VBoxSeamless.cpp@ 45137

Last change on this file since 45137 was 45137, checked in by vboxsync, 12 years ago
VBoxTray: fix visible regions for Aero
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1	/* $Id: VBoxSeamless.cpp 45137 2013-03-22 10:52:19Z vboxsync $ */
2	/** @file
3	* VBoxSeamless - Seamless windows
4	*/
5
6	/*
7	* Copyright (C) 2006-2012 Oracle Corporation
8	*
9	* This file is part of VirtualBox Open Source Edition (OSE), as
10	* available from http://www.215389.xyz. 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
18	#define _WIN32_WINNT 0x0500
19	#include <Windows.h>
20	#include "VBoxTray.h"
21	#include "VBoxHelpers.h"
22	#include "VBoxSeamless.h"
23	#include <VBoxHook.h>
24	#include <VBoxDisplay.h>
25	#include <VBox/VMMDev.h>
26	#include <iprt/assert.h>
27	#include <VBoxGuestInternal.h>
28
29	typedef struct _VBOXSEAMLESSCONTEXT
30	{
31	const VBOXSERVICEENV *pEnv;
32
33	HMODULE hModule;
34
35	BOOL (* pfnVBoxInstallHook)(HMODULE hDll);
36	BOOL (* pfnVBoxRemoveHook)();
37
38	PVBOXDISPIFESCAPE lpEscapeData;
39	} VBOXSEAMLESSCONTEXT;
40
41	typedef struct
42	{
43	HDC hdc;
44	HRGN hrgn;
45	} VBOX_ENUM_PARAM, *PVBOX_ENUM_PARAM;
46
47	static VBOXSEAMLESSCONTEXT gCtx = {0};
48
49	void VBoxLogString(HANDLE hDriver, char *pszStr);
50
51	int VBoxSeamlessInit(const VBOXSERVICEENV pEnv, void ppInstance, bool pfStartThread)
52	{
53	Log(("VBoxTray: VBoxSeamlessInit\n"));
54
55	*pfStartThread = false;
56	gCtx.pEnv = pEnv;
57
58	OSVERSIONINFO OSinfo;
59	OSinfo.dwOSVersionInfoSize = sizeof (OSinfo);
60	GetVersionEx (&OSinfo);
61
62	int rc = VINF_SUCCESS;
63
64	/* We have to jump out here when using NT4, otherwise it complains about
65	a missing API function "UnhookWinEvent" used by the dynamically loaded VBoxHook.dll below */
66	if (OSinfo.dwMajorVersion <= 4) /* Windows NT 4.0 or older */
67	{
68	Log(("VBoxTray: VBoxSeamlessInit: Windows NT 4.0 or older not supported!\n"));
69	rc = VERR_NOT_SUPPORTED;
70	}
71	else
72	{
73	/* Will fail if SetWinEventHook is not present (version < NT4 SP6 apparently) */
74	gCtx.hModule = LoadLibrary(VBOXHOOK_DLL_NAME);
75	if (gCtx.hModule)
76	{
77	(uintptr_t )&gCtx.pfnVBoxInstallHook = (uintptr_t)GetProcAddress(gCtx.hModule, "VBoxInstallHook");
78	(uintptr_t )&gCtx.pfnVBoxRemoveHook = (uintptr_t)GetProcAddress(gCtx.hModule, "VBoxRemoveHook");
79
80	/* Inform the host that we support the seamless window mode. */
81	rc = VbglR3SetGuestCaps(VMMDEV_GUEST_SUPPORTS_SEAMLESS, 0);
82	if (RT_SUCCESS(rc))
83	{
84	*pfStartThread = true;
85	*ppInstance = &gCtx;
86	}
87	else
88	Log(("VBoxTray: VBoxSeamlessInit: Failed to set seamless capability\n"));
89	}
90	else
91	{
92	rc = RTErrConvertFromWin32(GetLastError());
93	Log(("VBoxTray: VBoxSeamlessInit: LoadLibrary of \"%s\" failed with rc=%Rrc\n", VBOXHOOK_DLL_NAME, rc));
94	}
95	}
96
97	return rc;
98	}
99
100
101	void VBoxSeamlessDestroy(const VBOXSERVICEENV pEnv, void pInstance)
102	{
103	Log(("VBoxTray: VBoxSeamlessDestroy\n"));
104
105	/* Inform the host that we no longer support the seamless window mode. */
106	int rc = VbglR3SetGuestCaps(0, VMMDEV_GUEST_SUPPORTS_SEAMLESS);
107	if (RT_FAILURE(rc))
108	Log(("VBoxTray: VBoxSeamlessDestroy: Failed to unset seamless capability, rc=%Rrc\n", rc));
109
110	if (gCtx.pfnVBoxRemoveHook)
111	gCtx.pfnVBoxRemoveHook();
112	if (gCtx.hModule)
113	FreeLibrary(gCtx.hModule);
114	gCtx.hModule = 0;
115	return;
116	}
117
118	void VBoxSeamlessInstallHook()
119	{
120	if (gCtx.pfnVBoxInstallHook)
121	{
122	/* Check current visible region state */
123	VBoxSeamlessCheckWindows();
124
125	gCtx.pfnVBoxInstallHook(gCtx.hModule);
126	}
127	}
128
129	void VBoxSeamlessRemoveHook()
130	{
131	if (gCtx.pfnVBoxRemoveHook)
132	gCtx.pfnVBoxRemoveHook();
133
134	if (gCtx.lpEscapeData)
135	{
136	free(gCtx.lpEscapeData);
137	gCtx.lpEscapeData = NULL;
138	}
139	}
140
141	BOOL CALLBACK VBoxEnumFunc(HWND hwnd, LPARAM lParam)
142	{
143	PVBOX_ENUM_PARAM lpParam = (PVBOX_ENUM_PARAM)lParam;
144	DWORD dwStyle, dwExStyle;
145	RECT rectWindow, rectVisible;
146
147	dwStyle = GetWindowLong(hwnd, GWL_STYLE);
148	dwExStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
149	if ( !(dwStyle & WS_VISIBLE)
150	\|\| (dwStyle & WS_CHILD))
151	return TRUE;
152
153	Log(("VBoxTray: VBoxEnumFunc %x\n", hwnd));
154	/* Only visible windows that are present on the desktop are interesting here */
155	if (GetWindowRect(hwnd, &rectWindow))
156	{
157	rectVisible = rectWindow;
158
159	char szWindowText[256];
160	szWindowText[0] = 0;
161	GetWindowText(hwnd, szWindowText, sizeof(szWindowText));
162
163	DWORD pid = 0;
164	DWORD tid = GetWindowThreadProcessId(hwnd, &pid);
165
166	/* Filter out Windows XP shadow windows */
167	/** @todo still shows inside the guest */
168	if ( szWindowText[0] == 0
169	&& (
170	(dwStyle == (WS_POPUP\|WS_VISIBLE\|WS_CLIPSIBLINGS)
171	&& dwExStyle == (WS_EX_LAYERED\|WS_EX_TOOLWINDOW\|WS_EX_TRANSPARENT\|WS_EX_TOPMOST))
172	\|\| (dwStyle == (WS_POPUP\|WS_VISIBLE\|WS_DISABLED\|WS_CLIPSIBLINGS\|WS_CLIPCHILDREN)
173	&& dwExStyle == (WS_EX_TOOLWINDOW \| WS_EX_TRANSPARENT \| WS_EX_LAYERED \| WS_EX_NOACTIVATE))
174	\|\| (dwStyle == (WS_POPUP\|WS_VISIBLE\|WS_CLIPSIBLINGS\|WS_CLIPCHILDREN)
175	&& dwExStyle == (WS_EX_TOOLWINDOW))
176	))
177	{
178	Log(("VBoxTray: Filter out shadow window style=%x exstyle=%x\n", dwStyle, dwExStyle));
179	Log(("VBoxTray: Enum hwnd=%x rect (%d,%d) (%d,%d) (filtered)\n", hwnd, rectWindow.left, rectWindow.top, rectWindow.right, rectWindow.bottom));
180	Log(("VBoxTray: title=%s style=%x exStyle=%x\n", szWindowText, dwStyle, dwExStyle));
181	Log(("VBoxTray: pid=%d tid=%d\n", pid, tid));
182	return TRUE;
183	}
184
185	/** @todo will this suffice? The Program Manager window covers the whole screen */
186	if (strcmp(szWindowText, "Program Manager"))
187	{
188	Log(("VBoxTray: Enum hwnd=%x rect (%d,%d) (%d,%d) (applying)\n", hwnd, rectWindow.left, rectWindow.top, rectWindow.right, rectWindow.bottom));
189	Log(("VBoxTray: title=%s style=%x exStyle=%x\n", szWindowText, dwStyle, dwExStyle));
190	Log(("VBoxTray: pid=%d tid=%d\n", pid, tid));
191
192	HRGN hrgn = CreateRectRgn(0,0,0,0);
193
194	int ret = GetWindowRgn(hwnd, hrgn);
195
196	if (ret == ERROR)
197	{
198	Log(("VBoxTray: GetWindowRgn failed with rc=%d\n", GetLastError()));
199	SetRectRgn(hrgn, rectVisible.left, rectVisible.top, rectVisible.right, rectVisible.bottom);
200	}
201	else
202	{
203	/* this region is relative to the window origin instead of the desktop origin */
204	OffsetRgn(hrgn, rectWindow.left, rectWindow.top);
205	}
206	if (lpParam->hrgn)
207	{
208	/* create a union of the current visible region and the visible rectangle of this window. */
209	CombineRgn(lpParam->hrgn, lpParam->hrgn, hrgn, RGN_OR);
210	DeleteObject(hrgn);
211	}
212	else
213	lpParam->hrgn = hrgn;
214	}
215	else
216	{
217	Log(("VBoxTray: Enum hwnd=%x rect (%d,%d) (%d,%d) (ignored)\n", hwnd, rectWindow.left, rectWindow.top, rectWindow.right, rectWindow.bottom));
218	Log(("VBoxTray: title=%s style=%x\n", szWindowText, dwStyle));
219	Log(("VBoxTray: pid=%d tid=%d\n", pid, tid));
220	}
221	}
222	return TRUE; /* continue enumeration */
223	}
224
225	void VBoxSeamlessCheckWindows()
226	{
227	VBOX_ENUM_PARAM param;
228
229	param.hdc = GetDC(HWND_DESKTOP);
230	param.hrgn = 0;
231
232	EnumWindows(VBoxEnumFunc, (LPARAM)&param);
233
234	if (param.hrgn)
235	{
236	DWORD cbSize;
237
238	cbSize = GetRegionData(param.hrgn, 0, NULL);
239	if (cbSize)
240	{
241	PVBOXDISPIFESCAPE lpEscapeData = (PVBOXDISPIFESCAPE)malloc(VBOXDISPIFESCAPE_SIZE(cbSize));
242	if (lpEscapeData)
243	{
244	lpEscapeData->escapeCode = VBOXESC_SETVISIBLEREGION;
245	LPRGNDATA lpRgnData = VBOXDISPIFESCAPE_DATA(lpEscapeData, RGNDATA);
246	memset(lpRgnData, 0, cbSize);
247	cbSize = GetRegionData(param.hrgn, cbSize, lpRgnData);
248	if (cbSize)
249	{
250	#ifdef DEBUG
251	RECT lpRect = (RECT )&lpRgnData->Buffer[0];
252	Log(("VBoxTray: New visible region: \n"));
253
254	for (DWORD i=0;i<lpRgnData->rdh.nCount;i++)
255	{
256	Log(("VBoxTray: visible rect (%d,%d)(%d,%d)\n", lpRect[i].left, lpRect[i].top, lpRect[i].right, lpRect[i].bottom));
257	}
258	#endif
259	LPRGNDATA lpCtxRgnData = VBOXDISPIFESCAPE_DATA(gCtx.lpEscapeData, RGNDATA);
260	if ( !gCtx.lpEscapeData
261	\|\| (lpCtxRgnData->rdh.dwSize + lpCtxRgnData->rdh.nRgnSize != cbSize)
262	\|\| memcmp(lpCtxRgnData, lpRgnData, cbSize))
263	{
264	/* send to display driver */
265	VBoxDispIfEscape(&gCtx.pEnv->dispIf, lpEscapeData, cbSize);
266
267	if (gCtx.lpEscapeData)
268	free(gCtx.lpEscapeData);
269	gCtx.lpEscapeData = lpEscapeData;
270	}
271	else
272	Log(("VBoxTray: Visible rectangles haven't changed; ignore\n"));
273	}
274	if (lpEscapeData != gCtx.lpEscapeData)
275	free(lpEscapeData);
276	}
277	}
278
279	DeleteObject(param.hrgn);
280	}
281
282	ReleaseDC(HWND_DESKTOP, param.hdc);
283	}
284
285	/**
286	* Thread function to wait for and process seamless mode change
287	* requests
288	*/
289	unsigned __stdcall VBoxSeamlessThread(void *pInstance)
290	{
291	VBOXSEAMLESSCONTEXT pCtx = (VBOXSEAMLESSCONTEXT )pInstance;
292	HANDLE gVBoxDriver = pCtx->pEnv->hDriver;
293	bool fTerminate = false;
294	VBoxGuestFilterMaskInfo maskInfo;
295	DWORD cbReturned;
296	BOOL fWasScreenSaverActive = FALSE, ret;
297
298	maskInfo.u32OrMask = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
299	maskInfo.u32NotMask = 0;
300	if (DeviceIoControl (gVBoxDriver, VBOXGUEST_IOCTL_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
301	{
302	Log(("VBoxTray: VBoxSeamlessThread: DeviceIOControl(CtlMask - or) succeeded\n"));
303	}
304	else
305	{
306	Log(("VBoxTray: VBoxSeamlessThread: DeviceIOControl(CtlMask) failed, SeamlessChangeThread exited\n"));
307	return 0;
308	}
309
310	do
311	{
312	/* wait for a seamless change event */
313	VBoxGuestWaitEventInfo waitEvent;
314	waitEvent.u32TimeoutIn = 5000;
315	waitEvent.u32EventMaskIn = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
316	if (DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_WAITEVENT, &waitEvent, sizeof(waitEvent), &waitEvent, sizeof(waitEvent), &cbReturned, NULL))
317	{
318	Log(("VBoxTray: VBoxSeamlessThread: DeviceIOControl succeeded\n"));
319
320	/* are we supposed to stop? */
321	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 0) == WAIT_OBJECT_0)
322	break;
323
324	Log(("VBoxTray: VBoxSeamlessThread: checking event\n"));
325
326	/* did we get the right event? */
327	if (waitEvent.u32EventFlagsOut & VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST)
328	{
329	Log(("VBoxTray: VBoxTray: going to get seamless change information\n"));
330
331	/* We got at least one event. Read the requested resolution
332	* and try to set it until success. New events will not be seen
333	* but a new resolution will be read in this poll loop.
334	*/
335	for (;;)
336	{
337	/* get the seamless change request */
338	VMMDevSeamlessChangeRequest seamlessChangeRequest = {0};
339	vmmdevInitRequest((VMMDevRequestHeader*)&seamlessChangeRequest, VMMDevReq_GetSeamlessChangeRequest);
340	seamlessChangeRequest.eventAck = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
341
342	BOOL fSeamlessChangeQueried = DeviceIoControl(gVBoxDriver, VBOXGUEST_IOCTL_VMMREQUEST(sizeof(seamlessChangeRequest)), &seamlessChangeRequest, sizeof(seamlessChangeRequest),
343	&seamlessChangeRequest, sizeof(seamlessChangeRequest), &cbReturned, NULL);
344	if (fSeamlessChangeQueried)
345	{
346	Log(("VBoxTray: VBoxSeamlessThread: mode change to %d\n", seamlessChangeRequest.mode));
347
348	switch(seamlessChangeRequest.mode)
349	{
350	case VMMDev_Seamless_Disabled:
351	if (fWasScreenSaverActive)
352	{
353	Log(("VBoxTray: Re-enabling the screensaver\n"));
354	ret = SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, TRUE, NULL, 0);
355	if (!ret)
356	Log(("VBoxTray: SystemParametersInfo SPI_SETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
357	}
358	PostMessage(ghwndToolWindow, WM_VBOX_REMOVE_SEAMLESS_HOOK, 0, 0);
359	break;
360
361	case VMMDev_Seamless_Visible_Region:
362	ret = SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, &fWasScreenSaverActive, 0);
363	if (!ret)
364	Log(("VBoxTray: SystemParametersInfo SPI_GETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
365
366	if (fWasScreenSaverActive)
367	Log(("VBoxTray: Disabling the screensaver\n"));
368
369	ret = SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
370	if (!ret)
371	Log(("VBoxTray: SystemParametersInfo SPI_SETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
372	PostMessage(ghwndToolWindow, WM_VBOX_INSTALL_SEAMLESS_HOOK, 0, 0);
373	break;
374
375	case VMMDev_Seamless_Host_Window:
376	break;
377
378	default:
379	AssertFailed();
380	break;
381	}
382	break;
383	}
384	else
385	{
386	Log(("VBoxTray: VBoxSeamlessThread: error from DeviceIoControl VBOXGUEST_IOCTL_VMMREQUEST\n"));
387	}
388	/* sleep a bit to not eat too much CPU while retrying */
389	/* are we supposed to stop? */
390	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 50) == WAIT_OBJECT_0)
391	{
392	fTerminate = true;
393	break;
394	}
395	}
396	}
397	}
398	else
399	{
400	Log(("VBoxTray: VBoxTray: error 0 from DeviceIoControl VBOXGUEST_IOCTL_WAITEVENT\n"));
401	/* sleep a bit to not eat too much CPU in case the above call always fails */
402	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 10) == WAIT_OBJECT_0)
403	{
404	fTerminate = true;
405	break;
406	}
407	}
408	}
409	while (!fTerminate);
410
411	maskInfo.u32OrMask = 0;
412	maskInfo.u32NotMask = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
413	if (DeviceIoControl (gVBoxDriver, VBOXGUEST_IOCTL_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
414	{
415	Log(("VBoxTray: VBoxSeamlessThread: DeviceIOControl(CtlMask - not) succeeded\n"));
416	}
417	else
418	{
419	Log(("VBoxTray: VBoxSeamlessThread: DeviceIOControl(CtlMask) failed\n"));
420	}
421
422	Log(("VBoxTray: VBoxSeamlessThread: finished seamless change request thread\n"));
423	return 0;
424	}
425

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxSeamless.cpp@ 45137

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