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root/radiance/ray/src/hd/rhd_x11.c
Revision: 3.22
Committed: Sun Jan 4 08:32:01 1998 UTC (26 years, 2 months ago) by gregl
Content type: text/plain
Branch: MAIN
Changes since 3.21: +1 -0 lines
Log Message:
delay update after ^L

File Contents

# User Rev Content
1 gregl 3.1 /* Copyright (c) 1997 Silicon Graphics, Inc. */
2    
3     #ifndef lint
4     static char SCCSid[] = "$SunId$ SGI";
5     #endif
6    
7     /*
8     * X11 driver for holodeck display.
9     * Based on rview driver.
10     */
11    
12     #include "standard.h"
13     #include "rhd_qtree.h"
14    
15     #include <X11/Xlib.h>
16     #include <X11/cursorfont.h>
17     #include <X11/Xutil.h>
18    
19     #include "x11icon.h"
20    
21 gregl 3.20 #ifndef RAYQLEN
22     #define RAYQLEN 50000 /* max. rays to queue before flush */
23     #endif
24    
25 gregl 3.11 #ifndef FEQ
26     #define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY)
27     #endif
28    
29 gregl 3.1 #define GAMMA 2.2 /* default gamma correction */
30    
31 gregl 3.13 #define MOVPCT 7 /* percent distance to move /frame */
32 gregl 3.2 #define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)
33 gregl 3.13 #define MOVDEG (-5) /* degrees to orbit CW/down /frame */
34     #define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0)
35 gregl 3.2
36 gregl 3.1 #define MINWIDTH 480 /* minimum graphics window width */
37     #define MINHEIGHT 400 /* minimum graphics window height */
38    
39     #define VIEWDIST 356 /* assumed viewing distance (mm) */
40    
41     #define BORWIDTH 5 /* border width */
42    
43     #define ourscreen DefaultScreen(ourdisplay)
44     #define ourroot RootWindow(ourdisplay,ourscreen)
45     #define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\
46 gregl 3.2 ButtonPressMask|ButtonReleaseMask)
47 gregl 3.1
48     #define levptr(etype) ((etype *)&currentevent)
49    
50     struct driver odev; /* global device driver structure */
51    
52     static XEvent currentevent; /* current event */
53    
54     static int ncolors = 0; /* color table size */
55     static int mapped = 0; /* window is mapped? */
56     static unsigned long *pixval = NULL; /* allocated pixels */
57     static unsigned long ourblack=0, ourwhite=1;
58    
59     static Display *ourdisplay = NULL; /* our display */
60     static XVisualInfo ourvinfo; /* our visual information */
61     static Window gwind = 0; /* our graphics window */
62     static GC ourgc = 0; /* our graphics context for drawing */
63     static Colormap ourmap = 0; /* our color map */
64    
65     static double pwidth, pheight; /* pixel dimensions (mm) */
66    
67     static int inpresflags; /* input result flags */
68    
69 gregl 3.2 static int headlocked = 0; /* lock vertical motion */
70 gregl 3.1
71     static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
72 gregl 3.2 getevent(), getkey(), moveview(), getmove(), fixwindow();
73 gregl 3.1 static unsigned long true_pixel();
74    
75    
76     static int
77     mytmflags() /* figure out tone mapping flags */
78     {
79     extern char *progname;
80     register char *cp, *tail;
81     /* find basic name */
82     for (cp = tail = progname; *cp; cp++)
83     if (*cp == '/')
84     tail = cp+1;
85     for (cp = tail; *cp && *cp != '.'; cp++)
86     ;
87     if (cp-tail == 3 && !strncmp(tail, "x11", 3))
88 gregl 3.20 return(TM_F_CAMERA|TM_F_NOSTDERR);
89 gregl 3.1 if (cp-tail == 4 && !strncmp(tail, "x11h", 4))
90 gregl 3.20 return(TM_F_HUMAN|TM_F_NOSTDERR);
91 gregl 3.1 error(USER, "illegal driver name");
92     }
93    
94    
95     dev_open(id) /* initialize X11 driver */
96     char *id;
97     {
98     extern char *getenv();
99     char *gv;
100     double gamval = GAMMA;
101     int nplanes;
102     XSetWindowAttributes ourwinattr;
103     XWMHints ourxwmhints;
104     XSizeHints oursizhints;
105 gregl 3.2 /* set quadtree globals */
106 gregl 3.4 qtMinNodesiz = 2;
107 gregl 3.1 /* open display server */
108     ourdisplay = XOpenDisplay(NULL);
109     if (ourdisplay == NULL)
110     error(USER, "cannot open X-windows; DISPLAY variable set?\n");
111     /* find a usable visual */
112     nplanes = DisplayPlanes(ourdisplay, ourscreen);
113     if (XMatchVisualInfo(ourdisplay,ourscreen,
114     nplanes>12?nplanes:24,TrueColor,&ourvinfo) ||
115     XMatchVisualInfo(ourdisplay,ourscreen,
116     nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
117     ourblack = 0;
118     ourwhite = ourvinfo.red_mask |
119     ourvinfo.green_mask |
120     ourvinfo.blue_mask ;
121     } else {
122     if (nplanes < 4)
123     error(INTERNAL, "not enough colors\n");
124     if (!XMatchVisualInfo(ourdisplay,ourscreen,
125     nplanes,PseudoColor,&ourvinfo) &&
126     !XMatchVisualInfo(ourdisplay,ourscreen,
127     nplanes,GrayScale,&ourvinfo))
128     error(INTERNAL, "unsupported visual type\n");
129     ourblack = BlackPixel(ourdisplay,ourscreen);
130     ourwhite = WhitePixel(ourdisplay,ourscreen);
131     }
132     /* set gamma and tone mapping */
133     if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
134     || (gv = getenv("DISPLAY_GAMMA")) != NULL)
135     gamval = atof(gv);
136     if (tmInit(mytmflags(), stdprims, gamval) == NULL)
137     error(SYSTEM, "not enough memory in dev_open");
138     /* open window */
139     ourwinattr.background_pixel = ourblack;
140     ourwinattr.border_pixel = ourblack;
141     ourwinattr.event_mask = ourmask;
142     /* this is stupid */
143     ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
144     ourvinfo.visual, AllocNone);
145     gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
146     DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
147     DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
148     BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
149     CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr);
150     if (gwind == 0)
151     error(SYSTEM, "cannot create window\n");
152     XStoreName(ourdisplay, gwind, id);
153     /* get graphics context */
154     ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
155     /* set window manager hints */
156     ourxwmhints.flags = InputHint|IconPixmapHint;
157     ourxwmhints.input = True;
158     ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
159     gwind, x11icon_bits, x11icon_width, x11icon_height);
160     XSetWMHints(ourdisplay, gwind, &ourxwmhints);
161     oursizhints.min_width = MINWIDTH;
162     oursizhints.min_height = MINHEIGHT;
163     oursizhints.flags = PMinSize;
164     XSetNormalHints(ourdisplay, gwind, &oursizhints);
165 gregl 3.18 /* figure out sensible view */
166     pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
167     DisplayWidth(ourdisplay, ourscreen);
168     pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
169     DisplayHeight(ourdisplay, ourscreen);
170     copystruct(&odev.v, &stdview);
171     odev.v.type = VT_PER;
172 gregl 3.1 /* map the window and get its size */
173     XMapWindow(ourdisplay, gwind);
174 gregl 3.18 dev_input(); /* sets size and view angles */
175 gregl 3.2 /* allocate our leaf pile */
176     if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) *
177 gregl 3.21 DisplayHeight(ourdisplay,ourscreen) * 3 /
178     (qtMinNodesiz*qtMinNodesiz*2)))
179 gregl 3.2 error(SYSTEM, "insufficient memory for leaf storage");
180 gregl 3.1 odev.name = id;
181     odev.ifd = ConnectionNumber(ourdisplay);
182     }
183    
184    
185     dev_close() /* close our display */
186     {
187     freepixels();
188     XFreeGC(ourdisplay, ourgc);
189     XDestroyWindow(ourdisplay, gwind);
190     gwind = 0;
191     ourgc = 0;
192     XCloseDisplay(ourdisplay);
193     ourdisplay = NULL;
194     qtFreeLeaves();
195     tmDone(NULL);
196     odev.v.type = 0;
197     odev.hres = odev.vres = 0;
198     odev.ifd = -1;
199     }
200    
201    
202 gregl 3.13 int
203 gregl 3.1 dev_view(nv) /* assign new driver view */
204     VIEW *nv;
205     {
206 gregl 3.13 if (nv->type == VT_PAR || /* check view legality */
207 gregl 3.17 nv->horiz > 160. || nv->vert > 160.) {
208 gregl 3.13 error(COMMAND, "illegal view type/angle");
209     nv->type = VT_PER;
210     nv->horiz = odev.v.horiz;
211     nv->vert = odev.v.vert;
212     return(0);
213     }
214     if (nv->vfore > FTINY) {
215     error(COMMAND, "cannot handle fore clipping");
216     nv->vfore = 0.;
217     return(0);
218     }
219 gregl 3.11 if (nv != &odev.v) {
220     if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */
221     !FEQ(nv->vert,odev.v.vert)) {
222 gregl 3.13 int dw = DisplayWidth(ourdisplay,ourscreen);
223     int dh = DisplayHeight(ourdisplay,ourscreen);
224    
225     dw -= 25; /* for window frame */
226 gregl 3.16 dh -= 50;
227 gregl 3.12 odev.hres = 2.*VIEWDIST/pwidth *
228     tan(PI/180./2.*nv->horiz);
229     odev.vres = 2.*VIEWDIST/pheight *
230     tan(PI/180./2.*nv->vert);
231 gregl 3.13 if (odev.hres > dw) {
232     odev.vres = dw * odev.vres / odev.hres;
233     odev.hres = dw;
234     }
235     if (odev.vres > dh) {
236     odev.hres = dh * odev.hres / odev.vres;
237     odev.vres = dh;
238     }
239 gregl 3.11 XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres);
240 gregl 3.18 dev_input(); /* wait for resize event */
241 gregl 3.11 }
242 gregl 3.1 copystruct(&odev.v, nv);
243 gregl 3.11 }
244 gregl 3.1 qtReplant();
245 gregl 3.13 return(1);
246 gregl 3.1 }
247    
248    
249     int
250     dev_input() /* get X11 input */
251     {
252     inpresflags = 0;
253 gregl 3.5
254 gregl 3.1 do
255     getevent();
256    
257     while (XQLength(ourdisplay) > 0);
258    
259     return(inpresflags);
260     }
261    
262    
263     dev_paintr(rgb, xmin, ymin, xmax, ymax) /* fill a rectangle */
264     BYTE rgb[3];
265     int xmin, ymin, xmax, ymax;
266     {
267     unsigned long pixel;
268    
269     if (!mapped)
270     return;
271     if (ncolors > 0)
272     pixel = pixval[get_pixel(rgb, xnewcolr)];
273     else
274     pixel = true_pixel(rgb);
275     XSetForeground(ourdisplay, ourgc, pixel);
276     XFillRectangle(ourdisplay, gwind,
277     ourgc, xmin, odev.vres-ymax, xmax-xmin, ymax-ymin);
278     }
279    
280    
281     int
282     dev_flush() /* flush output */
283     {
284     qtUpdate();
285 gregl 3.20 rayqleft = RAYQLEN;
286 gregl 3.1 return(XPending(ourdisplay));
287     }
288    
289    
290     static
291     xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
292     int ndx;
293     int r, g, b;
294     {
295     XColor xcolor;
296    
297     xcolor.pixel = pixval[ndx];
298     xcolor.red = r << 8;
299     xcolor.green = g << 8;
300     xcolor.blue = b << 8;
301     xcolor.flags = DoRed|DoGreen|DoBlue;
302    
303     XStoreColor(ourdisplay, ourmap, &xcolor);
304     }
305    
306    
307     static int
308     getpixels() /* get the color map */
309     {
310     XColor thiscolor;
311     register int i, j;
312    
313     if (ncolors > 0)
314     return(ncolors);
315     if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
316     ourmap = DefaultColormap(ourdisplay,ourscreen);
317     goto loop;
318     }
319     newmap:
320     ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
321     loop:
322     for (ncolors = ourvinfo.colormap_size;
323     ncolors > ourvinfo.colormap_size/3;
324     ncolors = ncolors*.937) {
325     pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
326     if (pixval == NULL)
327     return(ncolors = 0);
328     if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
329     break;
330     free((char *)pixval);
331     pixval = NULL;
332     }
333     if (pixval == NULL) {
334     if (ourmap == DefaultColormap(ourdisplay,ourscreen))
335     goto newmap; /* try it with our map */
336     else
337     return(ncolors = 0); /* failed */
338     }
339     if (ourmap != DefaultColormap(ourdisplay,ourscreen))
340     for (i = 0; i < ncolors; i++) { /* reset black and white */
341     if (pixval[i] != ourblack && pixval[i] != ourwhite)
342     continue;
343     thiscolor.pixel = pixval[i];
344     thiscolor.flags = DoRed|DoGreen|DoBlue;
345     XQueryColor(ourdisplay,
346     DefaultColormap(ourdisplay,ourscreen),
347     &thiscolor);
348     XStoreColor(ourdisplay, ourmap, &thiscolor);
349     for (j = i; j+1 < ncolors; j++)
350     pixval[j] = pixval[j+1];
351     ncolors--;
352     i--;
353     }
354     XSetWindowColormap(ourdisplay, gwind, ourmap);
355     return(ncolors);
356     }
357    
358    
359     static
360     freepixels() /* free our pixels */
361     {
362     if (ncolors == 0)
363     return;
364     XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
365     free((char *)pixval);
366     pixval = NULL;
367     ncolors = 0;
368     if (ourmap != DefaultColormap(ourdisplay,ourscreen))
369     XFreeColormap(ourdisplay, ourmap);
370     ourmap = 0;
371     }
372    
373    
374     static unsigned long
375     true_pixel(rgb) /* return true pixel value for color */
376     register BYTE rgb[3];
377     {
378     register unsigned long rval;
379    
380     rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
381     rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
382     rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
383     return(rval);
384     }
385    
386    
387     static
388     getevent() /* get next event */
389     {
390     XNextEvent(ourdisplay, levptr(XEvent));
391     switch (levptr(XEvent)->type) {
392     case ConfigureNotify:
393     resizewindow(levptr(XConfigureEvent));
394     break;
395     case UnmapNotify:
396     mapped = 0;
397     freepixels();
398     break;
399     case MapNotify:
400     if (ourvinfo.class == PseudoColor ||
401     ourvinfo.class == GrayScale) {
402     if (getpixels() == 0)
403     error(SYSTEM, "cannot allocate colors\n");
404     new_ctab(ncolors);
405     }
406     mapped = 1;
407     break;
408     case Expose:
409     fixwindow(levptr(XExposeEvent));
410     break;
411     case KeyPress:
412     getkey(levptr(XKeyPressedEvent));
413     break;
414     case ButtonPress:
415 gregl 3.2 getmove(levptr(XButtonPressedEvent));
416 gregl 3.1 break;
417     }
418     }
419    
420    
421     static
422 gregl 3.9 ilclip(dp, wp) /* clip world coordinates to device */
423     int dp[2][2];
424     FVECT wp[2];
425     {
426     static FVECT vmin = {0.,0.,0.}, vmax = {1.,1.,FHUGE};
427     FVECT ip[2];
428     /* not exactly right, but who cares? */
429     viewloc(ip[0], &odev.v, wp[0]);
430     viewloc(ip[1], &odev.v, wp[1]);
431     if (!clip(ip[0], ip[1], vmin, vmax))
432     return(0);
433     dp[0][0] = ip[0][0]*odev.hres;
434     dp[0][1] = ip[0][1]*odev.vres;
435     dp[1][0] = ip[1][0]*odev.hres;
436     dp[1][1] = ip[1][1]*odev.vres;
437     return(1);
438     }
439    
440    
441     static
442     draw3dline(wp) /* draw 3d line in world coordinates */
443     FVECT wp[2];
444     {
445     int dp[2][2];
446    
447     if (!ilclip(dp, wp))
448     return;
449     XDrawLine(ourdisplay, gwind, ourgc,
450     dp[0][0], odev.vres-1 - dp[0][1],
451     dp[1][0], odev.vres-1 - dp[1][1]);
452     }
453    
454    
455     static
456     draw_grids() /* draw holodeck section grids */
457     {
458     static BYTE gridrgb[3] = {0x0, 0xff, 0xff};
459     unsigned long pixel;
460    
461 gregl 3.19 if (!mapped)
462 gregl 3.9 return;
463     if (ncolors > 0)
464     pixel = pixval[get_pixel(gridrgb, xnewcolr)];
465     else
466     pixel = true_pixel(gridrgb);
467     XSetForeground(ourdisplay, ourgc, pixel);
468     /* draw each grid line */
469     gridlines(draw3dline);
470     }
471    
472    
473     static
474 gregl 3.13 moveview(dx, dy, mov, orb) /* move our view */
475     int dx, dy, mov, orb;
476 gregl 3.2 {
477     VIEW nv;
478 gregl 3.17 FVECT odir, v1;
479 gregl 3.2 double d;
480 gregl 3.13 register int li;
481 gregl 3.2 /* start with old view */
482     copystruct(&nv, &odev.v);
483     /* change view direction */
484 gregl 3.13 if (mov | orb) {
485 gregl 3.4 if ((li = qtFindLeaf(dx, dy)) < 0)
486 gregl 3.2 return(0); /* not on window */
487 gregl 3.17 VSUM(odir, qtL.wp[li], nv.vp, -1.);
488 gregl 3.2 } else {
489     if (viewray(nv.vp, nv.vdir, &odev.v,
490     (dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
491     return(0); /* outside view */
492     }
493 gregl 3.13 if (orb && mov) { /* orbit left/right */
494 gregl 3.17 spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
495     VSUM(nv.vp, qtL.wp[li], odir, -1.);
496     spinvector(nv.vdir, nv.vdir, nv.vup, d);
497 gregl 3.13 } else if (orb) { /* orbit up/down */
498 gregl 3.17 fcross(v1, odir, nv.vup);
499 gregl 3.13 if (normalize(v1) == 0.)
500     return(0);
501 gregl 3.17 spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
502     VSUM(nv.vp, qtL.wp[li], odir, -1.);
503     spinvector(nv.vdir, nv.vdir, v1, d);
504 gregl 3.13 } else if (mov) { /* move forward/backward */
505     d = MOVPCT/100. * mov;
506 gregl 3.17 VSUM(nv.vp, nv.vp, odir, d);
507 gregl 3.2 }
508 gregl 3.13 if (!mov ^ !orb && headlocked) { /* restore head height */
509     VSUM(v1, odev.v.vp, nv.vp, -1.);
510     d = DOT(v1, odev.v.vup);
511     VSUM(nv.vp, nv.vp, odev.v.vup, d);
512     }
513 gregl 3.2 if (setview(&nv) != NULL)
514     return(0); /* illegal view */
515     dev_view(&nv);
516 gregl 3.14 inpresflags |= DFL(DC_SETVIEW);
517 gregl 3.2 return(1);
518     }
519    
520    
521     static
522     getmove(ebut) /* get view change */
523     XButtonPressedEvent *ebut;
524     {
525 gregl 3.13 int movdir = MOVDIR(ebut->button);
526     int movorb = MOVORB(ebut->state);
527 gregl 3.2 int oldnodesiz = qtMinNodesiz;
528     Window rootw, childw;
529     int rootx, rooty, wx, wy;
530     unsigned int statemask;
531    
532     qtMinNodesiz = 16; /* for quicker update */
533 gregl 3.9 XNoOp(ourdisplay);
534 gregl 3.2
535 gregl 3.9 while (!XCheckMaskEvent(ourdisplay,
536     ButtonReleaseMask, levptr(XEvent))) {
537    
538 gregl 3.2 if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
539     &rootx, &rooty, &wx, &wy, &statemask))
540     break; /* on another screen */
541    
542 gregl 3.13 if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
543 gregl 3.2 sleep(1);
544 gregl 3.9 continue;
545     }
546     XClearWindow(ourdisplay, gwind);
547     qtUpdate();
548     draw_grids();
549     }
550 gregl 3.14 if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
551 gregl 3.13 movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
552 gregl 3.2 wx = levptr(XButtonReleasedEvent)->x;
553     wy = levptr(XButtonReleasedEvent)->y;
554 gregl 3.13 moveview(wx, odev.vres-1-wy, movdir, movorb);
555 gregl 3.2 }
556 gregl 3.9 dev_flush();
557 gregl 3.2
558     qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */
559     }
560    
561    
562     static
563 gregl 3.1 getkey(ekey) /* get input key */
564     register XKeyPressedEvent *ekey;
565     {
566     int n;
567     char buf[8];
568    
569     n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
570     if (n != 1)
571     return;
572     switch (buf[0]) {
573     case 'h': /* turn on height motion lock */
574 gregl 3.2 headlocked = 1;
575 gregl 3.1 return;
576     case 'H': /* turn off height motion lock */
577 gregl 3.2 headlocked = 0;
578 gregl 3.13 return;
579     case 'l': /* retrieve last view */
580 gregl 3.14 inpresflags |= DFL(DC_LASTVIEW);
581 gregl 3.1 return;
582 gregl 3.2 case 'p': /* pause computation */
583 gregl 3.14 inpresflags |= DFL(DC_PAUSE);
584 gregl 3.2 return;
585 gregl 3.7 case 'v': /* spit out view */
586 gregl 3.14 inpresflags |= DFL(DC_GETVIEW);
587 gregl 3.7 return;
588 gregl 3.2 case '\n':
589 gregl 3.5 case '\r': /* resume computation */
590 gregl 3.14 inpresflags |= DFL(DC_RESUME);
591 gregl 3.2 return;
592 gregl 3.7 case CTRL('R'): /* redraw screen */
593     if (ncolors > 0)
594     new_ctab(ncolors);
595     qtRedraw(0, 0, odev.hres, odev.vres);
596     return;
597     case CTRL('L'): /* refresh from server */
598 gregl 3.14 if (inpresflags & DFL(DC_REDRAW))
599 gregl 3.8 return;
600 gregl 3.7 XClearWindow(ourdisplay, gwind);
601 gregl 3.9 draw_grids();
602 gregl 3.8 XFlush(ourdisplay);
603 gregl 3.6 qtCompost(100); /* unload the old tree */
604 gregl 3.3 if (ncolors > 0)
605     new_ctab(ncolors);
606 gregl 3.14 inpresflags |= DFL(DC_REDRAW); /* resend values from server */
607 gregl 3.22 rayqleft = 0; /* hold off update */
608 gregl 3.3 return;
609 gregl 3.15 case 'K': /* kill rtrace process(es) */
610     inpresflags |= DFL(DC_KILL);
611     break;
612     case 'R': /* restart rtrace */
613     inpresflags |= DFL(DC_RESTART);
614     break;
615     case 'C': /* clobber holodeck */
616     inpresflags |= DFL(DC_CLOBBER);
617     break;
618 gregl 3.1 case 'q': /* quit the program */
619 gregl 3.14 inpresflags |= DFL(DC_QUIT);
620 gregl 3.1 return;
621     default:
622     XBell(ourdisplay, 0);
623     return;
624     }
625     }
626    
627    
628     static
629     fixwindow(eexp) /* repair damage to window */
630     register XExposeEvent *eexp;
631     {
632     if (odev.hres == 0 || odev.vres == 0) { /* first exposure */
633     odev.hres = eexp->width;
634     odev.vres = eexp->height;
635     }
636     qtRedraw(eexp->x, odev.vres - eexp->y - eexp->height,
637     eexp->x + eexp->width, odev.vres - eexp->y);
638     }
639    
640    
641     static
642     resizewindow(ersz) /* resize window */
643     register XConfigureEvent *ersz;
644     {
645     if (ersz->width == odev.hres && ersz->height == odev.vres)
646     return;
647    
648     odev.hres = ersz->width;
649     odev.vres = ersz->height;
650    
651 gregl 3.12 odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
652     odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
653    
654 gregl 3.14 inpresflags |= DFL(DC_SETVIEW);
655 gregl 3.1 }