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root/radiance/ray/src/hd/rhd_x11.c
Revision: 3.41
Committed: Sun Jul 24 19:53:08 2005 UTC (18 years, 8 months ago) by greg
Content type: text/plain
Branch: MAIN
CVS Tags: rad3R7P2, rad3R7P1
Changes since 3.40: +3 -3 lines
Log Message:
Compile fixes and version update for 3.7 release

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: rhd_x11.c,v 3.40 2005/02/08 01:03:27 greg Exp $";
3 #endif
4 /*
5 * X11 driver for holodeck display.
6 * Based on rview driver.
7 */
8
9 #include <stdlib.h>
10 #include <stdio.h>
11 #include <X11/Xlib.h>
12 #include <X11/cursorfont.h>
13 #include <X11/Xutil.h>
14 #include <time.h>
15
16 #include "platform.h"
17 #include "rtmath.h"
18 #include "rterror.h"
19 #include "plocate.h"
20 #include "rhdisp.h"
21 #include "rhd_qtree.h"
22 #include "x11icon.h"
23
24 #ifndef RAYQLEN
25 #define RAYQLEN 50000 /* max. rays to queue before flush */
26 #endif
27
28 #ifndef FEQ
29 #define FEQ(a,b) ((a)-(b) <= FTINY && (a)-(b) >= -FTINY)
30 #endif
31
32 #define GAMMA 2.2 /* default gamma correction */
33
34 #define FRAMESTATE(s) (((s)&(ShiftMask|ControlMask))==(ShiftMask|ControlMask))
35
36 #define MOVPCT 7 /* percent distance to move /frame */
37 #define MOVDIR(b) ((b)==Button1 ? 1 : (b)==Button2 ? 0 : -1)
38 #define MOVDEG (-5) /* degrees to orbit CW/down /frame */
39 #define MOVORB(s) ((s)&ShiftMask ? 1 : (s)&ControlMask ? -1 : 0)
40
41 #define MINWIDTH 480 /* minimum graphics window width */
42 #define MINHEIGHT 400 /* minimum graphics window height */
43
44 #define VIEWDIST 356 /* assumed viewing distance (mm) */
45
46 #define BORWIDTH 5 /* border width */
47
48 #define ourscreen DefaultScreen(ourdisplay)
49 #define ourroot RootWindow(ourdisplay,ourscreen)
50 #define ourmask (StructureNotifyMask|ExposureMask|KeyPressMask|\
51 ButtonPressMask|ButtonReleaseMask)
52
53 #define levptr(etype) ((etype *)&currentevent)
54
55 struct driver odev; /* global device driver structure */
56
57 TMstruct *tmGlobal; /* global tone-mapping structure */
58
59 char odev_args[64]; /* command arguments */
60
61 static XEvent currentevent; /* current event */
62
63 static int ncolors = 0; /* color table size */
64 static int mapped = 0; /* window is mapped? */
65 static unsigned long *pixval = NULL; /* allocated pixels */
66 static unsigned long ourblack=0, ourwhite=1;
67
68 static Display *ourdisplay = NULL; /* our display */
69 static XVisualInfo ourvinfo; /* our visual information */
70 static Window gwind = 0; /* our graphics window */
71 static GC ourgc = 0; /* our graphics context for drawing */
72 static Colormap ourmap = 0; /* our color map */
73
74 static double pwidth, pheight; /* pixel dimensions (mm) */
75
76 static int inpresflags; /* input result flags */
77
78 static int headlocked = 0; /* lock vertical motion */
79
80
81 static int mytmflags(void);
82 static void xnewcolr(int ndx, int r, int g, int b);
83 static int getpixels(void);
84 static void freepixels(void);
85 static unsigned long true_pixel(register BYTE rgb[3]);
86 static void getevent(void);
87 static int ilclip(int dp[2][2], FVECT wp[2]);
88 static void draw3dline(FVECT wp[2]);
89 static void draw_grids(void);
90 static int moveview(int dx, int dy, int mov, int orb);
91 static void getframe(XButtonPressedEvent *ebut);
92 static void waitabit(void);
93 static void getmove(XButtonPressedEvent *ebut);
94 static void getkey(register XKeyPressedEvent *ekey);
95 static void fixwindow(register XExposeEvent *eexp);
96 static void resizewindow(register XConfigureEvent *ersz);
97
98
99 static int
100 mytmflags(void) /* figure out tone mapping flags */
101 {
102 extern char *progname;
103 register char *cp, *tail;
104 /* find basic name */
105 for (cp = tail = progname; *cp; cp++)
106 if (*cp == '/')
107 tail = cp+1;
108 for (cp = tail; *cp && *cp != '.'; cp++)
109 ;
110 if (cp-tail == 3 && !strncmp(tail, "x11", 3))
111 return(TM_F_CAMERA|TM_F_NOSTDERR);
112 if (cp-tail == 4 && !strncmp(tail, "x11h", 4))
113 return(TM_F_HUMAN|TM_F_NOSTDERR);
114 error(USER, "illegal driver name");
115 return 0; /* pro forma return */
116 }
117
118
119 extern void
120 dev_open( /* initialize X11 driver */
121 char *id
122 )
123 {
124 static RGBPRIMS myprims = STDPRIMS;
125 char *ev;
126 double gamval = GAMMA;
127 RGBPRIMP dpri = stdprims;
128 int nplanes;
129 XSetWindowAttributes ourwinattr;
130 XWMHints ourxwmhints;
131 XSizeHints oursizhints;
132 /* set quadtree globals */
133 qtMinNodesiz = 2;
134 /* open display server */
135 ourdisplay = XOpenDisplay(NULL);
136 if (ourdisplay == NULL)
137 error(USER, "cannot open X-windows; DISPLAY variable set?\n");
138 /* find a usable visual */
139 nplanes = DisplayPlanes(ourdisplay, ourscreen);
140 if (XMatchVisualInfo(ourdisplay,ourscreen,
141 nplanes>12?nplanes:24,TrueColor,&ourvinfo) ||
142 XMatchVisualInfo(ourdisplay,ourscreen,
143 nplanes>12?nplanes:24,DirectColor,&ourvinfo)) {
144 ourblack = 0;
145 ourwhite = ourvinfo.red_mask |
146 ourvinfo.green_mask |
147 ourvinfo.blue_mask ;
148 } else {
149 if (nplanes < 4)
150 error(INTERNAL, "not enough colors\n");
151 if (!XMatchVisualInfo(ourdisplay,ourscreen,
152 nplanes,PseudoColor,&ourvinfo) &&
153 !XMatchVisualInfo(ourdisplay,ourscreen,
154 nplanes,GrayScale,&ourvinfo))
155 error(INTERNAL, "unsupported visual type\n");
156 ourblack = BlackPixel(ourdisplay,ourscreen);
157 ourwhite = WhitePixel(ourdisplay,ourscreen);
158 }
159 /* set gamma and tone mapping */
160 if ((ev = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
161 || (ev = getenv("DISPLAY_GAMMA")) != NULL)
162 gamval = atof(ev);
163 if ((ev = getenv("DISPLAY_PRIMARIES")) != NULL &&
164 sscanf(ev, "%f %f %f %f %f %f %f %f",
165 &myprims[RED][CIEX],&myprims[RED][CIEY],
166 &myprims[GRN][CIEX],&myprims[GRN][CIEY],
167 &myprims[BLU][CIEX],&myprims[BLU][CIEY],
168 &myprims[WHT][CIEX],&myprims[WHT][CIEY]) >= 6)
169 dpri = myprims;
170 tmGlobal = tmInit(mytmflags(), dpri, gamval);
171 if (tmGlobal == NULL)
172 error(SYSTEM, "not enough memory in dev_open");
173 /* open window */
174 ourwinattr.background_pixel = ourblack;
175 ourwinattr.border_pixel = ourblack;
176 ourwinattr.event_mask = ourmask;
177 /* this is stupid */
178 ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
179 ourvinfo.visual, AllocNone);
180 gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
181 DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
182 DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
183 BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
184 CWBackPixel|CWBorderPixel|CWColormap|CWEventMask, &ourwinattr);
185 if (gwind == 0)
186 error(SYSTEM, "cannot create window\n");
187 XStoreName(ourdisplay, gwind, id);
188 /* get graphics context */
189 ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
190 /* set window manager hints */
191 ourxwmhints.flags = InputHint|IconPixmapHint;
192 ourxwmhints.input = True;
193 ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay, gwind,
194 (char *)x11icon_bits, x11icon_width, x11icon_height);
195 XSetWMHints(ourdisplay, gwind, &ourxwmhints);
196 oursizhints.min_width = MINWIDTH;
197 oursizhints.min_height = MINHEIGHT;
198 oursizhints.flags = PMinSize;
199 XSetNormalHints(ourdisplay, gwind, &oursizhints);
200 /* figure out sensible view */
201 pwidth = (double)DisplayWidthMM(ourdisplay, ourscreen) /
202 DisplayWidth(ourdisplay, ourscreen);
203 pheight = (double)DisplayHeightMM(ourdisplay, ourscreen) /
204 DisplayHeight(ourdisplay, ourscreen);
205 odev.v = stdview;
206 odev.v.type = VT_PER;
207 /* map the window and get its size */
208 XMapWindow(ourdisplay, gwind);
209 dev_input(); /* sets size and view angles */
210 /* allocate our leaf pile */
211 if (!qtAllocLeaves(DisplayWidth(ourdisplay,ourscreen) *
212 DisplayHeight(ourdisplay,ourscreen) * 3 /
213 (qtMinNodesiz*qtMinNodesiz*2)))
214 error(SYSTEM, "insufficient memory for leaf storage");
215 odev.name = id;
216 odev.ifd = ConnectionNumber(ourdisplay);
217 }
218
219
220 extern void
221 dev_close(void) /* close our display */
222 {
223 freepixels();
224 XFreeGC(ourdisplay, ourgc);
225 XDestroyWindow(ourdisplay, gwind);
226 gwind = 0;
227 ourgc = 0;
228 XCloseDisplay(ourdisplay);
229 ourdisplay = NULL;
230 qtFreeLeaves();
231 tmDone(tmGlobal);
232 odev.v.type = 0;
233 odev.hres = odev.vres = 0;
234 odev.ifd = -1;
235 }
236
237
238 extern void
239 dev_clear(void) /* clear our quadtree */
240 {
241 qtCompost(100);
242 if (ncolors > 0)
243 new_ctab(ncolors);
244 rayqleft = 0; /* hold off update */
245 }
246
247
248 extern int
249 dev_view( /* assign new driver view */
250 VIEW *nv
251 )
252 {
253 if (nv->type == VT_PAR || /* check view legality */
254 nv->horiz > 160. || nv->vert > 160.) {
255 error(COMMAND, "illegal view type/angle");
256 nv->type = VT_PER;
257 nv->horiz = odev.v.horiz;
258 nv->vert = odev.v.vert;
259 return(0);
260 }
261 if (nv->vfore > FTINY) {
262 error(COMMAND, "cannot handle fore clipping");
263 nv->vfore = 0.;
264 return(0);
265 }
266 if (nv != &odev.v) {
267 if (!FEQ(nv->horiz,odev.v.horiz) || /* resize window? */
268 !FEQ(nv->vert,odev.v.vert)) {
269 int dw = DisplayWidth(ourdisplay,ourscreen);
270 int dh = DisplayHeight(ourdisplay,ourscreen);
271
272 dw -= 25; /* for window frame */
273 dh -= 50;
274 odev.hres = 2.*VIEWDIST/pwidth *
275 tan(PI/180./2.*nv->horiz);
276 odev.vres = 2.*VIEWDIST/pheight *
277 tan(PI/180./2.*nv->vert);
278 if (odev.hres > dw) {
279 odev.vres = dw * odev.vres / odev.hres;
280 odev.hres = dw;
281 }
282 if (odev.vres > dh) {
283 odev.hres = dh * odev.hres / odev.vres;
284 odev.vres = dh;
285 }
286 XResizeWindow(ourdisplay, gwind, odev.hres, odev.vres);
287 dev_input(); /* wait for resize event */
288 }
289 odev.v = *nv;
290 }
291 qtReplant();
292 return(1);
293 }
294
295
296 extern void
297 dev_section( /* add octree for geometry rendering */
298 char *ofn
299 )
300 {
301 /* unimplemented */
302 }
303
304
305 extern void
306 dev_auxcom( /* process an auxiliary command */
307 char *cmd,
308 char *args
309 )
310 {
311 sprintf(errmsg, "%s: unknown command", cmd);
312 error(COMMAND, errmsg);
313 }
314
315
316 extern VIEW *
317 dev_auxview( /* return nth auxiliary view */
318 int n,
319 int hvres[2]
320 )
321 {
322 if (n)
323 return(NULL);
324 hvres[0] = odev.hres; hvres[1] = odev.vres;
325 return(&odev.v);
326 }
327
328
329 extern int
330 dev_input(void) /* get X11 input */
331 {
332 inpresflags = 0;
333
334 do
335 getevent();
336
337 while (XPending(ourdisplay) > 0);
338
339 odev.inpready = 0;
340
341 return(inpresflags);
342 }
343
344
345 extern void
346 dev_paintr( /* fill a rectangle */
347 BYTE rgb[3],
348 int xmin,
349 int ymin,
350 int xmax,
351 int ymax
352 )
353 {
354 unsigned long pixel;
355
356 if (!mapped)
357 return;
358 if (ncolors > 0)
359 pixel = pixval[get_pixel(rgb, xnewcolr)];
360 else
361 pixel = true_pixel(rgb);
362 XSetForeground(ourdisplay, ourgc, pixel);
363 XFillRectangle(ourdisplay, gwind,
364 ourgc, xmin, odev.vres-ymax, xmax-xmin, ymax-ymin);
365 }
366
367
368 extern int
369 dev_flush(void) /* flush output */
370 {
371 qtUpdate();
372 rayqleft = RAYQLEN;
373 return(odev.inpready = XPending(ourdisplay));
374 }
375
376
377 static void
378 xnewcolr( /* enter a color into hardware table */
379 int ndx,
380 int r,
381 int g,
382 int b
383 )
384 {
385 XColor xcolor;
386
387 xcolor.pixel = pixval[ndx];
388 xcolor.red = r << 8;
389 xcolor.green = g << 8;
390 xcolor.blue = b << 8;
391 xcolor.flags = DoRed|DoGreen|DoBlue;
392
393 XStoreColor(ourdisplay, ourmap, &xcolor);
394 }
395
396
397 static int
398 getpixels(void) /* get the color map */
399 {
400 XColor thiscolor;
401 register int i, j;
402
403 if (ncolors > 0)
404 return(ncolors);
405 if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
406 ourmap = DefaultColormap(ourdisplay,ourscreen);
407 goto loop;
408 }
409 newmap:
410 ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
411 loop:
412 for (ncolors = ourvinfo.colormap_size;
413 ncolors > ourvinfo.colormap_size/3;
414 ncolors = ncolors*.937) {
415 pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
416 if (pixval == NULL)
417 return(ncolors = 0);
418 if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
419 break;
420 free((void *)pixval);
421 pixval = NULL;
422 }
423 if (pixval == NULL) {
424 if (ourmap == DefaultColormap(ourdisplay,ourscreen))
425 goto newmap; /* try it with our map */
426 else
427 return(ncolors = 0); /* failed */
428 }
429 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
430 for (i = 0; i < ncolors; i++) { /* reset black and white */
431 if (pixval[i] != ourblack && pixval[i] != ourwhite)
432 continue;
433 thiscolor.pixel = pixval[i];
434 thiscolor.flags = DoRed|DoGreen|DoBlue;
435 XQueryColor(ourdisplay,
436 DefaultColormap(ourdisplay,ourscreen),
437 &thiscolor);
438 XStoreColor(ourdisplay, ourmap, &thiscolor);
439 for (j = i; j+1 < ncolors; j++)
440 pixval[j] = pixval[j+1];
441 ncolors--;
442 i--;
443 }
444 XSetWindowColormap(ourdisplay, gwind, ourmap);
445 return(ncolors);
446 }
447
448
449 static void
450 freepixels(void) /* free our pixels */
451 {
452 if (ncolors == 0)
453 return;
454 XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
455 free((void *)pixval);
456 pixval = NULL;
457 ncolors = 0;
458 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
459 XFreeColormap(ourdisplay, ourmap);
460 ourmap = 0;
461 }
462
463
464 static unsigned long
465 true_pixel( /* return true pixel value for color */
466 register BYTE rgb[3]
467 )
468 {
469 register unsigned long rval;
470
471 rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
472 rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
473 rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
474 return(rval);
475 }
476
477
478 static void
479 getevent(void) /* get next event */
480 {
481 XNextEvent(ourdisplay, levptr(XEvent));
482 switch (levptr(XEvent)->type) {
483 case ConfigureNotify:
484 resizewindow(levptr(XConfigureEvent));
485 break;
486 case UnmapNotify:
487 mapped = 0;
488 freepixels();
489 break;
490 case MapNotify:
491 if (ourvinfo.class == PseudoColor ||
492 ourvinfo.class == GrayScale) {
493 if (getpixels() == 0)
494 error(SYSTEM, "cannot allocate colors\n");
495 new_ctab(ncolors);
496 }
497 mapped = 1;
498 break;
499 case Expose:
500 fixwindow(levptr(XExposeEvent));
501 break;
502 case KeyPress:
503 getkey(levptr(XKeyPressedEvent));
504 break;
505 case ButtonPress:
506 if (FRAMESTATE(levptr(XButtonPressedEvent)->state))
507 getframe(levptr(XButtonPressedEvent));
508 else
509 getmove(levptr(XButtonPressedEvent));
510 break;
511 }
512 }
513
514
515 static int
516 ilclip( /* clip world coordinates to device */
517 int dp[2][2],
518 FVECT wp[2]
519 )
520 {
521 static FVECT vmin = {0.,0.,0.}, vmax = {1.-FTINY,1.-FTINY,FHUGE};
522 FVECT wpc[2], ip[2];
523 double d, d0, d1;
524 /* check for points behind view */
525 d = DOT(odev.v.vp, odev.v.vdir);
526 d0 = DOT(wp[0], odev.v.vdir) - d;
527 d1 = DOT(wp[1], odev.v.vdir) - d;
528 /* work on copy of world points */
529 if (d0 <= d1) {
530 VCOPY(wpc[0], wp[0]); VCOPY(wpc[1], wp[1]);
531 } else {
532 d = d0; d0 = d1; d1 = d;
533 VCOPY(wpc[1], wp[0]); VCOPY(wpc[0], wp[1]);
534 }
535 if (d0 <= FTINY) {
536 if (d1 <= FTINY) return(0);
537 VSUB(wpc[0], wpc[0], wpc[1]);
538 d = .99*d1/(d1-d0);
539 VSUM(wpc[0], wpc[1], wpc[0], d);
540 }
541 /* get view coordinates and clip to window */
542 viewloc(ip[0], &odev.v, wpc[0]);
543 viewloc(ip[1], &odev.v, wpc[1]);
544 if (!clip(ip[0], ip[1], vmin, vmax))
545 return(0);
546 dp[0][0] = ip[0][0]*odev.hres;
547 dp[0][1] = ip[0][1]*odev.vres;
548 dp[1][0] = ip[1][0]*odev.hres;
549 dp[1][1] = ip[1][1]*odev.vres;
550 return(1);
551 }
552
553
554 static void
555 draw3dline( /* draw 3d line in world coordinates */
556 FVECT wp[2]
557 )
558 {
559 int dp[2][2];
560
561 if (!ilclip(dp, wp))
562 return;
563 XDrawLine(ourdisplay, gwind, ourgc,
564 dp[0][0], odev.vres-1 - dp[0][1],
565 dp[1][0], odev.vres-1 - dp[1][1]);
566 }
567
568
569 static void
570 draw_grids(void) /* draw holodeck section grids */
571 {
572 static BYTE gridrgb[3] = {0x0, 0xff, 0xff};
573 unsigned long pixel;
574
575 if (ncolors > 0)
576 pixel = pixval[get_pixel(gridrgb, xnewcolr)];
577 else
578 pixel = true_pixel(gridrgb);
579 XSetForeground(ourdisplay, ourgc, pixel);
580 /* draw each grid line */
581 gridlines(draw3dline);
582 }
583
584
585 static int
586 moveview( /* move our view */
587 int dx,
588 int dy,
589 int mov,
590 int orb
591 )
592 {
593 VIEW nv;
594 FVECT odir, v1;
595 double d;
596 register int li;
597 /* start with old view */
598 nv = odev.v;
599 /* change view direction */
600 if (mov | orb) {
601 if ((li = qtFindLeaf(dx, dy)) < 0)
602 return(0); /* not on window */
603 VSUM(odir, qtL.wp[li], nv.vp, -1.);
604 } else {
605 if (viewray(nv.vp, nv.vdir, &odev.v,
606 (dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
607 return(0); /* outside view */
608 }
609 if (orb && mov) { /* orbit left/right */
610 spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
611 VSUM(nv.vp, qtL.wp[li], odir, -1.);
612 spinvector(nv.vdir, nv.vdir, nv.vup, d);
613 } else if (orb) { /* orbit up/down */
614 fcross(v1, odir, nv.vup);
615 if (normalize(v1) == 0.)
616 return(0);
617 spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
618 VSUM(nv.vp, qtL.wp[li], odir, -1.);
619 spinvector(nv.vdir, nv.vdir, v1, d);
620 } else if (mov) { /* move forward/backward */
621 d = MOVPCT/100. * mov;
622 VSUM(nv.vp, nv.vp, odir, d);
623 }
624 if (!mov ^ !orb && headlocked) { /* restore head height */
625 VSUM(v1, odev.v.vp, nv.vp, -1.);
626 d = DOT(v1, odev.v.vup);
627 VSUM(nv.vp, nv.vp, odev.v.vup, d);
628 }
629 if (setview(&nv) != NULL)
630 return(0); /* illegal view */
631 dev_view(&nv);
632 inpresflags |= DFL(DC_SETVIEW);
633 return(1);
634 }
635
636
637 static void
638 getframe( /* get focus frame */
639 XButtonPressedEvent *ebut
640 )
641 {
642 int startx = ebut->x, starty = ebut->y;
643 int endx, endy, midx, midy;
644 FVECT v1;
645 int li;
646 /* get mouse drag */
647 XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent));
648 endx = levptr(XButtonReleasedEvent)->x;
649 endy = levptr(XButtonReleasedEvent)->y;
650 midx = (startx + endx) >> 1;
651 midy = (starty + endy) >> 1;
652 /* set focus distance */
653 if ((li = qtFindLeaf(midx, midy)) < 0)
654 return; /* not on window */
655 VCOPY(v1, qtL.wp[li]);
656 odev.v.vdist = sqrt(dist2(odev.v.vp, v1));
657 /* set frame for rendering */
658 if ((endx == startx) | (endy == starty))
659 return;
660 if (endx < startx) {register int c = endx; endx = startx; startx = c;}
661 if (endy < starty) {register int c = endy; endy = starty; starty = c;}
662 sprintf(odev_args, "%.3f %.3f %.3f %.3f",
663 (startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres,
664 (endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres);
665 inpresflags |= DFL(DC_FOCUS);
666 }
667
668
669 static void
670 waitabit(void) /* pause a moment */
671 {
672 struct timespec ts;
673 ts.tv_sec = 0;
674 ts.tv_nsec = 100000000;
675 nanosleep(&ts, NULL);
676 }
677
678
679 static void
680 getmove( /* get view change */
681 XButtonPressedEvent *ebut
682 )
683 {
684 int movdir = MOVDIR(ebut->button);
685 int movorb = MOVORB(ebut->state);
686 int oldnodesiz = qtMinNodesiz;
687 Window rootw, childw;
688 int rootx, rooty, wx, wy;
689 unsigned int statemask;
690
691 qtMinNodesiz = 16; /* for quicker update */
692 XNoOp(ourdisplay);
693
694 while (!XCheckMaskEvent(ourdisplay,
695 ButtonReleaseMask, levptr(XEvent))) {
696 waitabit();
697 if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
698 &rootx, &rooty, &wx, &wy, &statemask))
699 break; /* on another screen */
700
701 if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
702 sleep(1);
703 continue;
704 }
705 XClearWindow(ourdisplay, gwind);
706 qtUpdate();
707 draw_grids();
708 }
709 if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
710 movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
711 wx = levptr(XButtonReleasedEvent)->x;
712 wy = levptr(XButtonReleasedEvent)->y;
713 moveview(wx, odev.vres-1-wy, movdir, movorb);
714 }
715 dev_flush();
716
717 qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */
718 }
719
720
721 static void
722 getkey( /* get input key */
723 register XKeyPressedEvent *ekey
724 )
725 {
726 Window rootw, childw;
727 int rootx, rooty, wx, wy;
728 unsigned int statemask;
729 int n;
730 char buf[8];
731
732 n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
733 if (n != 1)
734 return;
735 switch (buf[0]) {
736 case 'h': /* turn on height motion lock */
737 headlocked = 1;
738 return;
739 case 'H': /* turn off height motion lock */
740 headlocked = 0;
741 return;
742 case 'l': /* retrieve last view */
743 inpresflags |= DFL(DC_LASTVIEW);
744 return;
745 case 'f': /* frame view position */
746 if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
747 &rootx, &rooty, &wx, &wy, &statemask))
748 return; /* on another screen */
749 sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres,
750 1.-(wy+.5)/odev.vres);
751 inpresflags |= DFL(DC_FOCUS);
752 return;
753 case 'F': /* unfocus */
754 odev_args[0] = '\0';
755 inpresflags |= DFL(DC_FOCUS);
756 return;
757 case 'p': /* pause computation */
758 inpresflags |= DFL(DC_PAUSE);
759 return;
760 case 'v': /* spit out view */
761 inpresflags |= DFL(DC_GETVIEW);
762 return;
763 case '\n':
764 case '\r': /* resume computation */
765 inpresflags |= DFL(DC_RESUME);
766 return;
767 case CTRL('R'): /* redraw screen */
768 if (ncolors > 0)
769 new_ctab(ncolors);
770 qtRedraw(0, 0, odev.hres, odev.vres);
771 return;
772 case CTRL('L'): /* refresh from server */
773 if (inpresflags & DFL(DC_REDRAW))
774 return;
775 XClearWindow(ourdisplay, gwind);
776 draw_grids();
777 XFlush(ourdisplay);
778 qtCompost(100); /* unload the old tree */
779 if (ncolors > 0)
780 new_ctab(ncolors);
781 inpresflags |= DFL(DC_REDRAW); /* resend values from server */
782 rayqleft = 0; /* hold off update */
783 return;
784 case 'K': /* kill rtrace process(es) */
785 inpresflags |= DFL(DC_KILL);
786 break;
787 case 'R': /* restart rtrace */
788 inpresflags |= DFL(DC_RESTART);
789 break;
790 case 'C': /* clobber holodeck */
791 inpresflags |= DFL(DC_CLOBBER);
792 break;
793 case 'q': /* quit the program */
794 inpresflags |= DFL(DC_QUIT);
795 return;
796 default:
797 XBell(ourdisplay, 0);
798 return;
799 }
800 }
801
802
803 static void
804 fixwindow( /* repair damage to window */
805 register XExposeEvent *eexp
806 )
807 {
808 if (odev.hres == 0 || odev.vres == 0) { /* first exposure */
809 odev.hres = eexp->width;
810 odev.vres = eexp->height;
811 }
812 qtRedraw(eexp->x, odev.vres - eexp->y - eexp->height,
813 eexp->x + eexp->width, odev.vres - eexp->y);
814 }
815
816
817 static void
818 resizewindow( /* resize window */
819 register XConfigureEvent *ersz
820 )
821 {
822 if (ersz->width == odev.hres && ersz->height == odev.vres)
823 return;
824
825 odev.hres = ersz->width;
826 odev.vres = ersz->height;
827
828 odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
829 odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
830
831 inpresflags |= DFL(DC_SETVIEW);
832 }