ref: 4c583d2f6d739b044385a429eca85e7a2dd8333c
dir: /sys/src/cmd/gs/src/gdev4693.c/
/*
* 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);
}