/*
% Copyright (C) 2003 GraphicsMagick Group
% Copyright (C) 2002 ImageMagick Studio
% Copyright 1991-1999 E. I. du Pont de Nemours and Company
%
% 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.
%
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%                            PPPP   DDDD   FFFFF                              %
%                            P   P  D   D  F                                  %
%                            PPPP   D   D  FFF                                %
%                            P      D   D  F                                  %
%                            P      DDDD   F                                  %
%                                                                             %
%                                                                             %
%                   Read/Write GraphicsMagick Image Format.                   %
%                                                                             %
%                                                                             %
%                              Software Design                                %
%                                John Cristy                                  %
%                                 July 1992                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%
*/

/*
  Include declarations.
*/
#include "magick/studio.h"
#include "magick/attribute.h"
#include "magick/blob.h"
#include "magick/cache.h"
#include "magick/color.h"
#include "magick/compress.h"
#include "magick/constitute.h"
#include "magick/delegate.h"
#include "magick/magick.h"
#include "magick/monitor.h"
#include "magick/shear.h"
#include "magick/resize.h"
#include "magick/utility.h"
#include "magick/tempfile.h"
#include "magick/version.h"
#if defined(HasTIFF)
#define CCITTParam  "-1"
#else
#define CCITTParam  "0"
#endif

/*
  Forward declarations.
*/
static unsigned int
  WritePDFImage(const ImageInfo *,Image *),
  ZLIBEncodeImage(Image *,const size_t,const unsigned long,unsigned char *);

#if defined(HasTIFF)
#if defined(HAVE_TIFFCONF_H)
#include "tiffconf.h"
#endif
#include "tiffio.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   H u f f m a n 2 D E n c o d e I m a g e                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method Huffman2DEncodeImage compresses an image via two-dimensional
%  Huffman-coding.
%
%  The format of the Huffman2DEncodeImage method is:
%
%      unsigned int Huffman2DEncodeImage(const ImageInfo *image_info,
%        Image *image)
%
%  A description of each parameter follows:
%
%    o status:  Method Huffman2DEncodeImage returns True if all the pixels are
%      compressed without error, otherwise False.
%
%    o image_info: The image info..
%
%    o image: The image.
%
*/
static unsigned int Huffman2DEncodeImage(const ImageInfo *image_info,
  Image *image)
{
  char
    filename[MaxTextExtent];

  Image
    *huffman_image;

  ImageInfo
    *clone_info;

  long
    count;

  register long
    i;

  TIFF
    *tiff;

  uint16
    fillorder;

  unsigned char
    *buffer;

  unsigned int
    status;

  unsigned long
    *byte_count,
    strip_size;

  /*
    Write image as CCITTFax4 TIFF image to a temporary file.
  */
  assert(image_info != (ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  if(!AcquireTemporaryFileName(filename))
    ThrowBinaryException(FileOpenError,"UnableToCreateTemporaryFile",
      filename);
  huffman_image=CloneImage(image,0,0,True,&image->exception);
  if (huffman_image == (Image *) NULL)
    return(False);
  SetImageType(huffman_image,BilevelType);
  FormatString(huffman_image->filename,"tiff:%s",filename);
  clone_info=CloneImageInfo(image_info);
  clone_info->compression=Group4Compression;
  status=WriteImage(clone_info,huffman_image);
  DestroyImageInfo(clone_info);
  DestroyImage(huffman_image);
  if (status == False)
    return(False);
  tiff=TIFFOpen(filename,"rb");
  if (tiff == (TIFF *) NULL)
    {
      LiberateTemporaryFile(filename);
      ThrowBinaryException(FileOpenError,"UnableToOpenFile",
        image_info->filename)
    }
  /*
    Allocate raw strip buffer.
  */
  (void) TIFFGetField(tiff,TIFFTAG_STRIPBYTECOUNTS,&byte_count);
  strip_size=byte_count[0];
  for (i=1; i < (long) TIFFNumberOfStrips(tiff); i++)
    if (byte_count[i] > strip_size)
      strip_size=byte_count[i];
  buffer=(unsigned char *) AcquireMemory(strip_size);
  if (buffer == (unsigned char *) NULL)
    {
      TIFFClose(tiff);
      LiberateTemporaryFile(filename);
      ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
        (char *) NULL)
    }
  /*
    Compress runlength encoded to 2D Huffman pixels.
  */
  (void) TIFFGetFieldDefaulted(tiff,TIFFTAG_FILLORDER,&fillorder);
  for (i=0; i < (long) TIFFNumberOfStrips(tiff); i++)
  {
    count=TIFFReadRawStrip(tiff,(uint32) i,buffer,(long) byte_count[i]);
    if (fillorder == FILLORDER_LSB2MSB)
      TIFFReverseBits(buffer,count);
  }
  LiberateMemory((void **) &buffer);
  TIFFClose(tiff);
  LiberateTemporaryFile(filename);
  return(True);
}
#else
static unsigned int Huffman2DEncodeImage(const ImageInfo *image_info,
  Image *image)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  ThrowBinaryException(MissingDelegateError,"TIFFLibraryIsNotAvailable",image->filename);
}
#endif

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   I s P D F                                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method IsPDF returns True if the image format type, identified by the
%  magick string, is PDF.
%
%  The format of the IsPDF method is:
%
%      unsigned int IsPDF(const unsigned char *magick,const size_t offset)
%
%  A description of each parameter follows:
%
%    o status:  Method IsPDF returns True if the image format type is PDF.
%
%    o magick: This string is generally the first few bytes of an image file
%      or blob.
%
%    o offset: Specifies the offset of the magick string.
%
%
*/
static unsigned int IsPDF(const unsigned char *magick,const size_t offset)
{
  if (offset < 5)
    return(False);
  if (LocaleNCompare((char *) magick,"%PDF-",5) == 0)
    return(True);
  return(False);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e a d P D F I m a g e                                                   %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method ReadPDFImage reads a Portable Document Format 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 ReadPDFImage method is:
%
%      Image *ReadPDFImage(const ImageInfo *image_info,ExceptionInfo *exception)
%
%  A description of each parameter follows:
%
%    o image:  Method ReadPDFImage 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 *ReadPDFImage(const ImageInfo *image_info,ExceptionInfo *exception)
{
#define MediaBox  "/MediaBox"
#define RenderPostscriptText  "  Rendering postscript...  "

  char
    density[MaxTextExtent],
    command[MaxTextExtent],
    filename[MaxTextExtent],
    geometry[MaxTextExtent],
    options[MaxTextExtent],
    postscript_filename[MaxTextExtent];

  const DelegateInfo
    *delegate_info;

  double
    dx_resolution,
    dy_resolution;

  FILE
    *file;

  Image
    *image,
    *next_image;

  ImageInfo
    *clone_info;

  int
    count,
    status;

  RectangleInfo
    box,
    page;

  register char
    *p,
    *q;

  register long
    c;

  SegmentInfo
    bounds;

  unsigned int
    portrait;

  unsigned long
    height,
    width;

  assert(image_info != (const ImageInfo *) NULL);
  assert(image_info->signature == MagickSignature);
  assert(exception != (ExceptionInfo *) NULL);
  assert(exception->signature == MagickSignature);
  if (image_info->monochrome)
    {
      delegate_info=GetDelegateInfo("gs-mono",(char *) NULL,exception);
      if (delegate_info == (const DelegateInfo *) NULL)
        return((Image *) NULL);
    }
  else
    {
      delegate_info=GetDelegateInfo("gs-color",(char *) NULL,exception);
      if (delegate_info == (const DelegateInfo *) NULL)
        return((Image *) NULL);
    }
  /*
    Open image file.
  */
  image=AllocateImage(image_info);
  status=OpenBlob(image_info,image,ReadBinaryBlobMode,exception);
  if (status == False)
    ThrowReaderException(FileOpenError,"UnableToOpenFile",image);
  /*
    Open temporary output file.
  */
  file=AcquireTemporaryFileStream(postscript_filename,BinaryFileIOMode);
  if (file == (FILE *) NULL)
    ThrowReaderTemporaryFileException(postscript_filename);
  /*
    Set the page density.
  */
  dx_resolution=72.0;
  dy_resolution=72.0;
  if ((image->x_resolution == 0.0) || (image->y_resolution == 0.0))
    {
      (void) strcpy(density,PSDensityGeometry);
      count=sscanf(density,"%lfx%lf",&image->x_resolution,&image->y_resolution);
      if (count != 2)
        image->y_resolution=image->x_resolution;
    }
  FormatString(density,"%gx%g",image->x_resolution,image->y_resolution);
  /*
    Determine page geometry from the PDF media box.
  */
  memset(&page,0,sizeof(RectangleInfo));
  memset(&box,0,sizeof(RectangleInfo));
  portrait=True;
  for (p=command; ; )
  {
    c=ReadBlobByte(image);
    if (c == EOF)
      break;
    (void) fputc(c,file);
    *p++=(char) c;
    if ((c != '\n') && (c != '\r') && ((p-command) < (MaxTextExtent-1)))
      continue;
    *p='\0';
    p=command;
    /*
      Continue unless this is a MediaBox statement.
    */
    if (LocaleNCompare(command,"/Rotate 90",10) == 0)
      portrait=False;
    q=strstr(command,MediaBox);
    if (q == (char *) NULL)
      continue;
    count=sscanf(q,"/MediaBox [%lf %lf %lf %lf",&bounds.x1,&bounds.y1,
      &bounds.x2,&bounds.y2);
    if (count != 4)
      count=sscanf(q,"/MediaBox[%lf %lf %lf %lf",&bounds.x1,&bounds.y1,
        &bounds.x2,&bounds.y2);
    if (count != 4)
      continue;
    if ((bounds.x1 > bounds.x2) || (bounds.y1 > bounds.y2))
      continue;
    /*
      Set Postscript render geometry.
    */
    width=(unsigned long) (bounds.x2-bounds.x1+0.5);
    height=(unsigned long) (bounds.y2-bounds.y1+0.5);
    if ((width <= box.width) && (height <= box.height))
      continue;
    page.width=width;
    page.height=height;
    box=page;
  }
  if ((page.width == 0) || (page.height == 0))
    {
      SetGeometry(image,&page);
      (void) GetGeometry(PSPageGeometry,&page.x,&page.y,&page.width,
        &page.height);
    }
  if (image_info->page != (char *) NULL)
    (void) GetGeometry(image_info->page,&page.x,&page.y,&page.width,
      &page.height);
  FormatString(geometry,"%lux%lu",
    (unsigned long) ceil(page.width*image->x_resolution/dx_resolution-0.5),
    (unsigned long) ceil(page.height*image->y_resolution/dy_resolution-0.5));
  if (ferror(file))
    {
      (void) fclose(file);
      ThrowReaderException(CorruptImageError,"AnErrorHasOccurredWritingToFile",
        image)
    }
  (void) fclose(file);
  CloseBlob(image);
  /*
    Use Ghostscript to convert Postscript image.
  */
  *options='\0';
  if (image_info->subrange != 0)
    FormatString(options,"-dFirstPage=%lu -dLastPage=%lu",
      image_info->subimage+1,image_info->subimage+image_info->subrange);
  if (image_info->authenticate != (char *) NULL)
    FormatString(options+strlen(options)," -sPDFPassword=%.1024s",
      image_info->authenticate);
  (void) strncpy(filename,image_info->filename,MaxTextExtent-1);
  clone_info=CloneImageInfo(image_info);
  if (!AcquireTemporaryFileName(clone_info->filename))
    {
      DestroyImageInfo(clone_info);
      ThrowReaderTemporaryFileException(clone_info->filename);
    }
  FormatString(command,delegate_info->commands,clone_info->antialias ? 4 : 1,
    clone_info->antialias ? 4 : 1,geometry,density,options,clone_info->filename,
    postscript_filename);
  (void) MagickMonitor(RenderPostscriptText,0,8,&image->exception);
  status=InvokePostscriptDelegate(clone_info->verbose,command);
  (void) MagickMonitor(RenderPostscriptText,7,8,&image->exception);
  if (status)
    {
      DestroyImageInfo(clone_info);
      LiberateTemporaryFile(postscript_filename);
      ThrowReaderException(DelegateError,"PostscriptDelegateFailed",image)
    }
  DestroyImage(image);
  clone_info->blob=(void *) NULL;
  clone_info->length=0;
  image=ReadImage(clone_info,exception);
  LiberateTemporaryFile(postscript_filename);
  (void) remove(clone_info->filename);
  DestroyImageInfo(clone_info);
  if (image == (Image *) NULL)
    ThrowReaderException(DelegateError,"DelegateFailed",image);
  do
  {
    (void) strcpy(image->magick,"PDF");
    (void) strncpy(image->filename,filename,MaxTextExtent-1);
    if (!image_info->ping && !portrait)
      {
        Image
          *rotate_image;

        /*
          Rotate image.
        */
        rotate_image=RotateImage(image,90,exception);
        if (rotate_image != (Image *) NULL)
          {
            DestroyImage(image);
            image=rotate_image;
          }
      }
    next_image=SyncNextImageInList(image);
    if (next_image != (Image *) NULL)
      image=next_image;
  } while (next_image != (Image *) NULL);
  while (image->previous != (Image *) NULL)
    image=image->previous;
  return(image);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   R e g i s t e r P D F I m a g e                                           %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method RegisterPDFImage adds attributes for the PDF 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 RegisterPDFImage method is:
%
%      RegisterPDFImage(void)
%
*/
ModuleExport void RegisterPDFImage(void)
{
  MagickInfo
    *entry;

  entry=SetMagickInfo("EPDF");
  entry->decoder=(DecoderHandler) ReadPDFImage;
  entry->encoder=(EncoderHandler) WritePDFImage;
  entry->adjoin=False;
  entry->blob_support=False;
  entry->seekable_stream=True;
  entry->description=AcquireString("Encapsulated Portable Document Format");
  entry->module=AcquireString("PDF");
  (void) RegisterMagickInfo(entry);

  entry=SetMagickInfo("PDF");
  entry->decoder=(DecoderHandler) ReadPDFImage;
  entry->encoder=(EncoderHandler) WritePDFImage;
  entry->magick=(MagickHandler) IsPDF;
  entry->blob_support=False;
  entry->seekable_stream=True;
  entry->description=AcquireString("Portable Document Format");
  entry->module=AcquireString("PDF");
  (void) RegisterMagickInfo(entry);
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   U n r e g i s t e r P D F I m a g e                                       %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method UnregisterPDFImage removes format registrations made by the
%  PDF module from the list of supported formats.
%
%  The format of the UnregisterPDFImage method is:
%
%      UnregisterPDFImage(void)
%
*/
ModuleExport void UnregisterPDFImage(void)
{
  (void) UnregisterMagickInfo("EPDF");
  (void) UnregisterMagickInfo("PDF");
}

/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   W r i t e P D F I m a g e                                                 %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method WritePDFImage writes an image in the Portable Document image
%  format.
%
%  The format of the WritePDFImage method is:
%
%      unsigned int WritePDFImage(const ImageInfo *image_info,Image *image)
%
%  A description of each parameter follows.
%
%    o status: Method WritePDFImage 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 char *EscapeParenthesis(const char *text)
{
  register char
    *p;

  register long
    i;

  static char
    buffer[MaxTextExtent];

  unsigned long
    escapes;

  escapes=0;
  p=buffer;
  for (i=0; i < (long) Min(strlen(text),(MaxTextExtent-escapes-1)); i++)
  {
    if ((text[i] == '(') || (text[i] == ')'))
      {
        *p++='\\';
        escapes++;
      }
    *p++=text[i];
  }
  *p='\0';
  return(buffer);
}

static unsigned int WritePDFImage(const ImageInfo *image_info,Image *image)
{
#define CFormat  "/Filter [ /%.1024s ]\n"
#define ObjectsPerImage  12

  char
    buffer[MaxTextExtent],
    date[MaxTextExtent],
    density[MaxTextExtent],
    **labels,
    page_geometry[MaxTextExtent];

  CompressionType
    compression;

  const ImageAttribute
    *attribute;

  double
    dx_resolution,
    dy_resolution,
    x_resolution,
    x_scale,
    y_resolution,
    y_scale;

  ExtendedSignedIntegralType
    offset;

  long
    count,
    y;

  Image
    *tile_image;

  RectangleInfo
    geometry,
    media_info;

  register const PixelPacket
    *p;

  register IndexPacket
    *indexes;

  register unsigned char
    *q;

  register long
    i,
    x;

  size_t
    length;

  struct tm
    *time_meridian;

  time_t
    seconds;

  unsigned char
    *pixels;

  unsigned int
    status;

  unsigned long
    info_id,
    number_pixels,
    object,
    pages_id,
    root_id,
    scene,
    text_size;

  ExtendedSignedIntegralType
    *xref;

  /*
    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);
  compression=image->compression;
  if (image_info->compression != UndefinedCompression)
    compression=image_info->compression;
  switch (compression)
  {
#if !defined(HasJPEG)
    case JPEGCompression:
    {
      compression=RLECompression;
      ThrowException(&image->exception,MissingDelegateError,
        "JPEGLibraryIsNotAvailable",image->filename);
      break;
    }
#endif
#if !defined(HasLZW)
    case LZWCompression:
    {
      compression=RLECompression;
      ThrowException(&image->exception,MissingDelegateError,
        "LZWEncodingNotEnabled",image->filename);
      break;
    }
#endif
#if !defined(HasZLIB)
    case ZipCompression:
    {
      compression=RLECompression;
      ThrowException(&image->exception,MissingDelegateError,
        "ZipLibraryIsNotAvailable",image->filename);
      break;
    }
#endif
    default:
      break;
  }
  /*
    Allocate X ref memory.
  */
  xref=(ExtendedSignedIntegralType *)
    AcquireMemory(2048*sizeof(ExtendedSignedIntegralType));
  if (xref == (ExtendedSignedIntegralType *) NULL)
    ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed",image);
  memset(xref,0,2048*sizeof(ExtendedSignedIntegralType));
  /*
    Write Info object.
  */
  object=0;
  (void) WriteBlobString(image,"%PDF-1.2 \n");
  xref[object++]=TellBlob(image);
  info_id=object;
  FormatString(buffer,"%lu 0 obj\n",object);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"<<\n");
  seconds=time((time_t *) NULL);
  time_meridian=localtime(&seconds);
  FormatString(date,"D:%04d%02d%02d%02d%02d%02d",time_meridian->tm_year+1900,
    time_meridian->tm_mon+1,time_meridian->tm_mday,time_meridian->tm_hour,
    time_meridian->tm_min,time_meridian->tm_sec);
  FormatString(buffer,"/CreationDate (%.1024s)\n",date);
  (void) WriteBlobString(image,buffer);
  FormatString(buffer,"/ModDate (%.1024s)\n",date);
  (void) WriteBlobString(image,buffer);
  FormatString(buffer,"/Producer (%.1024s)\n",
    EscapeParenthesis(GetMagickVersion((unsigned long *) NULL)));
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,">>\n");
  (void) WriteBlobString(image,"endobj\n");
  /*
    Write Catalog object.
  */
  xref[object++]=TellBlob(image);
  root_id=object;
  FormatString(buffer,"%lu 0 obj\n",object);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"<<\n");
  (void) WriteBlobString(image,"/Type /Catalog\n");
  FormatString(buffer,"/Pages %lu 0 R\n",object+1);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,">>\n");
  (void) WriteBlobString(image,"endobj\n");
  /*
    Write Pages object.
  */
  xref[object++]=TellBlob(image);
  pages_id=object;
  FormatString(buffer,"%lu 0 obj\n",object);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"<<\n");
  (void) WriteBlobString(image,"/Type /Pages\n");
  FormatString(buffer,"/Kids [ %lu 0 R ",object+1);
  (void) WriteBlobString(image,buffer);
  count=(long) (pages_id+ObjectsPerImage+1);
  if (image_info->adjoin)
    {
      Image
        *kid_image;

      /*
        Predict page object id's.
      */
      kid_image=image;
      for ( ; kid_image->next != (Image *) NULL; count+=ObjectsPerImage)
      {
        FormatString(buffer,"%ld 0 R ",count);
        (void) WriteBlobString(image,buffer);
        kid_image=kid_image->next;
      }
      ReacquireMemory((void **) &xref,
        (count+2048)*sizeof(ExtendedSignedIntegralType));
      if (xref == (ExtendedSignedIntegralType *) NULL)
        ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed",image);
    }
  (void) WriteBlobString(image,"]\n");
  FormatString(buffer,"/Count %lu\n",(count-pages_id)/ObjectsPerImage);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,">>\n");
  (void) WriteBlobString(image,"endobj\n");
  scene=0;
  do
  {
    /*
      Scale image to size of Portable Document page.
    */
    text_size=0;
    attribute=GetImageAttribute(image,"label");
    if (attribute != (const ImageAttribute *) NULL)
      text_size=(unsigned int)
        (MultilineCensus(attribute->value)*image_info->pointsize+12);
    SetGeometry(image,&geometry);
    geometry.y=(long) text_size;
    FormatString(page_geometry,"%lux%lu",image->columns,image->rows);
    if (image_info->page != (char *) NULL)
      (void) strncpy(page_geometry,image_info->page,MaxTextExtent-1);
    else
      if ((image->page.width != 0) && (image->page.height != 0))
        (void) FormatString(page_geometry,"%lux%lu%+ld%+ld",image->page.width,
          image->page.height,image->page.x,image->page.y);
      else
        if (LocaleCompare(image_info->magick,"PDF") == 0)
          (void) strcpy(page_geometry,PSPageGeometry);
    (void) GetMagickGeometry(page_geometry,&geometry.x,&geometry.y,
      &geometry.width,&geometry.height);
    (void) GetGeometry(page_geometry,&media_info.x,&media_info.y,
      &media_info.width,&media_info.height);
    /*
      Scale relative to dots-per-inch.
    */
    dx_resolution=72.0;
    dy_resolution=72.0;
    x_resolution=72.0;
    (void) strcpy(density,PSDensityGeometry);
    count=sscanf(density,"%lfx%lf",&x_resolution,&y_resolution);
    if (count != 2)
      y_resolution=x_resolution;
    if (image_info->density != (char *) NULL)
      {
        count=sscanf(image_info->density,"%lfx%lf",&x_resolution,&y_resolution);
        if (count != 2)
          y_resolution=x_resolution;
      }
    x_scale=(geometry.width*dx_resolution)/x_resolution;
    geometry.width=(unsigned long) (x_scale+0.5);
    y_scale=(geometry.height*dy_resolution)/y_resolution;
    geometry.height=(unsigned long) (y_scale+0.5);
    /*
      Write Page object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"<<\n");
    (void) WriteBlobString(image,"/Type /Page\n");
    FormatString(buffer,"/Parent %lu 0 R\n",pages_id);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"/Resources <<\n");
    FormatString(buffer,"/Font << /F%lu %lu 0 R >>\n",image->scene,object+4);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/XObject << /Im%lu %lu 0 R >>\n",image->scene,
      object+5);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/ProcSet %lu 0 R >>\n",object+3);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/MediaBox [0 0 %ld %ld]\n",
      media_info.width,media_info.height);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/CropBox [%ld %ld %ld %ld]\n",geometry.x,geometry.y,
      geometry.x+geometry.width,geometry.y+geometry.height);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Contents %lu 0 R\n",object+1);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Thumb %lu 0 R\n",object+8);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,">>\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Contents object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"<<\n");
    FormatString(buffer,"/Length %lu 0 R\n",object+1);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,">>\n");
    (void) WriteBlobString(image,"stream\n");
    offset=TellBlob(image);
    (void) WriteBlobString(image,"q\n");
    labels=(char **) NULL;
    attribute=GetImageAttribute(image,"label");
    if (attribute != (const ImageAttribute *) NULL)
      labels=StringToList(attribute->value);
    if (labels != (char **) NULL)
      {
        for (i=0; labels[i] != (char *) NULL; i++)
        {
          (void) WriteBlobString(image,"BT\n");
          FormatString(buffer,"/F%lu %g Tf\n",image->scene,
            image_info->pointsize);
          (void) WriteBlobString(image,buffer);
          FormatString(buffer,"%ld %g Td\n",geometry.x,geometry.y+
            geometry.height+i*image_info->pointsize+12);
          (void) WriteBlobString(image,buffer);
          FormatString(buffer,"(%.1024s) Tj\n",labels[i]);
          (void) WriteBlobString(image,buffer);
          (void) WriteBlobString(image,"ET\n");
          LiberateMemory((void **) &labels[i]);
        }
        LiberateMemory((void **) &labels);
      }
    FormatString(buffer,"%g 0 0 %g %ld %ld cm\n",x_scale,y_scale,geometry.x,
      geometry.y);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Im%lu Do\n",image->scene);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"Q\n");
    offset=TellBlob(image)-offset;
    (void) WriteBlobString(image,"endstream\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Length object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"%lu\n",(unsigned long) offset);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Procset object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    if ((image->storage_class == DirectClass) || (image->colors > 256))
      (void) strcpy(buffer,"[ /PDF /Text /ImageC");
    else
      if (compression == FaxCompression)
        (void) strcpy(buffer,"[ /PDF /Text /ImageB");
      else
        (void) strcpy(buffer,"[ /PDF /Text /ImageI");
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image," ]\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Font object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"<<\n");
    (void) WriteBlobString(image,"/Type /Font\n");
    (void) WriteBlobString(image,"/Subtype /Type1\n");
    FormatString(buffer,"/Name /F%lu\n",image->scene);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"/BaseFont /Helvetica\n");
    (void) WriteBlobString(image,"/Encoding /MacRomanEncoding\n");
    (void) WriteBlobString(image,">>\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write XObject object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"<<\n");
    (void) WriteBlobString(image,"/Type /XObject\n");
    (void) WriteBlobString(image,"/Subtype /Image\n");
    FormatString(buffer,"/Name /Im%lu\n",image->scene);
    (void) WriteBlobString(image,buffer);
    switch (compression)
    {
      case NoCompression: FormatString(buffer,CFormat,"ASCII85Decode"); break;
      case JPEGCompression: 
      {
        FormatString(buffer,CFormat,"DCTDecode"); 
        if (image->colorspace != CMYKColorspace)
          break;
        (void) WriteBlobString(image,buffer);
        (void) strcpy(buffer,"/Decode [1 0 1 0 1 0 1 0]\n");
        break;
      }
      case LZWCompression: FormatString(buffer,CFormat,"LZWDecode"); break;
      case ZipCompression: FormatString(buffer,CFormat,"FlateDecode"); break;
      case FaxCompression:
      {
        (void) strcpy(buffer,"/Filter [ /CCITTFaxDecode ]\n");
        (void) WriteBlobString(image,buffer);
        FormatString(buffer,
          "/DecodeParms [ << >> << /K %.1024s /Columns %ld /Rows %ld >> ]\n",
          CCITTParam,image->columns,image->rows);
        break;
      }
      default: FormatString(buffer,CFormat,"RunLengthDecode"); break;
    }
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Width %lu\n",image->columns);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Height %lu\n",image->rows);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/ColorSpace %lu 0 R\n",object+2);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/BitsPerComponent %d\n",
      compression == FaxCompression ? 1 : 8);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Length %lu 0 R\n",object+1);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,">>\n");
    (void) WriteBlobString(image,"stream\n");
    offset=TellBlob(image);
    number_pixels=image->columns*image->rows;
    if ((compression == FaxCompression) ||
        ((image_info->type != TrueColorType) &&
         IsGrayImage(image,&image->exception)))
      {
        switch (compression)
        {
          case FaxCompression:
          {
            if (LocaleCompare(CCITTParam,"0") == 0)
              {
                (void) HuffmanEncodeImage(image_info,image);
                break;
              }
            (void) Huffman2DEncodeImage(image_info,image);
            break;
          }
          case JPEGCompression:
          {
            Image
              *jpeg_image;

            size_t
              length;

            void
              *blob;

            /*
              Write image in JPEG format.
            */
            jpeg_image=CloneImage(image,0,0,True,&image->exception);
            if (jpeg_image == (Image *) NULL)
              ThrowWriterException(CoderError,image->exception.reason,image);
            (void) strcpy(jpeg_image->magick,"JPEG");
            blob=ImageToBlob(image_info,jpeg_image,&length,&image->exception);
            (void) WriteBlob(image,length,blob);
            DestroyImage(jpeg_image);
            LiberateMemory((void **) &blob);
            break;
          }
          case RLECompression:
          default:
          {
            /*
              Allocate pixel array.
            */
            length=number_pixels;
            pixels=(unsigned char *) AcquireMemory(length);
            if (pixels == (unsigned char *) NULL)
              ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed",
                image);
            /*
              Dump Runlength encoded pixels.
            */
            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;
              for (x=0; x < (long) image->columns; x++)
              {
                *q++=ScaleQuantumToChar(PixelIntensityToQuantum(p));
                p++;
              }
              if (image->previous == (Image *) NULL)
                if (QuantumTick(y,image->rows))
                  {
                    status=MagickMonitor(SaveImageText,y,image->rows,
                      &image->exception);
                    if (status == False)
                      break;
                  }
            }
            if (compression == ZipCompression)
              status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
            else
              if (compression == LZWCompression)
                status=LZWEncodeImage(image,length,pixels);
              else
                status=PackbitsEncodeImage(image,length,pixels);
            LiberateMemory((void **) &pixels);
            if (!status)
              {
                CloseBlob(image);
                return(False);
              }
            break;
          }
          case NoCompression:
          {
            /*
              Dump uncompressed PseudoColor packets.
            */
            Ascii85Initialize(image);
            for (y=0; y < (long) image->rows; y++)
            {
              p=AcquireImagePixels(image,0,y,image->columns,1,
                &image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) image->columns; x++)
              {
                Ascii85Encode(image,
                  ScaleQuantumToChar(PixelIntensityToQuantum(p)));
                p++;
              }
              if (image->previous == (Image *) NULL)
                if (QuantumTick(y,image->rows))
                  {
                    status=MagickMonitor(SaveImageText,y,image->rows,
                      &image->exception);
                    if (status == False)
                      break;
                  }
            }
            Ascii85Flush(image);
            break;
          }
        }
      }
    else
      if ((image->storage_class == DirectClass) || (image->colors > 256) ||
          (compression == JPEGCompression))
        switch (compression)
        {
          case JPEGCompression:
          {
            Image
              *jpeg_image;

            size_t
              length;

            void
              *blob;

            /*
              Write image in JPEG format.
            */
            jpeg_image=CloneImage(image,0,0,True,&image->exception);
            if (jpeg_image == (Image *) NULL)
              ThrowWriterException(CoderError,image->exception.reason,image);
            (void) strcpy(jpeg_image->magick,"JPEG");
            blob=ImageToBlob(image_info,jpeg_image,&length,&image->exception);
            (void) WriteBlob(image,length,blob);
            DestroyImage(jpeg_image);
            LiberateMemory((void **) &blob);
            break;
          }
          case RLECompression:
          default:
          {
            /*
              Allocate pixel array.
            */
            length=(image->colorspace == CMYKColorspace ? 4 : 3)*number_pixels;
            pixels=(unsigned char *) AcquireMemory(length);
            if (pixels == (unsigned char *) NULL)
              ThrowWriterException(ResourceLimitError,"MemoryAllocationFailed",
                image);
            /*
              Dump runoffset encoded pixels.
            */
            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;
              for (x=0; x < (long) image->columns; x++)
              {
                if (image->matte && (p->opacity == TransparentOpacity))
                  {
                    *q++=ScaleQuantumToChar(MaxRGB);
                    *q++=ScaleQuantumToChar(MaxRGB);
                    *q++=ScaleQuantumToChar(MaxRGB);
                    p++;
                    continue;
                  }
                *q++=ScaleQuantumToChar(p->red);
                *q++=ScaleQuantumToChar(p->green);
                *q++=ScaleQuantumToChar(p->blue);
                if (image->colorspace == CMYKColorspace)
                  *q++=ScaleQuantumToChar(p->opacity);
                p++;
              }
              if (image->previous == (Image *) NULL)
                if (QuantumTick(y,image->rows))
                  {
                    status=MagickMonitor(SaveImageText,y,image->rows,
                      &image->exception);
                    if (status == False)
                      break;
                  }
            }
            if (compression == ZipCompression)
              status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
            else
              if (compression == LZWCompression)
                status=LZWEncodeImage(image,length,pixels);
              else
                status=PackbitsEncodeImage(image,length,pixels);
            LiberateMemory((void **) &pixels);
            if (!status)
              {
                CloseBlob(image);
                return(False);
              }
            break;
          }
          case NoCompression:
          {
            /*
              Dump uncompressed DirectColor packets.
            */
            Ascii85Initialize(image);
            for (y=0; y < (long) image->rows; y++)
            {
              p=AcquireImagePixels(image,0,y,image->columns,1,
                &image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) image->columns; x++)
              {
                if (image->matte && (p->opacity == TransparentOpacity))
                  {
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    continue;
                  }
                Ascii85Encode(image,ScaleQuantumToChar(p->red));
                Ascii85Encode(image,ScaleQuantumToChar(p->green));
                Ascii85Encode(image,ScaleQuantumToChar(p->blue));
                if (image->colorspace == CMYKColorspace)
                  Ascii85Encode(image,ScaleQuantumToChar(p->opacity));
                p++;
              }
              if (image->previous == (Image *) NULL)
                if (QuantumTick(y,image->rows))
                  {
                    status=MagickMonitor(SaveImageText,y,image->rows,
                      &image->exception);
                    if (status == False)
                      break;
                  }
            }
            Ascii85Flush(image);
            break;
          }
        }
      else
        {
          /*
            Dump number of colors and colormap.
          */
          switch (compression)
          {
            case RLECompression:
            default:
            {
              /*
                Allocate pixel array.
              */
              length=number_pixels;
              pixels=(unsigned char *) AcquireMemory(length);
              if (pixels == (unsigned char *) NULL)
                ThrowWriterException(ResourceLimitError,
                  "MemoryAllocationFailed",image);
              /*
                Dump Runlength encoded pixels.
              */
              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);
                for (x=0; x < (long) image->columns; x++)
                  *q++=indexes[x];
                if (image->previous == (Image *) NULL)
                  if (QuantumTick(y,image->rows))
                    {
                      status=MagickMonitor(SaveImageText,y,image->rows,
                        &image->exception);
                      if (status == False)
                        break;
                    }
              }
              if (compression == ZipCompression)
                status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
              else
                if (compression == LZWCompression)
                  status=LZWEncodeImage(image,length,pixels);
                else
                  status=PackbitsEncodeImage(image,length,pixels);
              LiberateMemory((void **) &pixels);
              if (!status)
                {
                  CloseBlob(image);
                  return(False);
                }
              break;
            }
            case NoCompression:
            {
              /*
                Dump uncompressed PseudoColor packets.
              */
              Ascii85Initialize(image);
              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);
                for (x=0; x < (long) image->columns; x++)
                  Ascii85Encode(image,indexes[x]);
                if (image->previous == (Image *) NULL)
                  if (QuantumTick(y,image->rows))
                    {
                      status=MagickMonitor(SaveImageText,y,image->rows,
                        &image->exception);
                      if (status == False)
                        break;
                    }
              }
              Ascii85Flush(image);
              break;
            }
          }
        }
    offset=TellBlob(image)-offset;
    (void) WriteBlobString(image,"\nendstream\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Length object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"%lu\n",(unsigned long) offset);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Colorspace object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    if (image->colorspace == CMYKColorspace)
      (void) strcpy(buffer,"/DeviceCMYK\n");
    else
      if ((compression == FaxCompression) ||
          ((image_info->type != TrueColorType) &&
           IsGrayImage(image,&image->exception)))
          (void) strcpy(buffer,"/DeviceGray\n");
      else
        if ((image->storage_class == DirectClass) || (image->colors > 256) ||
            (compression == JPEGCompression))
          (void) strcpy(buffer,"/DeviceRGB\n");
        else
          FormatString(buffer,"[ /Indexed /DeviceRGB %lu %lu 0 R ]\n",
            image->colors-1,object+3);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Thumb object.
    */
    SetGeometry(image,&geometry);
    (void) GetMagickGeometry("106x106+0+0>",&geometry.x,&geometry.y,
      &geometry.width,&geometry.height);
    tile_image=ResizeImage(image,geometry.width,geometry.height,TriangleFilter,
      1.0,&image->exception);
    if (tile_image == (Image *) NULL)
      ThrowWriterException(ResourceLimitError,image->exception.reason,image);
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"<<\n");
    switch (compression)
    {
      case NoCompression: FormatString(buffer,CFormat,"ASCII85Decode"); break;
      case JPEGCompression:
      {
        FormatString(buffer,CFormat,"DCTDecode"); 
        if (image->colorspace != CMYKColorspace)
          break;
        (void) WriteBlobString(image,buffer);
        (void) strcpy(buffer,"/Decode [1 0 1 0 1 0 1 0]\n");
        break;
      }
      case LZWCompression: FormatString(buffer,CFormat,"LZWDecode"); break;
      case ZipCompression: FormatString(buffer,CFormat,"FlateDecode"); break;
      case FaxCompression:
      {
        (void) strcpy(buffer,"/Filter [ /CCITTFaxDecode ]\n");
        (void) WriteBlobString(image,buffer);
        FormatString(buffer,
          "/DecodeParms [ << >> << /K %.1024s /Columns %lu /Rows %lu >> ]\n",
          CCITTParam,image->columns,image->rows);
        break;
      }
      default: FormatString(buffer,CFormat,"RunLengthDecode"); break;
    }
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Width %lu\n",tile_image->columns);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Height %lu\n",tile_image->rows);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/ColorSpace %lu 0 R\n",object-1);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/BitsPerComponent %d\n",
      compression == FaxCompression ? 1 : 8);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"/Length %lu 0 R\n",object+1);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,">>\n");
    (void) WriteBlobString(image,"stream\n");
    offset=TellBlob(image);
    number_pixels=tile_image->columns*tile_image->rows;
    if ((compression == FaxCompression) ||
        ((image_info->type != TrueColorType) &&
         IsGrayImage(tile_image,&image->exception)))
      {
        switch (compression)
        {
          case FaxCompression:
          {
            if (LocaleCompare(CCITTParam,"0") == 0)
              (void) HuffmanEncodeImage(image_info,tile_image);
            else
              (void) Huffman2DEncodeImage(image_info,tile_image);
            break;
          }
          case JPEGCompression:
          {
            Image
              *jpeg_image;

            size_t
              length;

            void
              *blob;

            /*
              Write image in JPEG format.
            */
            jpeg_image=CloneImage(tile_image,0,0,True,&image->exception);
            if (jpeg_image == (Image *) NULL)
              ThrowWriterException(CoderError,image->exception.reason,image);
            blob=ImageToBlob(image_info,jpeg_image,&length,&image->exception);
            (void) WriteBlob(image,length,blob);
            DestroyImage(jpeg_image);
            LiberateMemory((void **) &blob);
            break;
          }
          case RLECompression:
          default:
          {
            /*
              Allocate pixel array.
            */
            length=number_pixels;
            pixels=(unsigned char *) AcquireMemory(length);
            if (pixels == (unsigned char *) NULL)
              {
                DestroyImage(tile_image);
                ThrowWriterException(ResourceLimitError,
                  "MemoryAllocationFailed",image)
              }
            /*
              Dump Runlength encoded pixels.
            */
            q=pixels;
            for (y=0; y < (long) tile_image->rows; y++)
            {
              p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                &tile_image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) tile_image->columns; x++)
              {
                *q++=ScaleQuantumToChar(PixelIntensityToQuantum(p));
                p++;
              }
            }
            if (compression == ZipCompression)
              status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
            else
              if (compression == LZWCompression)
                status=LZWEncodeImage(image,length,pixels);
              else
                status=PackbitsEncodeImage(image,length,pixels);
            LiberateMemory((void **) &pixels);
            if (!status)
              {
                CloseBlob(image);
                return(False);
              }
            break;
          }
          case NoCompression:
          {
            /*
              Dump uncompressed PseudoColor packets.
            */
            Ascii85Initialize(image);
            for (y=0; y < (long) tile_image->rows; y++)
            {
              p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                &tile_image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) tile_image->columns; x++)
              {
                Ascii85Encode(image,
                  ScaleQuantumToChar(PixelIntensityToQuantum(p)));
                p++;
              }
            }
            Ascii85Flush(image);
            break;
          }
        }
      }
    else
      if ((tile_image->storage_class == DirectClass) ||
          (tile_image->colors > 256) || (compression == JPEGCompression))
        switch (compression)
        {
          case JPEGCompression:
          {
            Image
              *jpeg_image;

            size_t
              length;

            void
              *blob;

            /*
              Write image in JPEG format.
            */
            jpeg_image=CloneImage(tile_image,0,0,True,&image->exception);
            if (jpeg_image == (Image *) NULL)
              ThrowWriterException(CoderError,image->exception.reason,image);
            blob=ImageToBlob(image_info,jpeg_image,&length,&image->exception);
            (void) WriteBlob(image,length,blob);
            DestroyImage(jpeg_image);
            LiberateMemory((void **) &blob);
            break;
          }
          case RLECompression:
          default:
          {
            /*
              Allocate pixel array.
            */
            length=(tile_image->colorspace == CMYKColorspace ? 4 : 3)*
              number_pixels;
            pixels=(unsigned char *) AcquireMemory(length);
            if (pixels == (unsigned char *) NULL)
              {
                DestroyImage(tile_image);
                ThrowWriterException(ResourceLimitError,
                  "MemoryAllocationFailed",image)
              }
            /*
              Dump runoffset encoded pixels.
            */
            q=pixels;
            for (y=0; y < (long) tile_image->rows; y++)
            {
              p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                &tile_image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) tile_image->columns; x++)
              {
                if (tile_image->matte && (p->opacity == TransparentOpacity))
                  {
                    *q++=ScaleQuantumToChar(MaxRGB);
                    *q++=ScaleQuantumToChar(MaxRGB);
                    *q++=ScaleQuantumToChar(MaxRGB);
                    continue;
                  }
                *q++=ScaleQuantumToChar(p->red);
                *q++=ScaleQuantumToChar(p->green);
                *q++=ScaleQuantumToChar(p->blue);
                if (image->colorspace == CMYKColorspace)
                  *q++=ScaleQuantumToChar(p->opacity);
                p++;
              }
            }
            if (compression == ZipCompression)
              status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
            else
              if (compression == LZWCompression)
                status=LZWEncodeImage(image,length,pixels);
              else
                status=PackbitsEncodeImage(image,length,pixels);
            LiberateMemory((void **) &pixels);
            if (!status)
              {
                CloseBlob(image);
                return(False);
              }
            break;
          }
          case NoCompression:
          {
            /*
              Dump uncompressed DirectColor packets.
            */
            Ascii85Initialize(image);
            for (y=0; y < (long) tile_image->rows; y++)
            {
              p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                &tile_image->exception);
              if (p == (const PixelPacket *) NULL)
                break;
              for (x=0; x < (long) tile_image->columns; x++)
              {
                if (tile_image->matte && (p->opacity == TransparentOpacity))
                  {
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    Ascii85Encode(image,ScaleQuantumToChar(MaxRGB));
                    continue;
                  }
                Ascii85Encode(image,ScaleQuantumToChar(p->red));
                Ascii85Encode(image,ScaleQuantumToChar(p->green));
                Ascii85Encode(image,ScaleQuantumToChar(p->blue));
                if (image->colorspace == CMYKColorspace)
                  Ascii85Encode(image,ScaleQuantumToChar(p->opacity));
                p++;
              }
            }
            Ascii85Flush(image);
            break;
          }
        }
      else
        {
          /*
            Dump number of colors and colormap.
          */
          switch (compression)
          {
            case RLECompression:
            default:
            {
              /*
                Allocate pixel array.
              */
              length=number_pixels;
              pixels=(unsigned char *) AcquireMemory(length);
              if (pixels == (unsigned char *) NULL)
                {
                  DestroyImage(tile_image);
                  ThrowWriterException(ResourceLimitError,
                    "MemoryAllocationFailed",image)
                }
              /*
                Dump Runlength encoded pixels.
              */
              q=pixels;
              for (y=0; y < (long) tile_image->rows; y++)
              {
                p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                  &tile_image->exception);
                if (p == (const PixelPacket *) NULL)
                  break;
                indexes=GetIndexes(tile_image);
                for (x=0; x < (long) tile_image->columns; x++)
                  *q++=indexes[x];
              }
              if (compression == ZipCompression)
                status=ZLIBEncodeImage(image,length,image_info->quality,pixels);
              else
                if (compression == LZWCompression)
                  status=LZWEncodeImage(image,length,pixels);
                else
                  status=PackbitsEncodeImage(image,length,pixels);
              LiberateMemory((void **) &pixels);
              if (!status)
                {
                  CloseBlob(image);
                  return(False);
                }
              break;
            }
            case NoCompression:
            {
              /*
                Dump uncompressed PseudoColor packets.
              */
              Ascii85Initialize(image);
              for (y=0; y < (long) tile_image->rows; y++)
              {
                p=AcquireImagePixels(tile_image,0,y,tile_image->columns,1,
                  &tile_image->exception);
                if (p == (const PixelPacket *) NULL)
                  break;
                indexes=GetIndexes(tile_image);
                for (x=0; x < (long) tile_image->columns; x++)
                  Ascii85Encode(image,indexes[x]);
              }
              Ascii85Flush(image);
              break;
            }
          }
        }
    DestroyImage(tile_image);
    offset=TellBlob(image)-offset;
    (void) WriteBlobString(image,"\nendstream\n");
    (void) WriteBlobString(image,"endobj\n");
    /*
      Write Length object.
    */
    xref[object++]=TellBlob(image);
    FormatString(buffer,"%lu 0 obj\n",object);
    (void) WriteBlobString(image,buffer);
    FormatString(buffer,"%lu\n",(unsigned long) offset);
    (void) WriteBlobString(image,buffer);
    (void) WriteBlobString(image,"endobj\n");
    if ((image->storage_class == DirectClass) || (image->colors > 256) ||
        (compression == FaxCompression))
      {
        xref[object++]=0;
        xref[object++]=0;
      }
    else
      {
        /*
          Write Colormap object.
        */
        xref[object++]=TellBlob(image);
        FormatString(buffer,"%lu 0 obj\n",object);
        (void) WriteBlobString(image,buffer);
        (void) WriteBlobString(image,"<<\n");
        if (compression == NoCompression)
          (void) WriteBlobString(image,"/Filter [ /ASCII85Decode ]\n");
        FormatString(buffer,"/Length %lu 0 R\n",object+1);
        (void) WriteBlobString(image,buffer);
        (void) WriteBlobString(image,">>\n");
        (void) WriteBlobString(image,"stream\n");
        offset=TellBlob(image);
        if (compression == NoCompression)
          Ascii85Initialize(image);
        for (i=0; i < (long) image->colors; i++)
        {
          if (compression == NoCompression)
            {
              Ascii85Encode(image,ScaleQuantumToChar(image->colormap[i].red));
              Ascii85Encode(image,ScaleQuantumToChar(image->colormap[i].green));
              Ascii85Encode(image,ScaleQuantumToChar(image->colormap[i].blue));
              continue;
            }
          (void) WriteBlobByte(image,
            ScaleQuantumToChar(image->colormap[i].red));
          (void) WriteBlobByte(image,
            ScaleQuantumToChar(image->colormap[i].green));
          (void) WriteBlobByte(image,
            ScaleQuantumToChar(image->colormap[i].blue));
        }
        if (compression == NoCompression)
          Ascii85Flush(image);
        offset=TellBlob(image)-offset;
        (void) WriteBlobString(image,"\nendstream\n");
        (void) WriteBlobString(image,"endobj\n");
        /*
          Write Length object.
        */
        xref[object++]=TellBlob(image);
        FormatString(buffer,"%lu 0 obj\n",object);
        (void) WriteBlobString(image,buffer);
        FormatString(buffer,"%lu\n",(unsigned long) offset);
        (void) WriteBlobString(image,buffer);
        (void) WriteBlobString(image,"endobj\n");
      }
    if (image->next == (Image *) NULL)
      break;
    image=SyncNextImageInList(image);
    status=MagickMonitor(SaveImagesText,scene++,GetImageListLength(image),
      &image->exception);
    if (status == False)
      break;
  } while (image_info->adjoin);
  if (image_info->adjoin)
    while (image->previous != (Image *) NULL)
      image=image->previous;
  /*
    Write Xref object.
  */
  offset=TellBlob(image)-xref[0]+10;
  (void) WriteBlobString(image,"xref\n");
  FormatString(buffer,"0 %lu\n",object+1);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"0000000000 65535 f \n");
  for (i=0; i < (long) object; i++)
  {
    FormatString(buffer,"%010lu 00000 n \n",(unsigned long) xref[i]);
    (void) WriteBlobString(image,buffer);
  }
  (void) WriteBlobString(image,"trailer\n");
  (void) WriteBlobString(image,"<<\n");
  FormatString(buffer,"/Size %lu\n",object+1);
  (void) WriteBlobString(image,buffer);
  FormatString(buffer,"/Info %lu 0 R\n",info_id);
  (void) WriteBlobString(image,buffer);
  FormatString(buffer,"/Root %lu 0 R\n",root_id);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,">>\n");
  (void) WriteBlobString(image,"startxref\n");
  FormatString(buffer,"%lu\n",(unsigned long) offset);
  (void) WriteBlobString(image,buffer);
  (void) WriteBlobString(image,"%%EOF\n");
  LiberateMemory((void **) &xref);
  CloseBlob(image);
  return(True);
}

#if defined(HasZLIB)
#include "zlib.h"
/*
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%                                                                             %
%                                                                             %
%                                                                             %
%   Z L I B E n c o d e I m a g e                                             %
%                                                                             %
%                                                                             %
%                                                                             %
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
%
%  Method ZLIBEncodeImage compresses an image via ZLIB-coding specific to
%  Postscript Level II or Portable Document Format.  To ensure portability, the
%  binary ZLIB bytes are encoded as ASCII base-85.
%
%  The format of the ZLIBEncodeImage method is:
%
%      unsigned int ZLIBEncodeImage(Image *image,const size_t length,
%        const unsigned long quality,unsigned char *pixels)
%
%  A description of each parameter follows:
%
%    o status:  Method ZLIBEncodeImage returns True if all the pixels are
%      compressed without error, otherwise False.
%
%    o file: The address of a structure of type FILE.  ZLIB encoded pixels
%      are written to this file.
%
%    o length:  A value that specifies the number of pixels to compress.
%
%    o quality: the compression level (0-100).
%
%    o pixels: The address of an unsigned array of characters containing the
%      pixels to compress.
%
%
*/
static unsigned int ZLIBEncodeImage(Image *image,const size_t length,
  const unsigned long quality,unsigned char *pixels)
{
  int
    status;

  register long
    i;

  unsigned char
    *compressed_pixels;

  unsigned long
    compressed_packets;

  z_stream
    stream;

  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  compressed_packets=(unsigned long) (1.001*length+12);
  compressed_pixels=(unsigned char *) AcquireMemory(compressed_packets);
  if (compressed_pixels == (unsigned char *) NULL)
    ThrowBinaryException(ResourceLimitError,"MemoryAllocationFailed",
      (char *) NULL);
  stream.next_in=pixels;
  stream.avail_in=(unsigned int) length;
  stream.next_out=compressed_pixels;
  stream.avail_out=(unsigned int) compressed_packets;
  stream.zalloc=(alloc_func) NULL;
  stream.zfree=(free_func) NULL;
  stream.opaque=(voidpf) NULL;
  status=deflateInit(&stream,(int) Min(quality/10,9));
  if (status == Z_OK)
    {
      status=deflate(&stream,Z_FINISH);
      if (status == Z_STREAM_END)
        status=deflateEnd(&stream);
      else
        (void) deflateEnd(&stream);
      compressed_packets=stream.total_out;
    }
  if (status)
    ThrowBinaryException(CoderError,"UnableToZipCompressImage",(char *) NULL)
  else
    for (i=0; i < (long) compressed_packets; i++)
      (void) WriteBlobByte(image,compressed_pixels[i]);
  LiberateMemory((void **) &compressed_pixels);
  return(!status);
}
#else
static unsigned int ZLIBEncodeImage(Image *image,const size_t length,
  const unsigned long quality,unsigned char *pixels)
{
  assert(image != (Image *) NULL);
  assert(image->signature == MagickSignature);
  ThrowBinaryException(MissingDelegateError,"ZipLibraryIsNotAvailable",
    image->filename);
  return(False);
}
#endif
