VBoxDisplay.cpp@ 85800

Last change on this file since 85800 was 85121, checked in by vboxsync, 4 years ago
iprt/cdefs.h: Refactored the typedef use of DECLCALLBACK as well as DECLCALLBACKMEMBER to wrap the whole expression, similar to the DECLR?CALLBACKMEMBER macros. This allows adding a throw() at the end when compiling with the VC++ compiler to indicate that the callbacks won't throw anything, so we can stop supressing the C5039 warning about passing functions that can potential throw C++ exceptions to extern C code that can't necessarily cope with such (unwind,++). Introduced a few _EX variations that allows specifying different/no calling convention too, as that's handy when dynamically resolving host APIs. Fixed numerous places missing DECLCALLBACK and such. Left two angry @todos regarding use of CreateThread. bugref:9794
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File size: 38.2 KB

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1	/* $Id: VBoxDisplay.cpp 85121 2020-07-08 19:33:26Z vboxsync $ */
2	/** @file
3	* VBoxSeamless - Display notifications.
4	*/
5
6	/*
7	* Copyright (C) 2006-2020 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
18
19	/*********************************************************************************************************************************
20	* Header Files *
21	*********************************************************************************************************************************/
22	#include "VBoxTray.h"
23	#include "VBoxHelpers.h"
24	#include "VBoxSeamless.h"
25
26	#include <iprt/alloca.h>
27	#include <iprt/assert.h>
28	#ifdef VBOX_WITH_WDDM
29	# include <iprt/asm.h>
30	#endif
31	#include <iprt/system.h>
32
33	#ifdef DEBUG /** @todo r=bird: these are all default values. sigh. */
34	# define LOG_ENABLED
35	# define LOG_GROUP LOG_GROUP_DEFAULT
36	#endif
37	#include <VBox/log.h>
38
39	#include <VBoxDisplay.h>
40	#include <VBoxHook.h>
41
42
43	/*********************************************************************************************************************************
44	* Structures and Typedefs *
45	*********************************************************************************************************************************/
46	typedef struct _VBOXDISPLAYCONTEXT
47	{
48	const VBOXSERVICEENV *pEnv;
49	BOOL fAnyX;
50	/** ChangeDisplaySettingsEx does not exist in NT. ResizeDisplayDevice uses the function. */
51	DECLCALLBACKMEMBER_EX(LONG,WINAPI, pfnChangeDisplaySettingsEx,(LPCTSTR lpszDeviceName, LPDEVMODE lpDevMode, HWND hwnd,
52	DWORD dwflags, LPVOID lParam));
53	/** EnumDisplayDevices does not exist in NT. isVBoxDisplayDriverActive et al. are using these functions. */
54	DECLCALLBACKMEMBER_EX(BOOL, WINAPI, pfnEnumDisplayDevices,(IN LPCSTR lpDevice, IN DWORD iDevNum,
55	OUT PDISPLAY_DEVICEA lpDisplayDevice, IN DWORD dwFlags));
56	/ Display driver interface, XPDM - WDDM abstraction see VBOXDISPIF definitions above */
57	VBOXDISPIF dispIf;
58	} VBOXDISPLAYCONTEXT, *PVBOXDISPLAYCONTEXT;
59
60	typedef enum
61	{
62	VBOXDISPLAY_DRIVER_TYPE_UNKNOWN = 0,
63	VBOXDISPLAY_DRIVER_TYPE_XPDM = 1,
64	VBOXDISPLAY_DRIVER_TYPE_WDDM = 2
65	} VBOXDISPLAY_DRIVER_TYPE;
66
67
68	/*********************************************************************************************************************************
69	* Global Variables *
70	*********************************************************************************************************************************/
71	static VBOXDISPLAYCONTEXT g_Ctx = { 0 };
72
73
74	/*********************************************************************************************************************************
75	* Internal Functions *
76	*********************************************************************************************************************************/
77	static VBOXDISPLAY_DRIVER_TYPE getVBoxDisplayDriverType(VBOXDISPLAYCONTEXT *pCtx);
78
79
80	static DECLCALLBACK(int) VBoxDisplayInit(const PVBOXSERVICEENV pEnv, void **ppInstance)
81	{
82	LogFlowFuncEnter();
83
84	PVBOXDISPLAYCONTEXT pCtx = &g_Ctx; /** @todo r=andy Use instance data via service lookup (add void pInstance). /
85	AssertPtr(pCtx);
86
87	int rc;
88	HMODULE hUser = GetModuleHandle("user32.dll"); /** @todo r=andy Use RTLdrXXX and friends. */
89
90	pCtx->pEnv = pEnv;
91
92	uint64_t const uNtVersion = RTSystemGetNtVersion();
93
94	if (NULL == hUser)
95	{
96	LogFlowFunc(("Could not get module handle of USER32.DLL!\n"));
97	rc = VERR_NOT_IMPLEMENTED;
98	}
99	else if (uNtVersion >= RTSYSTEM_MAKE_NT_VERSION(5, 0, 0)) /* APIs available only on W2K and up. */
100	{
101	/** @todo r=andy Use RTLdrXXX and friends. */
102	/** @todo r=andy No unicode version available? */
103	(uintptr_t )&pCtx->pfnChangeDisplaySettingsEx = (uintptr_t)GetProcAddress(hUser, "ChangeDisplaySettingsExA");
104	LogFlowFunc(("pfnChangeDisplaySettingsEx = %p\n", pCtx->pfnChangeDisplaySettingsEx));
105
106	(uintptr_t )&pCtx->pfnEnumDisplayDevices = (uintptr_t)GetProcAddress(hUser, "EnumDisplayDevicesA");
107	LogFlowFunc(("pfnEnumDisplayDevices = %p\n", pCtx->pfnEnumDisplayDevices));
108
109	#ifdef VBOX_WITH_WDDM
110	if (uNtVersion >= RTSYSTEM_MAKE_NT_VERSION(6, 0, 0))
111	{
112	/* This is Vista and up, check if we need to switch the display driver if to WDDM mode. */
113	LogFlowFunc(("this is Windows Vista and up\n"));
114	VBOXDISPLAY_DRIVER_TYPE enmType = getVBoxDisplayDriverType(pCtx);
115	if (enmType == VBOXDISPLAY_DRIVER_TYPE_WDDM)
116	{
117	LogFlowFunc(("WDDM driver is installed, switching display driver if to WDDM mode\n"));
118	/* This is hacky, but the most easiest way. */
119	VBOXDISPIF_MODE enmMode = uNtVersion < RTSYSTEM_MAKE_NT_VERSION(6, 1, 0)
120	? VBOXDISPIF_MODE_WDDM : VBOXDISPIF_MODE_WDDM_W7;
121	DWORD dwErr = VBoxDispIfSwitchMode(const_cast<PVBOXDISPIF>(&pEnv->dispIf), enmMode, NULL /* old mode, we don't care about it */);
122	if (dwErr == NO_ERROR)
123	{
124	LogFlowFunc(("DispIf successfully switched to WDDM mode\n"));
125	rc = VINF_SUCCESS;
126	}
127	else
128	{
129	LogFlowFunc(("Failed to switch DispIf to WDDM mode, error (%d)\n", dwErr));
130	rc = RTErrConvertFromWin32(dwErr);
131	}
132	}
133	else
134	rc = VINF_SUCCESS;
135	}
136	else
137	rc = VINF_SUCCESS;
138	#endif
139	}
140	else if (uNtVersion < RTSYSTEM_MAKE_NT_VERSION(5, 0, 0)) /* Windows NT 4.0. */
141	{
142	/* Nothing to do here yet. */
143	/** @todo r=andy Has this been tested? */
144	rc = VINF_SUCCESS;
145	}
146	else /* Unsupported platform. */
147	{
148	LogFlowFunc(("Warning: Display for platform not handled yet!\n"));
149	rc = VERR_NOT_IMPLEMENTED;
150	}
151
152	if (RT_SUCCESS(rc))
153	{
154	VBOXDISPIFESCAPE_ISANYX IsAnyX = { 0 };
155	IsAnyX.EscapeHdr.escapeCode = VBOXESC_ISANYX;
156	DWORD err = VBoxDispIfEscapeInOut(&pEnv->dispIf, &IsAnyX.EscapeHdr, sizeof(uint32_t));
157	if (err == NO_ERROR)
158	pCtx->fAnyX = !!IsAnyX.u32IsAnyX;
159	else
160	pCtx->fAnyX = TRUE;
161
162	*ppInstance = pCtx;
163	}
164
165	LogFlowFuncLeaveRC(rc);
166	return rc;
167	}
168
169	static DECLCALLBACK(void) VBoxDisplayDestroy(void *pInstance)
170	{
171	RT_NOREF(pInstance);
172	return;
173	}
174
175	static VBOXDISPLAY_DRIVER_TYPE getVBoxDisplayDriverType(PVBOXDISPLAYCONTEXT pCtx)
176	{
177	VBOXDISPLAY_DRIVER_TYPE enmType = VBOXDISPLAY_DRIVER_TYPE_UNKNOWN;
178
179	if (pCtx->pfnEnumDisplayDevices)
180	{
181	INT devNum = 0;
182	DISPLAY_DEVICE dispDevice;
183	FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0);
184	dispDevice.cb = sizeof(DISPLAY_DEVICE);
185
186	LogFlowFunc(("getVBoxDisplayDriverType: Checking for active VBox display driver (W2K+) ...\n"));
187
188	while (EnumDisplayDevices(NULL,
189	devNum,
190	&dispDevice,
191	0))
192	{
193	LogFlowFunc(("getVBoxDisplayDriverType: DevNum:%d\nName:%s\nString:%s\nID:%s\nKey:%s\nFlags=%08X\n\n",
194	devNum,
195	&dispDevice.DeviceName[0],
196	&dispDevice.DeviceString[0],
197	&dispDevice.DeviceID[0],
198	&dispDevice.DeviceKey[0],
199	dispDevice.StateFlags));
200
201	if (dispDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
202	{
203	LogFlowFunc(("getVBoxDisplayDriverType: Primary device\n"));
204
205	/* WDDM driver can now have multiple incarnations,
206	* if the driver name contains VirtualBox, and does NOT match the XPDM name,
207	* assume it to be WDDM */
208	if (strcmp(&dispDevice.DeviceString[0], "VirtualBox Graphics Adapter") == 0)
209	enmType = VBOXDISPLAY_DRIVER_TYPE_XPDM;
210	else if (strstr(&dispDevice.DeviceString[0], "VirtualBox"))
211	enmType = VBOXDISPLAY_DRIVER_TYPE_WDDM;
212
213	break;
214	}
215
216	FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0);
217
218	dispDevice.cb = sizeof(DISPLAY_DEVICE);
219
220	devNum++;
221	}
222	}
223	else /* This must be NT 4 or something really old, so don't use EnumDisplayDevices() here ... */
224	{
225	LogFlowFunc(("getVBoxDisplayDriverType: Checking for active VBox display driver (NT or older) ...\n"));
226
227	DEVMODE tempDevMode;
228	ZeroMemory (&tempDevMode, sizeof (tempDevMode));
229	tempDevMode.dmSize = sizeof(DEVMODE);
230	EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &tempDevMode); /* Get current display device settings */
231
232	/* Check for the short name, because all long stuff would be truncated */
233	if (strcmp((char*)&tempDevMode.dmDeviceName[0], "VBoxDisp") == 0)
234	enmType = VBOXDISPLAY_DRIVER_TYPE_XPDM;
235	}
236
237	return enmType;
238	}
239
240	/** @todo r=andy The "display", "seamless" (and VBoxCaps facility in VBoxTray.cpp indirectly) is using this.
241	* Add a PVBOXDISPLAYCONTEXT here for properly getting the display (XPDM/WDDM) abstraction interfaces. */
242	DWORD EnableAndResizeDispDev(DEVMODE paDeviceModes, DISPLAY_DEVICE paDisplayDevices,
243	DWORD totalDispNum, UINT Id, DWORD aWidth, DWORD aHeight,
244	DWORD aBitsPerPixel, LONG aPosX, LONG aPosY, BOOL fEnabled, BOOL fExtDispSup)
245	{
246	DISPLAY_DEVICE displayDeviceTmp;
247	DISPLAY_DEVICE displayDevice;
248	DEVMODE deviceMode;
249	DWORD dwStatus = DISP_CHANGE_SUCCESSFUL;
250	DWORD iter ;
251
252	PVBOXDISPLAYCONTEXT pCtx = &g_Ctx; /* See todo above. */
253
254	deviceMode = paDeviceModes[Id];
255	displayDevice = paDisplayDevices[Id];
256
257	for (iter = 0; iter < totalDispNum; iter++)
258	{
259	if (iter != 0 && iter != Id && !(paDisplayDevices[iter].StateFlags & DISPLAY_DEVICE_ACTIVE))
260	{
261	LogRel(("Display: Initially disabling monitor with ID=%ld; total monitor count is %ld\n", iter, totalDispNum));
262	DEVMODE deviceModeTmp;
263	ZeroMemory(&deviceModeTmp, sizeof(DEVMODE));
264	deviceModeTmp.dmSize = sizeof(DEVMODE);
265	deviceModeTmp.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL \| DM_POSITION
266	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS ;
267	displayDeviceTmp = paDisplayDevices[iter];
268	pCtx->pfnChangeDisplaySettingsEx(displayDeviceTmp.DeviceName, &deviceModeTmp, NULL,
269	(CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
270	}
271	}
272
273	if (fExtDispSup) /* Extended Display Support possible*/
274	{
275	if (fEnabled)
276	{
277	/* Special case for enabling the secondary monitor. */
278	if(!(displayDevice.StateFlags & DISPLAY_DEVICE_ACTIVE))
279	{
280	LogRel(("Display [ID=%ld, name='%s']: Is a secondary monitor and disabled -- enabling it\n", Id, displayDevice.DeviceName));
281	deviceMode.dmPosition.x = paDeviceModes[0].dmPelsWidth;
282	deviceMode.dmPosition.y = 0;
283	deviceMode.dmBitsPerPel = 32;
284
285	uint64_t const uNtVersion = RTSystemGetNtVersion();
286	if (uNtVersion < RTSYSTEM_MAKE_NT_VERSION(6, 0, 0))
287	/* dont any more flags here as, only DM_POISITON is used to enable the secondary display */
288	deviceMode.dmFields = DM_POSITION;
289	else /* for win 7 and above */
290	/* for vista and above DM_BITSPERPEL is necessary */
291	deviceMode.dmFields = DM_BITSPERPEL \| DM_DISPLAYFLAGS \| DM_DISPLAYFREQUENCY \| DM_POSITION;
292
293	dwStatus = pCtx->pfnChangeDisplaySettingsEx((LPSTR)displayDevice.DeviceName,&deviceMode, NULL, (CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
294	/* A second call to ChangeDisplaySettings updates the monitor.*/
295	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
296	}
297	else /* secondary monitor already enabled. Request to change the resolution or position. */
298	{
299	if (aWidth !=0 && aHeight != 0)
300	{
301	LogRel(("Display [ID=%ld, name='%s']: Changing resolution to %ldx%ld\n", Id, displayDevice.DeviceName, aWidth, aHeight));
302	deviceMode.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL
303	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS;
304	deviceMode.dmPelsWidth = aWidth;
305	deviceMode.dmPelsHeight = aHeight;
306	deviceMode.dmBitsPerPel = aBitsPerPixel;
307	}
308	if (aPosX != 0 \|\| aPosY != 0)
309	{
310	LogRel(("Display [ID=%ld, name='%s']: Changing position to %ld,%ld\n", Id, displayDevice.DeviceName, aPosX, aPosY));
311	deviceMode.dmFields \|= DM_POSITION;
312	deviceMode.dmPosition.x = aPosX;
313	deviceMode.dmPosition.y = aPosY;
314	}
315	dwStatus = pCtx->pfnChangeDisplaySettingsEx((LPSTR)displayDevice.DeviceName,
316	&deviceMode, NULL, CDS_NORESET\|CDS_UPDATEREGISTRY, NULL);
317	/* A second call to ChangeDisplaySettings updates the monitor. */
318	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
319	}
320	}
321	else /* Request is there to disable the monitor with ID = Id*/
322	{
323	LogRel(("Display [ID=%ld, name='%s']: Disalbing\n", Id, displayDevice.DeviceName));
324
325	DEVMODE deviceModeTmp;
326	ZeroMemory(&deviceModeTmp, sizeof(DEVMODE));
327	deviceModeTmp.dmSize = sizeof(DEVMODE);
328	deviceModeTmp.dmFields = DM_PELSWIDTH \| DM_PELSHEIGHT \| DM_BITSPERPEL \| DM_POSITION
329	\| DM_DISPLAYFREQUENCY \| DM_DISPLAYFLAGS ;
330	displayDeviceTmp = paDisplayDevices[Id];
331	dwStatus = pCtx->pfnChangeDisplaySettingsEx(displayDeviceTmp.DeviceName, &deviceModeTmp, NULL,
332	(CDS_UPDATEREGISTRY \| CDS_NORESET), NULL);
333	pCtx->pfnChangeDisplaySettingsEx(NULL, NULL, NULL,0, NULL);
334	}
335	}
336	return dwStatus;
337	}
338
339	DWORD VBoxDisplayGetCount(void)
340	{
341	DISPLAY_DEVICE DisplayDevice;
342
343	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
344	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
345
346	/* Find out how many display devices the system has */
347	DWORD NumDevices = 0;
348	DWORD i = 0;
349	while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0))
350	{
351	LogFlowFunc(("ResizeDisplayDevice: [%d] %s\n", i, DisplayDevice.DeviceName));
352
353	if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
354	{
355	LogFlowFunc(("ResizeDisplayDevice: Found primary device. err %d\n", GetLastError ()));
356	NumDevices++;
357	}
358	else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER))
359	{
360
361	LogFlowFunc(("ResizeDisplayDevice: Found secondary device. err %d\n", GetLastError ()));
362	NumDevices++;
363	}
364
365	ZeroMemory(&DisplayDevice, sizeof(DisplayDevice));
366	DisplayDevice.cb = sizeof(DisplayDevice);
367	i++;
368	}
369
370	return NumDevices;
371	}
372
373	DWORD VBoxDisplayGetConfig(const DWORD NumDevices, DWORD pDevPrimaryNum, DWORD pNumDevices,
374	DISPLAY_DEVICE paDisplayDevices, DEVMODE paDeviceModes)
375	{
376	/* Fetch information about current devices and modes. */
377	DWORD DevNum = 0;
378	DWORD DevPrimaryNum = 0;
379
380	DISPLAY_DEVICE DisplayDevice;
381
382	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
383	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
384
385	DWORD i = 0;
386	while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0))
387	{
388	LogFlowFunc(("ResizeDisplayDevice: [%d(%d)] %s\n", i, DevNum, DisplayDevice.DeviceName));
389
390	BOOL bFetchDevice = FALSE;
391
392	if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE)
393	{
394	LogFlowFunc(("ResizeDisplayDevice: Found primary device. err %d\n", GetLastError ()));
395	DevPrimaryNum = DevNum;
396	bFetchDevice = TRUE;
397	}
398	else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER))
399	{
400
401	LogFlowFunc(("ResizeDisplayDevice: Found secondary device. err %d\n", GetLastError ()));
402	bFetchDevice = TRUE;
403	}
404
405	if (bFetchDevice)
406	{
407	if (DevNum >= NumDevices)
408	{
409	LogFlowFunc(("ResizeDisplayDevice: %d >= %d\n", NumDevices, DevNum));
410	return ERROR_BUFFER_OVERFLOW;
411	}
412
413	paDisplayDevices[DevNum] = DisplayDevice;
414
415	/* First try to get the video mode stored in registry (ENUM_REGISTRY_SETTINGS).
416	* A secondary display could be not active at the moment and would not have
417	* a current video mode (ENUM_CURRENT_SETTINGS).
418	*/
419	ZeroMemory(&paDeviceModes[DevNum], sizeof(DEVMODE));
420	paDeviceModes[DevNum].dmSize = sizeof(DEVMODE);
421	if (!EnumDisplaySettings((LPSTR)DisplayDevice.DeviceName,
422	ENUM_REGISTRY_SETTINGS, &paDeviceModes[DevNum]))
423	{
424	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings error %d\n", GetLastError ()));
425	}
426
427	if ( paDeviceModes[DevNum].dmPelsWidth == 0
428	\|\| paDeviceModes[DevNum].dmPelsHeight == 0)
429	{
430	/* No ENUM_REGISTRY_SETTINGS yet. Seen on Vista after installation.
431	* Get the current video mode then.
432	*/
433	ZeroMemory(&paDeviceModes[DevNum], sizeof(DEVMODE));
434	paDeviceModes[DevNum].dmSize = sizeof(DEVMODE);
435	if (!EnumDisplaySettings((LPSTR)DisplayDevice.DeviceName,
436	ENUM_CURRENT_SETTINGS, &paDeviceModes[DevNum]))
437	{
438	/* ENUM_CURRENT_SETTINGS returns FALSE when the display is not active:
439	* for example a disabled secondary display.
440	* Do not return here, ignore the error and set the display info to 0x0x0.
441	*/
442	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings(ENUM_CURRENT_SETTINGS) error %d\n", GetLastError ()));
443	}
444	}
445
446
447	DevNum++;
448	}
449
450	ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE));
451	DisplayDevice.cb = sizeof(DISPLAY_DEVICE);
452	i++;
453	}
454
455	*pNumDevices = DevNum;
456	*pDevPrimaryNum = DevPrimaryNum;
457
458	return NO_ERROR;
459	}
460
461	static void ResizeDisplayDeviceNT4(DWORD dwNewXRes, DWORD dwNewYRes, DWORD dwNewBpp)
462	{
463	DEVMODE devMode;
464
465	RT_ZERO(devMode);
466	devMode.dmSize = sizeof(DEVMODE);
467
468	/* get the current screen setup */
469	if (!EnumDisplaySettings(NULL, ENUM_REGISTRY_SETTINGS, &devMode))
470	{
471	LogFlowFunc(("error from EnumDisplaySettings: %d\n", GetLastError()));
472	return;
473	}
474
475	LogFlowFunc(("Current mode: %d x %d x %d at %d,%d\n",
476	devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel, devMode.dmPosition.x, devMode.dmPosition.y));
477
478	/* Check whether a mode reset or a change is requested. */
479	if (dwNewXRes \|\| dwNewYRes \|\| dwNewBpp)
480	{
481	/* A change is requested.
482	* Set values which are not to be changed to the current values.
483	*/
484	if (!dwNewXRes)
485	dwNewXRes = devMode.dmPelsWidth;
486	if (!dwNewYRes)
487	dwNewYRes = devMode.dmPelsHeight;
488	if (!dwNewBpp)
489	dwNewBpp = devMode.dmBitsPerPel;
490	}
491	else
492	{
493	/* All zero values means a forced mode reset. Do nothing. */
494	LogFlowFunc(("Forced mode reset\n"));
495	}
496
497	/* Verify that the mode is indeed changed. */
498	if (devMode.dmPelsWidth == dwNewXRes
499	&& devMode.dmPelsHeight == dwNewYRes
500	&& devMode.dmBitsPerPel == dwNewBpp)
501	{
502	LogFlowFunc(("already at desired resolution\n"));
503	return;
504	}
505
506	// without this, Windows will not ask the miniport for its
507	// mode table but uses an internal cache instead
508	DEVMODE tempDevMode = { 0 };
509	tempDevMode.dmSize = sizeof(DEVMODE);
510	EnumDisplaySettings(NULL, 0xffffff, &tempDevMode);
511
512	/* adjust the values that are supposed to change */
513	if (dwNewXRes)
514	devMode.dmPelsWidth = dwNewXRes;
515	if (dwNewYRes)
516	devMode.dmPelsHeight = dwNewYRes;
517	if (dwNewBpp)
518	devMode.dmBitsPerPel = dwNewBpp;
519
520	LogFlowFunc(("setting new mode %d x %d, %d BPP\n",
521	devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel));
522
523	/* set the new mode */
524	LONG status = ChangeDisplaySettings(&devMode, CDS_UPDATEREGISTRY);
525	if (status != DISP_CHANGE_SUCCESSFUL)
526	{
527	LogFlowFunc(("error from ChangeDisplaySettings: %d\n", status));
528
529	if (status == DISP_CHANGE_BADMODE)
530	{
531	/* Our driver can not set the requested mode. Stop trying. */
532	return;
533	}
534	}
535	}
536
537	/* Returns TRUE to try again. */
538	/** @todo r=andy Why not using the VMMDevDisplayChangeRequestEx structure for all those parameters here? */
539	static BOOL ResizeDisplayDevice(PVBOXDISPLAYCONTEXT pCtx,
540	UINT Id, DWORD Width, DWORD Height, DWORD BitsPerPixel,
541	BOOL fEnabled, LONG dwNewPosX, LONG dwNewPosY, bool fChangeOrigin,
542	BOOL fExtDispSup)
543	{
544	BOOL fDispAlreadyEnabled = false; /* check whether the monitor with ID is already enabled. */
545	BOOL fModeReset = ( Width == 0 && Height == 0 && BitsPerPixel == 0
546	&& dwNewPosX == 0 && dwNewPosY == 0 && !fChangeOrigin);
547	DWORD dmFields = 0;
548	VBOXDISPLAY_DRIVER_TYPE enmDriverType = getVBoxDisplayDriverType(pCtx);
549
550	LogFlowFunc(("[%d] %dx%d at %d,%d fChangeOrigin %d fEnabled %d fExtDisSup %d\n",
551	Id, Width, Height, dwNewPosX, dwNewPosY, fChangeOrigin, fEnabled, fExtDispSup));
552
553	if (!pCtx->fAnyX)
554	Width &= 0xFFF8;
555
556	VBoxDispIfCancelPendingResize(&pCtx->pEnv->dispIf);
557
558	DWORD NumDevices = VBoxDisplayGetCount();
559
560	if (NumDevices == 0 \|\| Id >= NumDevices)
561	{
562	LogFlowFunc(("ResizeDisplayDevice: Requested identifier %d is invalid. err %d\n", Id, GetLastError ()));
563	return FALSE;
564	}
565
566	LogFlowFunc(("ResizeDisplayDevice: Found total %d devices. err %d\n", NumDevices, GetLastError ()));
567
568	DISPLAY_DEVICE paDisplayDevices = (DISPLAY_DEVICE )alloca(sizeof (DISPLAY_DEVICE) * NumDevices);
569	DEVMODE paDeviceModes = (DEVMODE )alloca(sizeof (DEVMODE) * NumDevices);
570	RECTL paRects = (RECTL )alloca (sizeof (RECTL) * NumDevices);
571	DWORD DevNum = 0;
572	DWORD DevPrimaryNum = 0;
573	DWORD dwStatus = VBoxDisplayGetConfig(NumDevices, &DevPrimaryNum, &DevNum, paDisplayDevices, paDeviceModes);
574	if (dwStatus != NO_ERROR)
575	{
576	LogFlowFunc(("ResizeDisplayDevice: VBoxGetDisplayConfig failed, %d\n", dwStatus));
577	return dwStatus;
578	}
579
580	if (NumDevices != DevNum)
581	LogFlowFunc(("ResizeDisplayDevice: NumDevices(%d) != DevNum(%d)\n", NumDevices, DevNum));
582
583	DWORD i;
584	for (i = 0; i < DevNum; ++i)
585	{
586	if (fExtDispSup)
587	{
588	LogRel(("Extended Display Support.\n"));
589	LogFlowFunc(("[%d] %dx%dx%d at %d,%d, dmFields 0x%x\n",
590	i,
591	paDeviceModes[i].dmPelsWidth,
592	paDeviceModes[i].dmPelsHeight,
593	paDeviceModes[i].dmBitsPerPel,
594	paDeviceModes[i].dmPosition.x,
595	paDeviceModes[i].dmPosition.y,
596	paDeviceModes[i].dmFields));
597	}
598	else
599	{
600	LogRel(("NO Ext Display Support \n"));
601	}
602
603	paRects[i].left = paDeviceModes[i].dmPosition.x;
604	paRects[i].top = paDeviceModes[i].dmPosition.y;
605	paRects[i].right = paDeviceModes[i].dmPosition.x + paDeviceModes[i].dmPelsWidth;
606	paRects[i].bottom = paDeviceModes[i].dmPosition.y + paDeviceModes[i].dmPelsHeight;
607	}
608
609	/* Keep a record if the display with ID is already active or not. */
610	if (paDisplayDevices[Id].StateFlags & DISPLAY_DEVICE_ACTIVE)
611	{
612	LogRel(("Display with ID=%d already enabled\n", Id));
613	fDispAlreadyEnabled = TRUE;
614	}
615
616	/* Width, height equal to 0 means that this value must be not changed.
617	* Update input parameters if necessary.
618	* Note: BitsPerPixel is taken into account later, when new rectangles
619	* are assigned to displays.
620	*/
621	if (Width == 0)
622	Width = paRects[Id].right - paRects[Id].left;
623	else
624	dmFields \|= DM_PELSWIDTH;
625
626	if (Height == 0)
627	Height = paRects[Id].bottom - paRects[Id].top;
628	else
629	dmFields \|= DM_PELSHEIGHT;
630
631	if (BitsPerPixel == 0)
632	BitsPerPixel = paDeviceModes[Id].dmBitsPerPel;
633	else
634	dmFields \|= DM_BITSPERPEL;
635
636	if (!fChangeOrigin)
637	{
638	/* Use existing position. */
639	dwNewPosX = paRects[Id].left;
640	dwNewPosY = paRects[Id].top;
641	LogFlowFunc(("existing dwNewPosX %d, dwNewPosY %d\n", dwNewPosX, dwNewPosY));
642	}
643
644	/* Always update the position.
645	* It is either explicitly requested or must be set to the existing position.
646	*/
647	dmFields \|= DM_POSITION;
648
649	/* Check whether a mode reset or a change is requested.
650	* Rectangle position is recalculated only if fEnabled is 1.
651	* For non extended supported modes (old Host VMs), fEnabled
652	* is always 1.
653	*/
654	/* Handled the case where previouseresolution of secondary monitor
655	* was for eg. 102476832 and monitor was in disabled state.
656	* User gives the command
657	* setvideomode 1024 768 32 1 yes.
658	* Now in this case the resolution request is same as previous one but
659	* monitor is going from disabled to enabled state so the below condition
660	* shour return false
661	* The below condition will only return true , if no mode reset has
662	* been requested AND fEnabled is 1 and fDispAlreadyEnabled is also 1 AND
663	* all rect conditions are true. Thus in this case nothing has to be done.
664	*/
665	if ( !fModeReset
666	&& (!fEnabled == !fDispAlreadyEnabled)
667	&& paRects[Id].left == dwNewPosX
668	&& paRects[Id].top == dwNewPosY
669	&& paRects[Id].right - paRects[Id].left == (LONG)Width
670	&& paRects[Id].bottom - paRects[Id].top == (LONG)Height
671	&& paDeviceModes[Id].dmBitsPerPel == BitsPerPixel)
672	{
673	LogRel(("Already at desired resolution. No Change.\n"));
674	return FALSE;
675	}
676
677	hlpResizeRect(paRects, NumDevices, DevPrimaryNum, Id,
678	fEnabled ? Width : 0, fEnabled ? Height : 0, dwNewPosX, dwNewPosY);
679
680	for (i = 0; i < NumDevices; i++)
681	{
682	LogFlowFunc(("ResizeDisplayDevice: [%d]: %d,%d %dx%d\n",
683	i, paRects[i].left, paRects[i].top,
684	paRects[i].right - paRects[i].left,
685	paRects[i].bottom - paRects[i].top));
686	}
687
688	/* Assign the new rectangles to displays. */
689	for (i = 0; i < NumDevices; i++)
690	{
691	paDeviceModes[i].dmPosition.x = paRects[i].left;
692	paDeviceModes[i].dmPosition.y = paRects[i].top;
693	paDeviceModes[i].dmPelsWidth = paRects[i].right - paRects[i].left;
694	paDeviceModes[i].dmPelsHeight = paRects[i].bottom - paRects[i].top;
695
696	if (i == Id)
697	paDeviceModes[i].dmBitsPerPel = BitsPerPixel;
698
699	if (enmDriverType >= VBOXDISPLAY_DRIVER_TYPE_WDDM)
700	{
701	paDeviceModes[i].dmFields \|= dmFields;
702
703	/* On Vista one must specify DM_BITSPERPEL.
704	* Note that the current mode dmBitsPerPel is already in the DEVMODE structure.
705	*/
706	if (!(paDeviceModes[i].dmFields & DM_BITSPERPEL))
707	{
708	LogFlowFunc(("no DM_BITSPERPEL\n"));
709	paDeviceModes[i].dmFields \|= DM_BITSPERPEL;
710	paDeviceModes[i].dmBitsPerPel = 32;
711	}
712	}
713	else
714	{
715	paDeviceModes[i].dmFields = DM_POSITION \| DM_PELSHEIGHT \| DM_PELSWIDTH \| DM_BITSPERPEL;
716	}
717
718	LogFlowFunc(("ResizeDisplayDevice: Going to resize display %d to %dx%dx%d at %d,%d fields 0x%X\n",
719	i,
720	paDeviceModes[i].dmPelsWidth,
721	paDeviceModes[i].dmPelsHeight,
722	paDeviceModes[i].dmBitsPerPel,
723	paDeviceModes[i].dmPosition.x,
724	paDeviceModes[i].dmPosition.y,
725	paDeviceModes[i].dmFields));
726	}
727
728	if (enmDriverType == VBOXDISPLAY_DRIVER_TYPE_WDDM)
729	{
730	DWORD err = VBoxDispIfResizeModes(&pCtx->pEnv->dispIf, Id, fEnabled, fExtDispSup, paDisplayDevices, paDeviceModes, DevNum);
731
732	return (err == ERROR_RETRY);
733	}
734
735	/* The XPDM code path goes below.
736	* Re-requesting modes with EnumDisplaySettings forces Windows to again ask the miniport for its mode table.
737	*/
738	for (i = 0; i < NumDevices; i++)
739	{
740	DEVMODE tempDevMode;
741	ZeroMemory (&tempDevMode, sizeof (tempDevMode));
742	tempDevMode.dmSize = sizeof(DEVMODE);
743	EnumDisplaySettings((LPSTR)paDisplayDevices[i].DeviceName, 0xffffff, &tempDevMode);
744	LogFlowFunc(("ResizeDisplayDevice: EnumDisplaySettings last error %d\n", GetLastError ()));
745	}
746
747	/* Assign the new rectangles to displays. */
748	for (i = 0; i < NumDevices; i++)
749	{
750	LONG status = pCtx->pfnChangeDisplaySettingsEx((LPSTR)paDisplayDevices[i].DeviceName,
751	&paDeviceModes[i], NULL, CDS_NORESET \| CDS_UPDATEREGISTRY, NULL);
752	LogFlowFunc(("ResizeDisplayDevice: ChangeDisplaySettingsEx position status %d, err %d\n", status, GetLastError()));
753	NOREF(status);
754	}
755
756	LogFlowFunc(("Enable And Resize Device. Id = %d, Width=%d Height=%d, dwNewPosX = %d, dwNewPosY = %d fEnabled=%d & fExtDispSupport = %d \n",
757	Id, Width, Height, dwNewPosX, dwNewPosY, fEnabled, fExtDispSup));
758	dwStatus = EnableAndResizeDispDev(paDeviceModes, paDisplayDevices, DevNum, Id, Width, Height, BitsPerPixel,
759	dwNewPosX, dwNewPosY, fEnabled, fExtDispSup);
760	if (dwStatus == DISP_CHANGE_SUCCESSFUL \|\| dwStatus == DISP_CHANGE_BADMODE)
761	{
762	/* Successfully set new video mode or our driver can not set
763	* the requested mode. Stop trying.
764	*/
765	return FALSE;
766	}
767	/* Retry the request. */
768	return TRUE;
769	}
770
771	static void doResize(PVBOXDISPLAYCONTEXT pCtx,
772	uint32_t iDisplay,
773	uint32_t cx,
774	uint32_t cy,
775	uint32_t cBits,
776	bool fEnabled,
777	uint32_t cxOrigin,
778	uint32_t cyOrigin,
779	bool fChangeOrigin)
780	{
781	for (;;)
782	{
783	VBOXDISPLAY_DRIVER_TYPE enmDriverType = getVBoxDisplayDriverType(pCtx);
784	if (enmDriverType == VBOXDISPLAY_DRIVER_TYPE_UNKNOWN)
785	{
786	LogFlowFunc(("vboxDisplayDriver is not active\n"));
787	break;
788	}
789
790	if (pCtx->pfnChangeDisplaySettingsEx != 0)
791	{
792	LogFlowFunc(("Detected W2K or later\n"));
793	if (!ResizeDisplayDevice(pCtx,
794	iDisplay,
795	cx,
796	cy,
797	cBits,
798	fEnabled,
799	cxOrigin,
800	cyOrigin,
801	fChangeOrigin,
802	true /fExtDispSup/ ))
803	{
804	LogFlowFunc(("ResizeDipspalyDevice return 0\n"));
805	break;
806	}
807
808	}
809	else
810	{
811	LogFlowFunc(("Detected NT\n"));
812	ResizeDisplayDeviceNT4(cx, cy, cBits);
813	break;
814	}
815
816	/* Retry the change a bit later. */
817	RTThreadSleep(1000);
818	}
819	}
820
821	static BOOL DisplayChangeRequestHandler(PVBOXDISPLAYCONTEXT pCtx)
822	{
823	VMMDevDisplayDef aDisplays[64];
824	uint32_t cDisplays = RT_ELEMENTS(aDisplays);
825	int rc = VINF_SUCCESS;
826
827	/* Multidisplay resize is still implemented only for Win7 and newer guests. */
828	if (pCtx->pEnv->dispIf.enmMode >= VBOXDISPIF_MODE_WDDM_W7 &&
829	RT_SUCCESS(rc = VbglR3GetDisplayChangeRequestMulti(cDisplays, &cDisplays, &aDisplays[0], true /* fAck */)))
830	{
831	uint32_t i;
832
833	LogRel(("Got multi resize request %d displays\n", cDisplays));
834
835	for (i = 0; i < cDisplays; ++i)
836	{
837	LogRel(("[%d]: %d 0x%02X %d,%d %dx%d %d\n",
838	i, aDisplays[i].idDisplay,
839	aDisplays[i].fDisplayFlags,
840	aDisplays[i].xOrigin,
841	aDisplays[i].yOrigin,
842	aDisplays[i].cx,
843	aDisplays[i].cy,
844	aDisplays[i].cBitsPerPixel));
845	}
846
847	return VBoxDispIfResizeDisplayWin7(&pCtx->pEnv->dispIf, cDisplays, &aDisplays[0]);
848	}
849
850	/* Fall back to the single monitor resize request. */
851
852	/*
853	* We got at least one event. (bird: What does that mean actually? The driver wakes us up immediately upon
854	* receiving the event. Or are we refering to mouse & display? In the latter case it's misleading.)
855	*
856	* Read the requested resolution and try to set it until success.
857	* New events will not be seen but a new resolution will be read in
858	* this poll loop.
859	*
860	* Note! The interface we're using here was added in VBox 4.2.4. As of 2017-08-16, this
861	* version has been unsupported for a long time and we therefore don't bother
862	* implementing fallbacks using VMMDevDisplayChangeRequest2 and VMMDevDisplayChangeRequest.
863	*/
864	uint32_t cx = 0;
865	uint32_t cy = 0;
866	uint32_t cBits = 0;
867	uint32_t iDisplay = 0;
868	uint32_t cxOrigin = 0;
869	uint32_t cyOrigin = 0;
870	bool fChangeOrigin = false;
871	bool fEnabled = false;
872	rc = VbglR3GetDisplayChangeRequest(&cx, &cy, &cBits, &iDisplay, &cxOrigin, &cyOrigin, &fEnabled, &fChangeOrigin,
873	true /fAck/);
874	if (RT_SUCCESS(rc))
875	{
876	/* Try to set the requested video mode. Repeat until it is successful or is rejected by the driver. */
877	LogFlowFunc(("DisplayChangeReqEx parameters iDisplay=%d x cx=%d x cy=%d x cBits=%d x SecondayMonEnb=%d x NewOriginX=%d x NewOriginY=%d x ChangeOrigin=%d\n",
878	iDisplay, cx, cy, cBits, fEnabled, cxOrigin, cyOrigin, fChangeOrigin));
879
880	doResize(pCtx,
881	iDisplay,
882	cx,
883	cy,
884	cBits,
885	fEnabled,
886	cxOrigin,
887	cyOrigin,
888	fChangeOrigin);
889	}
890
891	return rc;
892	}
893
894	/**
895	* Thread function to wait for and process display change requests.
896	*/
897	static DECLCALLBACK(int) VBoxDisplayWorker(void pvInstance, bool volatile pfShutdown)
898	{
899	AssertPtr(pvInstance);
900	PVBOXDISPLAYCONTEXT pCtx = (PVBOXDISPLAYCONTEXT)pvInstance;
901	AssertPtr(pCtx->pEnv);
902	LogFlowFunc(("pvInstance=%p\n", pvInstance));
903
904	/*
905	* Tell the control thread that it can continue
906	* spawning services.
907	*/
908	RTThreadUserSignal(RTThreadSelf());
909
910	int rc = VbglR3CtlFilterMask(VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED, 0 /fNot/);
911	if (RT_FAILURE(rc))
912	{
913	LogFlowFunc(("VbglR3CtlFilterMask(mask,0): %Rrc\n", rc));
914	return rc;
915	}
916
917	PostMessage(g_hwndToolWindow, WM_VBOX_GRAPHICS_SUPPORTED, 0, 0);
918
919	VBoxDispIfResizeStarted(&pCtx->pEnv->dispIf);
920
921	for (;;)
922	{
923	/*
924	* Wait for a display change event, checking for shutdown both before and after.
925	*/
926	if (*pfShutdown)
927	{
928	rc = VINF_SUCCESS;
929	break;
930	}
931
932	uint32_t fEvents = 0;
933	rc = VbglR3WaitEvent(VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED, 1000 /ms/, &fEvents);
934
935	if (*pfShutdown)
936	{
937	rc = VINF_SUCCESS;
938	break;
939	}
940
941	if (RT_SUCCESS(rc))
942	{
943	if (fEvents & VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST)
944	DisplayChangeRequestHandler(pCtx);
945
946	if (fEvents & VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED)
947	hlpReloadCursor();
948	}
949	else
950	{
951	// Checking once a second whether or not WM_DISPLAYCHANGED happened.
952	if (ASMAtomicXchgU32(&g_fGuestDisplaysChanged, 0))
953	{
954	// XPDM driver has VBoxDispDrvNotify to receive such a notifications
955	if (pCtx->pEnv->dispIf.enmMode >= VBOXDISPIF_MODE_WDDM)
956	{
957	VBOXDISPIFESCAPE EscapeHdr = { 0 };
958	EscapeHdr.escapeCode = VBOXESC_GUEST_DISPLAYCHANGED;
959
960	DWORD err = VBoxDispIfEscapeInOut(&pCtx->pEnv->dispIf, &EscapeHdr, 0);
961	LogFlowFunc(("VBoxDispIfEscapeInOut returned %d\n", err)); NOREF(err);
962	}
963	}
964
965	/* sleep a bit to not eat too much CPU in case the above call always fails */
966	if (rc != VERR_TIMEOUT)
967	RTThreadSleep(10);
968	}
969	}
970
971	/*
972	* Remove event filter and graphics capability report.
973	*/
974	int rc2 = VbglR3CtlFilterMask(0 /fOr/, VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST \| VMMDEV_EVENT_MOUSE_CAPABILITIES_CHANGED /fNot/);
975	if (RT_FAILURE(rc2))
976	LogFlowFunc(("VbglR3CtlFilterMask failed: %Rrc\n", rc2));
977	PostMessage(g_hwndToolWindow, WM_VBOX_GRAPHICS_UNSUPPORTED, 0, 0);
978
979	LogFlowFuncLeaveRC(rc);
980	return rc;
981	}
982
983	/**
984	* The service description.
985	*/
986	VBOXSERVICEDESC g_SvcDescDisplay =
987	{
988	/* pszName. */
989	"display",
990	/* pszDescription. */
991	"Display Notifications",
992	/* methods */
993	VBoxDisplayInit,
994	VBoxDisplayWorker,
995	NULL /* pfnStop */,
996	VBoxDisplayDestroy
997	};
998

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source: vbox/trunk/src/VBox/Additions/WINNT/VBoxTray/VBoxDisplay.cpp@ 85800

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