/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % CCCC OOO M M PPPP OOO SSSSS IIIII TTTTT EEEEE % % C O O MM MM P P O O SS I T E % % C O O M M M PPPP O O SSS I T EEE % % C O O M M P O O SS I T E % % CCCC OOO M M P OOO SSSSS IIIII T EEEEE % % % % % % MagickCore Image Composite Methods % % % % Software Design % % Cristy % % July 1992 % % % % % % Copyright @ 1999 ImageMagick Studio LLC, a non-profit organization % % dedicated to making software imaging solutions freely available. % % % % You may not use this file except in compliance with the License. You may % % obtain a copy of the License at % % % % https://imagemagick.org/script/license.php % % % % Unless required by applicable law or agreed to in writing, software % % distributed under the License is distributed on an "AS IS" BASIS, % % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % % See the License for the specific language governing permissions and % % limitations under the License. % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % */ /* Include declarations. */ #include "MagickCore/studio.h" #include "MagickCore/artifact.h" #include "MagickCore/cache.h" #include "MagickCore/cache-private.h" #include "MagickCore/cache-view.h" #include "MagickCore/channel.h" #include "MagickCore/client.h" #include "MagickCore/color.h" #include "MagickCore/color-private.h" #include "MagickCore/colorspace.h" #include "MagickCore/colorspace-private.h" #include "MagickCore/composite.h" #include "MagickCore/composite-private.h" #include "MagickCore/constitute.h" #include "MagickCore/draw.h" #include "MagickCore/exception-private.h" #include "MagickCore/fx.h" #include "MagickCore/gem.h" #include "MagickCore/geometry.h" #include "MagickCore/image.h" #include "MagickCore/image-private.h" #include "MagickCore/list.h" #include "MagickCore/log.h" #include "MagickCore/memory_.h" #include "MagickCore/monitor.h" #include "MagickCore/monitor-private.h" #include "MagickCore/morphology.h" #include "MagickCore/option.h" #include "MagickCore/pixel-accessor.h" #include "MagickCore/property.h" #include "MagickCore/quantum.h" #include "MagickCore/resample.h" #include "MagickCore/resource_.h" #include "MagickCore/string_.h" #include "MagickCore/thread-private.h" #include "MagickCore/threshold.h" #include "MagickCore/token.h" #include "MagickCore/transform.h" #include "MagickCore/utility.h" #include "MagickCore/utility-private.h" #include "MagickCore/version.h" /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % C o m p o s i t e I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % CompositeImage() returns the second image composited onto the first % at the specified offset, using the specified composite method. % % The format of the CompositeImage method is: % % MagickBooleanType CompositeImage(Image *image, % const Image *source_image,const CompositeOperator compose, % const MagickBooleanType clip_to_self,const ssize_t x_offset, % const ssize_t y_offset,ExceptionInfo *exception) % % A description of each parameter follows: % % o image: the canvas image, modified by he composition % % o source_image: the source image. % % o compose: This operator affects how the composite is applied to % the image. The operators and how they are utilized are listed here % http://www.w3.org/TR/SVG12/#compositing. % % o clip_to_self: set to MagickTrue to limit composition to area composed. % % o x_offset: the column offset of the composited image. % % o y_offset: the row offset of the composited image. % % Extra Controls from Image meta-data in 'image' (artifacts) % % o "compose:args" % A string containing extra numerical arguments for specific compose % methods, generally expressed as a 'geometry' or a comma separated list % of numbers. % % Compose methods needing such arguments include "BlendCompositeOp" and % "DisplaceCompositeOp". % % o exception: return any errors or warnings in this structure. % */ /* Composition based on the SVG specification: A Composition is defined by... Color Function : f(Sc,Dc) where Sc and Dc are the normalized colors Blending areas : X = 1 for area of overlap, ie: f(Sc,Dc) Y = 1 for source preserved Z = 1 for canvas preserved Conversion to transparency (then optimized) Dca' = f(Sc, Dc)*Sa*Da + Y*Sca*(1-Da) + Z*Dca*(1-Sa) Da' = X*Sa*Da + Y*Sa*(1-Da) + Z*Da*(1-Sa) Where... Sca = Sc*Sa normalized Source color divided by Source alpha Dca = Dc*Da normalized Dest color divided by Dest alpha Dc' = Dca'/Da' the desired color value for this channel. Da' in in the follow formula as 'gamma' The resulting alpha value. Most functions use a blending mode of over (X=1,Y=1,Z=1) this results in the following optimizations... gamma = Sa+Da-Sa*Da; gamma = 1 - QuantumScale*alpha * QuantumScale*beta; opacity = QuantumScale*alpha*beta; // over blend, optimized 1-Gamma The above SVG definitions also define that Mathematical Composition methods should use a 'Over' blending mode for Alpha Channel. It however was not applied for composition modes of 'Plus', 'Minus', the modulus versions of 'Add' and 'Subtract'. Mathematical operator changes to be applied from IM v6.7... 1) Modulus modes 'Add' and 'Subtract' are obsoleted and renamed 'ModulusAdd' and 'ModulusSubtract' for clarity. 2) All mathematical compositions work as per the SVG specification with regard to blending. This now includes 'ModulusAdd' and 'ModulusSubtract'. 3) When the special channel flag 'sync' (synchronize channel updates) is turned off (enabled by default) then mathematical compositions are only performed on the channels specified, and are applied independently of each other. In other words the mathematics is performed as 'pure' mathematical operations, rather than as image operations. */ static Image *BlendConvolveImage(const Image *image,const char *kernel, ExceptionInfo *exception) { Image *clone_image, *convolve_image; KernelInfo *kernel_info; /* Convolve image with a kernel. */ kernel_info=AcquireKernelInfo(kernel,exception); if (kernel_info == (KernelInfo *) NULL) return((Image *) NULL); clone_image=CloneImage(image,0,0,MagickTrue,exception); if (clone_image == (Image *) NULL) { kernel_info=DestroyKernelInfo(kernel_info); return((Image *) NULL); } (void) SetImageAlphaChannel(clone_image,OffAlphaChannel,exception); convolve_image=ConvolveImage(clone_image,kernel_info,exception); kernel_info=DestroyKernelInfo(kernel_info); clone_image=DestroyImage(clone_image); return(convolve_image); } static Image *BlendMagnitudeImage(const Image *dx_image,const Image *dy_image, ExceptionInfo *exception) { CacheView *dx_view, *dy_view, *magnitude_view; Image *magnitude_image; MagickBooleanType status = MagickTrue; ssize_t y; /* Generate the magnitude between two images. */ magnitude_image=CloneImage(dx_image,0,0,MagickTrue,exception); if (magnitude_image == (Image *) NULL) return(magnitude_image); dx_view=AcquireVirtualCacheView(dx_image,exception); dy_view=AcquireVirtualCacheView(dy_image,exception); magnitude_view=AcquireAuthenticCacheView(magnitude_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(dx_image,magnitude_image,dx_image->rows,1) #endif for (y=0; y < (ssize_t) dx_image->rows; y++) { const Quantum *magick_restrict p, *magick_restrict q; Quantum *magick_restrict r; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(dx_view,0,y,dx_image->columns,1,exception); q=GetCacheViewVirtualPixels(dy_view,0,y,dx_image->columns,1,exception); r=GetCacheViewAuthenticPixels(magnitude_view,0,y,dx_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (const Quantum *) NULL) || (r == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) dx_image->columns; x++) { ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(dx_image); i++) { PixelChannel channel = GetPixelChannelChannel(dx_image,i); PixelTrait traits = GetPixelChannelTraits(dx_image,channel); PixelTrait dy_traits = GetPixelChannelTraits(dy_image,channel); if ((traits == UndefinedPixelTrait) || (dy_traits == UndefinedPixelTrait) || ((dy_traits & UpdatePixelTrait) == 0)) continue; r[i]=ClampToQuantum(hypot((double) p[i],(double) GetPixelChannel(dy_image,channel,q))); } p+=GetPixelChannels(dx_image); q+=GetPixelChannels(dy_image); r+=GetPixelChannels(magnitude_image); } if (SyncCacheViewAuthenticPixels(magnitude_view,exception) == MagickFalse) status=MagickFalse; } magnitude_view=DestroyCacheView(magnitude_view); dy_view=DestroyCacheView(dy_view); dx_view=DestroyCacheView(dx_view); if (status == MagickFalse) magnitude_image=DestroyImage(magnitude_image); return(magnitude_image); } static Image *BlendMaxMagnitudeImage(const Image *alpha_image, const Image *beta_image,const Image *dx_image,const Image *dy_image, ExceptionInfo *exception) { CacheView *alpha_view, *beta_view, *dx_view, *dy_view, *magnitude_view; Image *magnitude_image; MagickBooleanType status = MagickTrue; ssize_t y; /* Select the larger of two magnitudes. */ magnitude_image=CloneImage(alpha_image,0,0,MagickTrue,exception); if (magnitude_image == (Image *) NULL) return(magnitude_image); alpha_view=AcquireVirtualCacheView(alpha_image,exception); beta_view=AcquireVirtualCacheView(beta_image,exception); dx_view=AcquireVirtualCacheView(dx_image,exception); dy_view=AcquireVirtualCacheView(dy_image,exception); magnitude_view=AcquireAuthenticCacheView(magnitude_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(alpha_image,magnitude_image,alpha_image->rows,1) #endif for (y=0; y < (ssize_t) alpha_image->rows; y++) { const Quantum *magick_restrict p, *magick_restrict q, *magick_restrict r, *magick_restrict s; Quantum *magick_restrict t; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(alpha_view,0,y,alpha_image->columns,1, exception); q=GetCacheViewVirtualPixels(beta_view,0,y,alpha_image->columns,1,exception); r=GetCacheViewVirtualPixels(dx_view,0,y,alpha_image->columns,1,exception); s=GetCacheViewVirtualPixels(dy_view,0,y,alpha_image->columns,1,exception); t=GetCacheViewAuthenticPixels(magnitude_view,0,y,alpha_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (const Quantum *) NULL) || (r == (const Quantum *) NULL) || (s == (const Quantum *) NULL) || (t == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) alpha_image->columns; x++) { ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(alpha_image); i++) { PixelChannel channel = GetPixelChannelChannel(alpha_image,i); PixelTrait traits = GetPixelChannelTraits(alpha_image,channel); PixelTrait beta_traits = GetPixelChannelTraits(beta_image,channel); if ((traits == UndefinedPixelTrait) || (beta_traits == UndefinedPixelTrait) || ((beta_traits & UpdatePixelTrait) == 0)) continue; if (p[i] > GetPixelChannel(beta_image,channel,q)) t[i]=GetPixelChannel(dx_image,channel,r); else t[i]=GetPixelChannel(dy_image,channel,s); } p+=GetPixelChannels(alpha_image); q+=GetPixelChannels(beta_image); r+=GetPixelChannels(dx_image); s+=GetPixelChannels(dy_image); t+=GetPixelChannels(magnitude_image); } if (SyncCacheViewAuthenticPixels(magnitude_view,exception) == MagickFalse) status=MagickFalse; } magnitude_view=DestroyCacheView(magnitude_view); dy_view=DestroyCacheView(dy_view); dx_view=DestroyCacheView(dx_view); beta_view=DestroyCacheView(beta_view); alpha_view=DestroyCacheView(alpha_view); if (status == MagickFalse) magnitude_image=DestroyImage(magnitude_image); return(magnitude_image); } static Image *BlendSumImage(const Image *alpha_image,const Image *beta_image, const double attenuate,const double sign,ExceptionInfo *exception) { CacheView *alpha_view, *beta_view, *sum_view; Image *sum_image; MagickBooleanType status = MagickTrue; ssize_t y; /* Add or subtract and optionally attenuate two images. */ sum_image=CloneImage(alpha_image,0,0,MagickTrue,exception); if (sum_image == (Image *) NULL) return(sum_image); alpha_view=AcquireVirtualCacheView(alpha_image,exception); beta_view=AcquireVirtualCacheView(beta_image,exception); sum_view=AcquireAuthenticCacheView(sum_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(alpha_image,sum_image,alpha_image->rows,1) #endif for (y=0; y < (ssize_t) alpha_image->rows; y++) { const Quantum *magick_restrict p, *magick_restrict q; Quantum *magick_restrict r; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(alpha_view,0,y,alpha_image->columns,1, exception); q=GetCacheViewVirtualPixels(beta_view,0,y,alpha_image->columns,1,exception); r=GetCacheViewAuthenticPixels(sum_view,0,y,alpha_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (const Quantum *) NULL) || (r == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) alpha_image->columns; x++) { ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(alpha_image); i++) { PixelChannel channel = GetPixelChannelChannel(alpha_image,i); PixelTrait traits = GetPixelChannelTraits(alpha_image,channel); PixelTrait beta_traits = GetPixelChannelTraits(beta_image,channel); if ((traits == UndefinedPixelTrait) || (beta_traits == UndefinedPixelTrait) || ((beta_traits & UpdatePixelTrait) == 0)) continue; r[i]=ClampToQuantum(attenuate*((double) p[i]+sign* (double) GetPixelChannel(beta_image,channel,q))); } p+=GetPixelChannels(alpha_image); q+=GetPixelChannels(beta_image); r+=GetPixelChannels(sum_image); } if (SyncCacheViewAuthenticPixels(sum_view,exception) == MagickFalse) status=MagickFalse; } sum_view=DestroyCacheView(sum_view); beta_view=DestroyCacheView(beta_view); alpha_view=DestroyCacheView(alpha_view); if (status == MagickFalse) sum_image=DestroyImage(sum_image); return(sum_image); } static Image *BlendDivergentImage(const Image *alpha_image, const Image *beta_image,ExceptionInfo *exception) { #define FreeDivergentResources() \ { \ if (dy_image != (Image *) NULL) \ dy_image=DestroyImage(dy_image); \ if (dx_image != (Image *) NULL) \ dx_image=DestroyImage(dx_image); \ if (magnitude_beta != (Image *) NULL) \ magnitude_beta=DestroyImage(magnitude_beta); \ if (dy_beta != (Image *) NULL) \ dy_beta=DestroyImage(dy_beta); \ if (dx_beta != (Image *) NULL) \ dx_beta=DestroyImage(dx_beta); \ if (magnitude_alpha != (Image *) NULL) \ magnitude_alpha=DestroyImage(magnitude_alpha); \ if (dy_alpha != (Image *) NULL) \ dy_alpha=DestroyImage(dy_alpha); \ if (dx_alpha != (Image *) NULL) \ dx_alpha=DestroyImage(dx_alpha); \ } Image *divergent_image = (Image *) NULL, *dx_alpha = (Image *) NULL, *dx_beta = (Image *) NULL, *dx_divergent = (Image *) NULL, *dx_image = (Image *) NULL, *dy_alpha = (Image *) NULL, *dy_beta = (Image *) NULL, *dy_divergent = (Image *) NULL, *dy_image = (Image *) NULL, *magnitude_alpha = (Image *) NULL, *magnitude_beta = (Image *) NULL; /* Create X and Y gradient images for alpha image and the magnitude. */ dx_alpha=BlendConvolveImage(alpha_image,"3x1:-0.5,0.0,0.5",exception); if (dx_alpha == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } dy_alpha=BlendConvolveImage(alpha_image,"1x3:-0.5,0.0,0.5",exception); if (dy_alpha == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } magnitude_alpha=BlendMagnitudeImage(dx_alpha,dy_alpha,exception); if (magnitude_alpha == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } /* Create X and Y gradient images for beta and the magnitude. */ dx_beta=BlendConvolveImage(beta_image,"3x1:-0.5,0.0,0.5",exception); if (dx_beta == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } dy_beta=BlendConvolveImage(beta_image,"1x3:-0.5,0.0,0.5",exception); if (dy_beta == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } magnitude_beta=BlendMagnitudeImage(dx_beta,dy_beta,exception); if (magnitude_beta == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } /* Select alpha or beta gradient for larger of two magnitudes. */ dx_image=BlendMaxMagnitudeImage(magnitude_alpha,magnitude_beta,dx_alpha, dx_beta,exception); if (dx_image == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } dy_image=BlendMaxMagnitudeImage(magnitude_alpha,magnitude_beta,dy_alpha, dy_beta,exception); if (dy_image == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } dx_beta=DestroyImage(dx_beta); dx_alpha=DestroyImage(dx_alpha); magnitude_beta=DestroyImage(magnitude_beta); magnitude_alpha=DestroyImage(magnitude_alpha); /* Create divergence of gradients dx and dy and divide by 4 as guide image. */ dx_divergent=BlendConvolveImage(dx_image,"3x1:-0.5,0.0,0.5",exception); if (dx_divergent == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } dy_divergent=BlendConvolveImage(dy_image,"1x3:-0.5,0.0,0.5",exception); if (dy_divergent == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } divergent_image=BlendSumImage(dx_divergent,dy_divergent,0.25,1.0,exception); dy_divergent=DestroyImage(dy_divergent); dx_divergent=DestroyImage(dx_divergent); if (divergent_image == (Image *) NULL) { FreeDivergentResources(); return((Image *) NULL); } FreeDivergentResources(); return(divergent_image); } static MagickBooleanType BlendMaskAlphaChannel(Image *image, const Image *mask_image,ExceptionInfo *exception) { CacheView *image_view, *mask_view; MagickBooleanType status = MagickTrue; ssize_t y; /* Threshold the alpha channel. */ if (SetImageAlpha(image,OpaqueAlpha,exception) == MagickFalse) return(MagickFalse); image_view=AcquireAuthenticCacheView(image,exception); mask_view=AcquireVirtualCacheView(mask_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(image,image,image->rows,1) #endif for (y=0; y < (ssize_t) image->rows; y++) { const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(mask_view,0,y,image->columns,1,exception); q=GetCacheViewAuthenticPixels(image_view,0,y,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 alpha = GetPixelAlpha(mask_image,p); ssize_t i = GetPixelChannelOffset(image,AlphaPixelChannel); if (fabs((double) alpha) >= MagickEpsilon) q[i]=(Quantum) 0; p+=GetPixelChannels(mask_image); q+=GetPixelChannels(image); } if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) status=MagickFalse; } mask_view=DestroyCacheView(mask_view); image_view=DestroyCacheView(image_view); return(status); } static Image *BlendMeanImage(Image *image,const Image *mask_image, ExceptionInfo *exception) { CacheView *alpha_view, *mask_view, *mean_view; double mean[MaxPixelChannels]; Image *mean_image; MagickBooleanType status = MagickTrue; ssize_t j, y; /* Compute the mean of the image. */ (void) memset(mean,0,MaxPixelChannels*sizeof(*mean)); alpha_view=AcquireVirtualCacheView(image,exception); for (y=0; y < (ssize_t) image->rows; y++) { const Quantum *magick_restrict p; ssize_t x; p=GetCacheViewVirtualPixels(alpha_view,0,y,image->columns,1, exception); if (p == (const Quantum *) NULL) break; for (x=0; x < (ssize_t) image->columns; x++) { ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(image); i++) { PixelChannel channel = GetPixelChannelChannel(image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); if (traits == UndefinedPixelTrait) continue; mean[i]+=QuantumScale*(double) p[i]; } p+=GetPixelChannels(image); } } alpha_view=DestroyCacheView(alpha_view); if (y < (ssize_t) image->rows) return((Image *) NULL); for (j=0; j < (ssize_t) GetPixelChannels(image); j++) mean[j]=(double) QuantumRange*mean[j]/image->columns/ image->rows; /* Replace any unmasked pixels with the mean pixel. */ mean_image=CloneImage(image,0,0,MagickTrue,exception); if (mean_image == (Image *) NULL) return(mean_image); mask_view=AcquireVirtualCacheView(mask_image,exception); mean_view=AcquireAuthenticCacheView(mean_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(mask_image,mean_image,mean_image->rows,1) #endif for (y=0; y < (ssize_t) mean_image->rows; y++) { const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(mask_view,0,y,mean_image->columns,1,exception); q=GetCacheViewAuthenticPixels(mean_view,0,y,mean_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) mean_image->columns; x++) { Quantum alpha = GetPixelAlpha(mask_image,p), mask = GetPixelReadMask(mask_image,p); ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(mean_image); i++) { PixelChannel channel = GetPixelChannelChannel(mean_image,i); PixelTrait traits = GetPixelChannelTraits(mean_image,channel); if (traits == UndefinedPixelTrait) continue; if (mask <= (QuantumRange/2)) q[i]=(Quantum) 0; else if (fabs((double) alpha) >= MagickEpsilon) q[i]=ClampToQuantum(mean[i]); } p+=GetPixelChannels(mask_image); q+=GetPixelChannels(mean_image); } if (SyncCacheViewAuthenticPixels(mean_view,exception) == MagickFalse) status=MagickFalse; } mask_view=DestroyCacheView(mask_view); mean_view=DestroyCacheView(mean_view); if (status == MagickFalse) mean_image=DestroyImage(mean_image); return(mean_image); } static MagickBooleanType BlendRMSEResidual(const Image *alpha_image, const Image *beta_image,double *residual,ExceptionInfo *exception) { CacheView *alpha_view, *beta_view; double area = 0.0; MagickBooleanType status = MagickTrue; size_t columns = MagickMax(alpha_image->columns,beta_image->columns), rows = MagickMax(alpha_image->rows,beta_image->rows); ssize_t y; *residual=0.0; alpha_view=AcquireVirtualCacheView(alpha_image,exception); beta_view=AcquireVirtualCacheView(beta_image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(alpha_image,alpha_image,rows,1) #endif for (y=0; y < (ssize_t) rows; y++) { const Quantum *magick_restrict p, *magick_restrict q; double channel_residual; size_t local_area = 0; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(alpha_view,0,y,columns,1,exception); q=GetCacheViewVirtualPixels(beta_view,0,y,columns,1,exception); if ((p == (const Quantum *) NULL) || (q == (const Quantum *) NULL)) { status=MagickFalse; continue; } channel_residual=0.0; for (x=0; x < (ssize_t) columns; x++) { double Da, Sa; ssize_t i; if ((GetPixelReadMask(alpha_image,p) <= (QuantumRange/2)) || (GetPixelReadMask(beta_image,q) <= (QuantumRange/2))) { p+=GetPixelChannels(alpha_image); q+=GetPixelChannels(beta_image); continue; } Sa=QuantumScale*(double) GetPixelAlpha(alpha_image,p); Da=QuantumScale*(double) GetPixelAlpha(beta_image,q); for (i=0; i < (ssize_t) GetPixelChannels(alpha_image); i++) { double distance; PixelChannel channel = GetPixelChannelChannel(alpha_image,i); PixelTrait traits = GetPixelChannelTraits(alpha_image,channel); PixelTrait beta_traits = GetPixelChannelTraits(beta_image,channel); if ((traits == UndefinedPixelTrait) || (beta_traits == UndefinedPixelTrait) || ((beta_traits & UpdatePixelTrait) == 0)) continue; if (channel == AlphaPixelChannel) distance=QuantumScale*((double) p[i]-(double) GetPixelChannel( beta_image,channel,q)); else distance=QuantumScale*(Sa*(double) p[i]-Da*(double) GetPixelChannel( beta_image,channel,q)); channel_residual+=distance*distance; } local_area++; p+=GetPixelChannels(alpha_image); q+=GetPixelChannels(beta_image); } #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp critical (MagickCore_BlendRMSEResidual) #endif { area+=local_area; *residual+=channel_residual; } } area=PerceptibleReciprocal(area); beta_view=DestroyCacheView(beta_view); alpha_view=DestroyCacheView(alpha_view); *residual=sqrt(*residual*area/(double) GetImageChannels(alpha_image)); return(status); } static void CompositeHCL(const MagickRealType red,const MagickRealType green, const MagickRealType blue,MagickRealType *hue,MagickRealType *chroma, MagickRealType *luma) { MagickRealType b, c, g, h, max, r; /* Convert RGB to HCL colorspace. */ assert(hue != (MagickRealType *) NULL); assert(chroma != (MagickRealType *) NULL); assert(luma != (MagickRealType *) NULL); r=red; g=green; b=blue; max=MagickMax(r,MagickMax(g,b)); c=max-(MagickRealType) MagickMin(r,MagickMin(g,b)); h=0.0; if (c == 0) h=0.0; else if (red == max) h=fmod((g-b)/c+6.0,6.0); else if (green == max) h=((b-r)/c)+2.0; else if (blue == max) h=((r-g)/c)+4.0; *hue=(h/6.0); *chroma=QuantumScale*c; *luma=QuantumScale*(0.298839*r+0.586811*g+0.114350*b); } static MagickBooleanType CompositeOverImage(Image *image, const Image *source_image,const MagickBooleanType clip_to_self, const ssize_t x_offset,const ssize_t y_offset,ExceptionInfo *exception) { #define CompositeImageTag "Composite/Image" CacheView *image_view, *source_view; const char *value; MagickBooleanType clamp, status; MagickOffsetType progress; ssize_t y; /* Composite image. */ status=MagickTrue; progress=0; clamp=MagickTrue; value=GetImageArtifact(image,"compose:clamp"); if (value != (const char *) NULL) clamp=IsStringTrue(value); status=MagickTrue; progress=0; source_view=AcquireVirtualCacheView(source_image,exception); image_view=AcquireAuthenticCacheView(image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(progress,status) \ magick_number_threads(source_image,image,image->rows,1) #endif for (y=0; y < (ssize_t) image->rows; y++) { const Quantum *pixels; PixelInfo canvas_pixel, source_pixel; const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (status == MagickFalse) continue; if (clip_to_self != MagickFalse) { if (y < y_offset) continue; if ((y-y_offset) >= (ssize_t) source_image->rows) continue; } /* If pixels is NULL, y is outside overlay region. */ pixels=(Quantum *) NULL; p=(Quantum *) NULL; if ((y >= y_offset) && ((y-y_offset) < (ssize_t) source_image->rows)) { p=GetCacheViewVirtualPixels(source_view,0,y-y_offset, source_image->columns,1,exception); if (p == (const Quantum *) NULL) { status=MagickFalse; continue; } pixels=p; if (x_offset < 0) p-=CastDoubleToLong((double) x_offset*GetPixelChannels(source_image)); } q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) { status=MagickFalse; continue; } GetPixelInfo(image,&canvas_pixel); GetPixelInfo(source_image,&source_pixel); for (x=0; x < (ssize_t) image->columns; x++) { double gamma; MagickRealType alpha, Da, Dc, Dca, Sa, Sc, Sca; ssize_t i; size_t channels; if (clip_to_self != MagickFalse) { if (x < x_offset) { q+=GetPixelChannels(image); continue; } if ((x-x_offset) >= (ssize_t) source_image->columns) break; } if ((pixels == (Quantum *) NULL) || (x < x_offset) || ((x-x_offset) >= (ssize_t) source_image->columns)) { Quantum source[MaxPixelChannels]; /* Virtual composite: Sc: source color. Dc: canvas color. */ (void) GetOneVirtualPixel(source_image,x-x_offset,y-y_offset,source, exception); for (i=0; i < (ssize_t) GetPixelChannels(image); i++) { MagickRealType pixel; PixelChannel channel = GetPixelChannelChannel(image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); PixelTrait source_traits=GetPixelChannelTraits(source_image, channel); if ((traits == UndefinedPixelTrait) || (source_traits == UndefinedPixelTrait)) continue; if (channel == AlphaPixelChannel) pixel=(MagickRealType) TransparentAlpha; else pixel=(MagickRealType) q[i]; q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); } q+=GetPixelChannels(image); continue; } /* Authentic composite: Sa: normalized source alpha. Da: normalized canvas alpha. */ Sa=QuantumScale*(double) GetPixelAlpha(source_image,p); Da=QuantumScale*(double) GetPixelAlpha(image,q); alpha=Sa+Da-Sa*Da; for (i=0; i < (ssize_t) GetPixelChannels(image); i++) { MagickRealType pixel; PixelChannel channel = GetPixelChannelChannel(image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); PixelTrait source_traits=GetPixelChannelTraits(source_image,channel); if (traits == UndefinedPixelTrait) continue; if ((source_traits == UndefinedPixelTrait) && (channel != AlphaPixelChannel)) continue; if (channel == AlphaPixelChannel) { /* Set alpha channel. */ pixel=(double) QuantumRange*alpha; q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); continue; } /* Sc: source color. Dc: canvas color. */ Sc=(MagickRealType) GetPixelChannel(source_image,channel,p); Dc=(MagickRealType) q[i]; if ((traits & CopyPixelTrait) != 0) { /* Copy channel. */ q[i]=ClampToQuantum(Sc); continue; } /* Porter-Duff compositions: Sca: source normalized color multiplied by alpha. Dca: normalized canvas color multiplied by alpha. */ Sca=QuantumScale*Sa*Sc; Dca=QuantumScale*Da*Dc; gamma=PerceptibleReciprocal(alpha); pixel=(double) QuantumRange*gamma*(Sca+Dca*(1.0-Sa)); q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); } p+=GetPixelChannels(source_image); channels=GetPixelChannels(source_image); if (p >= (pixels+channels*source_image->columns)) p=pixels; 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 atomic #endif progress++; proceed=SetImageProgress(image,CompositeImageTag,progress,image->rows); if (proceed == MagickFalse) status=MagickFalse; } } source_view=DestroyCacheView(source_view); image_view=DestroyCacheView(image_view); return(status); } static void HCLComposite(const MagickRealType hue,const MagickRealType chroma, const MagickRealType luma,MagickRealType *red,MagickRealType *green, MagickRealType *blue) { MagickRealType b, c, g, h, m, r, x; /* Convert HCL to RGB colorspace. */ assert(red != (MagickRealType *) NULL); assert(green != (MagickRealType *) NULL); assert(blue != (MagickRealType *) NULL); h=6.0*hue; c=chroma; x=c*(1.0-fabs(fmod(h,2.0)-1.0)); r=0.0; g=0.0; b=0.0; if ((0.0 <= h) && (h < 1.0)) { r=c; g=x; } else if ((1.0 <= h) && (h < 2.0)) { r=x; g=c; } else if ((2.0 <= h) && (h < 3.0)) { g=c; b=x; } else if ((3.0 <= h) && (h < 4.0)) { g=x; b=c; } else if ((4.0 <= h) && (h < 5.0)) { r=x; b=c; } else if ((5.0 <= h) && (h < 6.0)) { r=c; b=x; } m=luma-(0.298839*r+0.586811*g+0.114350*b); *red=(double) QuantumRange*(r+m); *green=(double) QuantumRange*(g+m); *blue=(double) QuantumRange*(b+m); } static MagickBooleanType SaliencyBlendImage(Image *image, const Image *source_image,const ssize_t x_offset,const ssize_t y_offset, const double iterations,const double residual_threshold,const size_t tick, ExceptionInfo *exception) { Image *crop_image, *divergent_image, *relax_image, *residual_image = (Image *) NULL; KernelInfo *kernel_info; MagickBooleanType status = MagickTrue, verbose = MagickFalse; RectangleInfo crop_info = { source_image->columns, source_image->rows, x_offset, y_offset }; size_t i; /* Saliency blend composite operator. */ crop_image=CropImage(image,&crop_info,exception); if (crop_image == (Image *) NULL) return(MagickFalse); DisableCompositeClampUnlessSpecified(crop_image); divergent_image=BlendDivergentImage(crop_image,source_image,exception); if (divergent_image == (Image *) NULL) { crop_image=DestroyImage(crop_image); return(MagickFalse); } (void) ResetImagePage(crop_image,"0x0+0+0"); relax_image=BlendMeanImage(crop_image,source_image,exception); if (relax_image == (Image *) NULL) { crop_image=DestroyImage(crop_image); divergent_image=DestroyImage(divergent_image); return(MagickFalse); } status=BlendMaskAlphaChannel(crop_image,source_image,exception); if (status == MagickFalse) { crop_image=DestroyImage(crop_image); divergent_image=DestroyImage(divergent_image); return(MagickFalse); } residual_image=CloneImage(relax_image,0,0,MagickTrue,exception); if (residual_image == (Image *) NULL) { crop_image=DestroyImage(crop_image); relax_image=DestroyImage(relax_image); return(MagickFalse); } /* Convolve relaxed image and blur area of interest. */ kernel_info=AcquireKernelInfo("3x3:0,0.25,0,0.25,0,0.25,0,0.25,0",exception); if (kernel_info == (KernelInfo *) NULL) { crop_image=DestroyImage(crop_image); residual_image=DestroyImage(residual_image); relax_image=DestroyImage(relax_image); return(MagickFalse); } verbose=IsStringTrue(GetImageArtifact(image,"verbose")); if (verbose != MagickFalse) (void) FormatLocaleFile(stderr,"saliency blending:\n"); for (i=0; i < iterations; i++) { double residual = 1.0; Image *convolve_image, *sum_image; convolve_image=ConvolveImage(relax_image,kernel_info,exception); if (convolve_image == (Image *) NULL) break; relax_image=DestroyImage(relax_image); relax_image=convolve_image; sum_image=BlendSumImage(relax_image,divergent_image,1.0,-1.0,exception); if (sum_image == (Image *) NULL) break; relax_image=DestroyImage(relax_image); relax_image=sum_image; status=CompositeOverImage(relax_image,crop_image,MagickTrue,0,0,exception); if (status == MagickFalse) break; status=BlendRMSEResidual(relax_image,residual_image,&residual,exception); if (status == MagickFalse) break; if ((verbose != MagickFalse) && ((i % MagickMax(tick,1)) == 0)) (void) FormatLocaleFile(stderr," %g: %g\n",(double) i,(double) residual); if (residual < residual_threshold) { if (verbose != MagickFalse) (void) FormatLocaleFile(stderr," %g: %g\n",(double) i,(double) residual); break; } residual_image=DestroyImage(residual_image); residual_image=CloneImage(relax_image,0,0,MagickTrue,exception); if (residual_image == (Image *) NULL) break; } kernel_info=DestroyKernelInfo(kernel_info); crop_image=DestroyImage(crop_image); divergent_image=DestroyImage(divergent_image); residual_image=DestroyImage(residual_image); /* Composite relaxed over the background image. */ status=CompositeOverImage(image,relax_image,MagickTrue,x_offset,y_offset, exception); relax_image=DestroyImage(relax_image); return(status); } static MagickBooleanType SeamlessBlendImage(Image *image, const Image *source_image,const ssize_t x_offset,const ssize_t y_offset, const double iterations,const double residual_threshold,const size_t tick, ExceptionInfo *exception) { Image *crop_image, *foreground_image, *mean_image, *relax_image, *residual_image, *sum_image; KernelInfo *kernel_info; MagickBooleanType status = MagickTrue, verbose = MagickFalse; RectangleInfo crop_info = { source_image->columns, source_image->rows, x_offset, y_offset }; size_t i; /* Seamless blend composite operator. */ crop_image=CropImage(image,&crop_info,exception); if (crop_image == (Image *) NULL) return(MagickFalse); DisableCompositeClampUnlessSpecified(crop_image); (void) ResetImagePage(crop_image,"0x0+0+0"); sum_image=BlendSumImage(crop_image,source_image,1.0,-1.0,exception); crop_image=DestroyImage(crop_image); if (sum_image == (Image *) NULL) return(MagickFalse); mean_image=BlendMeanImage(sum_image,source_image,exception); sum_image=DestroyImage(sum_image); if (mean_image == (Image *) NULL) return(MagickFalse); relax_image=CloneImage(mean_image,0,0,MagickTrue,exception); if (relax_image == (Image *) NULL) { mean_image=DestroyImage(mean_image); return(MagickFalse); } status=BlendMaskAlphaChannel(mean_image,source_image,exception); if (status == MagickFalse) { relax_image=DestroyImage(relax_image); mean_image=DestroyImage(mean_image); return(MagickFalse); } residual_image=CloneImage(relax_image,0,0,MagickTrue,exception); if (residual_image == (Image *) NULL) { relax_image=DestroyImage(relax_image); mean_image=DestroyImage(mean_image); return(MagickFalse); } /* Convolve relaxed image and blur area of interest. */ kernel_info=AcquireKernelInfo("3x3:0,0.25,0,0.25,0,0.25,0,0.25,0",exception); if (kernel_info == (KernelInfo *) NULL) { residual_image=DestroyImage(residual_image); relax_image=DestroyImage(relax_image); mean_image=DestroyImage(mean_image); return(MagickFalse); } verbose=IsStringTrue(GetImageArtifact(image,"verbose")); if (verbose != MagickFalse) (void) FormatLocaleFile(stderr,"seamless blending:\n"); for (i=0; i < iterations; i++) { double residual = 1.0; Image *convolve_image; convolve_image=ConvolveImage(relax_image,kernel_info,exception); if (convolve_image == (Image *) NULL) break; relax_image=DestroyImage(relax_image); relax_image=convolve_image; status=CompositeOverImage(relax_image,mean_image,MagickTrue,0,0,exception); if (status == MagickFalse) break; status=BlendRMSEResidual(relax_image,residual_image,&residual,exception); if (status == MagickFalse) break; if ((verbose != MagickFalse) && ((i % MagickMax(tick,1)) == 0)) (void) FormatLocaleFile(stderr," %g: %g\n",(double) i,(double) residual); if (residual < residual_threshold) { if (verbose != MagickFalse) (void) FormatLocaleFile(stderr," %g: %g\n",(double) i,(double) residual); break; } if (residual_image != (Image *) NULL) residual_image=DestroyImage(residual_image); residual_image=CloneImage(relax_image,0,0,MagickTrue,exception); if (residual_image == (Image *) NULL) break; } kernel_info=DestroyKernelInfo(kernel_info); mean_image=DestroyImage(mean_image); residual_image=DestroyImage(residual_image); /* Composite the foreground image over the background image. */ foreground_image=BlendSumImage(source_image,relax_image,1.0,1.0,exception); relax_image=DestroyImage(relax_image); if (foreground_image == (Image *) NULL) return(MagickFalse); (void) SetImageMask(foreground_image,ReadPixelMask,(const Image *) NULL, exception); status=CompositeOverImage(image,foreground_image,MagickTrue,x_offset,y_offset, exception); foreground_image=DestroyImage(foreground_image); return(status); } MagickExport MagickBooleanType CompositeImage(Image *image, const Image *composite,const CompositeOperator compose, const MagickBooleanType clip_to_self,const ssize_t x_offset, const ssize_t y_offset,ExceptionInfo *exception) { #define CompositeImageTag "Composite/Image" CacheView *source_view, *image_view; const char *value; GeometryInfo geometry_info; Image *canvas_image, *source_image; MagickBooleanType clamp, compose_sync, status; MagickOffsetType progress; MagickRealType amount, canvas_dissolve, midpoint, percent_luma, percent_chroma, source_dissolve, threshold; MagickStatusType flags; ssize_t y; assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); assert(composite != (Image *) NULL); assert(composite->signature == MagickCoreSignature); if (IsEventLogging() != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse) return(MagickFalse); source_image=CloneImage(composite,0,0,MagickTrue,exception); if (source_image == (const Image *) NULL) return(MagickFalse); (void) SetImageColorspace(source_image,image->colorspace,exception); if ((compose == OverCompositeOp) || (compose == SrcOverCompositeOp)) { status=CompositeOverImage(image,source_image,clip_to_self,x_offset, y_offset,exception); source_image=DestroyImage(source_image); return(status); } amount=0.5; canvas_image=(Image *) NULL; canvas_dissolve=1.0; clamp=MagickTrue; value=GetImageArtifact(image,"compose:clamp"); if (value != (const char *) NULL) clamp=IsStringTrue(value); compose_sync=MagickTrue; value=GetImageArtifact(image,"compose:sync"); if (value != (const char *) NULL) compose_sync=IsStringTrue(value); SetGeometryInfo(&geometry_info); percent_luma=100.0; percent_chroma=100.0; source_dissolve=1.0; threshold=0.05f; switch (compose) { case CopyCompositeOp: { if ((x_offset < 0) || (y_offset < 0)) break; if ((x_offset+(ssize_t) source_image->columns) > (ssize_t) image->columns) break; if ((y_offset+(ssize_t) source_image->rows) > (ssize_t) image->rows) break; if ((source_image->alpha_trait == UndefinedPixelTrait) && (image->alpha_trait != UndefinedPixelTrait)) (void) SetImageAlphaChannel(source_image,OpaqueAlphaChannel,exception); status=MagickTrue; source_view=AcquireVirtualCacheView(source_image,exception); image_view=AcquireAuthenticCacheView(image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(source_image,image,source_image->rows,1) #endif for (y=0; y < (ssize_t) source_image->rows; y++) { MagickBooleanType sync; const Quantum *p; Quantum *q; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, exception); q=GetCacheViewAuthenticPixels(image_view,x_offset,y+y_offset, source_image->columns,1,exception); if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) source_image->columns; x++) { ssize_t i; if (GetPixelReadMask(source_image,p) <= (QuantumRange/2)) { p+=GetPixelChannels(source_image); q+=GetPixelChannels(image); continue; } for (i=0; i < (ssize_t) GetPixelChannels(source_image); i++) { PixelChannel channel = GetPixelChannelChannel(source_image,i); PixelTrait source_traits = GetPixelChannelTraits(source_image, channel); PixelTrait traits = GetPixelChannelTraits(image,channel); if ((source_traits == UndefinedPixelTrait) || (traits == UndefinedPixelTrait)) continue; SetPixelChannel(image,channel,p[i],q); } p+=GetPixelChannels(source_image); q+=GetPixelChannels(image); } sync=SyncCacheViewAuthenticPixels(image_view,exception); if (sync == MagickFalse) status=MagickFalse; if (image->progress_monitor != (MagickProgressMonitor) NULL) { MagickBooleanType proceed; proceed=SetImageProgress(image,CompositeImageTag,(MagickOffsetType) y,image->rows); if (proceed == MagickFalse) status=MagickFalse; } } source_view=DestroyCacheView(source_view); image_view=DestroyCacheView(image_view); source_image=DestroyImage(source_image); return(status); } case IntensityCompositeOp: { if ((x_offset < 0) || (y_offset < 0)) break; if ((x_offset+(ssize_t) source_image->columns) > (ssize_t) image->columns) break; if ((y_offset+(ssize_t) source_image->rows) > (ssize_t) image->rows) break; status=MagickTrue; source_view=AcquireVirtualCacheView(source_image,exception); image_view=AcquireAuthenticCacheView(image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(source_image,image,source_image->rows,1) #endif for (y=0; y < (ssize_t) source_image->rows; y++) { MagickBooleanType sync; const Quantum *p; Quantum *q; ssize_t x; if (status == MagickFalse) continue; p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, exception); q=GetCacheViewAuthenticPixels(image_view,x_offset,y+y_offset, source_image->columns,1,exception); if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) source_image->columns; x++) { if (GetPixelReadMask(source_image,p) <= (QuantumRange/2)) { p+=GetPixelChannels(source_image); q+=GetPixelChannels(image); continue; } SetPixelAlpha(image,clamp != MagickFalse ? ClampPixel(GetPixelIntensity(source_image,p)) : ClampToQuantum(GetPixelIntensity(source_image,p)),q); p+=GetPixelChannels(source_image); q+=GetPixelChannels(image); } sync=SyncCacheViewAuthenticPixels(image_view,exception); if (sync == MagickFalse) status=MagickFalse; if (image->progress_monitor != (MagickProgressMonitor) NULL) { MagickBooleanType proceed; proceed=SetImageProgress(image,CompositeImageTag,(MagickOffsetType) y,image->rows); if (proceed == MagickFalse) status=MagickFalse; } } source_view=DestroyCacheView(source_view); image_view=DestroyCacheView(image_view); source_image=DestroyImage(source_image); return(status); } case CopyAlphaCompositeOp: case ChangeMaskCompositeOp: { /* Modify canvas outside the overlaid region and require an alpha channel to exist, to add transparency. */ if ((image->alpha_trait & BlendPixelTrait) == 0) (void) SetImageAlphaChannel(image,OpaqueAlphaChannel,exception); break; } case BlurCompositeOp: { CacheView *canvas_view; double angle_range, angle_start, height, width; PixelInfo pixel; ResampleFilter *resample_filter; SegmentInfo blur; /* Blur Image by resampling dictated by an overlay gradient map: X = red_channel; Y = green_channel; compose:args = x_scale[,y_scale[,angle]]. */ canvas_image=CloneImage(image,0,0,MagickTrue,exception); if (canvas_image == (Image *) NULL) { source_image=DestroyImage(source_image); return(MagickFalse); } /* Gather the maximum blur sigma values from user. */ flags=NoValue; value=GetImageArtifact(image,"compose:args"); if (value != (const char *) NULL) flags=ParseGeometry(value,&geometry_info); if ((flags & WidthValue) == 0) { (void) ThrowMagickException(exception,GetMagickModule(),OptionWarning, "InvalidSetting","'%s' '%s'","compose:args",value); source_image=DestroyImage(source_image); canvas_image=DestroyImage(canvas_image); return(MagickFalse); } /* Users input sigma now needs to be converted to the EWA ellipse size. The filter defaults to a sigma of 0.5 so to make this match the users input the ellipse size needs to be doubled. */ width=2.0*geometry_info.rho; height=width; if ((flags & HeightValue) != 0) height=2.0*geometry_info.sigma; /* Default the unrotated ellipse width and height axis vectors. */ blur.x1=width; blur.x2=0.0; blur.y1=0.0; blur.y2=height; if ((flags & XValue) != 0 ) { MagickRealType angle; /* Rotate vectors if a rotation angle is given. */ angle=DegreesToRadians(geometry_info.xi); blur.x1=width*cos(angle); blur.x2=width*sin(angle); blur.y1=(-height*sin(angle)); blur.y2=height*cos(angle); } angle_start=0.0; angle_range=0.0; if ((flags & YValue) != 0 ) { /* Lets set a angle range and calculate in the loop. */ angle_start=DegreesToRadians(geometry_info.xi); angle_range=DegreesToRadians(geometry_info.psi)-angle_start; } /* Set up a gaussian cylindrical filter for EWA Blurring. As the minimum ellipse radius of support*1.0 the EWA algorithm can only produce a minimum blur of 0.5 for Gaussian (support=2.0) This means that even 'No Blur' will be still a little blurry! The solution (as well as the problem of preventing any user expert filter settings, is to set our own user settings, restore them afterwards. */ resample_filter=AcquireResampleFilter(image,exception); SetResampleFilter(resample_filter,GaussianFilter); /* Perform the variable blurring of each pixel in image. */ GetPixelInfo(image,&pixel); source_view=AcquireVirtualCacheView(source_image,exception); canvas_view=AcquireAuthenticCacheView(canvas_image,exception); for (y=0; y < (ssize_t) source_image->rows; y++) { MagickBooleanType sync; const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (((y+y_offset) < 0) || ((y+y_offset) >= (ssize_t) image->rows)) continue; p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, exception); q=QueueCacheViewAuthenticPixels(canvas_view,0,y,canvas_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) break; for (x=0; x < (ssize_t) source_image->columns; x++) { if (((x_offset+x) < 0) || ((x_offset+x) >= (ssize_t) image->columns)) { p+=GetPixelChannels(source_image); continue; } if (fabs(angle_range) > MagickEpsilon) { MagickRealType angle; angle=angle_start+angle_range*QuantumScale*(double) GetPixelBlue(source_image,p); blur.x1=width*cos(angle); blur.x2=width*sin(angle); blur.y1=(-height*sin(angle)); blur.y2=height*cos(angle); } ScaleResampleFilter(resample_filter, blur.x1*QuantumScale*(double) GetPixelRed(source_image,p), blur.y1*QuantumScale*(double) GetPixelGreen(source_image,p), blur.x2*QuantumScale*(double) GetPixelRed(source_image,p), blur.y2*QuantumScale*(double) GetPixelGreen(source_image,p) ); (void) ResamplePixelColor(resample_filter,(double) x_offset+x, (double) y_offset+y,&pixel,exception); SetPixelViaPixelInfo(canvas_image,&pixel,q); p+=GetPixelChannels(source_image); q+=GetPixelChannels(canvas_image); } sync=SyncCacheViewAuthenticPixels(canvas_view,exception); if (sync == MagickFalse) break; } resample_filter=DestroyResampleFilter(resample_filter); source_view=DestroyCacheView(source_view); canvas_view=DestroyCacheView(canvas_view); source_image=DestroyImage(source_image); source_image=canvas_image; break; } case DisplaceCompositeOp: case DistortCompositeOp: { CacheView *canvas_view; MagickRealType horizontal_scale, vertical_scale; PixelInfo pixel; PointInfo center, offset; /* Displace/Distort based on overlay gradient map: X = red_channel; Y = green_channel; compose:args = x_scale[,y_scale[,center.x,center.y]] */ canvas_image=CloneImage(image,0,0,MagickTrue,exception); if (canvas_image == (Image *) NULL) { source_image=DestroyImage(source_image); return(MagickFalse); } SetGeometryInfo(&geometry_info); flags=NoValue; value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) flags=ParseGeometry(value,&geometry_info); if ((flags & (WidthValue | HeightValue)) == 0 ) { if ((flags & AspectValue) == 0) { horizontal_scale=(MagickRealType) (source_image->columns-1)/2.0; vertical_scale=(MagickRealType) (source_image->rows-1)/2.0; } else { horizontal_scale=(MagickRealType) (image->columns-1)/2.0; vertical_scale=(MagickRealType) (image->rows-1)/2.0; } } else { horizontal_scale=geometry_info.rho; vertical_scale=geometry_info.sigma; if ((flags & PercentValue) != 0) { if ((flags & AspectValue) == 0) { horizontal_scale*=(source_image->columns-1)/200.0; vertical_scale*=(source_image->rows-1)/200.0; } else { horizontal_scale*=(image->columns-1)/200.0; vertical_scale*=(image->rows-1)/200.0; } } if ((flags & HeightValue) == 0) vertical_scale=horizontal_scale; } /* Determine fixed center point for absolute distortion map Absolute distort == Displace offset relative to a fixed absolute point Select that point according to +X+Y user inputs. default = center of overlay image arg flag '!' = locations/percentage relative to background image */ center.x=(MagickRealType) x_offset; center.y=(MagickRealType) y_offset; if (compose == DistortCompositeOp) { if ((flags & XValue) == 0) if ((flags & AspectValue) != 0) center.x=(MagickRealType) ((image->columns-1)/2.0); else center.x=(MagickRealType) (x_offset+(source_image->columns-1)/ 2.0); else if ((flags & AspectValue) != 0) center.x=geometry_info.xi; else center.x=(MagickRealType) (x_offset+geometry_info.xi); if ((flags & YValue) == 0) if ((flags & AspectValue) != 0) center.y=(MagickRealType) ((image->rows-1)/2.0); else center.y=(MagickRealType) (y_offset+(source_image->rows-1)/2.0); else if ((flags & AspectValue) != 0) center.y=geometry_info.psi; else center.y=(MagickRealType) (y_offset+geometry_info.psi); } /* Shift the pixel offset point as defined by the provided, displacement/distortion map. -- Like a lens... */ GetPixelInfo(image,&pixel); image_view=AcquireVirtualCacheView(image,exception); source_view=AcquireVirtualCacheView(source_image,exception); canvas_view=AcquireAuthenticCacheView(canvas_image,exception); for (y=0; y < (ssize_t) source_image->rows; y++) { MagickBooleanType sync; const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (((y+y_offset) < 0) || ((y+y_offset) >= (ssize_t) image->rows)) continue; p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, exception); q=QueueCacheViewAuthenticPixels(canvas_view,0,y,canvas_image->columns,1, exception); if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) break; for (x=0; x < (ssize_t) source_image->columns; x++) { if (((x_offset+x) < 0) || ((x_offset+x) >= (ssize_t) image->columns)) { p+=GetPixelChannels(source_image); continue; } /* Displace the offset. */ offset.x=(double) (horizontal_scale*((double) GetPixelRed( source_image,p)-(((MagickRealType) QuantumRange+1.0)/2.0)))/ (((MagickRealType) QuantumRange+1.0)/2.0)+center.x+ ((compose == DisplaceCompositeOp) ? x : 0); offset.y=(double) (vertical_scale*((double) GetPixelGreen( source_image,p)-(((MagickRealType) QuantumRange+1.0)/2.0)))/ (((MagickRealType) QuantumRange+1.0)/2.0)+center.y+ ((compose == DisplaceCompositeOp) ? y : 0); status=InterpolatePixelInfo(image,image_view, UndefinedInterpolatePixel,(double) offset.x,(double) offset.y, &pixel,exception); if (status == MagickFalse) break; /* Mask with the 'invalid pixel mask' in alpha channel. */ pixel.alpha=(MagickRealType) QuantumRange*(QuantumScale*pixel.alpha)* (QuantumScale*(double) GetPixelAlpha(source_image,p)); SetPixelViaPixelInfo(canvas_image,&pixel,q); p+=GetPixelChannels(source_image); q+=GetPixelChannels(canvas_image); } if (x < (ssize_t) source_image->columns) break; sync=SyncCacheViewAuthenticPixels(canvas_view,exception); if (sync == MagickFalse) break; } canvas_view=DestroyCacheView(canvas_view); source_view=DestroyCacheView(source_view); image_view=DestroyCacheView(image_view); source_image=DestroyImage(source_image); source_image=canvas_image; break; } case DissolveCompositeOp: { /* Geometry arguments to dissolve factors. */ value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); source_dissolve=geometry_info.rho/100.0; canvas_dissolve=1.0; if ((source_dissolve-MagickEpsilon) < 0.0) source_dissolve=0.0; if ((source_dissolve+MagickEpsilon) > 1.0) { canvas_dissolve=2.0-source_dissolve; source_dissolve=1.0; } if ((flags & SigmaValue) != 0) canvas_dissolve=geometry_info.sigma/100.0; if ((canvas_dissolve-MagickEpsilon) < 0.0) canvas_dissolve=0.0; if ((canvas_dissolve+MagickEpsilon) > 1.0) canvas_dissolve=1.0; } break; } case BlendCompositeOp: { value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); source_dissolve=geometry_info.rho/100.0; canvas_dissolve=1.0-source_dissolve; if ((flags & SigmaValue) != 0) canvas_dissolve=geometry_info.sigma/100.0; } break; } case SaliencyBlendCompositeOp: { double residual_threshold = 0.0002, iterations = 400.0; size_t tick = 100; value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); iterations=geometry_info.rho; if ((flags & SigmaValue) != 0) residual_threshold=geometry_info.sigma; if ((flags & XiValue) != 0) tick=(size_t) geometry_info.xi; } status=SaliencyBlendImage(image,composite,x_offset,y_offset,iterations, residual_threshold,tick,exception); source_image=DestroyImage(source_image); return(status); } case SeamlessBlendCompositeOp: { double residual_threshold = 0.0002, iterations = 400.0; size_t tick = 100; value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); iterations=geometry_info.rho; if ((flags & SigmaValue) != 0) residual_threshold=geometry_info.sigma; if ((flags & XiValue) != 0) tick=(size_t) geometry_info.xi; } status=SeamlessBlendImage(image,composite,x_offset,y_offset,iterations, residual_threshold,tick,exception); source_image=DestroyImage(source_image); return(status); } case MathematicsCompositeOp: { /* Just collect the values from "compose:args", setting. Unused values are set to zero automagically. Arguments are normally a comma separated list, so this probably should be changed to some 'general comma list' parser, (with a minimum number of values) */ SetGeometryInfo(&geometry_info); value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); if (flags == NoValue) (void) ThrowMagickException(exception,GetMagickModule(),OptionError, "InvalidGeometry","`%s'",value); } break; } case ModulateCompositeOp: { /* Determine the luma and chroma scale. */ value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); percent_luma=geometry_info.rho; if ((flags & SigmaValue) != 0) percent_chroma=geometry_info.sigma; } break; } case ThresholdCompositeOp: { /* Determine the amount and threshold. */ value=GetImageArtifact(image,"compose:args"); if (value != (char *) NULL) { flags=ParseGeometry(value,&geometry_info); amount=geometry_info.rho; threshold=geometry_info.sigma; if ((flags & SigmaValue) == 0) threshold=0.05f; } threshold*=(double) QuantumRange; break; } default: break; } /* Composite image. */ status=MagickTrue; progress=0; midpoint=((MagickRealType) QuantumRange+1.0)/2; source_view=AcquireVirtualCacheView(source_image,exception); image_view=AcquireAuthenticCacheView(image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(progress,status) \ magick_number_threads(source_image,image,image->rows,1) #endif for (y=0; y < (ssize_t) image->rows; y++) { const Quantum *pixels; MagickRealType blue = 0.0, chroma = 0.0, green = 0.0, hue = 0.0, luma = 0.0, red = 0.0; PixelInfo canvas_pixel, source_pixel; const Quantum *magick_restrict p; Quantum *magick_restrict q; ssize_t x; if (status == MagickFalse) continue; if (clip_to_self != MagickFalse) { if (y < y_offset) continue; if ((y-y_offset) >= (ssize_t) source_image->rows) continue; } /* If pixels is NULL, y is outside overlay region. */ pixels=(Quantum *) NULL; p=(Quantum *) NULL; if ((y >= y_offset) && ((y-y_offset) < (ssize_t) source_image->rows)) { p=GetCacheViewVirtualPixels(source_view,0,y-y_offset, source_image->columns,1,exception); if (p == (const Quantum *) NULL) { status=MagickFalse; continue; } pixels=p; if (x_offset < 0) p-=CastDoubleToLong((double) x_offset*GetPixelChannels(source_image)); } q=GetCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); if (q == (Quantum *) NULL) { status=MagickFalse; continue; } GetPixelInfo(image,&canvas_pixel); GetPixelInfo(source_image,&source_pixel); for (x=0; x < (ssize_t) image->columns; x++) { double gamma = 0.0; MagickRealType alpha = 0.0, Da = 0.0, Dc = 0.0, Dca = 0.0, DcaDa = 0.0, Di = 0.0, Sa = 0.0, SaSca = 0.0, Sc = 0.0, Sca = 0.0, Si = 0.0; ssize_t i; size_t channels; if (clip_to_self != MagickFalse) { if (x < x_offset) { q+=GetPixelChannels(image); continue; } if ((x-x_offset) >= (ssize_t) source_image->columns) break; } if ((pixels == (Quantum *) NULL) || (x < x_offset) || ((x-x_offset) >= (ssize_t) source_image->columns)) { Quantum source[MaxPixelChannels]; /* Virtual composite: Sc: source color. Dc: canvas color. */ (void) GetOneVirtualPixel(source_image,x-x_offset,y-y_offset,source, exception); for (i=0; i < (ssize_t) GetPixelChannels(image); i++) { MagickRealType pixel = 0.0; PixelChannel channel = GetPixelChannelChannel(image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); PixelTrait source_traits = GetPixelChannelTraits(source_image, channel); if ((traits == UndefinedPixelTrait) || (source_traits == UndefinedPixelTrait)) continue; switch (compose) { case AlphaCompositeOp: case ChangeMaskCompositeOp: case CopyAlphaCompositeOp: case DstAtopCompositeOp: case DstInCompositeOp: case InCompositeOp: case OutCompositeOp: case SrcInCompositeOp: case SrcOutCompositeOp: { if (channel == AlphaPixelChannel) pixel=(MagickRealType) TransparentAlpha; else pixel=(MagickRealType) q[i]; break; } case ClearCompositeOp: case CopyCompositeOp: case ReplaceCompositeOp: case SrcCompositeOp: { if (channel == AlphaPixelChannel) pixel=(MagickRealType) TransparentAlpha; else pixel=0.0; break; } case BlendCompositeOp: case DissolveCompositeOp: { if (channel == AlphaPixelChannel) pixel=canvas_dissolve*(double) GetPixelAlpha(source_image, source); else pixel=(MagickRealType) source[channel]; break; } default: { pixel=(MagickRealType) source[channel]; break; } } q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); } q+=GetPixelChannels(image); continue; } /* Authentic composite: Sa: normalized source alpha. Da: normalized canvas alpha. */ Sa=QuantumScale*(double) GetPixelAlpha(source_image,p); Da=QuantumScale*(double) GetPixelAlpha(image,q); switch (compose) { case BumpmapCompositeOp: case ColorBurnCompositeOp: case ColorDodgeCompositeOp: case DarkenCompositeOp: case DifferenceCompositeOp: case DivideDstCompositeOp: case DivideSrcCompositeOp: case ExclusionCompositeOp: case FreezeCompositeOp: case HardLightCompositeOp: case HardMixCompositeOp: case InterpolateCompositeOp: case LightenCompositeOp: case LinearBurnCompositeOp: case LinearDodgeCompositeOp: case LinearLightCompositeOp: case MathematicsCompositeOp: case MinusDstCompositeOp: case MinusSrcCompositeOp: case MultiplyCompositeOp: case NegateCompositeOp: case OverlayCompositeOp: case PegtopLightCompositeOp: case PinLightCompositeOp: case ReflectCompositeOp: case ScreenCompositeOp: case SoftBurnCompositeOp: case SoftDodgeCompositeOp: case SoftLightCompositeOp: case StampCompositeOp: case VividLightCompositeOp: { alpha=RoundToUnity(Sa+Da-Sa*Da); break; } case DstAtopCompositeOp: case DstInCompositeOp: case InCompositeOp: case SrcInCompositeOp: { alpha=Sa*Da; break; } case DissolveCompositeOp: { alpha=source_dissolve*Sa*(-canvas_dissolve*Da)+source_dissolve*Sa+ canvas_dissolve*Da; break; } case DstOverCompositeOp: case OverCompositeOp: case SrcOverCompositeOp: { alpha=Sa+Da-Sa*Da; break; } case DstOutCompositeOp: { alpha=Da*(1.0-Sa); break; } case OutCompositeOp: case SrcOutCompositeOp: { alpha=Sa*(1.0-Da); break; } case BlendCompositeOp: case PlusCompositeOp: { alpha=RoundToUnity(source_dissolve*Sa+canvas_dissolve*Da); break; } case XorCompositeOp: { alpha=Sa+Da-2.0*Sa*Da; break; } case ModulusAddCompositeOp: { if ((Sa+Da) <= 1.0) { alpha=(Sa+Da); break; } alpha=((Sa+Da)-1.0); break; } case ModulusSubtractCompositeOp: { if ((Sa-Da) >= 0.0) { alpha=(Sa-Da); break; } alpha=((Sa-Da)+1.0); break; } default: { alpha=1.0; break; } } switch (compose) { case ColorizeCompositeOp: case HueCompositeOp: case LuminizeCompositeOp: case ModulateCompositeOp: case RMSECompositeOp: case SaturateCompositeOp: { Si=GetPixelIntensity(source_image,p); GetPixelInfoPixel(source_image,p,&source_pixel); GetPixelInfoPixel(image,q,&canvas_pixel); break; } case BumpmapCompositeOp: case CopyAlphaCompositeOp: case DarkenIntensityCompositeOp: case LightenIntensityCompositeOp: { Si=GetPixelIntensity(source_image,p); Di=GetPixelIntensity(image,q); break; } default: break; } for (i=0; i < (ssize_t) GetPixelChannels(image); i++) { MagickRealType pixel = 0.0, sans = 0.0; PixelChannel channel = GetPixelChannelChannel(image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); PixelTrait source_traits = GetPixelChannelTraits(source_image,channel); if (traits == UndefinedPixelTrait) continue; if ((channel == AlphaPixelChannel) && ((traits & UpdatePixelTrait) != 0)) { /* Set alpha channel. */ switch (compose) { case AlphaCompositeOp: { pixel=(double) QuantumRange*Sa; break; } case AtopCompositeOp: case CopyBlackCompositeOp: case CopyBlueCompositeOp: case CopyCyanCompositeOp: case CopyGreenCompositeOp: case CopyMagentaCompositeOp: case CopyRedCompositeOp: case CopyYellowCompositeOp: case SrcAtopCompositeOp: case DstCompositeOp: case NoCompositeOp: { pixel=(double) QuantumRange*Da; break; } case BumpmapCompositeOp: { pixel=Si*Da; break; } case ChangeMaskCompositeOp: { if (IsFuzzyEquivalencePixel(source_image,p,image,q) != MagickFalse) pixel=(MagickRealType) TransparentAlpha; else pixel=(double) QuantumRange*Da; break; } case ClearCompositeOp: { pixel=(MagickRealType) TransparentAlpha; break; } case ColorizeCompositeOp: case HueCompositeOp: case LuminizeCompositeOp: case RMSECompositeOp: case SaturateCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=(double) QuantumRange*Da; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=(double) QuantumRange*Sa; break; } if (Sa < Da) { pixel=(double) QuantumRange*Da; break; } pixel=(double) QuantumRange*Sa; break; } case CopyAlphaCompositeOp: { if (source_image->alpha_trait == UndefinedPixelTrait) pixel=Si; else pixel=(double) QuantumRange*Sa; break; } case BlurCompositeOp: case CopyCompositeOp: case DisplaceCompositeOp: case DistortCompositeOp: case DstAtopCompositeOp: case ReplaceCompositeOp: case SrcCompositeOp: { pixel=(double) QuantumRange*Sa; break; } case DarkenIntensityCompositeOp: { if (compose_sync == MagickFalse) { pixel=Si < Di? Sa : Da; break; } pixel=Sa*Si < Da*Di ? Sa : Da; break; } case DifferenceCompositeOp: { pixel=(double) QuantumRange*fabs((double) (Sa-Da)); break; } case FreezeCompositeOp: { pixel=(double) QuantumRange*(1.0-(1.0-Sa)*(1.0-Sa)* PerceptibleReciprocal(Da)); if (pixel < 0.0) pixel=0.0; break; } case InterpolateCompositeOp: { pixel=(double) QuantumRange*(0.5-0.25*cos(MagickPI*Sa)-0.25* cos(MagickPI*Da)); break; } case LightenIntensityCompositeOp: { if (compose_sync == MagickFalse) { pixel=Si > Di ? Sa : Da; break; } pixel=Sa*Si > Da*Di ? Sa : Da; break; } case ModulateCompositeOp: { pixel=(double) QuantumRange*Da; break; } case MultiplyCompositeOp: { if (compose_sync == MagickFalse) { pixel=(double) QuantumRange*Sa*Da; break; } pixel=(double) QuantumRange*alpha; break; } case NegateCompositeOp: { pixel=(double) QuantumRange*((1.0-Sa-Da)); break; } case ReflectCompositeOp: { pixel=(double) QuantumRange*(Sa*Sa* PerceptibleReciprocal(1.0-Da)); if (pixel > (double) QuantumRange) pixel=(double) QuantumRange; break; } case StampCompositeOp: { pixel=(double) QuantumRange*(Sa+Da*Da-1.0); break; } case StereoCompositeOp: { pixel=(double) QuantumRange*(Sa+Da)/2; break; } default: { pixel=(double) QuantumRange*alpha; break; } } q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); continue; } if (source_traits == UndefinedPixelTrait) continue; /* Sc: source color. Dc: canvas color. */ Sc=(MagickRealType) GetPixelChannel(source_image,channel,p); Dc=(MagickRealType) q[i]; if ((traits & CopyPixelTrait) != 0) { /* Copy channel. */ q[i]=ClampToQuantum(Dc); continue; } /* Porter-Duff compositions: Sca: source normalized color multiplied by alpha. Dca: normalized canvas color multiplied by alpha. */ Sca=QuantumScale*Sa*Sc; Dca=QuantumScale*Da*Dc; SaSca=Sa*PerceptibleReciprocal(Sca); DcaDa=Dca*PerceptibleReciprocal(Da); switch (compose) { case DarkenCompositeOp: case LightenCompositeOp: case ModulusSubtractCompositeOp: { gamma=PerceptibleReciprocal(1.0-alpha); break; } default: { gamma=PerceptibleReciprocal(alpha); break; } } pixel=Dc; switch (compose) { case AlphaCompositeOp: { pixel=(double) QuantumRange*Sa; break; } case AtopCompositeOp: case SrcAtopCompositeOp: { pixel=(double) QuantumRange*(Sca*Da+Dca*(1.0-Sa)); break; } case BlendCompositeOp: { pixel=gamma*(source_dissolve*Sa*Sc+canvas_dissolve*Da*Dc); break; } case CopyCompositeOp: case ReplaceCompositeOp: case SrcCompositeOp: { pixel=(double) QuantumRange*Sca; break; } case BlurCompositeOp: case DisplaceCompositeOp: case DistortCompositeOp: { pixel=Sc; break; } case BumpmapCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } pixel=(double) QuantumScale*Si*Dc; break; } case ChangeMaskCompositeOp: { pixel=Dc; break; } case ClearCompositeOp: { pixel=0.0; break; } case ColorBurnCompositeOp: { if ((Sca == 0.0) && (Dca == Da)) { pixel=(double) QuantumRange*gamma*(Sa*Da+Dca*(1.0-Sa)); break; } if (Sca == 0.0) { pixel=(double) QuantumRange*gamma*(Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Sa*Da-Sa*Da*MagickMin(1.0, (1.0-DcaDa)*SaSca)+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } case ColorDodgeCompositeOp: { if ((Sca*Da+Dca*Sa) >= Sa*Da) pixel=(double) QuantumRange*gamma*(Sa*Da+Sca*(1.0-Da)+Dca* (1.0-Sa)); else pixel=(double) QuantumRange*gamma*(Dca*Sa*Sa* PerceptibleReciprocal(Sa-Sca)+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } case ColorizeCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=Sc; break; } CompositeHCL(canvas_pixel.red,canvas_pixel.green,canvas_pixel.blue, &sans,&sans,&luma); CompositeHCL(source_pixel.red,source_pixel.green,source_pixel.blue, &hue,&chroma,&sans); HCLComposite(hue,chroma,luma,&red,&green,&blue); switch (channel) { case RedPixelChannel: pixel=red; break; case GreenPixelChannel: pixel=green; break; case BluePixelChannel: pixel=blue; break; default: pixel=Dc; break; } break; } case CopyAlphaCompositeOp: { pixel=Dc; break; } case CopyBlackCompositeOp: { if (channel == BlackPixelChannel) pixel=(MagickRealType) GetPixelBlack(source_image,p); break; } case CopyBlueCompositeOp: case CopyYellowCompositeOp: { if (channel == BluePixelChannel) pixel=(MagickRealType) GetPixelBlue(source_image,p); break; } case CopyGreenCompositeOp: case CopyMagentaCompositeOp: { if (channel == GreenPixelChannel) pixel=(MagickRealType) GetPixelGreen(source_image,p); break; } case CopyRedCompositeOp: case CopyCyanCompositeOp: { if (channel == RedPixelChannel) pixel=(MagickRealType) GetPixelRed(source_image,p); break; } case DarkenCompositeOp: { /* Darken is equivalent to a 'Minimum' method OR a greyscale version of a binary 'Or' OR the 'Intersection' of pixel sets. */ if (compose_sync == MagickFalse) { pixel=MagickMin(Sc,Dc); break; } if ((Sca*Da) < (Dca*Sa)) { pixel=(double) QuantumRange*(Sca+Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*(Dca+Sca*(1.0-Da)); break; } case DarkenIntensityCompositeOp: { if (compose_sync == MagickFalse) { pixel=Si < Di ? Sc : Dc; break; } pixel=Sa*Si < Da*Di ? Sc : Dc; break; } case DifferenceCompositeOp: { if (compose_sync == MagickFalse) { pixel=fabs((double) Sc-Dc); break; } pixel=(double) QuantumRange*gamma*(Sca+Dca-2.0*MagickMin(Sca*Da, Dca*Sa)); break; } case DissolveCompositeOp: { pixel=gamma*(source_dissolve*Sa*Sc-source_dissolve*Sa* canvas_dissolve*Da*Dc+canvas_dissolve*Da*Dc); break; } case DivideDstCompositeOp: { if (compose_sync == MagickFalse) { pixel=(double) QuantumRange*(Sc/PerceptibleReciprocal(Dc)); break; } if ((fabs((double) Sca) < MagickEpsilon) && (fabs((double) Dca) < MagickEpsilon)) { pixel=(double) QuantumRange*gamma*(Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } if (fabs((double) Dca) < MagickEpsilon) { pixel=(double) QuantumRange*gamma*(Sa*Da+Sca*(1.0-Da)+Dca* (1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Sca*Da*Da/Dca+Sca*(1.0-Da)+Dca* (1.0-Sa)); break; } case DivideSrcCompositeOp: { if (compose_sync == MagickFalse) { pixel=(double) QuantumRange*(Dc/PerceptibleReciprocal(Sc)); break; } if ((fabs((double) Dca) < MagickEpsilon) && (fabs((double) Sca) < MagickEpsilon)) { pixel=(double) QuantumRange*gamma*(Dca*(1.0-Sa)+Sca*(1.0-Da)); break; } if (fabs((double) Sca) < MagickEpsilon) { pixel=(double) QuantumRange*gamma*(Da*Sa+Dca*(1.0-Sa)+Sca* (1.0-Da)); break; } pixel=(double) QuantumRange*gamma*(Dca*Sa*SaSca+Dca*(1.0-Sa)+Sca* (1.0-Da)); break; } case DstAtopCompositeOp: { pixel=(double) QuantumRange*(Dca*Sa+Sca*(1.0-Da)); break; } case DstCompositeOp: case NoCompositeOp: { pixel=(double) QuantumRange*Dca; break; } case DstInCompositeOp: { pixel=(double) QuantumRange*gamma*(Dca*Sa); break; } case DstOutCompositeOp: { pixel=(double) QuantumRange*gamma*(Dca*(1.0-Sa)); break; } case DstOverCompositeOp: { pixel=(double) QuantumRange*gamma*(Dca+Sca*(1.0-Da)); break; } case ExclusionCompositeOp: { pixel=(double) QuantumRange*gamma*(Sca*Da+Dca*Sa-2.0*Sca*Dca+Sca* (1.0-Da)+Dca*(1.0-Sa)); break; } case FreezeCompositeOp: { pixel=(double) QuantumRange*gamma*(1.0-(1.0-Sca)*(1.0-Sca)* PerceptibleReciprocal(Dca)); if (pixel < 0.0) pixel=0.0; break; } case HardLightCompositeOp: { if ((2.0*Sca) < Sa) { pixel=(double) QuantumRange*gamma*(2.0*Sca*Dca+Sca*(1.0-Da)+Dca* (1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Sa*Da-2.0*(Da-Dca)*(Sa-Sca)+Sca* (1.0-Da)+Dca*(1.0-Sa)); break; } case HardMixCompositeOp: { pixel=gamma*(((Sca+Dca) < 1.0) ? 0.0 : (double) QuantumRange); break; } case HueCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=Sc; break; } CompositeHCL(canvas_pixel.red,canvas_pixel.green,canvas_pixel.blue, &hue,&chroma,&luma); CompositeHCL(source_pixel.red,source_pixel.green,source_pixel.blue, &hue,&sans,&sans); HCLComposite(hue,chroma,luma,&red,&green,&blue); switch (channel) { case RedPixelChannel: pixel=red; break; case GreenPixelChannel: pixel=green; break; case BluePixelChannel: pixel=blue; break; default: pixel=Dc; break; } break; } case InCompositeOp: case SrcInCompositeOp: { pixel=(double) QuantumRange*(Sca*Da); break; } case InterpolateCompositeOp: { pixel=(double) QuantumRange*(0.5-0.25*cos(MagickPI*Sca)-0.25* cos(MagickPI*Dca)); break; } case LinearBurnCompositeOp: { /* LinearBurn: as defined by Abode Photoshop, according to http://www.simplefilter.de/en/basics/mixmods.html is: f(Sc,Dc) = Sc + Dc - 1 */ pixel=(double) QuantumRange*gamma*(Sca+Dca-Sa*Da); break; } case LinearDodgeCompositeOp: { pixel=gamma*(Sa*Sc+Da*Dc); break; } case LinearLightCompositeOp: { /* LinearLight: as defined by Abode Photoshop, according to http://www.simplefilter.de/en/basics/mixmods.html is: f(Sc,Dc) = Dc + 2*Sc - 1 */ pixel=(double) QuantumRange*gamma*((Sca-Sa)*Da+Sca+Dca); break; } case LightenCompositeOp: { if (compose_sync == MagickFalse) { pixel=MagickMax(Sc,Dc); break; } if ((Sca*Da) > (Dca*Sa)) { pixel=(double) QuantumRange*(Sca+Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*(Dca+Sca*(1.0-Da)); break; } case LightenIntensityCompositeOp: { /* Lighten is equivalent to a 'Maximum' method OR a greyscale version of a binary 'And' OR the 'Union' of pixel sets. */ if (compose_sync == MagickFalse) { pixel=Si > Di ? Sc : Dc; break; } pixel=Sa*Si > Da*Di ? Sc : Dc; break; } case LuminizeCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=Sc; break; } CompositeHCL(canvas_pixel.red,canvas_pixel.green,canvas_pixel.blue, &hue,&chroma,&luma); CompositeHCL(source_pixel.red,source_pixel.green,source_pixel.blue, &sans,&sans,&luma); HCLComposite(hue,chroma,luma,&red,&green,&blue); switch (channel) { case RedPixelChannel: pixel=red; break; case GreenPixelChannel: pixel=green; break; case BluePixelChannel: pixel=blue; break; default: pixel=Dc; break; } break; } case MathematicsCompositeOp: { /* 'Mathematics' a free form user control mathematical composition is defined as... f(Sc,Dc) = A*Sc*Dc + B*Sc + C*Dc + D Where the arguments A,B,C,D are (currently) passed to composite as a command separated 'geometry' string in "compose:args" image artifact. A = a->rho, B = a->sigma, C = a->xi, D = a->psi Applying the SVG transparency formula (see above), we get... Dca' = Sa*Da*f(Sc,Dc) + Sca*(1.0-Da) + Dca*(1.0-Sa) Dca' = A*Sca*Dca + B*Sca*Da + C*Dca*Sa + D*Sa*Da + Sca*(1.0-Da) + Dca*(1.0-Sa) */ if (compose_sync == MagickFalse) { pixel=geometry_info.rho*Sc*Dc+geometry_info.sigma*Sc+ geometry_info.xi*Dc+geometry_info.psi; break; } pixel=(double) QuantumRange*gamma*(geometry_info.rho*Sca*Dca+ geometry_info.sigma*Sca*Da+geometry_info.xi*Dca*Sa+ geometry_info.psi*Sa*Da+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } case MinusDstCompositeOp: { if (compose_sync == MagickFalse) { pixel=Dc-Sc; break; } pixel=gamma*(Sa*Sc+Da*Dc-2.0*Da*Dc*Sa); break; } case MinusSrcCompositeOp: { /* Minus source from canvas. f(Sc,Dc) = Sc - Dc */ if (compose_sync == MagickFalse) { pixel=Sc-Dc; break; } pixel=gamma*(Da*Dc+Sa*Sc-2.0*Sa*Sc*Da); break; } case ModulateCompositeOp: { ssize_t offset; if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } offset=(ssize_t) (Si-midpoint); if (offset == 0) { pixel=Dc; break; } CompositeHCL(canvas_pixel.red,canvas_pixel.green,canvas_pixel.blue, &hue,&chroma,&luma); luma+=(0.01*percent_luma*offset)/midpoint; chroma*=0.01*percent_chroma; HCLComposite(hue,chroma,luma,&red,&green,&blue); switch (channel) { case RedPixelChannel: pixel=red; break; case GreenPixelChannel: pixel=green; break; case BluePixelChannel: pixel=blue; break; default: pixel=Dc; break; } break; } case ModulusAddCompositeOp: { if (compose_sync == MagickFalse) { pixel=(Sc+Dc); break; } if ((Sca+Dca) <= 1.0) { pixel=(double) QuantumRange*(Sca+Dca); break; } pixel=(double) QuantumRange*((Sca+Dca)-1.0); break; } case ModulusSubtractCompositeOp: { if (compose_sync == MagickFalse) { pixel=(Sc-Dc); break; } if ((Sca-Dca) >= 0.0) { pixel=(double) QuantumRange*(Sca-Dca); break; } pixel=(double) QuantumRange*((Sca-Dca)+1.0); break; } case MultiplyCompositeOp: { if (compose_sync == MagickFalse) { pixel=(double) QuantumScale*Dc*Sc; break; } pixel=(double) QuantumRange*gamma*(Sca*Dca+Sca*(1.0-Da)+Dca* (1.0-Sa)); break; } case NegateCompositeOp: { pixel=(double) QuantumRange*(1.0-fabs(1.0-Sca-Dca)); break; } case OutCompositeOp: case SrcOutCompositeOp: { pixel=(double) QuantumRange*(Sca*(1.0-Da)); break; } case OverCompositeOp: case SrcOverCompositeOp: { pixel=(double) QuantumRange*gamma*(Sca+Dca*(1.0-Sa)); break; } case OverlayCompositeOp: { if ((2.0*Dca) < Da) { pixel=(double) QuantumRange*gamma*(2.0*Dca*Sca+Dca*(1.0-Sa)+ Sca*(1.0-Da)); break; } pixel=(double) QuantumRange*gamma*(Da*Sa-2.0*(Sa-Sca)*(Da-Dca)+Dca* (1.0-Sa)+Sca*(1.0-Da)); break; } case PegtopLightCompositeOp: { /* PegTop: A Soft-Light alternative: A continuous version of the Softlight function, producing very similar results. f(Sc,Dc) = Dc^2*(1-2*Sc) + 2*Sc*Dc http://www.pegtop.net/delphi/articles/blendmodes/softlight.htm. */ if (fabs((double) Da) < MagickEpsilon) { pixel=(double) QuantumRange*gamma*Sca; break; } pixel=(double) QuantumRange*gamma*(Dca*Dca*(Sa-2.0*Sca)/Da+Sca* (2.0*Dca+1.0-Da)+Dca*(1.0-Sa)); break; } case PinLightCompositeOp: { /* PinLight: A Photoshop 7 composition method http://www.simplefilter.de/en/basics/mixmods.html f(Sc,Dc) = Dc<2*Sc-1 ? 2*Sc-1 : Dc>2*Sc ? 2*Sc : Dc */ if ((Dca*Sa) < (Da*(2.0*Sca-Sa))) { pixel=(double) QuantumRange*gamma*(Sca*(Da+1.0)-Sa*Da+Dca* (1.0-Sa)); break; } if ((Dca*Sa) > (2.0*Sca*Da)) { pixel=(double) QuantumRange*gamma*(Sca*Da+Sca+Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Sca*(1.0-Da)+Dca); break; } case PlusCompositeOp: { if (compose_sync == MagickFalse) { pixel=(Dc+Sc); break; } pixel=(double) QuantumRange*(Sca+Dca); break; } case ReflectCompositeOp: { pixel=(double) QuantumRange*gamma*(Sca*Sca* PerceptibleReciprocal(1.0-Dca)); if (pixel > (double) QuantumRange) pixel=(double) QuantumRange; break; } case RMSECompositeOp: { double gray; if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=Sc; break; } gray=sqrt( (canvas_pixel.red-source_pixel.red)* (canvas_pixel.red-source_pixel.red)+ (canvas_pixel.green-source_pixel.green)* (canvas_pixel.green-source_pixel.green)+ (canvas_pixel.blue-source_pixel.blue)* (canvas_pixel.blue-source_pixel.blue)/3.0); switch (channel) { case RedPixelChannel: pixel=gray; break; case GreenPixelChannel: pixel=gray; break; case BluePixelChannel: pixel=gray; break; default: pixel=Dc; break; } break; } case SaturateCompositeOp: { if (fabs((double) QuantumRange*Sa-(double) TransparentAlpha) < MagickEpsilon) { pixel=Dc; break; } if (fabs((double) QuantumRange*Da-(double) TransparentAlpha) < MagickEpsilon) { pixel=Sc; break; } CompositeHCL(canvas_pixel.red,canvas_pixel.green,canvas_pixel.blue, &hue,&chroma,&luma); CompositeHCL(source_pixel.red,source_pixel.green,source_pixel.blue, &sans,&chroma,&sans); HCLComposite(hue,chroma,luma,&red,&green,&blue); switch (channel) { case RedPixelChannel: pixel=red; break; case GreenPixelChannel: pixel=green; break; case BluePixelChannel: pixel=blue; break; default: pixel=Dc; break; } break; } case ScreenCompositeOp: { /* Screen: a negated multiply: f(Sc,Dc) = 1.0-(1.0-Sc)*(1.0-Dc) */ if (compose_sync == MagickFalse) { pixel=Sc+Dc-Sc*Dc; break; } pixel=(double) QuantumRange*gamma*(Sca+Dca-Sca*Dca); break; } case SoftBurnCompositeOp: { if ((Sca+Dca) < 1.0) pixel=(double) QuantumRange*gamma*(0.5*Dca* PerceptibleReciprocal(1.0-Sca)); else pixel=(double) QuantumRange*gamma*(1.0-0.5*(1.0-Sca)* PerceptibleReciprocal(Dca)); break; } case SoftDodgeCompositeOp: { if ((Sca+Dca) < 1.0) pixel=(double) QuantumRange*gamma*(0.5*Sca* PerceptibleReciprocal(1.0-Dca)); else pixel=(double) QuantumRange*gamma*(1.0-0.5*(1.0-Dca)* PerceptibleReciprocal(Sca)); break; } case SoftLightCompositeOp: { if ((2.0*Sca) < Sa) { pixel=(double) QuantumRange*gamma*(Dca*(Sa+(2.0*Sca-Sa)* (1.0-DcaDa))+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } if (((2.0*Sca) > Sa) && ((4.0*Dca) <= Da)) { pixel=(double) QuantumRange*gamma*(Dca*Sa+Da*(2.0*Sca-Sa)* (4.0*DcaDa*(4.0*DcaDa+1.0)*(DcaDa-1.0)+7.0*DcaDa)+Sca* (1.0-Da)+Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Dca*Sa+Da*(2.0*Sca-Sa)* (pow(DcaDa,0.5)-DcaDa)+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } case StampCompositeOp: { pixel=(double) QuantumRange*(Sca+Dca*Dca-1.0); break; } case StereoCompositeOp: { if (channel == RedPixelChannel) pixel=(MagickRealType) GetPixelRed(source_image,p); break; } case ThresholdCompositeOp: { MagickRealType delta; delta=Sc-Dc; if ((MagickRealType) fabs((double) (2.0*delta)) < threshold) { pixel=gamma*Dc; break; } pixel=gamma*(Dc+delta*amount); break; } case VividLightCompositeOp: { /* VividLight: A Photoshop 7 composition method. See http://www.simplefilter.de/en/basics/mixmods.html. f(Sc,Dc) = (2*Sc < 1) ? 1-(1-Dc)/(2*Sc) : Dc/(2*(1-Sc)) */ if ((fabs((double) Sa) < MagickEpsilon) || (fabs((double) (Sca-Sa)) < MagickEpsilon)) { pixel=(double) QuantumRange*gamma*(Sa*Da+Sca*(1.0-Da)+Dca* (1.0-Sa)); break; } if ((2.0*Sca) <= Sa) { pixel=(double) QuantumRange*gamma*(Sa*(Da+Sa*(Dca-Da)* PerceptibleReciprocal(2.0*Sca))+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } pixel=(double) QuantumRange*gamma*(Dca*Sa*Sa* PerceptibleReciprocal(2.0*(Sa-Sca))+Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } case XorCompositeOp: { pixel=(double) QuantumRange*(Sca*(1.0-Da)+Dca*(1.0-Sa)); break; } default: { pixel=Sc; break; } } q[i]=clamp != MagickFalse ? ClampPixel(pixel) : ClampToQuantum(pixel); } p+=GetPixelChannels(source_image); channels=GetPixelChannels(source_image); if (p >= (pixels+channels*source_image->columns)) p=pixels; 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 atomic #endif progress++; proceed=SetImageProgress(image,CompositeImageTag,progress,image->rows); if (proceed == MagickFalse) status=MagickFalse; } } source_view=DestroyCacheView(source_view); image_view=DestroyCacheView(image_view); if (canvas_image != (Image * ) NULL) canvas_image=DestroyImage(canvas_image); else source_image=DestroyImage(source_image); return(status); } /* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % T e x t u r e I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % TextureImage() repeatedly tiles the texture image across and down the image % canvas. % % The format of the TextureImage method is: % % MagickBooleanType TextureImage(Image *image,const Image *texture, % ExceptionInfo *exception) % % A description of each parameter follows: % % o image: the image. % % o texture_image: This image is the texture to layer on the background. % */ MagickExport MagickBooleanType TextureImage(Image *image,const Image *texture, ExceptionInfo *exception) { #define TextureImageTag "Texture/Image" CacheView *image_view, *texture_view; Image *texture_image; MagickBooleanType status; ssize_t y; assert(image != (Image *) NULL); assert(image->signature == MagickCoreSignature); if (IsEventLogging() != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); if (texture == (const Image *) NULL) return(MagickFalse); if (SetImageStorageClass(image,DirectClass,exception) == MagickFalse) return(MagickFalse); texture_image=CloneImage(texture,0,0,MagickTrue,exception); if (texture_image == (const Image *) NULL) return(MagickFalse); (void) TransformImageColorspace(texture_image,image->colorspace,exception); (void) SetImageVirtualPixelMethod(texture_image,TileVirtualPixelMethod, exception); status=MagickTrue; if ((image->compose != CopyCompositeOp) && ((image->compose != OverCompositeOp) || (image->alpha_trait != UndefinedPixelTrait) || (texture_image->alpha_trait != UndefinedPixelTrait))) { /* Tile texture onto the image background. */ for (y=0; y < (ssize_t) image->rows; y+=(ssize_t) texture_image->rows) { ssize_t x; if (status == MagickFalse) continue; for (x=0; x < (ssize_t) image->columns; x+=(ssize_t) texture_image->columns) { MagickBooleanType thread_status; thread_status=CompositeImage(image,texture_image,image->compose, MagickTrue,x+texture_image->tile_offset.x,y+ texture_image->tile_offset.y,exception); if (thread_status == MagickFalse) { status=thread_status; break; } } if (image->progress_monitor != (MagickProgressMonitor) NULL) { MagickBooleanType proceed; proceed=SetImageProgress(image,TextureImageTag,(MagickOffsetType) y, image->rows); if (proceed == MagickFalse) status=MagickFalse; } } (void) SetImageProgress(image,TextureImageTag,(MagickOffsetType) image->rows,image->rows); texture_image=DestroyImage(texture_image); return(status); } /* Tile texture onto the image background (optimized). */ status=MagickTrue; texture_view=AcquireVirtualCacheView(texture_image,exception); image_view=AcquireAuthenticCacheView(image,exception); #if defined(MAGICKCORE_OPENMP_SUPPORT) #pragma omp parallel for schedule(static) shared(status) \ magick_number_threads(texture_image,image,image->rows,1) #endif for (y=0; y < (ssize_t) image->rows; y++) { MagickBooleanType sync; const Quantum *p, *pixels; ssize_t x; Quantum *q; size_t width; if (status == MagickFalse) continue; pixels=GetCacheViewVirtualPixels(texture_view,texture_image->tile_offset.x, (y+texture_image->tile_offset.y) % (ssize_t) texture_image->rows, texture_image->columns,1,exception); q=QueueCacheViewAuthenticPixels(image_view,0,y,image->columns,1,exception); if ((pixels == (const Quantum *) NULL) || (q == (Quantum *) NULL)) { status=MagickFalse; continue; } for (x=0; x < (ssize_t) image->columns; x+=(ssize_t) texture_image->columns) { ssize_t j; p=pixels; width=texture_image->columns; if ((x+(ssize_t) width) > (ssize_t) image->columns) width=image->columns-(size_t) x; for (j=0; j < (ssize_t) width; j++) { ssize_t i; for (i=0; i < (ssize_t) GetPixelChannels(texture_image); i++) { PixelChannel channel = GetPixelChannelChannel(texture_image,i); PixelTrait traits = GetPixelChannelTraits(image,channel); PixelTrait texture_traits=GetPixelChannelTraits(texture_image, channel); if ((traits == UndefinedPixelTrait) || (texture_traits == UndefinedPixelTrait)) continue; SetPixelChannel(image,channel,p[i],q); } p+=GetPixelChannels(texture_image); q+=GetPixelChannels(image); } } sync=SyncCacheViewAuthenticPixels(image_view,exception); if (sync == MagickFalse) status=MagickFalse; if (image->progress_monitor != (MagickProgressMonitor) NULL) { MagickBooleanType proceed; proceed=SetImageProgress(image,TextureImageTag,(MagickOffsetType) y, image->rows); if (proceed == MagickFalse) status=MagickFalse; } } texture_view=DestroyCacheView(texture_view); image_view=DestroyCacheView(image_view); texture_image=DestroyImage(texture_image); return(status); }