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Date:: Wed Jul 5 22:27:26 2006 UTC
Message:: Fix resize error under KDE (Bart Locanthi)
Actions:: History | Blame | Raw File
1 /*
2  * Some of the stuff in this file is not X-dependent and should be elsewhere.
3  */
4 #include <u.h>
5 #include "x11-inc.h"
6 #include <libc.h>
7 #include <draw.h>
8 #include <memdraw.h>
9 #include <keyboard.h>
10 #include <mouse.h>
11 #include <cursor.h>
12 #include "x11-memdraw.h"
13 
14 static int parsewinsize(char*, Rectangle*, int*);
15 
16 static void	plan9cmap(void);
17 static int	setupcmap(XWindow);
18 static XGC	xgc(XDrawable, int, int);
19 
20 Xprivate _x;
21 
22 static int
23 xerror(XDisplay *d, XErrorEvent *e)
24 {
25 	char buf[200];
26 
27 	if(e->request_code == 42) /* XSetInputFocus */
28 		return 0;
29 	if(e->request_code == 18) /* XChangeProperty */
30 		return 0;
31 	/*
32 	 * BadDrawable happens in apps that get resized a LOT,
33 	 * e.g. when KDE is configured to resize continuously
34 	 * during a window drag.
35 	 */
36 	if(e->error_code == 9) /* BadDrawable */
37 		return 0;
38 
39 	fprint(2, "X error: error_code=%d, request_code=%d, minor=%d disp=%p\n",
40 		e->error_code, e->request_code, e->minor_code, d);
41 	XGetErrorText(d, e->error_code, buf, sizeof buf);
42 	fprint(2, "%s\n", buf);
43 	return 0;
44 }
45 
46 static int
47 xioerror(XDisplay *d)
48 {
49 	/*print("X I/O error\n"); */
50 	sysfatal("X I/O error\n");
51 	abort();
52 	return -1;
53 }
54 
55 
56 Memimage*
57 _xattach(char *label, char *winsize)
58 {
59 	char *argv[2], *disp;
60 	int i, havemin, height, mask, n, width, x, xrootid, y;
61 	Rectangle r;
62 	XClassHint classhint;
63 	XDrawable pmid;
64 	XPixmapFormatValues *pfmt;
65 	XScreen *xscreen;
66 	XSetWindowAttributes attr;
67 	XSizeHints normalhint;
68 	XTextProperty name;
69 	XVisualInfo xvi;
70 	XWindow xrootwin;
71 	XWindowAttributes wattr;
72 	XWMHints hint;
73 	Atom atoms[2];
74 
75 	/*
76 	if(XInitThreads() == 0){
77 		fprint(2, "XInitThreads failed\n");
78 		abort();
79 	}
80 	*/
81 
82 	/*
83 	 * Connect to X server.
84 	 */
85 	_x.display = XOpenDisplay(NULL);
86 	if(_x.display == nil){
87 		disp = getenv("DISPLAY");
88 		werrstr("XOpenDisplay %s: %r", disp ? disp : ":0");
89 		free(disp);
90 		return nil;
91 	}
92 	_x.fd = ConnectionNumber(_x.display);
93 	XSetErrorHandler(xerror);
94 	XSetIOErrorHandler(xioerror);
95 	xrootid = DefaultScreen(_x.display);
96 	xrootwin = DefaultRootWindow(_x.display);
97 
98 	/* 
99 	 * Figure out underlying screen format.
100 	 */
101 	if(XMatchVisualInfo(_x.display, xrootid, 16, TrueColor, &xvi)
102 	|| XMatchVisualInfo(_x.display, xrootid, 16, DirectColor, &xvi)){
103 		_x.vis = xvi.visual;
104 		_x.depth = 16;
105 	}
106 	else
107 	if(XMatchVisualInfo(_x.display, xrootid, 15, TrueColor, &xvi)
108 	|| XMatchVisualInfo(_x.display, xrootid, 15, DirectColor, &xvi)){
109 		_x.vis = xvi.visual;
110 		_x.depth = 15;
111 	}
112 	else
113 	if(XMatchVisualInfo(_x.display, xrootid, 24, TrueColor, &xvi)
114 	|| XMatchVisualInfo(_x.display, xrootid, 24, DirectColor, &xvi)){
115 		_x.vis = xvi.visual;
116 		_x.depth = 24;
117 	}
118 	else
119 	if(XMatchVisualInfo(_x.display, xrootid, 8, PseudoColor, &xvi)
120 	|| XMatchVisualInfo(_x.display, xrootid, 8, StaticColor, &xvi)){
121 		if(_x.depth > 8){
122 			werrstr("can't deal with colormapped depth %d screens",
123 				_x.depth);
124 			goto err0;
125 		}
126 		_x.vis = xvi.visual;
127 		_x.depth = 8;
128 	}
129 	else{
130 		_x.depth = DefaultDepth(_x.display, xrootid);
131 		if(_x.depth != 8){
132 			werrstr("can't understand depth %d screen", _x.depth);
133 			goto err0;
134 		}
135 		_x.vis = DefaultVisual(_x.display, xrootid);
136 	}
137 
138 	if(DefaultDepth(_x.display, xrootid) == _x.depth)
139 		_x.usetable = 1;
140 
141 	/*
142 	 * _x.depth is only the number of significant pixel bits,
143 	 * not the total number of pixel bits.  We need to walk the
144 	 * display list to find how many actual bits are used
145 	 * per pixel.
146 	 */
147 	_x.chan = 0;
148 	pfmt = XListPixmapFormats(_x.display, &n);
149 	for(i=0; i<n; i++){
150 		if(pfmt[i].depth == _x.depth){
151 			switch(pfmt[i].bits_per_pixel){
152 			case 1:	/* untested */
153 				_x.chan = GREY1;
154 				break;
155 			case 2:	/* untested */
156 				_x.chan = GREY2;
157 				break;
158 			case 4:	/* untested */
159 				_x.chan = GREY4;
160 				break;
161 			case 8:
162 				_x.chan = CMAP8;
163 				break;
164 			case 15:
165 				_x.chan = RGB15;
166 				break;
167 			case 16: /* how to tell RGB15? */
168 				_x.chan = RGB16;
169 				break;
170 			case 24: /* untested (impossible?) */
171 				_x.chan = RGB24;
172 				break;
173 			case 32:
174 				_x.chan = XRGB32;
175 				break;
176 			}
177 		}
178 	}
179 	if(_x.chan == 0){
180 		werrstr("could not determine screen pixel format");
181 		goto err0;
182 	}
183 
184 	/*
185 	 * Set up color map if necessary.
186 	 */
187 	xscreen = DefaultScreenOfDisplay(_x.display);
188 	_x.cmap = DefaultColormapOfScreen(xscreen);
189 	if(_x.vis->class != StaticColor){
190 		plan9cmap();
191 		setupcmap(xrootwin);
192 	}
193 
194 	/*
195 	 * We get to choose the initial rectangle size.
196 	 * This is arbitrary.  In theory we should read the
197 	 * command line and allow the traditional X options.
198 	 */
199 	mask = 0;
200 	x = 0;
201 	y = 0;
202 	if(winsize && winsize[0]){
203 		if(parsewinsize(winsize, &r, &havemin) < 0)
204 			sysfatal("%r");
205 	}else{
206 		/*
207 		 * Parse the various X resources.  Thanks to Peter Canning.
208 		 */
209 		char *screen_resources, *display_resources, *geom, 
210 			*geomrestype, *home, *file;
211 		XrmDatabase database;
212 		XrmValue geomres;
213 
214 		database = XrmGetDatabase(_x.display);
215 		screen_resources = XScreenResourceString(xscreen);
216 		if(screen_resources != nil){
217 			XrmCombineDatabase(XrmGetStringDatabase(screen_resources), &database, False);
218 			XFree(screen_resources);
219 		}
220 
221 		display_resources = XResourceManagerString(_x.display);
222 		if(display_resources == nil){
223 			home = getenv("HOME");
224 			if(home!=nil && (file=smprint("%s/.Xdefaults", home)) != nil){
225 				XrmCombineFileDatabase(file, &database, False);
226 				free(file);
227 			}
228 			free(home);
229 		}else
230 			XrmCombineDatabase(XrmGetStringDatabase(display_resources), &database, False);
231 
232 		geom = smprint("%s.geometry", label);
233 		if(geom && XrmGetResource(database, geom, nil, &geomrestype, &geomres))
234 			mask = XParseGeometry(geomres.addr, &x, &y, (uint*)&width, (uint*)&height);
235 		free(geom);
236 
237 		if((mask & WidthValue) && (mask & HeightValue)){
238 			r = Rect(0, 0, width, height);
239 		}else{
240 			r = Rect(0, 0, WidthOfScreen(xscreen)*3/4,
241 					HeightOfScreen(xscreen)*3/4);
242 			if(Dx(r) > Dy(r)*3/2)
243 				r.max.x = r.min.x + Dy(r)*3/2;
244 			if(Dy(r) > Dx(r)*3/2)
245 				r.max.y = r.min.y + Dx(r)*3/2;
246 		}
247 		if(mask & XNegative){
248 			x += WidthOfScreen(xscreen);
249 		}
250 		if(mask & YNegative){
251 			y += HeightOfScreen(xscreen);
252 		}
253 		havemin = 0;
254 	}
255 
256 	memset(&attr, 0, sizeof attr);
257 	attr.colormap = _x.cmap;
258 	attr.background_pixel = ~0;
259 	attr.border_pixel = 0;
260 	_x.drawable = XCreateWindow(
261 		_x.display,	/* display */
262 		xrootwin,	/* parent */
263 		x,		/* x */
264 		y,		/* y */
265 		Dx(r),		/* width */
266 	 	Dy(r),		/* height */
267 		0,		/* border width */
268 		_x.depth,	/* depth */
269 		InputOutput,	/* class */
270 		_x.vis,		/* visual */
271 				/* valuemask */
272 		CWBackPixel|CWBorderPixel|CWColormap,
273 		&attr		/* attributes (the above aren't?!) */
274 	);
275 
276 	/*
277 	 * Label and other properties required by ICCCCM.
278 	 */
279 	memset(&name, 0, sizeof name);
280 	if(label == nil)
281 		label = "pjw-face-here";
282 	name.value = (uchar*)label;
283 	name.encoding = XA_STRING;
284 	name.format = 8;
285 	name.nitems = strlen((char*)name.value);
286 
287 	memset(&normalhint, 0, sizeof normalhint);
288 	normalhint.flags = PSize|PMaxSize;
289 	if(winsize && winsize[0]){
290 		normalhint.flags &= ~PSize;
291 		normalhint.flags |= USSize;
292 		normalhint.width = Dx(r);
293 		normalhint.height = Dy(r);
294 	}else{
295 		if((mask & WidthValue) && (mask & HeightValue)){
296 			normalhint.flags &= ~PSize;
297 			normalhint.flags |= USSize;
298 			normalhint.width = width;
299 			normalhint.height = height;
300 		}
301 		if((mask & WidthValue) && (mask & HeightValue)){
302 			normalhint.flags |= USPosition;
303 			normalhint.x = x;
304 			normalhint.y = y;
305 		}
306 	}
307 
308 	normalhint.max_width = WidthOfScreen(xscreen);
309 	normalhint.max_height = HeightOfScreen(xscreen);
310 
311 	memset(&hint, 0, sizeof hint);
312 	hint.flags = InputHint|StateHint;
313 	hint.input = 1;
314 	hint.initial_state = NormalState;
315 
316 	memset(&classhint, 0, sizeof classhint);
317 	classhint.res_name = label;
318 	classhint.res_class = label;
319 
320 	argv[0] = label;
321 	argv[1] = nil;
322 
323 	XSetWMProperties(
324 		_x.display,	/* display */
325 		_x.drawable,	/* window */
326 		&name,		/* XA_WM_NAME property */
327 		&name,		/* XA_WM_ICON_NAME property */
328 		argv,		/* XA_WM_COMMAND */
329 		1,		/* argc */
330 		&normalhint,	/* XA_WM_NORMAL_HINTS */
331 		&hint,		/* XA_WM_HINTS */
332 		&classhint	/* XA_WM_CLASSHINTS */
333 	);
334 	XFlush(_x.display);
335 
336 	if(havemin){
337 		XWindowChanges ch;
338 
339 		memset(&ch, 0, sizeof ch);
340 		ch.x = r.min.x;
341 		ch.y = r.min.y;
342 		XConfigureWindow(_x.display, _x.drawable, CWX|CWY, &ch);
343 		/*
344 		 * Must pretend origin is 0,0 for X.
345 		 */
346 		r = Rect(0,0,Dx(r),Dy(r));
347 	}
348 	/*
349 	 * Look up clipboard atom.
350 	 */
351 	_x.clipboard = XInternAtom(_x.display, "CLIPBOARD", False);
352 	_x.utf8string = XInternAtom(_x.display, "UTF8_STRING", False);
353 	_x.targets = XInternAtom(_x.display, "TARGETS", False);
354 	_x.text = XInternAtom(_x.display, "TEXT", False);
355 	_x.compoundtext = XInternAtom(_x.display, "COMPOUND_TEXT", False);
356 	_x.takefocus = XInternAtom(_x.display, "WM_TAKE_FOCUS", False);
357 	_x.losefocus = XInternAtom(_x.display, "_9WM_LOSE_FOCUS", False);
358 	_x.wmprotos = XInternAtom(_x.display, "WM_PROTOCOLS", False);
359 
360 	atoms[0] = _x.takefocus;
361 	atoms[1] = _x.losefocus;
362 	XChangeProperty(_x.display, _x.drawable, _x.wmprotos, XA_ATOM, 32,
363 		PropModeReplace, (uchar*)atoms, 2);
364 
365 	/*
366 	 * Put the window on the screen, check to see what size we actually got.
367 	 */
368 	XMapWindow(_x.display, _x.drawable);
369 	XSync(_x.display, False);
370 
371 	if(!XGetWindowAttributes(_x.display, _x.drawable, &wattr))
372 		fprint(2, "XGetWindowAttributes failed\n");
373 	else if(wattr.width && wattr.height){
374 		if(wattr.width != Dx(r) || wattr.height != Dy(r)){
375 			r.max.x = wattr.width;
376 			r.max.y = wattr.height;
377 		}
378 	}else
379 		fprint(2, "XGetWindowAttributes: bad attrs\n");
380 
381 	/*
382 	 * Allocate our local backing store.
383 	 */
384 	_x.screenr = r;
385 	_x.screenpm = XCreatePixmap(_x.display, _x.drawable, Dx(r), Dy(r), _x.depth);
386 	_x.nextscreenpm = _x.screenpm;
387 	_x.screenimage = _xallocmemimage(r, _x.chan, _x.screenpm);
388 
389 	/*
390 	 * Allocate some useful graphics contexts for the future.
391 	 */
392 	_x.gcfill	= xgc(_x.screenpm, FillSolid, -1);
393 	_x.gccopy	= xgc(_x.screenpm, -1, -1);
394 	_x.gcsimplesrc 	= xgc(_x.screenpm, FillStippled, -1);
395 	_x.gczero	= xgc(_x.screenpm, -1, -1);
396 	_x.gcreplsrc	= xgc(_x.screenpm, FillTiled, -1);
397 
398 	pmid = XCreatePixmap(_x.display, _x.drawable, 1, 1, 1);
399 	_x.gcfill0	= xgc(pmid, FillSolid, 0);
400 	_x.gccopy0	= xgc(pmid, -1, -1);
401 	_x.gcsimplesrc0	= xgc(pmid, FillStippled, -1);
402 	_x.gczero0	= xgc(pmid, -1, -1);
403 	_x.gcreplsrc0	= xgc(pmid, FillTiled, -1);
404 	XFreePixmap(_x.display, pmid);
405 
406 	return _x.screenimage;
407 
408 err0:
409 	/*
410 	 * Should do a better job of cleaning up here.
411 	 */
412 	XCloseDisplay(_x.display);
413 	return nil;
414 }
415 
416 int
417 _xsetlabel(char *label)
418 {
419 	XTextProperty name;
420 
421 	/*
422 	 * Label and other properties required by ICCCCM.
423 	 */
424 	memset(&name, 0, sizeof name);
425 	if(label == nil)
426 		label = "pjw-face-here";
427 	name.value = (uchar*)label;
428 	name.encoding = XA_STRING;
429 	name.format = 8;
430 	name.nitems = strlen((char*)name.value);
431 
432 	XSetWMProperties(
433 		_x.display,	/* display */
434 		_x.drawable,	/* window */
435 		&name,		/* XA_WM_NAME property */
436 		&name,		/* XA_WM_ICON_NAME property */
437 		nil,		/* XA_WM_COMMAND */
438 		0,		/* argc */
439 		nil,		/* XA_WM_NORMAL_HINTS */
440 		nil,		/* XA_WM_HINTS */
441 		nil	/* XA_WM_CLASSHINTS */
442 	);
443 	XFlush(_x.display);
444 	return 0;
445 }
446 
447 /*
448  * Create a GC with a particular fill style and XXX.
449  * Disable generation of GraphicsExpose/NoExpose events in the GC.
450  */
451 static XGC
452 xgc(XDrawable d, int fillstyle, int foreground)
453 {
454 	XGC gc;
455 	XGCValues v;
456 
457 	memset(&v, 0, sizeof v);
458 	v.function = GXcopy;
459 	v.graphics_exposures = False;
460 	gc = XCreateGC(_x.display, d, GCFunction|GCGraphicsExposures, &v);
461 	if(fillstyle != -1)
462 		XSetFillStyle(_x.display, gc, fillstyle);
463 	if(foreground != -1)
464 		XSetForeground(_x.display, gc, 0);
465 	return gc;
466 }
467 
468 
469 /*
470  * Initialize map with the Plan 9 rgbv color map.
471  */
472 static void
473 plan9cmap(void)
474 {
475 	int r, g, b, cr, cg, cb, v, num, den, idx, v7, idx7;
476 	static int once;
477 
478 	if(once)
479 		return;
480 	once = 1;
481 
482 	for(r=0; r!=4; r++)
483 	for(g = 0; g != 4; g++)
484 	for(b = 0; b!=4; b++)
485 	for(v = 0; v!=4; v++){
486 		den=r;
487 		if(g > den)
488 			den=g;
489 		if(b > den)
490 			den=b;
491 		/* divide check -- pick grey shades */
492 		if(den==0)
493 			cr=cg=cb=v*17;
494 		else {
495 			num=17*(4*den+v);
496 			cr=r*num/den;
497 			cg=g*num/den;
498 			cb=b*num/den;
499 		}
500 		idx = r*64 + v*16 + ((g*4 + b + v - r) & 15);
501 		_x.map[idx].red = cr*0x0101;
502 		_x.map[idx].green = cg*0x0101;
503 		_x.map[idx].blue = cb*0x0101;
504 		_x.map[idx].pixel = idx;
505 		_x.map[idx].flags = DoRed|DoGreen|DoBlue;
506 
507 		v7 = v >> 1;
508 		idx7 = r*32 + v7*16 + g*4 + b;
509 		if((v & 1) == v7){
510 			_x.map7to8[idx7][0] = idx;
511 			if(den == 0) { 		/* divide check -- pick grey shades */
512 				cr = ((255.0/7.0)*v7)+0.5;
513 				cg = cr;
514 				cb = cr;
515 			}
516 			else {
517 				num=17*15*(4*den+v7*2)/14;
518 				cr=r*num/den;
519 				cg=g*num/den;
520 				cb=b*num/den;
521 			}
522 			_x.map7[idx7].red = cr*0x0101;
523 			_x.map7[idx7].green = cg*0x0101;
524 			_x.map7[idx7].blue = cb*0x0101;
525 			_x.map7[idx7].pixel = idx7;
526 			_x.map7[idx7].flags = DoRed|DoGreen|DoBlue;
527 		}
528 		else
529 			_x.map7to8[idx7][1] = idx;
530 	}
531 }
532 
533 /*
534  * Initialize and install the rgbv color map as a private color map
535  * for this application.  It gets the best colors when it has the
536  * cursor focus.
537  *
538  * We always choose the best depth possible, but that might not
539  * be the default depth.  On such "suboptimal" systems, we have to allocate an
540  * empty color map anyway, according to Axel Belinfante.
541  */
542 static int 
543 setupcmap(XWindow w)
544 {
545 	char buf[30];
546 	int i;
547 	u32int p, pp;
548 	XColor c;
549 
550 	if(_x.depth <= 1)
551 		return 0;
552 
553 	if(_x.depth >= 24) {
554 		if(_x.usetable == 0)
555 			_x.cmap = XCreateColormap(_x.display, w, _x.vis, AllocNone); 
556 
557 		/*
558 		 * The pixel value returned from XGetPixel needs to
559 		 * be converted to RGB so we can call rgb2cmap()
560 		 * to translate between 24 bit X and our color. Unfortunately,
561 		 * the return value appears to be display server endian 
562 		 * dependant. Therefore, we run some heuristics to later
563 		 * determine how to mask the int value correctly.
564 		 * Yeah, I know we can look at _x.vis->byte_order but 
565 		 * some displays say MSB even though they run on LSB.
566 		 * Besides, this is more anal.
567 		 */
568 		c = _x.map[19];	/* known to have different R, G, B values */
569 		if(!XAllocColor(_x.display, _x.cmap, &c)){
570 			werrstr("XAllocColor: %r");
571 			return -1;
572 		}
573 		p  = c.pixel;
574 		pp = rgb2cmap((p>>16)&0xff,(p>>8)&0xff,p&0xff);
575 		if(pp != _x.map[19].pixel) {
576 			/* check if endian is other way */
577 			pp = rgb2cmap(p&0xff,(p>>8)&0xff,(p>>16)&0xff);
578 			if(pp != _x.map[19].pixel){
579 				werrstr("cannot detect X server byte order");
580 				return -1;
581 			}
582 
583 			switch(_x.chan){
584 			case RGB24:
585 				_x.chan = BGR24;
586 				break;
587 			case XRGB32:
588 				_x.chan = XBGR32;
589 				break;
590 			default:
591 				werrstr("cannot byteswap channel %s",
592 					chantostr(buf, _x.chan));
593 				break;
594 			}
595 		}
596 	}else if(_x.vis->class == TrueColor || _x.vis->class == DirectColor){
597 		/*
598 		 * Do nothing.  We have no way to express a
599 		 * mixed-endian 16-bit screen, so pretend they don't exist.
600 		 */
601 		if(_x.usetable == 0)
602 			_x.cmap = XCreateColormap(_x.display, w, _x.vis, AllocNone);
603 	}else if(_x.vis->class == PseudoColor){
604 		if(_x.usetable == 0){
605 			_x.cmap = XCreateColormap(_x.display, w, _x.vis, AllocAll); 
606 			XStoreColors(_x.display, _x.cmap, _x.map, 256);
607 			for(i = 0; i < 256; i++){
608 				_x.tox11[i] = i;
609 				_x.toplan9[i] = i;
610 			}
611 		}else{
612 			for(i = 0; i < 128; i++){
613 				c = _x.map7[i];
614 				if(!XAllocColor(_x.display, _x.cmap, &c)){
615 					werrstr("can't allocate colors in 7-bit map");
616 					return -1;
617 				}
618 				_x.tox11[_x.map7to8[i][0]] = c.pixel;
619 				_x.tox11[_x.map7to8[i][1]] = c.pixel;
620 				_x.toplan9[c.pixel] = _x.map7to8[i][0];
621 			}
622 		}
623 	}else{
624 		werrstr("unsupported visual class %d", _x.vis->class);
625 		return -1;
626 	}
627 	return 0;
628 }
629 
630 void
631 _flushmemscreen(Rectangle r)
632 {
633 	if(_x.nextscreenpm != _x.screenpm){
634 		qlock(&_x.screenlock);
635 		XSync(_x.display, False);
636 		XFreePixmap(_x.display, _x.screenpm);
637 		_x.screenpm = _x.nextscreenpm;
638 		qunlock(&_x.screenlock);
639 	}
640 
641 	if(r.min.x >= r.max.x || r.min.y >= r.max.y)
642 		return;
643 	XCopyArea(_x.display, _x.screenpm, _x.drawable, _x.gccopy, r.min.x, r.min.y,
644 		Dx(r), Dy(r), r.min.x, r.min.y);
645 	XFlush(_x.display);
646 }
647 
648 void
649 _xexpose(XEvent *e)
650 {
651 	XExposeEvent *xe;
652 	Rectangle r;
653 
654 	qlock(&_x.screenlock);
655 	if(_x.screenpm != _x.nextscreenpm){
656 		qunlock(&_x.screenlock);
657 		return;
658 	}
659 	xe = (XExposeEvent*)e;
660 	r.min.x = xe->x;
661 	r.min.y = xe->y;
662 	r.max.x = xe->x+xe->width;
663 	r.max.y = xe->y+xe->height;
664 	XCopyArea(_x.display, _x.screenpm, _x.drawable, _x.gccopy, r.min.x, r.min.y,
665 		Dx(r), Dy(r), r.min.x, r.min.y);
666 	XSync(_x.display, False);
667 	qunlock(&_x.screenlock);
668 }
669 
670 int
671 _xdestroy(XEvent *e)
672 {
673 	XDestroyWindowEvent *xe;
674 
675 	xe = (XDestroyWindowEvent*)e;
676 	if(xe->window == _x.drawable){
677 		_x.destroyed = 1;
678 		return 1;
679 	}
680 	return 0;
681 }
682 
683 int
684 _xconfigure(XEvent *e)
685 {
686 	Rectangle r;
687 	XConfigureEvent *xe = (XConfigureEvent*)e;
688 
689 	if(xe->width == Dx(_x.screenr) && xe->height == Dy(_x.screenr))
690 		return 0;
691 	r = Rect(0, 0, xe->width, xe->height);
692 	qlock(&_x.screenlock);
693 	if(_x.screenpm != _x.nextscreenpm){
694 		XCopyArea(_x.display, _x.screenpm, _x.drawable, _x.gccopy, r.min.x, r.min.y,
695 			Dx(r), Dy(r), r.min.x, r.min.y);
696 		XSync(_x.display, False);
697 	}
698 	qunlock(&_x.screenlock);
699 	_x.newscreenr = r;
700 	return 1;
701 }
702 
703 int
704 _xreplacescreenimage(void)
705 {
706 	Memimage *m;
707 	XDrawable pixmap;
708 	Rectangle r;
709 
710 	r = _x.newscreenr;
711 	if(eqrect(_x.screenr, r))
712 		return 0;
713 
714 	pixmap = XCreatePixmap(_x.display, _x.drawable, Dx(r), Dy(r), _x.depth);
715 	m = _xallocmemimage(r, _x.chan, pixmap);
716 	if(_x.nextscreenpm != _x.screenpm)
717 		XFreePixmap(_x.display, _x.nextscreenpm);
718 	_x.nextscreenpm = pixmap;
719 	_x.screenr = r;
720 	_drawreplacescreenimage(m);
721 	return 1;
722 }
723 
724 static int
725 parsewinsize(char *s, Rectangle *r, int *havemin)
726 {
727 	char c, *os;
728 	int i, j, k, l;
729 
730 	os = s;
731 	*havemin = 0;
732 	*r = Rect(0,0,0,0);
733 	if(!isdigit((uchar)*s))
734 		goto oops;
735 	i = strtol(s, &s, 0);
736 	if(*s == 'x'){
737 		s++;
738 		if(!isdigit((uchar)*s))
739 			goto oops;
740 		j = strtol(s, &s, 0);
741 		r->max.x = i;
742 		r->max.y = j;
743 		if(*s == 0)
744 			return 0;
745 		if(*s != '@')
746 			goto oops;
747 
748 		s++;
749 		if(!isdigit((uchar)*s))
750 			goto oops;
751 		i = strtol(s, &s, 0);
752 		if(*s != ',' && *s != ' ')
753 			goto oops;
754 		s++;
755 		if(!isdigit((uchar)*s))
756 			goto oops;
757 		j = strtol(s, &s, 0);
758 		if(*s != 0)
759 			goto oops;
760 		*r = rectaddpt(*r, Pt(i,j));
761 		*havemin = 1;
762 		return 0;
763 	}
764 
765 	c = *s;
766 	if(c != ' ' && c != ',')
767 		goto oops;
768 	s++;
769 	if(!isdigit((uchar)*s))
770 		goto oops;
771 	j = strtol(s, &s, 0);
772 	if(*s != c)
773 		goto oops;
774 	s++;
775 	if(!isdigit((uchar)*s))
776 		goto oops;
777 	k = strtol(s, &s, 0);
778 	if(*s != c)
779 		goto oops;
780 	s++;
781 	if(!isdigit((uchar)*s))
782 		goto oops;
783 	l = strtol(s, &s, 0);
784 	if(*s != 0)
785 		goto oops;
786 	*r = Rect(i,j,k,l);
787 	*havemin = 1;
788 	return 0;
789 
790 oops:
791 	werrstr("bad syntax in window size '%s'", os);
792 	return -1;
793 }