/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d F A X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadFAXImage() reads a Group 3 FAX image file and returns it. It % allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadFAXImage method is: % % Image *ReadFAXImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: the image info. % % o exception: return any errors or warnings in this structure. % */ static Image *ReadFAXImage(const ImageInfo *image_info,ExceptionInfo *exception) { Image *image; MagickBooleanType status; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); if (image_info->debug != MagickFalse) (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s", image_info->filename); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AcquireImage(image_info,exception); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == MagickFalse) { image=DestroyImageList(image); return((Image *) NULL); } /* Initialize image structure. */ image->storage_class=PseudoClass; if (image->columns == 0) image->columns=2592; if (image->rows == 0) image->rows=3508; image->depth=8; if (AcquireImageColormap(image,2,exception) == MagickFalse) ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed"); /* Monochrome colormap. */ image->colormap[0].red=QuantumRange; image->colormap[0].green=QuantumRange; image->colormap[0].blue=QuantumRange; image->colormap[1].red=(Quantum) 0; image->colormap[1].green=(Quantum) 0; image->colormap[1].blue=(Quantum) 0; if (image_info->ping != MagickFalse) { (void) CloseBlob(image); return(GetFirstImageInList(image)); } status=HuffmanDecodeImage(image,exception); if (status == MagickFalse) ThrowReaderException(CorruptImageError,"UnableToReadImageData"); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); }
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d F A X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % Method ReadFAXImage reads a Group 3 FAX image file and returns it. It % allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadFAXImage method is: % % Image *ReadFAXImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image: Method ReadFAXImage returns a pointer to the image after % reading. A null image is returned if there is a memory shortage or % if the image cannot be read. % % o image_info: Specifies a pointer to a ImageInfo structure. % % o exception: return any errors or warnings in this structure. % % */ static Image *ReadFAXImage(const ImageInfo *image_info,ExceptionInfo *exception) { Image *image; unsigned int status; /* Open image file. */ assert(image_info != (const ImageInfo *) NULL); assert(image_info->signature == MagickSignature); assert(exception != (ExceptionInfo *) NULL); assert(exception->signature == MagickSignature); image=AllocateImage(image_info); status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception); if (status == False) ThrowReaderException(FileOpenError,UnableToOpenFile,image); /* Initialize image structure. */ image->storage_class=PseudoClass; if (image->columns == 0) image->columns=2592; if (image->rows == 0) image->rows=3508; image->depth=8; if (!AllocateImageColormap(image,2)) ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image); /* Monochrome colormap. */ image->colormap[0].red=MaxRGB; image->colormap[0].green=MaxRGB; image->colormap[0].blue=MaxRGB; image->colormap[1].red=0; image->colormap[1].green=0; image->colormap[1].blue=0; if (image_info->ping) { CloseBlob(image); return(image); } if (CheckImagePixelLimits(image, exception) != MagickPass) ThrowReaderException(ResourceLimitError,ImagePixelLimitExceeded,image); status=HuffmanDecodeImage(image); if (status == False) ThrowReaderException(CorruptImageError,UnableToReadImageData,image); if (EOFBlob(image)) ThrowException(exception,CorruptImageError,UnexpectedEndOfFile, image->filename); CloseBlob(image); return(image); }
/* %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % % % % % % R e a d F A X I m a g e % % % % % % % %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%% % % ReadFAXImage() reads a Group 3 FAX image file and returns it. It % allocates the memory necessary for the new Image structure and returns a % pointer to the new image. % % The format of the ReadFAXImage method is: % % Image *ReadFAXImage(const ImageInfo *image_info,ExceptionInfo *exception) % % A description of each parameter follows: % % o image_info: the image info. % % o exception: return any errors or warnings in this structure. % */ static Image* FaxReadG3(Image *image,ExceptionInfo *exception) { MagickBooleanType status; status=HuffmanDecodeImage(image,exception); if (status == MagickFalse) ThrowFileException(exception,CorruptImageError,"UnableToReadImageData", image->filename); if (EOFBlob(image) != MagickFalse) ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile", image->filename); (void) CloseBlob(image); return(GetFirstImageInList(image)); }