context.c@ 48999

Last change on this file since 48999 was 48999, checked in by vboxsync, 12 years ago
wddm: ensure all windows are initially hidden
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1	/* Copyright (c) 2001, Stanford University
2	* All rights reserved
3	*
4	* See the file LICENSE.txt for information on redistributing this software.
5	*/
6
7	/**
8	* \mainpage OpenGL_stub
9	*
10	* \section OpenGL_stubIntroduction Introduction
11	*
12	* Chromium consists of all the top-level files in the cr
13	* directory. The OpenGL_stub module basically takes care of API dispatch,
14	* and OpenGL state management.
15	*
16	*/
17
18	/**
19	* This file manages OpenGL rendering contexts in the faker library.
20	* The big issue is switching between Chromium and native GL context
21	* management. This is where we support multiple client OpenGL
22	* windows. Typically, one window is handled by Chromium while any
23	* other windows are handled by the native OpenGL library.
24	*/
25
26	#include "chromium.h"
27	#include "cr_error.h"
28	#include "cr_spu.h"
29	#include "cr_mem.h"
30	#include "cr_string.h"
31	#include "cr_environment.h"
32	#include "stub.h"
33
34	/**
35	* This function should be called from MakeCurrent(). It'll detect if
36	* we're in a multi-thread situation, and do the right thing for dispatch.
37	*/
38	#ifdef CHROMIUM_THREADSAFE
39	static void
40	stubCheckMultithread( void )
41	{
42	static unsigned long knownID;
43	static GLboolean firstCall = GL_TRUE;
44
45	if (stub.threadSafe)
46	return; /* nothing new, nothing to do */
47
48	if (firstCall) {
49	knownID = crThreadID();
50	firstCall = GL_FALSE;
51	}
52	else if (knownID != crThreadID()) {
53	/* going thread-safe now! */
54	stub.threadSafe = GL_TRUE;
55	crSPUCopyDispatchTable(&glim, &stubThreadsafeDispatch);
56	}
57	}
58	#endif
59
60
61	/**
62	* Install the given dispatch table as the table used for all gl* calls.
63	*/
64	static void
65	stubSetDispatch( SPUDispatchTable *table )
66	{
67	CRASSERT(table);
68
69	#ifdef CHROMIUM_THREADSAFE
70	/* always set the per-thread dispatch pointer */
71	crSetTSD(&stub.dispatchTSD, (void *) table);
72	if (stub.threadSafe) {
73	/* Do nothing - the thread-safe dispatch functions will call GetTSD()
74	* to get a pointer to the dispatch table, and jump through it.
75	*/
76	}
77	else
78	#endif
79	{
80	/* Single thread mode - just install the caller's dispatch table */
81	/* This conditional is an optimization to try to avoid unnecessary
82	* copying. It seems to work with atlantis, multiwin, etc. but
83	* _could_ be a problem. (Brian)
84	*/
85	if (glim.copy_of != table->copy_of)
86	crSPUCopyDispatchTable(&glim, table);
87	}
88	}
89
90	void stubForcedFlush(GLint con)
91	{
92	#if 0
93	GLint buffer;
94	stub.spu->dispatch_table.GetIntegerv(GL_DRAW_BUFFER, &buffer);
95	stub.spu->dispatch_table.DrawBuffer(GL_FRONT);
96	stub.spu->dispatch_table.Flush();
97	stub.spu->dispatch_table.DrawBuffer(buffer);
98	#else
99	if (con)
100	{
101	stub.spu->dispatch_table.VBoxConFlush(con);
102	}
103	else
104	{
105	stub.spu->dispatch_table.Flush();
106	}
107	#endif
108	}
109
110	void stubConChromiumParameteriCR(GLint con, GLenum param, GLint value)
111	{
112	if (con)
113	stub.spu->dispatch_table.VBoxConChromiumParameteriCR(con, param, value);
114	else
115	crError("VBoxConChromiumParameteriCR called with null connection");
116	}
117
118	void stubConFlush(GLint con)
119	{
120	if (con)
121	stub.spu->dispatch_table.VBoxConFlush(con);
122	else
123	crError("stubConFlush called with null connection");
124	}
125
126	static void stubWindowCleanupForContextsCB(unsigned long key, void data1, void data2)
127	{
128	ContextInfo context = (ContextInfo ) data1;
129
130	CRASSERT(context);
131
132	if (context->currentDrawable == data2)
133	context->currentDrawable = NULL;
134	}
135
136	void stubDestroyWindow( GLint con, GLint window )
137	{
138	WindowInfo winInfo = (WindowInfo )
139	crHashtableSearch(stub.windowTable, (unsigned int) window);
140	if (winInfo && winInfo->type == CHROMIUM && stub.spu)
141	{
142	crHashtableLock(stub.windowTable);
143
144	stub.spu->dispatch_table.VBoxWindowDestroy(con, winInfo->spuWindow );
145
146	#ifdef WINDOWS
147	if (winInfo->hVisibleRegion != INVALID_HANDLE_VALUE)
148	{
149	DeleteObject(winInfo->hVisibleRegion);
150	}
151	#elif defined(GLX)
152	if (winInfo->pVisibleRegions)
153	{
154	XFree(winInfo->pVisibleRegions);
155	}
156	# ifdef CR_NEWWINTRACK
157	if (winInfo->syncDpy)
158	{
159	XCloseDisplay(winInfo->syncDpy);
160	}
161	# endif
162	#endif
163
164	stubForcedFlush(con);
165
166	crHashtableWalk(stub.contextTable, stubWindowCleanupForContextsCB, winInfo);
167
168	crHashtableDelete(stub.windowTable, window, crFree);
169
170	crHashtableUnlock(stub.windowTable);
171	}
172	}
173
174	/**
175	* Create a new _Chromium_ window, not GLX, WGL or CGL.
176	* Called by crWindowCreate() only.
177	*/
178	GLint
179	stubNewWindow( const char *dpyName, GLint visBits )
180	{
181	WindowInfo *winInfo;
182	GLint spuWin, size[2];
183
184	spuWin = stub.spu->dispatch_table.WindowCreate( dpyName, visBits );
185	if (spuWin < 0) {
186	return -1;
187	}
188
189	winInfo = (WindowInfo *) crCalloc(sizeof(WindowInfo));
190	if (!winInfo) {
191	stub.spu->dispatch_table.WindowDestroy(spuWin);
192	return -1;
193	}
194
195	winInfo->type = CHROMIUM;
196
197	/* Ask the head SPU for the initial window size */
198	size[0] = size[1] = 0;
199	stub.spu->dispatch_table.GetChromiumParametervCR(GL_WINDOW_SIZE_CR, 0, GL_INT, 2, size);
200	if (size[0] == 0 && size[1] == 0) {
201	/* use some reasonable defaults */
202	size[0] = size[1] = 512;
203	}
204	winInfo->width = size[0];
205	winInfo->height = size[1];
206	#ifdef VBOX_WITH_WDDM
207	if (stub.bRunningUnderWDDM)
208	{
209	crError("Should not be here: WindowCreate/Destroy & VBoxPackGetInjectID require connection id!");
210	winInfo->mapped = 0;
211	}
212	else
213	#endif
214	{
215	winInfo->mapped = 1;
216	}
217
218	if (!dpyName)
219	dpyName = "";
220
221	crStrncpy(winInfo->dpyName, dpyName, MAX_DPY_NAME);
222	winInfo->dpyName[MAX_DPY_NAME-1] = 0;
223
224	/* Use spuWin as the hash table index and GLX/WGL handle */
225	#ifdef WINDOWS
226	winInfo->drawable = (HDC) spuWin;
227	winInfo->hVisibleRegion = INVALID_HANDLE_VALUE;
228	#elif defined(Darwin)
229	winInfo->drawable = (CGSWindowID) spuWin;
230	#elif defined(GLX)
231	winInfo->drawable = (GLXDrawable) spuWin;
232	winInfo->pVisibleRegions = NULL;
233	winInfo->cVisibleRegions = 0;
234	#endif
235	#ifdef CR_NEWWINTRACK
236	winInfo->u32ClientID = stub.spu->dispatch_table.VBoxPackGetInjectID(0);
237	#endif
238	winInfo->spuWindow = spuWin;
239
240	crHashtableAdd(stub.windowTable, (unsigned int) spuWin, winInfo);
241
242	return spuWin;
243	}
244
245	#ifdef GLX
246	static XErrorHandler oldErrorHandler;
247	static unsigned char lastXError = Success;
248
249	static int
250	errorHandler (Display dpy, XErrorEvent e)
251	{
252	lastXError = e->error_code;
253	return 0;
254	}
255	#endif
256
257	GLboolean
258	stubIsWindowVisible(WindowInfo *win)
259	{
260	#if defined(WINDOWS)
261	# ifdef VBOX_WITH_WDDM
262	if (stub.bRunningUnderWDDM)
263	return win->mapped;
264	# endif
265	return GL_TRUE;
266	#elif defined(Darwin)
267	return GL_TRUE;
268	#elif defined(GLX)
269	Display *dpy = stubGetWindowDisplay(win);
270	if (dpy)
271	{
272	XWindowAttributes attr;
273	XLOCK(dpy);
274	XGetWindowAttributes(dpy, win->drawable, &attr);
275	XUNLOCK(dpy);
276
277	if (attr.map_state == IsUnmapped)
278	{
279	return GL_FALSE;
280	}
281	# if 1
282	return GL_TRUE;
283	# else
284	if (attr.override_redirect)
285	{
286	return GL_TRUE;
287	}
288
289	if (!stub.bXExtensionsChecked)
290	{
291	stubCheckXExtensions(win);
292	}
293
294	if (!stub.bHaveXComposite)
295	{
296	return GL_TRUE;
297	}
298	else
299	{
300	Pixmap p;
301
302	crLockMutex(&stub.mutex);
303
304	XLOCK(dpy);
305	XSync(dpy, false);
306	oldErrorHandler = XSetErrorHandler(errorHandler);
307	/@todo this will create new pixmap for window every call/
308	p = XCompositeNameWindowPixmap(dpy, win->drawable);
309	XSync(dpy, false);
310	XSetErrorHandler(oldErrorHandler);
311	XUNLOCK(dpy);
312
313	switch (lastXError)
314	{
315	case Success:
316	XFreePixmap(dpy, p);
317	crUnlockMutex(&stub.mutex);
318	return GL_FALSE;
319	break;
320	case BadMatch:
321	/Window isn't redirected/
322	lastXError = Success;
323	break;
324	default:
325	crWarning("Unexpected XError %i", (int)lastXError);
326	lastXError = Success;
327	}
328
329	crUnlockMutex(&stub.mutex);
330
331	return GL_TRUE;
332	}
333	# endif
334	}
335	else {
336	/* probably created by crWindowCreate() */
337	return win->mapped;
338	}
339	#endif
340	}
341
342
343	/**
344	* Given a Windows HDC or GLX Drawable, return the corresponding
345	* WindowInfo structure. Create a new one if needed.
346	*/
347	WindowInfo *
348	#ifdef WINDOWS
349	stubGetWindowInfo( HDC drawable )
350	#elif defined(Darwin)
351	stubGetWindowInfo( CGSWindowID drawable )
352	#elif defined(GLX)
353	stubGetWindowInfo( Display *dpy, GLXDrawable drawable )
354	#endif
355	{
356	#ifndef WINDOWS
357	WindowInfo winInfo = (WindowInfo ) crHashtableSearch(stub.windowTable, (unsigned int) drawable);
358	#else
359	WindowInfo *winInfo;
360	HWND hwnd;
361	hwnd = WindowFromDC(drawable);
362
363	if (!hwnd)
364	{
365	return NULL;
366	}
367
368	winInfo = (WindowInfo *) crHashtableSearch(stub.windowTable, (unsigned int) hwnd);
369	#endif
370	if (!winInfo) {
371	winInfo = (WindowInfo *) crCalloc(sizeof(WindowInfo));
372	if (!winInfo)
373	return NULL;
374	#ifdef GLX
375	crStrncpy(winInfo->dpyName, DisplayString(dpy), MAX_DPY_NAME);
376	winInfo->dpyName[MAX_DPY_NAME-1] = 0;
377	winInfo->dpy = dpy;
378	winInfo->pVisibleRegions = NULL;
379	#elif defined(Darwin)
380	winInfo->connection = _CGSDefaultConnection(); // store our connection as default
381	#elif defined(WINDOWS)
382	winInfo->hVisibleRegion = INVALID_HANDLE_VALUE;
383	winInfo->hWnd = hwnd;
384	#endif
385	winInfo->drawable = drawable;
386	winInfo->type = UNDECIDED;
387	winInfo->spuWindow = -1;
388	#ifdef VBOX_WITH_WDDM
389	if (stub.bRunningUnderWDDM)
390	winInfo->mapped = 0;
391	else
392	#endif
393	{
394	winInfo->mapped = -1; /* don't know */
395	}
396	winInfo->pOwner = NULL;
397	#ifdef CR_NEWWINTRACK
398	winInfo->u32ClientID = -1;
399	#endif
400	#ifndef WINDOWS
401	crHashtableAdd(stub.windowTable, (unsigned int) drawable, winInfo);
402	#else
403	crHashtableAdd(stub.windowTable, (unsigned int) hwnd, winInfo);
404	#endif
405	}
406	#ifdef WINDOWS
407	else
408	{
409	winInfo->drawable = drawable;
410	}
411	#endif
412	return winInfo;
413	}
414
415	static void stubWindowCheckOwnerCB(unsigned long key, void data1, void data2);
416
417	static void
418	stubContextFree( ContextInfo *context )
419	{
420	crMemZero(context, sizeof(ContextInfo)); /* just to be safe */
421	crFree(context);
422	}
423
424	static void
425	stubDestroyContextLocked( ContextInfo *context )
426	{
427	unsigned long contextId = context->id;
428	if (context->type == NATIVE) {
429	#ifdef WINDOWS
430	stub.wsInterface.wglDeleteContext( context->hglrc );
431	#elif defined(Darwin)
432	stub.wsInterface.CGLDestroyContext( context->cglc );
433	#elif defined(GLX)
434	stub.wsInterface.glXDestroyContext( context->dpy, context->glxContext );
435	#endif
436	}
437	else if (context->type == CHROMIUM) {
438	/* Have pack SPU or tilesort SPU, etc. destroy the context */
439	CRASSERT(context->spuContext >= 0);
440	stub.spu->dispatch_table.DestroyContext( context->spuContext );
441	crHashtableWalk(stub.windowTable, stubWindowCheckOwnerCB, context);
442	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
443	if (context->spuConnection)
444	{
445	stub.spu->dispatch_table.VBoxConDestroy(context->spuConnection);
446	context->spuConnection = 0;
447	}
448	#endif
449	}
450
451	#ifdef GLX
452	crFreeHashtable(context->pGLXPixmapsHash, crFree);
453	if (context->damageDpy)
454	{
455	XCloseDisplay(context->damageDpy);
456	}
457	#endif
458
459	crHashtableDelete(stub.contextTable, contextId, NULL);
460	}
461
462	#ifdef CHROMIUM_THREADSAFE
463	static DECLCALLBACK(void) stubContextDtor(void*pvContext)
464	{
465	stubContextFree((ContextInfo*)pvContext);
466	}
467	#endif
468
469	/**
470	* Allocate a new ContextInfo object, initialize it, put it into the
471	* context hash table. If type==CHROMIUM, call the head SPU's
472	* CreateContext() function too.
473	*/
474	ContextInfo *
475	stubNewContext( const char *dpyName, GLint visBits, ContextType type,
476	unsigned long shareCtx
477	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
478	, struct VBOXUHGSMI *pHgsmi
479	#endif
480	)
481	{
482	GLint spuContext = -1, spuShareCtx = 0, spuConnection = 0;
483	ContextInfo *context;
484
485	if (shareCtx > 0) {
486	/* translate shareCtx to a SPU context ID */
487	context = (ContextInfo *)
488	crHashtableSearch(stub.contextTable, shareCtx);
489	if (context)
490	spuShareCtx = context->spuContext;
491	}
492
493	if (type == CHROMIUM) {
494	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
495	if (pHgsmi)
496	{
497	spuConnection = stub.spu->dispatch_table.VBoxConCreate(pHgsmi);
498	if (!spuConnection)
499	{
500	crWarning("VBoxConCreate failed");
501	return NULL;
502	}
503	}
504	#endif
505	spuContext
506	= stub.spu->dispatch_table.VBoxCreateContext(spuConnection, dpyName, visBits, spuShareCtx);
507	if (spuContext < 0)
508	{
509	crWarning("VBoxCreateContext failed");
510	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
511	if (spuConnection)
512	stub.spu->dispatch_table.VBoxConDestroy(spuConnection);
513	#endif
514	return NULL;
515	}
516	}
517
518	context = crCalloc(sizeof(ContextInfo));
519	if (!context) {
520	stub.spu->dispatch_table.DestroyContext(spuContext);
521	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
522	if (spuConnection)
523	stub.spu->dispatch_table.VBoxConDestroy(spuConnection);
524	#endif
525	return NULL;
526	}
527
528	if (!dpyName)
529	dpyName = "";
530
531	context->id = stub.freeContextNumber++;
532	context->type = type;
533	context->spuContext = spuContext;
534	context->visBits = visBits;
535	context->currentDrawable = NULL;
536	crStrncpy(context->dpyName, dpyName, MAX_DPY_NAME);
537	context->dpyName[MAX_DPY_NAME-1] = 0;
538
539	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
540	context->spuConnection = spuConnection;
541	context->pHgsmi = pHgsmi;
542	#endif
543
544	#ifdef CHROMIUM_THREADSAFE
545	VBoxTlsRefInit(context, stubContextDtor);
546	#endif
547
548	#if defined(GLX) \|\| defined(DARWIN)
549	context->share = (ContextInfo *)
550	crHashtableSearch(stub.contextTable, (unsigned long) shareCtx);
551	#endif
552
553	#ifdef GLX
554	context->pGLXPixmapsHash = crAllocHashtable();
555	context->damageInitFailed = GL_FALSE;
556	context->damageDpy = NULL;
557	context->damageEventsBase = 0;
558	#endif
559
560	crHashtableAdd(stub.contextTable, context->id, (void *) context);
561
562	return context;
563	}
564
565
566	#ifdef Darwin
567
568	#define SET_ATTR(l,i,a) ( (l)[(i)++] = (a) )
569	#define SET_ATTR_V(l,i,a,v) ( SET_ATTR(l,i,a), SET_ATTR(l,i,v) )
570
571	void stubSetPFA( ContextInfo ctx, CGLPixelFormatAttribute attribs, int size, GLint *num ) {
572	GLuint visual = ctx->visBits;
573	int i = 0;
574
575	CRASSERT(visual & CR_RGB_BIT);
576
577	SET_ATTR_V(attribs, i, kCGLPFAColorSize, 8);
578
579	if( visual & CR_DEPTH_BIT )
580	SET_ATTR_V(attribs, i, kCGLPFADepthSize, 16);
581
582	if( visual & CR_ACCUM_BIT )
583	SET_ATTR_V(attribs, i, kCGLPFAAccumSize, 1);
584
585	if( visual & CR_STENCIL_BIT )
586	SET_ATTR_V(attribs, i, kCGLPFAStencilSize, 1);
587
588	if( visual & CR_ALPHA_BIT )
589	SET_ATTR_V(attribs, i, kCGLPFAAlphaSize, 1);
590
591	if( visual & CR_DOUBLE_BIT )
592	SET_ATTR(attribs, i, kCGLPFADoubleBuffer);
593
594	if( visual & CR_STEREO_BIT )
595	SET_ATTR(attribs, i, kCGLPFAStereo);
596
597	/* SET_ATTR_V(attribs, i, kCGLPFASampleBuffers, 1);
598	SET_ATTR_V(attribs, i, kCGLPFASamples, 0);
599	SET_ATTR_V(attribs, i, kCGLPFADisplayMask, 0); */
600	SET_ATTR(attribs, i, kCGLPFABackingStore);
601	SET_ATTR(attribs, i, kCGLPFAWindow);
602	SET_ATTR_V(attribs, i, kCGLPFADisplayMask, ctx->disp_mask);
603
604	SET_ATTR(attribs, i, 0);
605
606	*num = i;
607	}
608
609	#endif
610
611	/**
612	* This creates a native GLX/WGL context.
613	*/
614	static GLboolean
615	InstantiateNativeContext( WindowInfo window, ContextInfo context )
616	{
617	#ifdef WINDOWS
618	context->hglrc = stub.wsInterface.wglCreateContext( window->drawable );
619	return context->hglrc ? GL_TRUE : GL_FALSE;
620	#elif defined(Darwin)
621	CGLContextObj shareCtx = NULL;
622	CGLPixelFormatObj pix;
623	long npix;
624
625	CGLPixelFormatAttribute attribs[16];
626	GLint ind = 0;
627
628	if( context->share ) {
629	if( context->cglc != context->share->cglc ) {
630	crWarning("CGLCreateContext() is trying to share a non-existant "
631	"CGL context. Setting share context to zero.");
632	shareCtx = 0;
633	}
634	else
635	shareCtx = context->cglc;
636	}
637
638	stubSetPFA( context, attribs, 16, &ind );
639
640	stub.wsInterface.CGLChoosePixelFormat( attribs, &pix, &npix );
641	stub.wsInterface.CGLCreateContext( pix, shareCtx, &context->cglc );
642	if( !context->cglc )
643	crError("InstantiateNativeContext: Couldn't Create the context!");
644
645	stub.wsInterface.CGLDestroyPixelFormat( pix );
646
647	if( context->parambits ) {
648	/* Set the delayed parameters */
649	if( context->parambits & VISBIT_SWAP_RECT )
650	stub.wsInterface.CGLSetParameter( context->cglc, kCGLCPSwapRectangle, context->swap_rect );
651
652	if( context->parambits & VISBIT_SWAP_INTERVAL )
653	stub.wsInterface.CGLSetParameter( context->cglc, kCGLCPSwapInterval, &(context->swap_interval) );
654
655	if( context->parambits & VISBIT_CLIENT_STORAGE )
656	stub.wsInterface.CGLSetParameter( context->cglc, kCGLCPClientStorage, (long*)&(context->client_storage) );
657
658	context->parambits = 0;
659	}
660
661	return context->cglc ? GL_TRUE : GL_FALSE;
662	#elif defined(GLX)
663	GLXContext shareCtx = 0;
664
665	/* sort out context sharing here */
666	if (context->share) {
667	if (context->glxContext != context->share->glxContext) {
668	crWarning("glXCreateContext() is trying to share a non-existant "
669	"GLX context. Setting share context to zero.");
670	shareCtx = 0;
671	}
672	else {
673	shareCtx = context->glxContext;
674	}
675	}
676
677	context->glxContext = stub.wsInterface.glXCreateContext( window->dpy,
678	context->visual, shareCtx, context->direct );
679
680	return context->glxContext ? GL_TRUE : GL_FALSE;
681	#endif
682	}
683
684
685	/**
686	* Utility functions to get window size and titlebar text.
687	*/
688	#ifdef WINDOWS
689
690	void
691	stubGetWindowGeometry(const WindowInfo window, int x, int *y,
692	unsigned int w, unsigned int h )
693	{
694	RECT rect;
695
696	if (!window->drawable \|\| !window->hWnd) {
697	w = h = 0;
698	return;
699	}
700
701	if (window->hWnd!=WindowFromDC(window->drawable))
702	{
703	crWarning("Window(%i) DC is no longer valid", window->spuWindow);
704	return;
705	}
706
707	if (!GetClientRect(window->hWnd, &rect))
708	{
709	crWarning("GetClientRect failed for %p", window->hWnd);
710	w = h = 0;
711	return;
712	}
713	*w = rect.right - rect.left;
714	*h = rect.bottom - rect.top;
715
716	if (!ClientToScreen( window->hWnd, (LPPOINT) &rect ))
717	{
718	crWarning("ClientToScreen failed for %p", window->hWnd);
719	w = h = 0;
720	return;
721	}
722	*x = rect.left;
723	*y = rect.top;
724	}
725
726	static void
727	GetWindowTitle( const WindowInfo window, char title )
728	{
729	/* XXX - we don't handle recurseUp */
730	if (window->hWnd)
731	GetWindowText(window->hWnd, title, 100);
732	else
733	title[0] = 0;
734	}
735
736	static void
737	GetCursorPosition(WindowInfo *window, int pos[2])
738	{
739	RECT rect;
740	POINT point;
741	GLint size[2], x, y;
742	unsigned int NativeHeight, NativeWidth, ChromiumHeight, ChromiumWidth;
743	float WidthRatio, HeightRatio;
744	static int DebugFlag = 0;
745
746	// apparently the "window" parameter passed to this
747	// function contains the native window information
748	HWND NATIVEhwnd = window->hWnd;
749
750	if (NATIVEhwnd!=WindowFromDC(window->drawable))
751	{
752	crWarning("Window(%i) DC is no longer valid", window->spuWindow);
753	return;
754	}
755
756	// get the native window's height and width
757	stubGetWindowGeometry(window, &x, &y, &NativeWidth, &NativeHeight);
758
759	// get the spu window's height and width
760	stub.spu->dispatch_table.GetChromiumParametervCR(GL_WINDOW_SIZE_CR, window->spuWindow, GL_INT, 2, size);
761	ChromiumWidth = size[0];
762	ChromiumHeight = size[1];
763
764	// get the ratio of the size of the native window to the cr window
765	WidthRatio = (float)ChromiumWidth / (float)NativeWidth;
766	HeightRatio = (float)ChromiumHeight / (float)NativeHeight;
767
768	// output some debug information at the beginning
769	if(DebugFlag)
770	{
771	DebugFlag = 0;
772	crDebug("Native Window Handle = %d", NATIVEhwnd);
773	crDebug("Native Width = %i", NativeWidth);
774	crDebug("Native Height = %i", NativeHeight);
775	crDebug("Chromium Width = %i", ChromiumWidth);
776	crDebug("Chromium Height = %i", ChromiumHeight);
777	}
778
779	if (NATIVEhwnd)
780	{
781	GetClientRect( NATIVEhwnd, &rect );
782	GetCursorPos (&point);
783
784	// make sure these coordinates are relative to the native window,
785	// not the whole desktop
786	ScreenToClient(NATIVEhwnd, &point);
787
788	// calculate the new position of the virtual cursor
789	pos[0] = (int)(point.x * WidthRatio);
790	pos[1] = (int)((NativeHeight - point.y) * HeightRatio);
791	}
792	else
793	{
794	pos[0] = 0;
795	pos[1] = 0;
796	}
797	}
798
799	#elif defined(Darwin)
800
801	extern OSStatus CGSGetScreenRectForWindow( CGSConnectionID cid, CGSWindowID wid, float *outRect );
802	extern OSStatus CGSGetWindowBounds( CGSConnectionID cid, CGSWindowID wid, float *bounds );
803
804	void
805	stubGetWindowGeometry( const WindowInfo window, int x, int y, unsigned int w, unsigned int *h )
806	{
807	float rect[4];
808
809	if( !window \|\|
810	!window->connection \|\|
811	!window->drawable \|\|
812	CGSGetWindowBounds( window->connection, window->drawable, rect ) != noErr )
813	{
814	x = y = 0;
815	w = h = 0;
816	} else {
817	*x = (int) rect[0];
818	*y = (int) rect[1];
819	*w = (int) rect[2];
820	*h = (int) rect[3];
821	}
822	}
823
824
825	static void
826	GetWindowTitle( const WindowInfo window, char title )
827	{
828	/* XXX \todo Darwin window Title */
829	title[0] = '\0';
830	}
831
832
833	static void
834	GetCursorPosition( const WindowInfo *window, int pos[2] )
835	{
836	Point mouse_pos;
837	float window_rect[4];
838
839	GetMouse( &mouse_pos );
840	CGSGetScreenRectForWindow( window->connection, window->drawable, window_rect );
841
842	pos[0] = mouse_pos.h - (int) window_rect[0];
843	pos[1] = (int) window_rect[3] - (mouse_pos.v - (int) window_rect[1]);
844
845	/crDebug( "%i %i", pos[0], pos[1] );/
846	}
847
848	#elif defined(GLX)
849
850	void
851	stubGetWindowGeometry(WindowInfo window, int x, int y, unsigned int w, unsigned int *h)
852	{
853	Window root, child;
854	unsigned int border, depth;
855	Display *dpy;
856
857	dpy = stubGetWindowDisplay(window);
858
859	//@todo: Performing those checks is expensive operation, especially for simple apps with high FPS.
860	// Disabling those triples glxgears fps, thus using xevents instead of per frame polling is much more preferred.
861	//@todo: Check similar on windows guests, though doubtful as there're no XSync like calls on windows.
862	if (window && dpy)
863	{
864	XLOCK(dpy);
865	}
866
867	if (!window
868	\|\| !dpy
869	\|\| !window->drawable
870	\|\| !XGetGeometry(dpy, window->drawable, &root, x, y, w, h, &border, &depth)
871	\|\| !XTranslateCoordinates(dpy, window->drawable, root, 0, 0, x, y, &child))
872	{
873	crWarning("Failed to get windows geometry for %p, try xwininfo", window);
874	x = y = 0;
875	w = h = 0;
876	}
877
878	if (window && dpy)
879	{
880	XUNLOCK(dpy);
881	}
882	}
883
884	static char *
885	GetWindowTitleHelper( Display *dpy, Window window, GLboolean recurseUp )
886	{
887	while (1) {
888	char *name;
889	if (!XFetchName(dpy, window, &name))
890	return NULL;
891	if (name[0]) {
892	return name;
893	}
894	else if (recurseUp) {
895	/* This window has no name, try the parent */
896	Status stat;
897	Window root, parent, *children;
898	unsigned int numChildren;
899	stat = XQueryTree( dpy, window, &root, &parent,
900	&children, &numChildren );
901	if (!stat \|\| window == root)
902	return NULL;
903	if (children)
904	XFree(children);
905	window = parent;
906	}
907	else {
908	XFree(name);
909	return NULL;
910	}
911	}
912	}
913
914	static void
915	GetWindowTitle( const WindowInfo window, char title )
916	{
917	char *t = GetWindowTitleHelper(window->dpy, window->drawable, GL_TRUE);
918	if (t) {
919	crStrcpy(title, t);
920	XFree(t);
921	}
922	else {
923	title[0] = 0;
924	}
925	}
926
927
928	/**
929	*Return current cursor position in local window coords.
930	*/
931	static void
932	GetCursorPosition(WindowInfo *window, int pos[2] )
933	{
934	int rootX, rootY;
935	Window root, child;
936	unsigned int mask;
937	int x, y;
938
939	XLOCK(window->dpy);
940
941	Bool q = XQueryPointer(window->dpy, window->drawable, &root, &child,
942	&rootX, &rootY, &pos[0], &pos[1], &mask);
943	if (q) {
944	unsigned int w, h;
945	stubGetWindowGeometry( window, &x, &y, &w, &h );
946	/* invert Y */
947	pos[1] = (int) h - pos[1] - 1;
948	}
949	else {
950	pos[0] = pos[1] = 0;
951	}
952
953	XUNLOCK(window->dpy);
954	}
955
956	#endif
957
958
959	/**
960	* This function is called by MakeCurrent() and determines whether or
961	* not a new rendering context should be bound to Chromium or the native
962	* OpenGL.
963	* \return GL_FALSE if native OpenGL should be used, or GL_TRUE if Chromium
964	* should be used.
965	*/
966	static GLboolean
967	stubCheckUseChromium( WindowInfo *window )
968	{
969	int x, y;
970	unsigned int w, h;
971
972	/* If the provided window is CHROMIUM, we're clearly intended
973	* to create a CHROMIUM context.
974	*/
975	if (window->type == CHROMIUM)
976	return GL_TRUE;
977
978	if (stub.ignoreFreeglutMenus) {
979	const char *glutMenuTitle = "freeglut menu";
980	char title[1000];
981	GetWindowTitle(window, title);
982	if (crStrcmp(title, glutMenuTitle) == 0) {
983	crDebug("GL faker: Ignoring freeglut menu window");
984	return GL_FALSE;
985	}
986	}
987
988	/* If the user's specified a window count for Chromium, see if
989	* this window satisfies that criterium.
990	*/
991	stub.matchChromiumWindowCounter++;
992	if (stub.matchChromiumWindowCount > 0) {
993	if (stub.matchChromiumWindowCounter != stub.matchChromiumWindowCount) {
994	crDebug("Using native GL, app window doesn't meet match_window_count");
995	return GL_FALSE;
996	}
997	}
998
999	/* If the user's specified a window list to ignore, see if this
1000	* window satisfies that criterium.
1001	*/
1002	if (stub.matchChromiumWindowID) {
1003	GLuint i;
1004
1005	for (i = 0; i <= stub.numIgnoreWindowID; i++) {
1006	if (stub.matchChromiumWindowID[i] == stub.matchChromiumWindowCounter) {
1007	crDebug("Ignore window ID %d, using native GL", stub.matchChromiumWindowID[i]);
1008	return GL_FALSE;
1009	}
1010	}
1011	}
1012
1013	/* If the user's specified a minimum window size for Chromium, see if
1014	* this window satisfies that criterium.
1015	*/
1016	if (stub.minChromiumWindowWidth > 0 &&
1017	stub.minChromiumWindowHeight > 0) {
1018	stubGetWindowGeometry( window, &x, &y, &w, &h );
1019	if (w >= stub.minChromiumWindowWidth &&
1020	h >= stub.minChromiumWindowHeight) {
1021
1022	/* Check for maximum sized window now too */
1023	if (stub.maxChromiumWindowWidth &&
1024	stub.maxChromiumWindowHeight) {
1025	if (w < stub.maxChromiumWindowWidth &&
1026	h < stub.maxChromiumWindowHeight)
1027	return GL_TRUE;
1028	else
1029	return GL_FALSE;
1030	}
1031
1032	return GL_TRUE;
1033	}
1034	crDebug("Using native GL, app window doesn't meet minimum_window_size");
1035	return GL_FALSE;
1036	}
1037	else if (stub.matchWindowTitle) {
1038	/* If the user's specified a window title for Chromium, see if this
1039	* window satisfies that criterium.
1040	*/
1041	GLboolean wildcard = GL_FALSE;
1042	char title[1000];
1043	char *titlePattern;
1044	int len;
1045	/* check for leading '' wildcard /
1046	if (stub.matchWindowTitle[0] == '*') {
1047	titlePattern = crStrdup( stub.matchWindowTitle + 1 );
1048	wildcard = GL_TRUE;
1049	}
1050	else {
1051	titlePattern = crStrdup( stub.matchWindowTitle );
1052	}
1053	/* check for trailing '' wildcard /
1054	len = crStrlen(titlePattern);
1055	if (len > 0 && titlePattern[len - 1] == '*') {
1056	titlePattern[len - 1] = '\0'; /* terminate here */
1057	wildcard = GL_TRUE;
1058	}
1059
1060	GetWindowTitle( window, title );
1061	if (title[0]) {
1062	if (wildcard) {
1063	if (crStrstr(title, titlePattern)) {
1064	crFree(titlePattern);
1065	return GL_TRUE;
1066	}
1067	}
1068	else if (crStrcmp(title, titlePattern) == 0) {
1069	crFree(titlePattern);
1070	return GL_TRUE;
1071	}
1072	}
1073	crFree(titlePattern);
1074	crDebug("Using native GL, app window title doesn't match match_window_title string (\"%s\" != \"%s\")", title, stub.matchWindowTitle);
1075	return GL_FALSE;
1076	}
1077
1078	/* Window title and size don't matter */
1079	CRASSERT(stub.minChromiumWindowWidth == 0);
1080	CRASSERT(stub.minChromiumWindowHeight == 0);
1081	CRASSERT(stub.matchWindowTitle == NULL);
1082
1083	/* User hasn't specified a width/height or window title.
1084	* We'll use chromium for this window (and context) if no other is.
1085	*/
1086
1087	return GL_TRUE; /* use Chromium! */
1088	}
1089
1090	static void stubWindowCheckOwnerCB(unsigned long key, void data1, void data2)
1091	{
1092	WindowInfo pWindow = (WindowInfo ) data1;
1093	ContextInfo pCtx = (ContextInfo ) data2;
1094
1095	if (pWindow->pOwner == pCtx)
1096	{
1097	#ifdef WINDOWS
1098	/* Note: can't use WindowFromDC(context->pOwnWindow->drawable) here
1099	because GL context is already released from DC and actual guest window
1100	could be destroyed.
1101	*/
1102	stubDestroyWindow(CR_CTX_CON(pCtx), (GLint)pWindow->hWnd);
1103	#else
1104	stubDestroyWindow(CR_CTX_CON(pCtx), (GLint)pWindow->drawable);
1105	#endif
1106	}
1107	}
1108
1109	GLboolean stubCtxCreate(ContextInfo *context)
1110	{
1111	/*
1112	* Create a Chromium context.
1113	*/
1114	#if defined(GLX) \|\| defined(DARWIN)
1115	GLint spuShareCtx = context->share ? context->share->spuContext : 0;
1116	#else
1117	GLint spuShareCtx = 0;
1118	#endif
1119	GLint spuConnection = 0;
1120	CRASSERT(stub.spu);
1121	CRASSERT(stub.spu->dispatch_table.CreateContext);
1122	context->type = CHROMIUM;
1123
1124	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
1125	if (context->pHgsmi)
1126	{
1127	spuConnection = stub.spu->dispatch_table.VBoxConCreate(context->pHgsmi);
1128	if (!spuConnection)
1129	{
1130	crWarning("VBoxConCreate failed");
1131	return GL_FALSE;
1132	}
1133	context->spuConnection = spuConnection;
1134	}
1135	#endif
1136
1137	context->spuContext
1138	= stub.spu->dispatch_table.VBoxCreateContext(spuConnection, context->dpyName,
1139	context->visBits,
1140	spuShareCtx);
1141
1142	return GL_TRUE;
1143	}
1144
1145	GLboolean stubCtxCheckCreate(ContextInfo *context)
1146	{
1147	if (context->type == UNDECIDED)
1148	return stubCtxCreate(context);
1149	return CHROMIUM == context->type;
1150	}
1151
1152
1153	GLboolean
1154	stubMakeCurrent( WindowInfo window, ContextInfo context )
1155	{
1156	GLboolean retVal;
1157
1158	/*
1159	* Get WindowInfo and ContextInfo pointers.
1160	*/
1161
1162	if (!context \|\| !window) {
1163	ContextInfo * currentContext = stubGetCurrentContext();
1164	if (currentContext)
1165	currentContext->currentDrawable = NULL;
1166	if (context)
1167	context->currentDrawable = NULL;
1168	stubSetCurrentContext(NULL);
1169	return GL_TRUE; /* OK */
1170	}
1171
1172	#ifdef CHROMIUM_THREADSAFE
1173	stubCheckMultithread();
1174	#endif
1175
1176	if (context->type == UNDECIDED) {
1177	/* Here's where we really create contexts */
1178	#ifdef CHROMIUM_THREADSAFE
1179	crLockMutex(&stub.mutex);
1180	#endif
1181
1182	if (stubCheckUseChromium(window)) {
1183	GLint spuConnection = 0;
1184
1185	if (!stubCtxCreate(context))
1186	{
1187	crWarning("stubCtxCreate failed");
1188	return GL_FALSE;
1189	}
1190
1191	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
1192	spuConnection = context->spuConnection;
1193	#endif
1194
1195	if (window->spuWindow == -1)
1196	{
1197	/crDebug("(1)stubMakeCurrent ctx=%p(%i) window=%p(%i)", context, context->spuContext, window, window->spuWindow);/
1198	window->spuWindow = stub.spu->dispatch_table.VBoxWindowCreate(spuConnection, window->dpyName, context->visBits );
1199	#ifdef CR_NEWWINTRACK
1200	window->u32ClientID = stub.spu->dispatch_table.VBoxPackGetInjectID(spuConnection);
1201	#endif
1202	}
1203	}
1204	else {
1205	/*
1206	* Create a native OpenGL context.
1207	*/
1208	if (!InstantiateNativeContext(window, context))
1209	{
1210	#ifdef CHROMIUM_THREADSAFE
1211	crUnlockMutex(&stub.mutex);
1212	#endif
1213	return 0; /* false */
1214	}
1215	context->type = NATIVE;
1216	}
1217
1218	#ifdef CHROMIUM_THREADSAFE
1219	crUnlockMutex(&stub.mutex);
1220	#endif
1221	}
1222
1223
1224	if (context->type == NATIVE) {
1225	/*
1226	* Native OpenGL MakeCurrent().
1227	*/
1228	#ifdef WINDOWS
1229	retVal = (GLboolean) stub.wsInterface.wglMakeCurrent( window->drawable, context->hglrc );
1230	#elif defined(Darwin)
1231	// XXX \todo We need to differentiate between these two..
1232	retVal = ( stub.wsInterface.CGLSetSurface(context->cglc, window->connection, window->drawable, window->surface) == noErr );
1233	retVal = ( stub.wsInterface.CGLSetCurrentContext(context->cglc) == noErr );
1234	#elif defined(GLX)
1235	retVal = (GLboolean) stub.wsInterface.glXMakeCurrent( window->dpy, window->drawable, context->glxContext );
1236	#endif
1237	}
1238	else {
1239	/*
1240	* SPU chain MakeCurrent().
1241	*/
1242	CRASSERT(context->type == CHROMIUM);
1243	CRASSERT(context->spuContext >= 0);
1244
1245	/*if (context->currentDrawable && context->currentDrawable != window)
1246	crDebug("Rebinding context %p to a different window", context);*/
1247
1248	if (window->type == NATIVE) {
1249	crWarning("Can't rebind a chromium context to a native window\n");
1250	retVal = 0;
1251	}
1252	else {
1253	if (window->spuWindow == -1)
1254	{
1255	/crDebug("(2)stubMakeCurrent ctx=%p(%i) window=%p(%i)", context, context->spuContext, window, window->spuWindow);/
1256	window->spuWindow = stub.spu->dispatch_table.VBoxWindowCreate(
1257	#if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
1258	context->spuConnection,
1259	#else
1260	0,
1261	#endif
1262	window->dpyName, context->visBits );
1263	#ifdef CR_NEWWINTRACK
1264	window->u32ClientID = stub.spu->dispatch_table.VBoxPackGetInjectID(
1265	# if defined(VBOX_WITH_CRHGSMI) && defined(IN_GUEST)
1266	context->spuConnection
1267	# else
1268	0
1269	# endif
1270	);
1271	#endif
1272	if (context->currentDrawable && context->currentDrawable->type==CHROMIUM
1273	&& context->currentDrawable->pOwner==context)
1274	{
1275	#ifdef WINDOWS
1276	if (context->currentDrawable->hWnd!=WindowFromDC(context->currentDrawable->drawable))
1277	{
1278	stubDestroyWindow(CR_CTX_CON(context), (GLint)context->currentDrawable->hWnd);
1279	}
1280	#else
1281	Window root;
1282	int x, y;
1283	unsigned int border, depth, w, h;
1284
1285	XLOCK(context->currentDrawable->dpy);
1286	if (!XGetGeometry(context->currentDrawable->dpy, context->currentDrawable->drawable, &root, &x, &y, &w, &h, &border, &depth))
1287	{
1288	stubDestroyWindow(CR_CTX_CON(context), (GLint)context->currentDrawable->drawable);
1289	}
1290	XUNLOCK(context->currentDrawable->dpy);
1291	#endif
1292
1293	}
1294	}
1295
1296	if (window->spuWindow != (GLint)window->drawable)
1297	stub.spu->dispatch_table.MakeCurrent( window->spuWindow, (GLint) window->drawable, context->spuContext );
1298	else
1299	stub.spu->dispatch_table.MakeCurrent( window->spuWindow, 0, /* native window handle */ context->spuContext );
1300
1301	retVal = 1;
1302	}
1303	}
1304
1305	window->type = context->type;
1306	window->pOwner = context;
1307	context->currentDrawable = window;
1308	stubSetCurrentContext(context);
1309
1310	if (retVal) {
1311	/* Now, if we've transitions from Chromium to native rendering, or
1312	* vice versa, we have to change all the OpenGL entrypoint pointers.
1313	*/
1314	if (context->type == NATIVE) {
1315	/* Switch to native API */
1316	/printf(" Switching to native API\n");/
1317	stubSetDispatch(&stub.nativeDispatch);
1318	}
1319	else if (context->type == CHROMIUM) {
1320	/* Switch to stub (SPU) API */
1321	/printf(" Switching to spu API\n");/
1322	stubSetDispatch(&stub.spuDispatch);
1323	}
1324	else {
1325	/* no API switch needed */
1326	}
1327	}
1328
1329	if (!window->width && window->type == CHROMIUM) {
1330	/* One time window setup */
1331	int x, y;
1332	unsigned int winW, winH;
1333
1334	stubGetWindowGeometry( window, &x, &y, &winW, &winH );
1335
1336	/* If we're not using GLX/WGL (no app window) we'll always get
1337	* a width and height of zero here. In that case, skip the viewport
1338	* call since we're probably using a tilesort SPU with fake_window_dims
1339	* which the tilesort SPU will use for the viewport.
1340	*/
1341	window->width = winW;
1342	window->height = winH;
1343	#if defined(WINDOWS) && defined(VBOX_WITH_WDDM)
1344	if (stubIsWindowVisible(window))
1345	#endif
1346	{
1347	if (stub.trackWindowSize)
1348	stub.spuDispatch.WindowSize( window->spuWindow, winW, winH );
1349	if (stub.trackWindowPos)
1350	stub.spuDispatch.WindowPosition(window->spuWindow, x, y);
1351	if (winW > 0 && winH > 0)
1352	stub.spu->dispatch_table.Viewport( 0, 0, winW, winH );
1353	}
1354	#ifdef VBOX_WITH_WDDM
1355	if (stub.trackWindowVisibleRgn)
1356	stub.spu->dispatch_table.WindowVisibleRegion(window->spuWindow, 0, NULL);
1357	#endif
1358	}
1359
1360	/* Update window mapping state.
1361	* Basically, this lets us hide render SPU windows which correspond
1362	* to unmapped application windows. Without this, "pertly" (for example)
1363	* opens lots of temporary windows which otherwise clutter the screen.
1364	*/
1365	if (stub.trackWindowVisibility && window->type == CHROMIUM && window->drawable) {
1366	const int mapped = stubIsWindowVisible(window);
1367	if (mapped != window->mapped) {
1368	crDebug("Dispatched: WindowShow(%i, %i)", window->spuWindow, mapped);
1369	stub.spu->dispatch_table.WindowShow(window->spuWindow, mapped);
1370	window->mapped = mapped;
1371	}
1372	}
1373
1374	return retVal;
1375	}
1376
1377	void
1378	stubDestroyContext( unsigned long contextId )
1379	{
1380	ContextInfo *context;
1381
1382	if (!stub.contextTable) {
1383	return;
1384	}
1385
1386	/* the lock order is windowTable->contextTable (see wglMakeCurrent_prox, glXMakeCurrent)
1387	* this is why we need to take a windowTable lock since we will later do stub.windowTable access & locking */
1388	crHashtableLock(stub.windowTable);
1389	crHashtableLock(stub.contextTable);
1390
1391	context = (ContextInfo *) crHashtableSearch(stub.contextTable, contextId);
1392
1393	CRASSERT(context);
1394
1395	stubDestroyContextLocked(context);
1396
1397	#ifdef CHROMIUM_THREADSAFE
1398	if (stubGetCurrentContext() == context) {
1399	stubSetCurrentContext(NULL);
1400	}
1401
1402	VBoxTlsRefMarkDestroy(context);
1403	VBoxTlsRefRelease(context);
1404	#else
1405	if (stubGetCurrentContext() == context) {
1406	stubSetCurrentContext(NULL);
1407	}
1408	stubContextFree(context);
1409	#endif
1410	crHashtableUnlock(stub.contextTable);
1411	crHashtableUnlock(stub.windowTable);
1412	}
1413
1414	void
1415	stubSwapBuffers(WindowInfo *window, GLint flags)
1416	{
1417	if (!window)
1418	return;
1419
1420	/* Determine if this window is being rendered natively or through
1421	* Chromium.
1422	*/
1423
1424	if (window->type == NATIVE) {
1425	/printf("** Swapping native window %d\n", (int) drawable);*/
1426	#ifdef WINDOWS
1427	(void) stub.wsInterface.wglSwapBuffers( window->drawable );
1428	#elif defined(Darwin)
1429	/* ...is this ok? */
1430	/* stub.wsInterface.CGLFlushDrawable( context->cglc ); */
1431	crDebug("stubSwapBuffers: unable to swap (no context!)");
1432	#elif defined(GLX)
1433	stub.wsInterface.glXSwapBuffers( window->dpy, window->drawable );
1434	#endif
1435	}
1436	else if (window->type == CHROMIUM) {
1437	/* Let the SPU do the buffer swap */
1438	/printf("** Swapping chromium window %d\n", (int) drawable);*/
1439	if (stub.appDrawCursor) {
1440	int pos[2];
1441	GetCursorPosition(window, pos);
1442	stub.spu->dispatch_table.ChromiumParametervCR(GL_CURSOR_POSITION_CR, GL_INT, 2, pos);
1443	}
1444	stub.spu->dispatch_table.SwapBuffers( window->spuWindow, flags );
1445	}
1446	else {
1447	crDebug("Calling SwapBuffers on a window we haven't seen before (no-op).");
1448	}
1449	}

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source: vbox/trunk/src/VBox/Additions/common/crOpenGL/context.c@ 48999

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