/*

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%                                                                             %

%                            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 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/license/                                         %

%                                                                             %

%  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/string-private.h"

#include "MagickCore/module.h"

/*

  Forward declarations.

*/

static MagickBooleanType

  WritePGXImage(const ImageInfo *,Image *,ExceptionInfo *);

/*

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%                                                                             %

%   I s P G X                                                                 %

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%

%  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];

  Image

    *image;

  int

    height,

    precision,

    width;

  QuantumInfo

    *quantum_info;

  MagickBooleanType

    status;

  size_t

    length;

  ssize_t

    count,

    y;

  unsigned char

    *pixels;

  /*

    Open image file.

  */

  assert(image_info != (const ImageInfo *) NULL);

  assert(image_info->signature == MagickCoreSignature);

  assert(exception != (ExceptionInfo *) NULL);

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",

      image_info->filename);

  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) MagickSscanf(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);

  pixels=GetQuantumPixels(quantum_info);

  for (y=0; y < (ssize_t) image->rows; y++)

  {

    const void

      *stream;

    Quantum

      *magick_restrict q;

    q=QueueAuthenticPixels(image,0,y,image->columns,1,exception);

    if (q == (Quantum *) NULL)

      break;

    stream=ReadBlobStream(image,length,pixels,&count);

    if (count != (ssize_t) length)

      break;

    (void) ImportQuantumPixels(image,(CacheView *) NULL,quantum_info,

      GrayQuantum,(unsigned char *) stream,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);

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  if (status == MagickFalse)

    return(DestroyImageList(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;

  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);

  assert(exception != (ExceptionInfo *) NULL);

  assert(exception->signature == MagickCoreSignature);

  if (IsEventLogging() != MagickFalse)

    (void) LogMagickEvent(TraceEvent,GetMagickModule(),"%s",image->filename);

  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);

  if (IssRGBCompatibleColorspace(image->colorspace) == MagickFalse)

    (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");

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  return(status);

}