VBoxSeamless.cpp@ 8850

Last change on this file since 8850 was 8850, checked in by vboxsync, 17 years ago
Windows Guest Additions: Renamed VBoxService.exe to VBoxTray.exe. Internals left unchanged, because of moving these parts eventually to the new "real" VBoxService later.
Property svn:eol-style set to `native`
File size: 15.5 KB

Line
1	/** @file
2	*
3	* VBoxSeamless - Seamless windows
4	*
5	*/
6
7	/*
8	* Copyright (C) 2006-2007 Sun Microsystems, Inc.
9	*
10	* This file is part of VirtualBox Open Source Edition (OSE), as
11	* available from http://www.virtualbox.org. This file is free software;
12	* you can redistribute it and/or modify it under the terms of the GNU
13	* General Public License (GPL) as published by the Free Software
14	* Foundation, in version 2 as it comes in the "COPYING" file of the
15	* VirtualBox OSE distribution. VirtualBox OSE is distributed in the
16	* hope that it will be useful, but WITHOUT ANY WARRANTY of any kind.
17	*
18	* Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa
19	* Clara, CA 95054 USA or visit http://www.sun.com if you need
20	* additional information or have any questions.
21	*/
22	#define _WIN32_WINNT 0x0500
23	#include <windows.h>
24	#include "VBoxTray.h"
25	#include "VBoxSeamless.h"
26	#include <VBoxHook.h>
27	#include <VBoxDisplay.h>
28	#include <VBox/VBoxDev.h>
29	#include <iprt/assert.h>
30	#include "helpers.h"
31
32	typedef struct _VBOXSEAMLESSCONTEXT
33	{
34	const VBOXSERVICEENV *pEnv;
35
36	HMODULE hModule;
37
38	BOOL (* pfnVBoxInstallHook)(HMODULE hDll);
39	BOOL (* pfnVBoxRemoveHook)();
40
41	LPRGNDATA lpRgnData;
42	} VBOXSEAMLESSCONTEXT;
43
44	typedef struct
45	{
46	HDC hdc;
47	HRGN hrgn;
48	RECT rect;
49	} VBOX_ENUM_PARAM, *PVBOX_ENUM_PARAM;
50
51	static VBOXSEAMLESSCONTEXT gCtx = {0};
52
53	void VBoxLogString(HANDLE hDriver, char *pszStr);
54
55	int VBoxSeamlessInit(const VBOXSERVICEENV pEnv, void ppInstance, bool pfStartThread)
56	{
57	dprintf(("VBoxSeamlessInit\n"));
58
59	*pfStartThread = false;
60	gCtx.pEnv = pEnv;
61
62	OSVERSIONINFO OSinfo;
63	OSinfo.dwOSVersionInfoSize = sizeof (OSinfo);
64	GetVersionEx (&OSinfo);
65
66	/* We have to jump out here when using NT4, otherwise it complains about
67	a missing API function "UnhookWinEvent" used by the dynamically loaded VBoxHook.dll below */
68	if (OSinfo.dwMajorVersion <= 4) /* Windows NT 4.0 or older */
69	{
70	dprintf(("VBoxSeamlessInit: Windows NT 4.0 or older not supported!"));
71	return VERR_NOT_SUPPORTED;
72	}
73
74	/* Will fail if SetWinEventHook is not present (version < NT4 SP6 apparently) */
75	gCtx.hModule = LoadLibrary(VBOXHOOK_DLL_NAME);
76	if (gCtx.hModule)
77	{
78	(uintptr_t )&gCtx.pfnVBoxInstallHook = (uintptr_t)GetProcAddress(gCtx.hModule, "VBoxInstallHook");
79	(uintptr_t )&gCtx.pfnVBoxRemoveHook = (uintptr_t)GetProcAddress(gCtx.hModule, "VBoxRemoveHook");
80
81	/* inform the host that we support the seamless window mode */
82	VMMDevReqGuestCapabilities vmmreqGuestCaps = {0};
83	vmmdevInitRequest((VMMDevRequestHeader*)&vmmreqGuestCaps, VMMDevReq_ReportGuestCapabilities);
84	vmmreqGuestCaps.caps = VMMDEV_GUEST_SUPPORTS_SEAMLESS;
85
86	DWORD cbReturned;
87	if (!DeviceIoControl(pEnv->hDriver, IOCTL_VBOXGUEST_VMMREQUEST, &vmmreqGuestCaps, sizeof(vmmreqGuestCaps),
88	&vmmreqGuestCaps, sizeof(vmmreqGuestCaps), &cbReturned, NULL))
89	{
90	dprintf(("VBoxSeamlessInit: VMMDevReq_ReportGuestCapabilities: error doing IOCTL, last error: %d\n", GetLastError()));
91	return VERR_INVALID_PARAMETER;
92	}
93
94	*pfStartThread = true;
95	*ppInstance = &gCtx;
96	return VINF_SUCCESS;
97	}
98	else
99	{
100	dprintf(("VBoxSeamlessInit: LoadLibrary failed with %d\n", GetLastError()));
101	return VERR_INVALID_PARAMETER;
102	}
103
104	return VINF_SUCCESS;
105	}
106
107
108	void VBoxSeamlessDestroy(const VBOXSERVICEENV pEnv, void pInstance)
109	{
110	dprintf(("VBoxSeamlessDestroy\n"));
111	/* inform the host that we no longer support the seamless window mode */
112	VMMDevReqGuestCapabilities vmmreqGuestCaps = {0};
113	vmmdevInitRequest((VMMDevRequestHeader*)&vmmreqGuestCaps, VMMDevReq_ReportGuestCapabilities);
114	vmmreqGuestCaps.caps = 0;
115
116	DWORD cbReturned;
117	if (!DeviceIoControl(pEnv->hDriver, IOCTL_VBOXGUEST_VMMREQUEST, &vmmreqGuestCaps, sizeof(vmmreqGuestCaps),
118	&vmmreqGuestCaps, sizeof(vmmreqGuestCaps), &cbReturned, NULL))
119	{
120	dprintf(("VMMDevReq_ReportGuestCapabilities: error doing IOCTL, last error: %d\n", GetLastError()));
121	}
122
123	if (gCtx.pfnVBoxRemoveHook)
124	gCtx.pfnVBoxRemoveHook();
125	if (gCtx.hModule)
126	FreeLibrary(gCtx.hModule);
127	gCtx.hModule = 0;
128	return;
129	}
130
131	void VBoxSeamlessInstallHook()
132	{
133	if (gCtx.pfnVBoxInstallHook)
134	{
135	/* Check current visible region state */
136	VBoxSeamlessCheckWindows();
137
138	gCtx.pfnVBoxInstallHook(gCtx.hModule);
139	}
140	}
141
142	void VBoxSeamlessRemoveHook()
143	{
144	if (gCtx.pfnVBoxRemoveHook)
145	gCtx.pfnVBoxRemoveHook();
146
147	if (gCtx.lpRgnData)
148	{
149	free(gCtx.lpRgnData);
150	gCtx.lpRgnData = NULL;
151	}
152	}
153
154	BOOL CALLBACK VBoxEnumFunc(HWND hwnd, LPARAM lParam)
155	{
156	PVBOX_ENUM_PARAM lpParam = (PVBOX_ENUM_PARAM)lParam;
157	DWORD dwStyle, dwExStyle;
158	RECT rectWindow, rectVisible;
159
160	dwStyle = GetWindowLong(hwnd, GWL_STYLE);
161	dwExStyle = GetWindowLong(hwnd, GWL_EXSTYLE);
162	if ( !(dwStyle & WS_VISIBLE)
163	\|\| (dwStyle & WS_CHILD))
164	return TRUE;
165
166	dprintf(("VBoxEnumFunc %x\n", hwnd));
167	/* Only visible windows that are present on the desktop are interesting here */
168	if ( GetWindowRect(hwnd, &rectWindow)
169	&& IntersectRect(&rectVisible, &lpParam->rect, &rectWindow))
170	{
171	char szWindowText[256];
172	szWindowText[0] = 0;
173	GetWindowText(hwnd, szWindowText, sizeof(szWindowText));
174
175	/* Filter out Windows XP shadow windows */
176	/** @todo still shows inside the guest */
177	if ( szWindowText[0] == 0
178	&& dwStyle == (WS_POPUP\|WS_VISIBLE\|WS_CLIPSIBLINGS)
179	&& dwExStyle == (WS_EX_LAYERED\|WS_EX_TOOLWINDOW\|WS_EX_TRANSPARENT\|WS_EX_TOPMOST))
180	{
181	dprintf(("Filter out shadow window style=%x exstyle=%x\n", dwStyle, dwExStyle));
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	dprintf(("Enum hwnd=%x rect (%d,%d) (%d,%d)\n", hwnd, rectWindow.left, rectWindow.top, rectWindow.right, rectWindow.bottom));
189	dprintf(("title=%s style=%x exStyle=%x\n", szWindowText, dwStyle, dwExStyle));
190
191	HRGN hrgn = CreateRectRgn(0,0,0,0);
192
193	int ret = GetWindowRgn(hwnd, hrgn);
194
195	if (ret == ERROR)
196	{
197	dprintf(("GetWindowRgn failed with rc=%d\n", GetLastError()));
198	SetRectRgn(hrgn, rectVisible.left, rectVisible.top, rectVisible.right, rectVisible.bottom);
199	}
200	else
201	{
202	/* this region is relative to the window origin instead of the desktop origin */
203	OffsetRgn(hrgn, rectWindow.left, rectWindow.top);
204	}
205	if (lpParam->hrgn)
206	{
207	/* create a union of the current visible region and the visible rectangle of this window. */
208	CombineRgn(lpParam->hrgn, lpParam->hrgn, hrgn, RGN_OR);
209	DeleteObject(hrgn);
210	}
211	else
212	lpParam->hrgn = hrgn;
213	}
214	else
215	{
216	dprintf(("Enum hwnd=%x rect (%d,%d) (%d,%d) (ignored)\n", hwnd, rectWindow.left, rectWindow.top, rectWindow.right, rectWindow.bottom));
217	dprintf(("title=%s style=%x\n", szWindowText, dwStyle));
218	}
219	}
220	return TRUE; /* continue enumeration */
221	}
222
223	void VBoxSeamlessCheckWindows()
224	{
225	VBOX_ENUM_PARAM param;
226
227	param.hdc = GetDC(HWND_DESKTOP);
228	param.hrgn = 0;
229
230	GetWindowRect(GetDesktopWindow(), &param.rect);
231	dprintf(("VBoxRecheckVisibleWindows desktop=%x rect (%d,%d) (%d,%d)\n", GetDesktopWindow(), param.rect.left, param.rect.top, param.rect.right, param.rect.bottom));
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	LPRGNDATA lpRgnData = (LPRGNDATA)malloc(cbSize);
242	memset(lpRgnData, 0, cbSize);
243	if (lpRgnData)
244	{
245	cbSize = GetRegionData(param.hrgn, cbSize, lpRgnData);
246	if (cbSize)
247	{
248	#ifdef DEBUG
249	RECT lpRect = (RECT )&lpRgnData->Buffer[0];
250	dprintf(("New visible region: \n"));
251
252	for (DWORD i=0;i<lpRgnData->rdh.nCount;i++)
253	{
254	dprintf(("visible rect (%d,%d)(%d,%d)\n", lpRect[i].left, lpRect[i].top, lpRect[i].right, lpRect[i].bottom));
255	}
256	#endif
257	if ( !gCtx.lpRgnData
258	\|\| (gCtx.lpRgnData->rdh.dwSize + gCtx.lpRgnData->rdh.nRgnSize != cbSize)
259	\|\| memcmp(gCtx.lpRgnData, lpRgnData, cbSize))
260	{
261	/* send to display driver */
262	ExtEscape(param.hdc, VBOXESC_SETVISIBLEREGION, cbSize, (LPCSTR)lpRgnData, 0, NULL);
263
264	if (gCtx.lpRgnData)
265	free(gCtx.lpRgnData);
266	gCtx.lpRgnData = lpRgnData;
267	}
268	else
269	dprintf(("Visible rectangles haven't changed; ignore\n"));
270	}
271	if (lpRgnData != gCtx.lpRgnData)
272	free(lpRgnData);
273	}
274	}
275
276	DeleteObject(param.hrgn);
277	}
278
279	ReleaseDC(HWND_DESKTOP, param.hdc);
280	}
281
282	/**
283	* Thread function to wait for and process seamless mode change
284	* requests
285	*/
286	unsigned __stdcall VBoxSeamlessThread(void *pInstance)
287	{
288	VBOXSEAMLESSCONTEXT pCtx = (VBOXSEAMLESSCONTEXT )pInstance;
289	HANDLE gVBoxDriver = pCtx->pEnv->hDriver;
290	bool fTerminate = false;
291	VBoxGuestFilterMaskInfo maskInfo;
292	DWORD cbReturned;
293	BOOL fWasScreenSaverActive = FALSE, ret;
294
295	maskInfo.u32OrMask = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
296	maskInfo.u32NotMask = 0;
297	if (DeviceIoControl (gVBoxDriver, IOCTL_VBOXGUEST_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
298	{
299	dprintf(("VBoxSeamlessThread: DeviceIOControl(CtlMask - or) succeeded\n"));
300	}
301	else
302	{
303	dprintf(("VBoxSeamlessThread: DeviceIOControl(CtlMask) failed, SeamlessChangeThread exited\n"));
304	return 0;
305	}
306
307	do
308	{
309	/* wait for a seamless change event */
310	VBoxGuestWaitEventInfo waitEvent;
311	waitEvent.u32TimeoutIn = 5000;
312	waitEvent.u32EventMaskIn = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
313	if (DeviceIoControl(gVBoxDriver, IOCTL_VBOXGUEST_WAITEVENT, &waitEvent, sizeof(waitEvent), &waitEvent, sizeof(waitEvent), &cbReturned, NULL))
314	{
315	dprintf(("VBoxSeamlessThread: DeviceIOControl succeded\n"));
316
317	/* are we supposed to stop? */
318	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 0) == WAIT_OBJECT_0)
319	break;
320
321	dprintf(("VBoxSeamlessThread: checking event\n"));
322
323	/* did we get the right event? */
324	if (waitEvent.u32EventFlagsOut & VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST)
325	{
326	dprintf(("VBoxService: going to get seamless change information.\n"));
327
328	/* We got at least one event. Read the requested resolution
329	* and try to set it until success. New events will not be seen
330	* but a new resolution will be read in this poll loop.
331	*/
332	for (;;)
333	{
334	/* get the seamless change request */
335	VMMDevSeamlessChangeRequest seamlessChangeRequest = {0};
336	vmmdevInitRequest((VMMDevRequestHeader*)&seamlessChangeRequest, VMMDevReq_GetSeamlessChangeRequest);
337	seamlessChangeRequest.eventAck = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
338
339	BOOL fSeamlessChangeQueried = DeviceIoControl(gVBoxDriver, IOCTL_VBOXGUEST_VMMREQUEST, &seamlessChangeRequest, sizeof(seamlessChangeRequest),
340	&seamlessChangeRequest, sizeof(seamlessChangeRequest), &cbReturned, NULL);
341	if (fSeamlessChangeQueried)
342	{
343	dprintf(("VBoxSeamlessThread: mode change to %d\n", seamlessChangeRequest.mode));
344
345	switch(seamlessChangeRequest.mode)
346	{
347	case VMMDev_Seamless_Disabled:
348	if (fWasScreenSaverActive)
349	{
350	dprintf(("Re-enabling the screensaver\n"));
351	ret = SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, TRUE, NULL, 0);
352	if (!ret)
353	dprintf(("SystemParametersInfo SPI_SETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
354	}
355	PostMessage(gToolWindow, WM_VBOX_REMOVE_SEAMLESS_HOOK, 0, 0);
356	break;
357
358	case VMMDev_Seamless_Visible_Region:
359	ret = SystemParametersInfo(SPI_GETSCREENSAVEACTIVE, 0, &fWasScreenSaverActive, 0);
360	if (!ret)
361	dprintf(("SystemParametersInfo SPI_GETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
362
363	if (fWasScreenSaverActive)
364	dprintf(("Disabling the screensaver\n"));
365
366	ret = SystemParametersInfo(SPI_SETSCREENSAVEACTIVE, FALSE, NULL, 0);
367	if (!ret)
368	dprintf(("SystemParametersInfo SPI_SETSCREENSAVEACTIVE failed with %d\n", GetLastError()));
369	PostMessage(gToolWindow, WM_VBOX_INSTALL_SEAMLESS_HOOK, 0, 0);
370	break;
371
372	case VMMDev_Seamless_Host_Window:
373	break;
374
375	default:
376	AssertFailed();
377	break;
378	}
379	break;
380	}
381	else
382	{
383	dprintf(("VBoxSeamlessThread: error from DeviceIoControl IOCTL_VBOXGUEST_VMMREQUEST\n"));
384	}
385	/* sleep a bit to not eat too much CPU while retrying */
386	/* are we supposed to stop? */
387	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 50) == WAIT_OBJECT_0)
388	{
389	fTerminate = true;
390	break;
391	}
392	}
393	}
394	}
395	else
396	{
397	dprintf(("VBoxService: error 0 from DeviceIoControl IOCTL_VBOXGUEST_WAITEVENT\n"));
398	/* sleep a bit to not eat too much CPU in case the above call always fails */
399	if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 10) == WAIT_OBJECT_0)
400	{
401	fTerminate = true;
402	break;
403	}
404	}
405	}
406	while (!fTerminate);
407
408	maskInfo.u32OrMask = 0;
409	maskInfo.u32NotMask = VMMDEV_EVENT_SEAMLESS_MODE_CHANGE_REQUEST;
410	if (DeviceIoControl (gVBoxDriver, IOCTL_VBOXGUEST_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL))
411	{
412	dprintf(("VBoxSeamlessThread: DeviceIOControl(CtlMask - not) succeeded\n"));
413	}
414	else
415	{
416	dprintf(("VBoxSeamlessThread: DeviceIOControl(CtlMask) failed\n"));
417	}
418
419	dprintf(("VBoxSeamlessThread: finished seamless change request thread\n"));
420	return 0;
421	}
422

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxService/VBoxSeamless.cpp@ 8850

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