Subversion Repositories planix.SVN

/*

 *	Copyright 1992 Washington State University. All rights reserved.

 *

 * Permission to use, copy, modify, and distribute this software and its

 * documentation for any purpose and without fee is hereby granted.

 * This software is provided "as is" without express or implied warranty.

 */

/* $Id: gdev4693.c,v 1.9 2004/08/04 23:33:29 stefan Exp $*/

/* Driver for the Tektronix 4693d color plotter. */

#include "gdevprn.h"

#define prn_dev ((gx_device_printer *)dev) /* needed in 5.31 et seq */

/* Thanks to Karl Hakimian (hakimian@yoda.eecs.wsu.edu) */

/* for contributing this code to Aladdin Enterprises. */

#define X_DPI 100

#define Y_DPI 100

#define WIDTH_10THS 85

#define HEIGHT_10THS 110

private dev_proc_print_page(t4693d_print_page);

private dev_proc_map_rgb_color(gdev_t4693d_map_rgb_color);

private dev_proc_map_color_rgb(gdev_t4693d_map_color_rgb);

private gx_device_procs t4693d_procs =

	prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close,

		gdev_t4693d_map_rgb_color, gdev_t4693d_map_color_rgb);

#define t4693d_prn_device(name,depth,max_rgb) {prn_device_body( \

	gx_device_printer,t4693d_procs,name, \

	WIDTH_10THS, HEIGHT_10THS, X_DPI, Y_DPI, 0.25, 0.25, 0.25, 0.25, \

	3,depth,max_rgb,max_rgb,max_rgb + 1,max_rgb + 1, \

	t4693d_print_page)}

const gx_device_printer gs_t4693d2_device = t4693d_prn_device("t4693d2",8, 3);

const gx_device_printer gs_t4693d4_device = t4693d_prn_device("t4693d4",16, 15);

const gx_device_printer gs_t4693d8_device = t4693d_prn_device("t4693d8",24, 255);

private gx_color_index

gdev_t4693d_map_rgb_color(gx_device *dev, const gx_color_value cv[])

{

	ushort bitspercolor = prn_dev->color_info.depth / 3;

	ulong max_value = (1 << bitspercolor) - 1;

        gx_color_value r, g, b;

        r = cv[0]; g = cv[1]; b = cv[2];

	if (bitspercolor == 5) {

		bitspercolor--;

		max_value = (1 << bitspercolor) - 1;

	}

	return ((r*max_value/gx_max_color_value) << (bitspercolor*2)) +

		((g*max_value/gx_max_color_value) << bitspercolor) +

		(b*max_value/gx_max_color_value);

}

private int

gdev_t4693d_map_color_rgb(gx_device *dev, gx_color_index color, ushort prgb[3])

{

        ushort bitspercolor = prn_dev->color_info.depth / 3;

	ulong max_value = (1 << bitspercolor) - 1;

	if (bitspercolor == 5) {

		bitspercolor--;

		max_value = (1 << bitspercolor) - 1;

	}

	prgb[0] = (color >> (bitspercolor*2)) * gx_max_color_value / max_value;

	prgb[1] = ((color >> bitspercolor) & max_value) * gx_max_color_value / max_value;

	prgb[2] = (color & max_value) * gx_max_color_value / max_value;

	return(0);

}

private int

t4693d_print_page(gx_device_printer *dev, FILE *ps_stream)

{

	char header[32];

	int depth = prn_dev->color_info.depth;

	int line_size = gdev_mem_bytes_per_scan_line(prn_dev);

	byte *data = (byte *)gs_malloc(dev->memory, line_size, 1, "t4693d_print_page");

	char *p;

	ushort data_size = line_size/prn_dev->width;

	int checksum;

	int lnum;

	int i;

#if !arch_is_big_endian

	byte swap;

#endif

	if (data == 0) return_error(gs_error_VMerror);

	/* build header. */

	p = header;

	*p++ = (char)0x14;	/* Print request */

	*p++ = (char)0xc0|20;	/* Length of header */

	*p++ = (char)0xc0 | ((prn_dev->width >> 6)&0x3f);

	*p++ = (char)0x80 | (prn_dev->width&0x3f);

	*p++ = (char)0xc0 | ((prn_dev->height >> 6)&0x3f);

	*p++ = (char)0x80 | (prn_dev->height&0x3f);

	*p++ = (char)0xc1;	/* Handshake */

	*p++ = (char)0xc0;	/* Get number of prints from printer. */

	*p++ = (char)0xc0;	/* Get pixel shape from printer. */

	*p++ = (char)(depth == 8) ? 0xcb : (depth == 16) ? 0xcc : 0xcd;

	*p++ = (char)0xc1;	/* Pixel-data order 1. */

	*p++ = (char)0xc3;	/* Interpolate to maximum size. */

	*p++ = (char)0xc3;	/* Full color range 1. */

	*p++ = (char)0xc0;	/* Color conversion from printer. */

	*p++ = (char)0xc0;	/* Color manipulation from printer. */

	*p++ = (char)0xc0;	/* B/W inversion from printer. */

	*p++ = (char)0xc3;	/* Portrait mode centered. */

	*p++ = (char)0xc9;	/* Use printer default for media and printing. */

	*p++ = (char)0x95;

	*p++ = (char)0x81;

	for (checksum = 0, i = 0; &header[i] != p; i++)

		checksum += header[i];

	*p++ = ((checksum%128)&0x7f) | 0x80;

	*p = 0x02; /* end of line. */

	/* write header */

	if (fwrite(header,1,22,ps_stream) != 22) {

		errprintf("Could not write header (t4693d).\n");

		gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

		return_error(gs_error_ioerror);

	}

	for (lnum = 0; lnum < prn_dev->height; lnum++) {

		gdev_prn_copy_scan_lines(prn_dev,lnum,data,line_size);

		for (i = 0; i < line_size; i += data_size) {

			switch (depth) {

			case 8:

				data[i] &= 0x3f;

				break;

			case 16:

#if arch_is_big_endian

				data[i] &= 0x0f;

#else

				swap = data[i];

				data[i] = data[i + 1]&0x0f;

				data[i + 1] = swap;

#endif

				break;

			case 24:

				break;

			default:

				errprintf("Bad depth (%d) t4693d.\n",depth);

				gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

				return_error(gs_error_rangecheck);

			}

			if (fwrite(&data[i],1,data_size,ps_stream) != data_size) {

				errprintf("Could not write pixel (t4693d).\n");

				gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

				return_error(gs_error_ioerror);

			}

		}

		if (fputc(0x02,ps_stream) != 0x02) {

			errprintf("Could not write EOL (t4693d).\n");

			gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

			return_error(gs_error_ioerror);

		}

	}

	if (fputc(0x01,ps_stream) != 0x01) {

		errprintf("Could not write EOT (t4693d).\n");

		gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

		return_error(gs_error_ioerror);

	}

	gs_free(dev->memory, data, line_size, 1, "t4693d_print_page");

	return(0);

}