--- /dev/null
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% FFFFF X X %
+% F X X %
+% FFF X %
+% F X X %
+% F X X %
+% %
+% %
+% MagickCore Image Special Effects Methods %
+% %
+% Software Design %
+% Cristy %
+% October 1996 %
+% %
+% %
+% Copyright 1999-2018 ImageMagick Studio LLC, a non-profit organization %
+% dedicated to making software imaging solutions freely available. %
+% %
+% You may not use this file except in compliance with the License. You may %
+% obtain a copy of the License at %
+% %
+% https://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. %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%
+%
+*/
+\f
+/*
+ Include declarations.
+*/
+#include "MagickCore/studio.h"
+#include "MagickCore/accelerate-private.h"
+#include "MagickCore/annotate.h"
+#include "MagickCore/artifact.h"
+#include "MagickCore/attribute.h"
+#include "MagickCore/cache.h"
+#include "MagickCore/cache-view.h"
+#include "MagickCore/channel.h"
+#include "MagickCore/color.h"
+#include "MagickCore/color-private.h"
+#include "MagickCore/colorspace-private.h"
+#include "MagickCore/composite.h"
+#include "MagickCore/decorate.h"
+#include "MagickCore/distort.h"
+#include "MagickCore/draw.h"
+#include "MagickCore/effect.h"
+#include "MagickCore/enhance.h"
+#include "MagickCore/exception.h"
+#include "MagickCore/exception-private.h"
+#include "MagickCore/fx.h"
+#include "MagickCore/fx-private.h"
+#include "MagickCore/gem.h"
+#include "MagickCore/gem-private.h"
+#include "MagickCore/geometry.h"
+#include "MagickCore/layer.h"
+#include "MagickCore/list.h"
+#include "MagickCore/log.h"
+#include "MagickCore/image.h"
+#include "MagickCore/image-private.h"
+#include "MagickCore/magick.h"
+#include "MagickCore/memory_.h"
+#include "MagickCore/memory-private.h"
+#include "MagickCore/monitor.h"
+#include "MagickCore/monitor-private.h"
+#include "MagickCore/option.h"
+#include "MagickCore/pixel.h"
+#include "MagickCore/pixel-accessor.h"
+#include "MagickCore/property.h"
+#include "MagickCore/quantum.h"
+#include "MagickCore/quantum-private.h"
+#include "MagickCore/random_.h"
+#include "MagickCore/random-private.h"
+#include "MagickCore/resample.h"
+#include "MagickCore/resample-private.h"
+#include "MagickCore/resize.h"
+#include "MagickCore/resource_.h"
+#include "MagickCore/splay-tree.h"
+#include "MagickCore/statistic.h"
+#include "MagickCore/string_.h"
+#include "MagickCore/string-private.h"
+#include "MagickCore/thread-private.h"
+#include "MagickCore/transform.h"
+#include "MagickCore/transform-private.h"
+#include "MagickCore/utility.h"
+\f
+/*
+ Define declarations.
+*/
+#define LeftShiftOperator 0xf5U
+#define RightShiftOperator 0xf6U
+#define LessThanEqualOperator 0xf7U
+#define GreaterThanEqualOperator 0xf8U
+#define EqualOperator 0xf9U
+#define NotEqualOperator 0xfaU
+#define LogicalAndOperator 0xfbU
+#define LogicalOrOperator 0xfcU
+#define ExponentialNotation 0xfdU
+
+struct _FxInfo
+{
+ const Image
+ *images;
+
+ char
+ *expression;
+
+ FILE
+ *file;
+
+ SplayTreeInfo
+ *colors,
+ *symbols;
+
+ CacheView
+ **view;
+
+ RandomInfo
+ *random_info;
+
+ ExceptionInfo
+ *exception;
+};
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
++ A c q u i r e F x I n f o %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% AcquireFxInfo() allocates the FxInfo structure.
+%
+% The format of the AcquireFxInfo method is:
+%
+% FxInfo *AcquireFxInfo(Image *images,const char *expression,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o images: the image sequence.
+%
+% o expression: the expression.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickPrivate FxInfo *AcquireFxInfo(const Image *images,const char *expression,
+ ExceptionInfo *exception)
+{
+ char
+ fx_op[2];
+
+ const Image
+ *next;
+
+ FxInfo
+ *fx_info;
+
+ register ssize_t
+ i;
+
+ fx_info=(FxInfo *) AcquireCriticalMemory(sizeof(*fx_info));
+ (void) memset(fx_info,0,sizeof(*fx_info));
+ fx_info->exception=AcquireExceptionInfo();
+ fx_info->images=images;
+ fx_info->colors=NewSplayTree(CompareSplayTreeString,RelinquishMagickMemory,
+ RelinquishMagickMemory);
+ fx_info->symbols=NewSplayTree(CompareSplayTreeString,RelinquishMagickMemory,
+ RelinquishMagickMemory);
+ fx_info->view=(CacheView **) AcquireQuantumMemory(GetImageListLength(
+ fx_info->images),sizeof(*fx_info->view));
+ if (fx_info->view == (CacheView **) NULL)
+ ThrowFatalException(ResourceLimitFatalError,"MemoryAllocationFailed");
+ i=0;
+ next=GetFirstImageInList(fx_info->images);
+ for ( ; next != (Image *) NULL; next=next->next)
+ {
+ fx_info->view[i]=AcquireVirtualCacheView(next,exception);
+ i++;
+ }
+ fx_info->random_info=AcquireRandomInfo();
+ fx_info->expression=ConstantString(expression);
+ fx_info->file=stderr;
+ (void) SubstituteString(&fx_info->expression," ",""); /* compact string */
+ /*
+ Force right-to-left associativity for unary negation.
+ */
+ (void) SubstituteString(&fx_info->expression,"-","-1.0*");
+ (void) SubstituteString(&fx_info->expression,"^-1.0*","^-");
+ (void) SubstituteString(&fx_info->expression,"E-1.0*","E-");
+ (void) SubstituteString(&fx_info->expression,"e-1.0*","e-");
+ /*
+ Convert compound to simple operators.
+ */
+ fx_op[1]='\0';
+ *fx_op=(char) LeftShiftOperator;
+ (void) SubstituteString(&fx_info->expression,"<<",fx_op);
+ *fx_op=(char) RightShiftOperator;
+ (void) SubstituteString(&fx_info->expression,">>",fx_op);
+ *fx_op=(char) LessThanEqualOperator;
+ (void) SubstituteString(&fx_info->expression,"<=",fx_op);
+ *fx_op=(char) GreaterThanEqualOperator;
+ (void) SubstituteString(&fx_info->expression,">=",fx_op);
+ *fx_op=(char) EqualOperator;
+ (void) SubstituteString(&fx_info->expression,"==",fx_op);
+ *fx_op=(char) NotEqualOperator;
+ (void) SubstituteString(&fx_info->expression,"!=",fx_op);
+ *fx_op=(char) LogicalAndOperator;
+ (void) SubstituteString(&fx_info->expression,"&&",fx_op);
+ *fx_op=(char) LogicalOrOperator;
+ (void) SubstituteString(&fx_info->expression,"||",fx_op);
+ *fx_op=(char) ExponentialNotation;
+ (void) SubstituteString(&fx_info->expression,"**",fx_op);
+ return(fx_info);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% A d d N o i s e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% AddNoiseImage() adds random noise to the image.
+%
+% The format of the AddNoiseImage method is:
+%
+% Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
+% const double attenuate,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o channel: the channel type.
+%
+% o noise_type: The type of noise: Uniform, Gaussian, Multiplicative,
+% Impulse, Laplacian, or Poisson.
+%
+% o attenuate: attenuate the random distribution.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *AddNoiseImage(const Image *image,const NoiseType noise_type,
+ const double attenuate,ExceptionInfo *exception)
+{
+#define AddNoiseImageTag "AddNoise/Image"
+
+ CacheView
+ *image_view,
+ *noise_view;
+
+ Image
+ *noise_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ RandomInfo
+ **magick_restrict random_info;
+
+ ssize_t
+ y;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ unsigned long
+ key;
+#endif
+
+ /*
+ Initialize noise 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);
+#if defined(MAGICKCORE_OPENCL_SUPPORT)
+ noise_image=AccelerateAddNoiseImage(image,noise_type,attenuate,exception);
+ if (noise_image != (Image *) NULL)
+ return(noise_image);
+#endif
+ noise_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (noise_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(noise_image,DirectClass,exception) == MagickFalse)
+ {
+ noise_image=DestroyImage(noise_image);
+ return((Image *) NULL);
+ }
+ /*
+ Add noise in each row.
+ */
+ status=MagickTrue;
+ progress=0;
+ random_info=AcquireRandomInfoThreadSet();
+ image_view=AcquireVirtualCacheView(image,exception);
+ noise_view=AcquireAuthenticCacheView(noise_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ key=GetRandomSecretKey(random_info[0]);
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,noise_image,image->rows,key == ~0UL)
+#endif
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ const int
+ id = GetOpenMPThreadId();
+
+ MagickBooleanType
+ sync;
+
+ 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(noise_view,0,y,noise_image->columns,1,
+ 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;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ PixelTrait noise_traits=GetPixelChannelTraits(noise_image,channel);
+ if ((traits == UndefinedPixelTrait) ||
+ (noise_traits == UndefinedPixelTrait))
+ continue;
+ if ((noise_traits & CopyPixelTrait) != 0)
+ {
+ SetPixelChannel(noise_image,channel,p[i],q);
+ continue;
+ }
+ SetPixelChannel(noise_image,channel,ClampToQuantum(
+ GenerateDifferentialNoise(random_info[id],p[i],noise_type,attenuate)),
+ q);
+ }
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(noise_image);
+ }
+ sync=SyncCacheViewAuthenticPixels(noise_view,exception);
+ if (sync == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_AddNoiseImage)
+#endif
+ proceed=SetImageProgress(image,AddNoiseImageTag,progress++,
+ image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ noise_view=DestroyCacheView(noise_view);
+ image_view=DestroyCacheView(image_view);
+ random_info=DestroyRandomInfoThreadSet(random_info);
+ if (status == MagickFalse)
+ noise_image=DestroyImage(noise_image);
+ return(noise_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% B l u e S h i f t I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% BlueShiftImage() mutes the colors of the image to simulate a scene at
+% nighttime in the moonlight.
+%
+% The format of the BlueShiftImage method is:
+%
+% Image *BlueShiftImage(const Image *image,const double factor,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o factor: the shift factor.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *BlueShiftImage(const Image *image,const double factor,
+ ExceptionInfo *exception)
+{
+#define BlueShiftImageTag "BlueShift/Image"
+
+ CacheView
+ *image_view,
+ *shift_view;
+
+ Image
+ *shift_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ ssize_t
+ y;
+
+ /*
+ Allocate blue shift image.
+ */
+ 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);
+ shift_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (shift_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(shift_image,DirectClass,exception) == MagickFalse)
+ {
+ shift_image=DestroyImage(shift_image);
+ return((Image *) NULL);
+ }
+ /*
+ Blue-shift DirectClass image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(image,exception);
+ shift_view=AcquireAuthenticCacheView(shift_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,shift_image,image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ MagickBooleanType
+ sync;
+
+ PixelInfo
+ pixel;
+
+ Quantum
+ quantum;
+
+ 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(shift_view,0,y,shift_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ quantum=GetPixelRed(image,p);
+ if (GetPixelGreen(image,p) < quantum)
+ quantum=GetPixelGreen(image,p);
+ if (GetPixelBlue(image,p) < quantum)
+ quantum=GetPixelBlue(image,p);
+ pixel.red=0.5*(GetPixelRed(image,p)+factor*quantum);
+ pixel.green=0.5*(GetPixelGreen(image,p)+factor*quantum);
+ pixel.blue=0.5*(GetPixelBlue(image,p)+factor*quantum);
+ quantum=GetPixelRed(image,p);
+ if (GetPixelGreen(image,p) > quantum)
+ quantum=GetPixelGreen(image,p);
+ if (GetPixelBlue(image,p) > quantum)
+ quantum=GetPixelBlue(image,p);
+ pixel.red=0.5*(pixel.red+factor*quantum);
+ pixel.green=0.5*(pixel.green+factor*quantum);
+ pixel.blue=0.5*(pixel.blue+factor*quantum);
+ SetPixelRed(shift_image,ClampToQuantum(pixel.red),q);
+ SetPixelGreen(shift_image,ClampToQuantum(pixel.green),q);
+ SetPixelBlue(shift_image,ClampToQuantum(pixel.blue),q);
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(shift_image);
+ }
+ sync=SyncCacheViewAuthenticPixels(shift_view,exception);
+ if (sync == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_BlueShiftImage)
+#endif
+ proceed=SetImageProgress(image,BlueShiftImageTag,progress++,
+ image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ image_view=DestroyCacheView(image_view);
+ shift_view=DestroyCacheView(shift_view);
+ if (status == MagickFalse)
+ shift_image=DestroyImage(shift_image);
+ return(shift_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% C h a r c o a l I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% CharcoalImage() creates a new image that is a copy of an existing one with
+% the edge highlighted. It allocates the memory necessary for the new Image
+% structure and returns a pointer to the new image.
+%
+% The format of the CharcoalImage method is:
+%
+% Image *CharcoalImage(const Image *image,const double radius,
+% const double sigma,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o radius: the radius of the pixel neighborhood.
+%
+% o sigma: the standard deviation of the Gaussian, in pixels.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *CharcoalImage(const Image *image,const double radius,
+ const double sigma,ExceptionInfo *exception)
+{
+ Image
+ *charcoal_image,
+ *clone_image,
+ *edge_image;
+
+ assert(image != (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);
+ clone_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (clone_image == (Image *) NULL)
+ return((Image *) NULL);
+ edge_image=EdgeImage(clone_image,radius,exception);
+ clone_image=DestroyImage(clone_image);
+ if (edge_image == (Image *) NULL)
+ return((Image *) NULL);
+ charcoal_image=BlurImage(edge_image,radius,sigma,exception);
+ edge_image=DestroyImage(edge_image);
+ if (charcoal_image == (Image *) NULL)
+ return((Image *) NULL);
+ (void) NormalizeImage(charcoal_image,exception);
+ (void) NegateImage(charcoal_image,MagickFalse,exception);
+ (void) GrayscaleImage(charcoal_image,image->intensity,exception);
+ return(charcoal_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% C o l o r i z e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ColorizeImage() blends the fill color with each pixel in the image.
+% A percentage blend is specified with opacity. Control the application
+% of different color components by specifying a different percentage for
+% each component (e.g. 90/100/10 is 90% red, 100% green, and 10% blue).
+%
+% The format of the ColorizeImage method is:
+%
+% Image *ColorizeImage(const Image *image,const char *blend,
+% const PixelInfo *colorize,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o blend: A character string indicating the level of blending as a
+% percentage.
+%
+% o colorize: A color value.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *ColorizeImage(const Image *image,const char *blend,
+ const PixelInfo *colorize,ExceptionInfo *exception)
+{
+#define ColorizeImageTag "Colorize/Image"
+#define Colorize(pixel,blend_percentage,colorize) \
+ (((pixel)*(100.0-(blend_percentage))+(colorize)*(blend_percentage))/100.0)
+
+ CacheView
+ *image_view;
+
+ GeometryInfo
+ geometry_info;
+
+ Image
+ *colorize_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ MagickStatusType
+ flags;
+
+ PixelInfo
+ blend_percentage;
+
+ ssize_t
+ y;
+
+ /*
+ Allocate colorized image.
+ */
+ 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);
+ colorize_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (colorize_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(colorize_image,DirectClass,exception) == MagickFalse)
+ {
+ colorize_image=DestroyImage(colorize_image);
+ return((Image *) NULL);
+ }
+ if ((IsGrayColorspace(colorize_image->colorspace) != MagickFalse) ||
+ (IsPixelInfoGray(colorize) != MagickFalse))
+ (void) SetImageColorspace(colorize_image,sRGBColorspace,exception);
+ if ((colorize_image->alpha_trait == UndefinedPixelTrait) &&
+ (colorize->alpha_trait != UndefinedPixelTrait))
+ (void) SetImageAlpha(colorize_image,OpaqueAlpha,exception);
+ if (blend == (const char *) NULL)
+ return(colorize_image);
+ GetPixelInfo(colorize_image,&blend_percentage);
+ flags=ParseGeometry(blend,&geometry_info);
+ blend_percentage.red=geometry_info.rho;
+ blend_percentage.green=geometry_info.rho;
+ blend_percentage.blue=geometry_info.rho;
+ blend_percentage.black=geometry_info.rho;
+ blend_percentage.alpha=(MagickRealType) TransparentAlpha;
+ if ((flags & SigmaValue) != 0)
+ blend_percentage.green=geometry_info.sigma;
+ if ((flags & XiValue) != 0)
+ blend_percentage.blue=geometry_info.xi;
+ if ((flags & PsiValue) != 0)
+ blend_percentage.alpha=geometry_info.psi;
+ if (blend_percentage.colorspace == CMYKColorspace)
+ {
+ if ((flags & PsiValue) != 0)
+ blend_percentage.black=geometry_info.psi;
+ if ((flags & ChiValue) != 0)
+ blend_percentage.alpha=geometry_info.chi;
+ }
+ /*
+ Colorize DirectClass image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(colorize_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(colorize_image,colorize_image,colorize_image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) colorize_image->rows; y++)
+ {
+ MagickBooleanType
+ sync;
+
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ if (status == MagickFalse)
+ continue;
+ q=GetCacheViewAuthenticPixels(image_view,0,y,colorize_image->columns,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) colorize_image->columns; x++)
+ {
+ register ssize_t
+ i;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(colorize_image); i++)
+ {
+ PixelTrait traits = GetPixelChannelTraits(colorize_image,
+ (PixelChannel) i);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ if ((traits & CopyPixelTrait) != 0)
+ continue;
+ SetPixelChannel(colorize_image,(PixelChannel) i,ClampToQuantum(
+ Colorize(q[i],GetPixelInfoChannel(&blend_percentage,(PixelChannel) i),
+ GetPixelInfoChannel(colorize,(PixelChannel) i))),q);
+ }
+ q+=GetPixelChannels(colorize_image);
+ }
+ sync=SyncCacheViewAuthenticPixels(image_view,exception);
+ if (sync == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_ColorizeImage)
+#endif
+ proceed=SetImageProgress(image,ColorizeImageTag,progress++,
+ colorize_image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ image_view=DestroyCacheView(image_view);
+ if (status == MagickFalse)
+ colorize_image=DestroyImage(colorize_image);
+ return(colorize_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% C o l o r M a t r i x I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ColorMatrixImage() applies color transformation to an image. This method
+% permits saturation changes, hue rotation, luminance to alpha, and various
+% other effects. Although variable-sized transformation matrices can be used,
+% typically one uses a 5x5 matrix for an RGBA image and a 6x6 for CMYKA
+% (or RGBA with offsets). The matrix is similar to those used by Adobe Flash
+% except offsets are in column 6 rather than 5 (in support of CMYKA images)
+% and offsets are normalized (divide Flash offset by 255).
+%
+% The format of the ColorMatrixImage method is:
+%
+% Image *ColorMatrixImage(const Image *image,
+% const KernelInfo *color_matrix,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o color_matrix: the color matrix.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+/* FUTURE: modify to make use of a MagickMatrix Mutliply function
+ That should be provided in "matrix.c"
+ (ASIDE: actually distorts should do this too but currently doesn't)
+*/
+
+MagickExport Image *ColorMatrixImage(const Image *image,
+ const KernelInfo *color_matrix,ExceptionInfo *exception)
+{
+#define ColorMatrixImageTag "ColorMatrix/Image"
+
+ CacheView
+ *color_view,
+ *image_view;
+
+ double
+ ColorMatrix[6][6] =
+ {
+ { 1.0, 0.0, 0.0, 0.0, 0.0, 0.0 },
+ { 0.0, 1.0, 0.0, 0.0, 0.0, 0.0 },
+ { 0.0, 0.0, 1.0, 0.0, 0.0, 0.0 },
+ { 0.0, 0.0, 0.0, 1.0, 0.0, 0.0 },
+ { 0.0, 0.0, 0.0, 0.0, 1.0, 0.0 },
+ { 0.0, 0.0, 0.0, 0.0, 0.0, 1.0 }
+ };
+
+ Image
+ *color_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ register ssize_t
+ i;
+
+ ssize_t
+ u,
+ v,
+ y;
+
+ /*
+ Map given color_matrix, into a 6x6 matrix RGBKA and a constant
+ */
+ assert(image != (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);
+ i=0;
+ for (v=0; v < (ssize_t) color_matrix->height; v++)
+ for (u=0; u < (ssize_t) color_matrix->width; u++)
+ {
+ if ((v < 6) && (u < 6))
+ ColorMatrix[v][u]=color_matrix->values[i];
+ i++;
+ }
+ /*
+ Initialize color image.
+ */
+ color_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (color_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(color_image,DirectClass,exception) == MagickFalse)
+ {
+ color_image=DestroyImage(color_image);
+ return((Image *) NULL);
+ }
+ if (image->debug != MagickFalse)
+ {
+ char
+ format[MagickPathExtent],
+ *message;
+
+ (void) LogMagickEvent(TransformEvent,GetMagickModule(),
+ " ColorMatrix image with color matrix:");
+ message=AcquireString("");
+ for (v=0; v < 6; v++)
+ {
+ *message='\0';
+ (void) FormatLocaleString(format,MagickPathExtent,"%.20g: ",(double) v);
+ (void) ConcatenateString(&message,format);
+ for (u=0; u < 6; u++)
+ {
+ (void) FormatLocaleString(format,MagickPathExtent,"%+f ",
+ ColorMatrix[v][u]);
+ (void) ConcatenateString(&message,format);
+ }
+ (void) LogMagickEvent(TransformEvent,GetMagickModule(),"%s",message);
+ }
+ message=DestroyString(message);
+ }
+ /*
+ Apply the ColorMatrix to image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(image,exception);
+ color_view=AcquireAuthenticCacheView(color_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,color_image,image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ PixelInfo
+ pixel;
+
+ 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=GetCacheViewAuthenticPixels(color_view,0,y,color_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ GetPixelInfo(image,&pixel);
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ register ssize_t
+ v;
+
+ size_t
+ height;
+
+ GetPixelInfoPixel(image,p,&pixel);
+ height=color_matrix->height > 6 ? 6UL : color_matrix->height;
+ for (v=0; v < (ssize_t) height; v++)
+ {
+ double
+ sum;
+
+ sum=ColorMatrix[v][0]*GetPixelRed(image,p)+ColorMatrix[v][1]*
+ GetPixelGreen(image,p)+ColorMatrix[v][2]*GetPixelBlue(image,p);
+ if (image->colorspace == CMYKColorspace)
+ sum+=ColorMatrix[v][3]*GetPixelBlack(image,p);
+ if (image->alpha_trait != UndefinedPixelTrait)
+ sum+=ColorMatrix[v][4]*GetPixelAlpha(image,p);
+ sum+=QuantumRange*ColorMatrix[v][5];
+ switch (v)
+ {
+ case 0: pixel.red=sum; break;
+ case 1: pixel.green=sum; break;
+ case 2: pixel.blue=sum; break;
+ case 3: pixel.black=sum; break;
+ case 4: pixel.alpha=sum; break;
+ default: break;
+ }
+ }
+ SetPixelViaPixelInfo(color_image,&pixel,q);
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(color_image);
+ }
+ if (SyncCacheViewAuthenticPixels(color_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_ColorMatrixImage)
+#endif
+ proceed=SetImageProgress(image,ColorMatrixImageTag,progress++,
+ image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ color_view=DestroyCacheView(color_view);
+ image_view=DestroyCacheView(image_view);
+ if (status == MagickFalse)
+ color_image=DestroyImage(color_image);
+ return(color_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
++ D e s t r o y F x I n f o %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% DestroyFxInfo() deallocates memory associated with an FxInfo structure.
+%
+% The format of the DestroyFxInfo method is:
+%
+% ImageInfo *DestroyFxInfo(ImageInfo *fx_info)
+%
+% A description of each parameter follows:
+%
+% o fx_info: the fx info.
+%
+*/
+MagickPrivate FxInfo *DestroyFxInfo(FxInfo *fx_info)
+{
+ register ssize_t
+ i;
+
+ fx_info->exception=DestroyExceptionInfo(fx_info->exception);
+ fx_info->expression=DestroyString(fx_info->expression);
+ fx_info->symbols=DestroySplayTree(fx_info->symbols);
+ fx_info->colors=DestroySplayTree(fx_info->colors);
+ for (i=(ssize_t) GetImageListLength(fx_info->images)-1; i >= 0; i--)
+ fx_info->view[i]=DestroyCacheView(fx_info->view[i]);
+ fx_info->view=(CacheView **) RelinquishMagickMemory(fx_info->view);
+ fx_info->random_info=DestroyRandomInfo(fx_info->random_info);
+ fx_info=(FxInfo *) RelinquishMagickMemory(fx_info);
+ return(fx_info);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
++ F x E v a l u a t e C h a n n e l E x p r e s s i o n %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FxEvaluateChannelExpression() evaluates an expression and returns the
+% results.
+%
+% The format of the FxEvaluateExpression method is:
+%
+% double FxEvaluateChannelExpression(FxInfo *fx_info,
+% const PixelChannel channel,const ssize_t x,const ssize_t y,
+% double *alpha,Exceptioninfo *exception)
+% double FxEvaluateExpression(FxInfo *fx_info,
+% double *alpha,Exceptioninfo *exception)
+%
+% A description of each parameter follows:
+%
+% o fx_info: the fx info.
+%
+% o channel: the channel.
+%
+% o x,y: the pixel position.
+%
+% o alpha: the result.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+
+static double FxChannelStatistics(FxInfo *fx_info,Image *image,
+ PixelChannel channel,const char *symbol,ExceptionInfo *exception)
+{
+ ChannelType
+ channel_mask;
+
+ char
+ key[MagickPathExtent],
+ statistic[MagickPathExtent];
+
+ const char
+ *value;
+
+ register const char
+ *p;
+
+ channel_mask=UndefinedChannel;
+ for (p=symbol; (*p != '.') && (*p != '\0'); p++) ;
+ if (*p == '.')
+ {
+ ssize_t
+ option;
+
+ option=ParseCommandOption(MagickPixelChannelOptions,MagickTrue,p+1);
+ if (option >= 0)
+ {
+ channel=(PixelChannel) option;
+ channel_mask=SetPixelChannelMask(image,(ChannelType)
+ (1UL << channel));
+ }
+ }
+ (void) FormatLocaleString(key,MagickPathExtent,"%p.%.20g.%s",(void *) image,
+ (double) channel,symbol);
+ value=(const char *) GetValueFromSplayTree(fx_info->symbols,key);
+ if (value != (const char *) NULL)
+ {
+ if (channel_mask != UndefinedChannel)
+ (void) SetPixelChannelMask(image,channel_mask);
+ return(QuantumScale*StringToDouble(value,(char **) NULL));
+ }
+ (void) DeleteNodeFromSplayTree(fx_info->symbols,key);
+ if (LocaleNCompare(symbol,"depth",5) == 0)
+ {
+ size_t
+ depth;
+
+ depth=GetImageDepth(image,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",(double)
+ depth);
+ }
+ if (LocaleNCompare(symbol,"kurtosis",8) == 0)
+ {
+ double
+ kurtosis,
+ skewness;
+
+ (void) GetImageKurtosis(image,&kurtosis,&skewness,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",kurtosis);
+ }
+ if (LocaleNCompare(symbol,"maxima",6) == 0)
+ {
+ double
+ maxima,
+ minima;
+
+ (void) GetImageRange(image,&minima,&maxima,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",maxima);
+ }
+ if (LocaleNCompare(symbol,"mean",4) == 0)
+ {
+ double
+ mean,
+ standard_deviation;
+
+ (void) GetImageMean(image,&mean,&standard_deviation,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",mean);
+ }
+ if (LocaleNCompare(symbol,"minima",6) == 0)
+ {
+ double
+ maxima,
+ minima;
+
+ (void) GetImageRange(image,&minima,&maxima,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",minima);
+ }
+ if (LocaleNCompare(symbol,"skewness",8) == 0)
+ {
+ double
+ kurtosis,
+ skewness;
+
+ (void) GetImageKurtosis(image,&kurtosis,&skewness,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",skewness);
+ }
+ if (LocaleNCompare(symbol,"standard_deviation",18) == 0)
+ {
+ double
+ mean,
+ standard_deviation;
+
+ (void) GetImageMean(image,&mean,&standard_deviation,exception);
+ (void) FormatLocaleString(statistic,MagickPathExtent,"%.20g",
+ standard_deviation);
+ }
+ if (channel_mask != UndefinedChannel)
+ (void) SetPixelChannelMask(image,channel_mask);
+ (void) AddValueToSplayTree(fx_info->symbols,ConstantString(key),
+ ConstantString(statistic));
+ return(QuantumScale*StringToDouble(statistic,(char **) NULL));
+}
+
+static double
+ FxEvaluateSubexpression(FxInfo *,const PixelChannel,const ssize_t,
+ const ssize_t,const char *,const size_t,double *,ExceptionInfo *);
+
+static MagickOffsetType FxGCD(MagickOffsetType alpha,MagickOffsetType beta)
+{
+ if (beta != 0)
+ return(FxGCD(beta,alpha % beta));
+ return(alpha);
+}
+
+static inline const char *FxSubexpression(const char *expression,
+ ExceptionInfo *exception)
+{
+ const char
+ *subexpression;
+
+ register ssize_t
+ level;
+
+ level=0;
+ subexpression=expression;
+ while ((*subexpression != '\0') &&
+ ((level != 1) || (strchr(")",(int) *subexpression) == (char *) NULL)))
+ {
+ if (strchr("(",(int) *subexpression) != (char *) NULL)
+ level++;
+ else
+ if (strchr(")",(int) *subexpression) != (char *) NULL)
+ level--;
+ subexpression++;
+ }
+ if (*subexpression == '\0')
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "UnbalancedParenthesis","`%s'",expression);
+ return(subexpression);
+}
+
+static double FxGetSymbol(FxInfo *fx_info,const PixelChannel channel,
+ const ssize_t x,const ssize_t y,const char *expression,const size_t depth,
+ ExceptionInfo *exception)
+{
+ char
+ *q,
+ symbol[MagickPathExtent];
+
+ const char
+ *p,
+ *value;
+
+ Image
+ *image;
+
+ MagickBooleanType
+ status;
+
+ PixelInfo
+ pixel;
+
+ double
+ alpha,
+ beta;
+
+ PointInfo
+ point;
+
+ register ssize_t
+ i;
+
+ size_t
+ level;
+
+ p=expression;
+ i=GetImageIndexInList(fx_info->images);
+ level=0;
+ point.x=(double) x;
+ point.y=(double) y;
+ if (isalpha((int) ((unsigned char) *(p+1))) == 0)
+ {
+ char
+ *subexpression;
+
+ subexpression=AcquireString(expression);
+ if (strchr("suv",(int) *p) != (char *) NULL)
+ {
+ switch (*p)
+ {
+ case 's':
+ default:
+ {
+ i=GetImageIndexInList(fx_info->images);
+ break;
+ }
+ case 'u': i=0; break;
+ case 'v': i=1; break;
+ }
+ p++;
+ if (*p == '[')
+ {
+ level++;
+ q=subexpression;
+ for (p++; *p != '\0'; )
+ {
+ if (*p == '[')
+ level++;
+ else
+ if (*p == ']')
+ {
+ level--;
+ if (level == 0)
+ break;
+ }
+ *q++=(*p++);
+ }
+ *q='\0';
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,subexpression,
+ depth,&beta,exception);
+ i=(ssize_t) alpha;
+ if (*p != '\0')
+ p++;
+ }
+ if (*p == '.')
+ p++;
+ }
+ if ((*p == 'p') && (isalpha((int) ((unsigned char) *(p+1))) == 0))
+ {
+ p++;
+ if (*p == '{')
+ {
+ level++;
+ q=subexpression;
+ for (p++; *p != '\0'; )
+ {
+ if (*p == '{')
+ level++;
+ else
+ if (*p == '}')
+ {
+ level--;
+ if (level == 0)
+ break;
+ }
+ *q++=(*p++);
+ }
+ *q='\0';
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,subexpression,
+ depth,&beta,exception);
+ point.x=alpha;
+ point.y=beta;
+ if (*p != '\0')
+ p++;
+ }
+ else
+ if (*p == '[')
+ {
+ level++;
+ q=subexpression;
+ for (p++; *p != '\0'; )
+ {
+ if (*p == '[')
+ level++;
+ else
+ if (*p == ']')
+ {
+ level--;
+ if (level == 0)
+ break;
+ }
+ *q++=(*p++);
+ }
+ *q='\0';
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,subexpression,
+ depth,&beta,exception);
+ point.x+=alpha;
+ point.y+=beta;
+ if (*p != '\0')
+ p++;
+ }
+ if (*p == '.')
+ p++;
+ }
+ subexpression=DestroyString(subexpression);
+ }
+ image=GetImageFromList(fx_info->images,i);
+ if (image == (Image *) NULL)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "NoSuchImage","`%s'",expression);
+ return(0.0);
+ }
+ i=GetImageIndexInList(image);
+ GetPixelInfo(image,&pixel);
+ status=InterpolatePixelInfo(image,fx_info->view[i],image->interpolate,
+ point.x,point.y,&pixel,exception);
+ (void) status;
+ if ((strlen(p) > 2) && (LocaleCompare(p,"intensity") != 0) &&
+ (LocaleCompare(p,"luma") != 0) && (LocaleCompare(p,"luminance") != 0) &&
+ (LocaleCompare(p,"hue") != 0) && (LocaleCompare(p,"saturation") != 0) &&
+ (LocaleCompare(p,"lightness") != 0))
+ {
+ char
+ name[MagickPathExtent];
+
+ (void) CopyMagickString(name,p,MagickPathExtent);
+ for (q=name+(strlen(name)-1); q > name; q--)
+ {
+ if (*q == ')')
+ break;
+ if (*q == '.')
+ {
+ *q='\0';
+ break;
+ }
+ }
+ if ((strlen(name) > 2) &&
+ (GetValueFromSplayTree(fx_info->symbols,name) == (const char *) NULL))
+ {
+ PixelInfo
+ *color;
+
+ color=(PixelInfo *) GetValueFromSplayTree(fx_info->colors,name);
+ if (color != (PixelInfo *) NULL)
+ {
+ pixel=(*color);
+ p+=strlen(name);
+ }
+ else
+ {
+ MagickBooleanType
+ status;
+
+ status=QueryColorCompliance(name,AllCompliance,&pixel,
+ fx_info->exception);
+ if (status != MagickFalse)
+ {
+ (void) AddValueToSplayTree(fx_info->colors,ConstantString(
+ name),ClonePixelInfo(&pixel));
+ p+=strlen(name);
+ }
+ }
+ }
+ }
+ (void) CopyMagickString(symbol,p,MagickPathExtent);
+ StripString(symbol);
+ if (*symbol == '\0')
+ {
+ switch (channel)
+ {
+ case RedPixelChannel: return(QuantumScale*pixel.red);
+ case GreenPixelChannel: return(QuantumScale*pixel.green);
+ case BluePixelChannel: return(QuantumScale*pixel.blue);
+ case BlackPixelChannel:
+ {
+ if (image->colorspace != CMYKColorspace)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ ImageError,"ColorSeparatedImageRequired","`%s'",
+ image->filename);
+ return(0.0);
+ }
+ return(QuantumScale*pixel.black);
+ }
+ case AlphaPixelChannel:
+ {
+ if (pixel.alpha_trait == UndefinedPixelTrait)
+ return(1.0);
+ alpha=(double) (QuantumScale*pixel.alpha);
+ return(alpha);
+ }
+ case IndexPixelChannel:
+ return(0.0);
+ case IntensityPixelChannel:
+ {
+ Quantum
+ quantum_pixel[MaxPixelChannels];
+
+ SetPixelViaPixelInfo(image,&pixel,quantum_pixel);
+ return(QuantumScale*GetPixelIntensity(image,quantum_pixel));
+ }
+ default:
+ break;
+ }
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "UnableToParseExpression","`%s'",p);
+ return(0.0);
+ }
+ switch (*symbol)
+ {
+ case 'A':
+ case 'a':
+ {
+ if (LocaleCompare(symbol,"a") == 0)
+ return((QuantumScale*pixel.alpha));
+ break;
+ }
+ case 'B':
+ case 'b':
+ {
+ if (LocaleCompare(symbol,"b") == 0)
+ return(QuantumScale*pixel.blue);
+ break;
+ }
+ case 'C':
+ case 'c':
+ {
+ if (LocaleNCompare(symbol,"channel",7) == 0)
+ {
+ GeometryInfo
+ channel_info;
+
+ MagickStatusType
+ flags;
+
+ flags=ParseGeometry(symbol+7,&channel_info);
+ if (image->colorspace == CMYKColorspace)
+ switch (channel)
+ {
+ case CyanPixelChannel:
+ {
+ if ((flags & RhoValue) == 0)
+ return(0.0);
+ return(channel_info.rho);
+ }
+ case MagentaPixelChannel:
+ {
+ if ((flags & SigmaValue) == 0)
+ return(0.0);
+ return(channel_info.sigma);
+ }
+ case YellowPixelChannel:
+ {
+ if ((flags & XiValue) == 0)
+ return(0.0);
+ return(channel_info.xi);
+ }
+ case BlackPixelChannel:
+ {
+ if ((flags & PsiValue) == 0)
+ return(0.0);
+ return(channel_info.psi);
+ }
+ case AlphaPixelChannel:
+ {
+ if ((flags & ChiValue) == 0)
+ return(0.0);
+ return(channel_info.chi);
+ }
+ default:
+ return(0.0);
+ }
+ switch (channel)
+ {
+ case RedPixelChannel:
+ {
+ if ((flags & RhoValue) == 0)
+ return(0.0);
+ return(channel_info.rho);
+ }
+ case GreenPixelChannel:
+ {
+ if ((flags & SigmaValue) == 0)
+ return(0.0);
+ return(channel_info.sigma);
+ }
+ case BluePixelChannel:
+ {
+ if ((flags & XiValue) == 0)
+ return(0.0);
+ return(channel_info.xi);
+ }
+ case BlackPixelChannel:
+ {
+ if ((flags & ChiValue) == 0)
+ return(0.0);
+ return(channel_info.chi);
+ }
+ case AlphaPixelChannel:
+ {
+ if ((flags & PsiValue) == 0)
+ return(0.0);
+ return(channel_info.psi);
+ }
+ default:
+ return(0.0);
+ }
+ }
+ if (LocaleCompare(symbol,"c") == 0)
+ return(QuantumScale*pixel.red);
+ break;
+ }
+ case 'D':
+ case 'd':
+ {
+ if (LocaleNCompare(symbol,"depth",5) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ break;
+ }
+ case 'E':
+ case 'e':
+ {
+ if (LocaleCompare(symbol,"extent") == 0)
+ {
+ if (image->extent != 0)
+ return(image->extent);
+ return(GetBlobSize(image));
+ }
+ break;
+ }
+ case 'G':
+ case 'g':
+ {
+ if (LocaleCompare(symbol,"g") == 0)
+ return(QuantumScale*pixel.green);
+ break;
+ }
+ case 'K':
+ case 'k':
+ {
+ if (LocaleNCompare(symbol,"kurtosis",8) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ if (LocaleCompare(symbol,"k") == 0)
+ {
+ if (image->colorspace != CMYKColorspace)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"ColorSeparatedImageRequired","`%s'",
+ image->filename);
+ return(0.0);
+ }
+ return(QuantumScale*pixel.black);
+ }
+ break;
+ }
+ case 'H':
+ case 'h':
+ {
+ if (LocaleCompare(symbol,"h") == 0)
+ return((double) image->rows);
+ if (LocaleCompare(symbol,"hue") == 0)
+ {
+ double
+ hue,
+ lightness,
+ saturation;
+
+ ConvertRGBToHSL(pixel.red,pixel.green,pixel.blue,&hue,&saturation,
+ &lightness);
+ return(hue);
+ }
+ break;
+ }
+ case 'I':
+ case 'i':
+ {
+ if ((LocaleCompare(symbol,"image.depth") == 0) ||
+ (LocaleCompare(symbol,"image.minima") == 0) ||
+ (LocaleCompare(symbol,"image.maxima") == 0) ||
+ (LocaleCompare(symbol,"image.mean") == 0) ||
+ (LocaleCompare(symbol,"image.kurtosis") == 0) ||
+ (LocaleCompare(symbol,"image.skewness") == 0) ||
+ (LocaleCompare(symbol,"image.standard_deviation") == 0))
+ return(FxChannelStatistics(fx_info,image,channel,symbol+6,exception));
+ if (LocaleCompare(symbol,"image.resolution.x") == 0)
+ return(image->resolution.x);
+ if (LocaleCompare(symbol,"image.resolution.y") == 0)
+ return(image->resolution.y);
+ if (LocaleCompare(symbol,"intensity") == 0)
+ {
+ Quantum
+ quantum_pixel[MaxPixelChannels];
+
+ SetPixelViaPixelInfo(image,&pixel,quantum_pixel);
+ return(QuantumScale*GetPixelIntensity(image,quantum_pixel));
+ }
+ if (LocaleCompare(symbol,"i") == 0)
+ return((double) x);
+ break;
+ }
+ case 'J':
+ case 'j':
+ {
+ if (LocaleCompare(symbol,"j") == 0)
+ return((double) y);
+ break;
+ }
+ case 'L':
+ case 'l':
+ {
+ if (LocaleCompare(symbol,"lightness") == 0)
+ {
+ double
+ hue,
+ lightness,
+ saturation;
+
+ ConvertRGBToHSL(pixel.red,pixel.green,pixel.blue,&hue,&saturation,
+ &lightness);
+ return(lightness);
+ }
+ if (LocaleCompare(symbol,"luma") == 0)
+ {
+ double
+ luma;
+
+ luma=0.212656*pixel.red+0.715158*pixel.green+0.072186*pixel.blue;
+ return(QuantumScale*luma);
+ }
+ if (LocaleCompare(symbol,"luminance") == 0)
+ {
+ double
+ luminence;
+
+ luminence=0.212656*pixel.red+0.715158*pixel.green+0.072186*pixel.blue;
+ return(QuantumScale*luminence);
+ }
+ break;
+ }
+ case 'M':
+ case 'm':
+ {
+ if (LocaleNCompare(symbol,"maxima",6) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ if (LocaleNCompare(symbol,"mean",4) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ if (LocaleNCompare(symbol,"minima",6) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ if (LocaleCompare(symbol,"m") == 0)
+ return(QuantumScale*pixel.green);
+ break;
+ }
+ case 'N':
+ case 'n':
+ {
+ if (LocaleCompare(symbol,"n") == 0)
+ return((double) GetImageListLength(fx_info->images));
+ break;
+ }
+ case 'O':
+ case 'o':
+ {
+ if (LocaleCompare(symbol,"o") == 0)
+ return(QuantumScale*pixel.alpha);
+ break;
+ }
+ case 'P':
+ case 'p':
+ {
+ if (LocaleCompare(symbol,"page.height") == 0)
+ return((double) image->page.height);
+ if (LocaleCompare(symbol,"page.width") == 0)
+ return((double) image->page.width);
+ if (LocaleCompare(symbol,"page.x") == 0)
+ return((double) image->page.x);
+ if (LocaleCompare(symbol,"page.y") == 0)
+ return((double) image->page.y);
+ break;
+ }
+ case 'Q':
+ case 'q':
+ {
+ if (LocaleCompare(symbol,"quality") == 0)
+ return((double) image->quality);
+ break;
+ }
+ case 'R':
+ case 'r':
+ {
+ if (LocaleCompare(symbol,"resolution.x") == 0)
+ return(image->resolution.x);
+ if (LocaleCompare(symbol,"resolution.y") == 0)
+ return(image->resolution.y);
+ if (LocaleCompare(symbol,"r") == 0)
+ return(QuantumScale*pixel.red);
+ break;
+ }
+ case 'S':
+ case 's':
+ {
+ if (LocaleCompare(symbol,"saturation") == 0)
+ {
+ double
+ hue,
+ lightness,
+ saturation;
+
+ ConvertRGBToHSL(pixel.red,pixel.green,pixel.blue,&hue,&saturation,
+ &lightness);
+ return(saturation);
+ }
+ if (LocaleNCompare(symbol,"skewness",8) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ if (LocaleNCompare(symbol,"standard_deviation",18) == 0)
+ return(FxChannelStatistics(fx_info,image,channel,symbol,exception));
+ break;
+ }
+ case 'T':
+ case 't':
+ {
+ if (LocaleCompare(symbol,"t") == 0)
+ return((double) GetImageIndexInList(fx_info->images));
+ break;
+ }
+ case 'W':
+ case 'w':
+ {
+ if (LocaleCompare(symbol,"w") == 0)
+ return((double) image->columns);
+ break;
+ }
+ case 'Y':
+ case 'y':
+ {
+ if (LocaleCompare(symbol,"y") == 0)
+ return(QuantumScale*pixel.blue);
+ break;
+ }
+ case 'Z':
+ case 'z':
+ {
+ if (LocaleCompare(symbol,"z") == 0)
+ return((double) GetImageDepth(image,fx_info->exception));
+ break;
+ }
+ default:
+ break;
+ }
+ value=(const char *) GetValueFromSplayTree(fx_info->symbols,symbol);
+ if (value != (const char *) NULL)
+ return(StringToDouble(value,(char **) NULL));
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "UnableToParseExpression","`%s'",symbol);
+ return(0.0);
+}
+
+static const char *FxOperatorPrecedence(const char *expression,
+ ExceptionInfo *exception)
+{
+ typedef enum
+ {
+ UndefinedPrecedence,
+ NullPrecedence,
+ BitwiseComplementPrecedence,
+ ExponentPrecedence,
+ ExponentialNotationPrecedence,
+ MultiplyPrecedence,
+ AdditionPrecedence,
+ ShiftPrecedence,
+ RelationalPrecedence,
+ EquivalencyPrecedence,
+ BitwiseAndPrecedence,
+ BitwiseOrPrecedence,
+ LogicalAndPrecedence,
+ LogicalOrPrecedence,
+ TernaryPrecedence,
+ AssignmentPrecedence,
+ CommaPrecedence,
+ SeparatorPrecedence
+ } FxPrecedence;
+
+ FxPrecedence
+ precedence,
+ target;
+
+ register const char
+ *subexpression;
+
+ register int
+ c;
+
+ size_t
+ level;
+
+ c=(-1);
+ level=0;
+ subexpression=(const char *) NULL;
+ target=NullPrecedence;
+ while ((c != '\0') && (*expression != '\0'))
+ {
+ precedence=UndefinedPrecedence;
+ if ((isspace((int) ((unsigned char) *expression)) != 0) || (c == (int) '@'))
+ {
+ expression++;
+ continue;
+ }
+ switch (*expression)
+ {
+ case 'A':
+ case 'a':
+ {
+#if defined(MAGICKCORE_HAVE_ACOSH)
+ if (LocaleNCompare(expression,"acosh",5) == 0)
+ {
+ expression+=5;
+ break;
+ }
+#endif
+#if defined(MAGICKCORE_HAVE_ASINH)
+ if (LocaleNCompare(expression,"asinh",5) == 0)
+ {
+ expression+=5;
+ break;
+ }
+#endif
+#if defined(MAGICKCORE_HAVE_ATANH)
+ if (LocaleNCompare(expression,"atanh",5) == 0)
+ {
+ expression+=5;
+ break;
+ }
+#endif
+ if (LocaleNCompare(expression,"atan2",5) == 0)
+ {
+ expression+=5;
+ break;
+ }
+ break;
+ }
+ case 'E':
+ case 'e':
+ {
+ if ((isdigit(c) != 0) &&
+ ((LocaleNCompare(expression,"E+",2) == 0) ||
+ (LocaleNCompare(expression,"E-",2) == 0)))
+ {
+ expression+=2; /* scientific notation */
+ break;
+ }
+ }
+ case 'J':
+ case 'j':
+ {
+ if ((LocaleNCompare(expression,"j0",2) == 0) ||
+ (LocaleNCompare(expression,"j1",2) == 0))
+ {
+ expression+=2;
+ break;
+ }
+ break;
+ }
+ case '#':
+ {
+ while (isxdigit((int) ((unsigned char) *(expression+1))) != 0)
+ expression++;
+ break;
+ }
+ default:
+ break;
+ }
+ if ((c == (int) '{') || (c == (int) '['))
+ level++;
+ else
+ if ((c == (int) '}') || (c == (int) ']'))
+ level--;
+ if (level == 0)
+ switch ((unsigned char) *expression)
+ {
+ case '~':
+ case '!':
+ {
+ precedence=BitwiseComplementPrecedence;
+ break;
+ }
+ case '^':
+ case '@':
+ {
+ precedence=ExponentPrecedence;
+ break;
+ }
+ default:
+ {
+ if (((c != 0) && ((isdigit(c) != 0) ||
+ (strchr(")",c) != (char *) NULL))) &&
+ (((islower((int) ((unsigned char) *expression)) != 0) ||
+ (strchr("(",(int) ((unsigned char) *expression)) != (char *) NULL)) ||
+ ((isdigit(c) == 0) &&
+ (isdigit((int) ((unsigned char) *expression)) != 0))) &&
+ (strchr("xy",(int) ((unsigned char) *expression)) == (char *) NULL))
+ precedence=MultiplyPrecedence;
+ break;
+ }
+ case '*':
+ case '/':
+ case '%':
+ {
+ precedence=MultiplyPrecedence;
+ break;
+ }
+ case '+':
+ case '-':
+ {
+ if ((strchr("(+-/*%:&^|<>~,",c) == (char *) NULL) ||
+ (isalpha(c) != 0))
+ precedence=AdditionPrecedence;
+ break;
+ }
+ case LeftShiftOperator:
+ case RightShiftOperator:
+ {
+ precedence=ShiftPrecedence;
+ break;
+ }
+ case '<':
+ case LessThanEqualOperator:
+ case GreaterThanEqualOperator:
+ case '>':
+ {
+ precedence=RelationalPrecedence;
+ break;
+ }
+ case EqualOperator:
+ case NotEqualOperator:
+ {
+ precedence=EquivalencyPrecedence;
+ break;
+ }
+ case '&':
+ {
+ precedence=BitwiseAndPrecedence;
+ break;
+ }
+ case '|':
+ {
+ precedence=BitwiseOrPrecedence;
+ break;
+ }
+ case LogicalAndOperator:
+ {
+ precedence=LogicalAndPrecedence;
+ break;
+ }
+ case LogicalOrOperator:
+ {
+ precedence=LogicalOrPrecedence;
+ break;
+ }
+ case ExponentialNotation:
+ {
+ precedence=ExponentialNotationPrecedence;
+ break;
+ }
+ case ':':
+ case '?':
+ {
+ precedence=TernaryPrecedence;
+ break;
+ }
+ case '=':
+ {
+ precedence=AssignmentPrecedence;
+ break;
+ }
+ case ',':
+ {
+ precedence=CommaPrecedence;
+ break;
+ }
+ case ';':
+ {
+ precedence=SeparatorPrecedence;
+ break;
+ }
+ }
+ if ((precedence == BitwiseComplementPrecedence) ||
+ (precedence == TernaryPrecedence) ||
+ (precedence == AssignmentPrecedence))
+ {
+ if (precedence > target)
+ {
+ /*
+ Right-to-left associativity.
+ */
+ target=precedence;
+ subexpression=expression;
+ }
+ }
+ else
+ if (precedence >= target)
+ {
+ /*
+ Left-to-right associativity.
+ */
+ target=precedence;
+ subexpression=expression;
+ }
+ if (strchr("(",(int) *expression) != (char *) NULL)
+ expression=FxSubexpression(expression,exception);
+ c=(int) (*expression++);
+ }
+ return(subexpression);
+}
+
+static double FxEvaluateSubexpression(FxInfo *fx_info,
+ const PixelChannel channel,const ssize_t x,const ssize_t y,
+ const char *expression,const size_t depth,double *beta,
+ ExceptionInfo *exception)
+{
+#define FxMaxParenthesisDepth 58
+#define FxMaxSubexpressionDepth 200
+#define FxReturn(value) \
+{ \
+ subexpression=DestroyString(subexpression); \
+ return(value); \
+}
+
+ char
+ *q,
+ *subexpression;
+
+ double
+ alpha,
+ gamma;
+
+ register const char
+ *p;
+
+ *beta=0.0;
+ subexpression=AcquireString(expression);
+ *subexpression='\0';
+ if (depth > FxMaxSubexpressionDepth)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "UnableToParseExpression","`%s'",expression);
+ FxReturn(0.0);
+ }
+ if (exception->severity >= ErrorException)
+ FxReturn(0.0);
+ while (isspace((int) ((unsigned char) *expression)) != 0)
+ expression++;
+ if (*expression == '\0')
+ FxReturn(0.0);
+ p=FxOperatorPrecedence(expression,exception);
+ if (p != (const char *) NULL)
+ {
+ (void) CopyMagickString(subexpression,expression,(size_t)
+ (p-expression+1));
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,subexpression,depth+1,
+ beta,exception);
+ switch ((unsigned char) *p)
+ {
+ case '~':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ *beta=(double) (~(size_t) *beta);
+ FxReturn(*beta);
+ }
+ case '!':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(*beta == 0.0 ? 1.0 : 0.0);
+ }
+ case '^':
+ {
+ *beta=pow(alpha,FxEvaluateSubexpression(fx_info,channel,x,y,++p,
+ depth+1,beta,exception));
+ FxReturn(*beta);
+ }
+ case '*':
+ case ExponentialNotation:
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha*(*beta));
+ }
+ case '/':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ if (*beta == 0.0)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"DivideByZero","`%s'",expression);
+ FxReturn(0.0);
+ }
+ FxReturn(alpha/(*beta));
+ }
+ case '%':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ *beta=fabs(floor((*beta)+0.5));
+ if (*beta == 0.0)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"DivideByZero","`%s'",expression);
+ FxReturn(0.0);
+ }
+ FxReturn(fmod(alpha,*beta));
+ }
+ case '+':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha+(*beta));
+ }
+ case '-':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha-(*beta));
+ }
+ case LeftShiftOperator:
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ if ((size_t) (gamma+0.5) >= (8*sizeof(size_t)))
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"ShiftCountOverflow","`%s'",subexpression);
+ FxReturn(0.0);
+ }
+ *beta=(double) ((size_t) (alpha+0.5) << (size_t) (gamma+0.5));
+ FxReturn(*beta);
+ }
+ case RightShiftOperator:
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ if ((size_t) (gamma+0.5) >= (8*sizeof(size_t)))
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"ShiftCountOverflow","`%s'",subexpression);
+ FxReturn(0.0);
+ }
+ *beta=(double) ((size_t) (alpha+0.5) >> (size_t) (gamma+0.5));
+ FxReturn(*beta);
+ }
+ case '<':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha < *beta ? 1.0 : 0.0);
+ }
+ case LessThanEqualOperator:
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha <= *beta ? 1.0 : 0.0);
+ }
+ case '>':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha > *beta ? 1.0 : 0.0);
+ }
+ case GreaterThanEqualOperator:
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha >= *beta ? 1.0 : 0.0);
+ }
+ case EqualOperator:
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(fabs(alpha-(*beta)) < MagickEpsilon ? 1.0 : 0.0);
+ }
+ case NotEqualOperator:
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(fabs(alpha-(*beta)) >= MagickEpsilon ? 1.0 : 0.0);
+ }
+ case '&':
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ *beta=(double) ((size_t) (alpha+0.5) & (size_t) (gamma+0.5));
+ FxReturn(*beta);
+ }
+ case '|':
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ *beta=(double) ((size_t) (alpha+0.5) | (size_t) (gamma+0.5));
+ FxReturn(*beta);
+ }
+ case LogicalAndOperator:
+ {
+ p++;
+ if (alpha <= 0.0)
+ {
+ *beta=0.0;
+ FxReturn(*beta);
+ }
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,p,depth+1,beta,
+ exception);
+ *beta=(gamma > 0.0) ? 1.0 : 0.0;
+ FxReturn(*beta);
+ }
+ case LogicalOrOperator:
+ {
+ p++;
+ if (alpha > 0.0)
+ {
+ *beta=1.0;
+ FxReturn(*beta);
+ }
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,p,depth+1,beta,
+ exception);
+ *beta=(gamma > 0.0) ? 1.0 : 0.0;
+ FxReturn(*beta);
+ }
+ case '?':
+ {
+ (void) CopyMagickString(subexpression,++p,MagickPathExtent);
+ q=subexpression;
+ p=StringToken(":",&q);
+ if (q == (char *) NULL)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"UnableToParseExpression","`%s'",subexpression);
+ FxReturn(0.0);
+ }
+ if (fabs(alpha) >= MagickEpsilon)
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,p,depth+1,beta,
+ exception);
+ else
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,q,depth+1,beta,
+ exception);
+ FxReturn(gamma);
+ }
+ case '=':
+ {
+ char
+ numeric[MagickPathExtent];
+
+ q=subexpression;
+ while (isalpha((int) ((unsigned char) *q)) != 0)
+ q++;
+ if (*q != '\0')
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ OptionError,"UnableToParseExpression","`%s'",subexpression);
+ FxReturn(0.0);
+ }
+ ClearMagickException(exception);
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ (void) FormatLocaleString(numeric,MagickPathExtent,"%.20g",*beta);
+ (void) DeleteNodeFromSplayTree(fx_info->symbols,subexpression);
+ (void) AddValueToSplayTree(fx_info->symbols,ConstantString(
+ subexpression),ConstantString(numeric));
+ FxReturn(*beta);
+ }
+ case ',':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(alpha);
+ }
+ case ';':
+ {
+ *beta=FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,beta,
+ exception);
+ FxReturn(*beta);
+ }
+ default:
+ {
+ gamma=alpha*FxEvaluateSubexpression(fx_info,channel,x,y,++p,depth+1,
+ beta,exception);
+ FxReturn(gamma);
+ }
+ }
+ }
+ if (strchr("(",(int) *expression) != (char *) NULL)
+ {
+ if (depth >= FxMaxParenthesisDepth)
+ (void) ThrowMagickException(exception,GetMagickModule(),OptionError,
+ "ParenthesisNestedTooDeeply","`%s'",expression);
+ (void) CopyMagickString(subexpression,expression+1,MagickPathExtent);
+ if (strlen(subexpression) != 0)
+ subexpression[strlen(subexpression)-1]='\0';
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,subexpression,depth+1,
+ beta,exception);
+ FxReturn(gamma);
+ }
+ switch (*expression)
+ {
+ case '+':
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,expression+1,depth+1,
+ beta,exception);
+ FxReturn(1.0*gamma);
+ }
+ case '-':
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,expression+1,depth+1,
+ beta,exception);
+ FxReturn(-1.0*gamma);
+ }
+ case '~':
+ {
+ gamma=FxEvaluateSubexpression(fx_info,channel,x,y,expression+1,depth+1,
+ beta,exception);
+ FxReturn((double) (~(size_t) (gamma+0.5)));
+ }
+ case 'A':
+ case 'a':
+ {
+ if (LocaleNCompare(expression,"abs",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(fabs(alpha));
+ }
+#if defined(MAGICKCORE_HAVE_ACOSH)
+ if (LocaleNCompare(expression,"acosh",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(acosh(alpha));
+ }
+#endif
+ if (LocaleNCompare(expression,"acos",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(acos(alpha));
+ }
+#if defined(MAGICKCORE_HAVE_J1)
+ if (LocaleNCompare(expression,"airy",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ if (alpha == 0.0)
+ FxReturn(1.0);
+ gamma=2.0*j1((MagickPI*alpha))/(MagickPI*alpha);
+ FxReturn(gamma*gamma);
+ }
+#endif
+#if defined(MAGICKCORE_HAVE_ASINH)
+ if (LocaleNCompare(expression,"asinh",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(asinh(alpha));
+ }
+#endif
+ if (LocaleNCompare(expression,"asin",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(asin(alpha));
+ }
+ if (LocaleNCompare(expression,"alt",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(((ssize_t) alpha) & 0x01 ? -1.0 : 1.0);
+ }
+ if (LocaleNCompare(expression,"atan2",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(atan2(alpha,*beta));
+ }
+#if defined(MAGICKCORE_HAVE_ATANH)
+ if (LocaleNCompare(expression,"atanh",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(atanh(alpha));
+ }
+#endif
+ if (LocaleNCompare(expression,"atan",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(atan(alpha));
+ }
+ if (LocaleCompare(expression,"a") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'B':
+ case 'b':
+ {
+ if (LocaleCompare(expression,"b") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'C':
+ case 'c':
+ {
+ if (LocaleNCompare(expression,"ceil",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(ceil(alpha));
+ }
+ if (LocaleNCompare(expression,"clamp",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ if (alpha < 0.0)
+ FxReturn(0.0);
+ if (alpha > 1.0)
+ FxReturn(1.0);
+ FxReturn(alpha);
+ }
+ if (LocaleNCompare(expression,"cosh",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(cosh(alpha));
+ }
+ if (LocaleNCompare(expression,"cos",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(cos(alpha));
+ }
+ if (LocaleCompare(expression,"c") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'D':
+ case 'd':
+ {
+ if (LocaleNCompare(expression,"debug",5) == 0)
+ {
+ const char
+ *type;
+
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ if (fx_info->images->colorspace == CMYKColorspace)
+ switch (channel)
+ {
+ case CyanPixelChannel: type="cyan"; break;
+ case MagentaPixelChannel: type="magenta"; break;
+ case YellowPixelChannel: type="yellow"; break;
+ case AlphaPixelChannel: type="opacity"; break;
+ case BlackPixelChannel: type="black"; break;
+ default: type="unknown"; break;
+ }
+ else
+ switch (channel)
+ {
+ case RedPixelChannel: type="red"; break;
+ case GreenPixelChannel: type="green"; break;
+ case BluePixelChannel: type="blue"; break;
+ case AlphaPixelChannel: type="opacity"; break;
+ default: type="unknown"; break;
+ }
+ *subexpression='\0';
+ if (strlen(expression) > 6)
+ (void) CopyMagickString(subexpression,expression+6,
+ MagickPathExtent);
+ if (strlen(subexpression) > 1)
+ subexpression[strlen(subexpression)-1]='\0';
+ if (fx_info->file != (FILE *) NULL)
+ (void) FormatLocaleFile(fx_info->file,"%s[%.20g,%.20g].%s: "
+ "%s=%.*g\n",fx_info->images->filename,(double) x,(double) y,type,
+ subexpression,GetMagickPrecision(),alpha);
+ FxReturn(0.0);
+ }
+ if (LocaleNCompare(expression,"drc",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn((alpha/(*beta*(alpha-1.0)+1.0)));
+ }
+ break;
+ }
+ case 'E':
+ case 'e':
+ {
+ if (LocaleCompare(expression,"epsilon") == 0)
+ FxReturn(MagickEpsilon);
+#if defined(MAGICKCORE_HAVE_ERF)
+ if (LocaleNCompare(expression,"erf",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(erf(alpha));
+ }
+#endif
+ if (LocaleNCompare(expression,"exp",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(exp(alpha));
+ }
+ if (LocaleCompare(expression,"e") == 0)
+ FxReturn(2.7182818284590452354);
+ break;
+ }
+ case 'F':
+ case 'f':
+ {
+ if (LocaleNCompare(expression,"floor",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(floor(alpha));
+ }
+ break;
+ }
+ case 'G':
+ case 'g':
+ {
+ if (LocaleNCompare(expression,"gauss",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ gamma=exp((-alpha*alpha/2.0))/sqrt(2.0*MagickPI);
+ FxReturn(gamma);
+ }
+ if (LocaleNCompare(expression,"gcd",3) == 0)
+ {
+ MagickOffsetType
+ gcd;
+
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ gcd=FxGCD((MagickOffsetType) (alpha+0.5),(MagickOffsetType) (*beta+
+ 0.5));
+ FxReturn((double) gcd);
+ }
+ if (LocaleCompare(expression,"g") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'H':
+ case 'h':
+ {
+ if (LocaleCompare(expression,"h") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ if (LocaleCompare(expression,"hue") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ if (LocaleNCompare(expression,"hypot",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(hypot(alpha,*beta));
+ }
+ break;
+ }
+ case 'K':
+ case 'k':
+ {
+ if (LocaleCompare(expression,"k") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'I':
+ case 'i':
+ {
+ if (LocaleCompare(expression,"intensity") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ if (LocaleNCompare(expression,"int",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(floor(alpha));
+ }
+ if (LocaleNCompare(expression,"isnan",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn((double) !!IsNaN(alpha));
+ }
+ if (LocaleCompare(expression,"i") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'J':
+ case 'j':
+ {
+ if (LocaleCompare(expression,"j") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+#if defined(MAGICKCORE_HAVE_J0)
+ if (LocaleNCompare(expression,"j0",2) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+2,
+ depth+1,beta,exception);
+ FxReturn(j0(alpha));
+ }
+#endif
+#if defined(MAGICKCORE_HAVE_J1)
+ if (LocaleNCompare(expression,"j1",2) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+2,
+ depth+1,beta,exception);
+ FxReturn(j1(alpha));
+ }
+#endif
+#if defined(MAGICKCORE_HAVE_J1)
+ if (LocaleNCompare(expression,"jinc",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ if (alpha == 0.0)
+ FxReturn(1.0);
+ gamma=(2.0*j1((MagickPI*alpha))/(MagickPI*alpha));
+ FxReturn(gamma);
+ }
+#endif
+ break;
+ }
+ case 'L':
+ case 'l':
+ {
+ if (LocaleNCompare(expression,"ln",2) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+2,
+ depth+1,beta,exception);
+ FxReturn(log(alpha));
+ }
+ if (LocaleNCompare(expression,"logtwo",6) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+6,
+ depth+1,beta,exception);
+ FxReturn(log10(alpha)/log10(2.0));
+ }
+ if (LocaleNCompare(expression,"log",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(log10(alpha));
+ }
+ if (LocaleCompare(expression,"lightness") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'M':
+ case 'm':
+ {
+ if (LocaleCompare(expression,"MaxRGB") == 0)
+ FxReturn(QuantumRange);
+ if (LocaleNCompare(expression,"maxima",6) == 0)
+ break;
+ if (LocaleNCompare(expression,"max",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(alpha > *beta ? alpha : *beta);
+ }
+ if (LocaleNCompare(expression,"minima",6) == 0)
+ break;
+ if (LocaleNCompare(expression,"min",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(alpha < *beta ? alpha : *beta);
+ }
+ if (LocaleNCompare(expression,"mod",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ gamma=alpha-floor((alpha*PerceptibleReciprocal(*beta)))*(*beta);
+ FxReturn(gamma);
+ }
+ if (LocaleCompare(expression,"m") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'N':
+ case 'n':
+ {
+ if (LocaleNCompare(expression,"not",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn((double) (alpha < MagickEpsilon));
+ }
+ if (LocaleCompare(expression,"n") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'O':
+ case 'o':
+ {
+ if (LocaleCompare(expression,"Opaque") == 0)
+ FxReturn(1.0);
+ if (LocaleCompare(expression,"o") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'P':
+ case 'p':
+ {
+ if (LocaleCompare(expression,"phi") == 0)
+ FxReturn(MagickPHI);
+ if (LocaleCompare(expression,"pi") == 0)
+ FxReturn(MagickPI);
+ if (LocaleNCompare(expression,"pow",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(pow(alpha,*beta));
+ }
+ if (LocaleCompare(expression,"p") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'Q':
+ case 'q':
+ {
+ if (LocaleCompare(expression,"QuantumRange") == 0)
+ FxReturn(QuantumRange);
+ if (LocaleCompare(expression,"QuantumScale") == 0)
+ FxReturn(QuantumScale);
+ break;
+ }
+ case 'R':
+ case 'r':
+ {
+ if (LocaleNCompare(expression,"rand",4) == 0)
+ {
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_FxEvaluateSubexpression)
+#endif
+ alpha=GetPseudoRandomValue(fx_info->random_info);
+ FxReturn(alpha);
+ }
+ if (LocaleNCompare(expression,"round",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ FxReturn(floor(alpha+0.5));
+ }
+ if (LocaleCompare(expression,"r") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'S':
+ case 's':
+ {
+ if (LocaleCompare(expression,"saturation") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ if (LocaleNCompare(expression,"sign",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(alpha < 0.0 ? -1.0 : 1.0);
+ }
+ if (LocaleNCompare(expression,"sinc",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ if (alpha == 0)
+ FxReturn(1.0);
+ gamma=sin((MagickPI*alpha))/(MagickPI*alpha);
+ FxReturn(gamma);
+ }
+ if (LocaleNCompare(expression,"sinh",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(sinh(alpha));
+ }
+ if (LocaleNCompare(expression,"sin",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(sin(alpha));
+ }
+ if (LocaleNCompare(expression,"sqrt",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(sqrt(alpha));
+ }
+ if (LocaleNCompare(expression,"squish",6) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+6,
+ depth+1,beta,exception);
+ FxReturn((1.0/(1.0+exp(-alpha))));
+ }
+ if (LocaleCompare(expression,"s") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'T':
+ case 't':
+ {
+ if (LocaleNCompare(expression,"tanh",4) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+4,
+ depth+1,beta,exception);
+ FxReturn(tanh(alpha));
+ }
+ if (LocaleNCompare(expression,"tan",3) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+3,
+ depth+1,beta,exception);
+ FxReturn(tan(alpha));
+ }
+ if (LocaleCompare(expression,"Transparent") == 0)
+ FxReturn(0.0);
+ if (LocaleNCompare(expression,"trunc",5) == 0)
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ if (alpha >= 0.0)
+ FxReturn(floor(alpha));
+ FxReturn(ceil(alpha));
+ }
+ if (LocaleCompare(expression,"t") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'U':
+ case 'u':
+ {
+ if (LocaleCompare(expression,"u") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'V':
+ case 'v':
+ {
+ if (LocaleCompare(expression,"v") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'W':
+ case 'w':
+ {
+ if (LocaleNCompare(expression,"while",5) == 0)
+ {
+ do
+ {
+ alpha=FxEvaluateSubexpression(fx_info,channel,x,y,expression+5,
+ depth+1,beta,exception);
+ } while (fabs(alpha) >= MagickEpsilon);
+ FxReturn(*beta);
+ }
+ if (LocaleCompare(expression,"w") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'Y':
+ case 'y':
+ {
+ if (LocaleCompare(expression,"y") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ case 'Z':
+ case 'z':
+ {
+ if (LocaleCompare(expression,"z") == 0)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ break;
+ }
+ default:
+ break;
+ }
+ subexpression=DestroyString(subexpression);
+ q=(char *) expression;
+ alpha=InterpretSiPrefixValue(expression,&q);
+ if (q == expression)
+ FxReturn(FxGetSymbol(fx_info,channel,x,y,expression,depth+1,exception));
+ FxReturn(alpha);
+}
+
+MagickPrivate MagickBooleanType FxEvaluateExpression(FxInfo *fx_info,
+ double *alpha,ExceptionInfo *exception)
+{
+ MagickBooleanType
+ status;
+
+ status=FxEvaluateChannelExpression(fx_info,GrayPixelChannel,0,0,alpha,
+ exception);
+ return(status);
+}
+
+MagickExport MagickBooleanType FxPreprocessExpression(FxInfo *fx_info,
+ double *alpha,ExceptionInfo *exception)
+{
+ FILE
+ *file;
+
+ MagickBooleanType
+ status;
+
+ file=fx_info->file;
+ fx_info->file=(FILE *) NULL;
+ status=FxEvaluateChannelExpression(fx_info,GrayPixelChannel,0,0,alpha,
+ exception);
+ fx_info->file=file;
+ return(status);
+}
+
+MagickPrivate MagickBooleanType FxEvaluateChannelExpression(FxInfo *fx_info,
+ const PixelChannel channel,const ssize_t x,const ssize_t y,
+ double *alpha,ExceptionInfo *exception)
+{
+ double
+ beta;
+
+ beta=0.0;
+ *alpha=FxEvaluateSubexpression(fx_info,channel,x,y,fx_info->expression,0,
+ &beta,exception);
+ return(exception->severity == OptionError ? MagickFalse : MagickTrue);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% F x I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% FxImage() applies a mathematical expression to the specified image.
+%
+% The format of the FxImage method is:
+%
+% Image *FxImage(const Image *image,const char *expression,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o expression: A mathematical expression.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+
+static FxInfo **DestroyFxThreadSet(FxInfo **fx_info)
+{
+ register ssize_t
+ i;
+
+ assert(fx_info != (FxInfo **) NULL);
+ for (i=0; i < (ssize_t) GetMagickResourceLimit(ThreadResource); i++)
+ if (fx_info[i] != (FxInfo *) NULL)
+ fx_info[i]=DestroyFxInfo(fx_info[i]);
+ fx_info=(FxInfo **) RelinquishMagickMemory(fx_info);
+ return(fx_info);
+}
+
+static FxInfo **AcquireFxThreadSet(const Image *image,const char *expression,
+ ExceptionInfo *exception)
+{
+ char
+ *fx_expression;
+
+ FxInfo
+ **fx_info;
+
+ double
+ alpha;
+
+ register ssize_t
+ i;
+
+ size_t
+ number_threads;
+
+ number_threads=(size_t) GetMagickResourceLimit(ThreadResource);
+ fx_info=(FxInfo **) AcquireQuantumMemory(number_threads,sizeof(*fx_info));
+ if (fx_info == (FxInfo **) NULL)
+ {
+ (void) ThrowMagickException(exception,GetMagickModule(),
+ ResourceLimitError,"MemoryAllocationFailed","`%s'",image->filename);
+ return((FxInfo **) NULL);
+ }
+ (void) memset(fx_info,0,number_threads*sizeof(*fx_info));
+ if (*expression != '@')
+ fx_expression=ConstantString(expression);
+ else
+ fx_expression=FileToString(expression+1,~0UL,exception);
+ for (i=0; i < (ssize_t) number_threads; i++)
+ {
+ MagickBooleanType
+ status;
+
+ fx_info[i]=AcquireFxInfo(image,fx_expression,exception);
+ if (fx_info[i] == (FxInfo *) NULL)
+ break;
+ status=FxPreprocessExpression(fx_info[i],&alpha,exception);
+ if (status == MagickFalse)
+ break;
+ }
+ fx_expression=DestroyString(fx_expression);
+ if (i < (ssize_t) number_threads)
+ fx_info=DestroyFxThreadSet(fx_info);
+ return(fx_info);
+}
+
+MagickExport Image *FxImage(const Image *image,const char *expression,
+ ExceptionInfo *exception)
+{
+#define FxImageTag "Fx/Image"
+
+ CacheView
+ *fx_view,
+ *image_view;
+
+ FxInfo
+ **magick_restrict fx_info;
+
+ Image
+ *fx_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ ssize_t
+ y;
+
+ assert(image != (Image *) NULL);
+ assert(image->signature == MagickCoreSignature);
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+ fx_info=AcquireFxThreadSet(image,expression,exception);
+ if (fx_info == (FxInfo **) NULL)
+ return((Image *) NULL);
+ fx_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (fx_image == (Image *) NULL)
+ {
+ fx_info=DestroyFxThreadSet(fx_info);
+ return((Image *) NULL);
+ }
+ if (SetImageStorageClass(fx_image,DirectClass,exception) == MagickFalse)
+ {
+ fx_info=DestroyFxThreadSet(fx_info);
+ fx_image=DestroyImage(fx_image);
+ return((Image *) NULL);
+ }
+ /*
+ Fx image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(image,exception);
+ fx_view=AcquireAuthenticCacheView(fx_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,fx_image,fx_image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) fx_image->rows; y++)
+ {
+ const int
+ id = GetOpenMPThreadId();
+
+ 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(fx_view,0,y,fx_image->columns,1,exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) fx_image->columns; x++)
+ {
+ register ssize_t
+ i;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ double
+ alpha;
+
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ PixelTrait fx_traits=GetPixelChannelTraits(fx_image,channel);
+ if ((traits == UndefinedPixelTrait) ||
+ (fx_traits == UndefinedPixelTrait))
+ continue;
+ if ((fx_traits & CopyPixelTrait) != 0)
+ {
+ SetPixelChannel(fx_image,channel,p[i],q);
+ continue;
+ }
+ alpha=0.0;
+ (void) FxEvaluateChannelExpression(fx_info[id],channel,x,y,&alpha,
+ exception);
+ q[i]=ClampToQuantum(QuantumRange*alpha);
+ }
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(fx_image);
+ }
+ if (SyncCacheViewAuthenticPixels(fx_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_FxImage)
+#endif
+ proceed=SetImageProgress(image,FxImageTag,progress++,image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ fx_view=DestroyCacheView(fx_view);
+ image_view=DestroyCacheView(image_view);
+ fx_info=DestroyFxThreadSet(fx_info);
+ if (status == MagickFalse)
+ fx_image=DestroyImage(fx_image);
+ return(fx_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% I m p l o d e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ImplodeImage() creates a new image that is a copy of an existing
+% one with the image pixels "implode" by the specified percentage. It
+% allocates the memory necessary for the new Image structure and returns a
+% pointer to the new image.
+%
+% The format of the ImplodeImage method is:
+%
+% Image *ImplodeImage(const Image *image,const double amount,
+% const PixelInterpolateMethod method,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o implode_image: Method ImplodeImage returns a pointer to the image
+% after it is implode. A null image is returned if there is a memory
+% shortage.
+%
+% o image: the image.
+%
+% o amount: Define the extent of the implosion.
+%
+% o method: the pixel interpolation method.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *ImplodeImage(const Image *image,const double amount,
+ const PixelInterpolateMethod method,ExceptionInfo *exception)
+{
+#define ImplodeImageTag "Implode/Image"
+
+ CacheView
+ *canvas_view,
+ *implode_view,
+ *interpolate_view;
+
+ Image
+ *canvas,
+ *implode_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ double
+ radius;
+
+ PointInfo
+ center,
+ scale;
+
+ ssize_t
+ y;
+
+ /*
+ Initialize implode image attributes.
+ */
+ assert(image != (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);
+ canvas=CloneImage(image,0,0,MagickTrue,exception);
+ if (canvas == (Image *) NULL)
+ return((Image *) NULL);
+ if ((canvas->alpha_trait == UndefinedPixelTrait) &&
+ (canvas->background_color.alpha != OpaqueAlpha))
+ (void) SetImageAlphaChannel(canvas,OpaqueAlphaChannel,exception);
+ implode_image=CloneImage(canvas,canvas->columns,canvas->rows,MagickTrue,
+ exception);
+ if (implode_image == (Image *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ if (SetImageStorageClass(implode_image,DirectClass,exception) == MagickFalse)
+ {
+ canvas=DestroyImage(canvas);
+ implode_image=DestroyImage(implode_image);
+ return((Image *) NULL);
+ }
+ /*
+ Compute scaling factor.
+ */
+ scale.x=1.0;
+ scale.y=1.0;
+ center.x=0.5*canvas->columns;
+ center.y=0.5*canvas->rows;
+ radius=center.x;
+ if (canvas->columns > canvas->rows)
+ scale.y=(double) canvas->columns/(double) canvas->rows;
+ else
+ if (canvas->columns < canvas->rows)
+ {
+ scale.x=(double) canvas->rows/(double) canvas->columns;
+ radius=center.y;
+ }
+ /*
+ Implode image.
+ */
+ status=MagickTrue;
+ progress=0;
+ canvas_view=AcquireVirtualCacheView(canvas,exception);
+ interpolate_view=AcquireVirtualCacheView(canvas,exception);
+ implode_view=AcquireAuthenticCacheView(implode_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(canvas,implode_image,canvas->rows,1)
+#endif
+ for (y=0; y < (ssize_t) canvas->rows; y++)
+ {
+ double
+ distance;
+
+ PointInfo
+ delta;
+
+ register const Quantum
+ *magick_restrict p;
+
+ register ssize_t
+ x;
+
+ register Quantum
+ *magick_restrict q;
+
+ if (status == MagickFalse)
+ continue;
+ p=GetCacheViewVirtualPixels(canvas_view,0,y,canvas->columns,1,exception);
+ q=QueueCacheViewAuthenticPixels(implode_view,0,y,implode_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ delta.y=scale.y*(double) (y-center.y);
+ for (x=0; x < (ssize_t) canvas->columns; x++)
+ {
+ register ssize_t
+ i;
+
+ /*
+ Determine if the pixel is within an ellipse.
+ */
+ delta.x=scale.x*(double) (x-center.x);
+ distance=delta.x*delta.x+delta.y*delta.y;
+ if (distance >= (radius*radius))
+ for (i=0; i < (ssize_t) GetPixelChannels(canvas); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(canvas,i);
+ PixelTrait traits = GetPixelChannelTraits(canvas,channel);
+ PixelTrait implode_traits = GetPixelChannelTraits(implode_image,
+ channel);
+ if ((traits == UndefinedPixelTrait) ||
+ (implode_traits == UndefinedPixelTrait))
+ continue;
+ SetPixelChannel(implode_image,channel,p[i],q);
+ }
+ else
+ {
+ double
+ factor;
+
+ /*
+ Implode the pixel.
+ */
+ factor=1.0;
+ if (distance > 0.0)
+ factor=pow(sin(MagickPI*sqrt((double) distance)/radius/2),-amount);
+ status=InterpolatePixelChannels(canvas,interpolate_view,implode_image,
+ method,(double) (factor*delta.x/scale.x+center.x),(double) (factor*
+ delta.y/scale.y+center.y),q,exception);
+ if (status == MagickFalse)
+ break;
+ }
+ p+=GetPixelChannels(canvas);
+ q+=GetPixelChannels(implode_image);
+ }
+ if (SyncCacheViewAuthenticPixels(implode_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (canvas->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_ImplodeImage)
+#endif
+ proceed=SetImageProgress(canvas,ImplodeImageTag,progress++,
+ canvas->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ implode_view=DestroyCacheView(implode_view);
+ interpolate_view=DestroyCacheView(interpolate_view);
+ canvas_view=DestroyCacheView(canvas_view);
+ canvas=DestroyImage(canvas);
+ if (status == MagickFalse)
+ implode_image=DestroyImage(implode_image);
+ return(implode_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% M o r p h I m a g e s %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% The MorphImages() method requires a minimum of two images. The first
+% image is transformed into the second by a number of intervening images
+% as specified by frames.
+%
+% The format of the MorphImage method is:
+%
+% Image *MorphImages(const Image *image,const size_t number_frames,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o number_frames: Define the number of in-between image to generate.
+% The more in-between frames, the smoother the morph.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *MorphImages(const Image *image,const size_t number_frames,
+ ExceptionInfo *exception)
+{
+#define MorphImageTag "Morph/Image"
+
+ double
+ alpha,
+ beta;
+
+ Image
+ *morph_image,
+ *morph_images;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ scene;
+
+ register const Image
+ *next;
+
+ register ssize_t
+ n;
+
+ ssize_t
+ y;
+
+ /*
+ Clone first frame in sequence.
+ */
+ assert(image != (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);
+ morph_images=CloneImage(image,0,0,MagickTrue,exception);
+ if (morph_images == (Image *) NULL)
+ return((Image *) NULL);
+ if (GetNextImageInList(image) == (Image *) NULL)
+ {
+ /*
+ Morph single image.
+ */
+ for (n=1; n < (ssize_t) number_frames; n++)
+ {
+ morph_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (morph_image == (Image *) NULL)
+ {
+ morph_images=DestroyImageList(morph_images);
+ return((Image *) NULL);
+ }
+ AppendImageToList(&morph_images,morph_image);
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+ proceed=SetImageProgress(image,MorphImageTag,(MagickOffsetType) n,
+ number_frames);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ return(GetFirstImageInList(morph_images));
+ }
+ /*
+ Morph image sequence.
+ */
+ status=MagickTrue;
+ scene=0;
+ next=image;
+ for ( ; GetNextImageInList(next) != (Image *) NULL; next=GetNextImageInList(next))
+ {
+ for (n=0; n < (ssize_t) number_frames; n++)
+ {
+ CacheView
+ *image_view,
+ *morph_view;
+
+ beta=(double) (n+1.0)/(double) (number_frames+1.0);
+ alpha=1.0-beta;
+ morph_image=ResizeImage(next,(size_t) (alpha*next->columns+beta*
+ GetNextImageInList(next)->columns+0.5),(size_t) (alpha*next->rows+beta*
+ GetNextImageInList(next)->rows+0.5),next->filter,exception);
+ if (morph_image == (Image *) NULL)
+ {
+ morph_images=DestroyImageList(morph_images);
+ return((Image *) NULL);
+ }
+ status=SetImageStorageClass(morph_image,DirectClass,exception);
+ if (status == MagickFalse)
+ {
+ morph_image=DestroyImage(morph_image);
+ return((Image *) NULL);
+ }
+ AppendImageToList(&morph_images,morph_image);
+ morph_images=GetLastImageInList(morph_images);
+ morph_image=ResizeImage(GetNextImageInList(next),morph_images->columns,
+ morph_images->rows,GetNextImageInList(next)->filter,exception);
+ if (morph_image == (Image *) NULL)
+ {
+ morph_images=DestroyImageList(morph_images);
+ return((Image *) NULL);
+ }
+ image_view=AcquireVirtualCacheView(morph_image,exception);
+ morph_view=AcquireAuthenticCacheView(morph_images,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(status) \
+ magick_number_threads(morph_image,morph_image,morph_image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) morph_images->rows; y++)
+ {
+ MagickBooleanType
+ sync;
+
+ 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,morph_image->columns,1,
+ exception);
+ q=GetCacheViewAuthenticPixels(morph_view,0,y,morph_images->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) morph_images->columns; x++)
+ {
+ register ssize_t
+ i;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(morph_image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(morph_image,i);
+ PixelTrait traits = GetPixelChannelTraits(morph_image,channel);
+ PixelTrait morph_traits=GetPixelChannelTraits(morph_images,channel);
+ if ((traits == UndefinedPixelTrait) ||
+ (morph_traits == UndefinedPixelTrait))
+ continue;
+ if ((morph_traits & CopyPixelTrait) != 0)
+ {
+ SetPixelChannel(morph_image,channel,p[i],q);
+ continue;
+ }
+ SetPixelChannel(morph_image,channel,ClampToQuantum(alpha*
+ GetPixelChannel(morph_images,channel,q)+beta*p[i]),q);
+ }
+ p+=GetPixelChannels(morph_image);
+ q+=GetPixelChannels(morph_images);
+ }
+ sync=SyncCacheViewAuthenticPixels(morph_view,exception);
+ if (sync == MagickFalse)
+ status=MagickFalse;
+ }
+ morph_view=DestroyCacheView(morph_view);
+ image_view=DestroyCacheView(image_view);
+ morph_image=DestroyImage(morph_image);
+ }
+ if (n < (ssize_t) number_frames)
+ break;
+ /*
+ Clone last frame in sequence.
+ */
+ morph_image=CloneImage(GetNextImageInList(next),0,0,MagickTrue,exception);
+ if (morph_image == (Image *) NULL)
+ {
+ morph_images=DestroyImageList(morph_images);
+ return((Image *) NULL);
+ }
+ AppendImageToList(&morph_images,morph_image);
+ morph_images=GetLastImageInList(morph_images);
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_MorphImages)
+#endif
+ proceed=SetImageProgress(image,MorphImageTag,scene,
+ GetImageListLength(image));
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ scene++;
+ }
+ if (GetNextImageInList(next) != (Image *) NULL)
+ {
+ morph_images=DestroyImageList(morph_images);
+ return((Image *) NULL);
+ }
+ return(GetFirstImageInList(morph_images));
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% P l a s m a I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% PlasmaImage() initializes an image with plasma fractal values. The image
+% must be initialized with a base color and the random number generator
+% seeded before this method is called.
+%
+% The format of the PlasmaImage method is:
+%
+% MagickBooleanType PlasmaImage(Image *image,const SegmentInfo *segment,
+% size_t attenuate,size_t depth,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o segment: Define the region to apply plasma fractals values.
+%
+% o attenuate: Define the plasma attenuation factor.
+%
+% o depth: Limit the plasma recursion depth.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+
+static inline Quantum PlasmaPixel(RandomInfo *random_info,
+ const double pixel,const double noise)
+{
+ Quantum
+ plasma;
+
+ plasma=ClampToQuantum(pixel+noise*GetPseudoRandomValue(random_info)-
+ noise/2.0);
+ if (plasma <= 0)
+ return((Quantum) 0);
+ if (plasma >= QuantumRange)
+ return(QuantumRange);
+ return(plasma);
+}
+
+static MagickBooleanType PlasmaImageProxy(Image *image,CacheView *image_view,
+ CacheView *u_view,CacheView *v_view,RandomInfo *random_info,
+ const SegmentInfo *segment,size_t attenuate,size_t depth,
+ ExceptionInfo *exception)
+{
+ double
+ plasma;
+
+ register const Quantum
+ *magick_restrict u,
+ *magick_restrict v;
+
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ i;
+
+ ssize_t
+ x,
+ x_mid,
+ y,
+ y_mid;
+
+ if ((fabs(segment->x2-segment->x1) <= MagickEpsilon) &&
+ (fabs(segment->y2-segment->y1) <= MagickEpsilon))
+ return(MagickTrue);
+ if (depth != 0)
+ {
+ MagickBooleanType
+ status;
+
+ SegmentInfo
+ local_info;
+
+ /*
+ Divide the area into quadrants and recurse.
+ */
+ depth--;
+ attenuate++;
+ x_mid=(ssize_t) ceil((segment->x1+segment->x2)/2-0.5);
+ y_mid=(ssize_t) ceil((segment->y1+segment->y2)/2-0.5);
+ local_info=(*segment);
+ local_info.x2=(double) x_mid;
+ local_info.y2=(double) y_mid;
+ (void) PlasmaImageProxy(image,image_view,u_view,v_view,random_info,
+ &local_info,attenuate,depth,exception);
+ local_info=(*segment);
+ local_info.y1=(double) y_mid;
+ local_info.x2=(double) x_mid;
+ (void) PlasmaImageProxy(image,image_view,u_view,v_view,random_info,
+ &local_info,attenuate,depth,exception);
+ local_info=(*segment);
+ local_info.x1=(double) x_mid;
+ local_info.y2=(double) y_mid;
+ (void) PlasmaImageProxy(image,image_view,u_view,v_view,random_info,
+ &local_info,attenuate,depth,exception);
+ local_info=(*segment);
+ local_info.x1=(double) x_mid;
+ local_info.y1=(double) y_mid;
+ status=PlasmaImageProxy(image,image_view,u_view,v_view,random_info,
+ &local_info,attenuate,depth,exception);
+ return(status);
+ }
+ x_mid=(ssize_t) ceil((segment->x1+segment->x2)/2-0.5);
+ y_mid=(ssize_t) ceil((segment->y1+segment->y2)/2-0.5);
+ if ((fabs(segment->x1-x_mid) < MagickEpsilon) &&
+ (fabs(segment->x2-x_mid) < MagickEpsilon) &&
+ (fabs(segment->y1-y_mid) < MagickEpsilon) &&
+ (fabs(segment->y2-y_mid) < MagickEpsilon))
+ return(MagickFalse);
+ /*
+ Average pixels and apply plasma.
+ */
+ plasma=(double) QuantumRange/(2.0*attenuate);
+ if ((fabs(segment->x1-x_mid) > MagickEpsilon) ||
+ (fabs(segment->x2-x_mid) > MagickEpsilon))
+ {
+ /*
+ Left pixel.
+ */
+ x=(ssize_t) ceil(segment->x1-0.5);
+ u=GetCacheViewVirtualPixels(u_view,x,(ssize_t) ceil(segment->y1-0.5),1,1,
+ exception);
+ v=GetCacheViewVirtualPixels(v_view,x,(ssize_t) ceil(segment->y2-0.5),1,1,
+ exception);
+ q=QueueCacheViewAuthenticPixels(image_view,x,y_mid,1,1,exception);
+ if ((u == (const Quantum *) NULL) || (v == (const Quantum *) NULL) ||
+ (q == (Quantum *) NULL))
+ return(MagickTrue);
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=PlasmaPixel(random_info,(u[i]+v[i])/2.0,plasma);
+ }
+ (void) SyncCacheViewAuthenticPixels(image_view,exception);
+ if (fabs(segment->x1-segment->x2) > MagickEpsilon)
+ {
+ /*
+ Right pixel.
+ */
+ x=(ssize_t) ceil(segment->x2-0.5);
+ u=GetCacheViewVirtualPixels(u_view,x,(ssize_t) ceil(segment->y1-0.5),
+ 1,1,exception);
+ v=GetCacheViewVirtualPixels(v_view,x,(ssize_t) ceil(segment->y2-0.5),
+ 1,1,exception);
+ q=QueueCacheViewAuthenticPixels(image_view,x,y_mid,1,1,exception);
+ if ((u == (const Quantum *) NULL) || (v == (const Quantum *) NULL) ||
+ (q == (Quantum *) NULL))
+ return(MagickTrue);
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=PlasmaPixel(random_info,(u[i]+v[i])/2.0,plasma);
+ }
+ (void) SyncCacheViewAuthenticPixels(image_view,exception);
+ }
+ }
+ if ((fabs(segment->y1-y_mid) > MagickEpsilon) ||
+ (fabs(segment->y2-y_mid) > MagickEpsilon))
+ {
+ if ((fabs(segment->x1-x_mid) > MagickEpsilon) ||
+ (fabs(segment->y2-y_mid) > MagickEpsilon))
+ {
+ /*
+ Bottom pixel.
+ */
+ y=(ssize_t) ceil(segment->y2-0.5);
+ u=GetCacheViewVirtualPixels(u_view,(ssize_t) ceil(segment->x1-0.5),y,
+ 1,1,exception);
+ v=GetCacheViewVirtualPixels(v_view,(ssize_t) ceil(segment->x2-0.5),y,
+ 1,1,exception);
+ q=QueueCacheViewAuthenticPixels(image_view,x_mid,y,1,1,exception);
+ if ((u == (const Quantum *) NULL) || (v == (const Quantum *) NULL) ||
+ (q == (Quantum *) NULL))
+ return(MagickTrue);
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=PlasmaPixel(random_info,(u[i]+v[i])/2.0,plasma);
+ }
+ (void) SyncCacheViewAuthenticPixels(image_view,exception);
+ }
+ if (fabs(segment->y1-segment->y2) > MagickEpsilon)
+ {
+ /*
+ Top pixel.
+ */
+ y=(ssize_t) ceil(segment->y1-0.5);
+ u=GetCacheViewVirtualPixels(u_view,(ssize_t) ceil(segment->x1-0.5),y,
+ 1,1,exception);
+ v=GetCacheViewVirtualPixels(v_view,(ssize_t) ceil(segment->x2-0.5),y,
+ 1,1,exception);
+ q=QueueCacheViewAuthenticPixels(image_view,x_mid,y,1,1,exception);
+ if ((u == (const Quantum *) NULL) || (v == (const Quantum *) NULL) ||
+ (q == (Quantum *) NULL))
+ return(MagickTrue);
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=PlasmaPixel(random_info,(u[i]+v[i])/2.0,plasma);
+ }
+ (void) SyncCacheViewAuthenticPixels(image_view,exception);
+ }
+ }
+ if ((fabs(segment->x1-segment->x2) > MagickEpsilon) ||
+ (fabs(segment->y1-segment->y2) > MagickEpsilon))
+ {
+ /*
+ Middle pixel.
+ */
+ x=(ssize_t) ceil(segment->x1-0.5);
+ y=(ssize_t) ceil(segment->y1-0.5);
+ u=GetCacheViewVirtualPixels(u_view,x,y,1,1,exception);
+ x=(ssize_t) ceil(segment->x2-0.5);
+ y=(ssize_t) ceil(segment->y2-0.5);
+ v=GetCacheViewVirtualPixels(v_view,x,y,1,1,exception);
+ q=QueueCacheViewAuthenticPixels(image_view,x_mid,y_mid,1,1,exception);
+ if ((u == (const Quantum *) NULL) || (v == (const Quantum *) NULL) ||
+ (q == (Quantum *) NULL))
+ return(MagickTrue);
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=PlasmaPixel(random_info,(u[i]+v[i])/2.0,plasma);
+ }
+ (void) SyncCacheViewAuthenticPixels(image_view,exception);
+ }
+ if ((fabs(segment->x2-segment->x1) < 3.0) &&
+ (fabs(segment->y2-segment->y1) < 3.0))
+ return(MagickTrue);
+ return(MagickFalse);
+}
+
+MagickExport MagickBooleanType PlasmaImage(Image *image,
+ const SegmentInfo *segment,size_t attenuate,size_t depth,
+ ExceptionInfo *exception)
+{
+ CacheView
+ *image_view,
+ *u_view,
+ *v_view;
+
+ MagickBooleanType
+ status;
+
+ RandomInfo
+ *random_info;
+
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
+ assert(image != (Image *) NULL);
+ assert(image->signature == MagickCoreSignature);
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"...");
+ if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse)
+ return(MagickFalse);
+ image_view=AcquireAuthenticCacheView(image,exception);
+ u_view=AcquireVirtualCacheView(image,exception);
+ v_view=AcquireVirtualCacheView(image,exception);
+ random_info=AcquireRandomInfo();
+ status=PlasmaImageProxy(image,image_view,u_view,v_view,random_info,segment,
+ attenuate,depth,exception);
+ random_info=DestroyRandomInfo(random_info);
+ v_view=DestroyCacheView(v_view);
+ u_view=DestroyCacheView(u_view);
+ image_view=DestroyCacheView(image_view);
+ return(status);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% P o l a r o i d I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% PolaroidImage() simulates a Polaroid picture.
+%
+% The format of the PolaroidImage method is:
+%
+% Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
+% const char *caption,const double angle,
+% const PixelInterpolateMethod method,ExceptionInfo exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o draw_info: the draw info.
+%
+% o caption: the Polaroid caption.
+%
+% o angle: Apply the effect along this angle.
+%
+% o method: the pixel interpolation method.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *PolaroidImage(const Image *image,const DrawInfo *draw_info,
+ const char *caption,const double angle,const PixelInterpolateMethod method,
+ ExceptionInfo *exception)
+{
+ Image
+ *bend_image,
+ *caption_image,
+ *flop_image,
+ *picture_image,
+ *polaroid_image,
+ *rotate_image,
+ *trim_image;
+
+ size_t
+ height;
+
+ ssize_t
+ quantum;
+
+ /*
+ Simulate a Polaroid picture.
+ */
+ assert(image != (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);
+ quantum=(ssize_t) MagickMax(MagickMax((double) image->columns,(double)
+ image->rows)/25.0,10.0);
+ height=image->rows+2*quantum;
+ caption_image=(Image *) NULL;
+ if (caption != (const char *) NULL)
+ {
+ char
+ geometry[MagickPathExtent],
+ *text;
+
+ DrawInfo
+ *annotate_info;
+
+ ImageInfo
+ *image_info;
+
+ MagickBooleanType
+ status;
+
+ ssize_t
+ count;
+
+ TypeMetric
+ metrics;
+
+ /*
+ Generate caption image.
+ */
+ caption_image=CloneImage(image,image->columns,1,MagickTrue,exception);
+ if (caption_image == (Image *) NULL)
+ return((Image *) NULL);
+ image_info=AcquireImageInfo();
+ annotate_info=CloneDrawInfo((const ImageInfo *) NULL,draw_info);
+ text=InterpretImageProperties(image_info,(Image *) image,caption,
+ exception);
+ image_info=DestroyImageInfo(image_info);
+ (void) CloneString(&annotate_info->text,text);
+ count=FormatMagickCaption(caption_image,annotate_info,MagickTrue,&metrics,
+ &text,exception);
+ status=SetImageExtent(caption_image,image->columns,(size_t) ((count+1)*
+ (metrics.ascent-metrics.descent)+0.5),exception);
+ if (status == MagickFalse)
+ caption_image=DestroyImage(caption_image);
+ else
+ {
+ caption_image->background_color=image->border_color;
+ (void) SetImageBackgroundColor(caption_image,exception);
+ (void) CloneString(&annotate_info->text,text);
+ (void) FormatLocaleString(geometry,MagickPathExtent,"+0+%.20g",
+ metrics.ascent);
+ if (annotate_info->gravity == UndefinedGravity)
+ (void) CloneString(&annotate_info->geometry,AcquireString(
+ geometry));
+ (void) AnnotateImage(caption_image,annotate_info,exception);
+ height+=caption_image->rows;
+ }
+ annotate_info=DestroyDrawInfo(annotate_info);
+ text=DestroyString(text);
+ }
+ picture_image=CloneImage(image,image->columns+2*quantum,height,MagickTrue,
+ exception);
+ if (picture_image == (Image *) NULL)
+ {
+ if (caption_image != (Image *) NULL)
+ caption_image=DestroyImage(caption_image);
+ return((Image *) NULL);
+ }
+ picture_image->background_color=image->border_color;
+ (void) SetImageBackgroundColor(picture_image,exception);
+ (void) CompositeImage(picture_image,image,OverCompositeOp,MagickTrue,quantum,
+ quantum,exception);
+ if (caption_image != (Image *) NULL)
+ {
+ (void) CompositeImage(picture_image,caption_image,OverCompositeOp,
+ MagickTrue,quantum,(ssize_t) (image->rows+3*quantum/2),exception);
+ caption_image=DestroyImage(caption_image);
+ }
+ (void) QueryColorCompliance("none",AllCompliance,
+ &picture_image->background_color,exception);
+ (void) SetImageAlphaChannel(picture_image,OpaqueAlphaChannel,exception);
+ rotate_image=RotateImage(picture_image,90.0,exception);
+ picture_image=DestroyImage(picture_image);
+ if (rotate_image == (Image *) NULL)
+ return((Image *) NULL);
+ picture_image=rotate_image;
+ bend_image=WaveImage(picture_image,0.01*picture_image->rows,2.0*
+ picture_image->columns,method,exception);
+ picture_image=DestroyImage(picture_image);
+ if (bend_image == (Image *) NULL)
+ return((Image *) NULL);
+ picture_image=bend_image;
+ rotate_image=RotateImage(picture_image,-90.0,exception);
+ picture_image=DestroyImage(picture_image);
+ if (rotate_image == (Image *) NULL)
+ return((Image *) NULL);
+ picture_image=rotate_image;
+ picture_image->background_color=image->background_color;
+ polaroid_image=ShadowImage(picture_image,80.0,2.0,quantum/3,quantum/3,
+ exception);
+ if (polaroid_image == (Image *) NULL)
+ {
+ picture_image=DestroyImage(picture_image);
+ return(picture_image);
+ }
+ flop_image=FlopImage(polaroid_image,exception);
+ polaroid_image=DestroyImage(polaroid_image);
+ if (flop_image == (Image *) NULL)
+ {
+ picture_image=DestroyImage(picture_image);
+ return(picture_image);
+ }
+ polaroid_image=flop_image;
+ (void) CompositeImage(polaroid_image,picture_image,OverCompositeOp,
+ MagickTrue,(ssize_t) (-0.01*picture_image->columns/2.0),0L,exception);
+ picture_image=DestroyImage(picture_image);
+ (void) QueryColorCompliance("none",AllCompliance,
+ &polaroid_image->background_color,exception);
+ rotate_image=RotateImage(polaroid_image,angle,exception);
+ polaroid_image=DestroyImage(polaroid_image);
+ if (rotate_image == (Image *) NULL)
+ return((Image *) NULL);
+ polaroid_image=rotate_image;
+ trim_image=TrimImage(polaroid_image,exception);
+ polaroid_image=DestroyImage(polaroid_image);
+ if (trim_image == (Image *) NULL)
+ return((Image *) NULL);
+ polaroid_image=trim_image;
+ return(polaroid_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S e p i a T o n e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% MagickSepiaToneImage() applies a special effect to the image, similar to the
+% effect achieved in a photo darkroom by sepia toning. Threshold ranges from
+% 0 to QuantumRange and is a measure of the extent of the sepia toning. A
+% threshold of 80% is a good starting point for a reasonable tone.
+%
+% The format of the SepiaToneImage method is:
+%
+% Image *SepiaToneImage(const Image *image,const double threshold,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o threshold: the tone threshold.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *SepiaToneImage(const Image *image,const double threshold,
+ ExceptionInfo *exception)
+{
+#define SepiaToneImageTag "SepiaTone/Image"
+
+ CacheView
+ *image_view,
+ *sepia_view;
+
+ Image
+ *sepia_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ ssize_t
+ y;
+
+ /*
+ Initialize sepia-toned 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);
+ sepia_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (sepia_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(sepia_image,DirectClass,exception) == MagickFalse)
+ {
+ sepia_image=DestroyImage(sepia_image);
+ return((Image *) NULL);
+ }
+ /*
+ Tone each row of the image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(image,exception);
+ sepia_view=AcquireAuthenticCacheView(sepia_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,sepia_image,image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) 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=GetCacheViewAuthenticPixels(sepia_view,0,y,sepia_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ double
+ intensity,
+ tone;
+
+ intensity=GetPixelIntensity(image,p);
+ tone=intensity > threshold ? (double) QuantumRange : intensity+
+ (double) QuantumRange-threshold;
+ SetPixelRed(sepia_image,ClampToQuantum(tone),q);
+ tone=intensity > (7.0*threshold/6.0) ? (double) QuantumRange :
+ intensity+(double) QuantumRange-7.0*threshold/6.0;
+ SetPixelGreen(sepia_image,ClampToQuantum(tone),q);
+ tone=intensity < (threshold/6.0) ? 0 : intensity-threshold/6.0;
+ SetPixelBlue(sepia_image,ClampToQuantum(tone),q);
+ tone=threshold/7.0;
+ if ((double) GetPixelGreen(image,q) < tone)
+ SetPixelGreen(sepia_image,ClampToQuantum(tone),q);
+ if ((double) GetPixelBlue(image,q) < tone)
+ SetPixelBlue(sepia_image,ClampToQuantum(tone),q);
+ SetPixelAlpha(sepia_image,GetPixelAlpha(image,p),q);
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(sepia_image);
+ }
+ if (SyncCacheViewAuthenticPixels(sepia_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_SepiaToneImage)
+#endif
+ proceed=SetImageProgress(image,SepiaToneImageTag,progress++,
+ image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ sepia_view=DestroyCacheView(sepia_view);
+ image_view=DestroyCacheView(image_view);
+ (void) NormalizeImage(sepia_image,exception);
+ (void) ContrastImage(sepia_image,MagickTrue,exception);
+ if (status == MagickFalse)
+ sepia_image=DestroyImage(sepia_image);
+ return(sepia_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S h a d o w I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ShadowImage() simulates a shadow from the specified image and returns it.
+%
+% The format of the ShadowImage method is:
+%
+% Image *ShadowImage(const Image *image,const double alpha,
+% const double sigma,const ssize_t x_offset,const ssize_t y_offset,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o alpha: percentage transparency.
+%
+% o sigma: the standard deviation of the Gaussian, in pixels.
+%
+% o x_offset: the shadow x-offset.
+%
+% o y_offset: the shadow y-offset.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *ShadowImage(const Image *image,const double alpha,
+ const double sigma,const ssize_t x_offset,const ssize_t y_offset,
+ ExceptionInfo *exception)
+{
+#define ShadowImageTag "Shadow/Image"
+
+ CacheView
+ *image_view;
+
+ ChannelType
+ channel_mask;
+
+ Image
+ *border_image,
+ *clone_image,
+ *shadow_image;
+
+ MagickBooleanType
+ status;
+
+ PixelInfo
+ background_color;
+
+ RectangleInfo
+ border_info;
+
+ ssize_t
+ y;
+
+ assert(image != (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);
+ clone_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (clone_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (IsGrayColorspace(image->colorspace) != MagickFalse)
+ (void) SetImageColorspace(clone_image,sRGBColorspace,exception);
+ (void) SetImageVirtualPixelMethod(clone_image,EdgeVirtualPixelMethod,
+ exception);
+ border_info.width=(size_t) floor(2.0*sigma+0.5);
+ border_info.height=(size_t) floor(2.0*sigma+0.5);
+ border_info.x=0;
+ border_info.y=0;
+ (void) QueryColorCompliance("none",AllCompliance,&clone_image->border_color,
+ exception);
+ clone_image->alpha_trait=BlendPixelTrait;
+ border_image=BorderImage(clone_image,&border_info,OverCompositeOp,exception);
+ clone_image=DestroyImage(clone_image);
+ if (border_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (border_image->alpha_trait == UndefinedPixelTrait)
+ (void) SetImageAlphaChannel(border_image,OpaqueAlphaChannel,exception);
+ /*
+ Shadow image.
+ */
+ status=MagickTrue;
+ background_color=border_image->background_color;
+ background_color.alpha_trait=BlendPixelTrait;
+ image_view=AcquireAuthenticCacheView(border_image,exception);
+ for (y=0; y < (ssize_t) border_image->rows; y++)
+ {
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ if (status == MagickFalse)
+ continue;
+ q=QueueCacheViewAuthenticPixels(image_view,0,y,border_image->columns,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) border_image->columns; x++)
+ {
+ if (border_image->alpha_trait != UndefinedPixelTrait)
+ background_color.alpha=GetPixelAlpha(border_image,q)*alpha/100.0;
+ SetPixelViaPixelInfo(border_image,&background_color,q);
+ q+=GetPixelChannels(border_image);
+ }
+ if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse)
+ status=MagickFalse;
+ }
+ image_view=DestroyCacheView(image_view);
+ if (status == MagickFalse)
+ {
+ border_image=DestroyImage(border_image);
+ return((Image *) NULL);
+ }
+ channel_mask=SetImageChannelMask(border_image,AlphaChannel);
+ shadow_image=BlurImage(border_image,0.0,sigma,exception);
+ border_image=DestroyImage(border_image);
+ if (shadow_image == (Image *) NULL)
+ return((Image *) NULL);
+ (void) SetPixelChannelMask(shadow_image,channel_mask);
+ if (shadow_image->page.width == 0)
+ shadow_image->page.width=shadow_image->columns;
+ if (shadow_image->page.height == 0)
+ shadow_image->page.height=shadow_image->rows;
+ shadow_image->page.width+=x_offset-(ssize_t) border_info.width;
+ shadow_image->page.height+=y_offset-(ssize_t) border_info.height;
+ shadow_image->page.x+=x_offset-(ssize_t) border_info.width;
+ shadow_image->page.y+=y_offset-(ssize_t) border_info.height;
+ return(shadow_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S k e t c h I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% SketchImage() simulates a pencil sketch. We convolve the image with a
+% Gaussian operator of the given radius and standard deviation (sigma). For
+% reasonable results, radius should be larger than sigma. Use a radius of 0
+% and SketchImage() selects a suitable radius for you. Angle gives the angle
+% of the sketch.
+%
+% The format of the SketchImage method is:
+%
+% Image *SketchImage(const Image *image,const double radius,
+% const double sigma,const double angle,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o radius: the radius of the Gaussian, in pixels, not counting the
+% center pixel.
+%
+% o sigma: the standard deviation of the Gaussian, in pixels.
+%
+% o angle: apply the effect along this angle.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *SketchImage(const Image *image,const double radius,
+ const double sigma,const double angle,ExceptionInfo *exception)
+{
+ CacheView
+ *random_view;
+
+ Image
+ *blend_image,
+ *blur_image,
+ *dodge_image,
+ *random_image,
+ *sketch_image;
+
+ MagickBooleanType
+ status;
+
+ RandomInfo
+ **magick_restrict random_info;
+
+ ssize_t
+ y;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ unsigned long
+ key;
+#endif
+
+ /*
+ Sketch image.
+ */
+ random_image=CloneImage(image,image->columns << 1,image->rows << 1,
+ MagickTrue,exception);
+ if (random_image == (Image *) NULL)
+ return((Image *) NULL);
+ status=MagickTrue;
+ random_info=AcquireRandomInfoThreadSet();
+ random_view=AcquireAuthenticCacheView(random_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ key=GetRandomSecretKey(random_info[0]);
+ #pragma omp parallel for schedule(static) shared(status) \
+ magick_number_threads(random_image,random_image,random_image->rows,key == ~0UL)
+#endif
+ for (y=0; y < (ssize_t) random_image->rows; y++)
+ {
+ const int
+ id = GetOpenMPThreadId();
+
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ if (status == MagickFalse)
+ continue;
+ q=QueueCacheViewAuthenticPixels(random_view,0,y,random_image->columns,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) random_image->columns; x++)
+ {
+ double
+ value;
+
+ register ssize_t
+ i;
+
+ value=GetPseudoRandomValue(random_info[id]);
+ for (i=0; i < (ssize_t) GetPixelChannels(random_image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ q[i]=ClampToQuantum(QuantumRange*value);
+ }
+ q+=GetPixelChannels(random_image);
+ }
+ if (SyncCacheViewAuthenticPixels(random_view,exception) == MagickFalse)
+ status=MagickFalse;
+ }
+ random_view=DestroyCacheView(random_view);
+ random_info=DestroyRandomInfoThreadSet(random_info);
+ if (status == MagickFalse)
+ {
+ random_image=DestroyImage(random_image);
+ return(random_image);
+ }
+ blur_image=MotionBlurImage(random_image,radius,sigma,angle,exception);
+ random_image=DestroyImage(random_image);
+ if (blur_image == (Image *) NULL)
+ return((Image *) NULL);
+ dodge_image=EdgeImage(blur_image,radius,exception);
+ blur_image=DestroyImage(blur_image);
+ if (dodge_image == (Image *) NULL)
+ return((Image *) NULL);
+ (void) NormalizeImage(dodge_image,exception);
+ (void) NegateImage(dodge_image,MagickFalse,exception);
+ (void) TransformImage(&dodge_image,(char *) NULL,"50%",exception);
+ sketch_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (sketch_image == (Image *) NULL)
+ {
+ dodge_image=DestroyImage(dodge_image);
+ return((Image *) NULL);
+ }
+ (void) CompositeImage(sketch_image,dodge_image,ColorDodgeCompositeOp,
+ MagickTrue,0,0,exception);
+ dodge_image=DestroyImage(dodge_image);
+ blend_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (blend_image == (Image *) NULL)
+ {
+ sketch_image=DestroyImage(sketch_image);
+ return((Image *) NULL);
+ }
+ if (blend_image->alpha_trait != BlendPixelTrait)
+ (void) SetImageAlpha(blend_image,TransparentAlpha,exception);
+ (void) SetImageArtifact(blend_image,"compose:args","20x80");
+ (void) CompositeImage(sketch_image,blend_image,BlendCompositeOp,MagickTrue,
+ 0,0,exception);
+ blend_image=DestroyImage(blend_image);
+ return(sketch_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S o l a r i z e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% SolarizeImage() applies a special effect to the image, similar to the effect
+% achieved in a photo darkroom by selectively exposing areas of photo
+% sensitive paper to light. Threshold ranges from 0 to QuantumRange and is a
+% measure of the extent of the solarization.
+%
+% The format of the SolarizeImage method is:
+%
+% MagickBooleanType SolarizeImage(Image *image,const double threshold,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o threshold: Define the extent of the solarization.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport MagickBooleanType SolarizeImage(Image *image,
+ const double threshold,ExceptionInfo *exception)
+{
+#define SolarizeImageTag "Solarize/Image"
+
+ CacheView
+ *image_view;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ ssize_t
+ y;
+
+ assert(image != (Image *) NULL);
+ assert(image->signature == MagickCoreSignature);
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+ if (IsGrayColorspace(image->colorspace) != MagickFalse)
+ (void) SetImageColorspace(image,sRGBColorspace,exception);
+ if (image->storage_class == PseudoClass)
+ {
+ register ssize_t
+ i;
+
+ /*
+ Solarize colormap.
+ */
+ for (i=0; i < (ssize_t) image->colors; i++)
+ {
+ if ((double) image->colormap[i].red > threshold)
+ image->colormap[i].red=QuantumRange-image->colormap[i].red;
+ if ((double) image->colormap[i].green > threshold)
+ image->colormap[i].green=QuantumRange-image->colormap[i].green;
+ if ((double) image->colormap[i].blue > threshold)
+ image->colormap[i].blue=QuantumRange-image->colormap[i].blue;
+ }
+ }
+ /*
+ Solarize image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireAuthenticCacheView(image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,image,image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ register ssize_t
+ x;
+
+ register Quantum
+ *magick_restrict q;
+
+ if (status == MagickFalse)
+ continue;
+ q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ register ssize_t
+ i;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(image); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(image,i);
+ PixelTrait traits = GetPixelChannelTraits(image,channel);
+ if ((traits & UpdatePixelTrait) == 0)
+ continue;
+ if ((double) q[i] > threshold)
+ q[i]=QuantumRange-q[i];
+ }
+ q+=GetPixelChannels(image);
+ }
+ 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_SolarizeImage)
+#endif
+ proceed=SetImageProgress(image,SolarizeImageTag,progress++,image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ image_view=DestroyCacheView(image_view);
+ return(status);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S t e g a n o I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% SteganoImage() hides a digital watermark within the image. Recover
+% the hidden watermark later to prove that the authenticity of an image.
+% Offset defines the start position within the image to hide the watermark.
+%
+% The format of the SteganoImage method is:
+%
+% Image *SteganoImage(const Image *image,Image *watermark,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o watermark: the watermark image.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *SteganoImage(const Image *image,const Image *watermark,
+ ExceptionInfo *exception)
+{
+#define GetBit(alpha,i) ((((size_t) (alpha) >> (size_t) (i)) & 0x01) != 0)
+#define SetBit(alpha,i,set) (Quantum) ((set) != 0 ? (size_t) (alpha) \
+ | (one << (size_t) (i)) : (size_t) (alpha) & ~(one << (size_t) (i)))
+#define SteganoImageTag "Stegano/Image"
+
+ CacheView
+ *stegano_view,
+ *watermark_view;
+
+ Image
+ *stegano_image;
+
+ int
+ c;
+
+ MagickBooleanType
+ status;
+
+ PixelInfo
+ pixel;
+
+ register Quantum
+ *q;
+
+ register ssize_t
+ x;
+
+ size_t
+ depth,
+ one;
+
+ ssize_t
+ i,
+ j,
+ k,
+ y;
+
+ /*
+ Initialize steganographic image attributes.
+ */
+ assert(image != (const Image *) NULL);
+ assert(image->signature == MagickCoreSignature);
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+ assert(watermark != (const Image *) NULL);
+ assert(watermark->signature == MagickCoreSignature);
+ assert(exception != (ExceptionInfo *) NULL);
+ assert(exception->signature == MagickCoreSignature);
+ one=1UL;
+ stegano_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (stegano_image == (Image *) NULL)
+ return((Image *) NULL);
+ stegano_image->depth=MAGICKCORE_QUANTUM_DEPTH;
+ if (SetImageStorageClass(stegano_image,DirectClass,exception) == MagickFalse)
+ {
+ stegano_image=DestroyImage(stegano_image);
+ return((Image *) NULL);
+ }
+ /*
+ Hide watermark in low-order bits of image.
+ */
+ c=0;
+ i=0;
+ j=0;
+ depth=stegano_image->depth;
+ k=stegano_image->offset;
+ status=MagickTrue;
+ watermark_view=AcquireVirtualCacheView(watermark,exception);
+ stegano_view=AcquireAuthenticCacheView(stegano_image,exception);
+ for (i=(ssize_t) depth-1; (i >= 0) && (j < (ssize_t) depth); i--)
+ {
+ for (y=0; (y < (ssize_t) watermark->rows) && (j < (ssize_t) depth); y++)
+ {
+ for (x=0; (x < (ssize_t) watermark->columns) && (j < (ssize_t) depth); x++)
+ {
+ ssize_t
+ offset;
+
+ (void) GetOneCacheViewVirtualPixelInfo(watermark_view,x,y,&pixel,
+ exception);
+ offset=k/(ssize_t) stegano_image->columns;
+ if (offset >= (ssize_t) stegano_image->rows)
+ break;
+ q=GetCacheViewAuthenticPixels(stegano_view,k % (ssize_t)
+ stegano_image->columns,k/(ssize_t) stegano_image->columns,1,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ break;
+ switch (c)
+ {
+ case 0:
+ {
+ SetPixelRed(stegano_image,SetBit(GetPixelRed(stegano_image,q),j,
+ GetBit(GetPixelInfoIntensity(stegano_image,&pixel),i)),q);
+ break;
+ }
+ case 1:
+ {
+ SetPixelGreen(stegano_image,SetBit(GetPixelGreen(stegano_image,q),j,
+ GetBit(GetPixelInfoIntensity(stegano_image,&pixel),i)),q);
+ break;
+ }
+ case 2:
+ {
+ SetPixelBlue(stegano_image,SetBit(GetPixelBlue(stegano_image,q),j,
+ GetBit(GetPixelInfoIntensity(stegano_image,&pixel),i)),q);
+ break;
+ }
+ }
+ if (SyncCacheViewAuthenticPixels(stegano_view,exception) == MagickFalse)
+ break;
+ c++;
+ if (c == 3)
+ c=0;
+ k++;
+ if (k == (ssize_t) (stegano_image->columns*stegano_image->columns))
+ k=0;
+ if (k == stegano_image->offset)
+ j++;
+ }
+ }
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+ proceed=SetImageProgress(image,SteganoImageTag,(MagickOffsetType)
+ (depth-i),depth);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ stegano_view=DestroyCacheView(stegano_view);
+ watermark_view=DestroyCacheView(watermark_view);
+ if (status == MagickFalse)
+ stegano_image=DestroyImage(stegano_image);
+ return(stegano_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S t e r e o A n a g l y p h I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% StereoAnaglyphImage() combines two images and produces a single image that
+% is the composite of a left and right image of a stereo pair. Special
+% red-green stereo glasses are required to view this effect.
+%
+% The format of the StereoAnaglyphImage method is:
+%
+% Image *StereoImage(const Image *left_image,const Image *right_image,
+% ExceptionInfo *exception)
+% Image *StereoAnaglyphImage(const Image *left_image,
+% const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o left_image: the left image.
+%
+% o right_image: the right image.
+%
+% o exception: return any errors or warnings in this structure.
+%
+% o x_offset: amount, in pixels, by which the left image is offset to the
+% right of the right image.
+%
+% o y_offset: amount, in pixels, by which the left image is offset to the
+% bottom of the right image.
+%
+%
+*/
+MagickExport Image *StereoImage(const Image *left_image,
+ const Image *right_image,ExceptionInfo *exception)
+{
+ return(StereoAnaglyphImage(left_image,right_image,0,0,exception));
+}
+
+MagickExport Image *StereoAnaglyphImage(const Image *left_image,
+ const Image *right_image,const ssize_t x_offset,const ssize_t y_offset,
+ ExceptionInfo *exception)
+{
+#define StereoImageTag "Stereo/Image"
+
+ const Image
+ *image;
+
+ Image
+ *stereo_image;
+
+ MagickBooleanType
+ status;
+
+ ssize_t
+ y;
+
+ assert(left_image != (const Image *) NULL);
+ assert(left_image->signature == MagickCoreSignature);
+ if (left_image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
+ left_image->filename);
+ assert(right_image != (const Image *) NULL);
+ assert(right_image->signature == MagickCoreSignature);
+ assert(exception != (ExceptionInfo *) NULL);
+ assert(exception->signature == MagickCoreSignature);
+ assert(right_image != (const Image *) NULL);
+ image=left_image;
+ if ((left_image->columns != right_image->columns) ||
+ (left_image->rows != right_image->rows))
+ ThrowImageException(ImageError,"LeftAndRightImageSizesDiffer");
+ /*
+ Initialize stereo image attributes.
+ */
+ stereo_image=CloneImage(left_image,left_image->columns,left_image->rows,
+ MagickTrue,exception);
+ if (stereo_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(stereo_image,DirectClass,exception) == MagickFalse)
+ {
+ stereo_image=DestroyImage(stereo_image);
+ return((Image *) NULL);
+ }
+ (void) SetImageColorspace(stereo_image,sRGBColorspace,exception);
+ /*
+ Copy left image to red channel and right image to blue channel.
+ */
+ status=MagickTrue;
+ for (y=0; y < (ssize_t) stereo_image->rows; y++)
+ {
+ register const Quantum
+ *magick_restrict p,
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ register Quantum
+ *magick_restrict r;
+
+ p=GetVirtualPixels(left_image,-x_offset,y-y_offset,image->columns,1,
+ exception);
+ q=GetVirtualPixels(right_image,0,y,right_image->columns,1,exception);
+ r=QueueAuthenticPixels(stereo_image,0,y,stereo_image->columns,1,exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL) ||
+ (r == (Quantum *) NULL))
+ break;
+ for (x=0; x < (ssize_t) stereo_image->columns; x++)
+ {
+ SetPixelRed(image,GetPixelRed(left_image,p),r);
+ SetPixelGreen(image,GetPixelGreen(right_image,q),r);
+ SetPixelBlue(image,GetPixelBlue(right_image,q),r);
+ if ((GetPixelAlphaTraits(stereo_image) & CopyPixelTrait) != 0)
+ SetPixelAlpha(image,(GetPixelAlpha(left_image,p)+
+ GetPixelAlpha(right_image,q))/2,r);
+ p+=GetPixelChannels(left_image);
+ q+=GetPixelChannels(right_image);
+ r+=GetPixelChannels(stereo_image);
+ }
+ if (SyncAuthenticPixels(stereo_image,exception) == MagickFalse)
+ break;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+ proceed=SetImageProgress(image,StereoImageTag,(MagickOffsetType) y,
+ stereo_image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ if (status == MagickFalse)
+ stereo_image=DestroyImage(stereo_image);
+ return(stereo_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% S w i r l I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% SwirlImage() swirls the pixels about the center of the image, where
+% degrees indicates the sweep of the arc through which each pixel is moved.
+% You get a more dramatic effect as the degrees move from 1 to 360.
+%
+% The format of the SwirlImage method is:
+%
+% Image *SwirlImage(const Image *image,double degrees,
+% const PixelInterpolateMethod method,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o degrees: Define the tightness of the swirling effect.
+%
+% o method: the pixel interpolation method.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *SwirlImage(const Image *image,double degrees,
+ const PixelInterpolateMethod method,ExceptionInfo *exception)
+{
+#define SwirlImageTag "Swirl/Image"
+
+ CacheView
+ *canvas_view,
+ *interpolate_view,
+ *swirl_view;
+
+ double
+ radius;
+
+ Image
+ *canvas,
+ *swirl_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ PointInfo
+ center,
+ scale;
+
+ ssize_t
+ y;
+
+ /*
+ Initialize swirl 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);
+ canvas=CloneImage(image,0,0,MagickTrue,exception);
+ if (canvas == (Image *) NULL)
+ return((Image *) NULL);
+ if ((canvas->alpha_trait == UndefinedPixelTrait) &&
+ (canvas->background_color.alpha != OpaqueAlpha))
+ (void) SetImageAlphaChannel(canvas,OpaqueAlphaChannel,exception);
+ swirl_image=CloneImage(canvas,canvas->columns,canvas->rows,MagickTrue,
+ exception);
+ if (swirl_image == (Image *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ if (SetImageStorageClass(swirl_image,DirectClass,exception) == MagickFalse)
+ {
+ canvas=DestroyImage(canvas);
+ swirl_image=DestroyImage(swirl_image);
+ return((Image *) NULL);
+ }
+ /*
+ Compute scaling factor.
+ */
+ center.x=(double) canvas->columns/2.0;
+ center.y=(double) canvas->rows/2.0;
+ radius=MagickMax(center.x,center.y);
+ scale.x=1.0;
+ scale.y=1.0;
+ if (canvas->columns > canvas->rows)
+ scale.y=(double) canvas->columns/(double) canvas->rows;
+ else
+ if (canvas->columns < canvas->rows)
+ scale.x=(double) canvas->rows/(double) canvas->columns;
+ degrees=(double) DegreesToRadians(degrees);
+ /*
+ Swirl image.
+ */
+ status=MagickTrue;
+ progress=0;
+ canvas_view=AcquireVirtualCacheView(canvas,exception);
+ interpolate_view=AcquireVirtualCacheView(image,exception);
+ swirl_view=AcquireAuthenticCacheView(swirl_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(canvas,swirl_image,canvas->rows,1)
+#endif
+ for (y=0; y < (ssize_t) canvas->rows; y++)
+ {
+ double
+ distance;
+
+ PointInfo
+ delta;
+
+ register const Quantum
+ *magick_restrict p;
+
+ register ssize_t
+ x;
+
+ register Quantum
+ *magick_restrict q;
+
+ if (status == MagickFalse)
+ continue;
+ p=GetCacheViewVirtualPixels(canvas_view,0,y,canvas->columns,1,exception);
+ q=QueueCacheViewAuthenticPixels(swirl_view,0,y,swirl_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ delta.y=scale.y*(double) (y-center.y);
+ for (x=0; x < (ssize_t) canvas->columns; x++)
+ {
+ /*
+ Determine if the pixel is within an ellipse.
+ */
+ delta.x=scale.x*(double) (x-center.x);
+ distance=delta.x*delta.x+delta.y*delta.y;
+ if ((distance >= (radius*radius)) ||
+ (GetPixelWriteMask(image,p) > (QuantumRange/2)))
+ {
+ register ssize_t
+ i;
+
+ for (i=0; i < (ssize_t) GetPixelChannels(canvas); i++)
+ {
+ PixelChannel channel = GetPixelChannelChannel(canvas,i);
+ PixelTrait traits = GetPixelChannelTraits(canvas,channel);
+ PixelTrait swirl_traits = GetPixelChannelTraits(swirl_image,
+ channel);
+ if ((traits == UndefinedPixelTrait) ||
+ (swirl_traits == UndefinedPixelTrait))
+ continue;
+ SetPixelChannel(swirl_image,channel,p[i],q);
+ }
+ }
+ else
+ {
+ double
+ cosine,
+ factor,
+ sine;
+
+ /*
+ Swirl the pixel.
+ */
+ factor=1.0-sqrt((double) distance)/radius;
+ sine=sin((double) (degrees*factor*factor));
+ cosine=cos((double) (degrees*factor*factor));
+ status=InterpolatePixelChannels(canvas,interpolate_view,swirl_image,
+ method,((cosine*delta.x-sine*delta.y)/scale.x+center.x),(double)
+ ((sine*delta.x+cosine*delta.y)/scale.y+center.y),q,exception);
+ if (status == MagickFalse)
+ break;
+ }
+ p+=GetPixelChannels(canvas);
+ q+=GetPixelChannels(swirl_image);
+ }
+ if (SyncCacheViewAuthenticPixels(swirl_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (canvas->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_SwirlImage)
+#endif
+ proceed=SetImageProgress(canvas,SwirlImageTag,progress++,canvas->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ swirl_view=DestroyCacheView(swirl_view);
+ interpolate_view=DestroyCacheView(interpolate_view);
+ canvas_view=DestroyCacheView(canvas_view);
+ canvas=DestroyImage(canvas);
+ if (status == MagickFalse)
+ swirl_image=DestroyImage(swirl_image);
+ return(swirl_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% T i n t I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% TintImage() applies a color vector to each pixel in the image. The length
+% of the vector is 0 for black and white and at its maximum for the midtones.
+% The vector weighting function is f(x)=(1-(4.0*((x-0.5)*(x-0.5))))
+%
+% The format of the TintImage method is:
+%
+% Image *TintImage(const Image *image,const char *blend,
+% const PixelInfo *tint,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o blend: A color value used for tinting.
+%
+% o tint: A color value used for tinting.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *TintImage(const Image *image,const char *blend,
+ const PixelInfo *tint,ExceptionInfo *exception)
+{
+#define TintImageTag "Tint/Image"
+
+ CacheView
+ *image_view,
+ *tint_view;
+
+ double
+ intensity;
+
+ GeometryInfo
+ geometry_info;
+
+ Image
+ *tint_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ PixelInfo
+ color_vector;
+
+ MagickStatusType
+ flags;
+
+ ssize_t
+ y;
+
+ /*
+ Allocate tint image.
+ */
+ 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);
+ tint_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (tint_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(tint_image,DirectClass,exception) == MagickFalse)
+ {
+ tint_image=DestroyImage(tint_image);
+ return((Image *) NULL);
+ }
+ if ((IsGrayColorspace(image->colorspace) != MagickFalse) &&
+ (IsPixelInfoGray(tint) == MagickFalse))
+ (void) SetImageColorspace(tint_image,sRGBColorspace,exception);
+ if (blend == (const char *) NULL)
+ return(tint_image);
+ /*
+ Determine RGB values of the color.
+ */
+ GetPixelInfo(image,&color_vector);
+ flags=ParseGeometry(blend,&geometry_info);
+ color_vector.red=geometry_info.rho;
+ color_vector.green=geometry_info.rho;
+ color_vector.blue=geometry_info.rho;
+ color_vector.alpha=(MagickRealType) OpaqueAlpha;
+ if ((flags & SigmaValue) != 0)
+ color_vector.green=geometry_info.sigma;
+ if ((flags & XiValue) != 0)
+ color_vector.blue=geometry_info.xi;
+ if ((flags & PsiValue) != 0)
+ color_vector.alpha=geometry_info.psi;
+ if (image->colorspace == CMYKColorspace)
+ {
+ color_vector.black=geometry_info.rho;
+ if ((flags & PsiValue) != 0)
+ color_vector.black=geometry_info.psi;
+ if ((flags & ChiValue) != 0)
+ color_vector.alpha=geometry_info.chi;
+ }
+ intensity=(double) GetPixelInfoIntensity((const Image *) NULL,tint);
+ color_vector.red=(double) (color_vector.red*tint->red/100.0-intensity);
+ color_vector.green=(double) (color_vector.green*tint->green/100.0-intensity);
+ color_vector.blue=(double) (color_vector.blue*tint->blue/100.0-intensity);
+ color_vector.black=(double) (color_vector.black*tint->black/100.0-intensity);
+ color_vector.alpha=(double) (color_vector.alpha*tint->alpha/100.0-intensity);
+ /*
+ Tint image.
+ */
+ status=MagickTrue;
+ progress=0;
+ image_view=AcquireVirtualCacheView(image,exception);
+ tint_view=AcquireAuthenticCacheView(tint_image,exception);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(image,tint_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,y,image->columns,1,exception);
+ q=QueueCacheViewAuthenticPixels(tint_view,0,y,tint_image->columns,1,
+ exception);
+ if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ PixelInfo
+ pixel;
+
+ double
+ weight;
+
+ GetPixelInfo(image,&pixel);
+ weight=QuantumScale*GetPixelRed(image,p)-0.5;
+ pixel.red=(MagickRealType) GetPixelRed(image,p)+color_vector.red*
+ (1.0-(4.0*(weight*weight)));
+ weight=QuantumScale*GetPixelGreen(image,p)-0.5;
+ pixel.green=(MagickRealType) GetPixelGreen(image,p)+color_vector.green*
+ (1.0-(4.0*(weight*weight)));
+ weight=QuantumScale*GetPixelBlue(image,p)-0.5;
+ pixel.blue=(MagickRealType) GetPixelBlue(image,p)+color_vector.blue*
+ (1.0-(4.0*(weight*weight)));
+ weight=QuantumScale*GetPixelBlack(image,p)-0.5;
+ pixel.black=(MagickRealType) GetPixelBlack(image,p)+color_vector.black*
+ (1.0-(4.0*(weight*weight)));
+ pixel.alpha=(MagickRealType) GetPixelAlpha(image,p);
+ SetPixelViaPixelInfo(tint_image,&pixel,q);
+ p+=GetPixelChannels(image);
+ q+=GetPixelChannels(tint_image);
+ }
+ if (SyncCacheViewAuthenticPixels(tint_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_TintImage)
+#endif
+ proceed=SetImageProgress(image,TintImageTag,progress++,image->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ tint_view=DestroyCacheView(tint_view);
+ image_view=DestroyCacheView(image_view);
+ if (status == MagickFalse)
+ tint_image=DestroyImage(tint_image);
+ return(tint_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% V i g n e t t e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% VignetteImage() softens the edges of the image in vignette style.
+%
+% The format of the VignetteImage method is:
+%
+% Image *VignetteImage(const Image *image,const double radius,
+% const double sigma,const ssize_t x,const ssize_t y,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o radius: the radius of the pixel neighborhood.
+%
+% o sigma: the standard deviation of the Gaussian, in pixels.
+%
+% o x, y: Define the x and y ellipse offset.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *VignetteImage(const Image *image,const double radius,
+ const double sigma,const ssize_t x,const ssize_t y,ExceptionInfo *exception)
+{
+ char
+ ellipse[MagickPathExtent];
+
+ DrawInfo
+ *draw_info;
+
+ Image
+ *canvas,
+ *blur_image,
+ *oval_image,
+ *vignette_image;
+
+ assert(image != (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);
+ canvas=CloneImage(image,0,0,MagickTrue,exception);
+ if (canvas == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(canvas,DirectClass,exception) == MagickFalse)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ canvas->alpha_trait=BlendPixelTrait;
+ oval_image=CloneImage(canvas,canvas->columns,canvas->rows,MagickTrue,
+ exception);
+ if (oval_image == (Image *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ (void) QueryColorCompliance("#000000",AllCompliance,
+ &oval_image->background_color,exception);
+ (void) SetImageBackgroundColor(oval_image,exception);
+ draw_info=CloneDrawInfo((const ImageInfo *) NULL,(const DrawInfo *) NULL);
+ (void) QueryColorCompliance("#ffffff",AllCompliance,&draw_info->fill,
+ exception);
+ (void) QueryColorCompliance("#ffffff",AllCompliance,&draw_info->stroke,
+ exception);
+ (void) FormatLocaleString(ellipse,MagickPathExtent,"ellipse %g,%g,%g,%g,"
+ "0.0,360.0",image->columns/2.0,image->rows/2.0,image->columns/2.0-x,
+ image->rows/2.0-y);
+ draw_info->primitive=AcquireString(ellipse);
+ (void) DrawImage(oval_image,draw_info,exception);
+ draw_info=DestroyDrawInfo(draw_info);
+ blur_image=BlurImage(oval_image,radius,sigma,exception);
+ oval_image=DestroyImage(oval_image);
+ if (blur_image == (Image *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ blur_image->alpha_trait=UndefinedPixelTrait;
+ (void) CompositeImage(canvas,blur_image,IntensityCompositeOp,MagickTrue,
+ 0,0,exception);
+ blur_image=DestroyImage(blur_image);
+ vignette_image=MergeImageLayers(canvas,FlattenLayer,exception);
+ canvas=DestroyImage(canvas);
+ if (vignette_image != (Image *) NULL)
+ (void) TransformImageColorspace(vignette_image,image->colorspace,exception);
+ return(vignette_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% W a v e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% WaveImage() creates a "ripple" effect in the image by shifting the pixels
+% vertically along a sine wave whose amplitude and wavelength is specified
+% by the given parameters.
+%
+% The format of the WaveImage method is:
+%
+% Image *WaveImage(const Image *image,const double amplitude,
+% const double wave_length,const PixelInterpolateMethod method,
+% ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o amplitude, wave_length: Define the amplitude and wave length of the
+% sine wave.
+%
+% o interpolate: the pixel interpolation method.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+MagickExport Image *WaveImage(const Image *image,const double amplitude,
+ const double wave_length,const PixelInterpolateMethod method,
+ ExceptionInfo *exception)
+{
+#define WaveImageTag "Wave/Image"
+
+ CacheView
+ *canvas_view,
+ *wave_view;
+
+ Image
+ *canvas,
+ *wave_image;
+
+ MagickBooleanType
+ status;
+
+ MagickOffsetType
+ progress;
+
+ double
+ *sine_map;
+
+ register ssize_t
+ i;
+
+ ssize_t
+ y;
+
+ /*
+ Initialize wave image attributes.
+ */
+ assert(image != (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);
+ canvas=CloneImage(image,0,0,MagickTrue,exception);
+ if (canvas == (Image *) NULL)
+ return((Image *) NULL);
+ if ((canvas->alpha_trait == UndefinedPixelTrait) &&
+ (canvas->background_color.alpha != OpaqueAlpha))
+ (void) SetImageAlpha(canvas,OpaqueAlpha,exception);
+ wave_image=CloneImage(canvas,canvas->columns,(size_t) (canvas->rows+2.0*
+ fabs(amplitude)),MagickTrue,exception);
+ if (wave_image == (Image *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ return((Image *) NULL);
+ }
+ if (SetImageStorageClass(wave_image,DirectClass,exception) == MagickFalse)
+ {
+ canvas=DestroyImage(canvas);
+ wave_image=DestroyImage(wave_image);
+ return((Image *) NULL);
+ }
+ /*
+ Allocate sine map.
+ */
+ sine_map=(double *) AcquireQuantumMemory((size_t) wave_image->columns,
+ sizeof(*sine_map));
+ if (sine_map == (double *) NULL)
+ {
+ canvas=DestroyImage(canvas);
+ wave_image=DestroyImage(wave_image);
+ ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
+ }
+ for (i=0; i < (ssize_t) wave_image->columns; i++)
+ sine_map[i]=fabs(amplitude)+amplitude*sin((double) ((2.0*MagickPI*i)/
+ wave_length));
+ /*
+ Wave image.
+ */
+ status=MagickTrue;
+ progress=0;
+ canvas_view=AcquireVirtualCacheView(canvas,exception);
+ wave_view=AcquireAuthenticCacheView(wave_image,exception);
+ (void) SetCacheViewVirtualPixelMethod(canvas_view,
+ BackgroundVirtualPixelMethod);
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static) shared(progress,status) \
+ magick_number_threads(canvas,wave_image,wave_image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) wave_image->rows; y++)
+ {
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ if (status == MagickFalse)
+ continue;
+ q=QueueCacheViewAuthenticPixels(wave_view,0,y,wave_image->columns,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ continue;
+ }
+ for (x=0; x < (ssize_t) wave_image->columns; x++)
+ {
+ status=InterpolatePixelChannels(canvas,canvas_view,wave_image,method,
+ (double) x,(double) (y-sine_map[x]),q,exception);
+ if (status == MagickFalse)
+ break;
+ q+=GetPixelChannels(wave_image);
+ }
+ if (SyncCacheViewAuthenticPixels(wave_view,exception) == MagickFalse)
+ status=MagickFalse;
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp critical (MagickCore_WaveImage)
+#endif
+ proceed=SetImageProgress(canvas,WaveImageTag,progress++,canvas->rows);
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ wave_view=DestroyCacheView(wave_view);
+ canvas_view=DestroyCacheView(canvas_view);
+ canvas=DestroyImage(canvas);
+ sine_map=(double *) RelinquishMagickMemory(sine_map);
+ if (status == MagickFalse)
+ wave_image=DestroyImage(wave_image);
+ return(wave_image);
+}
+\f
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% W a v e l e t D e n o i s e I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% WaveletDenoiseImage() removes noise from the image using a wavelet
+% transform. The wavelet transform is a fast hierarchical scheme for
+% processing an image using a set of consecutive lowpass and high_pass filters,
+% followed by a decimation. This results in a decomposition into different
+% scales which can be regarded as different “frequency bands”, determined by
+% the mother wavelet. Adapted from dcraw.c by David Coffin.
+%
+% The format of the WaveletDenoiseImage method is:
+%
+% Image *WaveletDenoiseImage(const Image *image,const double threshold,
+% const double softness,ExceptionInfo *exception)
+%
+% A description of each parameter follows:
+%
+% o image: the image.
+%
+% o threshold: set the threshold for smoothing.
+%
+% o softness: attenuate the smoothing threshold.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+
+static inline void HatTransform(const float *magick_restrict pixels,
+ const size_t stride,const size_t extent,const size_t scale,float *kernel)
+{
+ const float
+ *magick_restrict p,
+ *magick_restrict q,
+ *magick_restrict r;
+
+ register ssize_t
+ i;
+
+ p=pixels;
+ q=pixels+scale*stride;
+ r=pixels+scale*stride;
+ for (i=0; i < (ssize_t) scale; i++)
+ {
+ kernel[i]=0.25f*(*p+(*p)+(*q)+(*r));
+ p+=stride;
+ q-=stride;
+ r+=stride;
+ }
+ for ( ; i < (ssize_t) (extent-scale); i++)
+ {
+ kernel[i]=0.25f*(2.0f*(*p)+*(p-scale*stride)+*(p+scale*stride));
+ p+=stride;
+ }
+ q=p-scale*stride;
+ r=pixels+stride*(extent-2);
+ for ( ; i < (ssize_t) extent; i++)
+ {
+ kernel[i]=0.25f*(*p+(*p)+(*q)+(*r));
+ p+=stride;
+ q+=stride;
+ r-=stride;
+ }
+}
+
+MagickExport Image *WaveletDenoiseImage(const Image *image,
+ const double threshold,const double softness,ExceptionInfo *exception)
+{
+ CacheView
+ *image_view,
+ *noise_view;
+
+ float
+ *kernel,
+ *pixels;
+
+ Image
+ *noise_image;
+
+ MagickBooleanType
+ status;
+
+ MagickSizeType
+ number_pixels;
+
+ MemoryInfo
+ *pixels_info;
+
+ ssize_t
+ channel;
+
+ static const float
+ noise_levels[] = { 0.8002f, 0.2735f, 0.1202f, 0.0585f, 0.0291f, 0.0152f,
+ 0.0080f, 0.0044f };
+
+ /*
+ Initialize noise 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);
+#if defined(MAGICKCORE_OPENCL_SUPPORT)
+ noise_image=AccelerateWaveletDenoiseImage(image,threshold,exception);
+ if (noise_image != (Image *) NULL)
+ return(noise_image);
+#endif
+ noise_image=CloneImage(image,0,0,MagickTrue,exception);
+ if (noise_image == (Image *) NULL)
+ return((Image *) NULL);
+ if (SetImageStorageClass(noise_image,DirectClass,exception) == MagickFalse)
+ {
+ noise_image=DestroyImage(noise_image);
+ return((Image *) NULL);
+ }
+ if (AcquireMagickResource(WidthResource,4*image->columns) == MagickFalse)
+ ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
+ pixels_info=AcquireVirtualMemory(3*image->columns,image->rows*
+ sizeof(*pixels));
+ kernel=(float *) AcquireQuantumMemory(MagickMax(image->rows,image->columns)+1,
+ GetOpenMPMaximumThreads()*sizeof(*kernel));
+ if ((pixels_info == (MemoryInfo *) NULL) || (kernel == (float *) NULL))
+ {
+ if (kernel != (float *) NULL)
+ kernel=(float *) RelinquishMagickMemory(kernel);
+ if (pixels_info != (MemoryInfo *) NULL)
+ pixels_info=RelinquishVirtualMemory(pixels_info);
+ ThrowImageException(ResourceLimitError,"MemoryAllocationFailed");
+ }
+ pixels=(float *) GetVirtualMemoryBlob(pixels_info);
+ status=MagickTrue;
+ number_pixels=(MagickSizeType) image->columns*image->rows;
+ image_view=AcquireAuthenticCacheView(image,exception);
+ noise_view=AcquireAuthenticCacheView(noise_image,exception);
+ for (channel=0; channel < (ssize_t) GetPixelChannels(image); channel++)
+ {
+ register ssize_t
+ i;
+
+ size_t
+ high_pass,
+ low_pass;
+
+ ssize_t
+ level,
+ y;
+
+ PixelChannel
+ pixel_channel;
+
+ PixelTrait
+ traits;
+
+ if (status == MagickFalse)
+ continue;
+ traits=GetPixelChannelTraits(image,(PixelChannel) channel);
+ if (traits == UndefinedPixelTrait)
+ continue;
+ pixel_channel=GetPixelChannelChannel(image,channel);
+ if ((pixel_channel != RedPixelChannel) &&
+ (pixel_channel != GreenPixelChannel) &&
+ (pixel_channel != BluePixelChannel))
+ continue;
+ /*
+ Copy channel from image to wavelet pixel array.
+ */
+ i=0;
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ register const Quantum
+ *magick_restrict p;
+
+ ssize_t
+ x;
+
+ p=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception);
+ if (p == (const Quantum *) NULL)
+ {
+ status=MagickFalse;
+ break;
+ }
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ pixels[i++]=(float) p[channel];
+ p+=GetPixelChannels(image);
+ }
+ }
+ /*
+ Low pass filter outputs are called approximation kernel & high pass
+ filters are referred to as detail kernel. The detail kernel
+ have high values in the noisy parts of the signal.
+ */
+ high_pass=0;
+ for (level=0; level < 5; level++)
+ {
+ double
+ magnitude;
+
+ ssize_t
+ x,
+ y;
+
+ low_pass=(size_t) (number_pixels*((level & 0x01)+1));
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static,1) \
+ magick_number_threads(image,image,image->rows,1)
+#endif
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ const int
+ id = GetOpenMPThreadId();
+
+ register float
+ *magick_restrict p,
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ p=kernel+id*image->columns;
+ q=pixels+y*image->columns;
+ HatTransform(q+high_pass,1,image->columns,(size_t) (1UL << level),p);
+ q+=low_pass;
+ for (x=0; x < (ssize_t) image->columns; x++)
+ *q++=(*p++);
+ }
+#if defined(MAGICKCORE_OPENMP_SUPPORT)
+ #pragma omp parallel for schedule(static,1) \
+ magick_number_threads(image,image,image->columns,1)
+#endif
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ const int
+ id = GetOpenMPThreadId();
+
+ register float
+ *magick_restrict p,
+ *magick_restrict q;
+
+ register ssize_t
+ y;
+
+ p=kernel+id*image->rows;
+ q=pixels+x+low_pass;
+ HatTransform(q,image->columns,image->rows,(size_t) (1UL << level),p);
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ *q=(*p++);
+ q+=image->columns;
+ }
+ }
+ /*
+ To threshold, each coefficient is compared to a threshold value and
+ attenuated / shrunk by some factor.
+ */
+ magnitude=threshold*noise_levels[level];
+ for (i=0; i < (ssize_t) number_pixels; ++i)
+ {
+ pixels[high_pass+i]-=pixels[low_pass+i];
+ if (pixels[high_pass+i] < -magnitude)
+ pixels[high_pass+i]+=magnitude-softness*magnitude;
+ else
+ if (pixels[high_pass+i] > magnitude)
+ pixels[high_pass+i]-=magnitude-softness*magnitude;
+ else
+ pixels[high_pass+i]*=softness;
+ if (high_pass != 0)
+ pixels[i]+=pixels[high_pass+i];
+ }
+ high_pass=low_pass;
+ }
+ /*
+ Reconstruct image from the thresholded wavelet kernel.
+ */
+ i=0;
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ MagickBooleanType
+ sync;
+
+ register Quantum
+ *magick_restrict q;
+
+ register ssize_t
+ x;
+
+ ssize_t
+ offset;
+
+ q=GetCacheViewAuthenticPixels(noise_view,0,y,noise_image->columns,1,
+ exception);
+ if (q == (Quantum *) NULL)
+ {
+ status=MagickFalse;
+ break;
+ }
+ offset=GetPixelChannelOffset(noise_image,pixel_channel);
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ MagickRealType
+ pixel;
+
+ pixel=(MagickRealType) pixels[i]+pixels[low_pass+i];
+ q[offset]=ClampToQuantum(pixel);
+ i++;
+ q+=GetPixelChannels(noise_image);
+ }
+ sync=SyncCacheViewAuthenticPixels(noise_view,exception);
+ if (sync == MagickFalse)
+ status=MagickFalse;
+ }
+ if (image->progress_monitor != (MagickProgressMonitor) NULL)
+ {
+ MagickBooleanType
+ proceed;
+
+ proceed=SetImageProgress(image,AddNoiseImageTag,(MagickOffsetType)
+ channel,GetPixelChannels(image));
+ if (proceed == MagickFalse)
+ status=MagickFalse;
+ }
+ }
+ noise_view=DestroyCacheView(noise_view);
+ image_view=DestroyCacheView(image_view);
+ kernel=(float *) RelinquishMagickMemory(kernel);
+ pixels_info=RelinquishVirtualMemory(pixels_info);
+ if (status == MagickFalse)
+ noise_image=DestroyImage(noise_image);
+ return(noise_image);
+}
projects / imagemagick / commitdiff