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/*
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%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
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% %
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% %
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% %
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% RRRR GGG FFFFF %
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% R R G F %
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% RRRR G GG FFF %
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% R R G G F %
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% R R GGG F %
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% %
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% %
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% Read/Write LEGO Mindstorms EV3 Robot Graphics File %
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% %
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% Software Design %
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% Brian Wheeler %
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% August 2013 %
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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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#include "MagickCore/utility.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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WriteRGFImage(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 X B M 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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% ReadRGFImage() reads an RGF bitmap 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 ReadRGFImage method is:
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%
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% Image *ReadRGFImage(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 *ReadRGFImage(const ImageInfo *image_info,ExceptionInfo *exception)
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{
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Image
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*image;
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int
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bit;
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MagickBooleanType
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status;
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ssize_t
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i,
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x;
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Quantum
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*q;
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unsigned char
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*p;
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ssize_t
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y;
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unsigned char
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byte,
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*data;
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/*
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Open image file.
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*/
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assert(image_info != (const ImageInfo *) NULL);
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assert(image_info->signature == MagickCoreSignature);
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if (image_info->debug != MagickFalse)
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(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
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image_info->filename);
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assert(exception != (ExceptionInfo *) NULL);
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assert(exception->signature == MagickCoreSignature);
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image=AcquireImage(image_info,exception);
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status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
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if (status == MagickFalse)
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{
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image=DestroyImageList(image);
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return((Image *) NULL);
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}
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/*
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Read RGF header.
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*/
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image->columns = (unsigned long) ReadBlobByte(image);
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image->rows = (unsigned long) ReadBlobByte(image);
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image->depth=8;
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image->storage_class=PseudoClass;
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image->colors=2;
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/*
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Initialize image structure.
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*/
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if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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/*
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Initialize 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,exception);
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if (status == MagickFalse)
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return(DestroyImageList(image));
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/*
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Read hex image data.
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*/
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data=(unsigned char *) AcquireQuantumMemory(image->rows,image->columns*
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sizeof(*data));
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if (data == (unsigned char *) NULL)
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ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
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p=data;
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for (i=0; i < (ssize_t) (image->columns * image->rows); i++)
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{
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*p++=ReadBlobByte(image);
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}
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/*
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Convert RGF image to pixel packets.
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*/
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p=data;
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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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byte=(size_t) (*p++);
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SetPixelIndex(image,(Quantum) ((byte & 0x01) != 0 ? 0x01 : 0x00),q);
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bit++;
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byte>>=1;
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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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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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data=(unsigned char *) RelinquishMagickMemory(data);
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(void) SyncImage(image,exception);
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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 R G F 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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% RegisterRGFImage() adds attributes for the RGF 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 RegisterRGFImage method is:
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%
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% size_t RegisterRGFImage(void)
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%
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*/
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ModuleExport size_t RegisterRGFImage(void)
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{
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MagickInfo
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*entry;
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entry=AcquireMagickInfo("RGF","RGF",
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"LEGO Mindstorms EV3 Robot Graphic Format (black and white)");
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entry->decoder=(DecodeImageHandler *) ReadRGFImage;
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entry->encoder=(EncodeImageHandler *) WriteRGFImage;
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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 R G F 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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% UnregisterRGFImage() removes format registrations made by the
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% RGF module from the list of supported formats.
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%
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% The format of the UnregisterRGFImage method is:
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%
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% UnregisterRGFImage(void)
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%
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*/
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ModuleExport void UnregisterRGFImage(void)
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{
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(void) UnregisterMagickInfo("RGF");
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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 R G F 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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% WriteRGFImage() writes an image to a file in the X bitmap format.
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%
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% The format of the WriteRGFImage method is:
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%
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% MagickBooleanType WriteRGFImage(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 WriteRGFImage(const ImageInfo *image_info,Image *image,
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ExceptionInfo *exception)
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{
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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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size_t
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bit,
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byte;
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ssize_t
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y;
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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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if((image->columns > 255L) || (image->rows > 255L))
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ThrowWriterException(ImageError,"Dimensions must be less than 255x255");
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/*
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Write header (just the image dimensions)
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*/
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(void) WriteBlobByte(image,image->columns & 0xff);
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(void) WriteBlobByte(image,image->rows & 0xff);
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/*
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Convert MIFF to bit pixels.
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*/
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(void) SetImageType(image,BilevelType,exception);
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x=0;
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y=0;
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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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byte>>=1;
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if (GetPixelLuma(image,p) < (QuantumRange/2.0))
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byte|=0x80;
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bit++;
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if (bit == 8)
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{
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/*
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Write a bitmap byte to the image file.
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*/
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(void) WriteBlobByte(image,(unsigned char) 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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{
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byte >>= 8 - bit;
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(void) WriteBlobByte(image,(unsigned char) byte);
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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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(void) CloseBlob(image);
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return(MagickTrue);
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}
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