aboutsummaryrefslogtreecommitdiff
path: root/externals/gridflow/format/x11.c
blob: 9237a6b6a4b1493a6e122c20cdcfb9a962b24977 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
/*
	$Id: x11.c,v 1.2 2006-03-15 04:37:46 matju Exp $

	GridFlow
	Copyright (c) 2001,2002,2003,2004,2005 by Mathieu Bouchard

	This program is free software; you can redistribute it and/or
	modify it under the terms of the GNU General Public License
	as published by the Free Software Foundation; either version 2
	of the License, or (at your option) any later version.

	See file ../COPYING for further informations on licensing terms.

	This program is distributed in the hope that it will be useful,
	but WITHOUT ANY WARRANTY; without even the implied warranty of
	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
	GNU General Public License for more details.

	You should have received a copy of the GNU General Public License
	along with this program; if not, write to the Free Software
	Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA.

	Note: some of the code was adapted from PDP's (the XVideo stuff).
*/
#include "../base/grid.h.fcs"
#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include <sys/time.h>
#include <X11/Xlib.h>
#include <X11/Xutil.h>
#include <X11/StringDefs.h>
#ifdef HAVE_X11_SHARED_MEMORY
#include <sys/ipc.h>
#include <sys/shm.h>
#include <X11/extensions/XShm.h>
#endif
#ifdef HAVE_X11_XVIDEO
#include <X11/extensions/Xv.h>
#include <X11/extensions/Xvlib.h>
#endif

#undef L
#define L gfpost("%s:%d in %s",__FILE__,__LINE__,__PRETTY_FUNCTION__);

/* X11 Error Handler type */
typedef int (*XEH)(Display *, XErrorEvent *);

\class FormatX11 < Format
struct FormatX11 : Format {
/* at the Display/Screen level */
	Display *display; /* connection to xserver */
	Visual *visual;   /* screen properties */
	Window root_window;
	Colormap colormap; /* for 256-color mode */
	short depth;
	int transfer;	   /* 0=plain 1=xshm 2=xvideo */
	bool use_stripes;  /* use alternate conversion in 256-color mode */
/* at the Window level */
	Window window;       /* X11 window number */
	Window parent;       /* X11 window number of the parent */
	GC imagegc;          /* X11 graphics context (like java.awt.Graphics) */
	XImage *ximage;      /* X11 image descriptor */
	Pt<uint8> image;     /* the real data (that XImage binds to) */
	bool is_owner;
	int32 pos[2];
	P<BitPacking> bit_packing;
	P<Dim> dim;
	bool lock_size;
	bool override_redirect;
#ifdef HAVE_X11_SHARED_MEMORY
	XShmSegmentInfo *shm_info; /* to share memory with X11/Unix */
#endif
#ifdef HAVE_X11_XVIDEO
    int xv_format;
    int xv_port;
    XvImage *xvi;
    unsigned char *data;
    int last_encoding;
#endif
	FormatX11 () : transfer(0), use_stripes(false), 
	window(0), ximage(0), image(Pt<uint8>()), is_owner(true),
	dim(0), lock_size(false), override_redirect(false)
#ifdef HAVE_X11_SHARED_MEMORY
		, shm_info(0)
#endif
	{}
	template <class T> void frame_by_type (T bogus);
	void show_section(int x, int y, int sx, int sy);
	void set_wm_hints ();
	void dealloc_image ();
	bool alloc_image (int sx, int sy);
	void resize_window (int sx, int sy);
	void open_display(const char *disp_string);
	void report_pointer(int y, int x, int state);
	void prepare_colormap();
	Window FormatX11::search_window_tree (Window xid, Atom key, const char *value, int level=0);
	\decl void initialize (...);
	\decl void frame ();
	\decl void close ();
	\decl void call ();
	\decl void _0_out_size (int sy, int sx);
	\decl void _0_setcursor (int shape);
	\decl void _0_hidecursor ();
	\decl void _0_set_geometry (int y, int x, int sy, int sx);
	\decl void _0_fall_thru (int flag);
	\decl void _0_transfer (Symbol s);
	\decl void _0_title (String s=Qnil);
	\grin 0 int
};

/* ---------------------------------------------------------------- */

static const char *xfers[3] = {"plain","xshm","xvideo"};

void FormatX11::show_section(int x, int y, int sx, int sy) {
	int zy=dim->get(0), zx=dim->get(1);
	if (y>zy||x>zx) return;
	if (y+sy>zy) sy=zy-y;
	if (x+sx>zx) sx=zx-x;
	switch (transfer) {
	case 0: XPutImage(display,window,imagegc,ximage,x,y,x,y,sx,sy);
		XFlush(display);
	break;
#ifdef HAVE_X11_SHARED_MEMORY
	case 1:	XSync(display,False);
		XShmPutImage(display,window,imagegc,ximage,x,y,x,y,sx,sy,False);
		XFlush(display);
		//XPutImage( display,window,imagegc,ximage,x,y,x,y,sx,sy);
		// should completion events be waited for? looks like a bug
		break;
#endif
#ifdef HAVE_X11_XVIDEO
	case 2:
	break;
#endif
	default: RAISE("transfer mode '%s' not available", xfers[transfer]);
	}
}

/* window manager hints, defines the window as non-resizable */
void FormatX11::set_wm_hints () {
	Ruby title = rb_ivar_get(rself,SI(@title));
	if (!is_owner) return;
	XWMHints wmh;
	char buf[256],*bufp=buf;
	if (title==Qnil) {
		sprintf(buf,"GridFlow (%d,%d,%d)",dim->get(0),dim->get(1),dim->get(2));
	} else {
		sprintf(buf,"%.255s",rb_str_ptr(title));
	}
	XTextProperty wtitle; XStringListToTextProperty((char **)&bufp, 1, &wtitle);
	XSizeHints sh;
	sh.flags=PSize|PMaxSize|PMinSize;
	sh.min_width  = sh.max_width  = sh.width  = dim->get(1);
	sh.min_height = sh.max_height = sh.height = dim->get(0);
	wmh.input = True;
	wmh.flags = InputHint;
	XSetWMProperties(display,window,&wtitle,&wtitle,0,0,&sh,&wmh,0);
}

void FormatX11::report_pointer(int y, int x, int state) {
	Ruby argv[5] = {
		INT2NUM(0), SYM(position),
		INT2NUM(y), INT2NUM(x), INT2NUM(state) };
	send_out(COUNT(argv),argv);
}

\def void call() {
	XEvent e;
	for (;;) {
		int xpending = XEventsQueued(display, QueuedAfterFlush);
		if (!xpending) break;
		XNextEvent(display,&e);
		switch (e.type) {
		case Expose:{
			XExposeEvent *ex = (XExposeEvent *)&e;
			if (rb_ivar_get(rself,SI(@mode)) == SYM(out)) {
				show_section(ex->x,ex->y,ex->width,ex->height);
			}
		}break;
		case ButtonPress:{
			XButtonEvent *eb = (XButtonEvent *)&e;
			eb->state |= 128<<eb->button;
			report_pointer(eb->y,eb->x,eb->state);
		}break;
		case ButtonRelease:{
			XButtonEvent *eb = (XButtonEvent *)&e;
			eb->state &= ~(128<<eb->button);
			report_pointer(eb->y,eb->x,eb->state);
		}break;
		case KeyPress:
		case KeyRelease:{
			XKeyEvent *ek = (XKeyEvent *)&e;
			//XLookupString(ek, buf, 63, 0, 0);
			char *kss = XKeysymToString(XLookupKeysym(ek, 0));
			char buf[64];
			if (!kss) return; /* unknown keys ignored */
			if (isdigit(*kss)) sprintf(buf,"D%s",kss); else strcpy(buf,kss);
			Ruby argv[6] = {
				INT2NUM(0), e.type==KeyPress ? SYM(keypress) : SYM(keyrelease),
				INT2NUM(ek->y), INT2NUM(ek->x), INT2NUM(ek->state),
				rb_funcall(rb_str_new2(buf),SI(intern),0) };
			send_out(COUNT(argv),argv);
			//XFree(kss);
		}break;
		case MotionNotify:{
			XMotionEvent *em = (XMotionEvent *)&e;
			report_pointer(em->y,em->x,em->state);
		}break;
		case DestroyNotify:{
			gfpost("This window is being closed, so this handler will close too!");
			rb_funcall(rself,SI(close),0);
			return;
		}break;
		case ConfigureNotify:break; // as if we cared
		}
	}
	IEVAL(rself,"@clock.delay 20");
}

\def void frame () {
	XGetSubImage(display, window, 0, 0, dim->get(1), dim->get(0),
		(unsigned)-1, ZPixmap, ximage, 0, 0);
	GridOutlet out(this,0,dim,NumberTypeE_find(rb_ivar_get(rself,SI(@cast))));
	int sy=dim->get(0), sx=dim->get(1), bs=dim->prod(1);
	STACK_ARRAY(uint8,b2,bs);
	for(int y=0; y<sy; y++) {
		Pt<uint8> b1 = Pt<uint8>(image,ximage->bytes_per_line*dim->get(0))
			+ ximage->bytes_per_line * y;
		bit_packing->unpack(sx,b1,b2);
		out.send(bs,b2);
	}
}

/* loathe Xlib's error handlers */
static FormatX11 *current_x11;
static int FormatX11_error_handler (Display *d, XErrorEvent *xee) {
	gfpost("XErrorEvent: type=0x%08x display=0x%08x xid=0x%08x",
		xee->type, xee->display, xee->resourceid);
	gfpost("... serial=0x%08x error=0x%08x request=0x%08lx minor=0x%08x",
		xee->serial, xee->error_code, xee->request_code, xee->minor_code);
	if (current_x11->transfer==1) {
		gfpost("(note: turning shm off)");
		current_x11->transfer = 0;
	}
	return 42; /* it seems that the return value is ignored. */
}

bool FormatX11::alloc_image (int sx, int sy) {
	dim = new Dim(sy,sx,3);
	dealloc_image();
	if (sx==0 || sy==0) return false;
	current_x11 = this;
	switch (transfer) {
	case 0: {
		ximage = XCreateImage(display,visual,depth,ZPixmap,0,0,sx,sy,8,0);
		int size = ximage->bytes_per_line*ximage->height;
		if (!ximage) RAISE("can't create image"); 
		image = ARRAY_NEW(uint8,size);
		ximage->data = (int8 *)image;
	} break;
#ifdef HAVE_X11_SHARED_MEMORY
	case 1: {
		shm_info = new XShmSegmentInfo;
		ximage = XShmCreateImage(display,visual,depth,ZPixmap,0,shm_info,sx,sy);
                if (!ximage) {gfpost("shm got disabled, retrying..."); transfer=0;}
		XSync(display,0);
		if (transfer==0) return alloc_image(sx,sy);
		int size = ximage->bytes_per_line*ximage->height;
		gfpost("size = %d",size);
		shm_info->shmid = shmget(IPC_PRIVATE,size,IPC_CREAT|0777);
		if(shm_info->shmid < 0) RAISE("shmget() failed: %s",strerror(errno));
		ximage->data = shm_info->shmaddr = (char *)shmat(shm_info->shmid,0,0);
		if ((long)(shm_info->shmaddr) == -1) RAISE("shmat() failed: %s",strerror(errno));
		gfpost("shmaddr=%p",shm_info->shmaddr);
		image = Pt<uint8>((uint8 *)ximage->data,size);
		shm_info->readOnly = False;
		if (!XShmAttach(display, shm_info)) RAISE("ERROR: XShmAttach: big problem");
		XSync(display,0); // make sure the server picks it up
		// yes, this can be done now. should cause auto-cleanup.
		shmctl(shm_info->shmid,IPC_RMID,0);
		if (transfer==0) return alloc_image(sx,sy);
	} break;
#endif
#ifdef HAVE_X11_XVIDEO
	case 2: {
	unsigned int ver, rel, req, ev, err, i, j, adaptors, formats;
	XvAdaptorInfo *ai;
	if (Success != XvQueryExtension(display,&ver,&rel,&req,&ev,&err)) RAISE("XvQueryExtension problem");
	/* find + lock port */
	if (Success != XvQueryAdaptors(display,DefaultRootWindow(display),&adaptors,&ai)) RAISE("XvQueryAdaptors problem");
	for (i = 0; i < adaptors; i++) {
		if (ai[i].type&XvInputMask && ai[i].type&XvImageMask) {
			for (j=0; j<ai[i].num_ports; j++) {
				if (Success != XvGrabPort(display,ai[i].base_id+j,CurrentTime)) RAISE("XvGrabPort problem");
				xv_port = ai[i].base_id + j;
				goto breakout;
			}
		}
	}
	breakout:
	XFree(ai);
	if (!xv_port) RAISE("no xv_port");
/*	unsigned int encn;
	XvEncodingInfo *enc;
	XvQueryEncodings(display,xv_port,&encn,&enc);
	for (i=0; i<encn; i++) gfpost("XvEncodingInfo: name='%s' encoding_id=0x%08x",enc[i].name,enc[i].encoding_id);*/
	gfpost("pdp_xvideo: grabbed port %d on adaptor %d",xv_port,i);
	size_t size = sx*sy*4;
	data = new uint8[size];
	for (i=0; i<size; i++) data[i]=0;
	xvi = XvCreateImage(display,xv_port,0x51525762,(char *)data,sx,sy);
	last_encoding=-1;
	if (!xvi) RAISE("XvCreateImage problem");
	} break;
#endif
	default: RAISE("transfer mode '%s' not available", xfers[transfer]);
	}
	int status = XInitImage(ximage);
	if (status!=1) gfpost("XInitImage returned: %d", status);
	return true;
retry:
	gfpost("shm got disabled, retrying...");
	return alloc_image(sx,sy);
}

void FormatX11::dealloc_image () {
	if (!ximage) return;
	switch (transfer) {
	case 0: XFree(ximage); ximage=0; image=Pt<uint8>(); break;
#ifdef HAVE_X11_SHARED_MEMORY
	case 1:
		shmdt(ximage->data);
		XShmDetach(display,shm_info);
		if (shm_info) {delete shm_info; shm_info=0;}
		XFree(ximage);
		ximage = 0;
		image = Pt<uint8>();
	break;
#endif
#ifdef HAVE_X11_XVIDEO
	case 2: {
		if (data) delete[] data;
		if (xvi) XFree(xvi);
		xvi=0;
		data=0;
	}
	break;
#endif
	default: RAISE("transfer mode '%s' not available",xfers[transfer]);
	}
}

void FormatX11::resize_window (int sx, int sy) {
	if (sy<16) sy=16; if (sy>4096) RAISE("height too big");
	if (sx<16) sx=16; if (sx>4096) RAISE("width too big");
	alloc_image(sx,sy);
	if (window) {
		if (is_owner && !lock_size) {
			set_wm_hints();
			XResizeWindow(display,window,sx,sy);
		}
	} else {
		XSetWindowAttributes xswa;
		xswa.do_not_propagate_mask = 0; //?
		xswa.override_redirect = override_redirect; //#!@#$
		window = XCreateWindow(display,
			parent, pos[1], pos[0], sx, sy, 0,
			CopyFromParent, InputOutput, CopyFromParent,
			CWOverrideRedirect|CWDontPropagate, &xswa);
		if(!window) RAISE("can't create window");
		set_wm_hints();
		_0_fall_thru(0,0,is_owner);
		if (is_owner) XMapRaised(display, window);
		imagegc = XCreateGC(display, window, 0, NULL);
		if (visual->c_class == PseudoColor) prepare_colormap(); 
	}
	XSync(display,0);
}

GRID_INLET(FormatX11,0) {
	if (in->dim->n != 3)
		RAISE("expecting 3 dimensions: rows,columns,channels");
	if (in->dim->get(2)!=3 && in->dim->get(2)!=4)
		RAISE("expecting 3 or 4 channels: red,green,blue,ignored (got %d)",in->dim->get(2));
	int sxc = in->dim->prod(1);
	int sx = in->dim->get(1), osx = dim->get(1);
	int sy = in->dim->get(0), osy = dim->get(0);
	in->set_factor(sxc);
	if (sx!=osx || sy!=osy) resize_window(sx,sy);
	if (in->dim->get(2)!=bit_packing->size) {
		bit_packing->mask[3]=0;
		bit_packing = new BitPacking(bit_packing->endian,
		  bit_packing->bytes, in->dim->get(2), bit_packing->mask);
	}
} GRID_FLOW {
	int bypl = ximage->bytes_per_line;
	int sxc = in->dim->prod(1);
	int sx = in->dim->get(1);
	int y = in->dex/sxc;
	int oy = y;
	for (; n>0; y++, data+=sxc, n-=sxc) {
		// convert line
		if (use_stripes) {
			int o=y*bypl;
			for (int x=0, i=0, k=y%3; x<sx; x++, i+=3, k=(k+1)%3) {
				image[o+x] = (k<<6) | data[i+k]>>2;
			}
		} else {
			bit_packing->pack(sx, data, image+y*bypl);
		}
	}
} GRID_FINISH {
	show_section(0,0,in->dim->get(1),in->dim->get(0));
} GRID_END

\def void close () {
	if (!this) RAISE("stupid error: trying to close display NULL. =)");
	bit_packing=0;
	IEVAL(rself,"@clock.unset");
	if (is_owner) XDestroyWindow(display,window);
	XSync(display,0);
	dealloc_image();
	XCloseDisplay(display);
	display=0;
	rb_call_super(argc,argv);
}

\def void _0_out_size (int sy, int sx) { resize_window(sx,sy); }

\def void _0_setcursor (int shape) {
	shape = 2*(shape&63);
	Cursor c = XCreateFontCursor(display,shape);
	XDefineCursor(display,window,c);
	XFlush(display);
}

\def void _0_hidecursor () {
	Font font = XLoadFont(display,"fixed");
	XColor color; /* bogus */
	Cursor c = XCreateGlyphCursor(display,font,font,' ',' ',&color,&color);
	XDefineCursor(display,window,c);
	XFlush(display);
}

void FormatX11::prepare_colormap() {
	Colormap colormap = XCreateColormap(display,window,visual,AllocAll);
	XColor colors[256];
	if (use_stripes) {
		for (int i=0; i<192; i++) {
			int k=(i&63)*0xffff/63;
			colors[i].pixel = i;
			colors[i].red   = (i>>6)==0 ? k : 0;
			colors[i].green = (i>>6)==1 ? k : 0;
			colors[i].blue  = (i>>6)==2 ? k : 0;
			colors[i].flags = DoRed | DoGreen | DoBlue;
		}
		XStoreColors(display,colormap,colors,192);
	} else {	
		for (int i=0; i<256; i++) {
			colors[i].pixel = i;
			colors[i].red   = ((i>>0)&7)*0xffff/7;
			colors[i].green = ((i>>3)&7)*0xffff/7;
			colors[i].blue  = ((i>>6)&3)*0xffff/3;
			colors[i].flags = DoRed | DoGreen | DoBlue;
		}
		XStoreColors(display,colormap,colors,256);
	}
	XSetWindowColormap(display,window,colormap);
}

void FormatX11::open_display(const char *disp_string) {
	display = XOpenDisplay(disp_string);
	if(!display) RAISE("ERROR: opening X11 display: %s",strerror(errno));
	// btw don't expect too much from Xlib error handling.
	// Xlib, you are so free of the ravages of intelligence...
	XSetErrorHandler(FormatX11_error_handler);
	Screen *screen = DefaultScreenOfDisplay(display);
	int screen_num = DefaultScreen(display);
	visual   = DefaultVisual(display, screen_num);
	root_window = DefaultRootWindow(display);
	depth    = DefaultDepthOfScreen(screen);
	colormap = 0;

	switch(visual->c_class) {
	// without colormap
	case TrueColor: case DirectColor: break;
	// with colormap
	case PseudoColor: if (depth!=8) RAISE("ERROR: with colormap, only supported depth is 8 (got %d)", depth); break;
	default: RAISE("ERROR: visual type not supported (got %d)", visual->c_class);
	}

#if defined(HAVE_X11_XVIDEO)
	transfer = 2;
#elif defined(HAVE_X11_SHARED_MEMORY)
	transfer = !! XShmQueryExtension(display);
#else
	transfer = 0;
#endif
}

Window FormatX11::search_window_tree (Window xid, Atom key, const char *value, int level) {
	if (level>2) return 0xDeadBeef;
	Window root_r, parent_r;
	Window *children_r;
	unsigned int nchildren_r;
	XQueryTree(display,xid,&root_r,&parent_r,&children_r,&nchildren_r);
	Window target = 0xDeadBeef;
	for (int i=0; i<(int)nchildren_r; i++) {
		Atom actual_type_r;
		int actual_format_r;
		unsigned long nitems_r, bytes_after_r;
		unsigned char *prop_r;
		XGetWindowProperty(display,children_r[i],key,0,666,0,AnyPropertyType,
		&actual_type_r,&actual_format_r,&nitems_r,&bytes_after_r,&prop_r);
		uint32 value_l = strlen(value);
		bool match = prop_r && nitems_r>=value_l &&
			strncmp((char *)prop_r+nitems_r-value_l,value,value_l)==0;
		XFree(prop_r);
		if (match) {target=children_r[i]; break;}
		target = search_window_tree(children_r[i],key,value,level+1);
		if (target != 0xDeadBeef) break;
	}
	if (children_r) XFree(children_r);
	return target;
}

\def void _0_set_geometry (int y, int x, int sy, int sx) {
	pos[0]=y; pos[1]=x;
	XMoveWindow(display,window,x,y);
	resize_window(sx,sy);
	XFlush(display);
}

\def void _0_fall_thru (int flag) {
	int mask = ExposureMask | StructureNotifyMask;
	if (flag) mask |= ExposureMask|StructureNotifyMask|PointerMotionMask|
		ButtonPressMask|ButtonReleaseMask|ButtonMotionMask|
		KeyPressMask|KeyReleaseMask;
	XSelectInput(display, window, mask);
	XFlush(display);
}

\def void _0_transfer (Symbol s) {
	if (s==SYM(plain))       transfer=0;
	else if (s==SYM(xshm))   transfer=1;
	else if (s==SYM(xvideo)) transfer=2;
	else RAISE("unknown transfer mode (possible: plain xshm xvideo)");
}

\def void _0_title (String s=Qnil) {
	rb_ivar_set(rself,SI(@title),s);
	set_wm_hints();
}

\def void initialize (...) {
	int sy=240, sx=320; // defaults
	rb_call_super(argc,argv);
	rb_ivar_set(rself,SI(@title),Qnil);
	argv++, argc--;
	VALUE domain = argc<1 ? SYM(here) : argv[0];
	int i;
	char host[256];
	if (domain==SYM(here)) {
		open_display(0);
		i=1;
	} else if (domain==SYM(local)) {
		if (argc<2) RAISE("open x11 local: not enough args");
		sprintf(host,":%ld",NUM2LONG(argv[1]));
		open_display(host);
		i=2;
	} else if (domain==SYM(remote)) {
		if (argc<3) RAISE("open x11 remote: not enough args");
		sprintf(host,"%s:%ld",rb_sym_name(argv[1]),NUM2LONG(argv[2]));
		open_display(host);
		i=3;
	} else if (domain==SYM(display)) {
		if (argc<2) RAISE("open x11 display: not enough args");
		strcpy(host,rb_sym_name(argv[1]));
		for (int k=0; host[k]; k++) if (host[k]=='%') host[k]==':';
		gfpost("mode `display', DISPLAY=`%s'",host);
		open_display(host);
		i=2;
	} else {
		RAISE("x11 destination syntax error");
	}

	for(;i<argc;i++) {
		Ruby a=argv[i];
		if (a==SYM(override_redirect)) override_redirect = true;
		else if (a==SYM(use_stripes))  use_stripes = true;
		else RAISE("argument '%s' not recognized",rb_sym_name(argv[i]));
	}

	pos[1]=pos[0]=0;
	parent = root_window;
	if (i>=argc) {
	} else {
		VALUE winspec = argv[i];
		if (winspec==SYM(root)) {
			window = root_window;
			is_owner = false;
		} else if (winspec==SYM(embed)) {
			Ruby title_s = rb_funcall(argv[i+1],SI(to_s),0);
			char *title = strdup(rb_str_ptr(title_s));
			sy = sx = pos[0] = pos[1] = 0;
			parent = search_window_tree(root_window,XInternAtom(display,"WM_NAME",0),title);
			free(title);
			if (parent == 0xDeadBeef) RAISE("Window not found.");
		} else if (winspec==SYM(embed_by_id)) {
			const char *winspec2 = rb_sym_name(argv[i+1]);
			if (strncmp(winspec2,"0x",2)==0) {
				parent = strtol(winspec2+2,0,16);
			} else {
				parent = atoi(winspec2);
			}
		} else {
			if (TYPE(winspec)==T_SYMBOL) {
				const char *winspec2 = rb_sym_name(winspec);
				if (strncmp(winspec2,"0x",2)==0) {
					window = strtol(winspec2+2,0,16);
				} else {
					window = atoi(winspec2); // huh?
				}
			} else {
				window = INT(winspec);
			}
			is_owner = false;
			sy = sx = pos[0] = pos[1] = 0;
		}
	}

	// "resize" also takes care of creation
	resize_window(sx,sy);

	if (is_owner) {
		Atom wmDeleteAtom = XInternAtom(display, "WM_DELETE_WINDOW", False);
		XSetWMProtocols(display,window,&wmDeleteAtom,1);
	}
	
	Visual *v = visual;
	int disp_is_le = !ImageByteOrder(display);
	int bpp = ximage->bits_per_pixel;
	switch(visual->c_class) {
	case TrueColor: case DirectColor: {
		uint32 masks[3] = { v->red_mask, v->green_mask, v->blue_mask };
		bit_packing = new BitPacking(disp_is_le, bpp/8, 3, masks);
	} break;
	case PseudoColor: {
		uint32 masks[3] = { 0x07, 0x38, 0xC0 };
		bit_packing = new BitPacking(disp_is_le, bpp/8, 3, masks);
	} break;
	default: { RAISE("huh?"); }
	}
	IEVAL(rself,"@clock = Clock.new self; @clock.delay 0");
	show_section(0,0,sx,sy);
}

\classinfo {
	IEVAL(rself,"install '#io:x11',1,1;@mode=6;@comment='X Window System Version 11.x'");
}
\end class FormatX11
void startup_x11 () {
	\startall
}