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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% PPPP AAA IIIII N N TTTTT %
% P P A A I NN N T %
% PPPP AAAAA I N N N T %
% P A A I N NN T %
% P A A IIIII N N T %
% %
% %
% Methods to Paint on an Image %
% %
% Software Design %
% John Cristy %
% July 1998 %
% %
% %
% Copyright 1999-2010 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 "magick/studio.h"
#include "magick/color.h"
#include "magick/color-private.h"
#include "magick/colorspace-private.h"
#include "magick/composite.h"
#include "magick/composite-private.h"
#include "magick/draw.h"
#include "magick/draw-private.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/gem.h"
#include "magick/monitor.h"
#include "magick/monitor-private.h"
#include "magick/paint.h"
#include "magick/pixel-private.h"
#include "magick/string_.h"
#include "magick/thread-private.h"
static inline double MagickMax(const double x,const double y)
{
return( x > y ? x : y);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% F l o o d f i l l P a i n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% FloodfillPaintImage() changes the color value of any pixel that matches
% target and is an immediate neighbor. If the method FillToBorderMethod is
% specified, the color value is changed for any neighbor pixel that does not
% match the bordercolor member of image.
%
% By default target must match a particular pixel color exactly.
% However, in many cases two colors may differ by a small amount. The
% fuzz member of image defines how much tolerance is acceptable to
% consider two colors as the same. For example, set fuzz to 10 and the
% color red at intensities of 100 and 102 respectively are now
% interpreted as the same color for the purposes of the floodfill.
%
% The format of the FloodfillPaintImage method is:
%
% MagickBooleanType FloodfillPaintImage(Image *image,
% const ChannelType channel,const DrawInfo *draw_info,
% const MagickPixelPacket target,const long x_offset,const long y_offset,
% const MagickBooleanType invert)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o channel: the channel(s).
%
% o draw_info: the draw info.
%
% o target: the RGB value of the target color.
%
% o x_offset,y_offset: the starting location of the operation.
%
% o invert: paint any pixel that does not match the target color.
%
*/
MagickExport MagickBooleanType FloodfillPaintImage(Image *image,
const ChannelType channel,const DrawInfo *draw_info,
const MagickPixelPacket *target,const long x_offset,const long y_offset,
const MagickBooleanType invert)
{
#define MaxStacksize (1UL << 15)
#define PushSegmentStack(up,left,right,delta) \
{ \
if (s >= (segment_stack+MaxStacksize)) \
ThrowBinaryException(DrawError,"SegmentStackOverflow",image->filename) \
else \
{ \
if ((((up)+(delta)) >= 0) && (((up)+(delta)) < (long) image->rows)) \
{ \
s->x1=(double) (left); \
s->y1=(double) (up); \
s->x2=(double) (right); \
s->y2=(double) (delta); \
s++; \
} \
} \
}
ExceptionInfo
*exception;
Image
*floodplane_image;
long
offset,
start,
x,
x1,
x2,
y;
MagickBooleanType
skip;
MagickPixelPacket
fill,
pixel;
PixelPacket
fill_color;
register SegmentInfo
*s;
SegmentInfo
*segment_stack;
/*
Check boundary conditions.
*/
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(draw_info != (DrawInfo *) NULL);
assert(draw_info->signature == MagickSignature);
if ((x_offset < 0) || (x_offset >= (long) image->columns))
return(MagickFalse);
if ((y_offset < 0) || (y_offset >= (long) image->rows))
return(MagickFalse);
if (SetImageStorageClass(image,DirectClass) == MagickFalse)
return(MagickFalse);
if (image->matte == MagickFalse)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
/*
Set floodfill state.
*/
floodplane_image=CloneImage(image,0,0,MagickTrue,&image->exception);
if (floodplane_image == (Image *) NULL)
return(MagickFalse);
(void) SetImageAlphaChannel(floodplane_image,OpaqueAlphaChannel);
segment_stack=(SegmentInfo *) AcquireQuantumMemory(MaxStacksize,
sizeof(*segment_stack));
if (segment_stack == (SegmentInfo *) NULL)
{
floodplane_image=DestroyImage(floodplane_image);
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
}
/*
Push initial segment on stack.
*/
exception=(&image->exception);
x=x_offset;
y=y_offset;
start=0;
s=segment_stack;
PushSegmentStack(y,x,x,1);
PushSegmentStack(y+1,x,x,-1);
GetMagickPixelPacket(image,&fill);
GetMagickPixelPacket(image,&pixel);
while (s > segment_stack)
{
register const IndexPacket
*restrict indexes;
register const PixelPacket
*restrict p;
register long
x;
register PixelPacket
*restrict q;
/*
Pop segment off stack.
*/
s--;
x1=(long) s->x1;
x2=(long) s->x2;
offset=(long) s->y2;
y=(long) s->y1+offset;
/*
Recolor neighboring pixels.
*/
p=GetVirtualPixels(image,0,y,(unsigned long) (x1+1),1,exception);
q=GetAuthenticPixels(floodplane_image,0,y,(unsigned long) (x1+1),1,
exception);
if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
break;
indexes=GetVirtualIndexQueue(image);
p+=x1;
q+=x1;
for (x=x1; x >= 0; x--)
{
if (q->opacity == (Quantum) TransparentOpacity)
break;
SetMagickPixelPacket(image,p,indexes+x,&pixel);
if (IsMagickColorSimilar(&pixel,target) == invert)
break;
q->opacity=(Quantum) TransparentOpacity;
p--;
q--;
}
if (SyncAuthenticPixels(floodplane_image,exception) == MagickFalse)
break;
skip=x >= x1 ? MagickTrue : MagickFalse;
if (skip == MagickFalse)
{
start=x+1;
if (start < x1)
PushSegmentStack(y,start,x1-1,-offset);
x=x1+1;
}
do
{
if (skip == MagickFalse)
{
if (x < (long) image->columns)
{
p=GetVirtualPixels(image,x,y,image->columns-x,1,exception);
q=GetAuthenticPixels(floodplane_image,x,y,image->columns-x,1,
exception);
if ((p == (const PixelPacket *) NULL) ||
(q == (PixelPacket *) NULL))
break;
indexes=GetVirtualIndexQueue(image);
for ( ; x < (long) image->columns; x++)
{
if (q->opacity == (Quantum) TransparentOpacity)
break;
SetMagickPixelPacket(image,p,indexes+x,&pixel);
if (IsMagickColorSimilar(&pixel,target) == invert)
break;
q->opacity=(Quantum) TransparentOpacity;
p++;
q++;
}
if (SyncAuthenticPixels(floodplane_image,exception) == MagickFalse)
break;
}
PushSegmentStack(y,start,x-1,offset);
if (x > (x2+1))
PushSegmentStack(y,x2+1,x-1,-offset);
}
skip=MagickFalse;
x++;
if (x <= x2)
{
p=GetVirtualPixels(image,x,y,(unsigned long) (x2-x+1),1,exception);
q=GetAuthenticPixels(floodplane_image,x,y,(unsigned long) (x2-x+1),1,
exception);
if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
break;
indexes=GetVirtualIndexQueue(image);
for ( ; x <= x2; x++)
{
if (q->opacity == (Quantum) TransparentOpacity)
break;
SetMagickPixelPacket(image,p,indexes+x,&pixel);
if (IsMagickColorSimilar(&pixel,target) != invert)
break;
p++;
q++;
}
}
start=x;
} while (x <= x2);
}
for (y=0; y < (long) image->rows; y++)
{
register const PixelPacket
*restrict p;
register IndexPacket
*restrict indexes;
register long
x;
register PixelPacket
*restrict q;
/*
Tile fill color onto floodplane.
*/
p=GetVirtualPixels(floodplane_image,0,y,image->columns,1,exception);
q=GetAuthenticPixels(image,0,y,image->columns,1,exception);
if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
break;
indexes=GetAuthenticIndexQueue(image);
for (x=0; x < (long) image->columns; x++)
{
if (p->opacity != OpaqueOpacity)
{
(void) GetFillColor(draw_info,x,y,&fill_color);
SetMagickPixelPacket(image,&fill_color,(IndexPacket *) NULL,&fill);
if (image->colorspace == CMYKColorspace)
ConvertRGBToCMYK(&fill);
if ((channel & RedChannel) != 0)
q->red=ClampToQuantum(fill.red);
if ((channel & GreenChannel) != 0)
q->green=ClampToQuantum(fill.green);
if ((channel & BlueChannel) != 0)
q->blue=ClampToQuantum(fill.blue);
if ((channel & OpacityChannel) != 0)
q->opacity=ClampToQuantum(fill.opacity);
if (((channel & IndexChannel) != 0) &&
(image->colorspace == CMYKColorspace))
indexes[x]=ClampToQuantum(fill.index);
}
p++;
q++;
}
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
}
segment_stack=(SegmentInfo *) RelinquishMagickMemory(segment_stack);
floodplane_image=DestroyImage(floodplane_image);
return(y == (long) image->rows ? MagickTrue : MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
+ G r a d i e n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% GradientImage() applies a continuously smooth color transitions along a
% vector from one color to another.
%
% Note, the interface of this method will change in the future to support
% more than one transistion.
%
% The format of the GradientImage method is:
%
% MagickBooleanType GradientImage(Image *image,const GradientType type,
% const SpreadMethod method,const PixelPacket *start_color,
% const PixelPacket *stop_color)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o type: the gradient type: linear or radial.
%
% o spread: the gradient spread meathod: pad, reflect, or repeat.
%
% o start_color: the start color.
%
% o stop_color: the stop color.
%
% This provides a good example of making use of the DrawGradientImage
% function and the gradient structure in draw_info.
*/
MagickExport MagickBooleanType GradientImage(Image *image,
const GradientType type,const SpreadMethod method,
const PixelPacket *start_color,const PixelPacket *stop_color)
{
DrawInfo
*draw_info;
GradientInfo
*gradient;
MagickBooleanType
status;
register long
i;
/*
Set gradient start-stop end points.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(start_color != (const PixelPacket *) NULL);
assert(stop_color != (const PixelPacket *) NULL);
draw_info=AcquireDrawInfo();
gradient=(&draw_info->gradient);
gradient->type=type;
gradient->bounding_box.width=image->columns;
gradient->bounding_box.height=image->rows;
gradient->gradient_vector.x2=(double) image->columns-1.0;
gradient->gradient_vector.y2=(double) image->rows-1.0;
if ((type == LinearGradient) && (gradient->gradient_vector.y2 != 0.0))
gradient->gradient_vector.x2=0.0;
gradient->center.x=(double) gradient->gradient_vector.x2/2.0;
gradient->center.y=(double) gradient->gradient_vector.y2/2.0;
gradient->radius=MagickMax(gradient->center.x,gradient->center.y);
gradient->spread=method;
/*
Define the gradient to fill between the stops.
*/
gradient->number_stops=2;
gradient->stops=(StopInfo *) AcquireQuantumMemory(gradient->number_stops,
sizeof(*gradient->stops));
if (gradient->stops == (StopInfo *) NULL)
ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
image->filename);
(void) ResetMagickMemory(gradient->stops,0,gradient->number_stops*
sizeof(*gradient->stops));
for (i=0; i < (long) gradient->number_stops; i++)
GetMagickPixelPacket(image,&gradient->stops[i].color);
SetMagickPixelPacket(image,start_color,(IndexPacket *) NULL,
&gradient->stops[0].color);
gradient->stops[0].offset=0.0;
SetMagickPixelPacket(image,stop_color,(IndexPacket *) NULL,
&gradient->stops[1].color);
gradient->stops[1].offset=1.0;
/*
Draw a gradient on the image.
*/
status=DrawGradientImage(image,draw_info);
draw_info=DestroyDrawInfo(draw_info);
if ((start_color->opacity == OpaqueOpacity) &&
(stop_color->opacity == OpaqueOpacity))
image->matte=MagickFalse;
if ((IsGrayPixel(start_color) != MagickFalse) &&
(IsGrayPixel(stop_color) != MagickFalse))
image->type=GrayscaleType;
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% O i l P a i n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% OilPaintImage() applies a special effect filter that simulates an oil
% painting. Each pixel is replaced by the most frequent color occurring
% in a circular region defined by radius.
%
% The format of the OilPaintImage method is:
%
% Image *OilPaintImage(const Image *image,const double radius,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o radius: the radius of the circular neighborhood.
%
% o exception: return any errors or warnings in this structure.
%
*/
static unsigned long **DestroyHistogramThreadSet(unsigned long **histogram)
{
register long
i;
assert(histogram != (unsigned long **) NULL);
for (i=0; i < (long) GetOpenMPMaximumThreads(); i++)
if (histogram[i] != (unsigned long *) NULL)
histogram[i]=(unsigned long *) RelinquishMagickMemory(histogram[i]);
histogram=(unsigned long **) RelinquishAlignedMemory(histogram);
return(histogram);
}
static unsigned long **AcquireHistogramThreadSet(const size_t count)
{
register long
i;
unsigned long
**histogram,
number_threads;
number_threads=GetOpenMPMaximumThreads();
histogram=(unsigned long **) AcquireAlignedMemory(number_threads,
sizeof(*histogram));
if (histogram == (unsigned long **) NULL)
return((unsigned long **) NULL);
(void) ResetMagickMemory(histogram,0,number_threads*sizeof(*histogram));
for (i=0; i < (long) number_threads; i++)
{
histogram[i]=(unsigned long *) AcquireQuantumMemory(count,
sizeof(**histogram));
if (histogram[i] == (unsigned long *) NULL)
return(DestroyHistogramThreadSet(histogram));
}
return(histogram);
}
MagickExport Image *OilPaintImage(const Image *image,const double radius,
ExceptionInfo *exception)
{
#define NumberPaintBins 256
#define OilPaintImageTag "OilPaint/Image"
CacheView
*image_view,
*paint_view;
Image
*paint_image;
long
progress,
y;
MagickBooleanType
status;
unsigned long
**restrict histograms,
width;
/*
Initialize painted image attributes.
*/
assert(image != (const Image *) NULL);
assert(image->signature == MagickSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickSignature);
width=GetOptimalKernelWidth2D(radius,0.5);
if ((image->columns < width) || (image->rows < width))
ThrowImageException(OptionError,"ImageSmallerThanRadius");
paint_image=CloneImage(image,image->columns,image->rows,MagickTrue,exception);
if (paint_image == (Image *) NULL)
return((Image *) NULL);
if (SetImageStorageClass(paint_image,DirectClass) == MagickFalse)
{
InheritException(exception,&paint_image->exception);
paint_image=DestroyImage(paint_image);
return((Image *) NULL);
}
histograms=AcquireHistogramThreadSet(NumberPaintBins);
if (histograms == (unsigned long **) NULL)
{
paint_image=DestroyImage(paint_image);
ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
}
/*
Oil paint image.
*/
status=MagickTrue;
progress=0;
image_view=AcquireCacheView(image);
paint_view=AcquireCacheView(paint_image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) image->rows; y++)
{
register const IndexPacket
*restrict indexes;
register const PixelPacket
*restrict p;
register IndexPacket
*restrict paint_indexes;
register long
x;
register PixelPacket
*restrict q;
register unsigned long
*histogram;
if (status == MagickFalse)
continue;
p=GetCacheViewVirtualPixels(image_view,-((long) width/2L),y-(long) (width/
2L),image->columns+width,width,exception);
q=QueueCacheViewAuthenticPixels(paint_view,0,y,paint_image->columns,1,
exception);
if ((p == (const PixelPacket *) NULL) || (q == (PixelPacket *) NULL))
{
status=MagickFalse;
continue;
}
indexes=GetCacheViewVirtualIndexQueue(image_view);
paint_indexes=GetCacheViewAuthenticIndexQueue(paint_view);
histogram=histograms[GetOpenMPThreadId()];
for (x=0; x < (long) image->columns; x++)
{
long
j,
k,
v;
register long
i,
u;
unsigned long
count;
/*
Assign most frequent color.
*/
i=0;
j=0;
count=0;
(void) ResetMagickMemory(histogram,0,NumberPaintBins*sizeof(*histogram));
for (v=0; v < (long) width; v++)
{
for (u=0; u < (long) width; u++)
{
k=(long) ScaleQuantumToChar(PixelIntensityToQuantum(p+u+i));
histogram[k]++;
if (histogram[k] > count)
{
j=i+u;
count=histogram[k];
}
}
i+=image->columns+width;
}
*q=(*(p+j));
if (image->colorspace == CMYKColorspace)
paint_indexes[x]=indexes[x+j];
p++;
q++;
}
if (SyncCacheViewAuthenticPixels(paint_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_OilPaintImage)
#endif
proceed=SetImageProgress(image,OilPaintImageTag,progress++,image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
paint_view=DestroyCacheView(paint_view);
image_view=DestroyCacheView(image_view);
histograms=DestroyHistogramThreadSet(histograms);
if (status == MagickFalse)
paint_image=DestroyImage(paint_image);
return(paint_image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% O p a q u e P a i n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% OpaquePaintImage() changes any pixel that matches color with the color
% defined by fill.
%
% By default color must match a particular pixel color exactly. However,
% in many cases two colors may differ by a small amount. Fuzz defines
% how much tolerance is acceptable to consider two colors as the same.
% For example, set fuzz to 10 and the color red at intensities of 100 and
% 102 respectively are now interpreted as the same color.
%
% The format of the OpaquePaintImage method is:
%
% MagickBooleanType OpaquePaintImage(Image *image,
% const PixelPacket *target,const PixelPacket *fill,
% const MagickBooleanType invert)
% MagickBooleanType OpaquePaintImageChannel(Image *image,
% const ChannelType channel,const PixelPacket *target,
% const PixelPacket *fill,const MagickBooleanType invert)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o channel: the channel(s).
%
% o target: the RGB value of the target color.
%
% o fill: the replacement color.
%
% o invert: paint any pixel that does not match the target color.
%
*/
MagickExport MagickBooleanType OpaquePaintImage(Image *image,
const MagickPixelPacket *target,const MagickPixelPacket *fill,
const MagickBooleanType invert)
{
return(OpaquePaintImageChannel(image,AllChannels,target,fill,invert));
}
MagickExport MagickBooleanType OpaquePaintImageChannel(Image *image,
const ChannelType channel,const MagickPixelPacket *target,
const MagickPixelPacket *fill,const MagickBooleanType invert)
{
#define OpaquePaintImageTag "Opaque/Image"
CacheView
*image_view;
ExceptionInfo
*exception;
long
progress,
y;
MagickBooleanType
status;
MagickPixelPacket
zero;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(target != (MagickPixelPacket *) NULL);
assert(fill != (MagickPixelPacket *) NULL);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
if (SetImageStorageClass(image,DirectClass) == MagickFalse)
return(MagickFalse);
/*
Make image color opaque.
*/
status=MagickTrue;
progress=0;
exception=(&image->exception);
GetMagickPixelPacket(image,&zero);
image_view=AcquireCacheView(image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) image->rows; y++)
{
MagickPixelPacket
pixel;
register IndexPacket
*restrict indexes;
register long
x;
register PixelPacket
*restrict q;
if (status == MagickFalse)
continue;
q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
{
status=MagickFalse;
continue;
}
indexes=GetCacheViewAuthenticIndexQueue(image_view);
pixel=zero;
for (x=0; x < (long) image->columns; x++)
{
SetMagickPixelPacket(image,q,indexes+x,&pixel);
if (IsMagickColorSimilar(&pixel,target) != invert)
{
if ((channel & RedChannel) != 0)
q->red=ClampToQuantum(fill->red);
if ((channel & GreenChannel) != 0)
q->green=ClampToQuantum(fill->green);
if ((channel & BlueChannel) != 0)
q->blue=ClampToQuantum(fill->blue);
if ((channel & OpacityChannel) != 0)
q->opacity=ClampToQuantum(fill->opacity);
if (((channel & IndexChannel) != 0) &&
(image->colorspace == CMYKColorspace))
indexes[x]=ClampToQuantum(fill->index);
}
q++;
}
if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_OpaquePaintImageChannel)
#endif
proceed=SetImageProgress(image,OpaquePaintImageTag,progress++,
image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
image_view=DestroyCacheView(image_view);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s p a r e n t P a i n t I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransparentPaintImage() changes the opacity value associated with any pixel
% that matches color to the value defined by opacity.
%
% By default color must match a particular pixel color exactly. However,
% in many cases two colors may differ by a small amount. Fuzz defines
% how much tolerance is acceptable to consider two colors as the same.
% For example, set fuzz to 10 and the color red at intensities of 100 and
% 102 respectively are now interpreted as the same color.
%
% The format of the TransparentPaintImage method is:
%
% MagickBooleanType TransparentPaintImage(Image *image,
% const MagickPixelPacket *target,const Quantum opacity,
% const MagickBooleanType invert)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o target: the target color.
%
% o opacity: the replacement opacity value.
%
% o invert: paint any pixel that does not match the target color.
%
*/
MagickExport MagickBooleanType TransparentPaintImage(Image *image,
const MagickPixelPacket *target,const Quantum opacity,
const MagickBooleanType invert)
{
#define TransparentPaintImageTag "Transparent/Image"
CacheView
*image_view;
ExceptionInfo
*exception;
long
progress,
y;
MagickBooleanType
status;
MagickPixelPacket
zero;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(target != (MagickPixelPacket *) NULL);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
if (SetImageStorageClass(image,DirectClass) == MagickFalse)
return(MagickFalse);
if (image->matte == MagickFalse)
(void) SetImageAlphaChannel(image,OpaqueAlphaChannel);
/*
Make image color transparent.
*/
status=MagickTrue;
progress=0;
exception=(&image->exception);
GetMagickPixelPacket(image,&zero);
image_view=AcquireCacheView(image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) image->rows; y++)
{
MagickPixelPacket
pixel;
register IndexPacket
*restrict indexes;
register long
x;
register PixelPacket
*restrict q;
if (status == MagickFalse)
continue;
q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
{
status=MagickFalse;
continue;
}
indexes=GetCacheViewAuthenticIndexQueue(image_view);
pixel=zero;
for (x=0; x < (long) image->columns; x++)
{
SetMagickPixelPacket(image,q,indexes+x,&pixel);
if (IsMagickColorSimilar(&pixel,target) != invert)
q->opacity=opacity;
q++;
}
if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransparentPaintImage)
#endif
proceed=SetImageProgress(image,TransparentPaintImageTag,progress++,
image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
image_view=DestroyCacheView(image_view);
return(status);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% T r a n s p a r e n t P a i n t I m a g e C h r o m a %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% TransparentPaintImageChroma() changes the opacity value associated with any
% pixel that matches color to the value defined by opacity.
%
% As there is one fuzz value for the all the channels, the
% TransparentPaintImage() API is not suitable for the operations like chroma,
% where the tolerance for similarity of two color component (RGB) can be
% different, Thus we define this method take two target pixels (one
% low and one hight) and all the pixels of an image which are lying between
% these two pixels are made transparent.
%
% The format of the TransparentPaintImage method is:
%
% MagickBooleanType TransparentPaintImage(Image *image,
% const MagickPixelPacket *low,const MagickPixelPacket *hight,
% const Quantum opacity,const MagickBooleanType invert)
%
% A description of each parameter follows:
%
% o image: the image.
%
% o low: the low target color.
%
% o high: the high target color.
%
% o opacity: the replacement opacity value.
%
% o invert: paint any pixel that does not match the target color.
%
*/
MagickExport MagickBooleanType TransparentPaintImageChroma(Image *image,
const MagickPixelPacket *low,const MagickPixelPacket *high,
const Quantum opacity,const MagickBooleanType invert)
{
#define TransparentPaintImageTag "Transparent/Image"
CacheView
*image_view;
ExceptionInfo
*exception;
long
progress,
y;
MagickBooleanType
status;
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
assert(high != (MagickPixelPacket *) NULL);
assert(low != (MagickPixelPacket *) NULL);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
if (SetImageStorageClass(image,DirectClass) == MagickFalse)
return(MagickFalse);
if (image->matte == MagickFalse)
(void) SetImageAlphaChannel(image,ResetAlphaChannel);
/*
Make image color transparent.
*/
status=MagickTrue;
progress=0;
exception=(&image->exception);
image_view=AcquireCacheView(image);
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp parallel for schedule(dynamic,4) shared(progress,status)
#endif
for (y=0; y < (long) image->rows; y++)
{
MagickBooleanType
match;
MagickPixelPacket
pixel;
register IndexPacket
*restrict indexes;
register long
x;
register PixelPacket
*restrict q;
if (status == MagickFalse)
continue;
q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
if (q == (PixelPacket *) NULL)
{
status=MagickFalse;
continue;
}
indexes=GetCacheViewAuthenticIndexQueue(image_view);
GetMagickPixelPacket(image,&pixel);
for (x=0; x < (long) image->columns; x++)
{
SetMagickPixelPacket(image,q,indexes+x,&pixel);
match=((pixel.red >= low->red) && (pixel.red <= high->red) &&
(pixel.green >= low->green) && (pixel.green <= high->green) &&
(pixel.blue >= low->blue) && (pixel.blue <= high->blue)) ?
MagickTrue : MagickFalse;
if (match != invert)
q->opacity=opacity;
q++;
}
if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
status=MagickFalse;
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
MagickBooleanType
proceed;
#if defined(MAGICKCORE_OPENMP_SUPPORT)
#pragma omp critical (MagickCore_TransparentPaintImageChroma)
#endif
proceed=SetImageProgress(image,TransparentPaintImageTag,progress++,
image->rows);
if (proceed == MagickFalse)
status=MagickFalse;
}
}
image_view=DestroyCacheView(image_view);
return(status);
}