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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% OOO TTTTT BBBB %
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% O O T B B %
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% O O T BBBB %
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% O O T B B %
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% OOO T BBBB %
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% %
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% %
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% Read/Write On-The-Air Image Format %
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% %
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% Software Design %
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% Cristy %
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% January 2000 %
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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/attribute.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/color-private.h"
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#include "MagickCore/colormap.h"
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#include "MagickCore/colorspace.h"
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#include "MagickCore/colorspace-private.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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Forward declarations.
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*/
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static MagickBooleanType
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WriteOTBImage(const ImageInfo *,Image *,ExceptionInfo *);
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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 O T B 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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% ReadOTBImage() reads a on-the-air (level 0) bitmap 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 ReadOTBImage method is:
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%
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% Image *ReadOTBImage(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 *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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#define GetBit(a,i) (((a) >> (i)) & 1L)
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Image
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*image;
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int
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byte;
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MagickBooleanType
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status;
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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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ssize_t
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y;
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unsigned char
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bit,
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info,
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depth;
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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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Initialize image structure.
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*/
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info=(unsigned char) ReadBlobByte(image);
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if (GetBit(info,4) == 0)
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{
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image->columns=(size_t) ReadBlobByte(image);
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image->rows=(size_t) ReadBlobByte(image);
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}
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else
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{
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image->columns=(size_t) ReadBlobMSBShort(image);
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image->rows=(size_t) ReadBlobMSBShort(image);
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}
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if ((image->columns == 0) || (image->rows == 0))
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ThrowReaderException(CorruptImageError,"ImproperImageHeader");
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depth=(unsigned char) ReadBlobByte(image);
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if (depth != 1)
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ThrowReaderException(CoderError,"OnlyLevelZerofilesSupported");
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if (AcquireImageColormap(image,2,exception) == MagickFalse)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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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,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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/*
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Convert bi-level image to pixel packets.
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*/
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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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bit=0;
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byte=0;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if (bit == 0)
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{
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byte=ReadBlobByte(image);
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if (byte == EOF)
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ThrowReaderException(CorruptImageError,"CorruptImage");
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}
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SetPixelIndex(image,(byte & (0x01 << (7-bit))) ? 0x00 : 0x01,q);
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bit++;
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if (bit == 8)
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bit=0;
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q+=GetPixelChannels(image);
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}
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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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(void) SyncImage(image,exception);
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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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/*
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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 O T B 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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% RegisterOTBImage() adds attributes for the OTB 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 RegisterOTBImage method is:
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%
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% size_t RegisterOTBImage(void)
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%
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*/
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ModuleExport size_t RegisterOTBImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("OTB","OTB","On-the-air bitmap");
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entry->decoder=(DecodeImageHandler *) ReadOTBImage;
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entry->encoder=(EncodeImageHandler *) WriteOTBImage;
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entry->flags^=CoderAdjoinFlag;
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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 O T B 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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% UnregisterOTBImage() removes format registrations made by the
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% OTB module from the list of supported formats.
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%
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% The format of the UnregisterOTBImage method is:
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%
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% UnregisterOTBImage(void)
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%
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*/
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ModuleExport void UnregisterOTBImage(void)
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{
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(void) UnregisterMagickInfo("OTB");
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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 O T B 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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% WriteOTBImage() writes an image to a file in the On-the-air Bitmap
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% (level 0) image format.
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%
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% The format of the WriteOTBImage method is:
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%
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% MagickBooleanType WriteOTBImage(const ImageInfo *image_info,
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% Image *image,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 image: The image.
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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 WriteOTBImage(const ImageInfo *image_info,Image *image,
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ExceptionInfo *exception)
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{
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#define SetBit(a,i,set) \
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a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i)))
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MagickBooleanType
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status;
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const Quantum
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*p;
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ssize_t
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x;
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ssize_t
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y;
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unsigned char
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bit,
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byte,
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info;
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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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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
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if (status == MagickFalse)
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return(status);
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(void) TransformImageColorspace(image,sRGBColorspace,exception);
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/*
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Convert image to a bi-level image.
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*/
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(void) SetImageType(image,BilevelType,exception);
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info=0;
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if ((image->columns >= 256) || (image->rows >= 256))
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SetBit(info,4,1);
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(void) WriteBlobByte(image,info);
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if ((image->columns >= 256) || (image->rows >= 256))
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{
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(void) WriteBlobMSBShort(image,(unsigned short) image->columns);
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(void) WriteBlobMSBShort(image,(unsigned short) image->rows);
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}
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else
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{
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(void) WriteBlobByte(image,(unsigned char) image->columns);
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(void) WriteBlobByte(image,(unsigned char) image->rows);
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}
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(void) WriteBlobByte(image,1); /* depth */
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for (y=0; y < (ssize_t) image->rows; y++)
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{
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p=GetVirtualPixels(image,0,y,image->columns,1,exception);
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if (p == (const Quantum *) NULL)
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break;
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bit=0;
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byte=0;
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for (x=0; x < (ssize_t) image->columns; x++)
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{
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if (GetPixelLuma(image,p) < (QuantumRange/2.0))
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byte|=0x1 << (7-bit);
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bit++;
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if (bit == 8)
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{
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(void) WriteBlobByte(image,byte);
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bit=0;
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byte=0;
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}
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p+=GetPixelChannels(image);
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}
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if (bit != 0)
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(void) WriteBlobByte(image,byte);
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if (image->previous == (Image *) NULL)
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{
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status=SetImageProgress(image,SaveImageTag,(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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(void) CloseBlob(image);
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return(MagickTrue);
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}
|
