCacheView(image_view);
if (status == MagickFalse)
splice_image=DestroyImage(splice_image);
return(splice_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s f o r m I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransformImage() is a convenience method that behaves like ResizeImage() or
% CropImage() but accepts scaling and/or cropping information as a region
% geometry specification. If the operation fails, the original image handle
% is left as is.
%
% This should only be used for single images.
%
% This function destroys what it assumes to be a single image list.
% If the input image is part of a larger list, all other images in that list
% will be simply 'lost', not destroyed.
%
% Also if the crop generates a list of images only the first image is resized.
% And finally if the crop succeeds and the resize failed, you will get a
% cropped image, as well as a 'false' or 'failed' report.
%
% This function and should probably be deprecated in favor of direct calls
% to CropImageToTiles() or ResizeImage(), as appropriate.
%
% The format of the TransformImage method is:
%
% MagickBooleanType TransformImage(Image **image,const char *crop_geometry,
% const char *image_geometry,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image The transformed image is returned as this parameter.
%
% o crop_geometry: A crop geometry string. This geometry defines a
% subregion of the image to crop.
%
% o image_geometry: An image geometry string. This geometry defines the
% final size of the image.
%
% o exception: return any errors or warnings in this structure.
%
*/
MagickPrivate MagickBooleanType TransformImage(Image **image,
const char *crop_geometry,const char *image_geometry,ExceptionInfo *exception)
{
Image
*resize_image,
*transform_image;
RectangleInfo
geometry;
assert(image != (Image **) NULL);
assert((*image)->signature == MagickCoreSignature);
if ((*image)->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",(*image)->filename);
transform_image=(*image);
if (crop_geometry != (const char *) NULL)
{
Image
*crop_image;
/*
Crop image to a user specified size.
*/
crop_image=CropImageToTiles(*image,crop_geometry,exception);
if (crop_image == (Image *) NULL)
transform_image=CloneImage(*image,0,0,MagickTrue,exception);
else
{
transform_image=DestroyImage(transform_image);
transform_image=GetFirstImageInList(crop_image);
}
*image=transform_image;
}
if (image_geometry == (const char *) NULL)
return(MagickTrue);
/*
Scale image to a user specified size.
*/
(void) ParseRegionGeometry(transform_image,image_geometry,&geometry,exception);
if ((transform_image->columns == geometry.width) &&
(transform_image->rows == geometry.height))
return(MagickTrue);
resize_image=ResizeImage(transform_image,geometry.width,geometry.height,
transform_image->filter,exception);
if (resize_image == (Image *) NULL)
return(MagickFalse);
transform_image=DestroyImage(transform_image);
transform_image=resize_image;
*image=transform_image;
return(MagickTrue);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s p o s e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransposeImage() creates a horizontal mirror image by reflecting the pixels
% around the central y-axis while rotating them by 90 degrees.
%
% The format of the TransposeImage method is:
%
% Image *TransposeImage(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 Image *TransposeImage(const Image *image,ExceptionInfo *exception)
{
#define TransposeImageTag "Transpose/Image"
CacheView
*image_view,
*transpose_view;
Image
*transpose_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
page;
ssize_t
y;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
transpose_image=CloneImage(image,image->rows,image->columns,MagickTrue,
exception);
if (transpose_image == (Image *) NULL)
return((Image *) NULL);
/*
Transpose image.
*/
status=MagickTrue;
progress=0;
image_view=AcquireVirtualCacheView(image,exception);
transpose_view=AcquireAuthenticCacheView(transpose_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,transpose_image,image->rows,1)
#endif
for (y=0; y < (ssize_t) image->rows; y++)
{
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,(ssize_t) image->rows-y-1,
image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(transpose_view,(ssize_t) (image->rows-y-1),
0,1,transpose_image->rows,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) image->columns; x++)
{
register ssize_t
i;
if (GetPixelReadMask(image,q) == 0)
{
SetPixelBackgoundColor(transpose_image,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(transpose_image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait transpose_traits=GetPixelChannelTraits(transpose_image,
channel);
if ((traits == UndefinedPixelTrait) ||
(transpose_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(transpose_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
q+=GetPixelChannels(transpose_image);
}
if (SyncCacheViewAuthenticPixels(transpose_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransposeImage)
#endif
proceed=SetImageProgress(image,TransposeImageTag,progress++,
image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
transpose_view=DestroyCacheView(transpose_view);
image_view=DestroyCacheView(image_view);
transpose_image->type=image->type;
page=transpose_image->page;
Swap(page.width,page.height);
Swap(page.x,page.y);
transpose_image->page=page;
if (status == MagickFalse)
transpose_image=DestroyImage(transpose_image);
return(transpose_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s v e r s e I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransverseImage() creates a vertical mirror image by reflecting the pixels
% around the central x-axis while rotating them by 270 degrees.
%
% The format of the TransverseImage method is:
%
% Image *TransverseImage(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 Image *TransverseImage(const Image *image,ExceptionInfo *exception)
{
#define TransverseImageTag "Transverse/Image"
CacheView
*image_view,
*transverse_view;
Image
*transverse_image;
MagickBooleanType
status;
MagickOffsetType
progress;
RectangleInfo
page;
ssize_t
y;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
transverse_image=CloneImage(image,image->rows,image->columns,MagickTrue,
exception);
if (transverse_image == (Image *) NULL)
return((Image *) NULL);
/*
Transverse image.
*/
status=MagickTrue;
progress=0;
image_view=AcquireVirtualCacheView(image,exception);
transverse_view=AcquireAuthenticCacheView(transverse_image,exception);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(static,4) shared(progress,status) \
magick_threads(image,transverse_image,image->rows,1)
#endif
for (y=0; y < (ssize_t) image->rows; y++)
{
MagickBooleanType
sync;
register const Quantum
*magick_restrict p;
register Quantum
*magick_restrict q;
register ssize_t
x;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(transverse_view,(ssize_t) (image->rows-y-1),
0,1,transverse_image->rows,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
q+=GetPixelChannels(transverse_image)*image->columns;
for (x=0; x < (ssize_t) image->columns; x++)
{
register ssize_t
i;
q-=GetPixelChannels(transverse_image);
if (GetPixelReadMask(image,p) == 0)
{
p+=GetPixelChannels(image);
continue;
}
for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
{
PixelChannel channel=GetPixelChannelChannel(image,i);
PixelTrait traits=GetPixelChannelTraits(image,channel);
PixelTrait transverse_traits=GetPixelChannelTraits(transverse_image,
channel);
if ((traits == UndefinedPixelTrait) ||
(transverse_traits == UndefinedPixelTrait))
continue;
SetPixelChannel(transverse_image,channel,p[i],q);
}
p+=GetPixelChannels(image);
}
sync=SyncCacheViewAuthenticPixels(transverse_view,exception);
if (sync == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransverseImage)
#endif
proceed=SetImageProgress(image,TransverseImageTag,progress++,
image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
transverse_view=DestroyCacheView(transverse_view);
image_view=DestroyCacheView(image_view);
transverse_image->type=image->type;
page=transverse_image->page;
Swap(page.width,page.height);
Swap(page.x,page.y);
if (page.width != 0)
page.x=(ssize_t) (page.width-transverse_image->columns-page.x);
if (page.height != 0)
page.y=(ssize_t) (page.height-transverse_image->rows-page.y);
transverse_image->page=page;
if (status == MagickFalse)
transverse_image=DestroyImage(transverse_image);
return(transverse_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r i m I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TrimImage() trims pixels from the image edges. It allocates the memory
% necessary for the new Image structure and returns a pointer to the new
% image.
%
% The format of the TrimImage method is:
%
% Image *TrimImage(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 Image *TrimImage(const Image *image,ExceptionInfo *exception)
{
RectangleInfo
geometry;
assert(image != (const Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
geometry=GetImageBoundingBox(image,exception);
if ((geometry.width == 0) || (geometry.height == 0))
{
Image
*crop_image;
crop_image=CloneImage(image,1,1,MagickTrue,exception);
if (crop_image == (Image *) NULL)
return((Image *) NULL);
crop_image->background_color.alpha=(Quantum) TransparentAlpha;
crop_image->alpha_trait=BlendPixelTrait;
(void) SetImageBackgroundColor(crop_image,exception);
crop_image->page=image->page;
crop_image->page.x=(-1);
crop_image->page.y=(-1);
return(crop_image);
}
geometry.x+=image->page.x;
geometry.y+=image->page.y;
return(CropImage(image,&geometry,exception));
}