/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% JJJJJ BBBB IIIII GGGG %
% J B B I G %
% J BBBB I G GG %
% J J B B I G G %
% JJJ BBBB IIIII GGG %
% %
% %
% Read/Write JBIG Image Format. %
% %
% Software Design %
% John Cristy %
% July 1992 %
% %
% %
% Copyright 1999-2007 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 "magick/studio.h"
#include "magick/blob.h"
#include "magick/blob-private.h"
#include "magick/color-private.h"
#include "magick/colorspace.h"
#include "magick/constitute.h"
#include "magick/exception.h"
#include "magick/exception-private.h"
#include "magick/geometry.h"
#include "magick/image.h"
#include "magick/image-private.h"
#include "magick/list.h"
#include "magick/magick.h"
#include "magick/memory_.h"
#include "magick/monitor.h"
#include "magick/nt-feature.h"
#include "magick/quantum-private.h"
#include "magick/static.h"
#include "magick/string_.h"
#include "magick/module.h"
#if defined(HasJBIG)
#include "jbig.h"
#endif
/*
Forward declarations.
*/
#if defined(HasJBIG)
static MagickBooleanType
WriteJBIGImage(const ImageInfo *,Image *);
#endif
#if defined(HasJBIG)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d J B I G I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadJBIGImage() reads a JBIG 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 ReadJBIGImage method is:
%
% Image *ReadJBIGImage(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 *ReadJBIGImage(const ImageInfo *image_info,
ExceptionInfo *exception)
{
Image
*image;
IndexPacket
index;
long
length,
y;
MagickBooleanType
status;
register IndexPacket
*indexes;
register long
x;
register PixelPacket
*q;
register unsigned char
*p;
ssize_t
count;
struct jbg_dec_state
jbig_info;
unsigned char
bit,
*buffer,
byte;
/*
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=AllocateImage(image_info);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
/*
Initialize JBIG toolkit.
*/
jbg_dec_init(&jbig_info);
jbg_dec_maxsize(&jbig_info,(unsigned long) image->columns,(unsigned long)
image->rows);
image->columns=jbg_dec_getwidth(&jbig_info);
image->rows=jbg_dec_getheight(&jbig_info);
image->depth=8;
image->storage_class=PseudoClass;
image->colors=2;
/*
Read JBIG file.
*/
buffer=(unsigned char *) AcquireQuantumMemory(MagickMaxBufferSize,
sizeof(*buffer));
if (buffer == (unsigned char *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
status=JBG_EAGAIN;
do
{
length=(long) ReadBlob(image,MagickMaxBufferSize,buffer);
if (length == 0)
break;
p=buffer;
count=0;
while ((length > 0) && ((status == JBG_EAGAIN) || (status == JBG_EOK)))
{
size_t
count;
status=jbg_dec_in(&jbig_info,p,length,&count);
p+=count;
length-=(long) count;
}
} while ((status == JBG_EAGAIN) || (status == JBG_EOK));
/*
Create colormap.
*/
image->columns=jbg_dec_getwidth(&jbig_info);
image->rows=jbg_dec_getheight(&jbig_info);
if (AllocateImageColormap(image,2) == MagickFalse)
{
buffer=(unsigned char *) RelinquishMagickMemory(buffer);
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
}
image->colormap[0].red=0;
image->colormap[0].green=0;
image->colormap[0].blue=0;
image->colormap[1].red=QuantumRange;
image->colormap[1].green=QuantumRange;
image->colormap[1].blue=QuantumRange;
image->x_resolution=300;
image->y_resolution=300;
if (image_info->ping != MagickFalse)
{
CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
Convert X bitmap image to pixel packets.
*/
if (SetImageExtent(image,0,0) == MagickFalse)
{
InheritException(exception,&image->exception);
return(DestroyImageList(image));
}
p=jbg_dec_getimage(&jbig_info,0);
for (y=0; y < (long) image->rows; y++)
{
q=SetImagePixels(image,0,y,image->columns,1);
if (q == (PixelPacket *) NULL)
break;
indexes=GetIndexes(image);
bit=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
if (bit == 0)
byte=(*p++);
index=(byte & 0x80) ? 0 : 1;
bit++;
byte<<=1;
if (bit == 8)
bit=0;
indexes[x]=index;
*q++=image->colormap[(long) index];
}
if (SyncImagePixels(image) == MagickFalse)
break;
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(LoadImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
/*
Free scale resource.
*/
jbg_dec_free(&jbig_info);
buffer=(unsigned char *) RelinquishMagickMemory(buffer);
CloseBlob(image);
return(GetFirstImageInList(image));
}
#endif
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r J B I G I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterJBIGImage() adds attributes for the JBIG 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 RegisterJBIGImage method is:
%
% unsigned long RegisterJBIGImage(void)
%
*/
ModuleExport unsigned long RegisterJBIGImage(void)
{
#define JBIGDescription "Joint Bi-level Image experts Group interchange format"
char
version[MaxTextExtent];
MagickInfo
*entry;
*version='\0';
#if defined(JBG_VERSION)
(void) CopyMagickString(version,JBG_VERSION,MaxTextExtent);
#endif
entry=SetMagickInfo("BIE");
#if defined(HasJBIG)
entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
#endif
entry->adjoin=MagickFalse;
entry->description=ConstantString(JBIGDescription);
if (*version != '\0')
entry->version=ConstantString(version);
entry->module=ConstantString("JBIG");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("JBG");
#if defined(HasJBIG)
entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
#endif
entry->description=ConstantString(JBIGDescription);
if (*version != '\0')
entry->version=ConstantString(version);
entry->module=ConstantString("JBIG");
(void) RegisterMagickInfo(entry);
entry=SetMagickInfo("JBIG");
#if defined(HasJBIG)
entry->decoder=(DecodeImageHandler *) ReadJBIGImage;
entry->encoder=(EncodeImageHandler *) WriteJBIGImage;
#endif
entry->description=ConstantString(JBIGDescription);
if (*version != '\0')
entry->version=ConstantString(version);
entry->module=ConstantString("JBIG");
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r J B I G I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterJBIGImage() removes format registrations made by the
% JBIG module from the list of supported formats.
%
% The format of the UnregisterJBIGImage method is:
%
% UnregisterJBIGImage(void)
%
*/
ModuleExport void UnregisterJBIGImage(void)
{
(void) UnregisterMagickInfo("BIE");
(void) UnregisterMagickInfo("JBG");
(void) UnregisterMagickInfo("JBIG");
}
#if defined(HasJBIG)
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e J B I G I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WriteJBIGImage() writes an image in the JBIG encoded image format.
%
% The format of the WriteJBIGImage method is:
%
% MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,Image *image)
%
% A description of each parameter follows.
%
% o image_info: The image info.
%
% o image: The image.
%
%
*/
static void JBIGEncode(unsigned char *pixels,size_t length,void *data)
{
Image
*image;
image=(Image *) data;
(void) WriteBlob(image,length,pixels);
}
static MagickBooleanType WriteJBIGImage(const ImageInfo *image_info,
Image *image)
{
double
version;
long
y;
MagickBooleanType
status;
MagickOffsetType
scene;
register const PixelPacket
*p;
register IndexPacket
*indexes;
register long
x;
register unsigned char
*q;
struct jbg_enc_state
jbig_info;
unsigned char
bit,
byte,
*pixels;
unsigned long
number_packets;
/*
Open 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);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,&image->exception);
if (status == MagickFalse)
return(status);
version=strtod(JBG_VERSION,(char **) NULL);
scene=0;
do
{
/*
Allocate pixel data.
*/
if (image_info->colorspace == UndefinedColorspace)
(void) SetImageColorspace(image,RGBColorspace);
number_packets=(image->columns+7)/8;
pixels=(unsigned char *) AcquireQuantumMemory(number_packets,
image->rows*sizeof(*pixels));
if (pixels == (unsigned char *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
/*
Convert pixels to a bitmap.
*/
(void) SetImageType(image,BilevelType);
q=pixels;
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=GetIndexes(image);
bit=0;
byte=0;
for (x=0; x < (long) image->columns; x++)
{
byte<<=1;
if (PixelIntensity(p) < (QuantumRange/2.0))
byte|=0x01;
bit++;
if (bit == 8)
{
*q++=byte;
bit=0;
byte=0;
}
p++;
}
if (bit != 0)
*q++=byte << (8-bit);
if ((image->progress_monitor != (MagickProgressMonitor) NULL) &&
(QuantumTick(y,image->rows) != MagickFalse))
{
status=image->progress_monitor(SaveImageTag,y,image->rows,
image->client_data);
if (status == MagickFalse)
break;
}
}
/*
Initialize JBIG info structure.
*/
jbg_enc_init(&jbig_info,image->columns,image->rows,1,&pixels,
(void (*)(unsigned char *,size_t,void *)) JBIGEncode,image);
if (image_info->scene != 0)
jbg_enc_layers(&jbig_info,(int) image_info->scene);
else
{
long
sans_offset;
unsigned long
x_resolution,
y_resolution;
x_resolution=640;
y_resolution=480;
sans_offset=0;
if (image_info->density != (char *) NULL)
{
GeometryInfo
geometry_info;
MagickStatusType
flags;
flags=ParseGeometry(image_info->density,&geometry_info);
x_resolution=geometry_info.rho;
y_resolution=geometry_info.sigma;
if ((flags & SigmaValue) == 0)
y_resolution=x_resolution;
}
if (image->units == PixelsPerCentimeterResolution)
{
x_resolution*=2.54;
y_resolution*=2.54;
}
(void) jbg_enc_lrlmax(&jbig_info,x_resolution,y_resolution);
}
(void) jbg_enc_lrange(&jbig_info,-1,-1);
jbg_enc_options(&jbig_info,JBG_ILEAVE | JBG_SMID,JBG_TPDON | JBG_TPBON |
JBG_DPON,version < 1.6 ? -1 : 0,-1,-1);
/*
Write JBIG image.
*/
jbg_enc_out(&jbig_info);
jbg_enc_free(&jbig_info);
pixels=(unsigned char *) RelinquishMagickMemory(pixels);
if (GetNextImageInList(image) == (Image *) NULL)
break;
image=SyncNextImageInList(image);
if (image->progress_monitor != (MagickProgressMonitor) NULL)
{
status=image->progress_monitor(SaveImagesTag,scene,
GetImageListLength(image),image->client_data);
if (status == MagickFalse)
break;
}
scene++;
} while (image_info->adjoin != MagickFalse);
CloseBlob(image);
return(MagickTrue);
}
#endif
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