/*
 * EPSON ESC/P and ESC/P2 filter for CUPS.
 *
 * Copyright 2007-2018 by Apple Inc.
 * Copyright 1993-2007 by Easy Software Products.
 *
 * Licensed under Apache License v2.0.  See the file "LICENSE" for more
 * information.
 */

/*
 * Include necessary headers...
 */

#include <cups/cups.h>
#include <cups/ppd.h>
#include <cups/string-private.h>
#include <cups/language-private.h>
#include <cups/raster.h>
#include <unistd.h>
#include <fcntl.h>
#include <signal.h>


/*
 * Model numbers...
 */

#define EPSON_9PIN	0
#define EPSON_24PIN	1
#define EPSON_COLOR	2
#define EPSON_PHOTO	3
#define EPSON_ICOLOR	4
#define EPSON_IPHOTO	5


/*
 * Macros...
 */

#define pwrite(s,n) fwrite((s), 1, (n), stdout)


/*
 * Globals...
 */

unsigned char	*Planes[6],		/* Output buffers */
		*CompBuffer,		/* Compression buffer */
		*LineBuffers[2];	/* Line bitmap buffers */
int		Model,			/* Model number */
		EjectPage,		/* Eject the page when done? */
		Shingling,		/* Shingle output? */
		Canceled;		/* Has the current job been canceled? */
unsigned	NumPlanes,		/* Number of color planes */
		Feed,			/* Number of lines to skip */
		DotBit,			/* Bit in buffers */
		DotBytes,		/* # bytes in a dot column */
		DotColumns,		/* # columns in 1/60 inch */
		LineCount,		/* # of lines processed */
		EvenOffset,		/* Offset into 'even' buffers */
		OddOffset;		/* Offset into 'odd' buffers */


/*
 * Prototypes...
 */

void	Setup(void);
void	StartPage(const ppd_file_t *ppd, const cups_page_header2_t *header);
void	EndPage(const cups_page_header2_t *header);
void	Shutdown(void);

void	CancelJob(int sig);
void	CompressData(const unsigned char *line, unsigned length, unsigned plane,
	             unsigned type, unsigned xstep, unsigned ystep);
void	OutputLine(const cups_page_header2_t *header);
void	OutputRows(const cups_page_header2_t *header, int row);


/*
 * 'Setup()' - Prepare the printer for printing.
 */

void
Setup(void)
{
  const char	*device_uri;		/* The device for the printer... */


 /*
  * EPSON USB printers need an additional command issued at the
  * beginning of each job to exit from "packet" mode...
  */

  if ((device_uri = getenv("DEVICE_URI")) != NULL &&
      strncmp(device_uri, "usb:", 4) == 0 && Model >= EPSON_ICOLOR)
    pwrite("\000\000\000\033\001@EJL 1284.4\n@EJL     \n\033@", 29);
}


/*
 * 'StartPage()' - Start a page of graphics.
 */

void
StartPage(
    const ppd_file_t         *ppd,	/* I - PPD file */
    const cups_page_header2_t *header)	/* I - Page header */
{
  int		n, t;			/* Numbers */
  unsigned	plane;			/* Looping var */


 /*
  * Show page device dictionary...
  */

  fprintf(stderr, "DEBUG: StartPage...\n");
  fprintf(stderr, "DEBUG: Duplex = %d\n", header->Duplex);
  fprintf(stderr, "DEBUG: HWResolution = [ %d %d ]\n", header->HWResolution[0], header->HWResolution[1]);
  fprintf(stderr, "DEBUG: ImagingBoundingBox = [ %d %d %d %d ]\n", header->ImagingBoundingBox[0], header->ImagingBoundingBox[1], header->ImagingBoundingBox[2], header->ImagingBoundingBox[3]);
  fprintf(stderr, "DEBUG: Margins = [ %d %d ]\n", header->Margins[0], header->Margins[1]);
  fprintf(stderr, "DEBUG: ManualFeed = %d\n", header->ManualFeed);
  fprintf(stderr, "DEBUG: MediaPosition = %d\n", header->MediaPosition);
  fprintf(stderr, "DEBUG: NumCopies = %d\n", header->NumCopies);
  fprintf(stderr, "DEBUG: Orientation = %d\n", header->Orientation);
  fprintf(stderr, "DEBUG: PageSize = [ %d %d ]\n", header->PageSize[0], header->PageSize[1]);
  fprintf(stderr, "DEBUG: cupsWidth = %d\n", header->cupsWidth);
  fprintf(stderr, "DEBUG: cupsHeight = %d\n", header->cupsHeight);
  fprintf(stderr, "DEBUG: cupsMediaType = %d\n", header->cupsMediaType);
  fprintf(stderr, "DEBUG: cupsBitsPerColor = %d\n", header->cupsBitsPerColor);
  fprintf(stderr, "DEBUG: cupsBitsPerPixel = %d\n", header->cupsBitsPerPixel);
  fprintf(stderr, "DEBUG: cupsBytesPerLine = %d\n", header->cupsBytesPerLine);
  fprintf(stderr, "DEBUG: cupsColorOrder = %d\n", header->cupsColorOrder);
  fprintf(stderr, "DEBUG: cupsColorSpace = %d\n", header->cupsColorSpace);
  fprintf(stderr, "DEBUG: cupsCompression = %d\n", header->cupsCompression);

 /*
  * Send a reset sequence.
  */

  if (ppd && ppd->nickname && strstr(ppd->nickname, "OKIDATA") != NULL)
    printf("\033{A");	/* Set EPSON emulation mode */

  printf("\033@");

 /*
  * See which type of printer we are using...
  */

  switch (Model)
  {
    case EPSON_9PIN :
    case EPSON_24PIN :
        printf("\033P\022");		/* Set 10 CPI */

	if (header->HWResolution[0] == 360 || header->HWResolution[0] == 240)
	{
	  printf("\033x1");		/* LQ printing */
	  printf("\033U1");		/* Unidirectional */
	}
	else
	{
	  printf("\033x0");		/* Draft printing */
	  printf("\033U0");		/* Bidirectional */
	}

	printf("\033l%c\033Q%c", 0,	/* Side margins */
                      (int)(10.0 * header->PageSize[0] / 72.0 + 0.5));
	printf("\033\062\033C%c",	/* Page length in 1/6th inches */
		      (int)(header->PageSize[1] / 12.0 + 0.5));
	printf("\033N%c", 0);		/* Bottom margin */
        printf("\033O");		/* No perforation skip */

       /*
	* Setup various buffer limits...
	*/

        DotBytes   = header->cupsRowCount / 8;
	DotColumns = header->HWResolution[0] / 60;
        Shingling  = 0;

        if (Model == EPSON_9PIN)
	  printf("\033\063\030");	/* Set line feed */
	else
	  switch (header->HWResolution[0])
	  {
	    case 60:
	    case 120 :
	    case 240 :
        	printf("\033\063\030");	/* Set line feed */
		break;

	    case 180 :
	    case 360 :
        	Shingling = 1;

        	if (header->HWResolution[1] == 180)
        	  printf("\033\063\010");/* Set line feed */
		else
        	  printf("\033+\010");	/* Set line feed */
        	break;
	  }
        break;

    default :
       /*
	* Set graphics mode...
	*/

	pwrite("\033(G\001\000\001", 6);	/* Graphics mode */

       /*
	* Set the media size...
	*/

        if (Model < EPSON_ICOLOR)
	{
	  pwrite("\033(U\001\000", 5);		/* Resolution/units */
	  putchar((int)(3600 / header->HWResolution[1]));
        }
	else
	{
	  pwrite("\033(U\005\000", 5);
	  putchar((int)(1440 / header->HWResolution[1]));
	  putchar((int)(1440 / header->HWResolution[1]));
	  putchar((int)(1440 / header->HWResolution[0]));
	  putchar(0xa0);	/* n/1440ths... */
	  putchar(0x05);
	}

	n = (int)(header->PageSize[1] * header->HWResolution[1] / 72.0);

	pwrite("\033(C\002\000", 5);		/* Page length */
	putchar(n);
	putchar(n >> 8);

        if (ppd)
	  t = (int)((ppd->sizes[1].length - ppd->sizes[1].top) * header->HWResolution[1] / 72.0);
        else
	  t = 0;

	pwrite("\033(c\004\000", 5);		/* Top & bottom margins */
	putchar(t);
	putchar(t >> 8);
	putchar(n);
	putchar(n >> 8);

	if (header->HWResolution[1] == 720)
	{
	  pwrite("\033(i\001\000\001", 6);	/* Microweave */
	  pwrite("\033(e\002\000\000\001", 7);	/* Small dots */
	}

	pwrite("\033(V\002\000\000\000", 7);	/* Set absolute position 0 */

        DotBytes   = 0;
	DotColumns = 0;
        Shingling  = 0;
        break;
  }

 /*
  * Set other stuff...
  */

  if (header->cupsColorSpace == CUPS_CSPACE_CMY)
    NumPlanes = 3;
  else if (header->cupsColorSpace == CUPS_CSPACE_KCMY)
    NumPlanes = 4;
  else if (header->cupsColorSpace == CUPS_CSPACE_KCMYcm)
    NumPlanes = 6;
  else
    NumPlanes = 1;

  Feed = 0;				/* No blank lines yet */

 /*
  * Allocate memory for a line/row of graphics...
  */

  if ((Planes[0] = malloc(header->cupsBytesPerLine + NumPlanes)) == NULL)
  {
    fputs("ERROR: Unable to allocate memory\n", stderr);
    exit(1);
  }

  for (plane = 1; plane < NumPlanes; plane ++)
    Planes[plane] = Planes[0] + plane * header->cupsBytesPerLine / NumPlanes;

  if (header->cupsCompression || DotBytes)
  {
    if ((CompBuffer = calloc(2, header->cupsWidth + 1)) == NULL)
    {
      fputs("ERROR: Unable to allocate memory\n", stderr);
      exit(1);
    }
  }
  else
    CompBuffer = NULL;

  if (DotBytes)
  {
    if ((LineBuffers[0] = calloc((size_t)DotBytes, (header->cupsWidth + 7) * (size_t)(Shingling + 1))) == NULL)
    {
      fputs("ERROR: Unable to allocate memory\n", stderr);
      exit(1);
    }

    LineBuffers[1] = LineBuffers[0] + DotBytes * header->cupsWidth;
    DotBit         = 128;
    LineCount      = 0;
    EvenOffset     = 0;
    OddOffset      = 0;
  }
}


/*
 * 'EndPage()' - Finish a page of graphics.
 */

void
EndPage(
    const cups_page_header2_t *header)	/* I - Page header */
{
  if (DotBytes && header)
  {
   /*
    * Flush remaining graphics as needed...
    */

    if (!Shingling)
    {
      if (DotBit < 128 || EvenOffset)
        OutputRows(header, 0);
    }
    else if (OddOffset > EvenOffset)
    {
      OutputRows(header, 1);
      OutputRows(header, 0);
    }
    else
    {
      OutputRows(header, 0);
      OutputRows(header, 1);
    }
  }

 /*
  * Eject the current page...
  */

  putchar(12);				/* Form feed */
  fflush(stdout);

 /*
  * Free memory...
  */

  free(Planes[0]);

  if (CompBuffer)
    free(CompBuffer);

  if (DotBytes)
    free(LineBuffers[0]);
}


/*
 * 'Shutdown()' - Shutdown the printer.
 */

void
Shutdown(void)
{
 /*
  * Send a reset sequence.
  */

  printf("\033@");
}


/*
 * 'CancelJob()' - Cancel the current job...
 */

void
CancelJob(int sig)			/* I - Signal */
{
  (void)sig;

  Canceled = 1;
}


/*
 * 'CompressData()' - Compress a line of graphics.
 */

void
CompressData(const unsigned char *line,	/* I - Data to compress */
             unsigned            length,/* I - Number of bytes */
	     unsigned            plane,	/* I - Color plane */
	     unsigned            type,	/* I - Type of compression */
	     unsigned            xstep,	/* I - X resolution */
	     unsigned            ystep)	/* I - Y resolution */
{
  const unsigned char	*line_ptr,	/* Current byte pointer */
        		*line_end,	/* End-of-line byte pointer */
        		*start;		/* Start of compression sequence */
  unsigned char      	*comp_ptr,	/* Pointer into compression buffer */
			temp;		/* Current byte */
  int   	        count;		/* Count of bytes for output */
  static int		ctable[6] = { 0, 2, 1, 4, 18, 17 };
					/* KCMYcm color values */


 /*
  * Setup pointers...
  */

  line_ptr = line;
  line_end = line + length;

 /*
  * Do depletion for 720 DPI printing...
  */

  if (ystep == 5)
  {
    for (comp_ptr = (unsigned char *)line; comp_ptr < line_end;)
    {
     /*
      * Grab the current byte...
      */

      temp = *comp_ptr;

     /*
      * Check adjacent bits...
      */

      if ((temp & 0xc0) == 0xc0)
        temp &= 0xbf;
      if ((temp & 0x60) == 0x60)
        temp &= 0xdf;
      if ((temp & 0x30) == 0x30)
        temp &= 0xef;
      if ((temp & 0x18) == 0x18)
        temp &= 0xf7;
      if ((temp & 0x0c) == 0x0c)
        temp &= 0xfb;
      if ((temp & 0x06) == 0x06)
        temp &= 0xfd;
      if ((temp & 0x03) == 0x03)
        temp &= 0xfe;

      *comp_ptr++ = temp;

     /*
      * Check the last bit in the current byte and the first bit in the
      * next byte...
      */

      if ((temp & 0x01) && comp_ptr < line_end && *comp_ptr & 0x80)
        *comp_ptr &= 0x7f;
    }
  }

  switch (type)
  {
    case 0 :
       /*
	* Do no compression...
	*/
	break;

    case 1 :
       /*
        * Do TIFF pack-bits encoding...
        */

	comp_ptr = CompBuffer;

	while (line_ptr < line_end)
	{
	  if ((line_ptr + 1) >= line_end)
	  {
	   /*
	    * Single byte on the end...
	    */

	    *comp_ptr++ = 0x00;
	    *comp_ptr++ = *line_ptr++;
	  }
	  else if (line_ptr[0] == line_ptr[1])
	  {
	   /*
	    * Repeated sequence...
	    */

	    line_ptr ++;
	    count = 2;

	    while (line_ptr < (line_end - 1) &&
        	   line_ptr[0] == line_ptr[1] &&
        	   count < 127)
	    {
              line_ptr ++;
              count ++;
	    }

	    *comp_ptr++ = (unsigned char)(257 - count);
	    *comp_ptr++ = *line_ptr++;
	  }
	  else
	  {
	   /*
	    * Non-repeated sequence...
	    */

	    start    = line_ptr;
	    line_ptr ++;
	    count    = 1;

	    while (line_ptr < (line_end - 1) &&
        	   line_ptr[0] != line_ptr[1] &&
        	   count < 127)
	    {
              line_ptr ++;
              count ++;
	    }

	    *comp_ptr++ = (unsigned char)(count - 1);

	    memcpy(comp_ptr, start, (size_t)count);
	    comp_ptr += count;
	  }
	}

        line_ptr = CompBuffer;
        line_end = comp_ptr;
	break;
  }

  putchar(0x0d);			/* Move print head to left margin */

  if (Model < EPSON_ICOLOR)
  {
   /*
    * Do graphics the "old" way...
    */

    if (NumPlanes > 1)
    {
     /*
      * Set the color...
      */

      if (plane > 3)
	printf("\033(r%c%c%c%c", 2, 0, 1, ctable[plane] & 15);
					  /* Set extended color */
      else if (NumPlanes == 3)
	printf("\033r%c", ctable[plane + 1]);
					  /* Set color */
      else
	printf("\033r%c", ctable[plane]);	/* Set color */
    }

   /*
    * Send a raster plane...
    */

    length *= 8;
    printf("\033.");			/* Raster graphics */
    putchar((int)type);
    putchar((int)ystep);
    putchar((int)xstep);
    putchar(1);
    putchar((int)length);
    putchar((int)(length >> 8));
  }
  else
  {
   /*
    * Do graphics the "new" way...
    */

    printf("\033i");
    putchar(ctable[plane]);
    putchar((int)type);
    putchar(1);
    putchar((int)length);
    putchar((int)(length >> 8));
    putchar(1);
    putchar(0);
  }

  pwrite(line_ptr, (size_t)(line_end - line_ptr));
  fflush(stdout);
}


/*
 * 'OutputLine()' - Output a line of graphics.
 */

void
OutputLine(
    const cups_page_header2_t *header)	/* I - Page header */
{
  if (header->cupsRowCount)
  {
    unsigned		width;
    unsigned char	*tempptr,
			*evenptr,
			*oddptr;
    unsigned int	x;
    unsigned char	bit;
    const unsigned char	*pixel;
    unsigned char 	*temp;


   /*
    * Collect bitmap data in the line buffers and write after each buffer.
    */

    for (x = header->cupsWidth, bit = 128, pixel = Planes[0],
             temp = CompBuffer;
	 x > 0;
	 x --, temp ++)
    {
      if (*pixel & bit)
        *temp |= DotBit;

      if (bit > 1)
	bit >>= 1;
      else
      {
	bit = 128;
	pixel ++;
      }
    }

    if (DotBit > 1)
      DotBit >>= 1;
    else
    {
     /*
      * Copy the holding buffer to the output buffer, shingling as necessary...
      */

      if (Shingling && LineCount != 0)
      {
       /*
        * Shingle the output...
        */

        if (LineCount & 1)
        {
          evenptr = LineBuffers[1] + OddOffset;
          oddptr  = LineBuffers[0] + EvenOffset + DotBytes;
        }
        else
        {
          evenptr = LineBuffers[0] + EvenOffset;
          oddptr  = LineBuffers[1] + OddOffset + DotBytes;
        }

        for (width = header->cupsWidth, tempptr = CompBuffer;
             width > 1;
             width -= 2, tempptr += 2, oddptr += DotBytes * 2,
	         evenptr += DotBytes * 2)
        {
          evenptr[0] = tempptr[0];
          oddptr[0]  = tempptr[1];
        }

        if (width == 1)
        {
          evenptr[0] = tempptr[0];
          oddptr[0]  = tempptr[1];
        }
      }
      else
      {
       /*
        * Don't shingle the output...
        */

        for (width = header->cupsWidth, tempptr = CompBuffer,
                 evenptr = LineBuffers[0] + EvenOffset;
             width > 0;
             width --, tempptr ++, evenptr += DotBytes)
          *evenptr = tempptr[0];
      }

      if (Shingling && LineCount != 0)
      {
	EvenOffset ++;
	OddOffset ++;

	if (EvenOffset == DotBytes)
	{
	  EvenOffset = 0;
	  OutputRows(header, 0);
	}

	if (OddOffset == DotBytes)
	{
          OddOffset = 0;
	  OutputRows(header, 1);
	}
      }
      else
      {
	EvenOffset ++;

	if (EvenOffset == DotBytes)
	{
          EvenOffset = 0;
	  OutputRows(header, 0);
	}
      }

      DotBit = 128;
      LineCount ++;

      memset(CompBuffer, 0, header->cupsWidth);
    }
  }
  else
  {
    unsigned	plane;		/* Current plane */
    unsigned	bytes;		/* Bytes per plane */
    unsigned	xstep, ystep;	/* X & Y resolutions */

   /*
    * Write a single line of bitmap data as needed...
    */

    xstep = 3600 / header->HWResolution[0];
    ystep = 3600 / header->HWResolution[1];
    bytes = header->cupsBytesPerLine / NumPlanes;

    for (plane = 0; plane < NumPlanes; plane ++)
    {
     /*
      * Skip blank data...
      */

      if (!Planes[plane][0] &&
          memcmp(Planes[plane], Planes[plane] + 1, (size_t)bytes - 1) == 0)
	continue;

     /*
      * Output whitespace as needed...
      */

      if (Feed > 0)
      {
	pwrite("\033(v\002\000", 5);	/* Relative vertical position */
	putchar((int)Feed);
	putchar((int)(Feed >> 8));

	Feed = 0;
      }

      CompressData(Planes[plane], bytes, plane, header->cupsCompression, xstep, ystep);
    }

    Feed ++;
  }
}


/*
 * 'OutputRows()' - Output 8, 24, or 48 rows.
 */

void
OutputRows(
    const cups_page_header2_t *header,	/* I - Page image header */
    int                      row)	/* I - Row number (0 or 1) */
{
  unsigned	i, n,			/* Looping vars */
		dot_count,		/* Number of bytes to print */
                dot_min;		/* Minimum number of bytes */
  unsigned char *dot_ptr,		/* Pointer to print data */
		*ptr;			/* Current data */


  dot_min = DotBytes * DotColumns;

  if (LineBuffers[row][0] != 0 ||
      memcmp(LineBuffers[row], LineBuffers[row] + 1, header->cupsWidth * DotBytes - 1))
  {
   /*
    * Skip leading space...
    */

    i         = 0;
    dot_count = header->cupsWidth * DotBytes;
    dot_ptr   = LineBuffers[row];

    while (dot_count >= dot_min && dot_ptr[0] == 0 &&
           memcmp(dot_ptr, dot_ptr + 1, dot_min - 1) == 0)
    {
      i         ++;
      dot_ptr   += dot_min;
      dot_count -= dot_min;
    }

   /*
    * Skip trailing space...
    */

    while (dot_count >= dot_min && dot_ptr[dot_count - dot_min] == 0 &&
           memcmp(dot_ptr + dot_count - dot_min,
	          dot_ptr + dot_count - dot_min + 1, dot_min - 1) == 0)
      dot_count -= dot_min;

   /*
    * Position print head for printing...
    */

    if (i == 0)
      putchar('\r');
    else
    {
      putchar(0x1b);
      putchar('$');
      putchar((int)(i & 255));
      putchar((int)(i >> 8));
    }

   /*
    * Start bitmap graphics for this line...
    */

    printf("\033*");			/* Select bit image */
    switch (header->HWResolution[0])
    {
      case 60 : /* 60x60/72 DPI gfx */
          putchar(0);
          break;
      case 120 : /* 120x60/72 DPI gfx */
          putchar(1);
          break;
      case 180 : /* 180 DPI gfx */
          putchar(39);
          break;
      case 240 : /* 240x72 DPI gfx */
          putchar(3);
          break;
      case 360 : /* 360x180/360 DPI gfx */
	  if (header->HWResolution[1] == 180)
	  {
            if (Shingling && LineCount != 0)
              putchar(40);		/* 360x180 fast */
            else
              putchar(41);		/* 360x180 slow */
	  }
	  else
          {
	    if (Shingling && LineCount != 0)
              putchar(72);		/* 360x360 fast */
            else
              putchar(73);		/* 360x360 slow */
          }
          break;
    }

    n = dot_count / DotBytes;
    putchar((int)(n & 255));
    putchar((int)(n / 256));

   /*
    * Write the graphics data...
    */

    if (header->HWResolution[0] == 120 ||
        header->HWResolution[0] == 240)
    {
     /*
      * Need to interleave the dots to avoid hosing the print head...
      */

      for (n = dot_count / 2, ptr = dot_ptr; n > 0; n --, ptr += 2)
      {
        putchar(*ptr);
	putchar(0);
      }

      if (dot_count & 1)
        putchar(*ptr);

     /*
      * Move the head back and print the odd bytes...
      */

      if (i == 0)
	putchar('\r');
      else
      {
	putchar(0x1b);
	putchar('$');
	putchar((int)(i & 255));
	putchar((int)(i >> 8));
      }

      if (header->HWResolution[0] == 120)
      	printf("\033*\001");		/* Select bit image */
      else
      	printf("\033*\003");		/* Select bit image */

      n = (unsigned)dot_count / DotBytes;
      putchar((int)(n & 255));
      putchar((int)(n / 256));

      for (n = dot_count / 2, ptr = dot_ptr + 1; n > 0; n --, ptr += 2)
      {
	putchar(0);
        putchar(*ptr);
      }

      if (dot_count & 1)
        putchar(0);
    }
    else
      pwrite(dot_ptr, dot_count);
  }

 /*
  * Feed the paper...
  */

  putchar('\n');

  if (Shingling && row == 1)
  {
    if (header->HWResolution[1] == 360)
      printf("\n\n\n\n");
    else
      printf("\n");
  }

  fflush(stdout);

 /*
  * Clear the buffer...
  */

  memset(LineBuffers[row], 0, header->cupsWidth * DotBytes);
}


/*
 * 'main()' - Main entry and processing of driver.
 */

int					/* O - Exit status */
main(int  argc,				/* I - Number of command-line arguments */
     char *argv[])			/* I - Command-line arguments */
{
  int			fd;		/* File descriptor */
  cups_raster_t		*ras;		/* Raster stream for printing */
  cups_page_header2_t	header;		/* Page header from file */
  ppd_file_t		*ppd;		/* PPD file */
  int			page;		/* Current page */
  unsigned		y;		/* Current line */
#if defined(HAVE_SIGACTION) && !defined(HAVE_SIGSET)
  struct sigaction action;		/* Actions for POSIX signals */
#endif /* HAVE_SIGACTION && !HAVE_SIGSET */


 /*
  * Make sure status messages are not buffered...
  */

  setbuf(stderr, NULL);

 /*
  * Check command-line...
  */

  if (argc < 6 || argc > 7)
  {
   /*
    * We don't have the correct number of arguments; write an error message
    * and return.
    */

    _cupsLangPrintFilter(stderr, "ERROR",
                         _("%s job-id user title copies options [file]"),
                         "rastertoepson");
    return (1);
  }

 /*
  * Open the page stream...
  */

  if (argc == 7)
  {
    if ((fd = open(argv[6], O_RDONLY)) == -1)
    {
      _cupsLangPrintError("ERROR", _("Unable to open raster file"));
      sleep(1);
      return (1);
    }
  }
  else
    fd = 0;

  ras = cupsRasterOpen(fd, CUPS_RASTER_READ);

 /*
  * Register a signal handler to eject the current page if the
  * job is cancelled.
  */

  Canceled = 0;

#ifdef HAVE_SIGSET /* Use System V signals over POSIX to avoid bugs */
  sigset(SIGTERM, CancelJob);
#elif defined(HAVE_SIGACTION)
  memset(&action, 0, sizeof(action));

  sigemptyset(&action.sa_mask);
  action.sa_handler = CancelJob;
  sigaction(SIGTERM, &action, NULL);
#else
  signal(SIGTERM, CancelJob);
#endif /* HAVE_SIGSET */

 /*
  * Initialize the print device...
  */

  ppd = ppdOpenFile(getenv("PPD"));
  if (!ppd)
  {
    ppd_status_t	status;		/* PPD error */
    int			linenum;	/* Line number */

    _cupsLangPrintFilter(stderr, "ERROR",
                         _("The PPD file could not be opened."));

    status = ppdLastError(&linenum);

    fprintf(stderr, "DEBUG: %s on line %d.\n", ppdErrorString(status), linenum);

    return (1);
  }

  Model = ppd->model_number;

  Setup();

 /*
  * Process pages as needed...
  */

  page = 0;

  while (cupsRasterReadHeader2(ras, &header))
  {
   /*
    * Write a status message with the page number and number of copies.
    */

    if (Canceled)
      break;

    page ++;

    fprintf(stderr, "PAGE: %d %d\n", page, header.NumCopies);
    _cupsLangPrintFilter(stderr, "INFO", _("Starting page %d."), page);

   /*
    * Start the page...
    */

    StartPage(ppd, &header);

   /*
    * Loop for each line on the page...
    */

    for (y = 0; y < header.cupsHeight; y ++)
    {
     /*
      * Let the user know how far we have progressed...
      */

      if (Canceled)
	break;

      if ((y & 127) == 0)
      {
        _cupsLangPrintFilter(stderr, "INFO",
	                     _("Printing page %d, %u%% complete."),
			     page, 100 * y / header.cupsHeight);
        fprintf(stderr, "ATTR: job-media-progress=%u\n",
		100 * y / header.cupsHeight);
      }

     /*
      * Read a line of graphics...
      */

      if (cupsRasterReadPixels(ras, Planes[0], header.cupsBytesPerLine) < 1)
        break;

     /*
      * Write it to the printer...
      */

      OutputLine(&header);
    }

   /*
    * Eject the page...
    */

    _cupsLangPrintFilter(stderr, "INFO", _("Finished page %d."), page);

    EndPage(&header);

    if (Canceled)
      break;
  }

 /*
  * Shutdown the printer...
  */

  Shutdown();

  ppdClose(ppd);

 /*
  * Close the raster stream...
  */

  cupsRasterClose(ras);
  if (fd != 0)
    close(fd);

 /*
  * If no pages were printed, send an error message...
  */

  if (page == 0)
  {
    _cupsLangPrintFilter(stderr, "ERROR", _("No pages were found."));
    return (1);
  }
  else
    return (0);
}
