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root/radiance/ray/src/hd/rhd_x11.c
Revision: 3.42
Committed: Wed Jun 7 17:52:04 2006 UTC (17 years, 9 months ago) by schorsch
Content type: text/plain
Branch: MAIN
CVS Tags: rad4R0, rad3R8, rad3R9
Changes since 3.41: +3 -2 lines
Log Message:
Eliminated some compiler warnings.

File Contents

# Content
1 #ifndef lint
2 static const char RCSid[] = "$Id: rhd_x11.c,v 3.41 2005/07/24 19:53:08 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 *gfn,
299 char *pfn
300 )
301 {
302 /* unimplemented */
303 }
304
305
306 extern void
307 dev_auxcom( /* process an auxiliary command */
308 char *cmd,
309 char *args
310 )
311 {
312 sprintf(errmsg, "%s: unknown command", cmd);
313 error(COMMAND, errmsg);
314 }
315
316
317 extern VIEW *
318 dev_auxview( /* return nth auxiliary view */
319 int n,
320 int hvres[2]
321 )
322 {
323 if (n)
324 return(NULL);
325 hvres[0] = odev.hres; hvres[1] = odev.vres;
326 return(&odev.v);
327 }
328
329
330 extern int
331 dev_input(void) /* get X11 input */
332 {
333 inpresflags = 0;
334
335 do
336 getevent();
337
338 while (XPending(ourdisplay) > 0);
339
340 odev.inpready = 0;
341
342 return(inpresflags);
343 }
344
345
346 extern void
347 dev_paintr( /* fill a rectangle */
348 BYTE rgb[3],
349 int xmin,
350 int ymin,
351 int xmax,
352 int ymax
353 )
354 {
355 unsigned long pixel;
356
357 if (!mapped)
358 return;
359 if (ncolors > 0)
360 pixel = pixval[get_pixel(rgb, xnewcolr)];
361 else
362 pixel = true_pixel(rgb);
363 XSetForeground(ourdisplay, ourgc, pixel);
364 XFillRectangle(ourdisplay, gwind,
365 ourgc, xmin, odev.vres-ymax, xmax-xmin, ymax-ymin);
366 }
367
368
369 extern int
370 dev_flush(void) /* flush output */
371 {
372 qtUpdate();
373 rayqleft = RAYQLEN;
374 return(odev.inpready = XPending(ourdisplay));
375 }
376
377
378 static void
379 xnewcolr( /* enter a color into hardware table */
380 int ndx,
381 int r,
382 int g,
383 int b
384 )
385 {
386 XColor xcolor;
387
388 xcolor.pixel = pixval[ndx];
389 xcolor.red = r << 8;
390 xcolor.green = g << 8;
391 xcolor.blue = b << 8;
392 xcolor.flags = DoRed|DoGreen|DoBlue;
393
394 XStoreColor(ourdisplay, ourmap, &xcolor);
395 }
396
397
398 static int
399 getpixels(void) /* get the color map */
400 {
401 XColor thiscolor;
402 register int i, j;
403
404 if (ncolors > 0)
405 return(ncolors);
406 if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
407 ourmap = DefaultColormap(ourdisplay,ourscreen);
408 goto loop;
409 }
410 newmap:
411 ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
412 loop:
413 for (ncolors = ourvinfo.colormap_size;
414 ncolors > ourvinfo.colormap_size/3;
415 ncolors = ncolors*.937) {
416 pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
417 if (pixval == NULL)
418 return(ncolors = 0);
419 if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
420 break;
421 free((void *)pixval);
422 pixval = NULL;
423 }
424 if (pixval == NULL) {
425 if (ourmap == DefaultColormap(ourdisplay,ourscreen))
426 goto newmap; /* try it with our map */
427 else
428 return(ncolors = 0); /* failed */
429 }
430 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
431 for (i = 0; i < ncolors; i++) { /* reset black and white */
432 if (pixval[i] != ourblack && pixval[i] != ourwhite)
433 continue;
434 thiscolor.pixel = pixval[i];
435 thiscolor.flags = DoRed|DoGreen|DoBlue;
436 XQueryColor(ourdisplay,
437 DefaultColormap(ourdisplay,ourscreen),
438 &thiscolor);
439 XStoreColor(ourdisplay, ourmap, &thiscolor);
440 for (j = i; j+1 < ncolors; j++)
441 pixval[j] = pixval[j+1];
442 ncolors--;
443 i--;
444 }
445 XSetWindowColormap(ourdisplay, gwind, ourmap);
446 return(ncolors);
447 }
448
449
450 static void
451 freepixels(void) /* free our pixels */
452 {
453 if (ncolors == 0)
454 return;
455 XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
456 free((void *)pixval);
457 pixval = NULL;
458 ncolors = 0;
459 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
460 XFreeColormap(ourdisplay, ourmap);
461 ourmap = 0;
462 }
463
464
465 static unsigned long
466 true_pixel( /* return true pixel value for color */
467 register BYTE rgb[3]
468 )
469 {
470 register unsigned long rval;
471
472 rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
473 rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
474 rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
475 return(rval);
476 }
477
478
479 static void
480 getevent(void) /* get next event */
481 {
482 XNextEvent(ourdisplay, levptr(XEvent));
483 switch (levptr(XEvent)->type) {
484 case ConfigureNotify:
485 resizewindow(levptr(XConfigureEvent));
486 break;
487 case UnmapNotify:
488 mapped = 0;
489 freepixels();
490 break;
491 case MapNotify:
492 if (ourvinfo.class == PseudoColor ||
493 ourvinfo.class == GrayScale) {
494 if (getpixels() == 0)
495 error(SYSTEM, "cannot allocate colors\n");
496 new_ctab(ncolors);
497 }
498 mapped = 1;
499 break;
500 case Expose:
501 fixwindow(levptr(XExposeEvent));
502 break;
503 case KeyPress:
504 getkey(levptr(XKeyPressedEvent));
505 break;
506 case ButtonPress:
507 if (FRAMESTATE(levptr(XButtonPressedEvent)->state))
508 getframe(levptr(XButtonPressedEvent));
509 else
510 getmove(levptr(XButtonPressedEvent));
511 break;
512 }
513 }
514
515
516 static int
517 ilclip( /* clip world coordinates to device */
518 int dp[2][2],
519 FVECT wp[2]
520 )
521 {
522 static FVECT vmin = {0.,0.,0.}, vmax = {1.-FTINY,1.-FTINY,FHUGE};
523 FVECT wpc[2], ip[2];
524 double d, d0, d1;
525 /* check for points behind view */
526 d = DOT(odev.v.vp, odev.v.vdir);
527 d0 = DOT(wp[0], odev.v.vdir) - d;
528 d1 = DOT(wp[1], odev.v.vdir) - d;
529 /* work on copy of world points */
530 if (d0 <= d1) {
531 VCOPY(wpc[0], wp[0]); VCOPY(wpc[1], wp[1]);
532 } else {
533 d = d0; d0 = d1; d1 = d;
534 VCOPY(wpc[1], wp[0]); VCOPY(wpc[0], wp[1]);
535 }
536 if (d0 <= FTINY) {
537 if (d1 <= FTINY) return(0);
538 VSUB(wpc[0], wpc[0], wpc[1]);
539 d = .99*d1/(d1-d0);
540 VSUM(wpc[0], wpc[1], wpc[0], d);
541 }
542 /* get view coordinates and clip to window */
543 viewloc(ip[0], &odev.v, wpc[0]);
544 viewloc(ip[1], &odev.v, wpc[1]);
545 if (!clip(ip[0], ip[1], vmin, vmax))
546 return(0);
547 dp[0][0] = ip[0][0]*odev.hres;
548 dp[0][1] = ip[0][1]*odev.vres;
549 dp[1][0] = ip[1][0]*odev.hres;
550 dp[1][1] = ip[1][1]*odev.vres;
551 return(1);
552 }
553
554
555 static void
556 draw3dline( /* draw 3d line in world coordinates */
557 FVECT wp[2]
558 )
559 {
560 int dp[2][2];
561
562 if (!ilclip(dp, wp))
563 return;
564 XDrawLine(ourdisplay, gwind, ourgc,
565 dp[0][0], odev.vres-1 - dp[0][1],
566 dp[1][0], odev.vres-1 - dp[1][1]);
567 }
568
569
570 static void
571 draw_grids(void) /* draw holodeck section grids */
572 {
573 static BYTE gridrgb[3] = {0x0, 0xff, 0xff};
574 unsigned long pixel;
575
576 if (ncolors > 0)
577 pixel = pixval[get_pixel(gridrgb, xnewcolr)];
578 else
579 pixel = true_pixel(gridrgb);
580 XSetForeground(ourdisplay, ourgc, pixel);
581 /* draw each grid line */
582 gridlines(draw3dline);
583 }
584
585
586 static int
587 moveview( /* move our view */
588 int dx,
589 int dy,
590 int mov,
591 int orb
592 )
593 {
594 VIEW nv;
595 FVECT odir, v1;
596 double d;
597 register int li;
598 /* start with old view */
599 nv = odev.v;
600 /* change view direction */
601 if (mov | orb) {
602 if ((li = qtFindLeaf(dx, dy)) < 0)
603 return(0); /* not on window */
604 VSUM(odir, qtL.wp[li], nv.vp, -1.);
605 } else {
606 if (viewray(nv.vp, nv.vdir, &odev.v,
607 (dx+.5)/odev.hres, (dy+.5)/odev.vres) < -FTINY)
608 return(0); /* outside view */
609 }
610 if (orb && mov) { /* orbit left/right */
611 spinvector(odir, odir, nv.vup, d=MOVDEG*PI/180.*mov);
612 VSUM(nv.vp, qtL.wp[li], odir, -1.);
613 spinvector(nv.vdir, nv.vdir, nv.vup, d);
614 } else if (orb) { /* orbit up/down */
615 fcross(v1, odir, nv.vup);
616 if (normalize(v1) == 0.)
617 return(0);
618 spinvector(odir, odir, v1, d=MOVDEG*PI/180.*orb);
619 VSUM(nv.vp, qtL.wp[li], odir, -1.);
620 spinvector(nv.vdir, nv.vdir, v1, d);
621 } else if (mov) { /* move forward/backward */
622 d = MOVPCT/100. * mov;
623 VSUM(nv.vp, nv.vp, odir, d);
624 }
625 if (!mov ^ !orb && headlocked) { /* restore head height */
626 VSUM(v1, odev.v.vp, nv.vp, -1.);
627 d = DOT(v1, odev.v.vup);
628 VSUM(nv.vp, nv.vp, odev.v.vup, d);
629 }
630 if (setview(&nv) != NULL)
631 return(0); /* illegal view */
632 dev_view(&nv);
633 inpresflags |= DFL(DC_SETVIEW);
634 return(1);
635 }
636
637
638 static void
639 getframe( /* get focus frame */
640 XButtonPressedEvent *ebut
641 )
642 {
643 int startx = ebut->x, starty = ebut->y;
644 int endx, endy, midx, midy;
645 FVECT v1;
646 int li;
647 /* get mouse drag */
648 XMaskEvent(ourdisplay, ButtonReleaseMask, levptr(XEvent));
649 endx = levptr(XButtonReleasedEvent)->x;
650 endy = levptr(XButtonReleasedEvent)->y;
651 midx = (startx + endx) >> 1;
652 midy = (starty + endy) >> 1;
653 /* set focus distance */
654 if ((li = qtFindLeaf(midx, midy)) < 0)
655 return; /* not on window */
656 VCOPY(v1, qtL.wp[li]);
657 odev.v.vdist = sqrt(dist2(odev.v.vp, v1));
658 /* set frame for rendering */
659 if ((endx == startx) | (endy == starty))
660 return;
661 if (endx < startx) {register int c = endx; endx = startx; startx = c;}
662 if (endy < starty) {register int c = endy; endy = starty; starty = c;}
663 sprintf(odev_args, "%.3f %.3f %.3f %.3f",
664 (startx+.5)/odev.hres, 1.-(endy+.5)/odev.vres,
665 (endx+.5)/odev.hres, 1.-(starty+.5)/odev.vres);
666 inpresflags |= DFL(DC_FOCUS);
667 }
668
669
670 static void
671 waitabit(void) /* pause a moment */
672 {
673 struct timespec ts;
674 ts.tv_sec = 0;
675 ts.tv_nsec = 100000000;
676 nanosleep(&ts, NULL);
677 }
678
679
680 static void
681 getmove( /* get view change */
682 XButtonPressedEvent *ebut
683 )
684 {
685 int movdir = MOVDIR(ebut->button);
686 int movorb = MOVORB(ebut->state);
687 int oldnodesiz = qtMinNodesiz;
688 Window rootw, childw;
689 int rootx, rooty, wx, wy;
690 unsigned int statemask;
691
692 qtMinNodesiz = 16; /* for quicker update */
693 XNoOp(ourdisplay);
694
695 while (!XCheckMaskEvent(ourdisplay,
696 ButtonReleaseMask, levptr(XEvent))) {
697 waitabit();
698 if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
699 &rootx, &rooty, &wx, &wy, &statemask))
700 break; /* on another screen */
701
702 if (!moveview(wx, odev.vres-1-wy, movdir, movorb)) {
703 sleep(1);
704 continue;
705 }
706 XClearWindow(ourdisplay, gwind);
707 qtUpdate();
708 draw_grids();
709 }
710 if (!(inpresflags & DFL(DC_SETVIEW))) { /* do final motion */
711 movdir = MOVDIR(levptr(XButtonReleasedEvent)->button);
712 wx = levptr(XButtonReleasedEvent)->x;
713 wy = levptr(XButtonReleasedEvent)->y;
714 moveview(wx, odev.vres-1-wy, movdir, movorb);
715 }
716 dev_flush();
717
718 qtMinNodesiz = oldnodesiz; /* restore quadtree resolution */
719 }
720
721
722 static void
723 getkey( /* get input key */
724 register XKeyPressedEvent *ekey
725 )
726 {
727 Window rootw, childw;
728 int rootx, rooty, wx, wy;
729 unsigned int statemask;
730 int n;
731 char buf[8];
732
733 n = XLookupString(ekey, buf, sizeof(buf), NULL, NULL);
734 if (n != 1)
735 return;
736 switch (buf[0]) {
737 case 'h': /* turn on height motion lock */
738 headlocked = 1;
739 return;
740 case 'H': /* turn off height motion lock */
741 headlocked = 0;
742 return;
743 case 'l': /* retrieve last view */
744 inpresflags |= DFL(DC_LASTVIEW);
745 return;
746 case 'f': /* frame view position */
747 if (!XQueryPointer(ourdisplay, gwind, &rootw, &childw,
748 &rootx, &rooty, &wx, &wy, &statemask))
749 return; /* on another screen */
750 sprintf(odev_args, "%.4f %.4f", (wx+.5)/odev.hres,
751 1.-(wy+.5)/odev.vres);
752 inpresflags |= DFL(DC_FOCUS);
753 return;
754 case 'F': /* unfocus */
755 odev_args[0] = '\0';
756 inpresflags |= DFL(DC_FOCUS);
757 return;
758 case 'p': /* pause computation */
759 inpresflags |= DFL(DC_PAUSE);
760 return;
761 case 'v': /* spit out view */
762 inpresflags |= DFL(DC_GETVIEW);
763 return;
764 case '\n':
765 case '\r': /* resume computation */
766 inpresflags |= DFL(DC_RESUME);
767 return;
768 case CTRL('R'): /* redraw screen */
769 if (ncolors > 0)
770 new_ctab(ncolors);
771 qtRedraw(0, 0, odev.hres, odev.vres);
772 return;
773 case CTRL('L'): /* refresh from server */
774 if (inpresflags & DFL(DC_REDRAW))
775 return;
776 XClearWindow(ourdisplay, gwind);
777 draw_grids();
778 XFlush(ourdisplay);
779 qtCompost(100); /* unload the old tree */
780 if (ncolors > 0)
781 new_ctab(ncolors);
782 inpresflags |= DFL(DC_REDRAW); /* resend values from server */
783 rayqleft = 0; /* hold off update */
784 return;
785 case 'K': /* kill rtrace process(es) */
786 inpresflags |= DFL(DC_KILL);
787 break;
788 case 'R': /* restart rtrace */
789 inpresflags |= DFL(DC_RESTART);
790 break;
791 case 'C': /* clobber holodeck */
792 inpresflags |= DFL(DC_CLOBBER);
793 break;
794 case 'q': /* quit the program */
795 inpresflags |= DFL(DC_QUIT);
796 return;
797 default:
798 XBell(ourdisplay, 0);
799 return;
800 }
801 }
802
803
804 static void
805 fixwindow( /* repair damage to window */
806 register XExposeEvent *eexp
807 )
808 {
809 if (odev.hres == 0 || odev.vres == 0) { /* first exposure */
810 odev.hres = eexp->width;
811 odev.vres = eexp->height;
812 }
813 qtRedraw(eexp->x, odev.vres - eexp->y - eexp->height,
814 eexp->x + eexp->width, odev.vres - eexp->y);
815 }
816
817
818 static void
819 resizewindow( /* resize window */
820 register XConfigureEvent *ersz
821 )
822 {
823 if (ersz->width == odev.hres && ersz->height == odev.vres)
824 return;
825
826 odev.hres = ersz->width;
827 odev.vres = ersz->height;
828
829 odev.v.horiz = 2.*180./PI * atan(0.5/VIEWDIST*pwidth*odev.hres);
830 odev.v.vert = 2.*180./PI * atan(0.5/VIEWDIST*pheight*odev.vres);
831
832 inpresflags |= DFL(DC_SETVIEW);
833 }