1 |
#ifndef lint |
2 |
static const char RCSid[] = "$Id: aedimage.c,v 2.5 2003/02/22 02:07:27 greg Exp $"; |
3 |
#endif |
4 |
/* |
5 |
* aedimage.c - RADIANCE driver for AED 512 terminal. |
6 |
* |
7 |
* 3/20/86 |
8 |
* 3/3/88 Added calls to Paul Heckbert's ciq routines |
9 |
*/ |
10 |
|
11 |
#include <stdio.h> |
12 |
#include <math.h> |
13 |
#include <signal.h> |
14 |
#include <sys/ioctl.h> |
15 |
|
16 |
#include "pic.h" |
17 |
#include "resolu.h" |
18 |
#include "color.h" |
19 |
|
20 |
|
21 |
/* AED command characters */ |
22 |
|
23 |
#define AEDFMT "1888N" /* Format string to send to AED */ |
24 |
#define CSTAT 0100 /* Console status: lower case */ |
25 |
#define SCS 96 /* Set Console Status */ |
26 |
#define SCT 75 /* Set color lookup table */ |
27 |
#define SEC 67 /* Set color for vector drawing */ |
28 |
#define MOV 81 /* Set CAP (current access pointer) to x, y */ |
29 |
#define MVR 105 /* Set CAP relative */ |
30 |
#define DVA 65 /* Draw vector to new CAP x, y */ |
31 |
#define DVR 108 /* Draw vector relative */ |
32 |
#define WHS 88 /* Write horizontal scan */ |
33 |
#define WHR 92 /* Write horizontal runs */ |
34 |
#define OPT 40 /* Miscellaneous terminal control */ |
35 |
#define SEN 71 /* Set encoding types */ |
36 |
#define RST 48 /* Reset terminal */ |
37 |
#define FFD 12 /* Clear screen */ |
38 |
#define SCS 96 /* Set status */ |
39 |
#define DAI 114 /* Define area of interest */ |
40 |
#define EJC 85 /* Enable Joystick cursor positioning */ |
41 |
#define DJC 100 /* Disable Joystick cursor positioning */ |
42 |
#define SCC 99 /* Set Cursor Colors */ |
43 |
#define SCP 93 /* Set Cursor Parameters */ |
44 |
#define RCP 106 /* Read Cursor Position */ |
45 |
#define MAXRLEN 255 /* Maximum runlength for a span */ |
46 |
#define NUL 0 /* Null terminates run sequences */ |
47 |
#define ESC 27 /* Escape starts a command sequence */ |
48 |
#define END 1 /* Ctrl-A used to terminate command mode */ |
49 |
|
50 |
#define BLK 0 /* color table entry for black */ |
51 |
#define WHT 7 /* color table entry for white */ |
52 |
|
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#define command(c) (putc(ESC, stdout), putc(c, stdout)) |
54 |
#define byte(b) putc(b, stdout) |
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#define flush() fflush(stdout) |
56 |
|
57 |
#define GAMMA 2.5 /* gamma value used in correction */ |
58 |
|
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#define MINCOLOR 8 /* start of device color table */ |
60 |
|
61 |
#define NCOLORS 248 /* available color table size */ |
62 |
|
63 |
#define NROWS 512 /* maximum # rows for output */ |
64 |
#define NCOLS 512 /* maximum # columns for output */ |
65 |
|
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int dither = 0; /* dither colors? */ |
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|
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int greyscale = 0; /* grey only? */ |
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|
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int initialized = 0; |
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struct sgttyb oldflags; |
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int oldlmode; |
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|
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int intrcnt = 0; /* interrupt well */ |
75 |
|
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#define disintr() (intrcnt--) /* disable interrupts */ |
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#define enaintr() onintr() /* enable interrupts */ |
78 |
|
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char *progname; |
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|
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char errmsg[128]; |
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|
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COLR scanline[NCOLS]; |
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|
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colormap colrtbl; |
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|
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int cury; |
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|
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int xmax, ymax; |
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|
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FILE *fin; |
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|
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extern long ftell(); |
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long scanpos[NROWS]; |
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|
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double exposure = 1.0; |
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int wrong_fmt = 0; |
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|
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static gethfunc checkhead; |
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|
101 |
|
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main(argc, argv) |
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int argc; |
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char *argv[]; |
105 |
{ |
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int onintr(); |
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char sbuf[256]; |
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register int i; |
109 |
|
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progname = argv[0]; |
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|
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#ifdef SIGTSTP |
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signal(SIGTSTP, SIG_IGN); |
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#endif |
115 |
if (signal(SIGINT, onintr) == SIG_IGN) |
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signal(SIGINT, SIG_IGN); |
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|
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for (i = 1; i < argc; i++) |
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if (argv[i][0] == '-') |
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switch (argv[i][1]) { |
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case 'd': |
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dither = !dither; |
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break; |
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case 'b': |
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greyscale = !greyscale; |
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break; |
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default: |
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goto userr; |
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} |
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else |
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break; |
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|
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if (i+1 != argc) |
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goto userr; |
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|
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if ((fin = fopen(argv[i], "r")) == NULL) { |
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sprintf(errmsg, "can't open file \"%s\"", argv[i]); |
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quitmsg(errmsg); |
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} |
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/* get header */ |
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getheader(fin, checkhead, NULL); |
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if (wrong_fmt) |
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quitmsg("input must be a Radiance picture"); |
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/* get picture dimensions */ |
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if (fgetresolu(&xmax, &ymax, fin) < 0) |
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quitmsg("bad picture size"); |
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if (xmax > NCOLS || ymax > NROWS) |
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quitmsg("resolution mismatch"); |
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|
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init(); /* initialize terminal for output */ |
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|
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for (i = 0; i < NROWS; i++) |
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scanpos[i] = -1; |
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|
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if (greyscale) /* map colors and display */ |
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biq(dither,NCOLORS,1,colrtbl); |
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else |
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ciq(dither,NCOLORS,1,colrtbl); |
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|
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loopcom(); |
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|
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quitmsg(NULL); |
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userr: |
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fprintf(stderr, "Usage: %s [-d][-b] input\n", progname); |
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quit(1); |
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} |
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|
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|
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static int |
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checkhead( /* deal with line from header */ |
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char *line, |
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void *p |
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) |
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{ |
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char fmt[32]; |
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|
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if (isexpos(line)) |
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exposure *= exposval(line); |
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else if (isformat(line)) { |
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formatval(fmt, line); |
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wrong_fmt = strcmp(fmt, COLRFMT); |
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} |
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return(0); |
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} |
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|
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|
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init() /* initialize terminal */ |
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{ |
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struct sgttyb flags; |
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int lmode; |
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|
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if (isatty(1)) { |
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/* Set literal mode so AED gets bit 8 */ |
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ioctl(1, TIOCLGET, &oldlmode); |
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lmode = oldlmode | LLITOUT | LNOFLSH; |
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ioctl(1, TIOCLSET, &lmode); |
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ioctl(1, TIOCLGET, &lmode); /* 4.2 bug */ |
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/* Turn terminal echoing off */ |
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ioctl(1, TIOCGETP, &oldflags); |
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ioctl(1, TIOCGETP, &flags); |
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flags.sg_flags &= ~ECHO; |
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ioctl(1, TIOCSETP, &flags); |
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initialized = 1; |
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} else |
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quitmsg("output must be to a terminal"); |
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|
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/* Reset AED and tell it the data format */ |
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command(RST); |
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longwait(2); |
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command(OPT); |
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byte(6); byte(1); /* AED command set */ |
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command(SEN); fputs(AEDFMT, stdout); |
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command(SCS); byte(CSTAT); /* console status */ |
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command(FFD); /* clear screen */ |
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flush(); |
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} |
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|
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|
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onintr() /* die gracefully */ |
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{ |
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if (++intrcnt > 0) |
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quitmsg("interrupt"); |
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} |
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|
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|
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quitmsg(err) /* uninitialize terminal and exit */ |
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char *err; |
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{ |
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if (initialized) { /* close AED */ |
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command(DJC); /* disable cursor */ |
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command(SEC); |
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byte(WHT); /* Set color to white */ |
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aedsetcap(0, 0); /* Put cursor in a good place */ |
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byte(END); |
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flush(); |
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ioctl(1, TIOCSETP, &oldflags); |
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ioctl(1, TIOCLSET, &oldlmode); |
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putchar('\n'); |
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} |
240 |
if (err != NULL) { |
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fprintf(stderr, "%s: %s\n", progname, err); |
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exit(1); |
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} |
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exit(0); |
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} |
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|
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|
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void |
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eputs(s) |
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char *s; |
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{ |
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fputs(s, stderr); |
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} |
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|
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|
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void |
257 |
quit(status) |
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int status; |
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{ |
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quitmsg(status ? "aborted" : NULL); |
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} |
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|
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|
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loopcom() /* print pixel values interactively */ |
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{ |
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int coffset[3]; /* color table offset */ |
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struct sgttyb flags; |
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COLOR cval, ctmp; |
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int rept, x, y, j; |
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register int com, i; |
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/* Set raw mode on input */ |
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ioctl(0, TIOCGETP, &flags); |
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flags.sg_flags |= RAW; |
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flags.sg_flags &= ~ECHO; |
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ioctl(0, TIOCSETP, &flags); |
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|
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coffset[0] = coffset[1] = coffset[2] = 0; |
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/* set cursor type */ |
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command(SCC); |
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byte(BLK); byte(WHT); byte(15); |
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command(SCP); |
282 |
byte('+'); byte(0); byte(1); |
283 |
/* loop on command */ |
284 |
for ( ; ; ) { |
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command(EJC); /* enable cursor */ |
286 |
flush(); |
287 |
rept = 0; /* get command */ |
288 |
while ((com = getc(stdin)) >= '0' && com <= '9') |
289 |
rept = rept*10 + com - '0'; |
290 |
if (rept == 0) rept = 1; |
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command(DJC); /* disable cursor */ |
292 |
switch (com) { |
293 |
case '\r': |
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case '\n': |
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case 'l': |
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case 'L': |
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case 'c': |
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case 'C': |
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case 'p': |
300 |
case 'P': |
301 |
case '=': |
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aedgetcap(&x, &y); /* get cursor position */ |
303 |
y = ymax-1-y; |
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if (y < 0 || scanpos[y] == -1) /* off picture? */ |
305 |
break; |
306 |
/* get value */ |
307 |
setcolor(cval, 0.0, 0.0, 0.0); |
308 |
for (j = rept-1; j >= 0; j--) { |
309 |
if (y+j >= NROWS || scanpos[y+j] == -1) |
310 |
continue; |
311 |
getscan(y+j); |
312 |
for (i = 0; i < rept; i++) |
313 |
if (x+i < xmax) { |
314 |
colr_color(ctmp, scanline[x+i]); |
315 |
addcolor(cval, ctmp); |
316 |
} |
317 |
} |
318 |
scalecolor(cval, 1.0/(rept*rept)); |
319 |
/* print value */ |
320 |
command(SEC); |
321 |
byte(scanline[(x+20)%xmax][EXP] >= COLXS ? BLK : WHT); |
322 |
byte(END); |
323 |
switch (com) { |
324 |
case '\r': |
325 |
case '\n': |
326 |
printf("%-3g", intens(cval)/exposure); |
327 |
break; |
328 |
case 'l': |
329 |
case 'L': |
330 |
printf("%-3gL", luminance(cval)/exposure); |
331 |
break; |
332 |
case 'c': |
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case 'C': |
334 |
printf("(%.2f,%.2f,%.2f)", |
335 |
colval(cval,RED), |
336 |
colval(cval,GRN), |
337 |
colval(cval,BLU)); |
338 |
break; |
339 |
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 |
register int i; |
412 |
/* read scanline */ |
413 |
getscan(y); |
414 |
/* convert scanline */ |
415 |
normcolrs(scanline, xmax, 0); |
416 |
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 |
} |
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 |
val = pow((i+0.5)/256.0, 1.0/GAMMA) * 256.0; |
530 |
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 |
} |