VBoxDisplay.cpp@ 62865

Last change on this file since 62865 was 62865, checked in by vboxsync, 8 years ago
3D: report guest screen position to the host when the user rearranges screens in the guest. bugref:8450
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1	/* $Id: VBoxDisplay.cpp 62865 2016-08-02 10:11:36Z vboxsync $ */
2	/** @file
3	* VBoxSeamless - Display notifications.
4	*/
5
6	/*
7	* Copyright (C) 2006-2016 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.virtualbox.org. This file is free software;
11	* you can redistribute it and/or modify it under the terms of the GNU
12	* General Public License (GPL) as published by the Free Software
13	* Foundation, in version 2 as it comes in the "COPYING" file of the
14	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
15	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
16	*/
17	#include "VBoxTray.h"
18	#include "VBoxHelpers.h"
19	#include "VBoxSeamless.h"
20
21	#include <malloc.h>
22
23	#include <iprt/assert.h>
24	#ifdef VBOX_WITH_WDDM
25	# include <iprt/asm.h>
26	#endif
27
28	#ifdef DEBUG
29	# define LOG_ENABLED
30	# define LOG_GROUP LOG_GROUP_DEFAULT
31	#endif
32	#include <VBox/log.h>
33	#include <VBox/VMMDev.h>
34
35	#include <VBoxDisplay.h>
36	#include <VBoxHook.h>
37
38
39
40	typedef struct _VBOXDISPLAYCONTEXT
41	{
42	const VBOXSERVICEENV *pEnv;
43	BOOL fAnyX;
44	/** ChangeDisplaySettingsEx does not exist in NT. ResizeDisplayDevice uses the function. */
45	LONG (WINAPI * pfnChangeDisplaySettingsEx)(LPCTSTR lpszDeviceName, LPDEVMODE lpDevMode, HWND hwnd, DWORD dwflags, LPVOID lParam);
46	/** EnumDisplayDevices does not exist in NT. isVBoxDisplayDriverActive et al. are using these functions. */
47	BOOL (WINAPI * pfnEnumDisplayDevices)(IN LPCSTR lpDevice, IN DWORD iDevNum, OUT PDISPLAY_DEVICEA lpDisplayDevice, IN DWORD dwFlags);
48	/ Display driver interface, XPDM - WDDM abstraction see VBOXDISPIF definitions above */
49	VBOXDISPIF dispIf;
50	} VBOXDISPLAYCONTEXT, *PVBOXDISPLAYCONTEXT;
51
52	static VBOXDISPLAYCONTEXT g_Ctx = { 0 };
53
54	#ifdef VBOX_WITH_WDDM
55	typedef enum
56	{
57	VBOXDISPLAY_DRIVER_TYPE_UNKNOWN = 0,
58	VBOXDISPLAY_DRIVER_TYPE_XPDM = 1,
59	VBOXDISPLAY_DRIVER_TYPE_WDDM = 2
60	} VBOXDISPLAY_DRIVER_TYPE;
61
62	static VBOXDISPLAY_DRIVER_TYPE getVBoxDisplayDriverType (VBOXDISPLAYCONTEXT *pCtx);
63	#endif
64
65	static DECLCALLBACK(int) VBoxDisplayInit(const PVBOXSERVICEENV pEnv, void **ppInstance)
66	{
67	LogFlowFuncEnter();
68
69	PVBOXDISPLAYCONTEXT pCtx = &g_Ctx; /** @todo r=andy Use instance data via service lookup (add void pInstance). /
70	AssertPtr(pCtx);
71
72	OSVERSIONINFO OSinfo; /** @todo r=andy Use VBoxTray's g_dwMajorVersion? */
73	OSinfo.dwOSVersionInfoSize = sizeof(OSinfo);
74	GetVersionEx (&OSinfo);
75
76	int rc;
77	HMODULE hUser = GetModuleHandle("user32.dll"); /** @todo r=andy Use RTLdrXXX and friends. */
78
79	pCtx->pEnv = pEnv;
80
81	if (NULL == hUser)
82	{
83	LogFlowFunc(("Could not get module handle of USER32.DLL!\n"));
84	rc = VERR_NOT_IMPLEMENTED;
85	}
86	else if (OSinfo.dwMajorVersion >= 5) /* APIs available only on W2K and up. */
87	{
88	/** @todo r=andy Use RTLdrXXX and friends. */
89	/** @todo r=andy No unicode version available? */
90	(uintptr_t )&pCtx->pfnChangeDisplaySettingsEx = (uintptr_t)GetProcAddress(hUser, "ChangeDisplaySettingsExA");
91	LogFlowFunc(("pfnChangeDisplaySettingsEx = %p\n", pCtx->pfnChangeDisplaySettingsEx));
92
93	(uintptr_t )&pCtx->pfnEnumDisplayDevices = (uintptr_t)GetProcAddress(hUser, "EnumDisplayDevicesA");
94	LogFlowFunc(("pfnEnumDisplayDevices = %p\n", pCtx->pfnEnumDisplayDevices));
95
96	#ifdef VBOX_WITH_WDDM
97	if (OSinfo.dwMajorVersion >= 6)
98	{
99	/* This is Vista and up, check if we need to switch the display driver if to WDDM mode. */
100	LogFlowFunc(("this is Windows Vista and up\n"));
101	VBOXDISPLAY_DRIVER_TYPE enmType = getVBoxDisplayDriverType(pCtx);
102	if (enmType == VBOXDISPLAY_DRIVER_TYPE_WDDM)
103	{
104	LogFlowFunc(("WDDM driver is installed, switching display driver if to WDDM mode\n"));
105	/* This is hacky, but the most easiest way. */
106	VBOXDISPIF_MODE enmMode = (OSinfo.dwMajorVersion > 6 \|\| OSinfo.dwMinorVersion > 0) ? VBOXDISPIF_MODE_WDDM_W7 : VBOXDISPIF_MODE_WDDM;
107	DWORD dwErr = VBoxDispIfSwitchMode(const_cast<PVBOXDISPIF>(&pEnv->dispIf), enmMode, NULL /* old mode, we don't care about it */);
108	if (dwErr == NO_ERROR)
109	{
110	LogFlowFunc(("DispIf successfully switched to WDDM mode\n"));
111	rc = VINF_SUCCESS;
112	}
113	else
114	{
115	LogFlowFunc(("Failed to switch DispIf to WDDM mode, error (%d)\n", dwErr));
116	rc = RTErrConvertFromWin32(dwErr);
117	}
118	}
119	else
120	rc = VINF_SUCCESS;
121	}
122	else
123	rc = VINF_SUCCESS;
124	#endif
125	}
126	else if (OSinfo.dwMajorVersion <= 4) /* Windows NT 4.0. */
127	{
128	/* Nothing to do here yet. */
129	/** @todo r=andy Has this been tested? */
130	rc = VINF_SUCCESS;
131	}
132	else /* Unsupported platform. */
133	{
134	LogFlowFunc(("Warning: Display for platform not handled yet!\n"));
135	rc = VERR_NOT_IMPLEMENTED;
136	}
137
138	if (RT_SUCCESS(rc))
139	{
140	VBOXDISPIFESCAPE_ISANYX IsAnyX = { 0 };
141	IsAnyX.EscapeHdr.escapeCode = VBOXESC_ISANYX;
142	DWORD err = VBoxDispIfEscapeInOut(&pEnv->dispIf, &IsAnyX.EscapeHdr, sizeof(uint32_t));
143	if (err == NO_ERROR)
144	pCtx->fAnyX = !!IsAnyX.u32IsAnyX;
145	else
146	pCtx->fAnyX = TRUE;
147
148	*ppInstance = pCtx;
149	}
150
151	LogFlowFuncLeaveRC(rc);
152	return rc;
153	}
154
155	static DECLCALLBACK(void) VBoxDisplayDestroy(void *pInstance)
156	{
157	return;
158	}
159
160	#ifdef VBOX_WITH_WDDM
161	static VBOXDISPLAY_DRIVER_TYPE getVBoxDisplayDriverType(PVBOXDISPLAYCONTEXT pCtx)
162	#else
163	static bool isVBoxDisplayDriverActive(PVBOXDISPLAYCONTEXT pCtx)
164	#endif
165	{
166	#ifdef VBOX_WITH_WDDM
167	VBOXDISPLAY_DRIVER_TYPE enmType = VBOXDISPLAY_DRIVER_TYPE_UNKNOWN;
168	#else
169	bool result = false;
170	#endif
171
172	if( pCtx->pfnEnumDisplayDevices )
173	{
174	INT devNum = 0;
175	DISPLAY_DEVICE dispDevice;
176	FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0);
177	dispDevice.cb = sizeof(DISPLAY_DEVICE);
178
179	LogFlowFunc(("isVBoxDisplayDriverActive: Checking for active VBox display driver (W2K+) ...\n"));
180
181	while (EnumDisplayDevices(NULL,
182	devNum,
183	&dispDevice,
184	0))
185	{
186	LogFlowFunc(("isVBoxDisplayDriverActive: DevNum:%d\nName:%s\nString:%s\nID:%s\nKey:%s\nFlags=%08X\n\n",
187	devNum,
188	&dispDevice.DeviceName[0],
189	&dispDevice.DeviceString[0],
190	&dispDevice.DeviceID[0],
191	&dispDevice.DeviceKey[0],
192	dispDevice.StateFlags));
193
194	if (dispDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
195	{
196	LogFlowFunc(("isVBoxDisplayDriverActive: Primary device\n"));
197
198	if (strcmp(&dispDevice.DeviceString[0], "VirtualBox Graphics Adapter") == 0)
199	#ifndef VBOX_WITH_WDDM
200	result = true;
201	#else
202	enmType = VBOXDISPLAY_DRIVER_TYPE_XPDM;
203	/* WDDM driver can now have multiple incarnations,
204	* if the driver name contains VirtualBox, and does NOT match the XPDM name,
205	* assume it to be WDDM */
206	else if (strstr(&dispDevice.DeviceString[0], "VirtualBox"))
207	enmType = VBOXDISPLAY_DRIVER_TYPE_WDDM;
208	#endif
209	break;
210	}
211
212	FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0);
213
214	dispDevice.cb = sizeof(DISPLAY_DEVICE);
215
216	devNum++;
217	}
218	}
219	else /* This must be NT 4 or something really old, so don't use EnumDisplayDevices() here ... */
220	{
221	LogFlowFunc(("isVBoxDisplayDriverActive: Checking for active VBox display driver (NT or older) ...\n"));
222
223	DEVMODE tempDevMode;
224	ZeroMemory (&tempDevMode, sizeof (tempDevMode));
225	tempDevMode.dmSize = sizeof(DEVMODE);
226	EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &tempDevMode); /* Get current display device settings */
227
228	/* Check for the short name, because all long stuff would be truncated */
229	if (strcmp((char*)&tempDevMode.dmDeviceName[0], "VBoxDisp") == 0)
230	#ifndef VBOX_WITH_WDDM
231	result = true;
232	#else
233	enmType = VBOXDISPLAY_DRIVER_TYPE_XPDM;
234	#endif
235	}
236
237	#ifndef VBOX_WITH_WDDM
238	return result;
239	#else
240	return enmType;
241	#endif
242	}
243
244	/** @todo r=andy The "display", "seamless" (and VBoxCaps facility in VBoxTray.cpp indirectly) is using this.
245	* Add a PVBOXDISPLAYCONTEXT here for properly getting the display (XPDM/WDDM) abstraction interfaces. */
246	DWORD EnableAndResizeDispDev(DEVMODE paDeviceModes, DISPLAY_DEVICE paDisplayDevices,
247	DWORD totalDispNum, UINT Id, DWORD aWidth, DWORD aHeight,
248	DWORD aBitsPerPixel, LONG aPosX, LONG aPosY, BOOL fEnabled, BOOL fExtDispSup)
249	{
250	DISPLAY_DEVICE displayDeviceTmp;
251	DISPLAY_DEVICE displayDevice;
252	DEVMODE deviceMode;
253	DWORD dwStatus = DISP_CHANGE_SUCCESSFUL;
254	DWORD iter ;
255
256	PVBOXDISPLAYCONTEXT pCtx = &g_Ctx; /* See todo above. */
257
258	deviceMode = paDeviceModes[Id];
259	displayDevice = paDisplayDevices[Id];
260
261	for (iter = 0; iter < totalDispNum; iter++)
262	{
263	if (iter != 0 && iter != Id && !(paDisplayDevices[iter].StateFlags & DISPLAY_DEVICE_ACTIVE))
264	{
265	LogRel(("Display: Initially disabling monitor with ID=%ld; total monitor count is %ld\n", iter, totalDispNum));
266	DEVMODE deviceModeTmp;
267	ZeroMemory(&deviceModeTmp, sizeof(DEVMODE));
268	deviceModeTmp.dmSize = sizeof(DEVMODE);
269	deviceModeTmp.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL \| DM_POSITION
270	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS ;
271	displayDeviceTmp = paDisplayDevices[iter];
272	pCtx->pfnChangeDisplaySettingsEx(displayDeviceTmp.DeviceName, &deviceModeTmp, NULL,
273	(CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
274	}
275	}
276
277	if (fExtDispSup) /* Extended Display Support possible*/
278	{
279	if (fEnabled)
280	{
281	/* Special case for enabling the secondary monitor. */
282	if(!(displayDevice.StateFlags & DISPLAY_DEVICE_ACTIVE))
283	{
284	LogRel(("Display [ID=%ld, name='%s']: Is a secondary monitor and disabled -- enabling it\n", Id, displayDevice.DeviceName));
285	deviceMode.dmPosition.x = paDeviceModes[0].dmPelsWidth;
286	deviceMode.dmPosition.y = 0;
287	deviceMode.dmBitsPerPel = 32;
288	OSVERSIONINFO OSinfo;
289	OSinfo.dwOSVersionInfoSize = sizeof (OSinfo);
290	GetVersionEx (&OSinfo);
291
292	if (OSinfo.dwMajorVersion < 6)
293	/* dont any more flags here as, only DM_POISITON is used to enable the secondary display */
294	deviceMode.dmFields = DM_POSITION;
295	else /* for win 7 and above */
296	/* for vista and above DM_BITSPERPEL is necessary */
297	deviceMode.dmFields = DM_BITSPERPEL \| DM_DISPLAYFLAGS \| DM_DISPLAYFREQUENCY \| DM_POSITION;
298
299	dwStatus = pCtx->pfnChangeDisplaySettingsEx((LPSTR)displayDevice.DeviceName,&deviceMode, NULL, (CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
300	/* A second call to ChangeDisplaySettings updates the monitor.*/
301	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
302	}
303	else /* secondary monitor already enabled. Request to change the resolution or position. */
304	{
305	if (aWidth !=0 && aHeight != 0)
306	{
307	LogRel(("Display [ID=%ld, name='%s']: Changing resolution to %ldx%ld\n", Id, displayDevice.DeviceName, aWidth, aHeight));
308	deviceMode.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL
309	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS;
310	deviceMode.dmPelsWidth = aWidth;
311	deviceMode.dmPelsHeight = aHeight;
312	deviceMode.dmBitsPerPel = aBitsPerPixel;
313	}
314	if (aPosX != 0 \|\| aPosY != 0)
315	{
316	LogRel(("Display [ID=%ld, name='%s']: Changing position to %ld,%ld\n", Id, displayDevice.DeviceName, aPosX, aPosY));
317	deviceMode.dmFields \|= DM_POSITION;
318	deviceMode.dmPosition.x = aPosX;
319	deviceMode.dmPosition.y = aPosY;
320	}
321	dwStatus = pCtx->pfnChangeDisplaySettingsEx((LPSTR)displayDevice.DeviceName,
322	&deviceMode, NULL, CDS_NORESET\|CDS_UPDATEREGISTRY, NULL);
323	/* A second call to ChangeDisplaySettings updates the monitor. */
324	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
325	}
326	}
327	else /* Request is there to disable the monitor with ID = Id*/
328	{
329	LogRel(("Display [ID=%ld, name='%s']: Disalbing\n", Id, displayDevice.DeviceName));
330
331	DEVMODE deviceModeTmp;
332	ZeroMemory(&deviceModeTmp, sizeof(DEVMODE));
333	deviceModeTmp.dmSize = sizeof(DEVMODE);
334	deviceModeTmp.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL \| DM_POSITION
335	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS ;
336	displayDeviceTmp = paDisplayDevices[Id];
337	dwStatus = pCtx->pfnChangeDisplaySettingsEx(displayDeviceTmp.DeviceName, &deviceModeTmp, NULL,
338	(CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
339	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
340	}
341	}
342	return dwStatus;
343	}
344
345	DWORD VBoxDisplayGetCount(void)
346	{
347	DISPLAY_DEVICE DisplayDevice;
348
349	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
350	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
351
352	/* Find out how many display devices the system has */
353	DWORD NumDevices = 0;
354	DWORD i = 0;
355	while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0))
356	{
357	LogFlowFunc(("ResizeDisplayDevice: [%d] %s\n", i, DisplayDevice.DeviceName));
358
359	if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
360	{
361	LogFlowFunc(("ResizeDisplayDevice: Found primary device. err %d\n", GetLastError ()));
362	NumDevices++;
363	}
364	else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER))
365	{
366
367	LogFlowFunc(("ResizeDisplayDevice: Found secondary device. err %d\n", GetLastError ()));
368	NumDevices++;
369	}
370
371	ZeroMemory(&DisplayDevice, sizeof(DisplayDevice));
372	DisplayDevice.cb = sizeof(DisplayDevice);
373	i++;
374	}
375
376	return NumDevices;
377	}
378
379	DWORD VBoxDisplayGetConfig(const DWORD NumDevices, DWORD pDevPrimaryNum, DWORD pNumDevices,
380	DISPLAY_DEVICE paDisplayDevices, DEVMODE paDeviceModes)
381	{
382	/* Fetch information about current devices and modes. */
383	DWORD DevNum = 0;
384	DWORD DevPrimaryNum = 0;
385
386	DISPLAY_DEVICE DisplayDevice;
387
388	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
389	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
390
391	DWORD i = 0;
392	while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0))
393	{
394	LogFlowFunc(("ResizeDisplayDevice: [%d(%d)] %s\n", i, DevNum, DisplayDevice.DeviceName));
395
396	BOOL bFetchDevice = FALSE;
397
398	if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
399	{
400	LogFlowFunc(("ResizeDisplayDevice: Found primary device. err %d\n", GetLastError ()));
401	DevPrimaryNum = DevNum;
402	bFetchDevice = TRUE;
403	}
404	else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER))
405	{
406
407	LogFlowFunc(("ResizeDisplayDevice: Found secondary device. err %d\n", GetLastError ()));
408	bFetchDevice = TRUE;
409	}
410
411	if (bFetchDevice)
412	{
413	if (DevNum >= NumDevices)
414	{
415	LogFlowFunc(("ResizeDisplayDevice: %d >= %d\n", NumDevices, DevNum));
416	return ERROR_BUFFER_OVERFLOW;
417	}
418
419	paDisplayDevices[DevNum] = DisplayDevice;
420
421	/* First try to get the video mode stored in registry (ENUM_REGISTRY_SETTINGS).
422	* A secondary display could be not active at the moment and would not have
423	* a current video mode (ENUM_CURRENT_SETTINGS).
424	*/
425	ZeroMemory(&paDeviceModes[DevNum], sizeof(DEVMODE));
426	paDeviceModes[DevNum].dmSize = sizeof(DEVMODE);
427	if (!EnumDisplaySettings((LPSTR)DisplayDevice.DeviceName,
428	ENUM_REGISTRY_SETTINGS, &paDeviceModes[DevNum]))
429	{
430	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings error %d\n", GetLastError ()));
431	}
432
433	if ( paDeviceModes[DevNum].dmPelsWidth == 0
434	\|\| paDeviceModes[DevNum].dmPelsHeight == 0)
435	{
436	/* No ENUM_REGISTRY_SETTINGS yet. Seen on Vista after installation.
437	* Get the current video mode then.
438	*/
439	ZeroMemory(&paDeviceModes[DevNum], sizeof(DEVMODE));
440	paDeviceModes[DevNum].dmSize = sizeof(DEVMODE);
441	if (!EnumDisplaySettings((LPSTR)DisplayDevice.DeviceName,
442	ENUM_CURRENT_SETTINGS, &paDeviceModes[DevNum]))
443	{
444	/* ENUM_CURRENT_SETTINGS returns FALSE when the display is not active:
445	* for example a disabled secondary display.
446	* Do not return here, ignore the error and set the display info to 0x0x0.
447	*/
448	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings(ENUM_CURRENT_SETTINGS) error %d\n", GetLastError ()));
449	}
450	}
451
452
453	DevNum++;
454	}
455
456	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
457	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
458	i++;
459	}
460
461	*pNumDevices = DevNum;
462	*pDevPrimaryNum = DevPrimaryNum;
463
464	return NO_ERROR;
465	}
466
467	/* Returns TRUE to try again. */
468	/** @todo r=andy Why not using the VMMDevDisplayChangeRequestEx structure for all those parameters here? */
469	static BOOL ResizeDisplayDevice(PVBOXDISPLAYCONTEXT pCtx,
470	UINT Id, DWORD Width, DWORD Height, DWORD BitsPerPixel,
471	BOOL fEnabled, LONG dwNewPosX, LONG dwNewPosY, bool fChangeOrigin,
472	BOOL fExtDispSup)
473	{
474	BOOL fDispAlreadyEnabled = false; /* check whether the monitor with ID is already enabled. */
475	BOOL fModeReset = (Width == 0 && Height == 0 && BitsPerPixel == 0 &&
476	dwNewPosX == 0 && dwNewPosY == 0 && !fChangeOrigin);
477	DWORD dmFields = 0;
478
479	LogFlowFunc(("[%d] %dx%d at %d,%d fChangeOrigin %d fEnabled %d fExtDisSup %d\n",
480	Id, Width, Height, dwNewPosX, dwNewPosY, fChangeOrigin, fEnabled, fExtDispSup));
481
482	if (!pCtx->fAnyX)
483	Width &= 0xFFF8;
484
485	VBoxDispIfCancelPendingResize(&pCtx->pEnv->dispIf);
486
487	DWORD NumDevices = VBoxDisplayGetCount();
488
489	if (NumDevices == 0 \|\| Id >= NumDevices)
490	{
491	LogFlowFunc(("ResizeDisplayDevice: Requested identifier %d is invalid. err %d\n", Id, GetLastError ()));
492	return FALSE;
493	}
494
495	LogFlowFunc(("ResizeDisplayDevice: Found total %d devices. err %d\n", NumDevices, GetLastError ()));
496
497	DISPLAY_DEVICE paDisplayDevices = (DISPLAY_DEVICE )alloca (sizeof (DISPLAY_DEVICE) * NumDevices);
498	DEVMODE paDeviceModes = (DEVMODE )alloca (sizeof (DEVMODE) * NumDevices);
499	RECTL paRects = (RECTL )alloca (sizeof (RECTL) * NumDevices);
500	DWORD DevNum = 0;
501	DWORD DevPrimaryNum = 0;
502	DWORD dwStatus = VBoxDisplayGetConfig(NumDevices, &DevPrimaryNum, &DevNum, paDisplayDevices, paDeviceModes);
503	if (dwStatus != NO_ERROR)
504	{
505	LogFlowFunc(("ResizeDisplayDevice: VBoxGetDisplayConfig failed, %d\n", dwStatus));
506	return dwStatus;
507	}
508
509	if (NumDevices != DevNum)
510	LogFlowFunc(("ResizeDisplayDevice: NumDevices(%d) != DevNum(%d)\n", NumDevices, DevNum));
511
512	DWORD i = 0;
513
514	for (i = 0; i < DevNum; ++i)
515	{
516	if (fExtDispSup)
517	{
518	LogRel(("Extended Display Support.\n"));
519	LogFlowFunc(("[%d] %dx%dx%d at %d,%d, dmFields 0x%x\n",
520	i,
521	paDeviceModes[i].dmPelsWidth,
522	paDeviceModes[i].dmPelsHeight,
523	paDeviceModes[i].dmBitsPerPel,
524	paDeviceModes[i].dmPosition.x,
525	paDeviceModes[i].dmPosition.y,
526	paDeviceModes[i].dmFields));
527	}
528	else
529	{
530	LogRel(("NO Ext Display Support \n"));
531	}
532
533	paRects[i].left = paDeviceModes[i].dmPosition.x;
534	paRects[i].top = paDeviceModes[i].dmPosition.y;
535	paRects[i].right = paDeviceModes[i].dmPosition.x + paDeviceModes[i].dmPelsWidth;
536	paRects[i].bottom = paDeviceModes[i].dmPosition.y + paDeviceModes[i].dmPelsHeight;
537	}
538
539	/* Keep a record if the display with ID is already active or not. */
540	if (paDisplayDevices[Id].StateFlags & DISPLAY_DEVICE_ACTIVE)
541	{
542	LogRel(("Display with ID=%d already enabled\n", Id));
543	fDispAlreadyEnabled = TRUE;
544	}
545
546	/* Width, height equal to 0 means that this value must be not changed.
547	* Update input parameters if necessary.
548	* Note: BitsPerPixel is taken into account later, when new rectangles
549	* are assigned to displays.
550	*/
551	if (Width == 0)
552	Width = paRects[Id].right - paRects[Id].left;
553	else
554	dmFields \|= DM_PELSWIDTH;
555
556	if (Height == 0)
557	Height = paRects[Id].bottom - paRects[Id].top;
558	else
559	dmFields \|= DM_PELSHEIGHT;
560
561	if (BitsPerPixel == 0)
562	BitsPerPixel = paDeviceModes[Id].dmBitsPerPel;
563	else
564	dmFields \|= DM_BITSPERPEL;
565
566	if (!fChangeOrigin)
567	{
568	/* Use existing position. */
569	dwNewPosX = paRects[Id].left;
570	dwNewPosY = paRects[Id].top;
571	LogFlowFunc(("existing dwNewPosX %d, dwNewPosY %d\n", dwNewPosX, dwNewPosY));
572	}
573
574	/* Always update the position.
575	* It is either explicitly requested or must be set to the existing position.
576	*/
577	dmFields \|= DM_POSITION;
578
579	/* Check whether a mode reset or a change is requested.
580	* Rectangle position is recalculated only if fEnabled is 1.
581	* For non extended supported modes (old Host VMs), fEnabled
582	* is always 1.
583	*/
584	/* Handled the case where previouseresolution of secondary monitor
585	* was for eg. 102476832 and monitor was in disabled state.
586	* User gives the command
587	* setvideomode 1024 768 32 1 yes.
588	* Now in this case the resolution request is same as previous one but
589	* monitor is going from disabled to enabled state so the below condition
590	* shour return false
591	* The below condition will only return true , if no mode reset has
592	* been requested AND fEnabled is 1 and fDispAlreadyEnabled is also 1 AND
593	* all rect conditions are true. Thus in this case nothing has to be done.
594	*/
595	if ( !fModeReset && (!fEnabled == !fDispAlreadyEnabled)
596	&& paRects[Id].left == dwNewPosX
597	&& paRects[Id].top == dwNewPosY
598	&& paRects[Id].right - paRects[Id].left == Width
599	&& paRects[Id].bottom - paRects[Id].top == Height
600	&& paDeviceModes[Id].dmBitsPerPel == BitsPerPixel)
601	{
602	LogRel(("Already at desired resolution. No Change.\n"));
603	return FALSE;
604	}
605
606	hlpResizeRect(paRects, NumDevices, DevPrimaryNum, Id,
607	fEnabled ? Width : 0, fEnabled ? Height : 0, dwNewPosX, dwNewPosY);
608	#ifdef Log
609	for (i = 0; i < NumDevices; i++)
610	{
611	LogFlowFunc(("ResizeDisplayDevice: [%d]: %d,%d %dx%d\n",
612	i, paRects[i].left, paRects[i].top,
613	paRects[i].right - paRects[i].left,
614	paRects[i].bottom - paRects[i].top));
615	}
616	#endif /* Log */
617
618	#ifdef VBOX_WITH_WDDM
619	VBOXDISPLAY_DRIVER_TYPE enmDriverType = getVBoxDisplayDriverType (pCtx);
620	if (enmDriverType == VBOXDISPLAY_DRIVER_TYPE_WDDM)
621	{
622	/* Assign the new rectangles to displays. */
623	for (i = 0; i < NumDevices; i++)
624	{
625	paDeviceModes[i].dmPosition.x = paRects[i].left;
626	paDeviceModes[i].dmPosition.y = paRects[i].top;
627	paDeviceModes[i].dmPelsWidth = paRects[i].right - paRects[i].left;
628	paDeviceModes[i].dmPelsHeight = paRects[i].bottom - paRects[i].top;
629
630	if (i == Id)
631	paDeviceModes[i].dmBitsPerPel = BitsPerPixel;
632
633	paDeviceModes[i].dmFields \|= dmFields;
634
635	/* On Vista one must specify DM_BITSPERPEL.
636	* Note that the current mode dmBitsPerPel is already in the DEVMODE structure.
637	*/
638	if (!(paDeviceModes[i].dmFields & DM_BITSPERPEL))
639	{
640	LogFlowFunc(("no DM_BITSPERPEL\n"));
641	paDeviceModes[i].dmFields \|= DM_BITSPERPEL;
642	paDeviceModes[i].dmBitsPerPel = 32;
643	}
644
645	LogFlowFunc(("ResizeDisplayDevice: pfnChangeDisplaySettingsEx %x: %dx%dx%d at %d,%d fields 0x%X\n",
646	pCtx->pfnChangeDisplaySettingsEx,
647	paDeviceModes[i].dmPelsWidth,
648	paDeviceModes[i].dmPelsHeight,
649	paDeviceModes[i].dmBitsPerPel,
650	paDeviceModes[i].dmPosition.x,
651	paDeviceModes[i].dmPosition.y,
652	paDeviceModes[i].dmFields));
653	}
654
655	LogFlowFunc(("Request to resize the displa\n"));
656	DWORD err = VBoxDispIfResizeModes(&pCtx->pEnv->dispIf, Id, fEnabled, fExtDispSup, paDisplayDevices, paDeviceModes, DevNum);
657	if (err != ERROR_RETRY)
658	{
659	if (err == NO_ERROR)
660	LogFlowFunc(("VBoxDispIfResizeModes succeeded\n"));
661	else
662	LogFlowFunc(("Failure VBoxDispIfResizeModes (%d)\n", err));
663	return FALSE;
664	}
665
666	LogFlowFunc(("ResizeDisplayDevice: RETRY requested\n"));
667	return TRUE;
668	}
669	#endif
670	/* Without this, Windows will not ask the miniport for its
671	* mode table but uses an internal cache instead.
672	*/
673	for (i = 0; i < NumDevices; i++)
674	{
675	DEVMODE tempDevMode;
676	ZeroMemory (&tempDevMode, sizeof (tempDevMode));
677	tempDevMode.dmSize = sizeof(DEVMODE);
678	EnumDisplaySettings((LPSTR)paDisplayDevices[i].DeviceName, 0xffffff, &tempDevMode);
679	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings last error %d\n", GetLastError ()));
680	}
681
682	/* Assign the new rectangles to displays. */
683	for (i = 0; i < NumDevices; i++)
684	{
685	paDeviceModes[i].dmPosition.x = paRects[i].left;
686	paDeviceModes[i].dmPosition.y = paRects[i].top;
687	paDeviceModes[i].dmPelsWidth = paRects[i].right - paRects[i].left;
688	paDeviceModes[i].dmPelsHeight = paRects[i].bottom - paRects[i].top;
689
690	/* On Vista one must specify DM_BITSPERPEL.
691	* Note that the current mode dmBitsPerPel is already in the DEVMODE structure.
692	*/
693	paDeviceModes[i].dmFields = DM_POSITION \| DM_PELSHEIGHT \| DM_PELSWIDTH \| DM_BITSPERPEL;
694
695	if ( i == Id
696	&& BitsPerPixel != 0)
697	{
698	/* Change dmBitsPerPel if requested. */
699	paDeviceModes[i].dmBitsPerPel = BitsPerPixel;
700	}
701
702	LogFlowFunc(("ResizeDisplayDevice: pfnChangeDisplaySettingsEx Current MonitorId=%d: %dx%dx%d at %d,%d\n",
703	i,
704	paDeviceModes[i].dmPelsWidth,
705	paDeviceModes[i].dmPelsHeight,
706	paDeviceModes[i].dmBitsPerPel,
707	paDeviceModes[i].dmPosition.x,
708	paDeviceModes[i].dmPosition.y));
709
710	LONG status = pCtx->pfnChangeDisplaySettingsEx((LPSTR)paDisplayDevices[i].DeviceName,
711	&paDeviceModes[i], NULL, CDS_NORESET \| CDS_UPDATEREGISTRY, NULL);
712	LogFlowFunc(("ResizeDisplayDevice: ChangeDisplaySettingsEx position status %d, err %d\n", status, GetLastError ()));
713	}
714
715	LogFlowFunc(("Enable And Resize Device. Id = %d, Width=%d Height=%d, \
716	dwNewPosX = %d, dwNewPosY = %d fEnabled=%d & fExtDispSupport = %d \n",
717	Id, Width, Height, dwNewPosX, dwNewPosY, fEnabled, fExtDispSup));
718	dwStatus = EnableAndResizeDispDev(paDeviceModes, paDisplayDevices, DevNum, Id, Width, Height, BitsPerPixel,
719	dwNewPosX, dwNewPosY, fEnabled, fExtDispSup);
720	if (dwStatus == DISP_CHANGE_SUCCESSFUL \|\| dwStatus == DISP_CHANGE_BADMODE)
721	{
722	/* Successfully set new video mode or our driver can not set
723	* the requested mode. Stop trying.
724	*/
725	return FALSE;
726	}
727	/* Retry the request. */
728	return TRUE;
729	}
730
731	/**
732	* Thread function to wait for and process display change
733	* requests
734	*/
735	DECLCALLBACK(int) VBoxDisplayWorker(void pInstance, bool volatile pfShutdown)
736	{
737	AssertPtr(pInstance);
738	LogFlowFunc(("pInstance=%p\n", pInstance));
739
740	/*
741	* Tell the control thread that it can continue
742	* spawning services.
743	*/
744	RTThreadUserSignal(RTThreadSelf());
745
746	PVBOXDISPLAYCONTEXT pCtx = (PVBOXDISPLAYCONTEXT)pInstance;
747
748	HANDLE gVBoxDriver = pCtx->pEnv->hDriver;
749	VBoxGuestFilterMaskInfo maskInfo;
750	DWORD cbReturned;
751
752	maskInfo.u32OrMask = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED;
753	maskInfo.u32NotMask = 0;
754	if (!DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
755	{
756	DWORD dwErr = GetLastError();
757	LogFlowFunc(("DeviceIOControl(CtlMask - or) failed with %ld, exiting\n", dwErr));
758	return RTErrConvertFromWin32(dwErr);
759	}
760
761	PostMessage(g_hwndToolWindow, WM_VBOX_GRAPHICS_SUPPORTED, 0, 0);
762
763	VBoxDispIfResizeStarted(&pCtx->pEnv->dispIf);
764
765	int rc = VINF_SUCCESS;
766
767	for (;;)
768	{
769	BOOL fExtDispSup = TRUE;
770	/* Wait for a display change event. */
771	VBoxGuestWaitEventInfo waitEvent;
772	waitEvent.u32TimeoutIn = 1000;
773	waitEvent.u32EventMaskIn = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED;
774	if (DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_WAITEVENT, &waitEvent, sizeof(waitEvent), &waitEvent, sizeof(waitEvent), &cbReturned, NULL))
775	{
776	/LogFlowFunc(("DeviceIOControl succeeded\n"));/
777
778	if (NULL == pCtx) {
779	LogFlowFunc(("Invalid context detected!\n"));
780	break;
781	}
782
783	if (NULL == pCtx->pEnv) {
784	LogFlowFunc(("Invalid context environment detected!\n"));
785	break;
786	}
787
788	/* are we supposed to stop? */
789	if (*pfShutdown)
790	break;
791
792	/LogFlowFunc(("checking event\n"));/
793
794	/* did we get the right event? */
795	if (waitEvent.u32EventFlagsOut & VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST)
796	{
797	LogFlowFunc(("going to get display change information\n"));
798	BOOL fDisplayChangeQueried;
799
800
801	/* We got at least one event. Read the requested resolution
802	* and try to set it until success. New events will not be seen
803	* but a new resolution will be read in this poll loop.
804	*/
805	/* Try if extended mode display information is available from the host. */
806	VMMDevDisplayChangeRequestEx displayChangeRequest = {0};
807	fExtDispSup = TRUE;
808	displayChangeRequest.header.size = sizeof(VMMDevDisplayChangeRequestEx);
809	displayChangeRequest.header.version = VMMDEV_REQUEST_HEADER_VERSION;
810	displayChangeRequest.header.requestType = VMMDevReq_GetDisplayChangeRequestEx;
811	displayChangeRequest.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
812	fDisplayChangeQueried = DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_VMMREQUEST(sizeof(VMMDevDisplayChangeRequestEx)), &displayChangeRequest, sizeof(VMMDevDisplayChangeRequestEx),
813	&displayChangeRequest, sizeof(VMMDevDisplayChangeRequestEx), &cbReturned, NULL);
814
815	if (!fDisplayChangeQueried)
816	{
817	LogFlowFunc(("Extended Display Not Supported. Trying VMMDevDisplayChangeRequest2\n"));
818	fExtDispSup = FALSE; /* Extended display Change request is not supported */
819
820	displayChangeRequest.header.size = sizeof(VMMDevDisplayChangeRequest2);
821	displayChangeRequest.header.version = VMMDEV_REQUEST_HEADER_VERSION;
822	displayChangeRequest.header.requestType = VMMDevReq_GetDisplayChangeRequest2;
823	displayChangeRequest.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
824	fDisplayChangeQueried = DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_VMMREQUEST(sizeof(VMMDevDisplayChangeRequest2)), &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest2),
825	&displayChangeRequest, sizeof(VMMDevDisplayChangeRequest2), &cbReturned, NULL);
826	displayChangeRequest.cxOrigin = 0;
827	displayChangeRequest.cyOrigin = 0;
828	displayChangeRequest.fChangeOrigin = 0;
829	displayChangeRequest.fEnabled = 1; /* Always Enabled for old VMs on Host.*/
830	}
831
832	if (!fDisplayChangeQueried)
833	{
834	LogFlowFunc(("Extended Display Not Supported. Trying VMMDevDisplayChangeRequest\n"));
835	fExtDispSup = FALSE; /Extended display Change request is not supported /
836	/* Try the old version of the request for old VBox hosts. */
837	displayChangeRequest.header.size = sizeof(VMMDevDisplayChangeRequest);
838	displayChangeRequest.header.version = VMMDEV_REQUEST_HEADER_VERSION;
839	displayChangeRequest.header.requestType = VMMDevReq_GetDisplayChangeRequest;
840	displayChangeRequest.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST;
841	fDisplayChangeQueried = DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_VMMREQUEST(sizeof(VMMDevDisplayChangeRequest)), &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest),
842	&displayChangeRequest, sizeof(VMMDevDisplayChangeRequest), &cbReturned, NULL);
843	displayChangeRequest.display = 0;
844	displayChangeRequest.cxOrigin = 0;
845	displayChangeRequest.cyOrigin = 0;
846	displayChangeRequest.fChangeOrigin = 0;
847	displayChangeRequest.fEnabled = 1; /* Always Enabled for old VMs on Host.*/
848	}
849
850	if (fDisplayChangeQueried)
851	{
852	/* Try to set the requested video mode. Repeat until it is successful or is rejected by the driver. */
853	for (;;)
854	{
855	LogFlowFunc(("VMMDevReq_GetDisplayChangeRequest2: %dx%dx%d at %d\n", displayChangeRequest.xres, displayChangeRequest.yres, displayChangeRequest.bpp, displayChangeRequest.display));
856
857	/*
858	* Only try to change video mode if the active display driver is VBox additions.
859	*/
860	#ifdef VBOX_WITH_WDDM
861	VBOXDISPLAY_DRIVER_TYPE enmDriverType = getVBoxDisplayDriverType (pCtx);
862
863	if (enmDriverType == VBOXDISPLAY_DRIVER_TYPE_WDDM)
864	LogFlowFunc(("Detected WDDM Driver\n"));
865
866	if (enmDriverType != VBOXDISPLAY_DRIVER_TYPE_UNKNOWN)
867	#else
868	if (isVBoxDisplayDriverActive (pCtx))
869	#endif
870	{
871	LogFlowFunc(("Display driver is active!\n"));
872
873	if (pCtx->pfnChangeDisplaySettingsEx != 0)
874	{
875	LogFlowFunc(("Detected W2K or later\n"));
876	/* W2K or later. */
877	LogFlowFunc(("DisplayChangeReqEx parameters aDisplay=%d x xRes=%d x yRes=%d x bpp=%d x SecondayMonEnb=%d x NewOriginX=%d x NewOriginY=%d x ChangeOrigin=%d\n",
878	displayChangeRequest.display,
879	displayChangeRequest.xres,
880	displayChangeRequest.yres,
881	displayChangeRequest.bpp,
882	displayChangeRequest.fEnabled,
883	displayChangeRequest.cxOrigin,
884	displayChangeRequest.cyOrigin,
885	displayChangeRequest.fChangeOrigin));
886	if (!ResizeDisplayDevice(pCtx,
887	displayChangeRequest.display,
888	displayChangeRequest.xres,
889	displayChangeRequest.yres,
890	displayChangeRequest.bpp,
891	displayChangeRequest.fEnabled,
892	displayChangeRequest.cxOrigin,
893	displayChangeRequest.cyOrigin,
894	displayChangeRequest.fChangeOrigin,
895	fExtDispSup
896	))
897	{
898	LogFlowFunc(("ResizeDipspalyDevice return 0\n"));
899	break;
900	}
901
902	}
903	else
904	{
905	LogFlowFunc(("Detected NT\n"));
906
907	/* Single monitor NT. */
908	DEVMODE devMode;
909	RT_ZERO(devMode);
910	devMode.dmSize = sizeof(DEVMODE);
911
912	/* get the current screen setup */
913	if (EnumDisplaySettings(NULL, ENUM_REGISTRY_SETTINGS, &devMode))
914	{
915	LogFlowFunc(("Current mode: %d x %d x %d at %d,%d\n",
916	devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel, devMode.dmPosition.x, devMode.dmPosition.y));
917
918	/* Check whether a mode reset or a change is requested. */
919	if (displayChangeRequest.xres \|\| displayChangeRequest.yres \|\| displayChangeRequest.bpp)
920	{
921	/* A change is requested.
922	* Set values which are not to be changed to the current values.
923	*/
924	if (!displayChangeRequest.xres)
925	displayChangeRequest.xres = devMode.dmPelsWidth;
926	if (!displayChangeRequest.yres)
927	displayChangeRequest.yres = devMode.dmPelsHeight;
928	if (!displayChangeRequest.bpp)
929	displayChangeRequest.bpp = devMode.dmBitsPerPel;
930	}
931	else
932	{
933	/* All zero values means a forced mode reset. Do nothing. */
934	LogFlowFunc(("Forced mode reset\n"));
935	}
936
937	/* Verify that the mode is indeed changed. */
938	if ( devMode.dmPelsWidth == displayChangeRequest.xres
939	&& devMode.dmPelsHeight == displayChangeRequest.yres
940	&& devMode.dmBitsPerPel == displayChangeRequest.bpp)
941	{
942	LogFlowFunc(("already at desired resolution\n"));
943	break;
944	}
945
946	// without this, Windows will not ask the miniport for its
947	// mode table but uses an internal cache instead
948	DEVMODE tempDevMode = {0};
949	tempDevMode.dmSize = sizeof(DEVMODE);
950	EnumDisplaySettings(NULL, 0xffffff, &tempDevMode);
951
952	/* adjust the values that are supposed to change */
953	if (displayChangeRequest.xres)
954	devMode.dmPelsWidth = displayChangeRequest.xres;
955	if (displayChangeRequest.yres)
956	devMode.dmPelsHeight = displayChangeRequest.yres;
957	if (displayChangeRequest.bpp)
958	devMode.dmBitsPerPel = displayChangeRequest.bpp;
959
960	LogFlowFunc(("setting new mode %d x %d, %d BPP\n",
961	devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel));
962
963	/* set the new mode */
964	LONG status = ChangeDisplaySettings(&devMode, CDS_UPDATEREGISTRY);
965	if (status != DISP_CHANGE_SUCCESSFUL)
966	{
967	LogFlowFunc(("error from ChangeDisplaySettings: %d\n", status));
968
969	if (status == DISP_CHANGE_BADMODE)
970	{
971	/* Our driver can not set the requested mode. Stop trying. */
972	break;
973	}
974	}
975	else
976	{
977	/* Successfully set new video mode. */
978	break;
979	}
980	}
981	else
982	{
983	LogFlowFunc(("error from EnumDisplaySettings: %d\n", GetLastError ()));
984	break;
985	}
986	}
987	}
988	else
989	{
990	LogFlowFunc(("vboxDisplayDriver is not active\n"));
991	}
992
993	/* Retry the change a bit later. */
994	RTThreadSleep(1000);
995	}
996	}
997	else
998	{
999	/* sleep a bit to not eat too much CPU while retrying */
1000	RTThreadSleep(50);
1001	}
1002	}
1003
1004	/* are we supposed to stop? */
1005	if (*pfShutdown)
1006	break;
1007
1008	if (waitEvent.u32EventFlagsOut & VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED)
1009	hlpReloadCursor();
1010	}
1011	else
1012	{
1013	// Checking once a second whether or not WM_DISPLAYCHANGED happened.
1014	if (ASMAtomicXchgU32(&g_fGuestDisplaysChanged, 0))
1015	{
1016	// XPDM driver has VBoxDispDrvNotify to receive such a notifications
1017	if (pCtx->pEnv->dispIf.enmMode >= VBOXDISPIF_MODE_WDDM)
1018	{
1019	VBOXDISPIFESCAPE EscapeHdr = { 0 };
1020	EscapeHdr.escapeCode = VBOXESC_GUEST_DISPLAYCHANGED;
1021
1022	DWORD err = VBoxDispIfEscapeInOut(&pCtx->pEnv->dispIf, &EscapeHdr, 0);
1023	LogFlowFunc(("VBoxDispIfEscapeInOut returned %d\n", err));
1024	}
1025	}
1026	/* sleep a bit to not eat too much CPU in case the above call always fails */
1027	RTThreadSleep(10);
1028
1029	if (*pfShutdown)
1030	break;
1031	}
1032	}
1033
1034	/*
1035	* Remove event filter and graphics capability report.
1036	*/
1037	maskInfo.u32OrMask = 0;
1038	maskInfo.u32NotMask = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED;
1039	if (!DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
1040	LogFlowFunc(("DeviceIOControl(CtlMask - not) failed\n"));
1041	PostMessage(g_hwndToolWindow, WM_VBOX_GRAPHICS_UNSUPPORTED, 0, 0);
1042
1043	LogFlowFuncLeaveRC(rc);
1044	return rc;
1045	}
1046
1047	/**
1048	* The service description.
1049	*/
1050	VBOXSERVICEDESC g_SvcDescDisplay =
1051	{
1052	/* pszName. */
1053	"display",
1054	/* pszDescription. */
1055	"Display Notifications",
1056	/* methods */
1057	VBoxDisplayInit,
1058	VBoxDisplayWorker,
1059	NULL /* pfnStop */,
1060	VBoxDisplayDestroy
1061	};
1062

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxDisplay.cpp@ 62865

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