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root/radiance/ray/src/rt/x11.c
Revision: 2.22
Committed: Mon Dec 12 11:22:20 1994 UTC (29 years, 4 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.21: +6 -0 lines
Log Message:
removed some code for Solaris (idiot OS)

File Contents

# Content
1 /* Copyright (c) 1992 Regents of the University of California */
2
3 #ifndef lint
4 static char SCCSid[] = "$SunId$ LBL";
5 #endif
6
7 /*
8 * x11.c - driver for X-windows version 11
9 *
10 * Jan 1990
11 */
12
13 #include <stdio.h>
14 #include <math.h>
15 #include <sys/ioctl.h>
16 #include <fcntl.h>
17
18 #include <X11/Xlib.h>
19 #include <X11/cursorfont.h>
20 #include <X11/Xutil.h>
21
22 #include "color.h"
23 #include "driver.h"
24 #include "x11twind.h"
25 #include "x11icon.h"
26
27 #define GAMMA 2.2 /* default exponent correction */
28
29 #define MINWIDTH (32*COMCW) /* minimum graphics window width */
30 #define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
31
32 #define BORWIDTH 5 /* border width */
33 #define COMHEIGHT (COMLH*COMCH) /* command line height (pixels) */
34
35 #define COMFN "8x13" /* command line font name */
36 #define COMLH 3 /* number of command lines */
37 #define COMCW 8 /* approx. character width (pixels) */
38 #define COMCH 14 /* approx. character height (pixels) */
39
40 #define ourscreen DefaultScreen(ourdisplay)
41 #define ourroot RootWindow(ourdisplay,ourscreen)
42
43 #define levptr(etype) ((etype *)&currentevent)
44
45 static XEvent currentevent; /* current event */
46
47 static int ncolors = 0; /* color table size */
48 static int mapped = 0; /* window is mapped? */
49 static unsigned long *pixval = NULL; /* allocated pixels */
50 static unsigned long ourblack=0, ourwhite=1;
51
52 static Display *ourdisplay = NULL; /* our display */
53
54 static XVisualInfo ourvinfo; /* our visual information */
55
56 static Window gwind = 0; /* our graphics window */
57
58 static Cursor pickcursor = 0; /* cursor used for picking */
59
60 static int gwidth, gheight; /* graphics window size */
61
62 static int comheight; /* desired comline height */
63 static TEXTWIND *comline = NULL; /* our command line */
64
65 static char c_queue[64]; /* input queue */
66 static int c_first = 0; /* first character in queue */
67 static int c_last = 0; /* last character in queue */
68
69 static GC ourgc = 0; /* our graphics context for drawing */
70
71 static Colormap ourmap = 0; /* our color map */
72
73 #define IC_X11 0
74 #define IC_IOCTL 1
75 #define IC_READ 2
76
77 static int inpcheck; /* whence to check input */
78
79 extern char *malloc();
80
81 static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
82 x11_getcur(), x11_comout(), x11_comin(), x11_flush();
83
84 static int std_comin(), std_comout();
85
86 static struct driver x11_driver = {
87 x11_close, x11_clear, x11_paintr, x11_getcur,
88 NULL, NULL, x11_flush, 1.0
89 };
90
91 static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
92 getevent(), getkey(), fixwindow(), x11_getc();
93 static unsigned long true_pixel();
94
95
96 struct driver *
97 x11_init(name, id) /* initialize driver */
98 char *name, *id;
99 {
100 extern char *getenv();
101 char *gv;
102 int nplanes;
103 XSetWindowAttributes ourwinattr;
104 XWMHints ourxwmhints;
105 XSizeHints oursizhints;
106 /* open display server */
107 ourdisplay = XOpenDisplay(NULL);
108 if (ourdisplay == NULL) {
109 stderr_v("cannot open X-windows; DISPLAY variable set?\n");
110 return(NULL);
111 }
112 /* find a usable visual */
113 nplanes = DisplayPlanes(ourdisplay, ourscreen);
114 if (XMatchVisualInfo(ourdisplay,ourscreen,
115 24,TrueColor,&ourvinfo) ||
116 XMatchVisualInfo(ourdisplay,ourscreen,
117 24,DirectColor,&ourvinfo)) {
118 ourblack = 0;
119 ourwhite = ourvinfo.red_mask |
120 ourvinfo.green_mask |
121 ourvinfo.blue_mask ;
122 } else {
123 if (nplanes < 4) {
124 stderr_v("not enough colors\n");
125 return(NULL);
126 }
127 if (!XMatchVisualInfo(ourdisplay,ourscreen,
128 nplanes,PseudoColor,&ourvinfo) &&
129 !XMatchVisualInfo(ourdisplay,ourscreen,
130 nplanes,GrayScale,&ourvinfo)) {
131 stderr_v("unsupported visual type\n");
132 return(NULL);
133 }
134 ourblack = BlackPixel(ourdisplay,ourscreen);
135 ourwhite = WhitePixel(ourdisplay,ourscreen);
136 }
137 /* set gamma */
138 if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
139 || (gv = getenv("DISPLAY_GAMMA")) != NULL)
140 make_gmap(atof(gv));
141 else
142 make_gmap(GAMMA);
143 /* X11 command line or no? */
144 if (!strcmp(name, "x11"))
145 comheight = COMHEIGHT;
146 else /* "x11d" */
147 comheight = 0;
148 /* open window */
149 ourwinattr.background_pixel = ourblack;
150 ourwinattr.border_pixel = ourblack;
151 /* this is stupid */
152 ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
153 ourvinfo.visual, AllocNone);
154 gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
155 DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
156 DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
157 BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
158 CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr);
159 if (gwind == 0) {
160 stderr_v("cannot create window\n");
161 return(NULL);
162 }
163 XStoreName(ourdisplay, gwind, id);
164 /* create a cursor */
165 pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
166 ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
167 ourxwmhints.flags = InputHint|IconPixmapHint;
168 ourxwmhints.input = True;
169 ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
170 gwind, x11icon_bits, x11icon_width, x11icon_height);
171 XSetWMHints(ourdisplay, gwind, &ourxwmhints);
172 oursizhints.min_width = MINWIDTH;
173 oursizhints.min_height = MINHEIGHT+comheight;
174 oursizhints.flags = PMinSize;
175 XSetNormalHints(ourdisplay, gwind, &oursizhints);
176 XSelectInput(ourdisplay, gwind, ExposureMask);
177 XMapWindow(ourdisplay, gwind);
178 XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
179 gwidth = levptr(XExposeEvent)->width;
180 gheight = levptr(XExposeEvent)->height - comheight;
181 x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
182 x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
183 x11_driver.inpready = 0;
184 mapped = 1;
185 /* set i/o vectors */
186 if (comheight) {
187 x11_driver.comin = x11_comin;
188 x11_driver.comout = x11_comout;
189 cmdvec = x11_comout;
190 if (wrnvec != NULL)
191 wrnvec = x11_errout;
192 inpcheck = IC_X11;
193 } else {
194 x11_driver.comin = std_comin;
195 x11_driver.comout = std_comout;
196 cmdvec = std_comout;
197 inpcheck = IC_IOCTL;
198 }
199 return(&x11_driver);
200 }
201
202
203 static
204 x11_close() /* close our display */
205 {
206 cmdvec = NULL; /* reset error vectors */
207 if (wrnvec != NULL)
208 wrnvec = stderr_v;
209 if (ourdisplay == NULL)
210 return;
211 if (comline != NULL) {
212 xt_close(comline);
213 comline = NULL;
214 }
215 freepixels();
216 XFreeGC(ourdisplay, ourgc);
217 XDestroyWindow(ourdisplay, gwind);
218 gwind = 0;
219 ourgc = 0;
220 XFreeCursor(ourdisplay, pickcursor);
221 XCloseDisplay(ourdisplay);
222 ourdisplay = NULL;
223 }
224
225
226 static
227 x11_clear(xres, yres) /* clear our display */
228 int xres, yres;
229 {
230 /* check limits */
231 if (xres < MINWIDTH)
232 xres = MINWIDTH;
233 if (yres < MINHEIGHT)
234 yres = MINHEIGHT;
235 /* resize window */
236 if (xres != gwidth || yres != gheight) {
237 XSelectInput(ourdisplay, gwind, 0);
238 XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
239 gwidth = xres;
240 gheight = yres;
241 XFlush(ourdisplay);
242 sleep(2); /* wait for window manager */
243 XSync(ourdisplay, 1); /* discard input */
244 }
245 XClearWindow(ourdisplay, gwind);
246 /* reinitialize color table */
247 if (ourvinfo.class == PseudoColor || ourvinfo.class == GrayScale)
248 if (getpixels() == 0)
249 stderr_v("cannot allocate colors\n");
250 else
251 new_ctab(ncolors);
252 /* get new command line */
253 if (comline != NULL)
254 xt_close(comline);
255 if (comheight) {
256 comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
257 comheight, 0, ourblack, ourwhite, COMFN);
258 if (comline == NULL) {
259 stderr_v("Cannot open command line window\n");
260 quit(1);
261 }
262 XSelectInput(ourdisplay, comline->w, ExposureMask);
263 /* remove earmuffs */
264 XSelectInput(ourdisplay, gwind,
265 StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
266 } else /* remove earmuffs */
267 XSelectInput(ourdisplay, gwind,
268 StructureNotifyMask|ExposureMask|ButtonPressMask);
269 }
270
271
272 static
273 x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
274 COLOR col;
275 int xmin, ymin, xmax, ymax;
276 {
277 unsigned long pixel;
278
279 if (!mapped)
280 return;
281 if (ncolors > 0)
282 pixel = pixval[get_pixel(col, xnewcolr)];
283 else
284 pixel = true_pixel(col);
285 XSetForeground(ourdisplay, ourgc, pixel);
286 XFillRectangle(ourdisplay, gwind,
287 ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
288 }
289
290
291 static
292 x11_flush() /* flush output */
293 {
294 char buf[256];
295 int n;
296 /* check for input */
297 XNoOp(ourdisplay);
298 n = XPending(ourdisplay); /* from X server */
299 while (n-- > 0)
300 getevent();
301 #ifdef FNDELAY
302 if (inpcheck == IC_IOCTL) { /* from stdin */
303 #ifdef FIONREAD
304 if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
305 #else
306 if (1) {
307 #endif
308 if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
309 stderr_v("Cannot change input mode\n");
310 quit(1);
311 }
312 inpcheck = IC_READ;
313 } else
314 x11_driver.inpready += n;
315 }
316 if (inpcheck == IC_READ) {
317 n = read(fileno(stdin), buf, sizeof(buf)-1);
318 if (n > 0) {
319 buf[n] = '\0';
320 tocombuf(buf, &x11_driver);
321 }
322 }
323 #endif
324 }
325
326
327 static
328 x11_comin(inp, prompt) /* read in a command line */
329 char *inp, *prompt;
330 {
331 if (prompt != NULL) {
332 x11_flush(); /* make sure we get everything */
333 if (fromcombuf(inp, &x11_driver))
334 return;
335 xt_puts(prompt, comline);
336 }
337 xt_cursor(comline, TBLKCURS);
338 editline(inp, x11_getc, x11_comout);
339 xt_cursor(comline, TNOCURS);
340 }
341
342
343 static
344 x11_comout(outp) /* output a string to command line */
345 char *outp;
346 {
347 if (comline == NULL)
348 return;
349 xt_puts(outp, comline);
350 if (outp[strlen(outp)-1] == '\n')
351 XFlush(ourdisplay);
352 }
353
354
355 static
356 x11_errout(msg) /* output an error message */
357 char *msg;
358 {
359 stderr_v(msg); /* send to stderr also! */
360 x11_comout(msg);
361 }
362
363
364 static
365 std_comin(inp, prompt) /* read in command line from stdin */
366 char *inp, *prompt;
367 {
368 extern char *gets();
369
370 if (prompt != NULL) {
371 if (fromcombuf(inp, &x11_driver))
372 return;
373 if (!x11_driver.inpready)
374 fputs(prompt, stdout);
375 }
376 if (gets(inp) == NULL) {
377 strcpy(inp, "quit");
378 return;
379 }
380 x11_driver.inpready -= strlen(inp) + 1;
381 if (x11_driver.inpready < 0)
382 x11_driver.inpready = 0;
383 }
384
385
386 static
387 std_comout(outp) /* write out string to stdout */
388 char *outp;
389 {
390 fputs(outp, stdout);
391 fflush(stdout);
392 }
393
394
395 static int
396 x11_getcur(xp, yp) /* get cursor position */
397 int *xp, *yp;
398 {
399 while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
400 GrabModeAsync, GrabModeAsync, None, pickcursor,
401 CurrentTime) != GrabSuccess)
402 sleep(2);
403
404 do
405 getevent();
406 while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
407 *xp = levptr(XButtonPressedEvent)->x;
408 *yp = gheight-1 - levptr(XButtonPressedEvent)->y;
409 XUngrabPointer(ourdisplay, CurrentTime);
410 XFlush(ourdisplay); /* insure release */
411 if (c_last > c_first) /* key pressed */
412 return(x11_getc());
413 /* button pressed */
414 if (levptr(XButtonPressedEvent)->button == Button1)
415 return(MB1);
416 if (levptr(XButtonPressedEvent)->button == Button2)
417 return(MB2);
418 if (levptr(XButtonPressedEvent)->button == Button3)
419 return(MB3);
420 return(ABORT);
421 }
422
423
424 static
425 xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
426 int ndx;
427 int r, g, b;
428 {
429 XColor xcolor;
430
431 xcolor.pixel = pixval[ndx];
432 xcolor.red = r << 8;
433 xcolor.green = g << 8;
434 xcolor.blue = b << 8;
435 xcolor.flags = DoRed|DoGreen|DoBlue;
436
437 XStoreColor(ourdisplay, ourmap, &xcolor);
438 }
439
440
441 static int
442 getpixels() /* get the color map */
443 {
444 XColor thiscolor;
445 register int i, j;
446
447 if (ncolors > 0)
448 return(ncolors);
449 if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
450 ourmap = DefaultColormap(ourdisplay,ourscreen);
451 goto loop;
452 }
453 newmap:
454 ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
455 loop:
456 for (ncolors = ourvinfo.colormap_size;
457 ncolors > ourvinfo.colormap_size/3;
458 ncolors = ncolors*.937) {
459 pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
460 if (pixval == NULL)
461 return(ncolors = 0);
462 if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
463 break;
464 free((char *)pixval);
465 pixval = NULL;
466 }
467 if (pixval == NULL) {
468 if (ourmap == DefaultColormap(ourdisplay,ourscreen))
469 goto newmap; /* try it with our map */
470 else
471 return(ncolors = 0); /* failed */
472 }
473 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
474 for (i = 0; i < ncolors; i++) { /* reset black and white */
475 if (pixval[i] != ourblack && pixval[i] != ourwhite)
476 continue;
477 thiscolor.pixel = pixval[i];
478 thiscolor.flags = DoRed|DoGreen|DoBlue;
479 XQueryColor(ourdisplay,
480 DefaultColormap(ourdisplay,ourscreen),
481 &thiscolor);
482 XStoreColor(ourdisplay, ourmap, &thiscolor);
483 for (j = i; j+1 < ncolors; j++)
484 pixval[j] = pixval[j+1];
485 ncolors--;
486 i--;
487 }
488 XSetWindowColormap(ourdisplay, gwind, ourmap);
489 return(ncolors);
490 }
491
492
493 static
494 freepixels() /* free our pixels */
495 {
496 if (ncolors == 0)
497 return;
498 XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
499 free((char *)pixval);
500 pixval = NULL;
501 ncolors = 0;
502 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
503 XFreeColormap(ourdisplay, ourmap);
504 ourmap = 0;
505 }
506
507
508 static unsigned long
509 true_pixel(col) /* return true pixel value for color */
510 COLOR col;
511 {
512 unsigned long rval;
513 BYTE rgb[3];
514
515 map_color(rgb, col);
516 rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
517 rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
518 rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
519 return(rval);
520 }
521
522
523 static int
524 x11_getc() /* get a command character */
525 {
526 while (c_last <= c_first) {
527 c_first = c_last = 0; /* reset */
528 getevent(); /* wait for key */
529 }
530 x11_driver.inpready--;
531 return(c_queue[c_first++]);
532 }
533
534
535 static
536 getevent() /* get next event */
537 {
538 XNextEvent(ourdisplay, levptr(XEvent));
539 switch (levptr(XEvent)->type) {
540 case ConfigureNotify:
541 resizewindow(levptr(XConfigureEvent));
542 break;
543 case UnmapNotify:
544 mapped = 0;
545 freepixels();
546 break;
547 case MapNotify:
548 if (ourvinfo.class == PseudoColor ||
549 ourvinfo.class == GrayScale)
550 if (getpixels() == 0)
551 stderr_v("Cannot allocate colors\n");
552 else
553 new_ctab(ncolors);
554 mapped = 1;
555 break;
556 case Expose:
557 fixwindow(levptr(XExposeEvent));
558 break;
559 case KeyPress:
560 getkey(levptr(XKeyPressedEvent));
561 break;
562 case ButtonPress:
563 break;
564 }
565 }
566
567
568 static
569 getkey(ekey) /* get input key */
570 register XKeyPressedEvent *ekey;
571 {
572 register int n;
573
574 n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
575 NULL, NULL);
576 c_last += n;
577 x11_driver.inpready += n;
578 }
579
580
581 static
582 fixwindow(eexp) /* repair damage to window */
583 register XExposeEvent *eexp;
584 {
585 char buf[80];
586
587 if (eexp->window == gwind) {
588 sprintf(buf, "repaint %d %d %d %d\n",
589 eexp->x, gheight - eexp->y - eexp->height,
590 eexp->x + eexp->width, gheight - eexp->y);
591 tocombuf(buf, &x11_driver);
592 } else if (eexp->window == comline->w) {
593 if (eexp->count == 0)
594 xt_redraw(comline);
595 }
596 }
597
598
599 static
600 resizewindow(ersz) /* resize window */
601 register XConfigureEvent *ersz;
602 {
603 if (ersz->width == gwidth && ersz->height-comheight == gheight)
604 return;
605
606 gwidth = ersz->width;
607 gheight = ersz->height-comheight;
608 x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
609 x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
610
611 tocombuf("new\n", &x11_driver);
612 }