forked from openkylin/imagemagick
353 lines
13 KiB
C
353 lines
13 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% PPPP W W PPPP %
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% P P W W P P %
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% PPPP W W PPPP %
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% P W W W P %
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% P W W P %
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% %
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% %
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% Read Seattle Film Works 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/constitute.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/resource_.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 P W P %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsPWP() returns MagickTrue if the image format type, identified by the
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% magick string, is PWP.
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%
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% The format of the IsPWP method is:
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%
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% MagickBooleanType IsPWP(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 IsPWP(const unsigned char *magick,const size_t length)
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{
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if (length < 5)
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return(MagickFalse);
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if (LocaleNCompare((char *) magick,"SFW95",5) == 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 P W P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% ReadPWPImage() reads a Seattle Film Works multi-image file and returns
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% it. It allocates the memory necessary for the new Image structure and
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% returns a pointer to the new image.
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%
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% The format of the ReadPWPImage method is:
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%
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% Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
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%
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% A description of each parameter follows:
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%
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% o image_info: the image info.
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%
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% o exception: return any errors or warnings in this structure.
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%
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*/
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static Image *ReadPWPImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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char
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filename[MaxTextExtent];
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FILE
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*file;
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Image
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*image,
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*next_image,
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*pwp_image;
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ImageInfo
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*read_info;
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int
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c,
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unique_file;
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MagickBooleanType
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status;
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Image
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*p;
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ssize_t
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i;
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size_t
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filesize,
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length;
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ssize_t
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count;
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unsigned char
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magick[MaxTextExtent];
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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=DestroyImage(image);
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return((Image *) NULL);
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}
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pwp_image=image;
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memset(magick,0,sizeof(magick));
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count=ReadBlob(pwp_image,5,magick);
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if ((count != 5) || (LocaleNCompare((char *) magick,"SFW95",5) != 0))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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read_info=CloneImageInfo(image_info);
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(void) SetImageInfoProgressMonitor(read_info,(MagickProgressMonitor) NULL,
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(void *) NULL);
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SetImageInfoBlob(read_info,(void *) NULL,0);
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unique_file=AcquireUniqueFileResource(filename);
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(void) FormatLocaleString(read_info->filename,MagickPathExtent,"sfw:%s",
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filename);
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for ( ; ; )
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{
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(void) memset(magick,0,sizeof(magick));
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for (c=ReadBlobByte(pwp_image); c != EOF; c=ReadBlobByte(pwp_image))
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{
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for (i=0; i < 17; i++)
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magick[i]=magick[i+1];
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magick[17]=(unsigned char) c;
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if (LocaleNCompare((char *) (magick+12),"SFW94A",6) == 0)
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break;
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}
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if (c == EOF)
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{
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(void) RelinquishUniqueFileResource(filename);
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read_info=DestroyImageInfo(read_info);
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ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
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}
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if (LocaleNCompare((char *) (magick+12),"SFW94A",6) != 0)
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{
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(void) RelinquishUniqueFileResource(filename);
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read_info=DestroyImageInfo(read_info);
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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}
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/*
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Dump SFW image to a temporary file.
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*/
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file=(FILE *) NULL;
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if (unique_file != -1)
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file=fdopen(unique_file,"wb");
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if ((unique_file == -1) || (file == (FILE *) NULL))
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{
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(void) RelinquishUniqueFileResource(filename);
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read_info=DestroyImageInfo(read_info);
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ThrowFileException(exception,FileOpenError,"UnableToWriteFile",
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image->filename);
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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length=fwrite("SFW94A",1,6,file);
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(void) length;
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filesize=65535UL*magick[2]+256L*magick[1]+magick[0];
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for (i=0; i < (ssize_t) filesize; i++)
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{
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c=ReadBlobByte(pwp_image);
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if (c == EOF)
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break;
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if (fputc(c,file) != c)
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break;
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}
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(void) fclose(file);
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if (c == EOF)
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{
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(void) RelinquishUniqueFileResource(filename);
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read_info=DestroyImageInfo(read_info);
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ThrowReaderException(CorruptImageError,"UnexpectedEndOfFile");
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}
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next_image=ReadImage(read_info,exception);
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if (next_image == (Image *) NULL)
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break;
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(void) FormatLocaleString(next_image->filename,MaxTextExtent,
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"slide_%02ld.sfw",(long) next_image->scene);
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if (image == (Image *) NULL)
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image=next_image;
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else
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{
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/*
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Link image into image list.
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*/
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for (p=image; p->next != (Image *) NULL; p=GetNextImageInList(p)) ;
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next_image->previous=p;
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next_image->scene=p->scene+1;
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p->next=next_image;
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}
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if (image_info->number_scenes != 0)
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if (next_image->scene >= (image_info->scene+image_info->number_scenes-1))
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break;
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status=SetImageProgress(image,LoadImagesTag,TellBlob(pwp_image),
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GetBlobSize(pwp_image));
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if (status == MagickFalse)
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break;
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}
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if (unique_file != -1)
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(void) close(unique_file);
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(void) RelinquishUniqueFileResource(filename);
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read_info=DestroyImageInfo(read_info);
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if (image != (Image *) NULL)
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{
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if (EOFBlob(image) != MagickFalse)
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{
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char
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*message;
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message=GetExceptionMessage(errno);
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(void) ThrowMagickException(exception,GetMagickModule(),
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CorruptImageError,"UnexpectedEndOfFile","`%s': %s",image->filename,
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message);
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message=DestroyString(message);
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}
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(void) CloseBlob(image);
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}
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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 W P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% RegisterPWPImage() adds attributes for the PWP 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 RegisterPWPImage method is:
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%
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% size_t RegisterPWPImage(void)
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%
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*/
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ModuleExport size_t RegisterPWPImage(void)
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{
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MagickInfo
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*entry;
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entry=SetMagickInfo("PWP");
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entry->decoder=(DecodeImageHandler *) ReadPWPImage;
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entry->magick=(IsImageFormatHandler *) IsPWP;
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entry->description=ConstantString("Seattle Film Works");
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entry->magick_module=ConstantString("PWP");
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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 W P I m a g e %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% UnregisterPWPImage() removes format registrations made by the
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% PWP module from the list of supported formats.
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%
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% The format of the UnregisterPWPImage method is:
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%
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% UnregisterPWPImage(void)
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%
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*/
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ModuleExport void UnregisterPWPImage(void)
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{
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(void) UnregisterMagickInfo("PWP");
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}
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