/* Copyright (C) 1989, 1992, 1993, 1996, 1999 Aladdin Enterprises.  All rights reserved.
  
  This software is provided AS-IS with no warranty, either express or
  implied.
  
  This software is distributed under license and may not be copied,
  modified or distributed except as expressly authorized under the terms
  of the license contained in the file LICENSE in this distribution.
  
  For more information about licensing, please refer to
  http://www.ghostscript.com/licensing/. For information on
  commercial licensing, go to http://www.artifex.com/licensing/ or
  contact Artifex Software, Inc., 101 Lucas Valley Road #110,
  San Rafael, CA  94903, U.S.A., +1(415)492-9861.
*/

/* $Id: gdev3852.c,v 1.5 2002/02/21 22:24:51 giles Exp $*/
/* IBM 3852 JetPrinter color ink jet driver for Ghostscript */

/*
This driver program created by Kevin M. Gift <kgift@draper.com> in Sept. 1992.
Modified 3/93 to correct bug in cnt_2prn size.
Modified 3/93 to dimension page back to 8.5, which seems to
   work better than the actual page width of 7.6, ie. it uses
	the full printing width of the printer.
	It was modeled after the V2.4.1 HP Paintjet driver (gdevpjet.c)
Modified by L. Peter Deutsch <ghost@aladdin.com> 1999-01-10 to remove _ss
    modifiers inappropriately copied from other code.
 */

#include "gdevprn.h"
#include "gdevpcl.h"

/* X_DPI and Y_DPI must be the same - use the maximum graphics resolution */
/*   for this printer  */
#define X_DPI 84
#define Y_DPI 84

/* We round up LINE_SIZE to a multiple of 8 bytes */
/* because that's the unit of transposition from pixels to planes. */
/* Should = 96 (KMG) */
#define LINE_SIZE ((X_DPI * 86 / 10 + 63) / 64 * 8)

/* The device descriptor */
private dev_proc_print_page(jetp3852_print_page);
private gx_device_procs jetp3852_procs =
  prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,
    gdev_pcl_3bit_map_rgb_color, gdev_pcl_3bit_map_color_rgb);
const gx_device_printer far_data gs_jetp3852_device =
  prn_device(jetp3852_procs, "jetp3852",
	86,				/* width_10ths, 8.6" (?) */
	110,				/* height_10ths, 11" */
	X_DPI, Y_DPI,
	0.0, 0, 0.0, 0,		/* left, bottom, right, top margins */
	3, jetp3852_print_page);


/* ------ Internal routines ------ */

/* Send the page to the printer.  */
private int
jetp3852_print_page(gx_device_printer *pdev, FILE *prn_stream)
{
#define DATA_SIZE (LINE_SIZE * 8)

   unsigned int cnt_2prn;
	unsigned int count,tempcnt;
	unsigned char vtp,cntc1,cntc2;
	int line_size_color_plane;

	byte data[DATA_SIZE];
 	byte plane_data[LINE_SIZE * 3];

	/* Set initial condition for printer */
	fputs("\033@",prn_stream);

	/* Send each scan line in turn */
	   {	int lnum;
		int line_size = gdev_mem_bytes_per_scan_line((gx_device *)pdev);
		int num_blank_lines = 0;
		for ( lnum = 0; lnum < pdev->height; lnum++ )
		   {	byte *end_data = data + line_size;
			gdev_prn_copy_scan_lines(pdev, lnum,
						 (byte *)data, line_size);
			/* Remove trailing 0s. */
			while ( end_data > data && end_data[-1] == 0 )
				end_data--;
			if ( end_data == data )
			   {	/* Blank line */
				num_blank_lines++;
			   }
			else
			   {	int i;
				byte *odp;
				byte *row;

				/* Pad with 0s to fill out the last */
				/* block of 8 bytes. */
				memset(end_data, 0, 7);

				/* Transpose the data to get pixel planes. */
				for ( i = 0, odp = plane_data; i < DATA_SIZE;
				      i += 8, odp++
				    )
				 { /* The following is for 16-bit machines */
#define spread3(c)\
 { 0, c, c*0x100, c*0x101, c*0x10000L, c*0x10001L, c*0x10100L, c*0x10101L }
				   static ulong spr40[8] = spread3(0x40);
				   static ulong spr8[8] = spread3(8);
				   static ulong spr2[8] = spread3(2);
				   register byte *dp = data + i;
				   register ulong pword =
				     (spr40[dp[0]] << 1) +
				     (spr40[dp[1]]) +
				     (spr40[dp[2]] >> 1) +
				     (spr8[dp[3]] << 1) +
				     (spr8[dp[4]]) +
				     (spr8[dp[5]] >> 1) +
				     (spr2[dp[6]]) +
				     (spr2[dp[7]] >> 1);
				   odp[0] = (byte)(pword >> 16);
				   odp[LINE_SIZE] = (byte)(pword >> 8);
				   odp[LINE_SIZE*2] = (byte)(pword);
				 }
				/* Skip blank lines if any */
				if ( num_blank_lines > 0 )
				   {	
					if (lnum == 0) 
					  { /* Skip down the page from the top */
     					 /* set line spacing = 1/8 inch */
	   				fputs("\0330",prn_stream);
		   			/* Set vertical tab */
		  	   		vtp = (num_blank_lines  / 8);
						fprintf(prn_stream,"\033B%c\000",vtp);
						/* Do vertical tab */
				    	fputs("\013",prn_stream);
				    	num_blank_lines = 0;
						}
					 else
					   { /* Do "dot skips" */
						while(num_blank_lines > 255)
						  {
						  fputs("\033e\377",prn_stream);
						  num_blank_lines -= 255;
						  }
						vtp = num_blank_lines; 
						fprintf(prn_stream,"\033e%c",vtp);
						num_blank_lines = 0;
					 }
				   }

				/* Transfer raster graphics in the order R, G, B. */
				/* Apparently it is stored in B, G, R */
				/* Calculate the amount of data to send by what */
				/* Ghostscript tells us the scan line_size in (bytes) */

				count = line_size / 3;
				line_size_color_plane = count / 3;
			   cnt_2prn = line_size_color_plane * 3 + 5;
				tempcnt = cnt_2prn;
				cntc1 = (tempcnt & 0xFF00) >> 8;
				cntc2 = (tempcnt & 0x00FF);
				fprintf(prn_stream, "\033[O%c%c\200\037",cntc2,cntc1);
				fputc('\000',prn_stream);
   			fputs("\124\124",prn_stream);

				for ( row = plane_data + LINE_SIZE * 2, i = 0; 
				      i < 3; row -= LINE_SIZE, i++ )     
				{	int jj;
				   byte ctemp;
				   odp = row;
					/* Complement bytes */
					for (jj=0; jj< line_size_color_plane; jj++)
					  { ctemp = *odp;
					    *odp++ = ~ctemp;
						 }
					fwrite(row, sizeof(byte),
					    line_size_color_plane, prn_stream);
					}
			   }
		   }
	   }

	/* eject page */
 	fputs("\014", prn_stream);  

	return 0;
}
