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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% M M AAA SSSSS K K %
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% MM MM A A SS K K %
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% M M M AAAAA SSS KKK %
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% M M A A SS K K %
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% M M A A SSSSS K K %
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% %
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% %
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% Write Mask File. %
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% %
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% Software Design %
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% Cristy %
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% July 1992 %
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% %
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% %
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% Copyright 1999-2021 ImageMagick Studio LLC, a non-profit organization %
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% dedicated to making software imaging solutions freely available. %
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% %
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% You may not use this file except in compliance with the License. You may %
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% obtain a copy of the License at %
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% %
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% https://imagemagick.org/script/license.php %
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% %
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% Unless required by applicable law or agreed to in writing, software %
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% distributed under the License is distributed on an "AS IS" BASIS, %
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% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
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% See the License for the specific language governing permissions and %
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% limitations under the License. %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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%
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*/
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/*
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Include declarations.
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*/
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#include "MagickCore/studio.h"
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#include "MagickCore/attribute.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/constitute.h"
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#include "MagickCore/enhance.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/module.h"
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteMASKImage(const ImageInfo *,Image *,ExceptionInfo *);
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e a d M A S K I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadMASKImage returns the image mask associated with the image.
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%
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% The format of the ReadMASKImage method is:
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%
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% Image *ReadMASKImage(const ImageInfo *image_info,
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% ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadMASKImage(const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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Image
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*image;
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ImageInfo
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*read_info;
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/*
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Initialize Image structure.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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read_info=CloneImageInfo(image_info);
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SetImageInfoBlob(read_info,(void *) NULL,0);
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(void) CopyMagickString(read_info->magick,"MIFF",MagickPathExtent);
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image=ReadImage(read_info,exception);
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read_info=DestroyImageInfo(read_info);
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if (image != (Image *) NULL)
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{
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MagickBooleanType
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status;
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status=GrayscaleImage(image,image->intensity,exception);
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if (status == MagickFalse)
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image=DestroyImage(image);
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}
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return(GetFirstImageInList(image));
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% R e g i s t e r M A S K I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterMASKImage() adds attributes for the MASK image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterMASKImage method is:
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%
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% size_t RegisterMASKImage(void)
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%
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*/
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ModuleExport size_t RegisterMASKImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("MASK","MASK","Image Clip Mask");
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entry->decoder=(DecodeImageHandler *) ReadMASKImage;
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entry->encoder=(EncodeImageHandler *) WriteMASKImage;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% U n r e g i s t e r M A S K I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterMASKImage() removes format registrations made by the
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% MASK module from the list of supported formats.
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%
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% The format of the UnregisterMASKImage method is:
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%
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% UnregisterMASKImage(void)
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%
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*/
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ModuleExport void UnregisterMASKImage(void)
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{
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(void) UnregisterMagickInfo("MASK");
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}
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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% W r i t e M A S K I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% WriteMASKImage() writes an image mask to a file.
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%
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% The format of the WriteMASKImage method is:
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%
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% MagickBooleanType WriteMASKImage(const ImageInfo *image_info,
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% Image *image,ExceptionInfo *exception)
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%
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% A description of each parameter follows.
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%
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% o image_info: the image info.
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%
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% o image: The image.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *MaskImage(const Image *image,ExceptionInfo *exception)
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{
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CacheView
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*image_view,
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*mask_view;
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Image
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*mask_image;
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MagickBooleanType
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status;
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ssize_t
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y;
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mask_image=CloneImage(image,0,0,MagickTrue,exception);
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if (mask_image == (Image *) NULL)
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return((Image *) NULL);
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if (SetImageStorageClass(mask_image,DirectClass,exception) == MagickFalse)
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{
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mask_image=DestroyImage(mask_image);
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return((Image *) NULL);
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}
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mask_image->alpha_trait=UndefinedPixelTrait;
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(void) SetImageColorspace(mask_image,GRAYColorspace,exception);
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/*
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Mask image.
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*/
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status=MagickTrue;
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image_view=AcquireVirtualCacheView(image,exception);
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mask_view=AcquireAuthenticCacheView(mask_image,exception);
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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const Quantum
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*magick_restrict p;
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Quantum
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*magick_restrict q;
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ssize_t
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x;
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if (status == MagickFalse)
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continue;
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p=GetCacheViewVirtualPixels(image_view,0,y,image->columns,1,exception);
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q=QueueCacheViewAuthenticPixels(mask_view,0,y,mask_image->columns,1,
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exception);
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if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
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{
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status=MagickFalse;
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continue;
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}
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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SetPixelChannel(mask_image,GrayPixelChannel,0,q);
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SetPixelChannel(mask_image,GrayPixelChannel,GetPixelWriteMask(image,p),q);
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p+=GetPixelChannels(image);
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q+=GetPixelChannels(mask_image);
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}
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if (SyncCacheViewAuthenticPixels(mask_view,exception) == MagickFalse)
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status=MagickFalse;
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}
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mask_view=DestroyCacheView(mask_view);
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image_view=DestroyCacheView(image_view);
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if (status == MagickFalse)
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mask_image=DestroyImage(mask_image);
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return(mask_image);
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}
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static MagickBooleanType WriteMASKImage(const ImageInfo *image_info,
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Image *image,ExceptionInfo *exception)
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{
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Image
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*mask_image;
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ImageInfo
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*write_info;
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MagickBooleanType
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status;
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mask_image=MaskImage(image,exception);
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if (mask_image == (Image *) NULL)
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return(MagickFalse);
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(void) CopyMagickString(mask_image->filename,image->filename,
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MagickPathExtent);
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write_info=CloneImageInfo(image_info);
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*write_info->magick='\0';
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(void) SetImageInfo(write_info,1,exception);
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if ((*write_info->magick == '\0') ||
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(LocaleCompare(write_info->magick,"MASK") == 0))
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(void) FormatLocaleString(mask_image->filename,MagickPathExtent,"miff:%s",
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write_info->filename);
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status=WriteImage(write_info,mask_image,exception);
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mask_image=DestroyImage(mask_image);
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write_info=DestroyImageInfo(write_info);
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return(status);
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}
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