forked from openkylin/imagemagick
407 lines
15 KiB
C
407 lines
15 KiB
C
/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% FFFFF AAA X X %
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% F A A X X %
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% FFF AAAAA X %
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% F A A X X %
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% F A A X X %
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% %
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% %
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% Read/Write Group 3 Fax 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/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/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/compress.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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Forward declarations.
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*/
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static MagickBooleanType
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WriteFAXImage(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 F A X %
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% %
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% %
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% %
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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%
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% IsFAX() returns MagickTrue if the image format type, identified by the
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% magick string, is FAX.
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%
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% The format of the IsFAX method is:
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%
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% MagickBooleanType IsFAX(const unsigned char *magick,const size_t length)
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%
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% A description of each parameter follows:
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%
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% o magick: compare image format pattern against these bytes.
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%
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% o length: Specifies the length of the magick string.
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%
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%
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*/
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static MagickBooleanType IsFAX(const unsigned char *magick,const size_t length)
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{
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if (length < 4)
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return(MagickFalse);
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if (LocaleNCompare((char *) magick,"DFAX",4) == 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 F A 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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% ReadFAXImage() reads a Group 3 FAX 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 ReadFAXImage method is:
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%
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% Image *ReadFAXImage(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* FaxReadG3(Image *image,ExceptionInfo *exception)
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{
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MagickBooleanType
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status;
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status=HuffmanDecodeImage(image);
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if (status == MagickFalse)
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ThrowFileException(exception,CorruptImageError,"UnableToReadImageData",
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image->filename);
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if (EOFBlob(image) != MagickFalse)
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ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
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image->filename);
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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}
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static Image* FaxReadG4(Image *image,const ImageInfo *image_info,
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ExceptionInfo *exception)
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{
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char
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filename[MaxTextExtent];
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ImageInfo
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*read_info;
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filename[0]='\0';
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if (ImageToFile(image,filename,exception) == MagickFalse)
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ThrowImageException(FileOpenError,"UnableToCreateTemporaryFile");
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(void) CloseBlob(image);
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image=DestroyImage(image);
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read_info=CloneImageInfo(image_info);
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SetImageInfoBlob(read_info,(void *) NULL,0);
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(void) FormatLocaleString(read_info->filename,MaxTextExtent,"group4:%s",
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filename);
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read_info->orientation=TopLeftOrientation;
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image=ReadImage(read_info,exception);
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if (image != (Image *) NULL)
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{
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(void) CopyMagickString(image->filename,image_info->filename,
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MaxTextExtent);
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(void) CopyMagickString(image->magick_filename,image_info->filename,
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MaxTextExtent);
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(void) CopyMagickString(image->magick,"G4",MaxTextExtent);
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}
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read_info=DestroyImageInfo(read_info);
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(void) RelinquishUniqueFileResource(filename);
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return(GetFirstImageInList(image));
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}
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static Image *ReadFAXImage(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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/*
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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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Initialize image structure.
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*/
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image->storage_class=PseudoClass;
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if (image->columns == 0)
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image->columns=2592;
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if (image->rows == 0)
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image->rows=3508;
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image->depth=8;
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if (AcquireImageColormap(image,2) == MagickFalse)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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/*
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Monochrome colormap.
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*/
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image->colormap[0].red=QuantumRange;
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image->colormap[0].green=QuantumRange;
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image->colormap[0].blue=QuantumRange;
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image->colormap[1].red=(Quantum) 0;
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image->colormap[1].green=(Quantum) 0;
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image->colormap[1].blue=(Quantum) 0;
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if (image_info->ping != MagickFalse)
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{
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(void) CloseBlob(image);
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return(GetFirstImageInList(image));
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}
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status=SetImageExtent(image,image->columns,image->rows);
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if (status == MagickFalse)
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{
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InheritException(exception,&image->exception);
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return(DestroyImageList(image));
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}
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if (LocaleCompare(image_info->magick,"G4") == 0)
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return(FaxReadG4(image,image_info,exception));
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else
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return(FaxReadG3(image,exception));
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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 F A 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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% RegisterFAXImage() adds attributes for the FAX 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 RegisterFAXImage method is:
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%
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% size_t RegisterFAXImage(void)
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%
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*/
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ModuleExport size_t RegisterFAXImage(void)
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{
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MagickInfo
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*entry;
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static const char
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*Note=
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{
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"FAX machines use non-square pixels which are 1.5 times wider than\n"
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"they are tall but computer displays use square pixels, therefore\n"
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"FAX images may appear to be narrow unless they are explicitly\n"
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"resized using a geometry of \"150x100%\".\n"
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};
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entry=SetMagickInfo("FAX");
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entry->decoder=(DecodeImageHandler *) ReadFAXImage;
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entry->encoder=(EncodeImageHandler *) WriteFAXImage;
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entry->magick=(IsImageFormatHandler *) IsFAX;
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entry->description=ConstantString("Group 3 FAX");
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entry->note=ConstantString(Note);
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entry->magick_module=ConstantString("FAX");
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(void) RegisterMagickInfo(entry);
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entry=SetMagickInfo("G3");
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entry->decoder=(DecodeImageHandler *) ReadFAXImage;
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entry->encoder=(EncodeImageHandler *) WriteFAXImage;
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entry->magick=(IsImageFormatHandler *) IsFAX;
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entry->adjoin=MagickFalse;
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entry->description=ConstantString("Group 3 FAX");
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entry->magick_module=ConstantString("FAX");
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(void) RegisterMagickInfo(entry);
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entry=SetMagickInfo("G4");
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entry->decoder=(DecodeImageHandler *) ReadFAXImage;
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entry->encoder=(EncodeImageHandler *) WriteFAXImage;
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entry->magick=(IsImageFormatHandler *) IsFAX;
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entry->adjoin=MagickFalse;
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entry->description=ConstantString("Group 4 FAX");
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entry->magick_module=ConstantString("FAX");
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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 F A 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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% UnregisterFAXImage() removes format registrations made by the
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% FAX module from the list of supported formats.
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%
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% The format of the UnregisterFAXImage method is:
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%
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% UnregisterFAXImage(void)
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%
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*/
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ModuleExport void UnregisterFAXImage(void)
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{
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(void) UnregisterMagickInfo("FAX");
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(void) UnregisterMagickInfo("G3");
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(void) UnregisterMagickInfo("G4");
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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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% W r i t e F A 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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% WriteFAXImage() writes an image to a file in 1 dimensional Huffman encoded
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% format.
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%
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% The format of the WriteFAXImage method is:
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%
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% MagickBooleanType WriteFAXImage(const ImageInfo *image_info,Image *image)
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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 image: The image.
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%
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*/
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static MagickBooleanType WriteFAXImage(const ImageInfo *image_info,Image *image)
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{
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ImageInfo
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*write_info;
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MagickBooleanType
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status;
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MagickOffsetType
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scene;
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size_t
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imageListLength;
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/*
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Open output 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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assert(image != (Image *) NULL);
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assert(image->signature == MagickCoreSignature);
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if (image->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
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if (status == MagickFalse)
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return(status);
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write_info=CloneImageInfo(image_info);
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(void) CopyMagickString(write_info->magick,"FAX",MaxTextExtent);
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scene=0;
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imageListLength=GetImageListLength(image);
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do
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{
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/*
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Convert MIFF to monochrome.
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*/
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(void) TransformImageColorspace(image,sRGBColorspace);
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status=HuffmanEncodeImage(write_info,image,image);
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if (GetNextImageInList(image) == (Image *) NULL)
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break;
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image=SyncNextImageInList(image);
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status=SetImageProgress(image,SaveImagesTag,scene++,imageListLength);
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if (status == MagickFalse)
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break;
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} while (write_info->adjoin != MagickFalse);
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write_info=DestroyImageInfo(write_info);
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(void) CloseBlob(image);
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return(status);
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}
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