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root/radiance/ray/src/util/xglaresrc.c
Revision: 2.3
Committed: Thu Mar 19 09:38:14 1992 UTC (32 years ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.2: +1 -4 lines
Log Message:
added vfork.h include

File Contents

# Content
1 /* Copyright (c) 1991 Regents of the University of California */
2
3 #ifndef lint
4 static char SCCSid[] = "$SunId$ LBL";
5 #endif
6
7 /*
8 * Circle sources in a displayed image.
9 *
10 * 18 Mar 1991 Greg Ward
11 */
12
13 #include "standard.h"
14 #include "view.h"
15 #include "resolu.h"
16 #include "vfork.h"
17 #include <signal.h>
18 #include <X11/Xlib.h>
19 #include <X11/Xutil.h>
20
21 #define XIM "ximage"
22
23 #define NSEG 30 /* number of segments per circle */
24
25 #define FONTNAME "8x13" /* text font we'll use */
26
27 float col[3] = {1.,0.,0.}; /* color */
28
29 VIEW ourview = STDVIEW; /* view for picture */
30 RESOLU pres; /* picture resolution */
31
32 char *progname; /* program name */
33
34 Display *theDisplay = NULL; /* connection to server */
35
36 #define rwind RootWindow(theDisplay,ourScreen)
37 #define ourScreen DefaultScreen(theDisplay)
38
39 GC vecGC, strGC;
40 Window gwind;
41
42
43 main(argc, argv)
44 int argc;
45 char *argv[];
46 {
47 char *windowname = NULL;
48 FILE *fp;
49
50 progname = *argv++; argc--;
51 while (argc > 0 && argv[0][0] == '-') {
52 switch (argv[0][1]) {
53 case 'n':
54 windowname = *++argv;
55 argc--;
56 break;
57 case 'c':
58 col[0] = atof(*++argv);
59 col[1] = atof(*++argv);
60 col[2] = atof(*++argv);
61 argc -= 3;
62 break;
63 }
64 argv++; argc--;
65 }
66 if (argc < 1 || argc > 2) {
67 fprintf(stderr,
68 "Usage: %s [-n windowname][-c color] picture [glaresrc]\n",
69 progname);
70 exit(1);
71 }
72 init(argv[0], windowname);
73 if (argc < 2)
74 fp = stdin;
75 else if ((fp = fopen(argv[1], "r")) == NULL) {
76 fprintf(stderr, "%s: cannot open \"%s\"\n", progname, argv[1]);
77 exit(1);
78 }
79 circle_sources(fp);
80 exit(0);
81 }
82
83
84 init(pname, wname) /* get view and find window */
85 char *pname, *wname;
86 {
87 extern Window xfindwind();
88 XWindowAttributes wa;
89 XColor xc;
90 XGCValues gcv;
91 /* get the viewing parameters */
92 if (viewfile(pname, &ourview, &pres) <= 0 ||
93 setview(&ourview) != NULL) {
94 fprintf(stderr, "%s: cannot get view from \"%s\"\n",
95 progname, pname);
96 exit(1);
97 }
98 /* open the display */
99 if ((theDisplay = XOpenDisplay(NULL)) == NULL) {
100 fprintf(stderr,
101 "%s: cannot open display; DISPLAY variable set?\n",
102 progname);
103 exit(1);
104 }
105 /* find our window */
106 if (wname == NULL)
107 wname = pname;
108 gwind = xfindwind(theDisplay, rwind, wname, 2);
109 if (gwind == None) {
110 if (wname != pname) {
111 fprintf(stderr, "%s: cannot find \"%s\" window\n",
112 progname, wname);
113 exit(2);
114 }
115 /* start ximage */
116 if (vfork() == 0) {
117 execlp(XIM, XIM, pname, 0);
118 perror(XIM);
119 fprintf(stderr, "%s: cannot start %s\n",
120 progname, XIM);
121 kill(getppid(), SIGPIPE);
122 _exit(1);
123 }
124 do
125 sleep(8);
126 while ((gwind=xfindwind(theDisplay,rwind,pname,2)) == None);
127 } else
128 XMapRaised(theDisplay, gwind);
129 do {
130 XGetWindowAttributes(theDisplay, gwind, &wa);
131 sleep(6);
132 } while (wa.map_state != IsViewable);
133 if (wa.width != scanlen(&pres) || wa.height != numscans(&pres)) {
134 fprintf(stderr,
135 "%s: warning -- window seems to be the wrong size!\n",
136 progname);
137 if (pres.or & YMAJOR) {
138 pres.xr = wa.width;
139 pres.yr = wa.height;
140 } else {
141 pres.xr = wa.height;
142 pres.yr = wa.width;
143 }
144 }
145 /* set graphics context */
146 gcv.font = XLoadFont(theDisplay, FONTNAME);
147 if (gcv.font == 0) {
148 fprintf(stderr, "%s: cannot load font \"%s\"\n",
149 progname, FONTNAME);
150 exit(1);
151 }
152 xc.red = col[0] >= 1.0 ? 65535 : (unsigned)(65536*col[0]);
153 xc.green = col[1] >= 1.0 ? 65535 : (unsigned)(65536*col[1]);
154 xc.blue = col[2] >= 1.0 ? 65535 : (unsigned)(65536*col[2]);
155 xc.flags = DoRed|DoGreen|DoBlue;
156 gcv.background = xc.green >= 32768 ?
157 BlackPixel(theDisplay,DefaultScreen(theDisplay)) :
158 WhitePixel(theDisplay,DefaultScreen(theDisplay)) ;
159 if (XAllocColor(theDisplay, wa.colormap, &xc)) {
160 gcv.foreground = xc.pixel;
161 vecGC = XCreateGC(theDisplay,gwind,
162 GCForeground|GCBackground|GCFont,&gcv);
163 strGC = vecGC;
164 } else {
165 gcv.function = GXinvert;
166 vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv);
167 gcv.foreground = xc.green < 32768 ?
168 BlackPixel(theDisplay,DefaultScreen(theDisplay)) :
169 WhitePixel(theDisplay,DefaultScreen(theDisplay)) ;
170 strGC = XCreateGC(theDisplay,gwind,
171 GCForeground|GCBackground|GCFont,&gcv);
172 }
173 }
174
175
176 circle_sources(fp) /* circle sources listed in fp */
177 FILE *fp;
178 {
179 char linbuf[256];
180 int reading = 0;
181 FVECT dir;
182 double dom, lum;
183
184 while (fgets(linbuf, sizeof(linbuf), fp) != NULL)
185 if (reading) {
186 if (!strncmp(linbuf, "END", 3)) {
187 XFlush(theDisplay);
188 return;
189 }
190 if (sscanf(linbuf, "%lf %lf %lf %lf %lf",
191 &dir[0], &dir[1], &dir[2],
192 &dom, &lum) != 5)
193 break;
194 circle(dir, dom);
195 value(dir, lum);
196 } else if (!strcmp(linbuf, "BEGIN glare source\n"))
197 reading++;
198
199 fprintf(stderr, "%s: error reading glare sources\n", progname);
200 exit(1);
201 }
202
203
204 circle(dir, dom) /* indicate a solid angle on image */
205 FVECT dir;
206 double dom;
207 {
208 FVECT start, cur;
209 XPoint pt[NSEG+1];
210 FVECT pp;
211 int ip[2];
212 register int i;
213
214 fcross(cur, dir, ourview.vup);
215 if (normalize(cur) == 0.0)
216 goto fail;
217 spinvector(start, dir, cur, acos(1.-dom/(2.*PI)));
218 for (i = 0; i <= NSEG; i++) {
219 spinvector(cur, start, dir, 2.*PI*i/NSEG);
220 cur[0] += ourview.vp[0];
221 cur[1] += ourview.vp[1];
222 cur[2] += ourview.vp[2];
223 viewloc(pp, &ourview, cur);
224 if (pp[2] <= 0.0)
225 goto fail;
226 loc2pix(ip, &pres, pp[0], pp[1]);
227 pt[i].x = ip[0];
228 pt[i].y = ip[1];
229 }
230 XDrawLines(theDisplay, gwind, vecGC, pt, NSEG+1, CoordModeOrigin);
231 return;
232 fail:
233 fprintf(stderr, "%s: cannot draw source at (%f,%f,%f)\n",
234 progname, dir[0], dir[1], dir[2]);
235 }
236
237
238 value(dir, v) /* print value on image */
239 FVECT dir;
240 double v;
241 {
242 FVECT pos;
243 FVECT pp;
244 int ip[2];
245 char buf[32];
246
247 pos[0] = ourview.vp[0] + dir[0];
248 pos[1] = ourview.vp[1] + dir[1];
249 pos[2] = ourview.vp[2] + dir[2];
250 viewloc(pp, &ourview, pos);
251 if (pp[2] <= 0.0)
252 return;
253 loc2pix(ip, &pres, pp[0], pp[1]);
254 sprintf(buf, "%.0f", v);
255 XDrawImageString(theDisplay, gwind, strGC,
256 ip[0], ip[1], buf, strlen(buf));
257 }