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#ifndef lint |
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static const char RCSid[] = "$Id: xglaresrc.c,v 2.13 2025/06/03 21:31:51 greg Exp $"; |
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#endif |
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/* |
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* Circle sources in a displayed image. |
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* |
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* 18 Mar 1991 Greg Ward |
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*/ |
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|
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#include "standard.h" |
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#include "paths.h" |
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|
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#include <signal.h> |
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#include <X11/Xlib.h> |
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#include <X11/Xutil.h> |
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|
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#include "view.h" |
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|
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#define XIM "ximage" |
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|
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#define NSEG 30 /* number of segments per circle */ |
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|
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#define FONTNAME "8x13" /* text font we'll use */ |
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|
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float col[3] = {1.,0.,0.}; /* color */ |
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|
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VIEW ourview = STDVIEW; /* view for picture */ |
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RESOLU pres; /* picture resolution */ |
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|
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Display *theDisplay = NULL; /* connection to server */ |
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|
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#define rwind RootWindow(theDisplay,ourScreen) |
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#define ourScreen DefaultScreen(theDisplay) |
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|
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GC vecGC, strGC; |
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Window gwind; |
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|
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static void init(char *pname, char *wname); |
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static void circle_sources(FILE *fp); |
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static void circle(FVECT dir, double dom); |
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static void value(FVECT dir, double v); |
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|
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|
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int |
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main( |
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int argc, |
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char *argv[] |
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) |
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{ |
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char *windowname = NULL; |
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FILE *fp; |
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|
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fixargv0(*argv++); argc--; |
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while (argc > 0 && argv[0][0] == '-') { |
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switch (argv[0][1]) { |
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case 'n': |
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windowname = *++argv; |
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argc--; |
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break; |
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case 'c': |
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col[0] = atof(*++argv); |
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col[1] = atof(*++argv); |
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col[2] = atof(*++argv); |
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argc -= 3; |
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break; |
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} |
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argv++; argc--; |
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} |
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if (argc < 1 || argc > 2) { |
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fprintf(stderr, |
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"Usage: %s [-n windowname][-c color] picture [glaresrc]\n", |
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progname); |
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exit(1); |
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} |
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init(argv[0], windowname); |
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if (argc < 2) |
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fp = stdin; |
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else if ((fp = fopen(argv[1], "r")) == NULL) { |
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fprintf(stderr, "%s: cannot open \"%s\"\n", progname, argv[1]); |
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exit(1); |
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} |
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circle_sources(fp); |
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exit(0); |
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} |
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|
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|
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static void |
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init( /* get view and find window */ |
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char *pname, |
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char *wname |
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) |
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{ |
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extern Window xfindwind(); |
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XWindowAttributes wa; |
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XColor xc; |
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XGCValues gcv; |
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register int i; |
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/* get the viewing parameters */ |
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if (viewfile(pname, &ourview, &pres) <= 0 || |
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setview(&ourview) != NULL) { |
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fprintf(stderr, "%s: cannot get view from \"%s\"\n", |
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progname, pname); |
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exit(1); |
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} |
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/* open the display */ |
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if ((theDisplay = XOpenDisplay(NULL)) == NULL) { |
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fprintf(stderr, |
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"%s: cannot open display; DISPLAY variable set?\n", |
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progname); |
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exit(1); |
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} |
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/* find our window */ |
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if (wname == NULL) { |
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/* remove directory prefix from name */ |
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for (i = strlen(pname); i-- > 0; ) |
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if (pname[i] == '/') |
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break; |
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wname = pname+i+1; |
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i = 0; |
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} else |
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i = 1; |
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gwind = xfindwind(theDisplay, rwind, wname, 4); |
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if (gwind == None) { |
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if (i) { |
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fprintf(stderr, "%s: cannot find \"%s\" window\n", |
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progname, wname); |
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exit(2); |
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} |
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/* start ximage */ |
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if (fork() == 0) { |
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execlp(XIM, XIM, "-c", "256", pname, 0); |
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perror(XIM); |
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fprintf(stderr, "%s: cannot start %s\n", |
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progname, XIM); |
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kill(getppid(), SIGPIPE); |
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_exit(1); |
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} |
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do |
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sleep(8); |
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while ((gwind=xfindwind(theDisplay,rwind,wname,4)) == None); |
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} else |
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XMapRaised(theDisplay, gwind); |
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do { |
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XGetWindowAttributes(theDisplay, gwind, &wa); |
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sleep(6); |
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} while (wa.map_state != IsViewable); |
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if (wa.width != scanlen(&pres) || wa.height != numscans(&pres)) { |
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fprintf(stderr, |
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"%s: warning -- window seems to be the wrong size!\n", |
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progname); |
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if (pres.rt & YMAJOR) { |
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pres.xr = wa.width; |
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pres.yr = wa.height; |
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} else { |
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pres.xr = wa.height; |
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pres.yr = wa.width; |
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} |
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} |
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/* set graphics context */ |
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gcv.font = XLoadFont(theDisplay, FONTNAME); |
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if (gcv.font == 0) { |
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fprintf(stderr, "%s: cannot load font \"%s\"\n", |
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progname, FONTNAME); |
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exit(1); |
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} |
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xc.red = col[0] >= 1.0 ? 65535 : (unsigned)(65536*col[0]); |
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xc.green = col[1] >= 1.0 ? 65535 : (unsigned)(65536*col[1]); |
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xc.blue = col[2] >= 1.0 ? 65535 : (unsigned)(65536*col[2]); |
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xc.flags = DoRed|DoGreen|DoBlue; |
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gcv.background = xc.green >= 32768 ? |
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BlackPixel(theDisplay,DefaultScreen(theDisplay)) : |
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WhitePixel(theDisplay,DefaultScreen(theDisplay)) ; |
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if (XAllocColor(theDisplay, wa.colormap, &xc)) { |
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gcv.foreground = xc.pixel; |
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vecGC = XCreateGC(theDisplay,gwind, |
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GCForeground|GCBackground|GCFont,&gcv); |
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strGC = vecGC; |
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} else { |
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gcv.function = GXinvert; |
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vecGC = XCreateGC(theDisplay,gwind,GCFunction,&gcv); |
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gcv.foreground = xc.green < 32768 ? |
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BlackPixel(theDisplay,DefaultScreen(theDisplay)) : |
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WhitePixel(theDisplay,DefaultScreen(theDisplay)) ; |
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strGC = XCreateGC(theDisplay,gwind, |
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GCForeground|GCBackground|GCFont,&gcv); |
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} |
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} |
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|
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|
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static void |
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circle_sources( /* circle sources listed in fp */ |
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FILE *fp |
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) |
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{ |
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char linbuf[256]; |
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int reading = 0; |
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FVECT dir; |
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double dom, lum; |
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|
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while (fgets(linbuf, sizeof(linbuf), fp) != NULL) |
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if (reading) { |
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if (!strncmp(linbuf, "END", 3)) { |
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XFlush(theDisplay); |
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return; |
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} |
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if (sscanf(linbuf, FVFORMAT, |
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&dir[0], &dir[1], &dir[2]) != 3 || |
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sscanf(sskip2(linbuf, 3), "%lf %lf", |
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&dom, &lum) != 2) |
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break; |
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circle(dir, dom); |
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value(dir, lum); |
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} else if (!strcmp(linbuf, "BEGIN glare source\n")) |
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reading++; |
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|
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fprintf(stderr, "%s: error reading glare sources\n", progname); |
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exit(1); |
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} |
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|
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|
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static void |
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circle( /* indicate a solid angle on image */ |
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FVECT dir, |
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double dom |
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) |
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{ |
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FVECT start, cur; |
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XPoint pt[NSEG+1]; |
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FVECT pp; |
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int ip[2]; |
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register int i; |
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|
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fcross(cur, dir, ourview.vup); |
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if (normalize(cur) == 0.0) |
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goto fail; |
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spinvector(start, dir, cur, acos(1.-dom/(2.*PI))); |
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for (i = 0; i <= NSEG; i++) { |
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spinvector(cur, start, dir, 2.*PI*i/NSEG); |
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cur[0] += ourview.vp[0]; |
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cur[1] += ourview.vp[1]; |
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cur[2] += ourview.vp[2]; |
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if (viewloc(pp, &ourview, cur) != VL_GOOD) |
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goto fail; |
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loc2pix(ip, &pres, pp[0], pp[1]); |
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pt[i].x = ip[0]; |
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pt[i].y = ip[1]; |
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} |
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XDrawLines(theDisplay, gwind, vecGC, pt, NSEG+1, CoordModeOrigin); |
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return; |
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fail: |
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fprintf(stderr, "%s: cannot draw source at (%f,%f,%f)\n", |
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progname, dir[0], dir[1], dir[2]); |
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} |
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|
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|
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static void |
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value( /* print value on image */ |
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FVECT dir, |
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double v |
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) |
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{ |
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FVECT pos; |
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FVECT pp; |
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int ip[2]; |
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char buf[32]; |
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|
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pos[0] = ourview.vp[0] + dir[0]; |
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pos[1] = ourview.vp[1] + dir[1]; |
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pos[2] = ourview.vp[2] + dir[2]; |
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if (viewloc(pp, &ourview, pos) != VL_GOOD) |
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return; |
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loc2pix(ip, &pres, pp[0], pp[1]); |
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sprintf(buf, "%.0f", v); |
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XDrawImageString(theDisplay, gwind, strGC, |
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ip[0], ip[1], buf, strlen(buf)); |
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} |
