| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % CCCC H H AAA N N N N EEEEE L % |
| % C H H A A NN N NN N E L % |
| % C HHHHH AAAAA N N N N N N EEE L % |
| % C H H A A N NN N NN E L % |
| % CCCC H H A A N N N N EEEEE LLLLL % |
| % % |
| % % |
| % MagickCore Image Channel Methods % |
| % % |
| % Software Design % |
| % Cristy % |
| % December 2003 % |
| % % |
| % % |
| % Copyright 1999-2016 ImageMagick Studio LLC, a non-profit organization % |
| % dedicated to making software imaging solutions freely available. % |
| % % |
| % You may not use this file except in compliance with the License. You may % |
| % obtain a copy of the License at % |
| % % |
| % http://www.imagemagick.org/script/license.php % |
| % % |
| % Unless required by applicable law or agreed to in writing, software % |
| % distributed under the License is distributed on an "AS IS" BASIS, % |
| % WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. % |
| % See the License for the specific language governing permissions and % |
| % limitations under the License. % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % |
| % |
| */ |
| |
| /* |
| Include declarations. |
| */ |
| #include "MagickCore/studio.h" |
| #include "MagickCore/cache-private.h" |
| #include "MagickCore/channel.h" |
| #include "MagickCore/colorspace-private.h" |
| #include "MagickCore/composite-private.h" |
| #include "MagickCore/enhance.h" |
| #include "MagickCore/image.h" |
| #include "MagickCore/list.h" |
| #include "MagickCore/log.h" |
| #include "MagickCore/monitor.h" |
| #include "MagickCore/monitor-private.h" |
| #include "MagickCore/option.h" |
| #include "MagickCore/pixel-accessor.h" |
| #include "MagickCore/pixel-private.h" |
| #include "MagickCore/resource_.h" |
| #include "MagickCore/string-private.h" |
| #include "MagickCore/thread-private.h" |
| #include "MagickCore/token.h" |
| #include "MagickCore/utility.h" |
| #include "MagickCore/version.h" |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % C h a n n e l F x I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % ChannelFxImage() applies a channel expression to the specified image. The |
| % expression consists of one or more channels, either mnemonic or numeric (e.g. |
| % red, 1), separated by actions as follows: |
| % |
| % <=> exchange two channels (e.g. red<=>blue) |
| % => copy one channel to another channel (e.g. red=>green) |
| % = assign a constant value to a channel (e.g. red=50%) |
| % , write new image channels in the specified order (e.g. red, green) |
| % | add a new output image for the next set of channel operations |
| % ; move to the next input image for the source of channel data |
| % |
| % For example, to create 3 grayscale images from the red, green, and blue |
| % channels of an image, use: |
| % |
| % -channel-fx "red; green; blue" |
| % |
| % A channel without an operation symbol implies separate (i.e, semicolon). |
| % |
| % The format of the ChannelFxImage method is: |
| % |
| % Image *ChannelFxImage(const Image *image,const char *expression, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o expression: A channel expression. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| typedef enum |
| { |
| ExtractChannelOp, |
| AssignChannelOp, |
| ExchangeChannelOp, |
| TransferChannelOp |
| } ChannelFx; |
| |
| static MagickBooleanType ChannelImage(Image *destination_image, |
| const PixelChannel destination_channel,const ChannelFx channel_op, |
| const Image *source_image,const PixelChannel source_channel, |
| const Quantum pixel,ExceptionInfo *exception) |
| { |
| CacheView |
| *source_view, |
| *destination_view; |
| |
| MagickBooleanType |
| status; |
| |
| size_t |
| height, |
| width; |
| |
| ssize_t |
| y; |
| |
| status=MagickTrue; |
| source_view=AcquireVirtualCacheView(source_image,exception); |
| destination_view=AcquireAuthenticCacheView(destination_image,exception); |
| height=MagickMin(source_image->rows,destination_image->rows); |
| width=MagickMin(source_image->columns,destination_image->columns); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(status) \ |
| magick_threads(source_image,source_image,height,1) |
| #endif |
| for (y=0; y < (ssize_t) height; y++) |
| { |
| PixelTrait |
| destination_traits, |
| source_traits; |
| |
| register const Quantum |
| *magick_restrict p; |
| |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| x; |
| |
| if (status == MagickFalse) |
| continue; |
| p=GetCacheViewVirtualPixels(source_view,0,y,source_image->columns,1, |
| exception); |
| q=GetCacheViewAuthenticPixels(destination_view,0,y, |
| destination_image->columns,1,exception); |
| if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL)) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| destination_traits=GetPixelChannelTraits(destination_image, |
| destination_channel); |
| source_traits=GetPixelChannelTraits(source_image,source_channel); |
| if ((destination_traits == UndefinedPixelTrait) || |
| (source_traits == UndefinedPixelTrait)) |
| continue; |
| for (x=0; x < (ssize_t) width; x++) |
| { |
| if (channel_op == AssignChannelOp) |
| SetPixelChannel(destination_image,destination_channel,pixel,q); |
| else |
| SetPixelChannel(destination_image,destination_channel, |
| GetPixelChannel(source_image,source_channel,p),q); |
| p+=GetPixelChannels(source_image); |
| q+=GetPixelChannels(destination_image); |
| } |
| if (SyncCacheViewAuthenticPixels(destination_view,exception) == MagickFalse) |
| status=MagickFalse; |
| } |
| destination_view=DestroyCacheView(destination_view); |
| source_view=DestroyCacheView(source_view); |
| return(status); |
| } |
| |
| MagickExport Image *ChannelFxImage(const Image *image,const char *expression, |
| ExceptionInfo *exception) |
| { |
| #define ChannelFxImageTag "ChannelFx/Image" |
| |
| ChannelFx |
| channel_op; |
| |
| ChannelType |
| channel_mask; |
| |
| char |
| token[MagickPathExtent]; |
| |
| const char |
| *p; |
| |
| const Image |
| *source_image; |
| |
| double |
| pixel; |
| |
| Image |
| *destination_image; |
| |
| MagickBooleanType |
| status; |
| |
| PixelChannel |
| source_channel, |
| destination_channel; |
| |
| ssize_t |
| channels; |
| |
| 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); |
| source_image=image; |
| destination_image=CloneImage(source_image,0,0,MagickTrue,exception); |
| if (destination_image == (Image *) NULL) |
| return((Image *) NULL); |
| if (expression == (const char *) NULL) |
| return(destination_image); |
| destination_channel=RedPixelChannel; |
| channel_mask=UndefinedChannel; |
| pixel=0.0; |
| p=(char *) expression; |
| GetNextToken(p,&p,MagickPathExtent,token); |
| channel_op=ExtractChannelOp; |
| for (channels=0; *token != '\0'; ) |
| { |
| ssize_t |
| i; |
| |
| /* |
| Interpret channel expression. |
| */ |
| switch (*token) |
| { |
| case ',': |
| { |
| GetNextToken(p,&p,MagickPathExtent,token); |
| break; |
| } |
| case '|': |
| { |
| if (GetNextImageInList(source_image) != (Image *) NULL) |
| source_image=GetNextImageInList(source_image); |
| else |
| source_image=GetFirstImageInList(source_image); |
| GetNextToken(p,&p,MagickPathExtent,token); |
| break; |
| } |
| case ';': |
| { |
| Image |
| *canvas; |
| |
| (void) SetPixelChannelMask(destination_image,channel_mask); |
| if ((channel_op == ExtractChannelOp) && (channels == 1)) |
| (void) SetImageColorspace(destination_image,GRAYColorspace,exception); |
| status=SetImageStorageClass(destination_image,DirectClass,exception); |
| if (status == MagickFalse) |
| { |
| destination_image=DestroyImageList(destination_image); |
| return(destination_image); |
| } |
| canvas=CloneImage(source_image,0,0,MagickTrue,exception); |
| if (canvas == (Image *) NULL) |
| { |
| destination_image=DestroyImageList(destination_image); |
| return(destination_image); |
| } |
| AppendImageToList(&destination_image,canvas); |
| destination_image=GetLastImageInList(destination_image); |
| GetNextToken(p,&p,MagickPathExtent,token); |
| channels=0; |
| destination_channel=RedPixelChannel; |
| channel_mask=UndefinedChannel; |
| break; |
| } |
| default: |
| break; |
| } |
| i=ParsePixelChannelOption(token); |
| if (i < 0) |
| { |
| (void) ThrowMagickException(exception,GetMagickModule(),OptionError, |
| "UnrecognizedChannelType","`%s'",token); |
| destination_image=DestroyImageList(destination_image); |
| return(destination_image); |
| } |
| source_channel=(PixelChannel) i; |
| channel_op=ExtractChannelOp; |
| GetNextToken(p,&p,MagickPathExtent,token); |
| if (*token == '<') |
| { |
| channel_op=ExchangeChannelOp; |
| GetNextToken(p,&p,MagickPathExtent,token); |
| } |
| if (*token == '=') |
| { |
| if (channel_op != ExchangeChannelOp) |
| channel_op=AssignChannelOp; |
| GetNextToken(p,&p,MagickPathExtent,token); |
| } |
| if (*token == '>') |
| { |
| if (channel_op != ExchangeChannelOp) |
| channel_op=TransferChannelOp; |
| GetNextToken(p,&p,MagickPathExtent,token); |
| } |
| switch (channel_op) |
| { |
| case AssignChannelOp: |
| { |
| pixel=StringToDoubleInterval(token,(double) QuantumRange+1.0); |
| GetNextToken(p,&p,MagickPathExtent,token); |
| break; |
| } |
| case ExchangeChannelOp: |
| case TransferChannelOp: |
| { |
| i=ParsePixelChannelOption(token); |
| if (i < 0) |
| { |
| (void) ThrowMagickException(exception,GetMagickModule(),OptionError, |
| "UnrecognizedChannelType","`%s'",token); |
| destination_image=DestroyImageList(destination_image); |
| return(destination_image); |
| } |
| destination_channel=(PixelChannel) i; |
| switch (destination_channel) |
| { |
| case RedPixelChannel: |
| case GreenPixelChannel: |
| case BluePixelChannel: |
| case BlackPixelChannel: |
| case IndexPixelChannel: |
| break; |
| case AlphaPixelChannel: |
| { |
| destination_image->alpha_trait=BlendPixelTrait; |
| break; |
| } |
| case ReadMaskPixelChannel: |
| { |
| destination_image->read_mask=MagickTrue; |
| break; |
| } |
| case WriteMaskPixelChannel: |
| { |
| destination_image->write_mask=MagickTrue; |
| break; |
| } |
| case MetaPixelChannel: |
| default: |
| { |
| (void) SetPixelMetaChannels(destination_image,(size_t) (i- |
| GetPixelChannels(destination_image)+1),exception); |
| break; |
| } |
| } |
| channel_mask=(ChannelType) (channel_mask | ParseChannelOption(token)); |
| if (((channels >= 1) || (destination_channel >= 1)) && |
| (IsGrayColorspace(destination_image->colorspace) != MagickFalse)) |
| (void) SetImageColorspace(destination_image,sRGBColorspace,exception); |
| GetNextToken(p,&p,MagickPathExtent,token); |
| break; |
| } |
| default: |
| break; |
| } |
| status=ChannelImage(destination_image,destination_channel,channel_op, |
| source_image,source_channel,ClampToQuantum(pixel),exception); |
| if (status == MagickFalse) |
| { |
| destination_image=DestroyImageList(destination_image); |
| break; |
| } |
| channels++; |
| if (channel_op == ExchangeChannelOp) |
| { |
| status=ChannelImage(destination_image,source_channel,channel_op, |
| source_image,destination_channel,ClampToQuantum(pixel),exception); |
| if (status == MagickFalse) |
| { |
| destination_image=DestroyImageList(destination_image); |
| break; |
| } |
| channels++; |
| } |
| switch (channel_op) |
| { |
| case ExtractChannelOp: |
| { |
| channel_mask=(ChannelType) (channel_mask | (1 << destination_channel)); |
| destination_channel=(PixelChannel) (destination_channel+1); |
| break; |
| } |
| default: |
| break; |
| } |
| status=SetImageProgress(source_image,ChannelFxImageTag,p-expression, |
| strlen(expression)); |
| if (status == MagickFalse) |
| break; |
| } |
| (void) SetPixelChannelMask(destination_image,channel_mask); |
| if ((channel_op == ExtractChannelOp) && (channels == 1)) |
| (void) SetImageColorspace(destination_image,GRAYColorspace,exception); |
| status=SetImageStorageClass(destination_image,DirectClass,exception); |
| if (status == MagickFalse) |
| { |
| destination_image=GetLastImageInList(destination_image); |
| return((Image *) NULL); |
| } |
| return(GetFirstImageInList(destination_image)); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % C o m b i n e I m a g e s % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % CombineImages() combines one or more images into a single image. The |
| % grayscale value of the pixels of each image in the sequence is assigned in |
| % order to the specified channels of the combined image. The typical |
| % ordering would be image 1 => Red, 2 => Green, 3 => Blue, etc. |
| % |
| % The format of the CombineImages method is: |
| % |
| % Image *CombineImages(const Image *images,const ColorspaceType colorspace, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o images: the image sequence. |
| % |
| % o colorspace: the image colorspace. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport Image *CombineImages(const Image *image, |
| const ColorspaceType colorspace,ExceptionInfo *exception) |
| { |
| #define CombineImageTag "Combine/Image" |
| |
| CacheView |
| *combine_view; |
| |
| Image |
| *combine_image; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| progress; |
| |
| ssize_t |
| y; |
| |
| /* |
| Ensure the image are the same size. |
| */ |
| 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); |
| combine_image=CloneImage(image,0,0,MagickTrue,exception); |
| if (combine_image == (Image *) NULL) |
| return((Image *) NULL); |
| if (SetImageStorageClass(combine_image,DirectClass,exception) == MagickFalse) |
| { |
| combine_image=DestroyImage(combine_image); |
| return((Image *) NULL); |
| } |
| if ((colorspace == UndefinedColorspace) || (image->number_channels == 1)) |
| (void) SetImageColorspace(combine_image,sRGBColorspace,exception); |
| else |
| (void) SetImageColorspace(combine_image,colorspace,exception); |
| if ((GetPixelAlphaTraits(image) & UpdatePixelTrait) != 0) |
| combine_image->alpha_trait=BlendPixelTrait; |
| /* |
| Combine images. |
| */ |
| status=MagickTrue; |
| progress=0; |
| combine_view=AcquireAuthenticCacheView(combine_image,exception); |
| for (y=0; y < (ssize_t) combine_image->rows; y++) |
| { |
| CacheView |
| *image_view; |
| |
| const Image |
| *next; |
| |
| Quantum |
| *pixels; |
| |
| register const Quantum |
| *magick_restrict p; |
| |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| i; |
| |
| if (status == MagickFalse) |
| continue; |
| pixels=GetCacheViewAuthenticPixels(combine_view,0,y,combine_image->columns, |
| 1,exception); |
| if (pixels == (Quantum *) NULL) |
| { |
| status=MagickFalse; |
| continue; |
| } |
| next=image; |
| for (i=0; i < (ssize_t) GetPixelChannels(combine_image); i++) |
| { |
| register ssize_t |
| x; |
| |
| PixelChannel channel=GetPixelChannelChannel(combine_image,i); |
| PixelTrait traits=GetPixelChannelTraits(combine_image,channel); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| if (next == (Image *) NULL) |
| continue; |
| image_view=AcquireVirtualCacheView(next,exception); |
| p=GetCacheViewVirtualPixels(image_view,0,y,next->columns,1,exception); |
| if (p == (const Quantum *) NULL) |
| continue; |
| q=pixels; |
| for (x=0; x < (ssize_t) combine_image->columns; x++) |
| { |
| if (x < (ssize_t) next->columns) |
| { |
| q[i]=GetPixelGray(next,p); |
| p+=GetPixelChannels(next); |
| } |
| q+=GetPixelChannels(combine_image); |
| } |
| image_view=DestroyCacheView(image_view); |
| next=GetNextImageInList(next); |
| } |
| if (SyncCacheViewAuthenticPixels(combine_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| proceed=SetImageProgress(image,CombineImageTag,progress++, |
| combine_image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| combine_view=DestroyCacheView(combine_view); |
| if (status == MagickFalse) |
| combine_image=DestroyImage(combine_image); |
| return(combine_image); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % G e t I m a g e A l p h a C h a n n e l % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % GetImageAlphaChannel() returns MagickFalse if the image alpha channel is |
| % not activated. That is, the image is RGB rather than RGBA or CMYK rather |
| % than CMYKA. |
| % |
| % The format of the GetImageAlphaChannel method is: |
| % |
| % MagickBooleanType GetImageAlphaChannel(const Image *image) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| */ |
| MagickExport MagickBooleanType GetImageAlphaChannel(const Image *image) |
| { |
| assert(image != (const Image *) NULL); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| assert(image->signature == MagickCoreSignature); |
| return(image->alpha_trait != UndefinedPixelTrait ? MagickTrue : MagickFalse); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % S e p a r a t e I m a g e % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % SeparateImage() separates a channel from the image and returns it as a |
| % grayscale image. |
| % |
| % The format of the SeparateImage method is: |
| % |
| % Image *SeparateImage(const Image *image,const ChannelType channel, |
| % ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o channel: the image channel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport Image *SeparateImage(const Image *image, |
| const ChannelType channel_type,ExceptionInfo *exception) |
| { |
| #define GetChannelBit(mask,bit) (((size_t) (mask) >> (size_t) (bit)) & 0x01) |
| #define SeparateImageTag "Separate/Image" |
| |
| CacheView |
| *image_view, |
| *separate_view; |
| |
| Image |
| *separate_image; |
| |
| MagickBooleanType |
| status; |
| |
| MagickOffsetType |
| progress; |
| |
| ssize_t |
| y; |
| |
| /* |
| Initialize separate 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); |
| separate_image=CloneImage(image,image->columns,image->rows,MagickTrue, |
| exception); |
| if (separate_image == (Image *) NULL) |
| return((Image *) NULL); |
| if (SetImageStorageClass(separate_image,DirectClass,exception) == MagickFalse) |
| { |
| separate_image=DestroyImage(separate_image); |
| return((Image *) NULL); |
| } |
| (void) SetImageColorspace(separate_image,GRAYColorspace,exception); |
| separate_image->alpha_trait=UndefinedPixelTrait; |
| /* |
| Separate image. |
| */ |
| status=MagickTrue; |
| progress=0; |
| image_view=AcquireVirtualCacheView(image,exception); |
| separate_view=AcquireAuthenticCacheView(separate_image,exception); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(progress,status) \ |
| magick_threads(image,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(separate_view,0,y,separate_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; |
| |
| if (GetPixelReadMask(image,p) == 0) |
| { |
| SetPixelBackgoundColor(separate_image,q); |
| p+=GetPixelChannels(image); |
| q+=GetPixelChannels(separate_image); |
| continue; |
| } |
| SetPixelChannel(separate_image,GrayPixelChannel,0,q); |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelChannel channel=GetPixelChannelChannel(image,i); |
| PixelTrait traits=GetPixelChannelTraits(image,channel); |
| if ((traits == UndefinedPixelTrait) || |
| (GetChannelBit(channel_type,channel) == 0)) |
| continue; |
| SetPixelChannel(separate_image,GrayPixelChannel,p[i],q); |
| } |
| p+=GetPixelChannels(image); |
| q+=GetPixelChannels(separate_image); |
| } |
| if (SyncCacheViewAuthenticPixels(separate_view,exception) == MagickFalse) |
| status=MagickFalse; |
| if (image->progress_monitor != (MagickProgressMonitor) NULL) |
| { |
| MagickBooleanType |
| proceed; |
| |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp critical (MagickCore_SeparateImage) |
| #endif |
| proceed=SetImageProgress(image,SeparateImageTag,progress++,image->rows); |
| if (proceed == MagickFalse) |
| status=MagickFalse; |
| } |
| } |
| separate_view=DestroyCacheView(separate_view); |
| image_view=DestroyCacheView(image_view); |
| (void) SetImageChannelMask(separate_image,DefaultChannels); |
| if (status == MagickFalse) |
| separate_image=DestroyImage(separate_image); |
| return(separate_image); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % S e p a r a t e I m a g e s % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % SeparateImages() returns a separate grayscale image for each channel |
| % specified. |
| % |
| % The format of the SeparateImages method is: |
| % |
| % Image *SeparateImages(const Image *image,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| MagickExport Image *SeparateImages(const Image *image,ExceptionInfo *exception) |
| { |
| Image |
| *images, |
| *separate_image; |
| |
| register ssize_t |
| i; |
| |
| assert(image != (Image *) NULL); |
| assert(image->signature == MagickCoreSignature); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename); |
| images=NewImageList(); |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelChannel channel=GetPixelChannelChannel(image,i); |
| PixelTrait traits=GetPixelChannelTraits(image,channel); |
| if ((traits == UndefinedPixelTrait) || |
| ((traits & UpdatePixelTrait) == 0)) |
| continue; |
| separate_image=SeparateImage(image,(ChannelType) (1 << channel),exception); |
| if (separate_image != (Image *) NULL) |
| AppendImageToList(&images,separate_image); |
| } |
| if (images == (Image *) NULL) |
| images=SeparateImage(image,UndefinedChannel,exception); |
| return(images); |
| } |
| |
| /* |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % % |
| % % |
| % % |
| % S e t I m a g e A l p h a C h a n n e l % |
| % % |
| % % |
| % % |
| %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% |
| % |
| % SetImageAlphaChannel() activates, deactivates, resets, or sets the alpha |
| % channel. |
| % |
| % The format of the SetImageAlphaChannel method is: |
| % |
| % MagickBooleanType SetImageAlphaChannel(Image *image, |
| % const AlphaChannelOption alpha_type,ExceptionInfo *exception) |
| % |
| % A description of each parameter follows: |
| % |
| % o image: the image. |
| % |
| % o alpha_type: The alpha channel type: ActivateAlphaChannel, |
| % AssociateAlphaChannel, CopyAlphaChannel, DeactivateAlphaChannel, |
| % DisassociateAlphaChannel, ExtractAlphaChannel, OffAlphaChannel, |
| % OnAlphaChannel, OpaqueAlphaChannel, SetAlphaChannel, ShapeAlphaChannel, |
| % and TransparentAlphaChannel. |
| % |
| % o exception: return any errors or warnings in this structure. |
| % |
| */ |
| |
| static inline void FlattenPixelInfo(const Image *image,const PixelInfo *p, |
| const double alpha,const Quantum *q,const double beta, |
| Quantum *composite) |
| { |
| double |
| Da, |
| gamma, |
| Sa; |
| |
| register ssize_t |
| i; |
| |
| /* |
| Compose pixel p over pixel q with the given alpha. |
| */ |
| Sa=QuantumScale*alpha; |
| Da=QuantumScale*beta, |
| gamma=Sa*(-Da)+Sa+Da; |
| gamma=PerceptibleReciprocal(gamma); |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelChannel channel=GetPixelChannelChannel(image,i); |
| PixelTrait traits=GetPixelChannelTraits(image,channel); |
| if (traits == UndefinedPixelTrait) |
| continue; |
| switch (channel) |
| { |
| case RedPixelChannel: |
| { |
| composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta, |
| (double) p->red,alpha)); |
| break; |
| } |
| case GreenPixelChannel: |
| { |
| composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta, |
| (double) p->green,alpha)); |
| break; |
| } |
| case BluePixelChannel: |
| { |
| composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta, |
| (double) p->blue,alpha)); |
| break; |
| } |
| case BlackPixelChannel: |
| { |
| composite[i]=ClampToQuantum(gamma*MagickOver_((double) q[i],beta, |
| (double) p->black,alpha)); |
| break; |
| } |
| case AlphaPixelChannel: |
| { |
| composite[i]=ClampToQuantum(QuantumRange*(Sa*(-Da)+Sa+Da)); |
| break; |
| } |
| default: |
| break; |
| } |
| } |
| } |
| |
| MagickExport MagickBooleanType SetImageAlphaChannel(Image *image, |
| const AlphaChannelOption alpha_type,ExceptionInfo *exception) |
| { |
| CacheView |
| *image_view; |
| |
| MagickBooleanType |
| status; |
| |
| ssize_t |
| y; |
| |
| assert(image != (Image *) NULL); |
| if (image->debug != MagickFalse) |
| (void) LogMagickEvent(TraceEvent,GetMagickModule(),"..."); |
| assert(image->signature == MagickCoreSignature); |
| status=MagickTrue; |
| switch (alpha_type) |
| { |
| case ActivateAlphaChannel: |
| { |
| image->alpha_trait=BlendPixelTrait; |
| break; |
| } |
| case AssociateAlphaChannel: |
| { |
| /* |
| Associate alpha. |
| */ |
| status=SetImageStorageClass(image,DirectClass,exception); |
| if (status == MagickFalse) |
| break; |
| image_view=AcquireAuthenticCacheView(image,exception); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(status) \ |
| magick_threads(image,image,image->rows,1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| x; |
| |
| 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++) |
| { |
| double |
| gamma; |
| |
| register ssize_t |
| i; |
| |
| if (GetPixelReadMask(image,q) == 0) |
| { |
| q+=GetPixelChannels(image); |
| continue; |
| } |
| gamma=QuantumScale*GetPixelAlpha(image,q); |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelChannel channel=GetPixelChannelChannel(image,i); |
| PixelTrait traits=GetPixelChannelTraits(image,channel); |
| if (channel == AlphaPixelChannel) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| q[i]=ClampToQuantum(gamma*q[i]); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| } |
| image_view=DestroyCacheView(image_view); |
| image->alpha_trait=CopyPixelTrait; |
| return(status); |
| } |
| case BackgroundAlphaChannel: |
| { |
| /* |
| Set transparent pixels to background color. |
| */ |
| if (image->alpha_trait == UndefinedPixelTrait) |
| break; |
| status=SetImageStorageClass(image,DirectClass,exception); |
| if (status == MagickFalse) |
| break; |
| image_view=AcquireAuthenticCacheView(image,exception); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(status) \ |
| magick_threads(image,image,image->rows,1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| x; |
| |
| 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++) |
| { |
| if (GetPixelAlpha(image,q) == TransparentAlpha) |
| { |
| SetPixelViaPixelInfo(image,&image->background_color,q); |
| SetPixelChannel(image,AlphaPixelChannel,TransparentAlpha,q); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| } |
| image_view=DestroyCacheView(image_view); |
| return(status); |
| } |
| case CopyAlphaChannel: |
| case ShapeAlphaChannel: |
| { |
| /* |
| Copy pixel intensity to the alpha channel. |
| */ |
| image->alpha_trait=UpdatePixelTrait; |
| status=CompositeImage(image,image,IntensityCompositeOp,MagickTrue,0,0, |
| exception); |
| if (alpha_type == ShapeAlphaChannel) |
| (void) LevelImageColors(image,&image->background_color, |
| &image->background_color,MagickTrue,exception); |
| break; |
| } |
| case DeactivateAlphaChannel: |
| { |
| if (image->alpha_trait == UndefinedPixelTrait) |
| status=SetImageAlpha(image,OpaqueAlpha,exception); |
| image->alpha_trait=CopyPixelTrait; |
| break; |
| } |
| case DisassociateAlphaChannel: |
| { |
| /* |
| Disassociate alpha. |
| */ |
| status=SetImageStorageClass(image,DirectClass,exception); |
| if (status == MagickFalse) |
| break; |
| image->alpha_trait=BlendPixelTrait; |
| image_view=AcquireAuthenticCacheView(image,exception); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(status) \ |
| magick_threads(image,image,image->rows,1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| x; |
| |
| 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++) |
| { |
| double |
| gamma, |
| Sa; |
| |
| register ssize_t |
| i; |
| |
| if (GetPixelReadMask(image,q) == 0) |
| { |
| q+=GetPixelChannels(image); |
| continue; |
| } |
| Sa=QuantumScale*GetPixelAlpha(image,q); |
| gamma=PerceptibleReciprocal(Sa); |
| for (i=0; i < (ssize_t) GetPixelChannels(image); i++) |
| { |
| PixelChannel channel=GetPixelChannelChannel(image,i); |
| PixelTrait traits=GetPixelChannelTraits(image,channel); |
| if (channel == AlphaPixelChannel) |
| continue; |
| if ((traits & UpdatePixelTrait) == 0) |
| continue; |
| q[i]=ClampToQuantum(gamma*q[i]); |
| } |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| } |
| image_view=DestroyCacheView(image_view); |
| image->alpha_trait=UndefinedPixelTrait; |
| return(status); |
| } |
| case DiscreteAlphaChannel: |
| { |
| if (image->alpha_trait == UndefinedPixelTrait) |
| status=SetImageAlpha(image,OpaqueAlpha,exception); |
| image->alpha_trait=UpdatePixelTrait; |
| break; |
| } |
| case ExtractAlphaChannel: |
| { |
| status=CompositeImage(image,image,AlphaCompositeOp,MagickTrue,0,0, |
| exception); |
| image->alpha_trait=UndefinedPixelTrait; |
| break; |
| } |
| case OffAlphaChannel: |
| { |
| image->alpha_trait=UndefinedPixelTrait; |
| break; |
| } |
| case OnAlphaChannel: |
| { |
| if (image->alpha_trait == UndefinedPixelTrait) |
| status=SetImageAlpha(image,OpaqueAlpha,exception); |
| image->alpha_trait=BlendPixelTrait; |
| break; |
| } |
| case OpaqueAlphaChannel: |
| { |
| status=SetImageAlpha(image,OpaqueAlpha,exception); |
| break; |
| } |
| case RemoveAlphaChannel: |
| { |
| /* |
| Remove transparency. |
| */ |
| if (image->alpha_trait == UndefinedPixelTrait) |
| break; |
| status=SetImageStorageClass(image,DirectClass,exception); |
| if (status == MagickFalse) |
| break; |
| image_view=AcquireAuthenticCacheView(image,exception); |
| #if defined(MAGICKCORE_OPENMP_SUPPORT) |
| #pragma omp parallel for schedule(static,4) shared(status) \ |
| magick_threads(image,image,image->rows,1) |
| #endif |
| for (y=0; y < (ssize_t) image->rows; y++) |
| { |
| register Quantum |
| *magick_restrict q; |
| |
| register ssize_t |
| x; |
| |
| 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++) |
| { |
| FlattenPixelInfo(image,&image->background_color, |
| image->background_color.alpha,q,(double) |
| GetPixelAlpha(image,q),q); |
| q+=GetPixelChannels(image); |
| } |
| if (SyncCacheViewAuthenticPixels(image_view,exception) == MagickFalse) |
| status=MagickFalse; |
| } |
| image_view=DestroyCacheView(image_view); |
| image->alpha_trait=image->background_color.alpha_trait; |
| break; |
| } |
| case SetAlphaChannel: |
| { |
| if (image->alpha_trait == UndefinedPixelTrait) |
| status=SetImageAlpha(image,OpaqueAlpha,exception); |
| break; |
| } |
| case TransparentAlphaChannel: |
| { |
| status=SetImageAlpha(image,TransparentAlpha,exception); |
| break; |
| } |
| case UndefinedAlphaChannel: |
| break; |
| } |
| if (status == MagickFalse) |
| return(status); |
| (void) SetPixelChannelMask(image,image->channel_mask); |
| return(SyncImagePixelCache(image,exception)); |
| } |
