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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 GGGG K K %
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% MM MM G K K %
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% M M M G GG KKK %
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% M M G G K K %
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% M M GGG K K %
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% %
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% %
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% Read/Write MGK Image Format. %
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% %
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% Software Design %
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% John 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/blob.h>
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#include <MagickCore/cache.h>
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#include <MagickCore/colorspace.h>
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#include <MagickCore/exception.h>
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#include <MagickCore/image.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/pixel-accessor.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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WriteMGKImage(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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% I s M G K %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsMGK() returns MagickTrue if the image format type, identified by the
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% magick string, is MGK.
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%
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% The format of the IsMGK method is:
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%
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% MagickBooleanType IsMGK(const unsigned char *magick,const size_t length)
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%
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% A description of each parameter follows:
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%
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% o magick: This string is generally the first few bytes of an image file
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% or blob.
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%
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% o length: Specifies the length of the magick string.
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%
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*/
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static MagickBooleanType IsMGK(const unsigned char *magick,const size_t length)
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{
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if (length < 7)
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return(MagickFalse);
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if (LocaleNCompare((char *) magick,"id=mgk",7) == 0)
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return(MagickTrue);
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return(MagickFalse);
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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 a d M G 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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% ReadMGKImage() reads a MGK image file and returns it. It allocates the
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% memory necessary for the new Image structure and returns a pointer to the
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% new image.
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%
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% The format of the ReadMGKImage method is:
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%
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% Image *ReadMGKImage(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 *ReadMGKImage(const ImageInfo *image_info,ExceptionInfo *exception)
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|
|
{
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char
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|
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buffer[MaxTextExtent];
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Image
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*image;
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long
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|
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y;
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MagickBooleanType
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|
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status;
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register long
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x;
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register Quantum
|
|
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*q;
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|
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register unsigned char
|
|
|
*p;
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|
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ssize_t
|
|
|
count;
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|
unsigned char
|
|
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*pixels;
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unsigned long
|
|
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columns,
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|
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rows;
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|
|
/*
|
|
|
Open image file.
|
|
|
*/
|
|
|
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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|
|
image=AcquireImage(image_info,exception);
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|
|
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
image=DestroyImageList(image);
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|
|
return((Image *) NULL);
|
|
|
}
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|
|
/*
|
|
|
Read MGK image.
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|
|
*/
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|
|
(void) ReadBlobString(image,buffer); /* read magic number */
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|
|
if (IsMGK(buffer,7) == MagickFalse)
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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|
|
(void) ReadBlobString(image,buffer);
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|
|
count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
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|
|
if (count <= 0)
|
|
|
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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|
|
do
|
|
|
{
|
|
|
/*
|
|
|
Initialize image structure.
|
|
|
*/
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|
|
image->columns=columns;
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|
|
image->rows=rows;
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|
|
image->depth=8;
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|
|
if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
|
|
|
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
|
|
|
break;
|
|
|
/*
|
|
|
Convert MGK raster image to pixel packets.
|
|
|
*/
|
|
|
if (SetImageExtent(image,image->columns,image->rows,exception) == MagickFalse)
|
|
|
return(DestroyImageList(image));
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
|
|
|
3UL*sizeof(*pixels));
|
|
|
if (pixels == (unsigned char *) NULL)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
count=(ssize_t) ReadBlob(image,(size_t) (3*image->columns),pixels);
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|
|
if (count != (ssize_t) (3*image->columns))
|
|
|
ThrowReaderException(CorruptImageError,"UnableToReadImageData");
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|
p=pixels;
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|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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|
|
if (q == (Quantum *) NULL)
|
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|
break;
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|
for (x=0; x < (ssize_t) image->columns; x++)
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|
|
{
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|
|
SetPixelRed(image,ScaleCharToQuantum(*p++),q);
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|
SetPixelGreen(image,ScaleCharToQuantum(*p++),q);
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|
SetPixelBlue(image,ScaleCharToQuantum(*p++),q);
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|
q+=GetPixelChannels(image);
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|
|
}
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|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
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|
break;
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|
|
if (image->previous == (Image *) NULL)
|
|
|
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
|
|
|
(QuantumTick(y,image->rows) != MagickFalse))
|
|
|
{
|
|
|
status=image->progress_monitor(LoadImageTag,y,image->rows,
|
|
|
image->client_data);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
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|
|
if (EOFBlob(image) != MagickFalse)
|
|
|
{
|
|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
|
|
image->filename);
|
|
|
break;
|
|
|
}
|
|
|
/*
|
|
|
Proceed to next image.
|
|
|
*/
|
|
|
if (image_info->number_scenes != 0)
|
|
|
if (image->scene >= (image_info->scene+image_info->number_scenes-1))
|
|
|
break;
|
|
|
*buffer='\0';
|
|
|
(void) ReadBlobString(image,buffer);
|
|
|
count=(ssize_t) sscanf(buffer,"%lu %lu\n",&columns,&rows);
|
|
|
if (count > 0)
|
|
|
{
|
|
|
/*
|
|
|
Allocate next image structure.
|
|
|
*/
|
|
|
AcquireNextImage(image_info,image,exception);
|
|
|
if (GetNextImageInList(image) == (Image *) NULL)
|
|
|
{
|
|
|
status=MagickFalse;
|
|
|
break;
|
|
|
}
|
|
|
image=SyncNextImageInList(image);
|
|
|
if (image->progress_monitor != (MagickProgressMonitor) NULL)
|
|
|
{
|
|
|
status=SetImageProgress(image,LoadImageTag,TellBlob(image),
|
|
|
GetBlobSize(image));
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
} while (count > 0);
|
|
|
(void) CloseBlob(image);
|
|
|
if (status == MagickFalse)
|
|
|
return(DestroyImageList(image));
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r M G K I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterMGKImage() adds attributes for the MGK 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 RegisterMGKImage method is:
|
|
|
%
|
|
|
% unsigned long RegisterMGKImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport unsigned long RegisterMGKImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("MGK","MGK","MGK image");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadMGKImage;
|
|
|
entry->encoder=(EncodeImageHandler *) WriteMGKImage;
|
|
|
entry->magick=(IsImageFormatHandler *) IsMGK;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r M G K I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterMGKImage() removes format registrations made by the
|
|
|
% MGK module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterMGKImage method is:
|
|
|
%
|
|
|
% UnregisterMGKImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterMGKImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("MGK");
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% W r i t e M G K I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% WriteMGKImage() writes an image to a file in red, green, and blue MGK
|
|
|
% rasterfile format.
|
|
|
%
|
|
|
% The format of the WriteMGKImage method is:
|
|
|
%
|
|
|
% MagickBooleanType WriteMGKImage(const ImageInfo *image_info,
|
|
|
% Image *image)
|
|
|
%
|
|
|
% 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 WriteMGKImage(const ImageInfo *image_info,Image *image,
|
|
|
ExceptionInfo *exception)
|
|
|
{
|
|
|
char
|
|
|
buffer[MaxTextExtent];
|
|
|
|
|
|
long
|
|
|
y;
|
|
|
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
MagickOffsetType
|
|
|
scene;
|
|
|
|
|
|
register const Quantum
|
|
|
*p;
|
|
|
|
|
|
register long
|
|
|
x;
|
|
|
|
|
|
register unsigned char
|
|
|
*q;
|
|
|
|
|
|
unsigned char
|
|
|
*pixels;
|
|
|
|
|
|
/*
|
|
|
Open output image file.
|
|
|
*/
|
|
|
assert(image_info != (const ImageInfo *) NULL);
|
|
|
assert(image_info->signature == MagickCoreSignature);
|
|
|
assert(image != (Image *) NULL);
|
|
|
assert(image->signature == MagickCoreSignature);
|
|
|
if (image->debug != MagickFalse)
|
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
|
|
|
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(status);
|
|
|
scene=0;
|
|
|
do
|
|
|
{
|
|
|
/*
|
|
|
Allocate memory for pixels.
|
|
|
*/
|
|
|
if (image->colorspace != RGBColorspace)
|
|
|
(void) SetImageColorspace(image,RGBColorspace,exception);
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory((size_t) image->columns,
|
|
|
3UL*sizeof(*pixels));
|
|
|
if (pixels == (unsigned char *) NULL)
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
/*
|
|
|
Initialize raster file header.
|
|
|
*/
|
|
|
(void) WriteBlobString(image,"id=mgk\n");
|
|
|
(void) FormatLocaleString(buffer,MaxTextExtent,"%lu %lu\n",image->columns,
|
|
|
image->rows);
|
|
|
(void) WriteBlobString(image,buffer);
|
|
|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
|
|
|
if (p == (const Quantum *) NULL)
|
|
|
break;
|
|
|
q=pixels;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
*q++=ScaleQuantumToChar(GetPixelRed(image,p));
|
|
|
*q++=ScaleQuantumToChar(GetPixelGreen(image,p));
|
|
|
*q++=ScaleQuantumToChar(GetPixelBlue(image,p));
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
(void) WriteBlob(image,(size_t) (q-pixels),pixels);
|
|
|
if (image->previous == (Image *) NULL)
|
|
|
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
|
|
|
(QuantumTick(y,image->rows) != MagickFalse))
|
|
|
{
|
|
|
status=image->progress_monitor(SaveImageTag,y,image->rows,
|
|
|
image->client_data);
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
if (GetNextImageInList(image) == (Image *) NULL)
|
|
|
break;
|
|
|
image=SyncNextImageInList(image);
|
|
|
status=SetImageProgress(image,SaveImagesTag,scene,
|
|
|
GetImageListLength(image));
|
|
|
if (status == MagickFalse)
|
|
|
break;
|
|
|
scene++;
|
|
|
} while (image_info->adjoin != MagickFalse);
|
|
|
(void) CloseBlob(image);
|
|
|
return(MagickTrue);
|
|
|
}
|
