| 1 |
greg |
1.1 |
#ifndef lint |
| 2 |
schorsch |
2.6 |
static const char RCSid[] = "$Id: aedimage.c,v 2.5 2003/02/22 02:07:27 greg Exp $"; |
| 3 |
greg |
1.1 |
#endif |
| 4 |
|
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/* |
| 5 |
|
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* aedimage.c - RADIANCE driver for AED 512 terminal. |
| 6 |
|
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* |
| 7 |
|
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* 3/20/86 |
| 8 |
|
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* 3/3/88 Added calls to Paul Heckbert's ciq routines |
| 9 |
|
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*/ |
| 10 |
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| 11 |
|
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#include <stdio.h> |
| 12 |
greg |
2.3 |
#include <math.h> |
| 13 |
greg |
1.1 |
#include <signal.h> |
| 14 |
|
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#include <sys/ioctl.h> |
| 15 |
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|
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| 16 |
|
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#include "pic.h" |
| 17 |
schorsch |
2.6 |
#include "resolu.h" |
| 18 |
greg |
1.1 |
#include "color.h" |
| 19 |
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| 20 |
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| 21 |
|
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/* AED command characters */ |
| 22 |
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| 23 |
|
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#define AEDFMT "1888N" /* Format string to send to AED */ |
| 24 |
|
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#define CSTAT 0100 /* Console status: lower case */ |
| 25 |
|
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#define SCS 96 /* Set Console Status */ |
| 26 |
|
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#define SCT 75 /* Set color lookup table */ |
| 27 |
|
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#define SEC 67 /* Set color for vector drawing */ |
| 28 |
|
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#define MOV 81 /* Set CAP (current access pointer) to x, y */ |
| 29 |
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#define MVR 105 /* Set CAP relative */ |
| 30 |
|
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#define DVA 65 /* Draw vector to new CAP x, y */ |
| 31 |
|
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#define DVR 108 /* Draw vector relative */ |
| 32 |
|
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#define WHS 88 /* Write horizontal scan */ |
| 33 |
|
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#define WHR 92 /* Write horizontal runs */ |
| 34 |
|
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#define OPT 40 /* Miscellaneous terminal control */ |
| 35 |
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#define SEN 71 /* Set encoding types */ |
| 36 |
|
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#define RST 48 /* Reset terminal */ |
| 37 |
|
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#define FFD 12 /* Clear screen */ |
| 38 |
|
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#define SCS 96 /* Set status */ |
| 39 |
|
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#define DAI 114 /* Define area of interest */ |
| 40 |
|
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#define EJC 85 /* Enable Joystick cursor positioning */ |
| 41 |
|
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#define DJC 100 /* Disable Joystick cursor positioning */ |
| 42 |
|
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#define SCC 99 /* Set Cursor Colors */ |
| 43 |
|
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#define SCP 93 /* Set Cursor Parameters */ |
| 44 |
|
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#define RCP 106 /* Read Cursor Position */ |
| 45 |
|
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#define MAXRLEN 255 /* Maximum runlength for a span */ |
| 46 |
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#define NUL 0 /* Null terminates run sequences */ |
| 47 |
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#define ESC 27 /* Escape starts a command sequence */ |
| 48 |
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#define END 1 /* Ctrl-A used to terminate command mode */ |
| 49 |
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| 50 |
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#define BLK 0 /* color table entry for black */ |
| 51 |
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#define WHT 7 /* color table entry for white */ |
| 52 |
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| 53 |
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#define command(c) (putc(ESC, stdout), putc(c, stdout)) |
| 54 |
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#define byte(b) putc(b, stdout) |
| 55 |
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#define flush() fflush(stdout) |
| 56 |
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| 57 |
greg |
1.2 |
#define GAMMA 2.5 /* gamma value used in correction */ |
| 58 |
greg |
1.1 |
|
| 59 |
|
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#define MINCOLOR 8 /* start of device color table */ |
| 60 |
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| 61 |
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#define NCOLORS 248 /* available color table size */ |
| 62 |
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| 63 |
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#define NROWS 512 /* maximum # rows for output */ |
| 64 |
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#define NCOLS 512 /* maximum # columns for output */ |
| 65 |
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| 66 |
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int dither = 0; /* dither colors? */ |
| 67 |
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| 68 |
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int greyscale = 0; /* grey only? */ |
| 69 |
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| 70 |
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int initialized = 0; |
| 71 |
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struct sgttyb oldflags; |
| 72 |
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int oldlmode; |
| 73 |
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| 74 |
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int intrcnt = 0; /* interrupt well */ |
| 75 |
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| 76 |
|
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#define disintr() (intrcnt--) /* disable interrupts */ |
| 77 |
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#define enaintr() onintr() /* enable interrupts */ |
| 78 |
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| 79 |
|
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char *progname; |
| 80 |
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| 81 |
|
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char errmsg[128]; |
| 82 |
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| 83 |
|
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COLR scanline[NCOLS]; |
| 84 |
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| 85 |
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colormap colrtbl; |
| 86 |
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| 87 |
|
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int cury; |
| 88 |
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| 89 |
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int xmax, ymax; |
| 90 |
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| 91 |
|
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FILE *fin; |
| 92 |
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| 93 |
|
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extern long ftell(); |
| 94 |
|
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long scanpos[NROWS]; |
| 95 |
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| 96 |
|
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double exposure = 1.0; |
| 97 |
greg |
1.10 |
int wrong_fmt = 0; |
| 98 |
greg |
1.1 |
|
| 99 |
schorsch |
2.6 |
static gethfunc checkhead; |
| 100 |
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| 101 |
greg |
1.1 |
|
| 102 |
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main(argc, argv) |
| 103 |
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int argc; |
| 104 |
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char *argv[]; |
| 105 |
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{ |
| 106 |
schorsch |
2.6 |
int onintr(); |
| 107 |
greg |
1.1 |
char sbuf[256]; |
| 108 |
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register int i; |
| 109 |
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| 110 |
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progname = argv[0]; |
| 111 |
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| 112 |
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#ifdef SIGTSTP |
| 113 |
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signal(SIGTSTP, SIG_IGN); |
| 114 |
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#endif |
| 115 |
|
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if (signal(SIGINT, onintr) == SIG_IGN) |
| 116 |
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signal(SIGINT, SIG_IGN); |
| 117 |
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| 118 |
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for (i = 1; i < argc; i++) |
| 119 |
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if (argv[i][0] == '-') |
| 120 |
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switch (argv[i][1]) { |
| 121 |
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case 'd': |
| 122 |
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dither = !dither; |
| 123 |
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break; |
| 124 |
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case 'b': |
| 125 |
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greyscale = !greyscale; |
| 126 |
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break; |
| 127 |
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default: |
| 128 |
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goto userr; |
| 129 |
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} |
| 130 |
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else |
| 131 |
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break; |
| 132 |
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| 133 |
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if (i+1 != argc) |
| 134 |
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goto userr; |
| 135 |
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| 136 |
|
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if ((fin = fopen(argv[i], "r")) == NULL) { |
| 137 |
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sprintf(errmsg, "can't open file \"%s\"", argv[i]); |
| 138 |
|
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quitmsg(errmsg); |
| 139 |
|
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} |
| 140 |
|
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/* get header */ |
| 141 |
greg |
1.10 |
getheader(fin, checkhead, NULL); |
| 142 |
|
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if (wrong_fmt) |
| 143 |
|
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quitmsg("input must be a Radiance picture"); |
| 144 |
greg |
1.1 |
/* get picture dimensions */ |
| 145 |
greg |
1.11 |
if (fgetresolu(&xmax, &ymax, fin) < 0) |
| 146 |
greg |
1.1 |
quitmsg("bad picture size"); |
| 147 |
|
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if (xmax > NCOLS || ymax > NROWS) |
| 148 |
|
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quitmsg("resolution mismatch"); |
| 149 |
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| 150 |
|
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init(); /* initialize terminal for output */ |
| 151 |
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| 152 |
|
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for (i = 0; i < NROWS; i++) |
| 153 |
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scanpos[i] = -1; |
| 154 |
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| 155 |
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if (greyscale) /* map colors and display */ |
| 156 |
|
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biq(dither,NCOLORS,1,colrtbl); |
| 157 |
|
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else |
| 158 |
|
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ciq(dither,NCOLORS,1,colrtbl); |
| 159 |
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| 160 |
|
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loopcom(); |
| 161 |
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| 162 |
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quitmsg(NULL); |
| 163 |
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userr: |
| 164 |
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fprintf(stderr, "Usage: %s [-d][-b] input\n", progname); |
| 165 |
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quit(1); |
| 166 |
greg |
1.4 |
} |
| 167 |
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| 168 |
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| 169 |
schorsch |
2.6 |
static int |
| 170 |
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checkhead( /* deal with line from header */ |
| 171 |
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char *line, |
| 172 |
|
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void *p |
| 173 |
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) |
| 174 |
greg |
1.4 |
{ |
| 175 |
greg |
1.10 |
char fmt[32]; |
| 176 |
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| 177 |
greg |
1.6 |
if (isexpos(line)) |
| 178 |
|
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exposure *= exposval(line); |
| 179 |
greg |
1.10 |
else if (isformat(line)) { |
| 180 |
|
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formatval(fmt, line); |
| 181 |
|
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wrong_fmt = strcmp(fmt, COLRFMT); |
| 182 |
|
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} |
| 183 |
gwlarson |
2.4 |
return(0); |
| 184 |
greg |
1.1 |
} |
| 185 |
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| 186 |
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| 187 |
|
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init() /* initialize terminal */ |
| 188 |
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{ |
| 189 |
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struct sgttyb flags; |
| 190 |
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int lmode; |
| 191 |
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| 192 |
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if (isatty(1)) { |
| 193 |
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/* Set literal mode so AED gets bit 8 */ |
| 194 |
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ioctl(1, TIOCLGET, &oldlmode); |
| 195 |
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lmode = oldlmode | LLITOUT | LNOFLSH; |
| 196 |
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ioctl(1, TIOCLSET, &lmode); |
| 197 |
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ioctl(1, TIOCLGET, &lmode); /* 4.2 bug */ |
| 198 |
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/* Turn terminal echoing off */ |
| 199 |
|
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ioctl(1, TIOCGETP, &oldflags); |
| 200 |
|
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ioctl(1, TIOCGETP, &flags); |
| 201 |
|
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flags.sg_flags &= ~ECHO; |
| 202 |
|
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ioctl(1, TIOCSETP, &flags); |
| 203 |
|
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initialized = 1; |
| 204 |
|
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} else |
| 205 |
|
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quitmsg("output must be to a terminal"); |
| 206 |
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| 207 |
|
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/* Reset AED and tell it the data format */ |
| 208 |
|
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command(RST); |
| 209 |
|
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longwait(2); |
| 210 |
|
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command(OPT); |
| 211 |
|
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byte(6); byte(1); /* AED command set */ |
| 212 |
|
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command(SEN); fputs(AEDFMT, stdout); |
| 213 |
|
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command(SCS); byte(CSTAT); /* console status */ |
| 214 |
|
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command(FFD); /* clear screen */ |
| 215 |
|
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flush(); |
| 216 |
|
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} |
| 217 |
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| 218 |
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| 219 |
|
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onintr() /* die gracefully */ |
| 220 |
|
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{ |
| 221 |
|
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if (++intrcnt > 0) |
| 222 |
|
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quitmsg("interrupt"); |
| 223 |
|
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} |
| 224 |
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| 225 |
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| 226 |
|
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quitmsg(err) /* uninitialize terminal and exit */ |
| 227 |
|
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char *err; |
| 228 |
|
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{ |
| 229 |
|
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if (initialized) { /* close AED */ |
| 230 |
|
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command(DJC); /* disable cursor */ |
| 231 |
|
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command(SEC); |
| 232 |
|
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byte(WHT); /* Set color to white */ |
| 233 |
|
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aedsetcap(0, 0); /* Put cursor in a good place */ |
| 234 |
|
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byte(END); |
| 235 |
|
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flush(); |
| 236 |
|
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ioctl(1, TIOCSETP, &oldflags); |
| 237 |
|
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ioctl(1, TIOCLSET, &oldlmode); |
| 238 |
|
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putchar('\n'); |
| 239 |
|
|
} |
| 240 |
|
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if (err != NULL) { |
| 241 |
|
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fprintf(stderr, "%s: %s\n", progname, err); |
| 242 |
|
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exit(1); |
| 243 |
|
|
} |
| 244 |
|
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exit(0); |
| 245 |
|
|
} |
| 246 |
|
|
|
| 247 |
|
|
|
| 248 |
greg |
2.5 |
void |
| 249 |
greg |
1.1 |
eputs(s) |
| 250 |
|
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char *s; |
| 251 |
|
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{ |
| 252 |
|
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fputs(s, stderr); |
| 253 |
|
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} |
| 254 |
|
|
|
| 255 |
|
|
|
| 256 |
greg |
2.5 |
void |
| 257 |
greg |
1.1 |
quit(status) |
| 258 |
|
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int status; |
| 259 |
|
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{ |
| 260 |
|
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quitmsg(status ? "aborted" : NULL); |
| 261 |
|
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} |
| 262 |
|
|
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| 263 |
|
|
|
| 264 |
|
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loopcom() /* print pixel values interactively */ |
| 265 |
|
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{ |
| 266 |
|
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int coffset[3]; /* color table offset */ |
| 267 |
|
|
struct sgttyb flags; |
| 268 |
|
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COLOR cval, ctmp; |
| 269 |
|
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int rept, x, y, j; |
| 270 |
|
|
register int com, i; |
| 271 |
|
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/* Set raw mode on input */ |
| 272 |
|
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ioctl(0, TIOCGETP, &flags); |
| 273 |
|
|
flags.sg_flags |= RAW; |
| 274 |
|
|
flags.sg_flags &= ~ECHO; |
| 275 |
|
|
ioctl(0, TIOCSETP, &flags); |
| 276 |
|
|
|
| 277 |
|
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coffset[0] = coffset[1] = coffset[2] = 0; |
| 278 |
|
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/* set cursor type */ |
| 279 |
|
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command(SCC); |
| 280 |
|
|
byte(BLK); byte(WHT); byte(15); |
| 281 |
|
|
command(SCP); |
| 282 |
|
|
byte('+'); byte(0); byte(1); |
| 283 |
|
|
/* loop on command */ |
| 284 |
|
|
for ( ; ; ) { |
| 285 |
|
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command(EJC); /* enable cursor */ |
| 286 |
|
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flush(); |
| 287 |
|
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rept = 0; /* get command */ |
| 288 |
|
|
while ((com = getc(stdin)) >= '0' && com <= '9') |
| 289 |
|
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rept = rept*10 + com - '0'; |
| 290 |
|
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if (rept == 0) rept = 1; |
| 291 |
|
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command(DJC); /* disable cursor */ |
| 292 |
|
|
switch (com) { |
| 293 |
|
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case '\r': |
| 294 |
|
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case '\n': |
| 295 |
|
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case 'l': |
| 296 |
|
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case 'L': |
| 297 |
|
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case 'c': |
| 298 |
|
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case 'C': |
| 299 |
|
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case 'p': |
| 300 |
|
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case 'P': |
| 301 |
|
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case '=': |
| 302 |
|
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aedgetcap(&x, &y); /* get cursor position */ |
| 303 |
|
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y = ymax-1-y; |
| 304 |
|
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if (y < 0 || scanpos[y] == -1) /* off picture? */ |
| 305 |
|
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break; |
| 306 |
|
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/* get value */ |
| 307 |
|
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setcolor(cval, 0.0, 0.0, 0.0); |
| 308 |
|
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for (j = rept-1; j >= 0; j--) { |
| 309 |
|
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if (y+j >= NROWS || scanpos[y+j] == -1) |
| 310 |
|
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continue; |
| 311 |
|
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getscan(y+j); |
| 312 |
|
|
for (i = 0; i < rept; i++) |
| 313 |
|
|
if (x+i < xmax) { |
| 314 |
|
|
colr_color(ctmp, scanline[x+i]); |
| 315 |
|
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addcolor(cval, ctmp); |
| 316 |
|
|
} |
| 317 |
|
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} |
| 318 |
|
|
scalecolor(cval, 1.0/(rept*rept)); |
| 319 |
|
|
/* print value */ |
| 320 |
|
|
command(SEC); |
| 321 |
|
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byte(scanline[(x+20)%xmax][EXP] >= COLXS ? BLK : WHT); |
| 322 |
|
|
byte(END); |
| 323 |
|
|
switch (com) { |
| 324 |
|
|
case '\r': |
| 325 |
|
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case '\n': |
| 326 |
|
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printf("%-3g", intens(cval)/exposure); |
| 327 |
|
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break; |
| 328 |
|
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case 'l': |
| 329 |
|
|
case 'L': |
| 330 |
greg |
1.9 |
printf("%-3gL", luminance(cval)/exposure); |
| 331 |
greg |
1.1 |
break; |
| 332 |
|
|
case 'c': |
| 333 |
|
|
case 'C': |
| 334 |
|
|
printf("(%.2f,%.2f,%.2f)", |
| 335 |
|
|
colval(cval,RED), |
| 336 |
|
|
colval(cval,GRN), |
| 337 |
|
|
colval(cval,BLU)); |
| 338 |
|
|
break; |
| 339 |
|
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case 'p': |
| 340 |
|
|
case 'P': |
| 341 |
|
|
printf("(%d,%d)", x, y); |
| 342 |
|
|
break; |
| 343 |
|
|
case '=': |
| 344 |
|
|
printf("(%d,%d,%d)", coffset[0], |
| 345 |
|
|
coffset[1], coffset[2]); |
| 346 |
|
|
break; |
| 347 |
|
|
} |
| 348 |
|
|
break; |
| 349 |
|
|
case 'w': |
| 350 |
|
|
rept = -rept; |
| 351 |
|
|
case 'W': |
| 352 |
|
|
coffset[0] += rept; |
| 353 |
|
|
coffset[1] += rept; |
| 354 |
|
|
coffset[2] += rept; |
| 355 |
|
|
movecolor(coffset); |
| 356 |
|
|
break; |
| 357 |
|
|
case 'r': |
| 358 |
|
|
rept = -rept; |
| 359 |
|
|
case 'R': |
| 360 |
|
|
coffset[0] += rept; |
| 361 |
|
|
movecolor(coffset); |
| 362 |
|
|
break; |
| 363 |
|
|
case 'g': |
| 364 |
|
|
rept = -rept; |
| 365 |
|
|
case 'G': |
| 366 |
|
|
coffset[1] += rept; |
| 367 |
|
|
movecolor(coffset); |
| 368 |
|
|
break; |
| 369 |
|
|
case 'b': |
| 370 |
|
|
rept = -rept; |
| 371 |
|
|
case 'B': |
| 372 |
|
|
coffset[2] += rept; |
| 373 |
|
|
movecolor(coffset); |
| 374 |
|
|
break; |
| 375 |
|
|
case '!': |
| 376 |
|
|
coffset[0] = coffset[1] = coffset[2] = 0; |
| 377 |
|
|
movecolor(coffset); |
| 378 |
|
|
break; |
| 379 |
|
|
case 'C'-'@': |
| 380 |
|
|
case 'q': |
| 381 |
|
|
case 'Q': |
| 382 |
|
|
return; |
| 383 |
|
|
} |
| 384 |
|
|
} |
| 385 |
|
|
} |
| 386 |
|
|
|
| 387 |
|
|
|
| 388 |
|
|
getscan(y) |
| 389 |
|
|
int y; |
| 390 |
|
|
{ |
| 391 |
|
|
if (y != cury) { |
| 392 |
|
|
if (scanpos[y] == -1) |
| 393 |
|
|
quitmsg("cannot seek in getscan"); |
| 394 |
|
|
if (fseek(fin, scanpos[y], 0) == -1) |
| 395 |
|
|
quitmsg("fseek error"); |
| 396 |
|
|
cury = y; |
| 397 |
|
|
} else |
| 398 |
|
|
scanpos[y] = ftell(fin); |
| 399 |
|
|
|
| 400 |
|
|
if (freadcolrs(scanline, xmax, fin) < 0) |
| 401 |
|
|
quitmsg("read error"); |
| 402 |
|
|
|
| 403 |
|
|
cury++; |
| 404 |
|
|
} |
| 405 |
|
|
|
| 406 |
|
|
|
| 407 |
|
|
picreadline3(y, l3) /* read in 3-byte scanline */ |
| 408 |
|
|
int y; |
| 409 |
|
|
register rgbpixel *l3; |
| 410 |
|
|
{ |
| 411 |
greg |
1.5 |
register int i; |
| 412 |
|
|
/* read scanline */ |
| 413 |
greg |
1.1 |
getscan(y); |
| 414 |
|
|
/* convert scanline */ |
| 415 |
greg |
1.7 |
normcolrs(scanline, xmax, 0); |
| 416 |
greg |
1.5 |
for (i = 0; i < xmax; i++) { |
| 417 |
|
|
l3[i].r = scanline[i][RED]; |
| 418 |
|
|
l3[i].g = scanline[i][GRN]; |
| 419 |
|
|
l3[i].b = scanline[i][BLU]; |
| 420 |
greg |
1.1 |
} |
| 421 |
|
|
} |
| 422 |
|
|
|
| 423 |
|
|
|
| 424 |
|
|
picwriteline(y, l) /* output scan line of pixel values */ |
| 425 |
|
|
int y; |
| 426 |
|
|
register pixel *l; |
| 427 |
|
|
{ |
| 428 |
|
|
int curpix; |
| 429 |
|
|
register int n, ncols; |
| 430 |
|
|
|
| 431 |
|
|
disintr(); /* disable interrupts */ |
| 432 |
|
|
aedsetcap(0, ymax-1-y); |
| 433 |
|
|
command(DAI); |
| 434 |
|
|
aedcoord(xmax-1, ymax-1-y); |
| 435 |
|
|
ncols = xmax; |
| 436 |
|
|
if (dither) { /* pixel run lengths short */ |
| 437 |
|
|
command(WHS); |
| 438 |
|
|
while (ncols-- > 0) |
| 439 |
|
|
byte(MINCOLOR + *l++); |
| 440 |
|
|
} else { /* pixel run lengths long */ |
| 441 |
|
|
command(WHR); |
| 442 |
|
|
while (ncols-- > 0) { |
| 443 |
|
|
curpix = *l++; |
| 444 |
|
|
for (n = 1; n < MAXRLEN; n++) { |
| 445 |
|
|
if (ncols <= 0 || *l != curpix) |
| 446 |
|
|
break; |
| 447 |
|
|
l++; ncols--; |
| 448 |
|
|
} |
| 449 |
|
|
byte(n); |
| 450 |
|
|
byte(MINCOLOR + curpix); |
| 451 |
|
|
} |
| 452 |
|
|
byte(NUL); |
| 453 |
|
|
} |
| 454 |
|
|
flush(); |
| 455 |
|
|
enaintr(); /* enable interrupts */ |
| 456 |
|
|
} |
| 457 |
|
|
|
| 458 |
|
|
|
| 459 |
|
|
/* |
| 460 |
|
|
* aedsetcap - sets AED's current access pointer to (x, y). Used |
| 461 |
|
|
* before writing a span to put it in the right place. |
| 462 |
|
|
*/ |
| 463 |
|
|
|
| 464 |
|
|
aedsetcap(x, y) |
| 465 |
|
|
register int x, y; |
| 466 |
|
|
{ |
| 467 |
|
|
command(MOV); |
| 468 |
|
|
aedcoord(x, y); |
| 469 |
|
|
} |
| 470 |
|
|
|
| 471 |
|
|
/* |
| 472 |
|
|
* aedcoord - puts out an (x, y) coordinate in AED 8 bit format. |
| 473 |
|
|
*/ |
| 474 |
|
|
|
| 475 |
|
|
aedcoord(x, y) |
| 476 |
|
|
register int x, y; |
| 477 |
|
|
{ |
| 478 |
|
|
putc(((x >> 4) & 0x30) | ((y >> 8) & 0x3), stdout); |
| 479 |
|
|
putc(x & 0xff, stdout); |
| 480 |
|
|
putc(y & 0xff, stdout); |
| 481 |
|
|
} |
| 482 |
|
|
|
| 483 |
|
|
|
| 484 |
|
|
aedgetcap(xp, yp) /* get cursor postion */ |
| 485 |
|
|
int *xp, *yp; |
| 486 |
|
|
{ |
| 487 |
|
|
register int c; |
| 488 |
|
|
/* get cursor postition */ |
| 489 |
|
|
command(RCP); |
| 490 |
|
|
flush(); |
| 491 |
|
|
c = getc(stdin); |
| 492 |
|
|
*xp = (c & 0x30) << 4; |
| 493 |
|
|
*yp = (c & 0x3) << 8; |
| 494 |
|
|
*xp |= getc(stdin); |
| 495 |
|
|
*yp |= getc(stdin); |
| 496 |
|
|
} |
| 497 |
|
|
|
| 498 |
|
|
|
| 499 |
|
|
movecolor(offset) /* move our color table up or down */ |
| 500 |
|
|
int offset[3]; |
| 501 |
|
|
{ |
| 502 |
|
|
register int i, j, c; |
| 503 |
|
|
|
| 504 |
|
|
disintr(); |
| 505 |
|
|
command(SCT); |
| 506 |
|
|
byte(MINCOLOR); |
| 507 |
|
|
byte(NCOLORS); |
| 508 |
|
|
for (i = 0; i < NCOLORS; i++) |
| 509 |
|
|
for (j = 0; j < 3; j++) { |
| 510 |
|
|
c = colrtbl[j][i] + offset[j]; |
| 511 |
|
|
if (c < 0) |
| 512 |
|
|
byte(0); |
| 513 |
|
|
else if (c > 255) |
| 514 |
|
|
byte(255); |
| 515 |
|
|
else |
| 516 |
|
|
byte(c); |
| 517 |
|
|
} |
| 518 |
|
|
shortwait(20); |
| 519 |
|
|
enaintr(); |
| 520 |
|
|
} |
| 521 |
|
|
|
| 522 |
|
|
|
| 523 |
|
|
picreadcm(map) /* do gamma correction */ |
| 524 |
|
|
colormap map; |
| 525 |
|
|
{ |
| 526 |
|
|
register int i, val; |
| 527 |
|
|
|
| 528 |
|
|
for (i = 0; i < 256; i++) { |
| 529 |
greg |
1.8 |
val = pow((i+0.5)/256.0, 1.0/GAMMA) * 256.0; |
| 530 |
greg |
1.1 |
map[0][i] = map[1][i] = map[2][i] = val; |
| 531 |
|
|
} |
| 532 |
|
|
} |
| 533 |
|
|
|
| 534 |
|
|
|
| 535 |
|
|
picwritecm(map) /* write out color map */ |
| 536 |
|
|
colormap map; |
| 537 |
|
|
{ |
| 538 |
|
|
register int i, j; |
| 539 |
|
|
|
| 540 |
|
|
disintr(); |
| 541 |
|
|
command(SCT); |
| 542 |
|
|
byte(MINCOLOR); |
| 543 |
|
|
byte(NCOLORS); |
| 544 |
|
|
for (i = 0; i < NCOLORS; i++) |
| 545 |
|
|
for (j = 0; j < 3; j++) |
| 546 |
|
|
byte(map[j][i]); |
| 547 |
|
|
shortwait(20); |
| 548 |
|
|
enaintr(); |
| 549 |
|
|
} |
| 550 |
|
|
|
| 551 |
|
|
|
| 552 |
|
|
longwait(t) /* longer wait */ |
| 553 |
|
|
int t; |
| 554 |
|
|
{ |
| 555 |
|
|
flush(); |
| 556 |
|
|
sleep(t); |
| 557 |
|
|
} |
| 558 |
|
|
|
| 559 |
|
|
|
| 560 |
|
|
shortwait(t) /* shorter wait */ |
| 561 |
|
|
int t; |
| 562 |
|
|
{ |
| 563 |
|
|
register long l = t*1000; |
| 564 |
|
|
|
| 565 |
|
|
flush(); |
| 566 |
|
|
while (l--) |
| 567 |
|
|
; |
| 568 |
|
|
} |
