/* [<][>][^][v][top][bottom][index][help] */
DEFINITIONS
This source file includes following definitions.
- ReadOTBImage
- RegisterOTBImage
- UnregisterOTBImage
- WriteOTBImage
/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
%
% This program is covered by multiple licenses, which are described in
% Copyright.txt. You should have received a copy of Copyright.txt with this
% package; otherwise see http://www.graphicsmagick.org/www/Copyright.html.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% OOO TTTTT BBBB %
% O O T B B %
% O O T BBBB %
% O O T B B %
% OOO T BBBB %
% %
% %
% Read/Write On-The-Air Image Format. %
% %
% %
% Software Design %
% John Cristy %
% January 2000 %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/
/*
Include declarations.
*/
#include "magick/studio.h"
#include "magick/blob.h"
#include "magick/colormap.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/pixel_cache.h"
#include "magick/utility.h"
/*
Forward declarations.
*/
static unsigned int
WriteOTBImage(const ImageInfo *,Image *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d O T B I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method ReadOTBImage reads a on-the-air (level 0) bitmap 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 ReadOTBImage method is:
%
% Image *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
% A description of each parameter follows:
%
% o image: Method ReadOTBImage 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 *ReadOTBImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define GetBit(a,i) (((a) >> (i)) & 1L)
Image
*image;
int
byte;
long
y;
register IndexPacket
*indexes;
register long
x;
register PixelPacket
*q;
unsigned char
bit,
info,
depth;
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.
*/
info=ReadBlobByte(image);
if (GetBit(info,4) == 0)
{
image->columns=ReadBlobByte(image);
image->rows=ReadBlobByte(image);
}
else
{
image->columns=ReadBlobMSBShort(image);
image->rows=ReadBlobMSBShort(image);
}
if ((image->columns == 0) || (image->rows == 0))
ThrowReaderException(CorruptImageError,ImproperImageHeader,image);
depth=ReadBlobByte(image);
if (depth != 1)
ThrowReaderException(CoderError,OnlyLevelZerofilesSupported,image);
if (!AllocateImageColormap(image,2))
ThrowReaderException(ResourceLimitError,MemoryAllocationFailed,image);
if (image_info->ping)
{
CloseBlob(image);
return(image);
}
/*
Convert bi-level image to pixel packets.
*/
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=AccessMutableIndexes(image);
bit=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
if (bit == 0)
{
byte=ReadBlobByte(image);
if (byte == EOF)
ThrowReaderException(CorruptImageError,CorruptImage,image);
}
indexes[x]=(byte & (0x01 << (7-bit))) ? 0x01 : 0x00;
bit++;
if (bit == 8)
bit=0;
}
if (!SyncImagePixels(image))
break;
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,exception,LoadImageText,
image->filename,
image->columns,image->rows))
break;
}
(void) SyncImage(image);
if (EOFBlob(image))
ThrowException(exception,CorruptImageError,UnexpectedEndOfFile,
image->filename);
CloseBlob(image);
return(image);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r O T B I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method RegisterOTBImage adds attributes for the OTB 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 RegisterOTBImage method is:
%
% RegisterOTBImage(void)
%
*/
ModuleExport void RegisterOTBImage(void)
{
MagickInfo
*entry;
entry=SetMagickInfo("OTB");
entry->decoder=(DecoderHandler) ReadOTBImage;
entry->encoder=(EncoderHandler) WriteOTBImage;
entry->adjoin=False;
entry->description="On-the-air bitmap";
entry->module="OTB";
(void) RegisterMagickInfo(entry);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r O T B I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method UnregisterOTBImage removes format registrations made by the
% OTB module from the list of supported formats.
%
% The format of the UnregisterOTBImage method is:
%
% UnregisterOTBImage(void)
%
*/
ModuleExport void UnregisterOTBImage(void)
{
(void) UnregisterMagickInfo("OTB");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e O T B I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% Method WriteOTBImage writes an image to a file in the On-the-air Bitmap
% (level 0) image format.
%
% The format of the WriteOTBImage method is:
%
% unsigned int WriteOTBImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o status: Method WriteOTBImage return True if the image is written.
% False is returned is there is a memory shortage or if the image file
% fails to write.
%
% o image_info: Specifies a pointer to a ImageInfo structure.
%
% o image: A pointer to an Image structure.
%
%
*/
static unsigned int WriteOTBImage(const ImageInfo *image_info,Image *image)
{
#define SetBit(a,i,set) \
a=(unsigned char) ((set) ? (a) | (1L << (i)) : (a) & ~(1L << (i)))
long
y;
register const PixelPacket
*p;
register const IndexPacket
*indexes;
register long
x;
unsigned char
bit,
byte,
info,
polarity;
unsigned int
status;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickSignature);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == False)
ThrowWriterException(FileOpenError,UnableToOpenFile,image);
(void) TransformColorspace(image,RGBColorspace);
/*
Convert image to a bi-level image.
*/
(void) SetImageType(image,BilevelType);
polarity=PixelIntensityToQuantum(&image->colormap[0]) < (MaxRGB/2);
if (image->colors == 2)
polarity=PixelIntensityToQuantum(&image->colormap[0]) <
PixelIntensityToQuantum(&image->colormap[1]);
info=0;
if ((image->columns >= 256) || (image->rows >= 256))
SetBit(info,4,1);
(void) WriteBlobByte(image,info);
if ((image->columns >= 256) || (image->rows >= 256))
{
(void) WriteBlobMSBShort(image,image->columns);
(void) WriteBlobMSBShort(image,image->rows);
}
else
{
(void) WriteBlobByte(image,(long) image->columns);
(void) WriteBlobByte(image,(long) image->rows);
}
(void) WriteBlobByte(image,1); /* depth */
for (y=0; y < (long) image->rows; y++)
{
p=AcquireImagePixels(image,0,y,image->columns,1,&image->exception);
if (p == (const PixelPacket *) NULL)
break;
indexes=AccessImmutableIndexes(image);
bit=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
if (indexes[x] == polarity)
byte|=0x1 << (7-bit);
bit++;
if (bit == 8)
{
(void) WriteBlobByte(image,byte);
bit=0;
byte=0;
}
}
if (bit != 0)
(void) WriteBlobByte(image,byte);
if (QuantumTick(y,image->rows))
if (!MagickMonitorFormatted(y,image->rows,&image->exception,
SaveImageText,image->filename,
image->columns,image->rows))
break;
}
CloseBlob(image);
return(True);
}