/*
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% %
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% M M AAA TTTTT TTTTT EEEEE %
% MM MM A A T T E %
% M M M AAAAA T T EEE %
% M M A A T T E %
% M M A A T T EEEEE %
% %
% %
% Write Matte Channel To MIFF File. %
% %
% Software Design %
% Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2019 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/cache.h"
#include "MagickCore/constitute.h"
#include "MagickCore/exception.h"
#include "MagickCore/exception-private.h"
#include "MagickCore/image-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
WriteMATTEImage(const ImageInfo *,Image *,ExceptionInfo *);
/*
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% R e g i s t e r M A T T E I m a g e %
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%
% RegisterMATTEImage() adds attributes for the MATTE 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 RegisterMATTEImage method is:
%
% size_t RegisterMATTEImage(void)
%
*/
ModuleExport size_t RegisterMATTEImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("MATTE","MATTE","MATTE format");
entry->encoder=(EncodeImageHandler *) WriteMATTEImage;
entry->format_type=ExplicitFormatType;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
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% U n r e g i s t e r M A T T E I m a g e %
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%
% UnregisterMATTEImage() removes format registrations made by the
% MATTE module from the list of supported formats.
%
% The format of the UnregisterMATTEImage method is:
%
% UnregisterMATTEImage(void)
%
*/
ModuleExport void UnregisterMATTEImage(void)
{
(void) UnregisterMagickInfo("MATTE");
}
/*
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% %
% %
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% W r i t e M A T T E I m a g e %
% %
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% WriteMATTEImage() writes an image of matte bytes to a file. It consists of
% data from the matte component of the image [0..255].
%
% The format of the WriteMATTEImage method is:
%
% MagickBooleanType WriteMATTEImage(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 MagickBooleanType WriteMATTEImage(const ImageInfo *image_info,
Image *image,ExceptionInfo *exception)
{
Image
*matte_image;
ImageInfo
*write_info;
MagickBooleanType
status;
register const Quantum
*p;
register ssize_t
x;
register Quantum
*q;
ssize_t
y;
if (image->alpha_trait == UndefinedPixelTrait)
ThrowWriterException(CoderError,"ImageDoesNotHaveAnAlphaChannel");
matte_image=CloneImage(image,0,0,MagickTrue,exception);
if (matte_image == (Image *) NULL)
return(MagickFalse);
(void) SetImageType(matte_image,TrueColorAlphaType,exception);
matte_image->alpha_trait=UndefinedPixelTrait;
/*
Convert image to matte pixels.
*/
for (y=0; y < (ssize_t) image->rows; y++)
{
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
q=QueueAuthenticPixels(matte_image,0,y,matte_image->columns,1,exception);
if ((p == (const Quantum *) NULL) || (q == (Quantum *) NULL))
break;
for (x=0; x < (ssize_t) image->columns; x++)
{
SetPixelRed(matte_image,GetPixelAlpha(image,p),q);
SetPixelGreen(matte_image,GetPixelAlpha(image,p),q);
SetPixelBlue(matte_image,GetPixelAlpha(image,p),q);
SetPixelAlpha(matte_image,OpaqueAlpha,q);
p+=GetPixelChannels(image);
q+=GetPixelChannels(matte_image);
}
if (SyncAuthenticPixels(matte_image,exception) == MagickFalse)
break;
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
write_info=CloneImageInfo(image_info);
if ((*write_info->magick == '\0') ||
(LocaleCompare(write_info->magick,"MATTE") == 0))
(void) FormatLocaleString(matte_image->filename,MagickPathExtent,
"MIFF:%s",image->filename);
status=WriteImage(write_info,matte_image,exception);
write_info=DestroyImageInfo(write_info);
matte_image=DestroyImage(matte_image);
return(status);
}