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/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% M M AAA SSSSS K K %
% MM MM A A SS K K %
% M M M AAAAA SSS KKK %
% M M A A SS K K %
% M M A A SSSSS K K %
% %
% %
% Write Mask File. %
% %
% Software Design %
% Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2021 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/attribute.h"
#include "MagickCore/blob.h"
#include "MagickCore/blob-private.h"
#include "MagickCore/constitute.h"
#include "MagickCore/enhance.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/list.h"
#include "MagickCore/magick.h"
#include "MagickCore/memory_.h"
#include "MagickCore/monitor.h"
#include "MagickCore/monitor-private.h"
#include "MagickCore/pixel-accessor.h"
#include "MagickCore/quantum-private.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/module.h"
/*
Forward declarations.
*/
static MagickBooleanType
WriteMASKImage(const ImageInfo *,Image *,ExceptionInfo *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d M A S K I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadMASKImage returns the image mask associated with the image.
%
% The format of the ReadMASKImage method is:
%
% Image *ReadMASKImage(const ImageInfo *image_info,
% ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image_info: the image info.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *ReadMASKImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
ImageInfo
*read_info;
/*
Initialize Image structure.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
read_info=CloneImageInfo(image_info);
SetImageInfoBlob(read_info,(void *) NULL,0);
(void) CopyMagickString(read_info->magick,"MIFF",MagickPathExtent);
image=ReadImage(read_info,exception);
read_info=DestroyImageInfo(read_info);
if (image != (Image *) NULL)
{
MagickBooleanType
status;
status=GrayscaleImage(image,image->intensity,exception);
if (status == MagickFalse)
image=DestroyImage(image);
}
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r M A S K I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterMASKImage() adds attributes for the MASK image format to
% the list of supported formats. The attributes include the image format
% tag, a method to read and/or write the format, whether the format
% supports the saving of more than one frame to the same file or blob,
% whether the format supports native in-memory I/O, and a brief
% description of the format.
%
% The format of the RegisterMASKImage method is:
%
% size_t RegisterMASKImage(void)
%
*/
ModuleExport size_t RegisterMASKImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("MASK","MASK","Image Clip Mask");
entry->decoder=(DecodeImageHandler *) ReadMASKImage;
entry->encoder=(EncodeImageHandler *) WriteMASKImage;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r M A S K I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterMASKImage() removes format registrations made by the
% MASK module from the list of supported formats.
%
% The format of the UnregisterMASKImage method is:
%
% UnregisterMASKImage(void)
%
*/
ModuleExport void UnregisterMASKImage(void)
{
(void) UnregisterMagickInfo("MASK");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e M A S K I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteMASKImage() writes an image mask to a file.
%
% The format of the WriteMASKImage method is:
%
% MagickBooleanType WriteMASKImage(const ImageInfo *image_info,
% Image *image,ExceptionInfo *exception)
%
% A description of each parameter follows.
%
% o image_info: the image info.
%
% o image: The image.
%
% o exception: return any errors or warnings in this structure.
%
*/
static Image *MaskImage(const Image *image,ExceptionInfo *exception)
{
CacheView
*image_view,
*mask_view;
Image
*mask_image;
MagickBooleanType
status;
ssize_t
y;
mask_image=CloneImage(image,0,0,MagickTrue,exception);
if (mask_image == (Image *) NULL)
return((Image *) NULL);
if (SetImageStorageClass(mask_image,DirectClass,exception) == MagickFalse)
{
mask_image=DestroyImage(mask_image);
return((Image *) NULL);
}
mask_image->alpha_trait=UndefinedPixelTrait;
(void) SetImageColorspace(mask_image,GRAYColorspace,exception);
/*
Mask image.
*/
status=MagickTrue;
image_view=AcquireVirtualCacheView(image,exception);
mask_view=AcquireAuthenticCacheView(mask_image,exception);
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(image_view,0,y,image->columns,1,exception);
q=QueueCacheViewAuthenticPixels(mask_view,0,y,mask_image->columns,1,
exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
{
status=MagickFalse;
continue;
}
for (x=0; x < (ssize_t) image->columns; x++)
{
SetPixelChannel(mask_image,GrayPixelChannel,0,q);
SetPixelChannel(mask_image,GrayPixelChannel,GetPixelWriteMask(image,p),q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(mask_image);
}
if (SyncCacheViewAuthenticPixels(mask_view,exception) == MagickFalse)
status=MagickFalse;
}
mask_view=DestroyCacheView(mask_view);
image_view=DestroyCacheView(image_view);
if (status == MagickFalse)
mask_image=DestroyImage(mask_image);
return(mask_image);
}
static MagickBooleanType WriteMASKImage(const ImageInfo *image_info,
Image *image,ExceptionInfo *exception)
{
Image
*mask_image;
ImageInfo
*write_info;
MagickBooleanType
status;
mask_image=MaskImage(image,exception);
if (mask_image == (Image *) NULL)
return(MagickFalse);
(void) CopyMagickString(mask_image->filename,image->filename,
MagickPathExtent);
write_info=CloneImageInfo(image_info);
*write_info->magick='\0';
(void) SetImageInfo(write_info,1,exception);
if ((*write_info->magick == '\0') ||
(LocaleCompare(write_info->magick,"MASK") == 0))
(void) FormatLocaleString(mask_image->filename,MagickPathExtent,"miff:%s",
write_info->filename);
status=WriteImage(write_info,mask_image,exception);
mask_image=DestroyImage(mask_image);
write_info=DestroyImageInfo(write_info);
return(status);
}
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