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root/radiance/ray/src/rt/x11.c
Revision: 2.23
Committed: Mon Dec 12 16:47:29 1994 UTC (29 years, 4 months ago) by greg
Content type: text/plain
Branch: MAIN
Changes since 2.22: +5 -0 lines
Log Message:
added appropriate headers for Solaris (I hope)

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 #ifdef sparc
18 #include <sys/conf.h>
19 #include <sys/file.h>
20 #include <sys/filio.h>
21 #endif
22
23 #include <X11/Xlib.h>
24 #include <X11/cursorfont.h>
25 #include <X11/Xutil.h>
26
27 #include "color.h"
28 #include "driver.h"
29 #include "x11twind.h"
30 #include "x11icon.h"
31
32 #define GAMMA 2.2 /* default exponent correction */
33
34 #define MINWIDTH (32*COMCW) /* minimum graphics window width */
35 #define MINHEIGHT (MINWIDTH/2) /* minimum graphics window height */
36
37 #define BORWIDTH 5 /* border width */
38 #define COMHEIGHT (COMLH*COMCH) /* command line height (pixels) */
39
40 #define COMFN "8x13" /* command line font name */
41 #define COMLH 3 /* number of command lines */
42 #define COMCW 8 /* approx. character width (pixels) */
43 #define COMCH 14 /* approx. character height (pixels) */
44
45 #define ourscreen DefaultScreen(ourdisplay)
46 #define ourroot RootWindow(ourdisplay,ourscreen)
47
48 #define levptr(etype) ((etype *)&currentevent)
49
50 static XEvent currentevent; /* current event */
51
52 static int ncolors = 0; /* color table size */
53 static int mapped = 0; /* window is mapped? */
54 static unsigned long *pixval = NULL; /* allocated pixels */
55 static unsigned long ourblack=0, ourwhite=1;
56
57 static Display *ourdisplay = NULL; /* our display */
58
59 static XVisualInfo ourvinfo; /* our visual information */
60
61 static Window gwind = 0; /* our graphics window */
62
63 static Cursor pickcursor = 0; /* cursor used for picking */
64
65 static int gwidth, gheight; /* graphics window size */
66
67 static int comheight; /* desired comline height */
68 static TEXTWIND *comline = NULL; /* our command line */
69
70 static char c_queue[64]; /* input queue */
71 static int c_first = 0; /* first character in queue */
72 static int c_last = 0; /* last character in queue */
73
74 static GC ourgc = 0; /* our graphics context for drawing */
75
76 static Colormap ourmap = 0; /* our color map */
77
78 #define IC_X11 0
79 #define IC_IOCTL 1
80 #define IC_READ 2
81
82 static int inpcheck; /* whence to check input */
83
84 extern char *malloc();
85
86 static int x11_close(), x11_clear(), x11_paintr(), x11_errout(),
87 x11_getcur(), x11_comout(), x11_comin(), x11_flush();
88
89 static int std_comin(), std_comout();
90
91 static struct driver x11_driver = {
92 x11_close, x11_clear, x11_paintr, x11_getcur,
93 NULL, NULL, x11_flush, 1.0
94 };
95
96 static int getpixels(), xnewcolr(), freepixels(), resizewindow(),
97 getevent(), getkey(), fixwindow(), x11_getc();
98 static unsigned long true_pixel();
99
100
101 struct driver *
102 x11_init(name, id) /* initialize driver */
103 char *name, *id;
104 {
105 extern char *getenv();
106 char *gv;
107 int nplanes;
108 XSetWindowAttributes ourwinattr;
109 XWMHints ourxwmhints;
110 XSizeHints oursizhints;
111 /* open display server */
112 ourdisplay = XOpenDisplay(NULL);
113 if (ourdisplay == NULL) {
114 stderr_v("cannot open X-windows; DISPLAY variable set?\n");
115 return(NULL);
116 }
117 /* find a usable visual */
118 nplanes = DisplayPlanes(ourdisplay, ourscreen);
119 if (XMatchVisualInfo(ourdisplay,ourscreen,
120 24,TrueColor,&ourvinfo) ||
121 XMatchVisualInfo(ourdisplay,ourscreen,
122 24,DirectColor,&ourvinfo)) {
123 ourblack = 0;
124 ourwhite = ourvinfo.red_mask |
125 ourvinfo.green_mask |
126 ourvinfo.blue_mask ;
127 } else {
128 if (nplanes < 4) {
129 stderr_v("not enough colors\n");
130 return(NULL);
131 }
132 if (!XMatchVisualInfo(ourdisplay,ourscreen,
133 nplanes,PseudoColor,&ourvinfo) &&
134 !XMatchVisualInfo(ourdisplay,ourscreen,
135 nplanes,GrayScale,&ourvinfo)) {
136 stderr_v("unsupported visual type\n");
137 return(NULL);
138 }
139 ourblack = BlackPixel(ourdisplay,ourscreen);
140 ourwhite = WhitePixel(ourdisplay,ourscreen);
141 }
142 /* set gamma */
143 if ((gv = XGetDefault(ourdisplay, "radiance", "gamma")) != NULL
144 || (gv = getenv("DISPLAY_GAMMA")) != NULL)
145 make_gmap(atof(gv));
146 else
147 make_gmap(GAMMA);
148 /* X11 command line or no? */
149 if (!strcmp(name, "x11"))
150 comheight = COMHEIGHT;
151 else /* "x11d" */
152 comheight = 0;
153 /* open window */
154 ourwinattr.background_pixel = ourblack;
155 ourwinattr.border_pixel = ourblack;
156 /* this is stupid */
157 ourwinattr.colormap = XCreateColormap(ourdisplay, ourroot,
158 ourvinfo.visual, AllocNone);
159 gwind = XCreateWindow(ourdisplay, ourroot, 0, 0,
160 DisplayWidth(ourdisplay,ourscreen)-2*BORWIDTH,
161 DisplayHeight(ourdisplay,ourscreen)-2*BORWIDTH,
162 BORWIDTH, ourvinfo.depth, InputOutput, ourvinfo.visual,
163 CWBackPixel|CWBorderPixel|CWColormap, &ourwinattr);
164 if (gwind == 0) {
165 stderr_v("cannot create window\n");
166 return(NULL);
167 }
168 XStoreName(ourdisplay, gwind, id);
169 /* create a cursor */
170 pickcursor = XCreateFontCursor(ourdisplay, XC_diamond_cross);
171 ourgc = XCreateGC(ourdisplay, gwind, 0, NULL);
172 ourxwmhints.flags = InputHint|IconPixmapHint;
173 ourxwmhints.input = True;
174 ourxwmhints.icon_pixmap = XCreateBitmapFromData(ourdisplay,
175 gwind, x11icon_bits, x11icon_width, x11icon_height);
176 XSetWMHints(ourdisplay, gwind, &ourxwmhints);
177 oursizhints.min_width = MINWIDTH;
178 oursizhints.min_height = MINHEIGHT+comheight;
179 oursizhints.flags = PMinSize;
180 XSetNormalHints(ourdisplay, gwind, &oursizhints);
181 XSelectInput(ourdisplay, gwind, ExposureMask);
182 XMapWindow(ourdisplay, gwind);
183 XWindowEvent(ourdisplay, gwind, ExposureMask, levptr(XEvent));
184 gwidth = levptr(XExposeEvent)->width;
185 gheight = levptr(XExposeEvent)->height - comheight;
186 x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
187 x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
188 x11_driver.inpready = 0;
189 mapped = 1;
190 /* set i/o vectors */
191 if (comheight) {
192 x11_driver.comin = x11_comin;
193 x11_driver.comout = x11_comout;
194 cmdvec = x11_comout;
195 if (wrnvec != NULL)
196 wrnvec = x11_errout;
197 inpcheck = IC_X11;
198 } else {
199 x11_driver.comin = std_comin;
200 x11_driver.comout = std_comout;
201 cmdvec = std_comout;
202 inpcheck = IC_IOCTL;
203 }
204 return(&x11_driver);
205 }
206
207
208 static
209 x11_close() /* close our display */
210 {
211 cmdvec = NULL; /* reset error vectors */
212 if (wrnvec != NULL)
213 wrnvec = stderr_v;
214 if (ourdisplay == NULL)
215 return;
216 if (comline != NULL) {
217 xt_close(comline);
218 comline = NULL;
219 }
220 freepixels();
221 XFreeGC(ourdisplay, ourgc);
222 XDestroyWindow(ourdisplay, gwind);
223 gwind = 0;
224 ourgc = 0;
225 XFreeCursor(ourdisplay, pickcursor);
226 XCloseDisplay(ourdisplay);
227 ourdisplay = NULL;
228 }
229
230
231 static
232 x11_clear(xres, yres) /* clear our display */
233 int xres, yres;
234 {
235 /* check limits */
236 if (xres < MINWIDTH)
237 xres = MINWIDTH;
238 if (yres < MINHEIGHT)
239 yres = MINHEIGHT;
240 /* resize window */
241 if (xres != gwidth || yres != gheight) {
242 XSelectInput(ourdisplay, gwind, 0);
243 XResizeWindow(ourdisplay, gwind, xres, yres+comheight);
244 gwidth = xres;
245 gheight = yres;
246 XFlush(ourdisplay);
247 sleep(2); /* wait for window manager */
248 XSync(ourdisplay, 1); /* discard input */
249 }
250 XClearWindow(ourdisplay, gwind);
251 /* reinitialize color table */
252 if (ourvinfo.class == PseudoColor || ourvinfo.class == GrayScale)
253 if (getpixels() == 0)
254 stderr_v("cannot allocate colors\n");
255 else
256 new_ctab(ncolors);
257 /* get new command line */
258 if (comline != NULL)
259 xt_close(comline);
260 if (comheight) {
261 comline = xt_open(ourdisplay, gwind, 0, gheight, gwidth,
262 comheight, 0, ourblack, ourwhite, COMFN);
263 if (comline == NULL) {
264 stderr_v("Cannot open command line window\n");
265 quit(1);
266 }
267 XSelectInput(ourdisplay, comline->w, ExposureMask);
268 /* remove earmuffs */
269 XSelectInput(ourdisplay, gwind,
270 StructureNotifyMask|ExposureMask|KeyPressMask|ButtonPressMask);
271 } else /* remove earmuffs */
272 XSelectInput(ourdisplay, gwind,
273 StructureNotifyMask|ExposureMask|ButtonPressMask);
274 }
275
276
277 static
278 x11_paintr(col, xmin, ymin, xmax, ymax) /* fill a rectangle */
279 COLOR col;
280 int xmin, ymin, xmax, ymax;
281 {
282 unsigned long pixel;
283
284 if (!mapped)
285 return;
286 if (ncolors > 0)
287 pixel = pixval[get_pixel(col, xnewcolr)];
288 else
289 pixel = true_pixel(col);
290 XSetForeground(ourdisplay, ourgc, pixel);
291 XFillRectangle(ourdisplay, gwind,
292 ourgc, xmin, gheight-ymax, xmax-xmin, ymax-ymin);
293 }
294
295
296 static
297 x11_flush() /* flush output */
298 {
299 char buf[256];
300 int n;
301 /* check for input */
302 XNoOp(ourdisplay);
303 n = XPending(ourdisplay); /* from X server */
304 while (n-- > 0)
305 getevent();
306 #ifdef FNDELAY
307 if (inpcheck == IC_IOCTL) { /* from stdin */
308 #ifdef FIONREAD
309 if (ioctl(fileno(stdin), FIONREAD, &n) < 0) {
310 #else
311 if (1) {
312 #endif
313 if (fcntl(fileno(stdin), F_SETFL, FNDELAY) < 0) {
314 stderr_v("Cannot change input mode\n");
315 quit(1);
316 }
317 inpcheck = IC_READ;
318 } else
319 x11_driver.inpready += n;
320 }
321 if (inpcheck == IC_READ) {
322 n = read(fileno(stdin), buf, sizeof(buf)-1);
323 if (n > 0) {
324 buf[n] = '\0';
325 tocombuf(buf, &x11_driver);
326 }
327 }
328 #endif
329 }
330
331
332 static
333 x11_comin(inp, prompt) /* read in a command line */
334 char *inp, *prompt;
335 {
336 if (prompt != NULL) {
337 x11_flush(); /* make sure we get everything */
338 if (fromcombuf(inp, &x11_driver))
339 return;
340 xt_puts(prompt, comline);
341 }
342 xt_cursor(comline, TBLKCURS);
343 editline(inp, x11_getc, x11_comout);
344 xt_cursor(comline, TNOCURS);
345 }
346
347
348 static
349 x11_comout(outp) /* output a string to command line */
350 char *outp;
351 {
352 if (comline == NULL)
353 return;
354 xt_puts(outp, comline);
355 if (outp[strlen(outp)-1] == '\n')
356 XFlush(ourdisplay);
357 }
358
359
360 static
361 x11_errout(msg) /* output an error message */
362 char *msg;
363 {
364 stderr_v(msg); /* send to stderr also! */
365 x11_comout(msg);
366 }
367
368
369 static
370 std_comin(inp, prompt) /* read in command line from stdin */
371 char *inp, *prompt;
372 {
373 extern char *gets();
374
375 if (prompt != NULL) {
376 if (fromcombuf(inp, &x11_driver))
377 return;
378 if (!x11_driver.inpready)
379 fputs(prompt, stdout);
380 }
381 if (gets(inp) == NULL) {
382 strcpy(inp, "quit");
383 return;
384 }
385 x11_driver.inpready -= strlen(inp) + 1;
386 if (x11_driver.inpready < 0)
387 x11_driver.inpready = 0;
388 }
389
390
391 static
392 std_comout(outp) /* write out string to stdout */
393 char *outp;
394 {
395 fputs(outp, stdout);
396 fflush(stdout);
397 }
398
399
400 static int
401 x11_getcur(xp, yp) /* get cursor position */
402 int *xp, *yp;
403 {
404 while (XGrabPointer(ourdisplay, gwind, True, ButtonPressMask,
405 GrabModeAsync, GrabModeAsync, None, pickcursor,
406 CurrentTime) != GrabSuccess)
407 sleep(2);
408
409 do
410 getevent();
411 while (c_last <= c_first && levptr(XEvent)->type != ButtonPress);
412 *xp = levptr(XButtonPressedEvent)->x;
413 *yp = gheight-1 - levptr(XButtonPressedEvent)->y;
414 XUngrabPointer(ourdisplay, CurrentTime);
415 XFlush(ourdisplay); /* insure release */
416 if (c_last > c_first) /* key pressed */
417 return(x11_getc());
418 /* button pressed */
419 if (levptr(XButtonPressedEvent)->button == Button1)
420 return(MB1);
421 if (levptr(XButtonPressedEvent)->button == Button2)
422 return(MB2);
423 if (levptr(XButtonPressedEvent)->button == Button3)
424 return(MB3);
425 return(ABORT);
426 }
427
428
429 static
430 xnewcolr(ndx, r, g, b) /* enter a color into hardware table */
431 int ndx;
432 int r, g, b;
433 {
434 XColor xcolor;
435
436 xcolor.pixel = pixval[ndx];
437 xcolor.red = r << 8;
438 xcolor.green = g << 8;
439 xcolor.blue = b << 8;
440 xcolor.flags = DoRed|DoGreen|DoBlue;
441
442 XStoreColor(ourdisplay, ourmap, &xcolor);
443 }
444
445
446 static int
447 getpixels() /* get the color map */
448 {
449 XColor thiscolor;
450 register int i, j;
451
452 if (ncolors > 0)
453 return(ncolors);
454 if (ourvinfo.visual == DefaultVisual(ourdisplay,ourscreen)) {
455 ourmap = DefaultColormap(ourdisplay,ourscreen);
456 goto loop;
457 }
458 newmap:
459 ourmap = XCreateColormap(ourdisplay,gwind,ourvinfo.visual,AllocNone);
460 loop:
461 for (ncolors = ourvinfo.colormap_size;
462 ncolors > ourvinfo.colormap_size/3;
463 ncolors = ncolors*.937) {
464 pixval = (unsigned long *)malloc(ncolors*sizeof(unsigned long));
465 if (pixval == NULL)
466 return(ncolors = 0);
467 if (XAllocColorCells(ourdisplay,ourmap,0,NULL,0,pixval,ncolors))
468 break;
469 free((char *)pixval);
470 pixval = NULL;
471 }
472 if (pixval == NULL) {
473 if (ourmap == DefaultColormap(ourdisplay,ourscreen))
474 goto newmap; /* try it with our map */
475 else
476 return(ncolors = 0); /* failed */
477 }
478 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
479 for (i = 0; i < ncolors; i++) { /* reset black and white */
480 if (pixval[i] != ourblack && pixval[i] != ourwhite)
481 continue;
482 thiscolor.pixel = pixval[i];
483 thiscolor.flags = DoRed|DoGreen|DoBlue;
484 XQueryColor(ourdisplay,
485 DefaultColormap(ourdisplay,ourscreen),
486 &thiscolor);
487 XStoreColor(ourdisplay, ourmap, &thiscolor);
488 for (j = i; j+1 < ncolors; j++)
489 pixval[j] = pixval[j+1];
490 ncolors--;
491 i--;
492 }
493 XSetWindowColormap(ourdisplay, gwind, ourmap);
494 return(ncolors);
495 }
496
497
498 static
499 freepixels() /* free our pixels */
500 {
501 if (ncolors == 0)
502 return;
503 XFreeColors(ourdisplay,ourmap,pixval,ncolors,0L);
504 free((char *)pixval);
505 pixval = NULL;
506 ncolors = 0;
507 if (ourmap != DefaultColormap(ourdisplay,ourscreen))
508 XFreeColormap(ourdisplay, ourmap);
509 ourmap = 0;
510 }
511
512
513 static unsigned long
514 true_pixel(col) /* return true pixel value for color */
515 COLOR col;
516 {
517 unsigned long rval;
518 BYTE rgb[3];
519
520 map_color(rgb, col);
521 rval = ourvinfo.red_mask*rgb[RED]/255 & ourvinfo.red_mask;
522 rval |= ourvinfo.green_mask*rgb[GRN]/255 & ourvinfo.green_mask;
523 rval |= ourvinfo.blue_mask*rgb[BLU]/255 & ourvinfo.blue_mask;
524 return(rval);
525 }
526
527
528 static int
529 x11_getc() /* get a command character */
530 {
531 while (c_last <= c_first) {
532 c_first = c_last = 0; /* reset */
533 getevent(); /* wait for key */
534 }
535 x11_driver.inpready--;
536 return(c_queue[c_first++]);
537 }
538
539
540 static
541 getevent() /* get next event */
542 {
543 XNextEvent(ourdisplay, levptr(XEvent));
544 switch (levptr(XEvent)->type) {
545 case ConfigureNotify:
546 resizewindow(levptr(XConfigureEvent));
547 break;
548 case UnmapNotify:
549 mapped = 0;
550 freepixels();
551 break;
552 case MapNotify:
553 if (ourvinfo.class == PseudoColor ||
554 ourvinfo.class == GrayScale)
555 if (getpixels() == 0)
556 stderr_v("Cannot allocate colors\n");
557 else
558 new_ctab(ncolors);
559 mapped = 1;
560 break;
561 case Expose:
562 fixwindow(levptr(XExposeEvent));
563 break;
564 case KeyPress:
565 getkey(levptr(XKeyPressedEvent));
566 break;
567 case ButtonPress:
568 break;
569 }
570 }
571
572
573 static
574 getkey(ekey) /* get input key */
575 register XKeyPressedEvent *ekey;
576 {
577 register int n;
578
579 n = XLookupString(ekey, c_queue+c_last, sizeof(c_queue)-c_last,
580 NULL, NULL);
581 c_last += n;
582 x11_driver.inpready += n;
583 }
584
585
586 static
587 fixwindow(eexp) /* repair damage to window */
588 register XExposeEvent *eexp;
589 {
590 char buf[80];
591
592 if (eexp->window == gwind) {
593 sprintf(buf, "repaint %d %d %d %d\n",
594 eexp->x, gheight - eexp->y - eexp->height,
595 eexp->x + eexp->width, gheight - eexp->y);
596 tocombuf(buf, &x11_driver);
597 } else if (eexp->window == comline->w) {
598 if (eexp->count == 0)
599 xt_redraw(comline);
600 }
601 }
602
603
604 static
605 resizewindow(ersz) /* resize window */
606 register XConfigureEvent *ersz;
607 {
608 if (ersz->width == gwidth && ersz->height-comheight == gheight)
609 return;
610
611 gwidth = ersz->width;
612 gheight = ersz->height-comheight;
613 x11_driver.xsiz = gwidth < MINWIDTH ? MINWIDTH : gwidth;
614 x11_driver.ysiz = gheight < MINHEIGHT ? MINHEIGHT : gheight;
615
616 tocombuf("new\n", &x11_driver);
617 }