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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% PPPP IIIII X X %
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% P P I X X %
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% PPPP I X %
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% P I X X %
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% P IIIII X X %
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% %
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% %
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% Read Alias/Wavefront 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 "MagickCore/studio.h"
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#include "MagickCore/blob.h"
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#include "MagickCore/blob-private.h"
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#include "MagickCore/cache.h"
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#include "MagickCore/colormap.h"
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#include "MagickCore/exception.h"
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#include "MagickCore/exception-private.h"
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#include "MagickCore/image.h"
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#include "MagickCore/image-private.h"
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#include "MagickCore/list.h"
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#include "MagickCore/magick.h"
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#include "MagickCore/memory_.h"
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#include "MagickCore/monitor.h"
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#include "MagickCore/monitor-private.h"
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#include "MagickCore/pixel-accessor.h"
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#include "MagickCore/quantum-private.h"
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#include "MagickCore/static.h"
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#include "MagickCore/string_.h"
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#include "MagickCore/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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% R e a d P I X 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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% ReadPIXImage() reads a Alias/Wavefront RLE image file and returns it.
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% It 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 ReadPIXImage method is:
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%
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% Image *ReadPIXImage(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 *ReadPIXImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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Image
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*image;
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MagickBooleanType
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status;
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Quantum
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blue,
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green,
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index,
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red;
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ssize_t
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x;
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Quantum
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*q;
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size_t
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bits_per_pixel,
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height,
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length,
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width;
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ssize_t
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y;
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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,exception);
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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 PIX image.
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*/
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width=ReadBlobMSBShort(image);
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height=ReadBlobMSBShort(image);
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(void) ReadBlobMSBShort(image); /* x-offset */
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(void) ReadBlobMSBShort(image); /* y-offset */
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bits_per_pixel=ReadBlobMSBShort(image);
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if ((width == 0UL) || (height == 0UL) || ((bits_per_pixel != 8) &&
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(bits_per_pixel != 24)))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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do
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{
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/*
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Initialize image structure.
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*/
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image->columns=width;
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image->rows=height;
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if (bits_per_pixel == 8)
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if (AcquireImageColormap(image,256,exception) == MagickFalse)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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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,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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status=ResetImagePixels(image,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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/*
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Convert PIX raster image to pixel packets.
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*/
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red=(Quantum) 0;
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green=(Quantum) 0;
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blue=(Quantum) 0;
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index=0;
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length=0;
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
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if (q == (Quantum *) NULL)
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break;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if (length == 0)
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{
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int
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c;
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c=ReadBlobByte(image);
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if ((c == 0) || (c == EOF))
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break;
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length=(size_t) c;
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if (bits_per_pixel == 8)
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index=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
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else
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{
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blue=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
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green=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
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red=ScaleCharToQuantum((unsigned char) ReadBlobByte(image));
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}
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}
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if (image->storage_class == PseudoClass)
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SetPixelIndex(image,index,q);
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SetPixelBlue(image,blue,q);
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SetPixelGreen(image,green,q);
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SetPixelRed(image,red,q);
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length--;
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q+=GetPixelChannels(image);
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}
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if (x < (ssize_t) image->columns)
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break;
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if (SyncAuthenticPixels(image,exception) == MagickFalse)
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break;
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if (image->previous == (Image *) NULL)
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{
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status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
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image->rows);
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if (status == MagickFalse)
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break;
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}
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}
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if (image->storage_class == PseudoClass)
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(void) SyncImage(image,exception);
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if (EOFBlob(image) != MagickFalse)
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{
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ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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image->filename);
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break;
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}
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/*
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Proceed to next image.
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*/
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if (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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width=ReadBlobMSBLong(image);
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height=ReadBlobMSBLong(image);
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(void) ReadBlobMSBShort(image);
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(void) ReadBlobMSBShort(image);
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bits_per_pixel=ReadBlobMSBShort(image);
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status=(width != 0UL) && (height == 0UL) && ((bits_per_pixel == 8) ||
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(bits_per_pixel == 24)) ? MagickTrue : MagickFalse;
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if (status != MagickFalse)
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{
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/*
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Allocate next image structure.
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*/
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AcquireNextImage(image_info,image,exception);
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if (GetNextImageInList(image) == (Image *) NULL)
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{
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status=MagickFalse;
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break;
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}
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image=SyncNextImageInList(image);
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status=SetImageProgress(image,LoadImagesTag,TellBlob(image),
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GetBlobSize(image));
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if (status == MagickFalse)
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break;
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}
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} while (status != MagickFalse);
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(void) CloseBlob(image);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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return(GetFirstImageInList(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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% %
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% R e g i s t e r P I X 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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% RegisterPIXImage() adds attributes for the PIX image format to
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% the list of supported formats. The attributes include the image format
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% tag, a method to read and/or write the format, whether the format
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% supports the saving of more than one frame to the same file or blob,
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% whether the format supports native in-memory I/O, and a brief
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% description of the format.
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%
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% The format of the RegisterPIXImage method is:
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%
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% size_t RegisterPIXImage(void)
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%
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*/
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ModuleExport size_t RegisterPIXImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("PIX","PIX","Alias/Wavefront RLE image format");
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entry->decoder=(DecodeImageHandler *) ReadPIXImage;
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(void) RegisterMagickInfo(entry);
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return(MagickImageCoderSignature);
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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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% U n r e g i s t e r P I X 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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% UnregisterPIXImage() removes format registrations made by the
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% PIX module from the list of supported formats.
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%
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% The format of the UnregisterPIXImage method is:
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%
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% UnregisterPIXImage(void)
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%
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*/
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ModuleExport void UnregisterPIXImage(void)
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{
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(void) UnregisterMagickInfo("PIX");
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}
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