forked from openkylin/imagemagick
1199 lines
40 KiB
C
1199 lines
40 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% SSSSS GGGG IIIII %
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% SS G I %
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% SSS G GG I %
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% SS G G I %
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% SSSSS GGG IIIII %
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% %
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% %
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% Read/Write Irix RGB 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/attribute.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/color.h"
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#include "magick/color-private.h"
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#include "magick/colormap.h"
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#include "magick/colorspace.h"
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#include "magick/colorspace-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/property.h"
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#include "magick/quantum-private.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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Typedef declaractions.
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*/
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typedef struct _SGIInfo
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{
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unsigned short
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magic;
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unsigned char
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storage,
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bytes_per_pixel;
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unsigned short
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dimension,
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columns,
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rows,
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depth;
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size_t
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minimum_value,
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maximum_value,
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sans;
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char
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name[80];
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size_t
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pixel_format;
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unsigned char
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filler[404];
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} SGIInfo;
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/*
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Forward declarations.
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*/
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static MagickBooleanType
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WriteSGIImage(const ImageInfo *,Image *);
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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 S G I %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsSGI() returns MagickTrue if the image format type, identified by the
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% magick string, is SGI.
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%
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% The format of the IsSGI method is:
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%
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% MagickBooleanType IsSGI(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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static MagickBooleanType IsSGI(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,"\001\332",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 S G I 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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% ReadSGIImage() reads a SGI RGB image file and returns it. It
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% allocates the memory necessary for the new Image structure and returns a
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% pointer to the new image.
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%
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% The format of the ReadSGIImage method is:
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%
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% Image *ReadSGIImage(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 MagickBooleanType SGIDecode(const size_t bytes_per_pixel,
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ssize_t number_packets,unsigned char *packets,ssize_t number_pixels,
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unsigned char *pixels)
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{
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unsigned char
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*p,
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*q;
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size_t
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pixel;
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ssize_t
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count;
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p=packets;
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q=pixels;
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if (bytes_per_pixel == 2)
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{
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for ( ; number_pixels > 0; )
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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pixel=(size_t) (*p++) << 8;
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pixel|=(*p++);
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count=(ssize_t) (pixel & 0x7f);
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if (count == 0)
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break;
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if (count > (ssize_t) number_pixels)
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return(MagickFalse);
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number_pixels-=count;
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if ((pixel & 0x80) != 0)
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for ( ; count != 0; count--)
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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*q=(*p++);
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*(q+1)=(*p++);
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q+=8;
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}
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else
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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pixel=(size_t) (*p++) << 8;
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pixel|=(*p++);
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for ( ; count != 0; count--)
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{
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*q=(unsigned char) (pixel >> 8);
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*(q+1)=(unsigned char) pixel;
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q+=8;
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}
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}
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}
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return(MagickTrue);
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}
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for ( ; number_pixels > 0; )
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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pixel=(size_t) (*p++);
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count=(ssize_t) (pixel & 0x7f);
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if (count == 0)
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break;
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if (count > (ssize_t) number_pixels)
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return(MagickFalse);
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number_pixels-=count;
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if ((pixel & 0x80) != 0)
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for ( ; count != 0; count--)
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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*q=(*p++);
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q+=4;
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}
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else
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{
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if (number_packets-- == 0)
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return(MagickFalse);
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pixel=(size_t) (*p++);
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for ( ; count != 0; count--)
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{
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*q=(unsigned char) pixel;
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q+=4;
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}
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}
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}
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return(MagickTrue);
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}
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static Image *ReadSGIImage(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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MagickSizeType
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n,
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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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PixelPacket
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*q;
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ssize_t
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i,
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x;
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unsigned char
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*p;
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SGIInfo
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iris_info;
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size_t
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bytes_per_pixel,
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quantum;
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ssize_t
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count,
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y,
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z;
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unsigned char
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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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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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/*
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Read SGI raster header.
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*/
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(void) memset(&iris_info,0,sizeof(iris_info));
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iris_info.magic=ReadBlobMSBShort(image);
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do
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{
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/*
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Verify SGI identifier.
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*/
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if (iris_info.magic != 0x01DA)
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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iris_info.storage=(unsigned char) ReadBlobByte(image);
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switch (iris_info.storage)
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{
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case 0x00: image->compression=NoCompression; break;
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case 0x01: image->compression=RLECompression; break;
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default:
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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}
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iris_info.bytes_per_pixel=(unsigned char) ReadBlobByte(image);
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if ((iris_info.bytes_per_pixel == 0) || (iris_info.bytes_per_pixel > 2))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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iris_info.dimension=ReadBlobMSBShort(image);
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if ((iris_info.dimension == 0) || (iris_info.dimension > 3))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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iris_info.columns=ReadBlobMSBShort(image);
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iris_info.rows=ReadBlobMSBShort(image);
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iris_info.depth=ReadBlobMSBShort(image);
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if ((iris_info.depth == 0) || (iris_info.depth > 4))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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iris_info.minimum_value=ReadBlobMSBLong(image);
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iris_info.maximum_value=ReadBlobMSBLong(image);
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iris_info.sans=ReadBlobMSBLong(image);
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count=ReadBlob(image,sizeof(iris_info.name),(unsigned char *)
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iris_info.name);
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if ((size_t) count != sizeof(iris_info.name))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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iris_info.name[sizeof(iris_info.name)-1]='\0';
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if (*iris_info.name != '\0')
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(void) SetImageProperty(image,"label",iris_info.name);
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iris_info.pixel_format=ReadBlobMSBLong(image);
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if (iris_info.pixel_format != 0)
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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count=ReadBlob(image,sizeof(iris_info.filler),iris_info.filler);
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if ((size_t) count != sizeof(iris_info.filler))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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image->columns=iris_info.columns;
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image->rows=iris_info.rows;
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image->matte=iris_info.depth == 4 ? MagickTrue : MagickFalse;
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image->depth=(size_t) MagickMin(iris_info.depth,MAGICKCORE_QUANTUM_DEPTH);
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if (iris_info.pixel_format == 0)
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image->depth=(size_t) MagickMin((size_t) 8*iris_info.bytes_per_pixel,
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MAGICKCORE_QUANTUM_DEPTH);
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if (iris_info.depth < 3)
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{
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image->storage_class=PseudoClass;
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image->colors=(size_t) (iris_info.bytes_per_pixel > 1 ? 65535 : 256);
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}
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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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if ((MagickSizeType) (image->columns*image->rows/255) > GetBlobSize(image))
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ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");
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status=SetImageExtent(image,image->columns,image->rows);
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if (status != MagickFalse)
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status=ResetImagePixels(image,&image->exception);
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if (status == MagickFalse)
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{
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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 SGI pixels.
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*/
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bytes_per_pixel=(size_t) iris_info.bytes_per_pixel;
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number_pixels=(MagickSizeType) iris_info.columns*iris_info.rows;
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if ((4*bytes_per_pixel*number_pixels) != ((MagickSizeType) (size_t)
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(4*bytes_per_pixel*number_pixels)))
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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pixel_info=AcquireVirtualMemory(iris_info.columns,iris_info.rows*4*
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bytes_per_pixel*sizeof(*pixels));
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if (pixel_info == (MemoryInfo *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
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for (n=0; n < (4*bytes_per_pixel*number_pixels); n++)
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pixels[n]=0;
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if ((int) iris_info.storage != 0x01)
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{
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unsigned char
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*scanline;
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/*
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Read standard image format.
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*/
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scanline=(unsigned char *) AcquireQuantumMemory(iris_info.columns,
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bytes_per_pixel*sizeof(*scanline));
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if (scanline == (unsigned char *) NULL)
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{
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pixel_info=RelinquishVirtualMemory(pixel_info);
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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}
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for (z=0; z < (ssize_t) iris_info.depth; z++)
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{
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p=pixels+bytes_per_pixel*z;
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for (y=0; y < (ssize_t) iris_info.rows; y++)
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{
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count=ReadBlob(image,bytes_per_pixel*iris_info.columns,scanline);
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if (count != (ssize_t) (bytes_per_pixel*iris_info.columns))
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break;
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if (bytes_per_pixel == 2)
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for (x=0; x < (ssize_t) iris_info.columns; x++)
|
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{
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*p=scanline[2*x];
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*(p+1)=scanline[2*x+1];
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p+=8;
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}
|
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else
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for (x=0; x < (ssize_t) iris_info.columns; x++)
|
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{
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||
*p=scanline[x];
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p+=4;
|
||
}
|
||
}
|
||
if (y < (ssize_t) iris_info.rows)
|
||
break;
|
||
}
|
||
scanline=(unsigned char *) RelinquishMagickMemory(scanline);
|
||
}
|
||
else
|
||
{
|
||
MemoryInfo
|
||
*packet_info;
|
||
|
||
size_t
|
||
*runlength;
|
||
|
||
ssize_t
|
||
offset,
|
||
*offsets;
|
||
|
||
unsigned char
|
||
*packets;
|
||
|
||
unsigned int
|
||
data_order;
|
||
|
||
/*
|
||
Read runlength-encoded image format.
|
||
*/
|
||
offsets=(ssize_t *) AcquireQuantumMemory((size_t) iris_info.rows,
|
||
iris_info.depth*sizeof(*offsets));
|
||
runlength=(size_t *) AcquireQuantumMemory(iris_info.rows,
|
||
iris_info.depth*sizeof(*runlength));
|
||
packet_info=AcquireVirtualMemory((size_t) iris_info.columns+10UL,4UL*
|
||
sizeof(*packets));
|
||
if ((offsets == (ssize_t *) NULL) ||
|
||
(runlength == (size_t *) NULL) ||
|
||
(packet_info == (MemoryInfo *) NULL))
|
||
{
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
if (packet_info != (MemoryInfo *) NULL)
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
}
|
||
packets=(unsigned char *) GetVirtualMemoryBlob(packet_info);
|
||
for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
|
||
offsets[i]=(ssize_t) ReadBlobMSBSignedLong(image);
|
||
for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
|
||
{
|
||
runlength[i]=ReadBlobMSBLong(image);
|
||
if (runlength[i] > (4*(size_t) iris_info.columns+10))
|
||
{
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
|
||
}
|
||
}
|
||
/*
|
||
Check data order.
|
||
*/
|
||
offset=0;
|
||
data_order=0;
|
||
for (y=0; ((y < (ssize_t) iris_info.rows) && (data_order == 0)); y++)
|
||
for (z=0; ((z < (ssize_t) iris_info.depth) && (data_order == 0)); z++)
|
||
{
|
||
if (offsets[y+z*iris_info.rows] < offset)
|
||
data_order=1;
|
||
offset=offsets[y+z*iris_info.rows];
|
||
}
|
||
offset=(ssize_t) TellBlob(image);
|
||
if (data_order == 1)
|
||
{
|
||
for (z=0; z < (ssize_t) iris_info.depth; z++)
|
||
{
|
||
p=pixels;
|
||
for (y=0; y < (ssize_t) iris_info.rows; y++)
|
||
{
|
||
if (offset != offsets[y+z*iris_info.rows])
|
||
{
|
||
offset=offsets[y+z*iris_info.rows];
|
||
offset=(ssize_t) SeekBlob(image,(MagickOffsetType) offset,
|
||
SEEK_SET);
|
||
}
|
||
count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows],
|
||
packets);
|
||
if (count != (ssize_t) runlength[y+z*iris_info.rows])
|
||
break;
|
||
offset+=(ssize_t) runlength[y+z*iris_info.rows];
|
||
status=SGIDecode(bytes_per_pixel,(ssize_t)
|
||
(runlength[y+z*iris_info.rows]/bytes_per_pixel),packets,
|
||
(ssize_t) iris_info.columns,p+bytes_per_pixel*z);
|
||
if (status == MagickFalse)
|
||
{
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,
|
||
"ImproperImageHeader");
|
||
}
|
||
p+=(iris_info.columns*4*bytes_per_pixel);
|
||
}
|
||
if (y < (ssize_t) iris_info.rows)
|
||
break;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
MagickOffsetType
|
||
position;
|
||
|
||
position=TellBlob(image);
|
||
p=pixels;
|
||
for (y=0; y < (ssize_t) iris_info.rows; y++)
|
||
{
|
||
for (z=0; z < (ssize_t) iris_info.depth; z++)
|
||
{
|
||
if (offset != offsets[y+z*iris_info.rows])
|
||
{
|
||
offset=offsets[y+z*iris_info.rows];
|
||
offset=(ssize_t) SeekBlob(image,(MagickOffsetType) offset,
|
||
SEEK_SET);
|
||
}
|
||
count=ReadBlob(image,(size_t) runlength[y+z*iris_info.rows],
|
||
packets);
|
||
if (count != (ssize_t) runlength[y+z*iris_info.rows])
|
||
break;
|
||
offset+=(ssize_t) runlength[y+z*iris_info.rows];
|
||
status=SGIDecode(bytes_per_pixel,(ssize_t)
|
||
(runlength[y+z*iris_info.rows]/bytes_per_pixel),packets,
|
||
(ssize_t) iris_info.columns,p+bytes_per_pixel*z);
|
||
if (status == MagickFalse)
|
||
{
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(CorruptImageError,
|
||
"ImproperImageHeader");
|
||
}
|
||
}
|
||
if (z < (ssize_t) iris_info.depth)
|
||
break;
|
||
p+=(iris_info.columns*4*bytes_per_pixel);
|
||
}
|
||
offset=(ssize_t) SeekBlob(image,position,SEEK_SET);
|
||
}
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
}
|
||
/*
|
||
Convert SGI raster image to pixel packets.
|
||
*/
|
||
if (image->storage_class == DirectClass)
|
||
{
|
||
/*
|
||
Convert SGI image to DirectClass pixel packets.
|
||
*/
|
||
if (bytes_per_pixel == 2)
|
||
{
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=pixels+(image->rows-y-1)*8*image->columns;
|
||
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,ScaleShortToQuantum((unsigned short)
|
||
((*(p+0) << 8) | (*(p+1)))));
|
||
SetPixelGreen(q,ScaleShortToQuantum((unsigned short)
|
||
((*(p+2) << 8) | (*(p+3)))));
|
||
SetPixelBlue(q,ScaleShortToQuantum((unsigned short)
|
||
((*(p+4) << 8) | (*(p+5)))));
|
||
SetPixelOpacity(q,OpaqueOpacity);
|
||
if (image->matte != MagickFalse)
|
||
SetPixelAlpha(q,ScaleShortToQuantum((unsigned short)
|
||
((*(p+6) << 8) | (*(p+7)))));
|
||
p+=8;
|
||
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
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=pixels+(image->rows-y-1)*4*image->columns;
|
||
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));
|
||
q->green=ScaleCharToQuantum(*(p+1));
|
||
q->blue=ScaleCharToQuantum(*(p+2));
|
||
SetPixelOpacity(q,OpaqueOpacity);
|
||
if (image->matte != MagickFalse)
|
||
SetPixelAlpha(q,ScaleCharToQuantum(*(p+3)));
|
||
p+=4;
|
||
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 grayscale map.
|
||
*/
|
||
if (AcquireImageColormap(image,image->colors) == MagickFalse)
|
||
{
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
|
||
}
|
||
/*
|
||
Convert SGI image to PseudoClass pixel packets.
|
||
*/
|
||
if (bytes_per_pixel == 2)
|
||
{
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=pixels+(image->rows-y-1)*8*image->columns;
|
||
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++)
|
||
{
|
||
quantum=(*p << 8);
|
||
quantum|=(*(p+1));
|
||
SetPixelIndex(indexes+x,quantum);
|
||
p+=8;
|
||
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
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=pixels+(image->rows-y-1)*4*image->columns;
|
||
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);
|
||
p+=4;
|
||
q++;
|
||
}
|
||
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);
|
||
}
|
||
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;
|
||
iris_info.magic=ReadBlobMSBShort(image);
|
||
if (iris_info.magic == 0x01DA)
|
||
{
|
||
/*
|
||
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 (iris_info.magic == 0x01DA);
|
||
(void) CloseBlob(image);
|
||
if (status == MagickFalse)
|
||
return(DestroyImageList(image));
|
||
return(GetFirstImageInList(image));
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% R e g i s t e r S G I I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% RegisterSGIImage() adds properties for the SGI image format to
|
||
% the list of supported formats. The properties 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 RegisterSGIImage method is:
|
||
%
|
||
% size_t RegisterSGIImage(void)
|
||
%
|
||
*/
|
||
ModuleExport size_t RegisterSGIImage(void)
|
||
{
|
||
MagickInfo
|
||
*entry;
|
||
|
||
entry=SetMagickInfo("SGI");
|
||
entry->decoder=(DecodeImageHandler *) ReadSGIImage;
|
||
entry->encoder=(EncodeImageHandler *) WriteSGIImage;
|
||
entry->magick=(IsImageFormatHandler *) IsSGI;
|
||
entry->description=ConstantString("Irix RGB image");
|
||
entry->magick_module=ConstantString("SGI");
|
||
entry->seekable_stream=MagickTrue;
|
||
(void) RegisterMagickInfo(entry);
|
||
return(MagickImageCoderSignature);
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% U n r e g i s t e r S G I I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% UnregisterSGIImage() removes format registrations made by the
|
||
% SGI module from the list of supported formats.
|
||
%
|
||
% The format of the UnregisterSGIImage method is:
|
||
%
|
||
% UnregisterSGIImage(void)
|
||
%
|
||
*/
|
||
ModuleExport void UnregisterSGIImage(void)
|
||
{
|
||
(void) UnregisterMagickInfo("SGI");
|
||
}
|
||
|
||
/*
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
% %
|
||
% %
|
||
% %
|
||
% W r i t e S G I I m a g e %
|
||
% %
|
||
% %
|
||
% %
|
||
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
|
||
%
|
||
% WriteSGIImage() writes an image in SGI RGB encoded image format.
|
||
%
|
||
% The format of the WriteSGIImage method is:
|
||
%
|
||
% MagickBooleanType WriteSGIImage(const ImageInfo *image_info,Image *image)
|
||
%
|
||
% A description of each parameter follows.
|
||
%
|
||
% o image_info: the image info.
|
||
%
|
||
% o image: The image.
|
||
%
|
||
*/
|
||
|
||
static size_t SGIEncode(unsigned char *pixels,size_t length,
|
||
unsigned char *packets)
|
||
{
|
||
short
|
||
runlength;
|
||
|
||
unsigned char
|
||
*p,
|
||
*q;
|
||
|
||
unsigned char
|
||
*limit,
|
||
*mark;
|
||
|
||
p=pixels;
|
||
limit=p+length*4;
|
||
q=packets;
|
||
while (p < limit)
|
||
{
|
||
mark=p;
|
||
p+=8;
|
||
while ((p < limit) && ((*(p-8) != *(p-4)) || (*(p-4) != *p)))
|
||
p+=4;
|
||
p-=8;
|
||
length=(size_t) (p-mark) >> 2;
|
||
while (length != 0)
|
||
{
|
||
runlength=(short) (length > 126 ? 126 : length);
|
||
length-=runlength;
|
||
*q++=(unsigned char) (0x80 | runlength);
|
||
for ( ; runlength > 0; runlength--)
|
||
{
|
||
*q++=(*mark);
|
||
mark+=4;
|
||
}
|
||
}
|
||
mark=p;
|
||
p+=4;
|
||
while ((p < limit) && (*p == *mark))
|
||
p+=4;
|
||
length=(size_t) (p-mark) >> 2;
|
||
while (length != 0)
|
||
{
|
||
runlength=(short) (length > 126 ? 126 : length);
|
||
length-=runlength;
|
||
*q++=(unsigned char) runlength;
|
||
*q++=(*mark);
|
||
}
|
||
}
|
||
*q++='\0';
|
||
return((size_t) (q-packets));
|
||
}
|
||
|
||
static MagickBooleanType WriteSGIImage(const ImageInfo *image_info,Image *image)
|
||
{
|
||
CompressionType
|
||
compression;
|
||
|
||
const char
|
||
*value;
|
||
|
||
MagickBooleanType
|
||
status;
|
||
|
||
MagickOffsetType
|
||
scene;
|
||
|
||
MagickSizeType
|
||
number_pixels;
|
||
|
||
MemoryInfo
|
||
*pixel_info;
|
||
|
||
SGIInfo
|
||
iris_info;
|
||
|
||
const PixelPacket
|
||
*p;
|
||
|
||
ssize_t
|
||
i,
|
||
x;
|
||
|
||
unsigned char
|
||
*q;
|
||
|
||
size_t
|
||
imageListLength;
|
||
|
||
ssize_t
|
||
y,
|
||
z;
|
||
|
||
unsigned char
|
||
*pixels,
|
||
*packets;
|
||
|
||
/*
|
||
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,&image->exception);
|
||
if (status == MagickFalse)
|
||
return(status);
|
||
scene=0;
|
||
imageListLength=GetImageListLength(image);
|
||
do
|
||
{
|
||
/*
|
||
Initialize SGI raster file header.
|
||
*/
|
||
if ((image->columns > 65535UL) || (image->rows > 65535UL))
|
||
ThrowWriterException(ImageError,"WidthOrHeightExceedsLimit");
|
||
(void) TransformImageColorspace(image,sRGBColorspace);
|
||
(void) memset(&iris_info,0,sizeof(iris_info));
|
||
iris_info.magic=0x01DA;
|
||
compression=image->compression;
|
||
if (image_info->compression != UndefinedCompression)
|
||
compression=image_info->compression;
|
||
if (image->depth > 8)
|
||
compression=NoCompression;
|
||
if (compression == NoCompression)
|
||
iris_info.storage=(unsigned char) 0x00;
|
||
else
|
||
iris_info.storage=(unsigned char) 0x01;
|
||
iris_info.bytes_per_pixel=(unsigned char) (image->depth > 8 ? 2 : 1);
|
||
iris_info.dimension=3;
|
||
iris_info.columns=(unsigned short) image->columns;
|
||
iris_info.rows=(unsigned short) image->rows;
|
||
if (image->matte != MagickFalse)
|
||
iris_info.depth=4;
|
||
else
|
||
{
|
||
if ((image_info->type != TrueColorType) &&
|
||
(SetImageGray(image,&image->exception) != MagickFalse))
|
||
{
|
||
iris_info.dimension=2;
|
||
iris_info.depth=1;
|
||
}
|
||
else
|
||
iris_info.depth=3;
|
||
}
|
||
iris_info.minimum_value=0;
|
||
iris_info.maximum_value=(size_t) (image->depth <= 8 ?
|
||
1UL*ScaleQuantumToChar(QuantumRange) :
|
||
1UL*ScaleQuantumToShort(QuantumRange));
|
||
/*
|
||
Write SGI header.
|
||
*/
|
||
(void) WriteBlobMSBShort(image,iris_info.magic);
|
||
(void) WriteBlobByte(image,iris_info.storage);
|
||
(void) WriteBlobByte(image,iris_info.bytes_per_pixel);
|
||
(void) WriteBlobMSBShort(image,iris_info.dimension);
|
||
(void) WriteBlobMSBShort(image,iris_info.columns);
|
||
(void) WriteBlobMSBShort(image,iris_info.rows);
|
||
(void) WriteBlobMSBShort(image,iris_info.depth);
|
||
(void) WriteBlobMSBLong(image,(unsigned int) iris_info.minimum_value);
|
||
(void) WriteBlobMSBLong(image,(unsigned int) iris_info.maximum_value);
|
||
(void) WriteBlobMSBLong(image,(unsigned int) iris_info.sans);
|
||
value=GetImageProperty(image,"label");
|
||
if (value != (const char *) NULL)
|
||
(void) CopyMagickString(iris_info.name,value,sizeof(iris_info.name));
|
||
(void) WriteBlob(image,sizeof(iris_info.name),(unsigned char *)
|
||
iris_info.name);
|
||
(void) WriteBlobMSBLong(image,(unsigned int) iris_info.pixel_format);
|
||
(void) WriteBlob(image,sizeof(iris_info.filler),iris_info.filler);
|
||
/*
|
||
Allocate SGI pixels.
|
||
*/
|
||
number_pixels=(MagickSizeType) image->columns*image->rows;
|
||
if ((4*iris_info.bytes_per_pixel*number_pixels) !=
|
||
((MagickSizeType) (size_t) (4*iris_info.bytes_per_pixel*number_pixels)))
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
pixel_info=AcquireVirtualMemory((size_t) number_pixels,4*
|
||
iris_info.bytes_per_pixel*sizeof(*pixels));
|
||
if (pixel_info == (MemoryInfo *) NULL)
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
pixels=(unsigned char *) GetVirtualMemoryBlob(pixel_info);
|
||
/*
|
||
Convert image pixels to uncompressed SGI pixels.
|
||
*/
|
||
for (y=0; y < (ssize_t) image->rows; y++)
|
||
{
|
||
p=GetVirtualPixels(image,0,y,image->columns,1,&image->exception);
|
||
if (p == (const PixelPacket *) NULL)
|
||
break;
|
||
if (image->depth <= 8)
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
unsigned char
|
||
*q;
|
||
|
||
q=(unsigned char *) pixels;
|
||
q+=((iris_info.rows-1)-y)*(4*iris_info.columns)+4*x;
|
||
*q++=ScaleQuantumToChar(GetPixelRed(p));
|
||
*q++=ScaleQuantumToChar(GetPixelGreen(p));
|
||
*q++=ScaleQuantumToChar(GetPixelBlue(p));
|
||
*q++=ScaleQuantumToChar(GetPixelAlpha(p));
|
||
p++;
|
||
}
|
||
else
|
||
for (x=0; x < (ssize_t) image->columns; x++)
|
||
{
|
||
unsigned short
|
||
*q;
|
||
|
||
q=(unsigned short *) pixels;
|
||
q+=((iris_info.rows-1)-y)*(4*iris_info.columns)+4*x;
|
||
*q++=ScaleQuantumToShort(GetPixelRed(p));
|
||
*q++=ScaleQuantumToShort(GetPixelGreen(p));
|
||
*q++=ScaleQuantumToShort(GetPixelBlue(p));
|
||
*q++=ScaleQuantumToShort(GetPixelAlpha(p));
|
||
p++;
|
||
}
|
||
if (image->previous == (Image *) NULL)
|
||
{
|
||
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
|
||
image->rows);
|
||
if (status == MagickFalse)
|
||
break;
|
||
}
|
||
}
|
||
switch (compression)
|
||
{
|
||
case NoCompression:
|
||
{
|
||
/*
|
||
Write uncompressed SGI pixels.
|
||
*/
|
||
for (z=0; z < (ssize_t) iris_info.depth; z++)
|
||
{
|
||
for (y=0; y < (ssize_t) iris_info.rows; y++)
|
||
{
|
||
if (image->depth <= 8)
|
||
for (x=0; x < (ssize_t) iris_info.columns; x++)
|
||
{
|
||
unsigned char
|
||
*q;
|
||
|
||
q=(unsigned char *) pixels;
|
||
q+=y*(4*iris_info.columns)+4*x+z;
|
||
(void) WriteBlobByte(image,*q);
|
||
}
|
||
else
|
||
for (x=0; x < (ssize_t) iris_info.columns; x++)
|
||
{
|
||
unsigned short
|
||
*q;
|
||
|
||
q=(unsigned short *) pixels;
|
||
q+=y*(4*iris_info.columns)+4*x+z;
|
||
(void) WriteBlobMSBShort(image,*q);
|
||
}
|
||
}
|
||
}
|
||
break;
|
||
}
|
||
default:
|
||
{
|
||
MemoryInfo
|
||
*packet_info;
|
||
|
||
size_t
|
||
length,
|
||
number_packets,
|
||
*runlength;
|
||
|
||
ssize_t
|
||
offset,
|
||
*offsets;
|
||
|
||
/*
|
||
Convert SGI uncompressed pixels.
|
||
*/
|
||
offsets=(ssize_t *) AcquireQuantumMemory(iris_info.rows,
|
||
iris_info.depth*sizeof(*offsets));
|
||
runlength=(size_t *) AcquireQuantumMemory(iris_info.rows,
|
||
iris_info.depth*sizeof(*runlength));
|
||
packet_info=AcquireVirtualMemory((2*(size_t) iris_info.columns+10)*
|
||
image->rows,4*sizeof(*packets));
|
||
if ((offsets == (ssize_t *) NULL) ||
|
||
(runlength == (size_t *) NULL) ||
|
||
(packet_info == (MemoryInfo *) NULL))
|
||
{
|
||
if (offsets != (ssize_t *) NULL)
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
if (runlength != (size_t *) NULL)
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
if (packet_info != (MemoryInfo *) NULL)
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
|
||
}
|
||
packets=(unsigned char *) GetVirtualMemoryBlob(packet_info);
|
||
offset=512+4*2*((ssize_t) iris_info.rows*iris_info.depth);
|
||
number_packets=0;
|
||
q=pixels;
|
||
for (y=0; y < (ssize_t) iris_info.rows; y++)
|
||
{
|
||
for (z=0; z < (ssize_t) iris_info.depth; z++)
|
||
{
|
||
length=SGIEncode(q+z,(size_t) iris_info.columns,packets+
|
||
number_packets);
|
||
number_packets+=length;
|
||
offsets[y+z*iris_info.rows]=offset;
|
||
runlength[y+z*iris_info.rows]=(size_t) length;
|
||
offset+=(ssize_t) length;
|
||
}
|
||
q+=(iris_info.columns*4);
|
||
}
|
||
/*
|
||
Write out line start and length tables and runlength-encoded pixels.
|
||
*/
|
||
for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
|
||
(void) WriteBlobMSBLong(image,(unsigned int) offsets[i]);
|
||
for (i=0; i < (ssize_t) (iris_info.rows*iris_info.depth); i++)
|
||
(void) WriteBlobMSBLong(image,(unsigned int) runlength[i]);
|
||
(void) WriteBlob(image,number_packets,packets);
|
||
/*
|
||
Relinquish resources.
|
||
*/
|
||
offsets=(ssize_t *) RelinquishMagickMemory(offsets);
|
||
runlength=(size_t *) RelinquishMagickMemory(runlength);
|
||
packet_info=RelinquishVirtualMemory(packet_info);
|
||
break;
|
||
}
|
||
}
|
||
pixel_info=RelinquishVirtualMemory(pixel_info);
|
||
if (GetNextImageInList(image) == (Image *) NULL)
|
||
break;
|
||
image=SyncNextImageInList(image);
|
||
status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength);
|
||
if (status == MagickFalse)
|
||
break;
|
||
} while (image_info->adjoin != MagickFalse);
|
||
(void) CloseBlob(image);
|
||
return(MagickTrue);
|
||
}
|