/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% PPPP GGGG X X %
% P P G X X %
% PPPP G GG X %
% P G G X X %
% P GGG X X %
% %
% %
% PGX JPEG 2000 Format %
% %
% Software Design %
% Cristy %
% July 2016 %
% %
% %
% Copyright 1999-2019 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 %
% %
% https://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/quantum-private.h"
#include "MagickCore/static.h"
#include "MagickCore/string_.h"
#include "MagickCore/module.h"
/*
Forward declarations.
*/
static MagickBooleanType
WritePGXImage(const ImageInfo *,Image *,ExceptionInfo *);
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% I s P G X %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% IsPGXreturns True if the image format type, identified by the magick
% string, is PGX.
%
% The format of the IsPGX method is:
%
% unsigned int IsPGX(const unsigned char *magick,const size_t length)
%
% A description of each parameter follows:
%
% o magick: compare image format pattern against these bytes.
%
% o length: Specifies the length of the magick string.
%
*/
static unsigned int IsPGX(const unsigned char *magick,const size_t length)
{
if (length < 5)
return(MagickFalse);
if ((memcmp(magick,"PG ML",5) == 0) || (memcmp(magick,"PG LM",5) == 0))
return(MagickTrue);
return(MagickFalse);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e a d P G X I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% ReadPGXImage() reads an image of raw bits in LSB order 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 ReadPGXImage method is:
%
% Image *ReadPGXImage(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 *ReadPGXImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
char
buffer[MagickPathExtent],
endian[MagickPathExtent],
sans[MagickPathExtent],
sign[MagickPathExtent];
const unsigned char
*pixels;
Image
*image;
int
height,
precision,
width;
QuantumInfo
*quantum_info;
MagickBooleanType
status;
size_t
length;
ssize_t
count,
y;
/*
Open image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickCoreSignature);
if (image_info->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",
image_info->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
image=AcquireImage(image_info,exception);
status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
if (status == MagickFalse)
{
image=DestroyImageList(image);
return((Image *) NULL);
}
if (ReadBlobString(image,buffer) == (char *) NULL)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
count=(ssize_t) sscanf(buffer,"PG%[ \t]%2s%[ \t+-]%d%[ \t]%d%[ \t]%d",sans,
endian,sign,&precision,sans,&width,sans,&height);
if (count != 8)
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
image->depth=(size_t) precision;
if (LocaleCompare(endian,"ML") == 0)
image->endian=MSBEndian;
image->columns=(size_t) width;
image->rows=(size_t) height;
if ((image->columns == 0) || (image->rows == 0))
ThrowReaderException(CorruptImageError,"ImproperImageHeader");
if (image_info->ping != MagickFalse)
{
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
status=SetImageExtent(image,image->columns,image->rows,exception);
if (status == MagickFalse)
return(DestroyImageList(image));
/*
Convert PGX image.
*/
(void) SetImageColorspace(image,GRAYColorspace,exception);
quantum_info=AcquireQuantumInfo(image_info,image);
if (quantum_info == (QuantumInfo *) NULL)
ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");
length=GetQuantumExtent(image,quantum_info,GrayQuantum);
for (y=0; y < (ssize_t) image->rows; y++)
{
register Quantum
*magick_restrict q;
q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);
if (q == (Quantum *) NULL)
break;
pixels=(const unsigned char *) ReadBlobStream(image,length,
GetQuantumPixels(quantum_info),&count);
if (count != (ssize_t) length)
break;
(void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,
GrayQuantum,pixels,exception);
if (SyncAuthenticPixels(image,exception) == MagickFalse)
break;
if (SetImageProgress(image,LoadImageTag,(MagickOffsetType) y,image->rows) == MagickFalse)
break;
}
SetQuantumImageType(image,GrayQuantum);
quantum_info=DestroyQuantumInfo(quantum_info);
if (EOFBlob(image) != MagickFalse)
ThrowFileException(exception,CorruptImageError,"UnexpectedEndOfFile",
image->filename);
(void) CloseBlob(image);
return(GetFirstImageInList(image));
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% R e g i s t e r P G X I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% RegisterPGXImage() adds attributes for the PGX 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 RegisterPGXImage method is:
%
% size_t RegisterPGXImage(void)
%
*/
ModuleExport size_t RegisterPGXImage(void)
{
MagickInfo
*entry;
entry=AcquireMagickInfo("PGX","PGX","JPEG 2000 uncompressed format");
entry->decoder=(DecodeImageHandler *) ReadPGXImage;
entry->encoder=(EncodeImageHandler *) WritePGXImage;
entry->magick=(IsImageFormatHandler *) IsPGX;
entry->flags^=CoderAdjoinFlag;
entry->flags^=CoderUseExtensionFlag;
(void) RegisterMagickInfo(entry);
return(MagickImageCoderSignature);
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% U n r e g i s t e r P G X I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% UnregisterPGXImage() removes format registrations made by the
% PGX module from the list of supported formats.
%
% The format of the UnregisterPGXImage method is:
%
% UnregisterPGXImage(void)
%
*/
ModuleExport void UnregisterPGXImage(void)
{
(void) UnregisterMagickInfo("PGX");
}
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
% %
% %
% %
% W r i t e P G X I m a g e %
% %
% %
% %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
% WritePGXImage() writes an image of raw bits in LSB order to a file.
%
% The format of the WritePGXImage method is:
%
% MagickBooleanType WritePGXImage(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 WritePGXImage(const ImageInfo *image_info,Image *image,
ExceptionInfo *exception)
{
char
buffer[MagickPathExtent];
MagickBooleanType
status;
QuantumInfo
*quantum_info;
register const Quantum
*p;
size_t
length;
ssize_t
count,
y;
unsigned char
*pixels;
/*
Open output image file.
*/
assert(image_info != (const ImageInfo *) NULL);
assert(image_info->signature == MagickCoreSignature);
assert(image != (Image *) NULL);
assert(image->signature == MagickCoreSignature);
if (image->debug != MagickFalse)
(void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);
assert(exception != (ExceptionInfo *) NULL);
assert(exception->signature == MagickCoreSignature);
status=OpenBlob(image_info,image,WriteBinaryBlobMode,exception);
if (status == MagickFalse)
return(status);
(void) FormatLocaleString(buffer,MagickPathExtent,"PG ML + %g %g %g\n",
(double) image->depth,(double) image->columns,(double) image->rows);
(void) WriteBlob(image,strlen(buffer),(unsigned char *) buffer);
(void) TransformImageColorspace(image,sRGBColorspace,exception);
quantum_info=AcquireQuantumInfo(image_info,image);
if (quantum_info == (QuantumInfo *) NULL)
ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed");
pixels=(unsigned char *) GetQuantumPixels(quantum_info);
for (y=0; y < (ssize_t) image->rows; y++)
{
p=GetVirtualPixels(image,0,y,image->columns,1,exception);
if (p == (const Quantum *) NULL)
break;
length=ExportQuantumPixels(image,(CacheView *) NULL,quantum_info,
GrayQuantum,pixels,exception);
count=WriteBlob(image,length,pixels);
if (count != (ssize_t) length)
break;
count=WriteBlob(image,(size_t) (-(ssize_t) length) & 0x01,pixels);
status=SetImageProgress(image,SaveImageTag,(MagickOffsetType) y,
image->rows);
if (status == MagickFalse)
break;
}
quantum_info=DestroyQuantumInfo(quantum_info);
if (y < (ssize_t) image->rows)
ThrowWriterException(CorruptImageError,"UnableToWriteImageData");
(void) CloseBlob(image);
return(status);
}