forked from openkylin/imagemagick
785 lines
28 KiB
C
785 lines
28 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% RRRR L EEEEE %
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% R R L E %
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% RRRR L EEE %
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% R R L E %
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% R R LLLLL EEEEE %
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% %
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% %
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% Read URT RLE Image Format %
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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 "magick/studio.h"
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#include "magick/blob.h"
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#include "magick/blob-private.h"
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#include "magick/cache.h"
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#include "magick/colormap.h"
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#include "magick/colormap-private.h"
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#include "magick/exception.h"
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#include "magick/exception-private.h"
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#include "magick/image.h"
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#include "magick/image-private.h"
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#include "magick/list.h"
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#include "magick/magick.h"
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#include "magick/memory_.h"
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#include "magick/monitor.h"
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#include "magick/monitor-private.h"
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#include "magick/pixel-accessor.h"
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#include "magick/quantum-private.h"
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#include "magick/pixel.h"
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#include "magick/property.h"
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#include "magick/static.h"
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#include "magick/string_.h"
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#include "magick/module.h"
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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 R L 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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% IsRLE() returns MagickTrue if the image format type, identified by the
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% magick string, is RLE.
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%
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% The format of the ReadRLEImage method is:
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%
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% MagickBooleanType IsRLE(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: compare image format pattern against these bytes.
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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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*/
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static MagickBooleanType IsRLE(const unsigned char *magick,const size_t length)
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{
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if (length < 2)
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return(MagickFalse);
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if (memcmp(magick,"\122\314",2) == 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 R L E 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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% ReadRLEImage() reads a run-length encoded Utah Raster Toolkit
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% image file and returns it. It allocates the memory necessary for the new
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% Image structure and returns a pointer to the new image.
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%
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% The format of the ReadRLEImage method is:
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%
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% Image *ReadRLEImage(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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*/
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static Image *ReadRLEImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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#define SkipLinesOp 0x01
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#define SetColorOp 0x02
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#define SkipPixelsOp 0x03
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#define ByteDataOp 0x05
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#define RunDataOp 0x06
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#define EOFOp 0x07
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#define ThrowRLEException(exception,message) \
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{ \
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if (colormap != (unsigned char *) NULL) \
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colormap=(unsigned char *) RelinquishMagickMemory(colormap); \
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if (pixel_info != (MemoryInfo *) NULL) \
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pixel_info=RelinquishVirtualMemory(pixel_info); \
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ThrowReaderException((exception),(message)); \
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}
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char
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magick[12];
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Image
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*image;
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IndexPacket
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index;
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int
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opcode,
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operand,
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status;
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MagickStatusType
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flags;
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MagickSizeType
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number_pixels;
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MemoryInfo
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*pixel_info;
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IndexPacket
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*indexes;
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ssize_t
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x;
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PixelPacket
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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
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bits_per_pixel,
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map_length,
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number_colormaps,
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number_planes,
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number_planes_filled,
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one,
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pixel_info_length;
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ssize_t
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count,
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offset,
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y;
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unsigned char
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background_color[256],
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*colormap,
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pixel,
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plane,
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*pixels;
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/*
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Open image file.
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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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image=AcquireImage(image_info);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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/*
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Determine if this a RLE file.
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*/
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colormap=(unsigned char *) NULL;
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pixel_info=(MemoryInfo *) NULL;
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count=ReadBlob(image,2,(unsigned char *) magick);
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if ((count != 2) || (memcmp(magick,"\122\314",2) != 0))
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ThrowRLEException(CorruptImageError,"ImproperImageHeader");
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do
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{
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/*
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Read image header.
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*/
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image->page.x=(ssize_t) ReadBlobLSBShort(image);
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image->page.y=(ssize_t) ReadBlobLSBShort(image);
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image->columns=ReadBlobLSBShort(image);
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image->rows=ReadBlobLSBShort(image);
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flags=(MagickStatusType) ReadBlobByte(image);
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image->matte=flags & 0x04 ? MagickTrue : MagickFalse;
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number_planes=(size_t) ReadBlobByte(image);
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bits_per_pixel=(size_t) ReadBlobByte(image);
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number_colormaps=(size_t) ReadBlobByte(image);
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map_length=(unsigned char) ReadBlobByte(image);
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if (map_length >= 22)
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ThrowRLEException(CorruptImageError,"ImproperImageHeader");
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if (EOFBlob(image) != MagickFalse)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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one=1;
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map_length=one << map_length;
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if ((number_planes == 0) || (number_planes == 2) || ((flags & 0x04) &&
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((number_planes <= 2) || number_planes > 254)) || (bits_per_pixel != 8))
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ThrowRLEException(CorruptImageError,"ImproperImageHeader");
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if (number_planes > 4)
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ThrowRLEException(CorruptImageError,"ImproperImageHeader");
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if ((image->columns == 0) || (image->columns >= 32768) ||
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(image->rows == 0) || (image->rows >= 32768))
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ThrowRLEException(CorruptImageError,"ImproperImageHeader");
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if (flags & 0x02)
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{
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/*
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No background color-- initialize to black.
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*/
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for (i=0; i < (ssize_t) number_planes; i++)
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background_color[i]=0;
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(void) ReadBlobByte(image);
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}
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else
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{
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/*
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Initialize background color.
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*/
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p=background_color;
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for (i=0; i < (ssize_t) number_planes; i++)
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*p++=(unsigned char) ReadBlobByte(image);
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}
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if ((number_planes & 0x01) == 0)
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(void) ReadBlobByte(image);
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if (EOFBlob(image) != MagickFalse)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if (image->matte != MagickFalse)
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number_planes++;
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number_pixels=(MagickSizeType) image->columns*image->rows;
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if ((GetBlobSize(image) == 0) || ((((MagickSizeType) number_pixels*
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number_planes*bits_per_pixel/8)/GetBlobSize(image)) > 254))
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ThrowRLEException(CorruptImageError,"InsufficientImageDataInFile")
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if (((MagickSizeType) number_colormaps*map_length) > GetBlobSize(image))
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ThrowRLEException(CorruptImageError,"InsufficientImageDataInFile")
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if (number_colormaps != 0)
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{
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/*
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Read image colormaps.
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*/
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colormap=(unsigned char *) AcquireQuantumMemory(number_colormaps,
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3*map_length*sizeof(*colormap));
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if (colormap == (unsigned char *) NULL)
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ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed");
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(void) memset(colormap,0,3*number_colormaps*map_length*
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sizeof(*colormap));
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p=colormap;
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for (i=0; i < (ssize_t) number_colormaps; i++)
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for (x=0; x < (ssize_t) map_length; x++)
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{
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*p++=(unsigned char) ScaleQuantumToChar(ScaleShortToQuantum(
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ReadBlobLSBShort(image)));
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if (EOFBlob(image) != MagickFalse)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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}
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if ((flags & 0x08) != 0)
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{
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char
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*comment;
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size_t
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length;
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/*
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Read image comment.
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*/
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length=ReadBlobLSBShort(image);
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if (length != 0)
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{
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comment=(char *) AcquireQuantumMemory(length,sizeof(*comment));
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if (comment == (char *) NULL)
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ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed");
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count=ReadBlob(image,length-1,(unsigned char *) comment);
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if (count != (ssize_t) (length-1))
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{
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comment=DestroyString(comment);
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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comment[length-1]='\0';
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(void) SetImageProperty(image,"comment",comment);
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comment=DestroyString(comment);
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if ((length & 0x01) == 0)
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(void) ReadBlobByte(image);
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}
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}
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if (EOFBlob(image) != MagickFalse)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if ((image_info->ping != MagickFalse) && (image_info->number_scenes != 0))
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if (image->scene >= (image_info->scene+image_info->number_scenes-1))
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break;
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status=SetImageExtent(image,image->columns,image->rows);
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if (status == MagickFalse)
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{
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if (colormap != (unsigned char *) NULL)
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colormap=(unsigned char *) RelinquishMagickMemory(colormap);
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if (pixel_info != (MemoryInfo *) NULL)
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pixel_info=RelinquishVirtualMemory(pixel_info);
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InheritException(exception,&image->exception);
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return(DestroyImageList(image));
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}
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/*
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Allocate RLE pixels.
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*/
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number_planes_filled=(number_planes % 2 == 0) ? number_planes :
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number_planes+1;
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if ((number_pixels*number_planes_filled) != (size_t) (number_pixels*
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number_planes_filled))
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ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed");
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pixel_info=AcquireVirtualMemory(image->columns,image->rows*
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MagickMax(number_planes_filled,4)*sizeof(*pixels));
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if (pixel_info == (MemoryInfo *) NULL)
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ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed");
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pixel_info_length=image->columns*image->rows*
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MagickMax(number_planes_filled,4);
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pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
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(void) memset(pixels,0,pixel_info_length);
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if ((flags & 0x01) && !(flags & 0x02))
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{
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ssize_t
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j;
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/*
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Set background color.
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*/
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p=pixels;
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for (i=0; i < (ssize_t) number_pixels; i++)
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{
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if (image->matte == MagickFalse)
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for (j=0; j < (ssize_t) number_planes; j++)
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*p++=background_color[j];
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else
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{
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for (j=0; j < (ssize_t) (number_planes-1); j++)
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*p++=background_color[j];
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*p++=0; /* initialize matte channel */
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}
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}
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}
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/*
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Read runlength-encoded image.
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*/
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plane=0;
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x=0;
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y=0;
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opcode=ReadBlobByte(image);
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if (opcode == EOF)
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{
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if (number_colormaps != 0)
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colormap=(unsigned char *) RelinquishMagickMemory(colormap);
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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do
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{
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switch (opcode & 0x3f)
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{
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case SkipLinesOp:
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{
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operand=ReadBlobByte(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if (opcode & 0x40)
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{
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operand=ReadBlobLSBSignedShort(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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x=0;
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y+=operand;
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break;
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}
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case SetColorOp:
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{
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operand=ReadBlobByte(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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plane=(unsigned char) operand;
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if (plane == 255)
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plane=(unsigned char) (number_planes-1);
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x=0;
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break;
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}
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case SkipPixelsOp:
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{
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operand=ReadBlobByte(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if (opcode & 0x40)
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{
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operand=ReadBlobLSBSignedShort(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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x+=operand;
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break;
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}
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case ByteDataOp:
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{
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operand=ReadBlobByte(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if (opcode & 0x40)
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{
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operand=ReadBlobLSBSignedShort(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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offset=(ssize_t) (((image->rows-y-1)*image->columns*number_planes)+x*
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number_planes+plane);
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operand++;
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if ((offset < 0) ||
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((size_t) (offset+operand*number_planes) > pixel_info_length))
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ThrowRLEException(CorruptImageError,"UnableToReadImageData");
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p=pixels+offset;
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for (i=0; i < (ssize_t) operand; i++)
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{
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pixel=(unsigned char) ReadBlobByte(image);
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if ((y < (ssize_t) image->rows) &&
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((x+i) < (ssize_t) image->columns))
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*p=pixel;
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p+=number_planes;
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}
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if (operand & 0x01)
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(void) ReadBlobByte(image);
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x+=operand;
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break;
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}
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case RunDataOp:
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{
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operand=ReadBlobByte(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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if (opcode & 0x40)
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{
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operand=ReadBlobLSBSignedShort(image);
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if (operand == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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}
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pixel=(unsigned char) ReadBlobByte(image);
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(void) ReadBlobByte(image);
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operand++;
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offset=(ssize_t) (((image->rows-y-1)*image->columns*number_planes)+x*
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number_planes+plane);
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if ((offset < 0) ||
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((size_t) (offset+operand*number_planes) > pixel_info_length))
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ThrowRLEException(CorruptImageError,"UnableToReadImageData");
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p=pixels+offset;
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for (i=0; i < (ssize_t) operand; i++)
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{
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if ((y < (ssize_t) image->rows) &&
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((x+i) < (ssize_t) image->columns))
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*p=pixel;
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p+=number_planes;
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}
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x+=operand;
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break;
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}
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default:
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break;
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}
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opcode=ReadBlobByte(image);
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if (opcode == EOF)
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ThrowRLEException(CorruptImageError,"UnexpectedEndOfFile");
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} while (((opcode & 0x3f) != EOFOp) && (opcode != EOF));
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if (number_colormaps != 0)
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{
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MagickStatusType
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mask;
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/*
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Apply colormap affineation to image.
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*/
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mask=(MagickStatusType) (map_length-1);
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p=pixels;
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x=(ssize_t) number_planes;
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if (number_colormaps == 1)
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for (i=0; i < (ssize_t) number_pixels; i++)
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{
|
||
if (IsValidColormapIndex(image,(ssize_t) (*p & mask),&index,exception) ==
|
||
MagickFalse)
|
||
break;
|
||
*p=colormap[(ssize_t) index];
|
||
p++;
|
||
}
|
||
else
|
||
if ((number_planes >= 3) && (number_colormaps >= 3))
|
||
for (i=0; i < (ssize_t) number_pixels; i++)
|
||
for (x=0; x < (ssize_t) number_planes; x++)
|
||
{
|
||
if (IsValidColormapIndex(image,(ssize_t) (x*map_length+
|
||
(*p & mask)),&index,exception) == MagickFalse)
|
||
break;
|
||
*p=colormap[(ssize_t) index];
|
||
p++;
|
||
}
|
||
if ((i < (ssize_t) number_pixels) || (x < (ssize_t) number_planes))
|
||
ThrowRLEException(CorruptImageError,"UnableToReadImageData");
|
||
}
|
||
/*
|
||
Initialize image structure.
|
||
*/
|
||
if (number_planes >= 3)
|
||
{
|
||
/*
|
||
Convert raster image to DirectClass pixel packets.
|
||
*/
|
||
p=pixels;
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
SetPixelRed(q,ScaleCharToQuantum(*p++));
|
||
SetPixelGreen(q,ScaleCharToQuantum(*p++));
|
||
SetPixelBlue(q,ScaleCharToQuantum(*p++));
|
||
if (image->matte != MagickFalse)
|
||
SetPixelAlpha(q,ScaleCharToQuantum(*p++));
|
||
q++;
|
||
}
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Create colormap.
|
||
*/
|
||
if (number_colormaps == 0)
|
||
map_length=256;
|
||
if (AcquireImageColormap(image,map_length) == MagickFalse)
|
||
ThrowRLEException(ResourceLimitError,"MemoryAllocationFailed");
|
||
p=colormap;
|
||
if (number_colormaps == 1)
|
||
for (i=0; i < (ssize_t) image->colors; i++)
|
||
{
|
||
/*
|
||
Pseudocolor.
|
||
*/
|
||
image->colormap[i].red=ScaleCharToQuantum((unsigned char) i);
|
||
image->colormap[i].green=ScaleCharToQuantum((unsigned char) i);
|
||
image->colormap[i].blue=ScaleCharToQuantum((unsigned char) i);
|
||
}
|
||
else
|
||
if (number_colormaps > 1)
|
||
for (i=0; i < (ssize_t) image->colors; i++)
|
||
{
|
||
image->colormap[i].red=ScaleCharToQuantum(*p);
|
||
image->colormap[i].green=ScaleCharToQuantum(*(p+map_length));
|
||
image->colormap[i].blue=ScaleCharToQuantum(*(p+map_length*2));
|
||
p++;
|
||
}
|
||
p=pixels;
|
||
if (image->matte == MagickFalse)
|
||
{
|
||
/*
|
||
Convert raster image to PseudoClass pixel packets.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
indexes=GetAuthenticIndexQueue(image);
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
SetPixelIndex(indexes+x,*p++);
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
y,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
(void) SyncImage(image);
|
||
}
|
||
else
|
||
{
|
||
/*
|
||
Image has a matte channel-- promote to DirectClass.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
|
||
if (q == (PixelPacket *) NULL)
|
||
break;
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
if (IsValidColormapIndex(image,(ssize_t) *p++,&index,exception) ==
|
||
MagickFalse)
|
||
break;
|
||
SetPixelRed(q,image->colormap[(ssize_t) index].red);
|
||
if (IsValidColormapIndex(image,(ssize_t) *p++,&index,exception) ==
|
||
MagickFalse)
|
||
break;
|
||
SetPixelGreen(q,image->colormap[(ssize_t) index].green);
|
||
if (IsValidColormapIndex(image,(ssize_t) *p++,&index,exception) ==
|
||
MagickFalse)
|
||
break;
|
||
SetPixelBlue(q,image->colormap[(ssize_t) index].blue);
|
||
SetPixelAlpha(q,ScaleCharToQuantum(*p++));
|
||
q++;
|
||
}
|
||
if (x < (ssize_t) image->columns)
|
||
break;
|
||
if (SyncAuthenticPixels(image,exception) == MagickFalse)
|
||
break;
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,LoadImageTag,(MagickOffsetType)
|
||
y,image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
image->colormap=(PixelPacket *) RelinquishMagickMemory(
|
||
image->colormap);
|
||
image->storage_class=DirectClass;
|
||
image->colors=0;
|
||
}
|
||
}
|
||
if (number_colormaps != 0)
|
||
colormap=(unsigned char *) RelinquishMagickMemory(colormap);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
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;
|
||
(void) ReadBlobByte(image);
|
||
count=ReadBlob(image,2,(unsigned char *) magick);
|
||
if ((count != 0) && (memcmp(magick,"\122\314",2) == 0))
|
||
{
|
||
/*
|
||
Allocate next image structure.
|
||
*/
|
||
AcquireNextImage(image_info,image);
|
||
if (GetNextImageInList(image) == (Image *) NULL)
|
||
{
|
||
status=MagickFalse;
|
||
break;
|
||
}
|
||
image=SyncNextImageInList(image);
|
||
status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
|
||
GetBlobSize(image));
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
} while ((count != 0) && (memcmp(magick,"\122\314",2) == 0));
|
||
(void) CloseBlob(image);
|
||
if (status == MagickFalse)
|
||
return(DestroyImageList(image));
|
||
return(GetFirstImageInList(image));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e g i s t e r R L E I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RegisterRLEImage() adds attributes for the RLE 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 RegisterRLEImage method is:
|
||
%
|
||
% size_t RegisterRLEImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterRLEImage(void)
|
||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("RLE");
|
||
entry->decoder=(DecodeImageHandler *) ReadRLEImage;
|
||
entry->magick=(IsImageFormatHandler *) IsRLE;
|
||
entry->seekable_stream=MagickTrue;
|
||
entry->adjoin=MagickFalse;
|
||
entry->description=ConstantString("Utah Run length encoded image");
|
||
entry->magick_module=ConstantString("RLE");
|
||
(void) RegisterMagickInfo(entry);
|
||
return(MagickImageCoderSignature);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% U n r e g i s t e r R L E I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% UnregisterRLEImage() removes format registrations made by the
|
||
% RLE module from the list of supported formats.
|
||
%
|
||
% The format of the UnregisterRLEImage method is:
|
||
%
|
||
% UnregisterRLEImage(void)
|
||
%
|
||
*/
|
||
ModuleExport void UnregisterRLEImage(void)
|
||
{
|
||
(void) UnregisterMagickInfo("RLE");
|
||
}
|