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/* Copyright (c) 1987 Regents of the University of California */
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| 2 |
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| 3 |
#ifndef lint
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| 4 |
static char SCCSid[] = "$SunId$ LBL";
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| 5 |
#endif
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| 6 |
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| 7 |
/*
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| 8 |
* ximage.c - driver for X-windows
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| 9 |
*
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| 10 |
* 4/30/87
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| 11 |
* 3/3/88 Added calls to xraster & Paul Heckbert's ciq routines
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| 12 |
*/
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| 13 |
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| 14 |
#include "standard.h"
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| 16 |
#include <X/Xlib.h>
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| 17 |
#include <X/cursors/bcross.cursor>
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| 18 |
#include <X/cursors/bcross_mask.cursor>
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| 19 |
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| 20 |
#include <sys/types.h>
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| 21 |
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| 22 |
#include <ctype.h>
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| 23 |
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| 24 |
#include "color.h"
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| 25 |
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| 26 |
#include "xraster.h"
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| 27 |
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| 28 |
#include "view.h"
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| 29 |
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| 30 |
#include "pic.h"
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| 31 |
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| 32 |
#define controlshift(e) (((XButtonEvent *)(e))->detail & (ShiftMask|ControlMask))
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| 33 |
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| 34 |
#define FONTNAME "9x15" /* text font we'll use */
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| 35 |
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| 36 |
#define CTRL(c) ('c'-'@')
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| 37 |
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| 38 |
#define BORWIDTH 5 /* border width */
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| 39 |
#define BARHEIGHT 25 /* menu bar size */
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| 40 |
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| 41 |
double gamcor = 2.0; /* gamcor correction */
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| 42 |
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| 43 |
XRASTER ourras; /* our stored raster image */
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| 44 |
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| 45 |
int dither = 1; /* dither colors? */
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| 46 |
int fast = 0; /* keep picture in Pixmap? */
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| 47 |
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| 48 |
Window wind = 0; /* our output window */
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| 49 |
Font fontid; /* our font */
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| 50 |
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| 51 |
int maxcolors = 0; /* maximum colors */
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| 52 |
int greyscale = 0; /* in grey */
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| 53 |
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| 54 |
int xoff = 0; /* x image offset */
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| 55 |
int yoff = 0; /* y image offset */
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| 56 |
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| 57 |
VIEW ourview = STDVIEW(0); /* image view parameters */
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| 58 |
int gotview = 0; /* got parameters from file */
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| 59 |
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| 60 |
COLR *scanline; /* scan line buffer */
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| 61 |
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| 62 |
int xmax, ymax; /* picture resolution */
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int width, height; /* window size */
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| 64 |
char *fname = NULL; /* input file name */
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| 65 |
FILE *fin = stdin; /* input file */
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| 66 |
long *scanpos = NULL; /* scan line positions in file */
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| 67 |
int cury = 0; /* current scan location */
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double exposure = 1.0; /* exposure compensation used */
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| 70 |
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| 71 |
struct {
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| 72 |
int xmin, ymin, xsiz, ysiz;
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| 73 |
} box = {0, 0, 0, 0}; /* current box */
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| 74 |
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| 75 |
char *geometry = NULL; /* geometry specification */
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char *progname;
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char errmsg[128];
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| 80 |
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extern long ftell();
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extern char *malloc(), *calloc();
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extern double atof();
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main(argc, argv)
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int argc;
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char *argv[];
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{
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int headline();
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int i;
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progname = argv[0];
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for (i = 1; i < argc; i++)
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| 98 |
if (argv[i][0] == '-')
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switch (argv[i][1]) {
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case 'c':
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| 101 |
maxcolors = atoi(argv[++i]);
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break;
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| 103 |
case 'b':
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greyscale = !greyscale;
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break;
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| 106 |
case 'm':
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maxcolors = 2;
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break;
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| 109 |
case 'd':
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dither = !dither;
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break;
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| 112 |
case 'f':
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fast = !fast;
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break;
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case 'g':
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gamcor = atof(argv[++i]);
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break;
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default:
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goto userr;
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| 120 |
}
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| 121 |
else if (argv[i][0] == '=')
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| 122 |
geometry = argv[i];
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| 123 |
else
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break;
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| 125 |
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| 126 |
if (argc-i == 1) {
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fname = argv[i];
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| 128 |
fin = fopen(fname, "r");
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if (fin == NULL) {
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| 130 |
sprintf(errmsg, "can't open file \"%s\"", fname);
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| 131 |
quiterr(errmsg);
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}
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| 133 |
} else
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goto userr;
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| 136 |
/* get header */
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| 137 |
getheader(fin, headline);
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| 138 |
/* get picture dimensions */
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| 139 |
if (fscanf(fin, "-Y %d +X %d\n", &ymax, &xmax) != 2)
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quiterr("bad picture size");
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/* set view parameters */
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if (gotview) {
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| 143 |
ourview.hresolu = xmax;
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| 144 |
ourview.vresolu = ymax;
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| 145 |
if (setview(&ourview) != NULL)
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gotview = 0;
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}
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| 148 |
if ((scanline = (COLR *)malloc(xmax*sizeof(COLR))) == NULL)
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quiterr("out of memory");
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| 150 |
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init(); /* get file and open window */
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| 152 |
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for ( ; ; )
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getevent(); /* main loop */
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userr:
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fprintf(stderr,
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"Usage: %s [=geometry][-b][-m][-d][-f][-c ncolors] file\n",
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| 158 |
progname);
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| 159 |
quit(1);
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}
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| 162 |
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headline(s) /* get relevant info from header */
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char *s;
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{
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static char *altname[] = {"rview","rpict","VIEW=",NULL};
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register char **an;
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| 169 |
if (!strncmp(s, "EXPOSURE=", 9))
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exposure *= atof(s+9);
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else
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for (an = altname; *an != NULL; an++)
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if (!strncmp(*an, s, strlen(*an))) {
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if (sscanview(&ourview, s+strlen(*an)) == 0)
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gotview++;
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return;
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}
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}
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char *
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sskip(s) /* skip a word */
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register char *s;
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{
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while (isspace(*s)) s++;
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while (*s && !isspace(*s)) s++;
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return(s);
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}
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init() /* get data and open window */
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{
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register int i;
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colormap ourmap;
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OpaqueFrame mainframe;
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char defgeom[32];
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if (fname != NULL) {
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scanpos = (long *)malloc(ymax*sizeof(long));
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if (scanpos == NULL)
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goto memerr;
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for (i = 0; i < ymax; i++)
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scanpos[i] = -1;
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}
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if (XOpenDisplay(NULL) == NULL)
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quiterr("can't open display; DISPLAY variable set?");
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#ifdef notdef
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if (DisplayWidth() - 2*BORWIDTH < xmax ||
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DisplayHeight() - 2*BORWIDTH - BARHEIGHT < ymax)
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quiterr("resolution mismatch");
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#endif
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if (maxcolors == 0) { /* get number of available colors */
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maxcolors = 1<<DisplayPlanes();
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if (maxcolors > 4) maxcolors -= 2;
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}
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ourras.width = xmax;
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ourras.height = ymax;
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/* store image */
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if (maxcolors <= 2) { /* monochrome */
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ourras.data.m = (unsigned short *)malloc(BitmapSize(xmax,ymax));
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if (ourras.data.m == NULL)
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goto memerr;
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getmono();
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} else {
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ourras.data.bz = (unsigned char *)malloc(BZPixmapSize(xmax,ymax));
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if (ourras.data.bz == NULL)
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goto memerr;
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if (greyscale)
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biq(dither,maxcolors,1,ourmap);
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else
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ciq(dither,maxcolors,1,ourmap);
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if (init_rcolors(&ourras, ourmap) == 0)
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goto memerr;
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}
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mainframe.bdrwidth = BORWIDTH;
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mainframe.border = WhitePixmap;
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mainframe.background = BlackPixmap;
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sprintf(defgeom, "=%dx%d+0+22", xmax, ymax);
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wind = XCreate("Radiance Image", progname, geometry, defgeom,
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&mainframe, 16, 16);
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if (wind == 0)
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quiterr("can't create window");
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width = mainframe.width;
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height = mainframe.height;
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fontid = XGetFont(FONTNAME);
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if (fontid == 0)
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quiterr("can't get font");
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XStoreName(wind, fname == NULL ? progname : fname);
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XDefineCursor(wind, XCreateCursor(bcross_width, bcross_height,
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bcross_bits, bcross_mask_bits,
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bcross_x_hot, bcross_y_hot,
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BlackPixel, WhitePixel, GXcopy));
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XSelectInput(wind, ButtonPressed|ButtonReleased|UnmapWindow
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|RightDownMotion|MiddleDownMotion|LeftDownMotion
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|KeyPressed|ExposeWindow|ExposeRegion);
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XMapWindow(wind);
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return;
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memerr:
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quiterr("out of memory");
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}
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quiterr(err) /* print message and exit */
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char *err;
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{
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if (err != NULL)
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fprintf(stderr, "%s: %s\n", progname, err);
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exit(err == NULL ? 0 : 1);
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}
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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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quit(code)
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int code;
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{
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exit(code);
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}
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| 286 |
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getevent() /* process the next event */
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{
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| 289 |
WindowInfo info;
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XEvent e;
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| 292 |
XNextEvent(&e);
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| 293 |
switch (e.type) {
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| 294 |
case KeyPressed:
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| 295 |
docom(&e);
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| 296 |
break;
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| 297 |
case ExposeWindow:
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| 298 |
XQueryWindow(wind, &info); /* in case resized */
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| 299 |
width = info.width;
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| 300 |
height = info.height;
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| 301 |
/* fall through */
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| 302 |
case ExposeRegion:
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| 303 |
fixwindow(&e);
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| 304 |
break;
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| 305 |
case UnmapWindow:
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| 306 |
unmap_rcolors(&ourras);
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| 307 |
break;
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| 308 |
case ButtonPressed:
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| 309 |
if (controlshift(&e))
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| 310 |
moveimage(&e);
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| 311 |
else
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| 312 |
getbox(&e);
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| 313 |
break;
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| 314 |
}
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| 315 |
}
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| 316 |
|
| 317 |
|
| 318 |
fixwindow(eexp) /* fix new or stepped-on window */
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| 319 |
XExposeEvent *eexp;
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| 320 |
{
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| 321 |
redraw(eexp->x, eexp->y, eexp->width, eexp->height);
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| 322 |
}
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| 323 |
|
| 324 |
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| 325 |
redraw(x, y, w, h) /* redraw section of window */
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| 326 |
int x, y;
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| 327 |
int w, h;
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| 328 |
{
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| 329 |
map_rcolors(&ourras);
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| 330 |
if (fast)
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| 331 |
make_rpixmap(&ourras);
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| 332 |
return(patch_raster(wind,x-xoff,y-yoff,x,y,w,h,&ourras) ? 0 : -1);
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}
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| 334 |
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| 335 |
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| 336 |
docom(ekey) /* execute command */
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| 337 |
XKeyEvent *ekey;
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| 338 |
{
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| 339 |
char buf[80];
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| 340 |
COLOR cval;
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| 341 |
char *cp;
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| 342 |
int n;
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| 343 |
FVECT rorg, rdir;
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| 344 |
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| 345 |
cp = XLookupMapping(ekey, &n);
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| 346 |
if (n == 0)
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| 347 |
return(0);
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| 348 |
switch (*cp) { /* interpret command */
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| 349 |
case 'q':
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| 350 |
case CTRL(D): /* quiterr */
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| 351 |
quit(0);
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| 352 |
case '\n':
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| 353 |
case '\r':
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| 354 |
case 'l':
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| 355 |
case 'c': /* value */
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| 356 |
if (avgbox(cval) == -1)
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| 357 |
return(-1);
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| 358 |
switch (*cp) {
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| 359 |
case '\n':
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| 360 |
case '\r': /* radiance */
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| 361 |
sprintf(buf, "%-3g", intens(cval)/exposure);
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| 362 |
break;
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| 363 |
case 'l': /* luminance */
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| 364 |
sprintf(buf, "%-3gL", bright(cval)*683.0/exposure);
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| 365 |
break;
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| 366 |
case 'c': /* color */
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| 367 |
sprintf(buf, "(%.2f,%.2f,%.2f)",
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| 368 |
colval(cval,RED),
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| 369 |
colval(cval,GRN),
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| 370 |
colval(cval,BLU));
|
| 371 |
break;
|
| 372 |
}
|
| 373 |
XText(wind, box.xmin, box.ymin, buf, strlen(buf),
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| 374 |
fontid, BlackPixel, WhitePixel);
|
| 375 |
return(0);
|
| 376 |
case 'p': /* position */
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| 377 |
sprintf(buf, "(%d,%d)", ekey->x-xoff, ymax-1-ekey->y+yoff);
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| 378 |
XText(wind, ekey->x, ekey->y, buf, strlen(buf),
|
| 379 |
fontid, BlackPixel, WhitePixel);
|
| 380 |
return(0);
|
| 381 |
case 't': /* trace */
|
| 382 |
if (!gotview) {
|
| 383 |
XFeep(0);
|
| 384 |
return(-1);
|
| 385 |
}
|
| 386 |
rayview(rorg, rdir, &ourview,
|
| 387 |
ekey->x-xoff + .5, ymax-1-ekey->y+yoff + .5);
|
| 388 |
printf("%e %e %e ", rorg[0], rorg[1], rorg[2]);
|
| 389 |
printf("%e %e %e\n", rdir[0], rdir[1], rdir[2]);
|
| 390 |
fflush(stdout);
|
| 391 |
return(0);
|
| 392 |
case CTRL(R): /* redraw */
|
| 393 |
XClear(wind);
|
| 394 |
return(redraw(0, 0, width, height));
|
| 395 |
case ' ': /* clear */
|
| 396 |
return(redraw(box.xmin, box.ymin, box.xsiz, box.ysiz));
|
| 397 |
default:
|
| 398 |
XFeep(0);
|
| 399 |
return(-1);
|
| 400 |
}
|
| 401 |
}
|
| 402 |
|
| 403 |
|
| 404 |
moveimage(ep) /* shift the image */
|
| 405 |
XButtonEvent *ep;
|
| 406 |
{
|
| 407 |
XButtonEvent eb;
|
| 408 |
|
| 409 |
XMaskEvent(ButtonReleased, &eb);
|
| 410 |
xoff += eb.x - ep->x;
|
| 411 |
yoff += eb.y - ep->y;
|
| 412 |
XClear(wind);
|
| 413 |
return(redraw(0, 0, width, height));
|
| 414 |
}
|
| 415 |
|
| 416 |
|
| 417 |
getbox(ebut) /* get new box */
|
| 418 |
XButtonEvent *ebut;
|
| 419 |
{
|
| 420 |
union {
|
| 421 |
XEvent e;
|
| 422 |
XButtonEvent b;
|
| 423 |
XMouseMovedEvent m;
|
| 424 |
} e;
|
| 425 |
|
| 426 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e);
|
| 427 |
while (e.e.type == MouseMoved) {
|
| 428 |
revbox(ebut->x, ebut->y, box.xmin = e.m.x, box.ymin = e.m.y);
|
| 429 |
XMaskEvent(ButtonReleased|MouseMoved, &e.e);
|
| 430 |
revbox(ebut->x, ebut->y, box.xmin, box.ymin);
|
| 431 |
}
|
| 432 |
box.xmin = e.b.x<0 ? 0 : (e.b.x>=width ? width-1 : e.b.x);
|
| 433 |
box.ymin = e.b.y<0 ? 0 : (e.b.y>=height ? height-1 : e.b.y);
|
| 434 |
if (box.xmin > ebut->x) {
|
| 435 |
box.xsiz = box.xmin - ebut->x + 1;
|
| 436 |
box.xmin = ebut->x;
|
| 437 |
} else {
|
| 438 |
box.xsiz = ebut->x - box.xmin + 1;
|
| 439 |
}
|
| 440 |
if (box.ymin > ebut->y) {
|
| 441 |
box.ysiz = box.ymin - ebut->y + 1;
|
| 442 |
box.ymin = ebut->y;
|
| 443 |
} else {
|
| 444 |
box.ysiz = ebut->y - box.ymin + 1;
|
| 445 |
}
|
| 446 |
}
|
| 447 |
|
| 448 |
|
| 449 |
revbox(x0, y0, x1, y1) /* draw box with reversed lines */
|
| 450 |
int x0, y0, x1, y1;
|
| 451 |
{
|
| 452 |
XLine(wind, x0, y0, x1, y0, 1, 1, 0, GXinvert, AllPlanes);
|
| 453 |
XLine(wind, x0, y1, x1, y1, 1, 1, 0, GXinvert, AllPlanes);
|
| 454 |
XLine(wind, x0, y0, x0, y1, 1, 1, 0, GXinvert, AllPlanes);
|
| 455 |
XLine(wind, x1, y0, x1, y1, 1, 1, 0, GXinvert, AllPlanes);
|
| 456 |
}
|
| 457 |
|
| 458 |
|
| 459 |
avgbox(clr) /* average color over current box */
|
| 460 |
COLOR clr;
|
| 461 |
{
|
| 462 |
int left, right, top, bottom;
|
| 463 |
int y;
|
| 464 |
double d;
|
| 465 |
COLOR ctmp;
|
| 466 |
register int x;
|
| 467 |
|
| 468 |
setcolor(clr, 0.0, 0.0, 0.0);
|
| 469 |
left = box.xmin - xoff;
|
| 470 |
right = left + box.xsiz;
|
| 471 |
if (left < 0)
|
| 472 |
left = 0;
|
| 473 |
if (right > xmax)
|
| 474 |
right = xmax;
|
| 475 |
if (left >= right)
|
| 476 |
return(-1);
|
| 477 |
top = box.ymin - yoff;
|
| 478 |
bottom = top + box.ysiz;
|
| 479 |
if (top < 0)
|
| 480 |
top = 0;
|
| 481 |
if (bottom > ymax)
|
| 482 |
bottom = ymax;
|
| 483 |
if (top >= bottom)
|
| 484 |
return(-1);
|
| 485 |
for (y = top; y < bottom; y++) {
|
| 486 |
if (getscan(y) == -1)
|
| 487 |
return(-1);
|
| 488 |
for (x = left; x < right; x++) {
|
| 489 |
colr_color(ctmp, scanline[x]);
|
| 490 |
addcolor(clr, ctmp);
|
| 491 |
}
|
| 492 |
}
|
| 493 |
d = 1.0/((right-left)*(bottom-top));
|
| 494 |
scalecolor(clr, d);
|
| 495 |
return(0);
|
| 496 |
}
|
| 497 |
|
| 498 |
|
| 499 |
getmono() /* get monochrome data */
|
| 500 |
{
|
| 501 |
register unsigned short *dp;
|
| 502 |
register int x, err;
|
| 503 |
int y;
|
| 504 |
rgbpixel *inline;
|
| 505 |
short *cerr;
|
| 506 |
|
| 507 |
if ((inline = (rgbpixel *)malloc(xmax*sizeof(rgbpixel))) == NULL
|
| 508 |
|| (cerr = (short *)calloc(xmax,sizeof(short))) == NULL)
|
| 509 |
quit("out of memory in getmono");
|
| 510 |
dp = ourras.data.m - 1;
|
| 511 |
for (y = 0; y < ymax; y++) {
|
| 512 |
picreadline3(y, inline);
|
| 513 |
err = 0;
|
| 514 |
for (x = 0; x < xmax; x++) {
|
| 515 |
if (!(x&0xf))
|
| 516 |
*++dp = 0;
|
| 517 |
err += rgb_bright(&inline[x]) + cerr[x];
|
| 518 |
if (err > 127)
|
| 519 |
err -= 255;
|
| 520 |
else
|
| 521 |
*dp |= 1<<(x&0xf);
|
| 522 |
cerr[x] = err >>= 1;
|
| 523 |
}
|
| 524 |
}
|
| 525 |
free((char *)inline);
|
| 526 |
free((char *)cerr);
|
| 527 |
}
|
| 528 |
|
| 529 |
|
| 530 |
init_rcolors(xr, cmap) /* assign color values */
|
| 531 |
register XRASTER *xr;
|
| 532 |
colormap cmap;
|
| 533 |
{
|
| 534 |
register int i;
|
| 535 |
register unsigned char *p;
|
| 536 |
|
| 537 |
xr->pmap = (int *)malloc(256*sizeof(int));
|
| 538 |
if (xr->pmap == NULL)
|
| 539 |
return(0);
|
| 540 |
xr->cdefs = (Color *)malloc(256*sizeof(Color));
|
| 541 |
if (xr->cdefs == NULL)
|
| 542 |
return(0);
|
| 543 |
for (i = 0; i < 256; i++)
|
| 544 |
xr->pmap[i] = -1;
|
| 545 |
xr->ncolors = 0;
|
| 546 |
for (p = xr->data.bz, i = BZPixmapSize(xr->width,xr->height); i--; p++)
|
| 547 |
if (xr->pmap[*p] == -1) {
|
| 548 |
xr->cdefs[xr->ncolors].red = cmap[0][*p] << 8;
|
| 549 |
xr->cdefs[xr->ncolors].green = cmap[1][*p] << 8;
|
| 550 |
xr->cdefs[xr->ncolors].blue = cmap[2][*p] << 8;
|
| 551 |
xr->cdefs[xr->ncolors].pixel = *p;
|
| 552 |
xr->pmap[*p] = xr->ncolors++;
|
| 553 |
}
|
| 554 |
xr->cdefs = (Color *)realloc((char *)xr->cdefs, xr->ncolors*sizeof(Color));
|
| 555 |
if (xr->cdefs == NULL)
|
| 556 |
return(0);
|
| 557 |
return(1);
|
| 558 |
}
|
| 559 |
|
| 560 |
|
| 561 |
getscan(y)
|
| 562 |
int y;
|
| 563 |
{
|
| 564 |
if (y != cury) {
|
| 565 |
if (scanpos == NULL || scanpos[y] == -1)
|
| 566 |
return(-1);
|
| 567 |
if (fseek(fin, scanpos[y], 0) == -1)
|
| 568 |
quit("fseek error");
|
| 569 |
cury = y;
|
| 570 |
} else if (scanpos != NULL)
|
| 571 |
scanpos[y] = ftell(fin);
|
| 572 |
|
| 573 |
if (freadcolrs(scanline, xmax, fin) < 0)
|
| 574 |
quiterr("read error");
|
| 575 |
|
| 576 |
cury++;
|
| 577 |
return(0);
|
| 578 |
}
|
| 579 |
|
| 580 |
|
| 581 |
picreadline3(y, l3) /* read in 3-byte scanline */
|
| 582 |
int y;
|
| 583 |
register rgbpixel *l3;
|
| 584 |
{
|
| 585 |
register BYTE *l4;
|
| 586 |
register int shift, c;
|
| 587 |
int i;
|
| 588 |
|
| 589 |
if (getscan(y) < 0)
|
| 590 |
quiterr("cannot seek for picreadline");
|
| 591 |
/* convert scanline */
|
| 592 |
for (l4=scanline[0], i=xmax; i--; l4+=4, l3++) {
|
| 593 |
shift = l4[EXP] - COLXS;
|
| 594 |
if (shift >= 8) {
|
| 595 |
l3->r = l3->g = l3->b = 255;
|
| 596 |
} else if (shift <= -8) {
|
| 597 |
l3->r = l3->g = l3->b = 0;
|
| 598 |
} else if (shift > 0) {
|
| 599 |
c = l4[RED] << shift;
|
| 600 |
l3->r = c > 255 ? 255 : c;
|
| 601 |
c = l4[GRN] << shift;
|
| 602 |
l3->g = c > 255 ? 255 : c;
|
| 603 |
c = l4[BLU] << shift;
|
| 604 |
l3->b = c > 255 ? 255 : c;
|
| 605 |
} else if (shift < 0) {
|
| 606 |
l3->r = l4[RED] >> -shift;
|
| 607 |
l3->g = l4[GRN] >> -shift;
|
| 608 |
l3->b = l4[BLU] >> -shift;
|
| 609 |
} else {
|
| 610 |
l3->r = l4[RED];
|
| 611 |
l3->g = l4[GRN];
|
| 612 |
l3->b = l4[BLU];
|
| 613 |
}
|
| 614 |
}
|
| 615 |
}
|
| 616 |
|
| 617 |
|
| 618 |
picwriteline(y, l) /* add 8-bit scanline to image */
|
| 619 |
int y;
|
| 620 |
pixel *l;
|
| 621 |
{
|
| 622 |
bcopy(l, ourras.data.bz+BZPixmapSize(xmax,y), BZPixmapSize(xmax,1));
|
| 623 |
}
|
| 624 |
|
| 625 |
|
| 626 |
picreadcm(map) /* do gamcor correction */
|
| 627 |
colormap map;
|
| 628 |
{
|
| 629 |
extern double pow();
|
| 630 |
register int i, val;
|
| 631 |
|
| 632 |
for (i = 0; i < 256; i++) {
|
| 633 |
val = pow(i/256.0, 1.0/gamcor) * 256.0;
|
| 634 |
map[0][i] = map[1][i] = map[2][i] = val;
|
| 635 |
}
|
| 636 |
}
|
| 637 |
|
| 638 |
|
| 639 |
picwritecm(map) /* handled elsewhere */
|
| 640 |
colormap map;
|
| 641 |
{
|
| 642 |
}
|
