//
// PWG/Apple Raster to PDF filter function for libcupsfilters.
//
// Copyright 2010 by Neil 'Superna' Armstrong <superna9999@gmail.com>
// Copyright 2012 by Tobias Hoffmann
// Copyright 2014-2022 by Till Kamppeter
// Copyright 2017 by Sahil Arora
//
// Licensed under Apache License v2.0.  See the file "LICENSE" for more
// information.
//


#include <config.h>

#include <sys/types.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdint.h>
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <limits>
#include <signal.h>
#include <cups/cups.h>
#include <cups/raster.h>
#include <cupsfilters/filter.h>
#include <cupsfilters/colormanager.h>
#include <cupsfilters/image.h>
#include <cupsfilters/ipp.h>
#include <cupsfilters/libcups2-private.h>

#include <arpa/inet.h>   // ntohl

#include <vector>
#include <qpdf/QPDF.hh>
#include <qpdf/QPDFWriter.hh>
#include <qpdf/QUtil.hh>

#include <qpdf/Pl_Flate.hh>
#include <qpdf/Pl_Buffer.hh>
#include <qpdf/Pl_RunLength.hh>
#include <qpdf/Pl_DCT.hh>

#ifdef USE_LCMS1
#include <lcms.h>
#define cmsColorSpaceSignature icColorSpaceSignature
#define cmsSetLogErrorHandler cmsSetErrorHandler
#define cmsSigXYZData icSigXYZData
#define cmsSigLuvData icSigLuvData
#define cmsSigLabData icSigLabData
#define cmsSigYCbCrData icSigYCbCrData
#define cmsSigYxyData icSigYxyData
#define cmsSigRgbData icSigRgbData
#define cmsSigHsvData icSigHsvData
#define cmsSigHlsData icSigHlsData
#define cmsSigCmyData icSigCmyData
#define cmsSig3colorData icSig3colorData
#define cmsSigGrayData icSigGrayData
#define cmsSigCmykData icSigCmykData
#define cmsSig4colorData icSig4colorData
#define cmsSig2colorData icSig2colorData
#define cmsSig5colorData icSig5colorData
#define cmsSig6colorData icSig6colorData
#define cmsSig7colorData icSig7colorData
#define cmsSig8colorData icSig8colorData
#define cmsSig9colorData icSig9colorData
#define cmsSig10colorData icSig10colorData
#define cmsSig11colorData icSig11colorData
#define cmsSig12colorData icSig12colorData
#define cmsSig13colorData icSig13colorData
#define cmsSig14colorData icSig14colorData
#define cmsSig15colorData icSig15colorData
#define cmsSaveProfileToMem _cmsSaveProfileToMem
#else
#include <lcms2.h>
#endif

#define DEFAULT_PDF_UNIT 72   // 1/72 inch

#define PRE_COMPRESS


// Compression method for providing data to PCLm Streams.
typedef enum compression_method_e
{
  DCT_DECODE = 0,
  FLATE_DECODE,
  RLE_DECODE
} compression_method_t;

// Color conversion function
typedef unsigned char *(*convert_function)(unsigned char *src,
					   unsigned char *dst,
					   unsigned int pixels);

// Bit conversion function
typedef unsigned char *(*bit_convert_function)(unsigned char *src,
					       unsigned char *dst,
					       unsigned int pixels);

typedef struct pwgtopdf_doc_s                  // **** Document information ****
{
  cmsHPROFILE          colorProfile = NULL;    // ICC Profile to be applied to
					       // PDF
  int                  cm_disabled = 0;        // Flag raised if color
					       // management is disabled
  convert_function     conversion_function;    // Raster color conversion
					       // function
  bit_convert_function bit_function;           // Raster bit function
  FILE		       *outputfp;	       // Temporary file, if any
  cf_logfunc_t         logfunc;                // Logging function, NULL for no
					       // logging
  void                 *logdata;               // User data for logging
					       // function, can be NULL
  cf_filter_iscanceledfunc_t iscanceledfunc;   // Function returning 1 when
                                               // job is canceled, NULL for not
                                               // supporting stop on cancel
  void                 *iscanceleddata;        // User data for is-canceled
					       // function, can be NULL
} pwgtopdf_doc_t;

// PDF color conversion function
typedef void (*pdf_convert_function)(struct pdf_info * info,
				     pwgtopdf_doc_t *doc);


struct pdf_info // **** PDF ****
{
  pdf_info()
    : pagecount(0),
      width(0), height(0),
      line_bytes(0),
      bpp(0), bpc(0),
      pclm_num_strips(0),
      pclm_strip_height_preferred(16),  // default strip height
      pclm_strip_height(0),
      pclm_strip_height_supported(1, 16),
      pclm_compression_method_preferred(0),
      pclm_source_resolution_supported(0),
      pclm_source_resolution_default(""),
      pclm_raster_back_side(""),
      pclm_strip_data(0),
      render_intent(""),
      color_space(CUPS_CSPACE_K),
      page_width(0), page_height(0),
      outformat(CF_FILTER_OUT_FORMAT_PDF)
  {
  }

  QPDF pdf;
  QPDFObjectHandle page;
  unsigned pagecount;
  unsigned width;
  unsigned height;
  unsigned line_bytes;
  unsigned bpp;
  unsigned bpc;
  unsigned                  pclm_num_strips;
  unsigned                  pclm_strip_height_preferred;
  std::vector<unsigned>     pclm_strip_height;
  std::vector<unsigned>     pclm_strip_height_supported;
  std::vector<compression_method_t> pclm_compression_method_preferred;
  std::vector<std::string>  pclm_source_resolution_supported;
  std::string               pclm_source_resolution_default;
  std::string               pclm_raster_back_side;
  std::vector< std::shared_ptr<Buffer> > pclm_strip_data;
  std::string render_intent;
  cups_cspace_t color_space;
  std::shared_ptr<Buffer> page_data;
  double page_width,page_height;
  cf_filter_out_format_t outformat;
};


//
// Bit conversion functions
//

static unsigned char *
invert_bits(unsigned char *src,
	    unsigned char *dst,
	    unsigned int pixels)
{ 
  unsigned int i;

  // Invert black to grayscale...
  for (i = pixels, dst = src; i > 0; i --, dst ++)
    *dst = ~*dst;

  return (dst);
}	


static unsigned char *
no_bit_conversion(unsigned char *src,
		  unsigned char *dst,
		  unsigned int pixels)
{
  return (src);
}


//
// Color conversion functions
//

static unsigned char *
rgb_to_cmyk(unsigned char *src,
	    unsigned char *dst,
	    unsigned int pixels)
{
  cfImageRGBToCMYK(src, dst, pixels);
  return (dst);
}


static unsigned char *
white_to_cmyk(unsigned char *src,
	      unsigned char *dst,
	      unsigned int pixels)
{
  cfImageWhiteToCMYK(src, dst, pixels);
  return (dst);
}


static unsigned char *
cmyk_to_rgb(unsigned char *src,
	    unsigned char *dst,
	    unsigned int pixels)
{
  cfImageCMYKToRGB(src, dst, pixels);
  return (dst);
}


static unsigned char *
white_to_rgb(unsigned char *src,
	     unsigned char *dst,
	     unsigned int pixels)
{
  cfImageWhiteToRGB(src, dst, pixels);
  return (dst);
}


static unsigned char *
rgb_to_white(unsigned char *src,
	     unsigned char *dst,
	     unsigned int pixels)
{
  cfImageRGBToWhite(src, dst, pixels);
  return (dst);
}


static unsigned char *
cmyk_to_white(unsigned char *src,
	      unsigned char *dst,
	      unsigned int pixels)
{
  cfImageCMYKToWhite(src, dst, pixels);
  return (dst);
}


static unsigned char *
no_color_conversion(unsigned char *src,
		    unsigned char *dst,
		    unsigned int pixels)
{
  return (src);
}


//
// 'split_strings()' - Split a string to a vector of strings given some
//                     delimiters
//
// O - std::vector of std::string after splitting
// I - input string to be split
// I - string containing delimiters
//

static std::vector<std::string>
split_strings(std::string const &str,
	      std::string delimiters = ",")
{
  std::vector<std::string> vec(0);
  std::string value = "";
  bool push_flag = false;

  for (size_t i = 0; i < str.size(); i ++)
  {
    if (push_flag && !(value.empty()))
    {
      vec.push_back(value);
      push_flag = false;
      value.clear();
    }

    if (delimiters.find(str[i]) != std::string::npos)
      push_flag = true;
    else
      value += str[i];
  }
  if (!value.empty())
    vec.push_back(value);
  return (vec);
}


//
// 'num_digits()' - Calculates the number of digits in an integer
//
// O - number of digits in the input integer
// I - the integer whose digits needs to be calculated
//

static int
num_digits(int n)
{
  if (n == 0)
    return (1);
  int digits = 0;
  while (n)
  {
    ++digits;
    n /= 10;
  }
  return (digits);
}


//
// 'int_to_fwstring()' - Convert a number to fixed width string by padding
//                       with zeroes
// O - converted string
// I - the integee which needs to be converted to string
// I - width of string required
//

static std::string
int_to_fwstring(int n,
		int width)
{
  int num_zeroes = width - num_digits(n);
  if (num_zeroes < 0)
    num_zeroes = 0;
  return (std::string(num_zeroes, '0') + QUtil::int_to_string(n));
}


static int
create_pdf_file(struct pdf_info * info,
		const cf_filter_out_format_t &outformat)
{
  try
  {
    info->pdf.emptyPDF();
    info->outformat = outformat;
  }
  catch (...)
  {
    return (1);
  }
  return (0);
}


static QPDFObjectHandle
make_real_box(double x1,
	      double y1,
	      double x2,
	      double y2)
{
  QPDFObjectHandle ret = QPDFObjectHandle::newArray();
  ret.appendItem(QPDFObjectHandle::newReal(x1));
  ret.appendItem(QPDFObjectHandle::newReal(y1));
  ret.appendItem(QPDFObjectHandle::newReal(x2));
  ret.appendItem(QPDFObjectHandle::newReal(y2));
  return (ret);
}


static QPDFObjectHandle
make_integer_box(int x1,
		 int y1,
		 int x2,
		 int y2)
{
  QPDFObjectHandle ret = QPDFObjectHandle::newArray();
  ret.appendItem(QPDFObjectHandle::newInteger(x1));
  ret.appendItem(QPDFObjectHandle::newInteger(y1));
  ret.appendItem(QPDFObjectHandle::newInteger(x2));
  ret.appendItem(QPDFObjectHandle::newInteger(y2));
  return (ret);
}


//
// PDF color conversion functons...
//

static void
modify_pdf_color(struct pdf_info *info,
		 int bpp,
		 int bpc,
		 convert_function fn,
		 pwgtopdf_doc_t *doc)
{
  unsigned old_bpp = info->bpp;
  unsigned old_bpc = info->bpc;
  double old_ncolor = old_bpp / old_bpc;

  unsigned old_line_bytes = info->line_bytes;

  double new_ncolor = bpp / bpc;

  info->line_bytes = (unsigned)old_line_bytes * (new_ncolor / old_ncolor);
  info->bpp = bpp;
  info->bpc = bpc;
  doc->conversion_function = fn; 
}


static void
convert_pdf_no_conversion(struct pdf_info *info,
			  pwgtopdf_doc_t *doc)
{
  doc->conversion_function = no_color_conversion;
  doc->bit_function = no_bit_conversion;
}


static void
convert_pdf_cmyk_8_to_white_8(struct pdf_info *info,
			      pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 8, 8, cmyk_to_white, doc);
  doc->bit_function = no_bit_conversion;
}


static void
convert_pdf_rgb_8_to_white_8(struct pdf_info *info,
			     pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 8, 8, rgb_to_white, doc);
  doc->bit_function = no_bit_conversion;
}


static void
convert_pdf_cmyk_8_to_rgb_8(struct pdf_info *info,
			    pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 24, 8, cmyk_to_rgb, doc);
  doc->bit_function = no_bit_conversion;
}


static void
convert_pdf_white_8_to_rgb_8(struct pdf_info *info,
			     pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 24, 8, white_to_rgb, doc);
  doc->bit_function = invert_bits;
}


static void
convert_pdf_rgb_8_to_cmyk_8(struct pdf_info *info,
			    pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 32, 8, rgb_to_cmyk, doc);
  doc->bit_function = no_bit_conversion;
}


static void
convert_pdf_white_8_to_cmyk_8(struct pdf_info *info,
			      pwgtopdf_doc_t *doc)
{
  modify_pdf_color(info, 32, 8, white_to_cmyk, doc);
  doc->bit_function = invert_bits;
}


static void
convert_pdf_invert_colors(struct pdf_info *info,
			  pwgtopdf_doc_t *doc)
{
  doc->conversion_function = no_color_conversion;
  doc->bit_function = invert_bits;
}


//
// Create an '/ICCBased' array and embed a previously 
// set ICC Profile in the PDF
//

static QPDFObjectHandle
embed_icc_profile(QPDF &pdf,
		  pwgtopdf_doc_t *doc)
{
  if (doc->colorProfile == NULL)
    return (QPDFObjectHandle::newNull());

  // Return handler
  QPDFObjectHandle ret;
  // ICCBased array
  QPDFObjectHandle array = QPDFObjectHandle::newArray();
  // Profile stream dictionary
  QPDFObjectHandle iccstream;

  std::map<std::string,QPDFObjectHandle> dict;
  std::map<std::string,QPDFObjectHandle> streamdict;
  std::string n_value = "";
  std::string alternate_cs = "";
  std::shared_ptr<Buffer>ph;

#ifdef USE_LCMS1
  size_t profile_size;
#else
  unsigned int profile_size;
#endif

  cmsColorSpaceSignature css = cmsGetColorSpace(doc->colorProfile);

  // Write color component # for /ICCBased array in stream dictionary
  switch (css)
  {
    case cmsSigGrayData:
        n_value = "1";
        alternate_cs = "/DeviceGray";
        break;
    case cmsSigRgbData:
        n_value = "3";
        alternate_cs = "/DeviceRGB";
        break;
    case cmsSigCmykData:
        n_value = "4";
        alternate_cs = "/DeviceCMYK";
        break;
    default:
        if (doc->logfunc)
	  doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		       "cfFilterPWGToPDF: Failed to embed ICC Profile.");
        return (QPDFObjectHandle::newNull());
  }

  streamdict["/Alternate"] = QPDFObjectHandle::newName(alternate_cs);
  streamdict["/N"] = QPDFObjectHandle::newName(n_value);

  // Read profile into memory
  cmsSaveProfileToMem(doc->colorProfile, NULL, &profile_size);
  unsigned char *buff =
    (unsigned char *)calloc(profile_size, sizeof(unsigned char));
  cmsSaveProfileToMem(doc->colorProfile, buff, &profile_size);

  // Write ICC profile buffer into PDF
  auto bf = new Buffer(buff, profile_size);
  ph = std::shared_ptr<Buffer>(bf);  
  iccstream = QPDFObjectHandle::newStream(&pdf, ph);
  iccstream.replaceDict(QPDFObjectHandle::newDictionary(streamdict));

  array.appendItem(QPDFObjectHandle::newName("/ICCBased"));
  array.appendItem(iccstream);

  // Return a PDF object reference to an '/ICCBased' array
  ret = pdf.makeIndirectObject(array);

  free(buff);
  if (doc->logfunc)
    doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		 "cfFilterPWGToPDF: ICC Profile embedded in PDF.");

  return (ret);
}


static QPDFObjectHandle
embed_srgb_profile(QPDF &pdf,
		   pwgtopdf_doc_t *doc)
{
  QPDFObjectHandle iccbased_reference;

  // Create an sRGB profile from lcms
  doc->colorProfile = cmsCreate_sRGBProfile();
  // Embed it into the profile
  iccbased_reference = embed_icc_profile(pdf, doc);

  return (iccbased_reference);
}


//
// Calibration function for non-Lab PDF color spaces
// Requires white point data, and if available, gamma or matrix numbers.
//
// Output:
//   [/'color_space'
//      << /Gamma ['gamma[0]'...'gamma[n]']
//         /WhitePoint ['wp[0]' 'wp[1]' 'wp[2]']
//         /Matrix ['matrix[0]'...'matrix[n*n]']
//      >>
//   ]
//

static QPDFObjectHandle
get_calibration_array(const char *color_space,
		      double wp[],
		      double gamma[],
		      double matrix[],
		      double bp[])
{    
  // Check for invalid input
  if ((!strcmp("/CalGray", color_space) && matrix != NULL) ||
      wp == NULL)
    return (QPDFObjectHandle());

  QPDFObjectHandle ret;
  std::string csString = color_space;
  std::string colorSpaceArrayString = "";

  char gamma_str[128];
  char bp_str[256];
  char wp_str[256];
  char matrix_str[512];

  // Convert numbers into string data for /Gamma, /WhitePoint, and/or /Matrix

  // WhitePoint
  snprintf(wp_str, sizeof(wp_str), "/WhitePoint [%g %g %g]", 
	   wp[0], wp[1], wp[2]); 

  // Gamma
  if (!strcmp("/CalGray", color_space) && gamma != NULL)
    snprintf(gamma_str, sizeof(gamma_str), "/Gamma %g", 
	     gamma[0]);
  else if (!strcmp("/CalRGB", color_space) && gamma != NULL) 
    snprintf(gamma_str, sizeof(gamma_str), "/Gamma [%g %g %g]", 
	     gamma[0], gamma[1], gamma[2]); 
  else
    gamma_str[0] = '\0';

  // BlackPoint
  if (bp != NULL)
    snprintf(bp_str, sizeof(bp_str), "/BlackPoint [%g %g %g]", 
	     bp[0], bp[1], bp[2]); 
  else
    bp_str[0] = '\0';

  // Matrix
  if (!strcmp("/CalRGB", color_space) && matrix != NULL)
  {
    snprintf(matrix_str, sizeof(matrix_str),
	     "/Matrix [%g %g %g %g %g %g %g %g %g]", 
	     matrix[0], matrix[1], matrix[2],
	     matrix[3], matrix[4], matrix[5],
	     matrix[6], matrix[7], matrix[8]);
  }
  else
    matrix_str[0] = '\0';

  // Write array string...
  colorSpaceArrayString = "[" + csString + " <<" + gamma_str + " " + wp_str +
    " " + matrix_str + " " + bp_str + " >>]";
                       
  ret = QPDFObjectHandle::parse(colorSpaceArrayString);

  return (ret);
}


static QPDFObjectHandle
get_cal_rgb_array(double wp[3],
		  double gamma[3],
		  double matrix[9],
		  double bp[3])
{
  QPDFObjectHandle ret = get_calibration_array("/CalRGB", wp, gamma, matrix,
					       bp);
  return (ret);
}


static QPDFObjectHandle
get_cal_gray_array(double wp[3],
		   double gamma[1],
		   double bp[3])
{
  QPDFObjectHandle ret = get_calibration_array("/CalGray", wp, gamma, 0, bp);
  return (ret);
}


//
// 'make_pclm_strips()' - Return an std::vector of QPDFObjectHandle, each
//                        containing the stream data of the various strips
//                        which make up a PCLm page.
//
// O - std::vector of QPDFObjectHandle
// I - QPDF object
// I - number of strips per page
// I - std::vector of std::shared_ptr<Buffer> containing data for each strip
// I - strip width
// I - strip height
// I - color space
// I - bits per component
// I - document information
//

static std::vector<QPDFObjectHandle>
make_pclm_strips(QPDF &pdf,
		 unsigned num_strips,
		 std::vector< std::shared_ptr<Buffer> > &strip_data,
		 std::vector<compression_method_t> &compression_methods,
		 unsigned width, std::vector<unsigned>& strip_height,
		 cups_cspace_t cs,
		 unsigned bpc,
		 pwgtopdf_doc_t *doc)
{
  std::vector<QPDFObjectHandle> ret(num_strips);
  for (size_t i = 0; i < num_strips; i ++)
    ret[i] = QPDFObjectHandle::newStream(&pdf);

  // Strip stream dictionary
  std::map<std::string,QPDFObjectHandle> dict;

  dict["/Type"] = QPDFObjectHandle::newName("/XObject");
  dict["/Subtype"] = QPDFObjectHandle::newName("/Image");
  dict["/Width"] = QPDFObjectHandle::newInteger(width);
  dict["/BitsPerComponent"] = QPDFObjectHandle::newInteger(bpc);

  J_COLOR_SPACE color_space;
  unsigned components;
  // Write "/ColorSpace" dictionary based on raster input
  switch(cs)
  {
    case CUPS_CSPACE_K:
    case CUPS_CSPACE_SW:
        dict["/ColorSpace"] = QPDFObjectHandle::newName("/DeviceGray");
        color_space = JCS_GRAYSCALE;
        components = 1;
        break;
    case CUPS_CSPACE_RGB:
    case CUPS_CSPACE_SRGB:
    case CUPS_CSPACE_ADOBERGB:
        dict["/ColorSpace"] = QPDFObjectHandle::newName("/DeviceRGB");
        color_space = JCS_RGB;
        components = 3;
        break;
    default:
        if (doc->logfunc)
	  doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		       "cfFilterPWGToPDF: Color space not supported.");
        return (std::vector<QPDFObjectHandle>(num_strips, QPDFObjectHandle()));
  }

  //
  // We deliver already compressed content (instead of letting QPDFWriter
  // do it) to avoid using excessive memory. For that we first get preferred
  // compression method to pre-compress content for strip streams.
  //
  // Use the compression method with highest priority of the available methods
  // __________________
  // Priority | Method
  // ------------------
  // 0        | DCT
  // 1        | FLATE
  // 2        | RLE
  // ------------------
  //

  compression_method_t compression = compression_methods.front();
  for (std::vector<compression_method_t>::iterator it =
	 compression_methods.begin();
       it != compression_methods.end(); ++it)
    compression = compression > *it ? compression : *it;

  // write compressed stream data
  for (size_t i = 0; i < num_strips; i ++)
  {
    dict["/Height"] = QPDFObjectHandle::newInteger(strip_height[i]);
    ret[i].replaceDict(QPDFObjectHandle::newDictionary(dict));
    Pl_Buffer psink("psink");
    if (compression == FLATE_DECODE)
    {
      Pl_Flate pflate("pflate", &psink, Pl_Flate::a_deflate);
      pflate.write(strip_data[i]->getBuffer(), strip_data[i]->getSize());
      pflate.finish();
      ret[i].replaceStreamData(std::shared_ptr<Buffer>(psink.getBuffer()),
			       QPDFObjectHandle::newName("/FlateDecode"),
			       QPDFObjectHandle::newNull());
    }
    else if (compression == RLE_DECODE)
    {
      Pl_RunLength prle("prle", &psink, Pl_RunLength::a_encode);
      prle.write(strip_data[i]->getBuffer(), strip_data[i]->getSize());
      prle.finish();
      ret[i].replaceStreamData(std::shared_ptr<Buffer>(psink.getBuffer()),
			       QPDFObjectHandle::newName("/RunLengthDecode"),
			       QPDFObjectHandle::newNull());
    }
    else if (compression == DCT_DECODE)
    {
      Pl_DCT pdct("pdct", &psink, width, strip_height[i], components,
		  color_space);
      pdct.write(strip_data[i]->getBuffer(), strip_data[i]->getSize());
      pdct.finish();
      ret[i].replaceStreamData(std::shared_ptr<Buffer>(psink.getBuffer()),
			       QPDFObjectHandle::newName("/DCTDecode"),
			       QPDFObjectHandle::newNull());
    }
  }
  return (ret);
}


static QPDFObjectHandle
make_image(QPDF &pdf,
	   std::shared_ptr<Buffer> page_data,
	   unsigned width,
	   unsigned height,
	   std::string render_intent,
	   cups_cspace_t cs,
	   unsigned bpc,
	   pwgtopdf_doc_t *doc)
{
  QPDFObjectHandle ret = QPDFObjectHandle::newStream(&pdf);

  QPDFObjectHandle icc_ref;

  int use_blackpoint = 0;
  std::map<std::string,QPDFObjectHandle> dict;

  dict["/Type"] = QPDFObjectHandle::newName("/XObject");
  dict["/Subtype"] = QPDFObjectHandle::newName("/Image");
  dict["/Width"] = QPDFObjectHandle::newInteger(width);
  dict["/Height"] = QPDFObjectHandle::newInteger(height);
  dict["/BitsPerComponent"] = QPDFObjectHandle::newInteger(bpc);

  if (!doc->cm_disabled)
  {
    // Write rendering intent into the PDF based on raster settings
    if (render_intent == "Perceptual")
      dict["/Intent"] = QPDFObjectHandle::newName("/Perceptual");
    else if (render_intent == "Absolute")
      dict["/Intent"] = QPDFObjectHandle::newName("/AbsoluteColorimetric");
    else if (render_intent == "Relative")
      dict["/Intent"] = QPDFObjectHandle::newName("/RelativeColorimetric");
    else if (render_intent == "Saturation")
      dict["/Intent"] = QPDFObjectHandle::newName("/Saturation");
    else if (render_intent == "RelativeBpc")
    {
      // Enable blackpoint compensation
      dict["/Intent"] = QPDFObjectHandle::newName("/RelativeColorimetric");
      use_blackpoint = 1;
    }
  }

  // Write "/ColorSpace" dictionary based on raster input
  if (doc->colorProfile != NULL && !doc->cm_disabled)
  {
    icc_ref = embed_icc_profile(pdf, doc);

    if (!icc_ref.isNull())
      dict["/ColorSpace"] = icc_ref;
  }
  else if (!doc->cm_disabled)
  {
    switch (cs)
    {
      case CUPS_CSPACE_DEVICE1:
      case CUPS_CSPACE_DEVICE2:
      case CUPS_CSPACE_DEVICE3:
      case CUPS_CSPACE_DEVICE4:
      case CUPS_CSPACE_DEVICE5:
      case CUPS_CSPACE_DEVICE6:
      case CUPS_CSPACE_DEVICE7:
      case CUPS_CSPACE_DEVICE8:
      case CUPS_CSPACE_DEVICE9:
      case CUPS_CSPACE_DEVICEA:
      case CUPS_CSPACE_DEVICEB:
      case CUPS_CSPACE_DEVICEC:
      case CUPS_CSPACE_DEVICED:
      case CUPS_CSPACE_DEVICEE:
      case CUPS_CSPACE_DEVICEF:
	  // For right now, DeviceN will use /DeviceCMYK in the PDF
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceCMYK");
	  break;
      case CUPS_CSPACE_K:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceGray");
	  break;
      case CUPS_CSPACE_SW:
	  if (use_blackpoint)
	    dict["/ColorSpace"]=get_cal_gray_array(cfCmWhitePointSGray(),
						   cfCmGammaSGray(), 
						   cfCmBlackPointDefault());
	  else
	    dict["/ColorSpace"]=get_cal_gray_array(cfCmWhitePointSGray(),
						   cfCmGammaSGray(), 0);
	  break;
      case CUPS_CSPACE_CMYK:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceCMYK");
	  break;
      case CUPS_CSPACE_RGB:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceRGB");
	  break;
      case CUPS_CSPACE_SRGB:
	  icc_ref = embed_srgb_profile(pdf, doc);
	  if (!icc_ref.isNull())
	    dict["/ColorSpace"]=icc_ref;
	  else 
	    dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceRGB");
	  break;
      case CUPS_CSPACE_ADOBERGB:
	  if (use_blackpoint)
	    dict["/ColorSpace"]=get_cal_rgb_array(cfCmWhitePointAdobeRGB(),
						  cfCmGammaAdobeRGB(), 
						  cfCmMatrixAdobeRGB(),
						  cfCmBlackPointDefault());
	  else
	    dict["/ColorSpace"]=get_cal_rgb_array(cfCmWhitePointAdobeRGB(), 
						  cfCmGammaAdobeRGB(),
						  cfCmMatrixAdobeRGB(), 0);
	  break;
      default:
	  if (doc->logfunc)
	    doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
			 "cfFilterPWGToPDF: Color space not supported.");
	  return (QPDFObjectHandle());
    }
  }
  else if (doc->cm_disabled)
  {
    switch(cs)
    {
      case CUPS_CSPACE_K:
      case CUPS_CSPACE_SW:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceGray");
	  break;
      case CUPS_CSPACE_RGB:
      case CUPS_CSPACE_SRGB:
      case CUPS_CSPACE_ADOBERGB:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceRGB");
	  break;
      case CUPS_CSPACE_DEVICE1:
      case CUPS_CSPACE_DEVICE2:
      case CUPS_CSPACE_DEVICE3:
      case CUPS_CSPACE_DEVICE4:
      case CUPS_CSPACE_DEVICE5:
      case CUPS_CSPACE_DEVICE6:
      case CUPS_CSPACE_DEVICE7:
      case CUPS_CSPACE_DEVICE8:
      case CUPS_CSPACE_DEVICE9:
      case CUPS_CSPACE_DEVICEA:
      case CUPS_CSPACE_DEVICEB:
      case CUPS_CSPACE_DEVICEC:
      case CUPS_CSPACE_DEVICED:
      case CUPS_CSPACE_DEVICEE:
      case CUPS_CSPACE_DEVICEF:
      case CUPS_CSPACE_CMYK:
	  dict["/ColorSpace"]=QPDFObjectHandle::newName("/DeviceCMYK");
	  break;
      default:
	  if (doc->logfunc)
	    doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
			 "cfFilterPWGToPDF: Color space not supported.");
	  return (QPDFObjectHandle());
    }
  }
  else
    return (QPDFObjectHandle());

  ret.replaceDict(QPDFObjectHandle::newDictionary(dict));

#ifdef PRE_COMPRESS
  // we deliver already compressed content (instead of letting QPDFWriter
  // do it), to avoid using excessive memory
  Pl_Buffer psink("psink");
  Pl_Flate pflate("pflate", &psink, Pl_Flate::a_deflate);

  pflate.write(page_data->getBuffer(), page_data->getSize());
  pflate.finish();

  ret.replaceStreamData(std::shared_ptr<Buffer>(psink.getBuffer()),
			QPDFObjectHandle::newName("/FlateDecode"),
			QPDFObjectHandle::newNull());
#else
  ret.replaceStreamData(page_data, QPDFObjectHandle::newNull(),
			QPDFObjectHandle::newNull());
#endif

  return (ret);
}


static int
finish_page(struct pdf_info *info,
	    pwgtopdf_doc_t *doc)
{
  if (info->outformat == CF_FILTER_OUT_FORMAT_PDF)
  {
    // Finish previous PDF Page
    if (!info->page_data.get())
      return (0);

    QPDFObjectHandle image = make_image(info->pdf, info->page_data,
					info->width, info->height,
					info->render_intent,
					info->color_space, info->bpc, doc);
    if (!image.isInitialized())
    {
      if (doc->logfunc)
	doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		     "cfFilterPWGToPDF: Unable to load image data");
      return (1);
    }

    // add it
    info->page.getKey("/Resources").getKey("/XObject").replaceKey("/I",image);
  }
  else if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
  {
    // Finish previous PCLm page
    if (info->pclm_num_strips == 0)
      return (0);

    for (size_t i = 0; i < info->pclm_strip_data.size(); i ++)
      if (!info->pclm_strip_data[i].get())
	return (0);

    std::vector<QPDFObjectHandle> strips =
      make_pclm_strips(info->pdf, info->pclm_num_strips, info->pclm_strip_data,
		       info->pclm_compression_method_preferred, info->width,
		       info->pclm_strip_height, info->color_space, info->bpc,
		       doc);
    for (size_t i = 0; i < info->pclm_num_strips; i ++)
      if (!strips[i].isInitialized())
      {
	if (doc->logfunc)
	  doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		       "cfFilterPWGToPDF: Unable to load strip data");
	return (1);
      }

    // Add it
    for (size_t i = 0; i < info->pclm_num_strips; i ++)
      info->page.getKey("/Resources").getKey("/XObject")
	.replaceKey("/Image" +
		    int_to_fwstring(i, num_digits(info->pclm_num_strips - 1)),
		    strips[i]);
  }

  // Draw it
  std::string content;
  if (info->outformat == CF_FILTER_OUT_FORMAT_PDF)
  {
    content.append(QUtil::double_to_string(info->page_width) + " 0 0 " +
		   QUtil::double_to_string(info->page_height) + " 0 0 cm\n");
    content.append("/I Do\n");
  }
  else if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
  {
    std::string res = info->pclm_source_resolution_default;

    // resolution is in dpi, so remove the last three characters from
    // resolution string to get resolution integer
    unsigned resolution_integer = std::stoi(res.substr(0, res.size() - 3));
    double d = (double)DEFAULT_PDF_UNIT / resolution_integer;
    content.append(QUtil::double_to_string(d) + " 0 0 " +
		   QUtil::double_to_string(d) + " 0 0 cm\n");
    unsigned yAnchor = info->height;
    for (unsigned i = 0; i < info->pclm_num_strips; i ++)
    {
      yAnchor -= info->pclm_strip_height[i];
      content.append("/P <</MCID 0>> BDC q\n");
      content.append(QUtil::int_to_string(info->width) + " 0 0 " +
		     QUtil::int_to_string(info->pclm_strip_height[i]) +
		     " 0 " + QUtil::int_to_string(yAnchor) + " cm\n");
      content.append("/Image" +
		     int_to_fwstring(i,
				     num_digits(info->pclm_num_strips - 1)) +
		     " Do Q\n");
    }
  }

  QPDFObjectHandle page_contents = info->page.getKey("/Contents");
  if (info->outformat == CF_FILTER_OUT_FORMAT_PDF)
    page_contents.replaceStreamData(content, QPDFObjectHandle::newNull(),
				    QPDFObjectHandle::newNull());
  else if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
    page_contents.getArrayItem(0).replaceStreamData(content,
						    QPDFObjectHandle::newNull(),
						    QPDFObjectHandle::newNull());

  // bookkeeping
  info->page_data = std::shared_ptr<Buffer>();
  info->pclm_strip_data.clear();

  return (0);
}


//
// Perform modifications to PDF if color space conversions are needed
//

static int
prepare_pdf_page(struct pdf_info *info,
		 unsigned width,
		 unsigned height,
		 unsigned bpl,
		 unsigned bpp,
		 unsigned bpc,
		 std::string render_intent,
		 cups_cspace_t color_space,
		 pwgtopdf_doc_t *doc)
{

#define IMAGE_CMYK_8   (bpp == 32 && bpc == 8)
#define IMAGE_CMYK_16  (bpp == 64 && bpc == 16)
#define IMAGE_RGB_8    (bpp == 24 && bpc == 8)
#define IMAGE_RGB_16   (bpp == 48 && bpc == 16)
#define IMAGE_WHITE_1  (bpp == 1 && bpc == 1)
#define IMAGE_WHITE_8  (bpp == 8 && bpc == 8)
#define IMAGE_WHITE_16 (bpp == 16 && bpc == 16)    

  int error = 0;
  pdf_convert_function fn = convert_pdf_no_conversion;
  cmsColorSpaceSignature css;

  // Register available raster information into the PDF
  info->width = width;
  info->height = height;
  info->line_bytes = bpl;
  info->bpp = bpp;
  info->bpc = bpc;
  info->render_intent = render_intent;
  info->color_space = color_space;
  if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
  {
    info->pclm_num_strips =
      (height / info->pclm_strip_height_preferred) +
      (height % info->pclm_strip_height_preferred ? 1 : 0);
    info->pclm_strip_height.resize(info->pclm_num_strips);
    info->pclm_strip_data.resize(info->pclm_num_strips);
    for (size_t i = 0; i < info->pclm_num_strips; i ++)
    {
      info->pclm_strip_height[i] =
	info->pclm_strip_height_preferred < height ?
	info->pclm_strip_height_preferred : height;
      height -= info->pclm_strip_height[i];
    }
  }

  // Invert grayscale by default
  if (color_space == CUPS_CSPACE_K)
    fn = convert_pdf_invert_colors;

  if (doc->colorProfile != NULL)
  {
    css = cmsGetColorSpace(doc->colorProfile);

    // Convert image and PDF color space to an embedded ICC Profile color
    // space
    switch (css)
    {
      // Convert PDF to Grayscale when using a gray profile
      case cmsSigGrayData:
          if (color_space == CUPS_CSPACE_CMYK)
	    fn = convert_pdf_cmyk_8_to_white_8;
	  else if (color_space == CUPS_CSPACE_RGB) 
	    fn = convert_pdf_rgb_8_to_white_8;
	  else              
	    fn = convert_pdf_invert_colors;
	  info->color_space = CUPS_CSPACE_K;
	  break;
      // Convert PDF to RGB when using an RGB profile
      case cmsSigRgbData:
          if (color_space == CUPS_CSPACE_CMYK) 
	    fn = convert_pdf_cmyk_8_to_rgb_8;
	  else if (color_space == CUPS_CSPACE_K) 
	   fn = convert_pdf_white_8_to_rgb_8;
	  info->color_space = CUPS_CSPACE_RGB;
	  break;
      // Convert PDF to CMYK when using an RGB profile
      case cmsSigCmykData:
          if (color_space == CUPS_CSPACE_RGB)
            fn = convert_pdf_rgb_8_to_cmyk_8;
          else if (color_space == CUPS_CSPACE_K) 
            fn = convert_pdf_white_8_to_cmyk_8;
          info->color_space = CUPS_CSPACE_CMYK;
          break;
      default:
	  if (doc->logfunc)
	    doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
			 "cfFilterPWGToPDF: Unable to convert PDF from profile.");
          doc->colorProfile = NULL;
          error = 1;
    }
  }
  else if (!doc->cm_disabled)
  {
    // Perform conversion of an image color space 
    switch (color_space)
    {
      // Convert image to CMYK
      case CUPS_CSPACE_CMYK:
          if (IMAGE_RGB_8)
	    fn = convert_pdf_rgb_8_to_cmyk_8;  
	  else if (IMAGE_RGB_16)
	    fn = convert_pdf_no_conversion;
	  else if (IMAGE_WHITE_8)
	    fn = convert_pdf_white_8_to_cmyk_8;  
	  else if (IMAGE_WHITE_16) 
	    fn = convert_pdf_no_conversion;
	  break;
      // Convert image to RGB
      case CUPS_CSPACE_ADOBERGB:
      case CUPS_CSPACE_RGB:
      case CUPS_CSPACE_SRGB:
           if (IMAGE_CMYK_8)
             fn = convert_pdf_cmyk_8_to_rgb_8;
           else if (IMAGE_CMYK_16)
             fn = convert_pdf_no_conversion;  
           else if (IMAGE_WHITE_8)
             fn = convert_pdf_white_8_to_rgb_8;
           else if (IMAGE_WHITE_16) 
             fn = convert_pdf_no_conversion;       
           break;
      // Convert image to Grayscale
      case CUPS_CSPACE_SW:
      case CUPS_CSPACE_K:
	  if (IMAGE_CMYK_8)
	    fn = convert_pdf_cmyk_8_to_white_8;
	  else if (IMAGE_CMYK_16)
	    fn = convert_pdf_no_conversion;
	  else if (IMAGE_RGB_8) 
	    fn = convert_pdf_rgb_8_to_white_8;
	  else if (IMAGE_RGB_16) 
	    fn = convert_pdf_no_conversion;
	  break;    
      case CUPS_CSPACE_DEVICE1:
      case CUPS_CSPACE_DEVICE2:
      case CUPS_CSPACE_DEVICE3:
      case CUPS_CSPACE_DEVICE4:
      case CUPS_CSPACE_DEVICE5:
      case CUPS_CSPACE_DEVICE6:
      case CUPS_CSPACE_DEVICE7:
      case CUPS_CSPACE_DEVICE8:
      case CUPS_CSPACE_DEVICE9:
      case CUPS_CSPACE_DEVICEA:
      case CUPS_CSPACE_DEVICEB:
      case CUPS_CSPACE_DEVICEC:
      case CUPS_CSPACE_DEVICED:
      case CUPS_CSPACE_DEVICEE:
      case CUPS_CSPACE_DEVICEF:
          // No conversion for right now
	  fn = convert_pdf_no_conversion;
	  break;
      default:
	  if (doc->logfunc)
	    doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
			 "cfFilterPWGToPDF: Color space not supported.");
	  error = 1;
	  break;
    }
  }

  if (!error)
    fn(info, doc);

  return (error);
}


static int
add_pdf_page(struct pdf_info *info,
	     int pagen,
	     unsigned width,
	     unsigned height,
	     int bpp,
	     int bpc,
	     int bpl,
	     std::string render_intent,
	     cups_cspace_t color_space,
	     unsigned xdpi,
	     unsigned ydpi,
	     pwgtopdf_doc_t *doc)
{
  try
  {
    if (finish_page(info, doc)) // any active
      return (1);

    prepare_pdf_page(info, width, height, bpl, bpp, 
		     bpc, render_intent, color_space, doc);

    if (info->height > (std::numeric_limits<unsigned>::max() /
			info->line_bytes))
    {
      if (doc->logfunc)
	doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		     "cfFilterPWGToPDF: Page too big");
      return (1);
    }
    if (info->outformat == CF_FILTER_OUT_FORMAT_PDF)
      info->page_data =
	std::shared_ptr<Buffer>(new Buffer(info->line_bytes * info->height));
    else if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
    {
      // reserve space for PCLm strips
      for (size_t i = 0; i < info->pclm_num_strips; i ++)
	info->pclm_strip_data[i] =
	  std::shared_ptr<Buffer>(new Buffer(info->line_bytes *
					   info->pclm_strip_height[i]));
    }

    QPDFObjectHandle page = QPDFObjectHandle::parse(
	    "<<"
            "  /Type /Page"
            "  /Resources <<"
            "    /XObject << >> "
            "  >>"
            "  /MediaBox null "
            "  /Contents null "
            ">>");

    // Convert to pdf units
    info->page_width = ((double)info->width / xdpi) * DEFAULT_PDF_UNIT;
    info->page_height = ((double)info->height / ydpi) * DEFAULT_PDF_UNIT;
    if (info->outformat == CF_FILTER_OUT_FORMAT_PDF)
    {
      page.replaceKey("/Contents", QPDFObjectHandle::newStream(&info->pdf));
      // data will be provided later
      page.replaceKey("/MediaBox", make_real_box(0, 0, info->page_width,
						 info->page_height));
    }
    else if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
    {
      page.replaceKey("/Contents",
		      QPDFObjectHandle::newArray(std::vector<QPDFObjectHandle>
						 (1, QPDFObjectHandle::newStream
						  (&info->pdf))));

      // box with dimensions rounded off to the nearest integer
      page.replaceKey("/MediaBox",
		      make_integer_box(0, 0, info->page_width + 0.5,
				       info->page_height + 0.5));
    }

    info->page = info->pdf.makeIndirectObject(page); // we want to keep a
                                                     // reference
    info->pdf.addPage(info->page, false);
  }
  catch (std::bad_alloc &ex)
  {
    if (doc->logfunc)
      doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Unable to allocate page data");
    return (1);
  }
  catch (...)
  {
    return (1);
  }

  return (0);
}


static int
close_pdf_file(struct pdf_info * info,
	       pwgtopdf_doc_t *doc)
{
  try
  {
    if (finish_page(info, doc)) // any active
      return (1);
    QPDFWriter output(info->pdf, NULL);
    output.setOutputFile("pdf", doc->outputfp, false);
    //output.setMinimumPDFVersion("1.4");
    if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
      output.setPCLm(true);
    output.write();
  }
  catch (...)
  {
    return (1);
  }

  return (0);
}


static void
pdf_set_line(struct pdf_info * info,
	     unsigned line_n,
	     unsigned char *line,
	     pwgtopdf_doc_t *doc)
{
  if (line_n > info->height)
  {
    if (doc->logfunc)
      doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Bad line %d", line_n);
    return;
  }

  if (info->outformat == CF_FILTER_OUT_FORMAT_PCLM)
  {
    // copy line data into appropriate pclm strip
    size_t strip_num = line_n / info->pclm_strip_height_preferred;
    unsigned line_strip = line_n -
      strip_num * info->pclm_strip_height_preferred;
    memcpy(((info->pclm_strip_data[strip_num])->getBuffer() +
	    (line_strip*info->line_bytes)), line, info->line_bytes);
  }
  else
    memcpy((info->page_data->getBuffer() + (line_n * info->line_bytes)),
	   line, info->line_bytes);
}


static int
convert_raster(cups_raster_t *ras,
	       unsigned width,
	       unsigned height,
	       int bpp,
	       int bpl,
	       struct pdf_info *info,
	       pwgtopdf_doc_t *doc)
{
  // We should be at raster start
  int i;
  unsigned cur_line = 0;
  unsigned char *PixelBuffer, *ptr = NULL, *buff;

  PixelBuffer = (unsigned char *)malloc(bpl);
  buff = (unsigned char *)malloc(info->line_bytes);

  do
  {
    // Read raster data...
    cupsRasterReadPixels(ras, PixelBuffer, bpl);

#if !ARCH_IS_BIG_ENDIAN
    if (info->bpc == 16)
    {
      // Swap byte pairs for endianess (cupsRasterReadPixels() switches
      // from Big Endian back to the system's Endian)
      for (i = bpl, ptr = PixelBuffer; i > 0; i -= 2, ptr += 2)
      {
	unsigned char swap = *ptr;
	*ptr = *(ptr + 1);
	*(ptr + 1) = swap;
      }
    }
#endif // !ARCH_IS_BIG_ENDIAN

    // perform bit operations if necessary
    doc->bit_function(PixelBuffer, ptr,  bpl);

    // write lines and color convert when necessary
    pdf_set_line(info, cur_line, doc->conversion_function(PixelBuffer,
							  buff, width),
		 doc);
    ++cur_line;
  }
  while (cur_line < height);

  free(buff);
  free(PixelBuffer);

  return (0);
}


static int
set_profile(const char *path,
	    pwgtopdf_doc_t *doc)
{
  if (path != NULL)
    doc->colorProfile = cmsOpenProfileFromFile(path, "r");

  if (doc->colorProfile != NULL)
  {
    if (doc->logfunc)
      doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Load profile successful.");
    return (0);
  }
  else
  {
    if (doc->logfunc)
      doc->logfunc(doc->logdata, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Unable to load profile.");
    return (1);
  }
}


int                            // O - Error status
cfFilterPWGToPDF(int inputfd,  // I - File descriptor input stream
       int outputfd,           // I - File descriptor output stream
       int inputseekable,      // I - Is input stream seekable? (unused)
       cf_filter_data_t *data, // I - Job and printer data
       void *parameters)       // I - Filter-specific parameters (outformat)
{
  cups_len_t i;
  char *t;
  pwgtopdf_doc_t	doc;		// Document information
  FILE          	*outputfp;      // Output data stream
  cf_filter_out_format_t outformat;     // Output format
  int			Page, empty = 1;
  cf_cm_calibration_t	cm_calibrate;   // Status of CUPS color management
					// ("on" or "off")
  struct pdf_info pdf;
  cups_raster_t		*ras;		// Raster stream for printing
  cups_page_header_t	header;		// Page header from file
  ipp_t *printer_attrs = data->printer_attrs; // Printer attributes from
					// printer data
  ipp_attribute_t	*ipp_attr;	// Printer attribute
  const char		*profile_name = NULL; // IPP Profile Name
  cf_logfunc_t		log = data->logfunc;
  void			*ld = data->logdata;
  cf_filter_iscanceledfunc_t iscanceled = data->iscanceledfunc;
  void			*icd = data->iscanceleddata;
  int			total_attrs;
  char			buf[1024];
  const char		*kw;
  int			ret = -1;	// Return value


  (void)inputseekable;

  if (parameters)
  {
    outformat = *(cf_filter_out_format_t *)parameters;
    if (outformat != CF_FILTER_OUT_FORMAT_PCLM)
      outformat = CF_FILTER_OUT_FORMAT_PDF;
  }
  else
  {
    t = data->final_content_type;
    if (t)
    {
      if (strcasestr(t, "pclm"))
	outformat = CF_FILTER_OUT_FORMAT_PCLM;
      else if (strcasestr(t, "pdf"))
	outformat = CF_FILTER_OUT_FORMAT_PDF;
      else
	outformat = CF_FILTER_OUT_FORMAT_PDF;
    }
    else
      outformat = CF_FILTER_OUT_FORMAT_PDF;
  }

  if (log) log(ld, CF_LOGLEVEL_DEBUG,
	       "cfFilterPWGToPDF: OUTFORMAT=\"%s\"",
	       outformat == CF_FILTER_OUT_FORMAT_PDF ? "PDF" : "PCLM");

  //
  // Open the output data stream specified by the outputfd...
  //

  if ((outputfp = fdopen(outputfd, "w")) == NULL)
  {
    if (!iscanceled || !iscanceled(icd))
    {
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Unable to open output data stream.");
    }

    return (1);
  }

  doc.outputfp = outputfp;
  // Logging function
  doc.logfunc = log;
  doc.logdata = ld;
  // Job-is-canceled function
  doc.iscanceledfunc = iscanceled;
  doc.iscanceleddata = icd;

  // support the CUPS "cm-calibration" option
  cm_calibrate = cfCmGetCupsColorCalibrateMode(data);

  if (outformat == CF_FILTER_OUT_FORMAT_PCLM ||
      cm_calibrate == CF_CM_CALIBRATION_ENABLED)
    doc.cm_disabled = 1;
  else
    doc.cm_disabled = cfCmIsPrinterCmDisabled(data);

  if (outformat == CF_FILTER_OUT_FORMAT_PCLM && printer_attrs == NULL)
  {
    if (log) log(ld, CF_LOGLEVEL_ERROR,
      "cfFilterPWGToPDF: PCLm output: No printer IPP attributes are supplied, PCLm output not possible.");
    fclose(outputfp);
    return (1);
  }

  // Transform
  ras = cupsRasterOpen(inputfd, CUPS_RASTER_READ);

  // Process pages as needed...
  Page = 0;

  // Get PCLm parameters from printer IPP attributes
  if (outformat == CF_FILTER_OUT_FORMAT_PCLM)
  {
    if (log)
    {
      log(ld, CF_LOGLEVEL_DEBUG, "PCLm-related printer IPP attributes:");
      total_attrs = 0;
      ipp_attr = ippGetFirstAttribute(printer_attrs);
      while (ipp_attr)
      {
        if (strncmp(ippGetName(ipp_attr), "pclm-", 5) == 0)
        {
          total_attrs ++;
          ippAttributeString(ipp_attr, buf, sizeof(buf));
          log(ld, CF_LOGLEVEL_DEBUG, "  Attr: %s",ippGetName(ipp_attr));
          log(ld, CF_LOGLEVEL_DEBUG, "  Value: %s", buf);
          for (i = 0; i < ippGetCount(ipp_attr); i ++)
            if ((kw = ippGetString(ipp_attr, i, NULL)) != NULL)
	      log(ld, CF_LOGLEVEL_DEBUG, "  Keyword: %s", kw);
	}
	ipp_attr = ippGetNextAttribute(printer_attrs);
      }
      log(ld, CF_LOGLEVEL_DEBUG, "  %d attributes", total_attrs);
    }

    char *attr_name = (char *)"pclm-strip-height-preferred";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		  "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" with value %d",
		  attr_name, ippGetInteger(ipp_attr, 0));
      pdf.pclm_strip_height_preferred = ippGetInteger(ipp_attr, 0);
    }
    else
      pdf.pclm_strip_height_preferred = 16; // default strip height

    attr_name = (char *)"pclm-strip-height-supported";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\"",
		   attr_name);
      pdf.pclm_strip_height_supported.clear();  // remove default value = 16
      for (i = 0; i < ippGetCount(ipp_attr); i ++)
        pdf.pclm_strip_height_supported.push_back(ippGetInteger(ipp_attr, i));
    }

    attr_name = (char *)"pclm-raster-back-side";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" with value \"%s\"",
		   attr_name, ippGetString(ipp_attr, 0, NULL));
      pdf.pclm_raster_back_side = ippGetString(ipp_attr, 0, NULL);
    }

    attr_name = (char *)"pclm-source-resolution-supported";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      ippAttributeString(ipp_attr, buf, sizeof(buf));
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" with value \"%s\"",
		   attr_name, buf);
      pdf.pclm_source_resolution_supported = split_strings(buf, ",");
    }

    attr_name = (char *)"pclm-source-resolution-default";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      ippAttributeString(ipp_attr, buf, sizeof(buf));
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" with value \"%s\"",
		   attr_name, buf);
      pdf.pclm_source_resolution_default = buf;
    }
    else if (pdf.pclm_source_resolution_supported.size() > 0)
    {
      pdf.pclm_source_resolution_default =
	pdf.pclm_source_resolution_supported[0];
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" missing, taking first item of \"pclm-source-resolution-supported\" as default resolution",
		   attr_name);
    }
    else
    {
      if (log) log(ld, CF_LOGLEVEL_ERROR,
		   "cfFilterPWGToPDF: PCLm output: Printer IPP attributes do not contain printer resolution information for PCLm.");
      ret = 1;
      goto error;
    }

    attr_name = (char *)"pclm-compression-method-preferred";
    if ((ipp_attr = ippFindAttribute(printer_attrs, attr_name,
				     IPP_TAG_ZERO)) != NULL)
    {
      ippAttributeString(ipp_attr, buf, sizeof(buf));
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Printer PCLm attribute \"%s\" with value \"%s\"",
		   attr_name, buf);
      std::vector<std::string> vec = split_strings(buf, ",");

      // get all compression methods supported by the printer
      for (std::vector<std::string>::iterator it = vec.begin();
	   it != vec.end(); ++it)
      {
        std::string compression_method = *it;
        for (char& x: compression_method)
          x = tolower(x);
        if (compression_method == "flate")
          pdf.pclm_compression_method_preferred.push_back(FLATE_DECODE);
        else if (compression_method == "rle")
          pdf.pclm_compression_method_preferred.push_back(RLE_DECODE);
        else if (compression_method == "jpeg")
          pdf.pclm_compression_method_preferred.push_back(DCT_DECODE);
      }
    }
    // If the compression methods is none of the above or is erreneous
    // use FLATE as compression method and show a warning.
    if (pdf.pclm_compression_method_preferred.empty())
    {
      if (log) log(ld, CF_LOGLEVEL_WARN,
		   "(pwgtopclm) Unable parse Printer attribute \"%s\". "
		   "Using FLATE for encoding image streams.", attr_name);
      pdf.pclm_compression_method_preferred.push_back(FLATE_DECODE);
    }
  }

  while (cupsRasterReadHeader(ras, &header))
  {
    if (iscanceled && iscanceled(icd))
    {
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: Job canceled");
      break;
    }

    if (empty)
    {
      empty = 0;
      // We have a valid input page, so create PDF file
      if (create_pdf_file(&pdf, outformat) != 0)
      {
	if (log) log(ld, CF_LOGLEVEL_ERROR,
		     "cfFilterPWGToPDF: Unable to create PDF file");
	ret = 1;
	goto error;
      }
    }

    // Write a status message with the page number
    Page ++;
    if (log) log(ld, CF_LOGLEVEL_INFO,
		 "cfFilterPWGToPDF: Starting page %d.", Page);

    // Update rendering intent with user settings or the default
    cfGetPrintRenderIntent(data, header.cupsRenderingIntent,
			   sizeof(header.cupsRenderingIntent));

    // Use "profile=profile_name.icc" to embed 'profile_name.icc' into the PDF
    // for testing. Forces color management to enable.
    if (outformat == CF_FILTER_OUT_FORMAT_PDF &&
        (profile_name = cupsGetOption("profile", data->num_options,
				      data->options)) != NULL)
    {
      set_profile(profile_name, &doc);
      doc.cm_disabled = 0;
    }
    if (doc.colorProfile != NULL)
      if (log) log(ld, CF_LOGLEVEL_DEBUG,
		   "cfFilterPWGToPDF: TEST ICC Profile specified (color "
		   "management forced ON): \n[%s]", profile_name);

    // Add a new page to PDF file
    if (add_pdf_page(&pdf, Page, header.cupsWidth, header.cupsHeight,
		     header.cupsBitsPerPixel, header.cupsBitsPerColor, 
		     header.cupsBytesPerLine, header.cupsRenderingIntent, 
		     header.cupsColorSpace, header.HWResolution[0],
		     header.HWResolution[1], &doc) != 0)
    {
      if (log) log(ld, CF_LOGLEVEL_ERROR,
		    "cfFilterPWGToPDF: Unable to start new PDF page");
      ret = 1;
      goto error;
    }

    // Write the bit map into the PDF file
    if (convert_raster(ras, header.cupsWidth, header.cupsHeight,
		       header.cupsBitsPerPixel, header.cupsBytesPerLine, 
		       &pdf, &doc) != 0)
    {
      if (log) log(ld, CF_LOGLEVEL_ERROR,
		   "cfFilterPWGToPDF: Failed to convert page bitmap");
      ret = 1;
      goto error;
    }
  }

  if (empty)
  {
    if (log) log(ld, CF_LOGLEVEL_DEBUG,
		 "cfFilterPWGToPDF: Input is empty, outputting empty file.");
    ret = 0;
    goto error;
  }

  close_pdf_file(&pdf, &doc); // output to outputfp

  if (doc.colorProfile != NULL)
    cmsCloseProfile(doc.colorProfile);

  cupsRasterClose(ras);
  fclose(outputfp);

  return (Page == 0);

error:
  cupsRasterClose(ras);
  fclose(outputfp);

  return (ret);
}