/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%                            EEEEE  PPPP   TTTTT                              %

%                            E      P   P    T                                %

%                            EEE    PPPP     T                                %

%                            E      P        T                                %

%                            EEEEE  P        T                                %

%                                                                             %

%                                                                             %

%           Read/Write Encapsulated Postscript Format (with preview).         %

%                                                                             %

%                              Software Design                                %

%                                   Cristy                                    %

%                                 July 1992                                   %

%                                                                             %

%                                                                             %

%  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/blob.h"

#include "MagickCore/blob-private.h"

#include "MagickCore/color.h"

#include "MagickCore/constitute.h"

#include "MagickCore/draw.h"

#include "MagickCore/exception.h"

#include "MagickCore/exception-private.h"

#include "MagickCore/delegate.h"

#include "MagickCore/geometry.h"

#include "MagickCore/histogram.h"

#include "MagickCore/image.h"

#include "MagickCore/image-private.h"

#include "MagickCore/list.h"

#include "MagickCore/magick.h"

#include "MagickCore/memory_.h"

#include "MagickCore/memory-private.h"

#include "MagickCore/monitor.h"

#include "MagickCore/monitor-private.h"

#include "MagickCore/quantize.h"

#include "MagickCore/resource_.h"

#include "MagickCore/resize.h"

#include "MagickCore/quantum-private.h"

#include "MagickCore/static.h"

#include "MagickCore/string_.h"

#include "MagickCore/module.h"

#include "MagickCore/utility.h"

/*

  Typedef declarations.

*/

typedef struct _EPTInfo

{

  size_t

    magick;

  MagickOffsetType

    postscript_offset,

    tiff_offset;

  size_t

    postscript_length,

    tiff_length;

  unsigned char

    *postscript,

    *tiff;

} EPTInfo;

/*

  Forward declarations.

*/

static MagickBooleanType

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

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   I s E P T                                                                 %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  IsEPT() returns MagickTrue if the image format type, identified by the

%  magick string, is EPT.

%

%  The format of the IsEPT method is:

%

%      MagickBooleanType IsEPT(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 MagickBooleanType IsEPT(const unsigned char *magick,const size_t length)

{

  if (length < 4)

    return(MagickFalse);

  if (memcmp(magick,"\305\320\323\306",4) == 0)

    return(MagickTrue);

  return(MagickFalse);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e a d E P T I m a g e                                                   %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  ReadEPTImage() reads a binary Postscript 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 ReadEPTImage method is:

%

%      Image *ReadEPTImage(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 *ReadEPTImage(const ImageInfo *image_info,ExceptionInfo *exception)

{

  const void

    *postscript_data,

    *tiff_data;

  EPTInfo

    ept_info;

  Image

    *image,

    *tiff_image;

  ImageInfo

    *read_info;

  MagickBooleanType

    status;

  MagickOffsetType

    offset;

  ssize_t

    count;

  /*

    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);

    }

  ept_info.magick=ReadBlobLSBLong(image);

  if (ept_info.magick != 0xc6d3d0c5ul)

    ThrowReaderException(CorruptImageError,"ImproperImageHeader");

  ept_info.postscript_offset=(MagickOffsetType) ReadBlobLSBLong(image);

  ept_info.postscript_length=ReadBlobLSBLong(image);

  if (HeapOverflowCheckAdd(ept_info.postscript_length,1) != MagickFalse)

    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

  if ((MagickSizeType) ept_info.postscript_length > GetBlobSize(image))

    ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");

  (void) ReadBlobLSBLong(image);

  (void) ReadBlobLSBLong(image);

  ept_info.tiff_offset=(MagickOffsetType) ReadBlobLSBLong(image);

  ept_info.tiff_length=ReadBlobLSBLong(image);

  if (HeapOverflowCheckAdd(ept_info.tiff_length,1) != MagickFalse)

    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

  if ((ept_info.postscript_length+ept_info.tiff_length) == 0)

    ThrowReaderException(CorruptImageError,"ImproperImageHeader");

  if ((MagickSizeType) ept_info.tiff_length > GetBlobSize(image))

    ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");

  (void) ReadBlobLSBShort(image);

  ept_info.postscript=(unsigned char *) AcquireQuantumMemory(

    ept_info.postscript_length+1,sizeof(*ept_info.postscript));

  if (ept_info.postscript == (unsigned char *) NULL)

    ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

  (void) memset(ept_info.postscript,0,(ept_info.postscript_length+1)*

    sizeof(*ept_info.postscript));

  ept_info.tiff=(unsigned char *) AcquireQuantumMemory(ept_info.tiff_length+1,

    sizeof(*ept_info.tiff));

  if (ept_info.tiff == (unsigned char *) NULL)

    {

      ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

        ept_info.postscript);

      ThrowReaderException(ResourceLimitError,"MemoryAllocationFailed");

    }

  (void) memset(ept_info.tiff,0,(ept_info.tiff_length+1)*

    sizeof(*ept_info.tiff));

  offset=SeekBlob(image,ept_info.tiff_offset,SEEK_SET);

  if ((ept_info.tiff_length != 0) && (offset < 30))

    {

      ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);

      ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

        ept_info.postscript);

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    }

  tiff_data=ReadBlobStream(image,ept_info.tiff_length,ept_info.tiff,&count);

  if (count != (ssize_t) (ept_info.tiff_length))

    (void) ThrowMagickException(exception,GetMagickModule(),CorruptImageWarning,

      "InsufficientImageDataInFile","`%s'",image->filename);

  offset=SeekBlob(image,ept_info.postscript_offset,SEEK_SET);

  if ((ept_info.postscript_length != 0) && (offset < 30))

    {

      ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);

      ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

        ept_info.postscript);

      ThrowReaderException(CorruptImageError,"ImproperImageHeader");

    }

  postscript_data=ReadBlobStream(image,ept_info.postscript_length,

    ept_info.postscript,&count);

  if (count != (ssize_t) (ept_info.postscript_length))

    {

      ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);

      ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

        ept_info.postscript);

      ThrowReaderException(CorruptImageError,"InsufficientImageDataInFile");

    }

  (void) CloseBlob(image);

  image=DestroyImage(image);

  read_info=CloneImageInfo(image_info);

  read_info->number_scenes=1;

  read_info->scene=0;

  (void) CopyMagickString(read_info->magick,"EPS",MagickPathExtent);

  if (ept_info.postscript_length != 0)

    {

      /*

        Convert Postscript blob to image.

      */

      image=BlobToImage(read_info,postscript_data,ept_info.postscript_length,

        exception);

      if (image != (Image *) NULL)

        {

          (void) CopyMagickString(image->filename,image_info->filename,

            MagickPathExtent);

          (void) CopyMagickString(image->magick,"EPT",MagickPathExtent);

        }

    }

  if (ept_info.tiff_length != 0)

    {

      /*

        Convert TIFF blob to image.

      */

      (void) CopyMagickString(read_info->magick,"TIFF",MagickPathExtent);

      tiff_image=BlobToImage(read_info,tiff_data,ept_info.tiff_length,

        exception);

      if (tiff_image != (Image *) NULL)

        {

          if (image == (Image *) NULL)

            image=tiff_image;

          else

            AppendImageToList(&image,tiff_image);

        }

    }

  read_info=DestroyImageInfo(read_info);

  ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);

  ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

    ept_info.postscript);

  return(GetFirstImageInList(image));

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   R e g i s t e r E P T I m a g e                                           %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  RegisterEPTImage() adds attributes for the EPT 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 RegisterEPTImage method is:

%

%      size_t RegisterEPTImage(void)

%

*/

ModuleExport size_t RegisterEPTImage(void)

{

  MagickInfo

    *entry;

  entry=AcquireMagickInfo("EPT","EPT",

    "Encapsulated PostScript with TIFF preview");

  entry->decoder=(DecodeImageHandler *) ReadEPTImage;

  entry->encoder=(EncodeImageHandler *) WriteEPTImage;

  entry->magick=(IsImageFormatHandler *) IsEPT;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  entry->flags^=CoderAdjoinFlag;

  entry->flags^=CoderBlobSupportFlag;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("EPT","EPT2",

    "Encapsulated PostScript Level II with TIFF preview");

  entry->decoder=(DecodeImageHandler *) ReadEPTImage;

  entry->encoder=(EncodeImageHandler *) WriteEPTImage;

  entry->magick=(IsImageFormatHandler *) IsEPT;

  entry->flags^=CoderAdjoinFlag;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  entry->flags^=CoderBlobSupportFlag;

  (void) RegisterMagickInfo(entry);

  entry=AcquireMagickInfo("EPT","EPT3",

    "Encapsulated PostScript Level III with TIFF preview");

  entry->decoder=(DecodeImageHandler *) ReadEPTImage;

  entry->encoder=(EncodeImageHandler *) WriteEPTImage;

  entry->magick=(IsImageFormatHandler *) IsEPT;

  entry->flags|=CoderDecoderSeekableStreamFlag;

  entry->flags^=CoderBlobSupportFlag;

  (void) RegisterMagickInfo(entry);

  return(MagickImageCoderSignature);

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   U n r e g i s t e r E P T I m a g e                                       %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  UnregisterEPTImage() removes format registrations made by the

%  EPT module from the list of supported formats.

%

%  The format of the UnregisterEPTImage method is:

%

%      UnregisterEPTImage(void)

%

*/

ModuleExport void UnregisterEPTImage(void)

{

  (void) UnregisterMagickInfo("EPT");

}

/*

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%                                                                             %

%                                                                             %

%                                                                             %

%   W r i t e E P T I m a g e                                                 %

%                                                                             %

%                                                                             %

%                                                                             %

%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

%

%  WriteEPTImage() writes an image in the Encapsulated Postscript format

%  with a TIFF preview.

%

%  The format of the WriteEPTImage method is:

%

%      MagickBooleanType WriteEPTImage(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 WriteEPTImage(const ImageInfo *image_info,Image *image,

  ExceptionInfo *exception)

{

  char

    filename[MagickPathExtent];

  EPTInfo

    ept_info;

  Image

    *write_image;

  ImageInfo

    *write_info;

  MagickBooleanType

    status;

  /*

    Write EPT image.

  */

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

  assert(image_info->signature == MagickCoreSignature);

  assert(image != (Image *) NULL);

  assert(image->signature == MagickCoreSignature);

  if (IsEventLogging() != 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);

  write_image=CloneImage(image,0,0,MagickTrue,exception);

  if (write_image == (Image *) NULL)

    return(MagickFalse);

  write_info=CloneImageInfo(image_info);

  (void) CopyMagickString(write_info->filename,"EPS:",MagickPathExtent);

  (void) CopyMagickString(write_info->magick,"EPS",MagickPathExtent);

  if (LocaleCompare(image_info->magick,"EPT2") == 0)

    {

      (void) CopyMagickString(write_info->filename,"EPS2:",MagickPathExtent);

      (void) CopyMagickString(write_info->magick,"EPS2",MagickPathExtent);

    }

  if (LocaleCompare(image_info->magick,"EPT3") == 0)

    {

      (void) CopyMagickString(write_info->filename,"EPS3:",MagickPathExtent);

      (void) CopyMagickString(write_info->magick,"EPS3",MagickPathExtent);

    }

  (void) memset(&ept_info,0,sizeof(ept_info));

  ept_info.magick=0xc6d3d0c5ul;

  ept_info.postscript=(unsigned char *) ImageToBlob(write_info,write_image,

    &ept_info.postscript_length,exception);

  write_image=DestroyImage(write_image);

  write_info=DestroyImageInfo(write_info);

  if (ept_info.postscript == (void *) NULL)

    return(MagickFalse);

  write_image=CloneImage(image,0,0,MagickTrue,exception);

  if (write_image == (Image *) NULL)

    return(MagickFalse);

  write_info=CloneImageInfo(image_info);

  (void) CopyMagickString(write_info->magick,"TIFF",MagickPathExtent);

  (void) FormatLocaleString(filename,MagickPathExtent,"tiff:%s",

    write_info->filename);

  (void) CopyMagickString(write_info->filename,filename,MagickPathExtent);

  if ((write_image->columns > 512) || (write_image->rows > 512))

    {

      Image

        *resize_image;

      resize_image=ResizeImage(write_image,512,512,write_image->filter,

        exception);

      if (resize_image != (Image *) NULL)

        {

          write_image=DestroyImage(write_image);

          write_image=resize_image;

        }

    }

  if ((write_image->storage_class == DirectClass) ||

      (write_image->colors > 256))

    {

      QuantizeInfo

        quantize_info;

      /*

        EPT preview requires that the image is colormapped.

      */

      GetQuantizeInfo(&quantize_info);

      quantize_info.dither_method=IdentifyPaletteImage(write_image,

        exception) == MagickFalse ? RiemersmaDitherMethod : NoDitherMethod;

      (void) QuantizeImage(&quantize_info,write_image,exception);

    }

  write_info->compression=NoCompression;

  ept_info.tiff=(unsigned char *) ImageToBlob(write_info,write_image,

    &ept_info.tiff_length,exception);

  write_image=DestroyImage(write_image);

  write_info=DestroyImageInfo(write_info);

  if (ept_info.tiff == (void *) NULL)

    {

      ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

        ept_info.postscript);

      return(MagickFalse);

    }

  /*

    Write EPT image.

  */

  (void) WriteBlobLSBLong(image,(unsigned int) ept_info.magick);

  (void) WriteBlobLSBLong(image,30);

  (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length);

  (void) WriteBlobLSBLong(image,0);

  (void) WriteBlobLSBLong(image,0);

  (void) WriteBlobLSBLong(image,(unsigned int) ept_info.postscript_length+30);

  (void) WriteBlobLSBLong(image,(unsigned int) ept_info.tiff_length);

  (void) WriteBlobLSBShort(image,0xffff);

  (void) WriteBlob(image,ept_info.postscript_length,ept_info.postscript);

  (void) WriteBlob(image,ept_info.tiff_length,ept_info.tiff);

  /*

    Relinquish resources.

  */

  ept_info.postscript=(unsigned char *) RelinquishMagickMemory(

    ept_info.postscript);

  ept_info.tiff=(unsigned char *) RelinquishMagickMemory(ept_info.tiff);

  if (CloseBlob(image) == MagickFalse)

    status=MagickFalse;

  return(status);

}