diff --git a/coders/rgf.c b/coders/rgf.c
new file mode 100644
index 0000000..d5507b1
--- /dev/null
+++ b/coders/rgf.c
@@ -0,0 +1,432 @@
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% RRRR GGG FFFFF %
+% R R G F %
+% RRRR G GG FFF %
+% R R G G F %
+% R R GGG F %
+% %
+% %
+% Read/Write LEGO Mindstorms EV3 Robot Graphics File %
+% %
+% Software Design %
+% Brian Wheeler %
+% August 2013 %
+% %
+% %
+% Copyright 1999-2013 ImageMagick Studio LLC, a non-profit organization %
+% dedicated to making software imaging solutions freely available. %
+% %
+% You may not use this file except in compliance with the License. You may %
+% obtain a copy of the License at %
+% %
+% http://www.imagemagick.org/script/license.php %
+% %
+% Unless required by applicable law or agreed to in writing, software %
+% distributed under the License is distributed on an "AS IS" BASIS, %
+% WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. %
+% See the License for the specific language governing permissions and %
+% limitations under the License. %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+%
+*/
+
+/*
+ Include declarations.
+*/
+#include "MagickCore/studio.h"
+#include "MagickCore/attribute.h"
+#include "MagickCore/blob.h"
+#include "MagickCore/blob-private.h"
+#include "MagickCore/cache.h"
+#include "MagickCore/color-private.h"
+#include "MagickCore/colormap.h"
+#include "MagickCore/colorspace.h"
+#include "MagickCore/colorspace-private.h"
+#include "MagickCore/exception.h"
+#include "MagickCore/exception-private.h"
+#include "MagickCore/image.h"
+#include "MagickCore/image-private.h"
+#include "MagickCore/list.h"
+#include "MagickCore/magick.h"
+#include "MagickCore/memory_.h"
+#include "MagickCore/monitor.h"
+#include "MagickCore/monitor-private.h"
+#include "MagickCore/pixel-accessor.h"
+#include "MagickCore/quantum-private.h"
+#include "MagickCore/static.h"
+#include "MagickCore/string_.h"
+#include "MagickCore/module.h"
+#include "MagickCore/utility.h"
+
+/*
+ Forward declarations.
+*/
+static MagickBooleanType
+ WriteRGFImage(const ImageInfo *,Image *,ExceptionInfo *);
+
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% R e a d X B M I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% ReadRGFImage() reads an RGF bitmap 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 ReadRGFImage method is:
+%
+% Image *ReadRGFImage(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 int RGFInteger(Image *image,short int *hex_digits)
+{
+ int
+ c,
+ flag,
+ value;
+
+ value=0;
+ flag=0;
+ for ( ; ; )
+ {
+ c=ReadBlobByte(image);
+ if (c == EOF)
+ {
+ value=(-1);
+ break;
+ }
+ c&=0xff;
+ if (isxdigit(c) != MagickFalse)
+ {
+ value=(int) ((size_t) value << 4)+hex_digits[c];
+ flag++;
+ continue;
+ }
+ if ((hex_digits[c]) < 0 && (flag != 0))
+ break;
+ }
+ return(value);
+}
+
+static Image *ReadRGFImage(const ImageInfo *image_info,ExceptionInfo *exception)
+{
+ Image
+ *image;
+
+ MagickBooleanType
+ status;
+
+ register ssize_t
+ i,
+ x;
+
+ register Quantum
+ *q;
+
+ register unsigned char
+ *p;
+
+ size_t
+ bit,
+ byte,
+ bytes_per_line,
+ length,
+ padding,
+ value,
+ version;
+
+ ssize_t
+ y;
+
+ unsigned char
+ *data;
+
+
+ /*
+ 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);
+ }
+ /*
+ Read RGF header.
+ */
+ image->columns = (unsigned long) ReadBlobByte(image);
+ image->rows = (unsigned long) ReadBlobByte(image);
+ image->depth=8;
+ image->storage_class=PseudoClass;
+ image->colors=2;
+ /*
+ Initialize image structure.
+ */
+ if (AcquireImageColormap(image,image->colors,exception) == MagickFalse)
+ ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
+ /*
+ Initialize 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));
+ }
+
+
+ /*
+ Read hex image data.
+ */
+ length=(size_t) image->rows;
+ data=(unsigned char *) AcquireQuantumMemory(image->rows,image->columns*
+ sizeof(*data));
+ if (data == (unsigned char *) NULL)
+ ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
+ p=data;
+ for (i=0; i < (ssize_t) (image->columns * image->rows); i++)
+ {
+ *p++=ReadBlobByte(image);
+ }
+
+ /*
+ Convert RGF image to pixel packets.
+ */
+ p=data;
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
+ if (q == (Quantum *) NULL)
+ break;
+ bit=0;
+ byte=0;
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ if (bit == 0)
+ byte=(size_t) (*p++);
+ SetPixelIndex(image,(Quantum) ((byte & 0x01) != 0 ? 0x01 : 0x00),q);
+ bit++;
+ byte>>=1;
+ if (bit == 8)
+ bit=0;
+ q+=GetPixelChannels(image);
+ }
+ if (SyncAuthenticPixels(image,exception) == MagickFalse)
+ break;
+ status=SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,
+ image->rows);
+ if (status == MagickFalse)
+ break;
+ }
+ data=(unsigned char *) RelinquishMagickMemory(data);
+ (void) SyncImage(image,exception);
+ (void) CloseBlob(image);
+ return(GetFirstImageInList(image));
+}
+
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% R e g i s t e r R G F I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% RegisterRGFImage() adds attributes for the RGF image format to
+% the list of supported formats. The attributes include the image format
+% tag, a method to read and/or write the format, whether the format
+% supports the saving of more than one frame to the same file or blob,
+% whether the format supports native in-memory I/O, and a brief
+% description of the format.
+%
+% The format of the RegisterRGFImage method is:
+%
+% size_t RegisterRGFImage(void)
+%
+*/
+ModuleExport size_t RegisterRGFImage(void)
+{
+ MagickInfo
+ *entry;
+
+ entry=SetMagickInfo("RGF");
+ entry->decoder=(DecodeImageHandler *) ReadRGFImage;
+ entry->encoder=(EncodeImageHandler *) WriteRGFImage;
+ entry->adjoin=MagickFalse;
+ entry->description=ConstantString(
+ "LEGO Mindstorms EV3 Robot Graphic Format (black and white)");
+ entry->module=ConstantString("RGF");
+ (void) RegisterMagickInfo(entry);
+ return(MagickImageCoderSignature);
+}
+
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% U n r e g i s t e r R G F I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% UnregisterRGFImage() removes format registrations made by the
+% RGF module from the list of supported formats.
+%
+% The format of the UnregisterRGFImage method is:
+%
+% UnregisterRGFImage(void)
+%
+*/
+ModuleExport void UnregisterRGFImage(void)
+{
+ (void) UnregisterMagickInfo("RGF");
+}
+
+/*
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+% %
+% %
+% %
+% W r i t e R G F I m a g e %
+% %
+% %
+% %
+%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
+%
+% WriteRGFImage() writes an image to a file in the X bitmap format.
+%
+% The format of the WriteRGFImage method is:
+%
+% MagickBooleanType WriteRGFImage(const ImageInfo *image_info,
+% Image *image,ExceptionInfo *exception)
+%
+% A description of each parameter follows.
+%
+% o image_info: the image info.
+%
+% o image: The image.
+%
+% o exception: return any errors or warnings in this structure.
+%
+*/
+static MagickBooleanType WriteRGFImage(const ImageInfo *image_info,Image *image,
+ ExceptionInfo *exception)
+{
+ MagickBooleanType
+ status;
+
+ register const Quantum
+ *p;
+
+ register ssize_t
+ x;
+
+ size_t
+ bit,
+ byte;
+
+ ssize_t
+ count,
+ y;
+
+ /*
+ Open output image file.
+ */
+ assert(image_info != (const ImageInfo *) NULL);
+ assert(image_info->signature == MagickSignature);
+ assert(image != (Image *) NULL);
+ assert(image->signature == MagickSignature);
+ if (image->debug != MagickFalse)
+ (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
+ assert(exception != (ExceptionInfo *) NULL);
+ assert(exception->signature == MagickSignature);
+ status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
+ if (status == MagickFalse)
+ return(status);
+ if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)
+ (void) TransformImageColorspace(image,sRGBColorspace,exception);
+ if((image->columns > 255L) || (image->rows > 255L))
+ ThrowWriterException(ImageError,"Dimensions must be less than 255x255");
+
+ /*
+ Write header (just the image dimensions)
+ */
+ (void)WriteBlobByte(image,image->rows & 0xff);
+ (void)WriteBlobByte(image,image->columns & 0xff);
+
+ /*
+ Convert MIFF to bit pixels.
+ */
+ (void) SetImageType(image,BilevelType,exception);
+ bit=0;
+ byte=0;
+ count=0;
+ x=0;
+ y=0;
+ for (y=0; y < (ssize_t) image->rows; y++)
+ {
+ p=GetVirtualPixels(image,0,y,image->columns,1,exception);
+ if (p == (const Quantum *) NULL)
+ break;
+ for (x=0; x < (ssize_t) image->columns; x++)
+ {
+ byte>>=1;
+ if (GetPixelLuma(image,p) < (QuantumRange/2))
+ byte|=0x80;
+ bit++;
+ if (bit == 8)
+ {
+ /*
+ Write a bitmap byte to the image file.
+ */
+ (void) WriteBlobByte(image,byte);
+ bit=0;
+ byte=0;
+ }
+ p+=GetPixelChannels(image);
+ }
+ status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
+ image->rows);
+ if (status == MagickFalse)
+ break;
+ }
+ (void) CloseBlob(image);
+ return(MagickTrue);
+}
