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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 PPPP %
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% MM MM A A P P %
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% M M M AAAAA PPPP %
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% M M A A P %
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% M M A A P %
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% %
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% %
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% Read/Write Image Colormaps as an Image 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/cache.h"
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#include "MagickCore/color.h"
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#include "MagickCore/color-private.h"
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#include "MagickCore/colormap.h"
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#include "MagickCore/colormap-private.h"
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#include "MagickCore/colorspace.h"
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#include "MagickCore/colorspace-private.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/histogram.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-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/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/statistic.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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WriteMAPImage(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 P 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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% ReadMAPImage() reads an image of raw RGB colormap and colormap index
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% bytes and returns it. It allocates the memory necessary for the new Image
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% structure and returns a pointer to the new image.
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%
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% The format of the ReadMAPImage method is:
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%
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% Image *ReadMAPImage(const ImageInfo *image_info,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 *ReadMAPImage(const ImageInfo *image_info,ExceptionInfo *exception)
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|
{
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Image
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*image;
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MagickBooleanType
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status;
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Quantum
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index;
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ssize_t
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x;
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Quantum
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*q;
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ssize_t
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i;
|
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unsigned char
|
|
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*p;
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size_t
|
|
|
depth,
|
|
|
packet_size,
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|
|
quantum;
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|
ssize_t
|
|
|
count,
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|
|
y;
|
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|
|
unsigned char
|
|
|
*colormap,
|
|
|
*pixels;
|
|
|
|
|
|
/*
|
|
|
Open image file.
|
|
|
*/
|
|
|
assert(image_info != (const ImageInfo *) NULL);
|
|
|
assert(image_info->signature == MagickCoreSignature);
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|
|
if (image_info->debug != MagickFalse)
|
|
|
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
|
|
|
image_info->filename);
|
|
|
assert(exception != (ExceptionInfo *) NULL);
|
|
|
assert(exception->signature == MagickCoreSignature);
|
|
|
image=AcquireImage(image_info,exception);
|
|
|
if ((image->columns == 0) || (image->rows == 0))
|
|
|
ThrowReaderException(OptionError,"MustSpecifyImageSize");
|
|
|
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
image=DestroyImageList(image);
|
|
|
return((Image *) NULL);
|
|
|
}
|
|
|
/*
|
|
|
Initialize image structure.
|
|
|
*/
|
|
|
image->storage_class=PseudoClass;
|
|
|
status=AcquireImageColormap(image,(size_t)
|
|
|
(image->offset != 0 ? image->offset : 256),exception);
|
|
|
if (status == MagickFalse)
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
depth=GetImageQuantumDepth(image,MagickTrue);
|
|
|
packet_size=(size_t) (depth/8);
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size*
|
|
|
sizeof(*pixels));
|
|
|
packet_size=(size_t) (image->colors > 256 ? 6UL : 3UL);
|
|
|
colormap=(unsigned char *) AcquireQuantumMemory(image->colors,packet_size*
|
|
|
sizeof(*colormap));
|
|
|
if ((pixels == (unsigned char *) NULL) ||
|
|
|
(colormap == (unsigned char *) NULL))
|
|
|
{
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
|
|
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
}
|
|
|
/*
|
|
|
Read image colormap.
|
|
|
*/
|
|
|
count=ReadBlob(image,packet_size*image->colors,colormap);
|
|
|
if (count != (ssize_t) (packet_size*image->colors))
|
|
|
{
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
|
|
ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
|
|
|
}
|
|
|
p=colormap;
|
|
|
if (image->depth <= 8)
|
|
|
for (i=0; i < (ssize_t) image->colors; i++)
|
|
|
{
|
|
|
image->colormap[i].red=ScaleCharToQuantum(*p++);
|
|
|
image->colormap[i].green=ScaleCharToQuantum(*p++);
|
|
|
image->colormap[i].blue=ScaleCharToQuantum(*p++);
|
|
|
}
|
|
|
else
|
|
|
for (i=0; i < (ssize_t) image->colors; i++)
|
|
|
{
|
|
|
quantum=(*p++ << 8);
|
|
|
quantum|=(*p++);
|
|
|
image->colormap[i].red=(Quantum) quantum;
|
|
|
quantum=(*p++ << 8);
|
|
|
quantum|=(*p++);
|
|
|
image->colormap[i].green=(Quantum) quantum;
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|
|
quantum=(*p++ << 8);
|
|
|
quantum|=(*p++);
|
|
|
image->colormap[i].blue=(Quantum) quantum;
|
|
|
}
|
|
|
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
|
|
if (image_info->ping != MagickFalse)
|
|
|
{
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|
|
(void) CloseBlob(image);
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|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
status=SetImageExtent(image,image->columns,image->rows,exception);
|
|
|
if (status == MagickFalse)
|
|
|
{
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
return(DestroyImageList(image));
|
|
|
}
|
|
|
/*
|
|
|
Read image pixels.
|
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|
*/
|
|
|
packet_size=(size_t) (depth/8);
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|
for (y=0; y < (ssize_t) image->rows; y++)
|
|
|
{
|
|
|
p=pixels;
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|
|
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
|
|
if (q == (Quantum *) NULL)
|
|
|
break;
|
|
|
count=ReadBlob(image,(size_t) packet_size*image->columns,pixels);
|
|
|
if (count != (ssize_t) (packet_size*image->columns))
|
|
|
break;
|
|
|
for (x=0; x < (ssize_t) image->columns; x++)
|
|
|
{
|
|
|
index=ConstrainColormapIndex(image,*p,exception);
|
|
|
p++;
|
|
|
if (image->colors > 256)
|
|
|
{
|
|
|
index=ConstrainColormapIndex(image,((size_t) index << 8)+(*p),
|
|
|
exception);
|
|
|
p++;
|
|
|
}
|
|
|
SetPixelIndex(image,index,q);
|
|
|
SetPixelViaPixelInfo(image,image->colormap+(ssize_t) index,q);
|
|
|
q+=GetPixelChannels(image);
|
|
|
}
|
|
|
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
|
|
break;
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
if (y < (ssize_t) image->rows)
|
|
|
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
|
|
|
image->filename);
|
|
|
(void) CloseBlob(image);
|
|
|
return(GetFirstImageInList(image));
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% R e g i s t e r M A P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% RegisterMAPImage() adds attributes for the MAP 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 RegisterMAPImage method is:
|
|
|
%
|
|
|
% size_t RegisterMAPImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport size_t RegisterMAPImage(void)
|
|
|
{
|
|
|
MagickInfo
|
|
|
*entry;
|
|
|
|
|
|
entry=AcquireMagickInfo("MAP","MAP","Colormap intensities and indices");
|
|
|
entry->decoder=(DecodeImageHandler *) ReadMAPImage;
|
|
|
entry->encoder=(EncodeImageHandler *) WriteMAPImage;
|
|
|
entry->flags^=CoderAdjoinFlag;
|
|
|
entry->format_type=ExplicitFormatType;
|
|
|
entry->flags|=CoderRawSupportFlag;
|
|
|
entry->flags|=CoderEndianSupportFlag;
|
|
|
(void) RegisterMagickInfo(entry);
|
|
|
return(MagickImageCoderSignature);
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% U n r e g i s t e r M A P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% UnregisterMAPImage() removes format registrations made by the
|
|
|
% MAP module from the list of supported formats.
|
|
|
%
|
|
|
% The format of the UnregisterMAPImage method is:
|
|
|
%
|
|
|
% UnregisterMAPImage(void)
|
|
|
%
|
|
|
*/
|
|
|
ModuleExport void UnregisterMAPImage(void)
|
|
|
{
|
|
|
(void) UnregisterMagickInfo("MAP");
|
|
|
}
|
|
|
|
|
|
/*
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
% W r i t e M A P I m a g e %
|
|
|
% %
|
|
|
% %
|
|
|
% %
|
|
|
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
|
|
%
|
|
|
% WriteMAPImage() writes an image to a file as red, green, and blue
|
|
|
% colormap bytes followed by the colormap indexes.
|
|
|
%
|
|
|
% The format of the WriteMAPImage method is:
|
|
|
%
|
|
|
% MagickBooleanType WriteMAPImage(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 WriteMAPImage(const ImageInfo *image_info,Image *image,
|
|
|
ExceptionInfo *exception)
|
|
|
{
|
|
|
MagickBooleanType
|
|
|
status;
|
|
|
|
|
|
const Quantum
|
|
|
*p;
|
|
|
|
|
|
ssize_t
|
|
|
i,
|
|
|
x;
|
|
|
|
|
|
unsigned char
|
|
|
*q;
|
|
|
|
|
|
size_t
|
|
|
depth,
|
|
|
packet_size;
|
|
|
|
|
|
ssize_t
|
|
|
y;
|
|
|
|
|
|
unsigned char
|
|
|
*colormap,
|
|
|
*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);
|
|
|
assert(exception != (ExceptionInfo *) NULL);
|
|
|
assert(exception->signature == MagickCoreSignature);
|
|
|
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
|
|
|
if (status == MagickFalse)
|
|
|
return(status);
|
|
|
(void) TransformImageColorspace(image,sRGBColorspace,exception);
|
|
|
/*
|
|
|
Allocate colormap.
|
|
|
*/
|
|
|
if (SetImageType(image,PaletteType,exception) == MagickFalse)
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
depth=GetImageQuantumDepth(image,MagickTrue);
|
|
|
packet_size=(size_t) (depth/8);
|
|
|
pixels=(unsigned char *) AcquireQuantumMemory(image->columns,packet_size*
|
|
|
sizeof(*pixels));
|
|
|
packet_size=(size_t) (image->colors > 256 ? 6UL : 3UL);
|
|
|
colormap=(unsigned char *) AcquireQuantumMemory(image->colors,packet_size*
|
|
|
sizeof(*colormap));
|
|
|
if ((pixels == (unsigned char *) NULL) ||
|
|
|
(colormap == (unsigned char *) NULL))
|
|
|
{
|
|
|
if (colormap != (unsigned char *) NULL)
|
|
|
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
|
|
if (pixels != (unsigned char *) NULL)
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
|
|
}
|
|
|
/*
|
|
|
Write colormap to file.
|
|
|
*/
|
|
|
q=colormap;
|
|
|
if (image->colors <= 256)
|
|
|
for (i=0; i < (ssize_t) image->colors; i++)
|
|
|
{
|
|
|
*q++=(unsigned char) ScaleQuantumToChar(image->colormap[i].red);
|
|
|
*q++=(unsigned char) ScaleQuantumToChar(image->colormap[i].green);
|
|
|
*q++=(unsigned char) ScaleQuantumToChar(image->colormap[i].blue);
|
|
|
}
|
|
|
else
|
|
|
for (i=0; i < (ssize_t) image->colors; i++)
|
|
|
{
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].red) >> 8);
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].red) & 0xff);
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].green) >> 8);
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].green) &
|
|
|
0xff);
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].blue) >> 8);
|
|
|
*q++=(unsigned char) (ScaleQuantumToShort(image->colormap[i].blue) &
|
|
|
0xff);
|
|
|
}
|
|
|
(void) WriteBlob(image,packet_size*image->colors,colormap);
|
|
|
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
|
|
/*
|
|
|
Write image pixels to file.
|
|
|
*/
|
|
|
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++)
|
|
|
{
|
|
|
if (image->colors > 256)
|
|
|
*q++=(unsigned char) ((size_t) GetPixelIndex(image,p) >> 8);
|
|
|
*q++=(unsigned char) ((ssize_t) GetPixelIndex(image,p));
|
|
|
p+=GetPixelChannels(image);
|
|
|
}
|
|
|
(void) WriteBlob(image,(size_t) (q-pixels),pixels);
|
|
|
}
|
|
|
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
|
|
|
(void) CloseBlob(image);
|
|
|
return(status);
|
|
|
}
|
