1 /* 2 * Copyright 1992 Washington State University. All rights reserved. 3 * 4 * Permission to use, copy, modify, and distribute this software and its 5 * documentation for any purpose and without fee is hereby granted. 6 * This software is provided "as is" without express or implied warranty. 7 */ 8 9 /*$Id: gdev4693.c,v 1.3 2001/08/01 00:48:23 stefan911 Exp $*/ 10 /* Driver for the Tektronix 4693d color plotter. */ 11 #include "gdevprn.h" 12 #define prn_dev ((gx_device_printer *)dev) /* needed in 5.31 et seq */ 13 14 /* Thanks to Karl Hakimian (hakimian@yoda.eecs.wsu.edu) */ 15 /* for contributing this code to Aladdin Enterprises. */ 16 17 #define X_DPI 100 18 #define Y_DPI 100 19 #define WIDTH_10THS 85 20 #define HEIGHT_10THS 110 21 22 private dev_proc_print_page(t4693d_print_page); 23 private dev_proc_map_rgb_color(gdev_t4693d_map_rgb_color); 24 private dev_proc_map_color_rgb(gdev_t4693d_map_color_rgb); 25 26 private gx_device_procs t4693d_procs = 27 prn_color_procs(gdev_prn_open, gdev_prn_output_page, gdev_prn_close, 28 gdev_t4693d_map_rgb_color, gdev_t4693d_map_color_rgb); 29 30 #define t4693d_prn_device(name,depth,max_rgb) {prn_device_body( \ 31 gx_device_printer,t4693d_procs,name, \ 32 WIDTH_10THS, HEIGHT_10THS, X_DPI, Y_DPI, 0.25, 0.25, 0.25, 0.25, \ 33 3,depth,max_rgb,max_rgb,max_rgb + 1,max_rgb + 1, \ 34 t4693d_print_page)} 35 36 const gx_device_printer gs_t4693d2_device = t4693d_prn_device("t4693d2",8, 3); 37 const gx_device_printer gs_t4693d4_device = t4693d_prn_device("t4693d4",16, 15); 38 const gx_device_printer gs_t4693d8_device = t4693d_prn_device("t4693d8",24, 255); 39 40 private gx_color_index 41 gdev_t4693d_map_rgb_color(gx_device *dev, 42 gx_color_value r, gx_color_value g, gx_color_value b) 43 { 44 ushort bitspercolor = prn_dev->color_info.depth / 3; 45 ulong max_value = (1 << bitspercolor) - 1; 46 47 if (bitspercolor == 5) { 48 bitspercolor--; 49 max_value = (1 << bitspercolor) - 1; 50 } 51 52 return ((r*max_value/gx_max_color_value) << (bitspercolor*2)) + 53 ((g*max_value/gx_max_color_value) << bitspercolor) + 54 (b*max_value/gx_max_color_value); 55 } 56 57 private int 58 gdev_t4693d_map_color_rgb(gx_device *dev, gx_color_index color, ushort prgb[3]) 59 { 60 gx_color_value gray = color*gx_max_color_value/dev->color_info.max_gray; 61 prgb[0] = gray; 62 prgb[1] = gray; 63 prgb[2] = gray; 64 return(0); 65 } 66 67 private int 68 t4693d_print_page(gx_device_printer *dev, FILE *ps_stream) 69 { 70 char header[32]; 71 int depth = prn_dev->color_info.depth; 72 int line_size = gdev_mem_bytes_per_scan_line(prn_dev); 73 byte *data = (byte *)gs_malloc(line_size, 1, "t4693d_print_page"); 74 char *p; 75 ushort data_size = line_size/prn_dev->width; 76 int checksum; 77 int lnum; 78 int i; 79 #if !arch_is_big_endian 80 byte swap; 81 #endif 82 83 if (data == 0) return_error(gs_error_VMerror); 84 /* build header. */ 85 p = header; 86 *p++ = 0x14; /* Print request */ 87 *p++ = 0xc0|20; /* Length of header */ 88 *p++ = 0xc0 | ((prn_dev->width >> 6)&0x3f); 89 *p++ = 0x80 | (prn_dev->width&0x3f); 90 *p++ = 0xc0 | ((prn_dev->height >> 6)&0x3f); 91 *p++ = 0x80 | (prn_dev->height&0x3f); 92 *p++ = 0xc1; /* Handshake */ 93 *p++ = 0xc0; /* Get number of prints from printer. */ 94 *p++ = 0xc0; /* Get pixel shape from printer. */ 95 *p++ = (depth == 8) ? 0xcb : (depth == 16) ? 0xcc : 0xcd; 96 *p++ = 0xc1; /* Pixel-data order 1. */ 97 *p++ = 0xc3; /* Interpolate to maximum size. */ 98 *p++ = 0xc3; /* Full color range 1. */ 99 *p++ = 0xc0; /* Color conversion from printer. */ 100 *p++ = 0xc0; /* Color manipulation from printer. */ 101 *p++ = 0xc0; /* B/W inversion from printer. */ 102 *p++ = 0xc3; /* Portrait mode centered. */ 103 *p++ = 0xc9; /* Use printer default for media and printing. */ 104 *p++ = 0x95; 105 *p++ = 0x81; 106 107 for (checksum = 0, i = 0; &header[i] != p; i++) 108 checksum += header[i]; 109 110 *p++ = ((checksum%128)&0x7f) | 0x80; 111 *p = 0x02; /* end of line. */ 112 /* write header */ 113 if (fwrite(header,1,22,ps_stream) != 22) { 114 errprintf("Could not write header (t4693d).\n"); 115 gs_free(data, line_size, 1, "t4693d_print_page"); 116 return_error(gs_error_ioerror); 117 } 118 119 for (lnum = 0; lnum < prn_dev->height; lnum++) { 120 gdev_prn_copy_scan_lines(prn_dev,lnum,data,line_size); 121 122 for (i = 0; i < line_size; i += data_size) { 123 124 switch (depth) { 125 case 8: 126 data[i] &= 0x3f; 127 break; 128 case 16: 129 #if arch_is_big_endian 130 data[i] &= 0x0f; 131 #else 132 swap = data[i]; 133 data[i] = data[i + 1]&0x0f; 134 data[i + 1] = swap; 135 #endif 136 break; 137 case 24: 138 break; 139 default: 140 errprintf("Bad depth (%d) t4693d.\n",depth); 141 gs_free(data, line_size, 1, "t4693d_print_page"); 142 return_error(gs_error_rangecheck); 143 } 144 145 if (fwrite(&data[i],1,data_size,ps_stream) != data_size) { 146 errprintf("Could not write pixel (t4693d).\n"); 147 gs_free(data, line_size, 1, "t4693d_print_page"); 148 return_error(gs_error_ioerror); 149 } 150 151 } 152 153 if (fputc(0x02,ps_stream) != 0x02) { 154 errprintf("Could not write EOL (t4693d).\n"); 155 gs_free(data, line_size, 1, "t4693d_print_page"); 156 return_error(gs_error_ioerror); 157 } 158 159 } 160 161 if (fputc(0x01,ps_stream) != 0x01) { 162 errprintf("Could not write EOT (t4693d).\n"); 163 gs_free(data, line_size, 1, "t4693d_print_page"); 164 return_error(gs_error_ioerror); 165 } 166 167 gs_free(data, line_size, 1, "t4693d_print_page"); 168 return(0); 169 } 170