/** @file * * VBoxSeamless - Display notifications * */ /* * Copyright (C) 2006-2007 Sun Microsystems, Inc. * * This file is part of VirtualBox Open Source Edition (OSE), as * available from http://www.virtualbox.org. This file is free software; * you can redistribute it and/or modify it under the terms of the GNU * General Public License (GPL) as published by the Free Software * Foundation, in version 2 as it comes in the "COPYING" file of the * VirtualBox OSE distribution. VirtualBox OSE is distributed in the * hope that it will be useful, but WITHOUT ANY WARRANTY of any kind. * * Please contact Sun Microsystems, Inc., 4150 Network Circle, Santa * Clara, CA 95054 USA or visit http://www.sun.com if you need * additional information or have any questions. */ #define _WIN32_WINNT 0x0500 #include #include "VBoxService.h" #include "VBoxSeamless.h" #include #include #include #include #include "helpers.h" #include typedef struct _VBOXDISPLAYCONTEXT { const VBOXSERVICEENV *pEnv; /* ChangeDisplaySettingsEx does not exist in NT. ResizeDisplayDevice uses the function. */ LONG (WINAPI * pfnChangeDisplaySettingsEx)(LPCTSTR lpszDeviceName, LPDEVMODE lpDevMode, HWND hwnd, DWORD dwflags, LPVOID lParam); /* EnumDisplayDevices does not exist in NT. isVBoxDisplayDriverActive et al. are using these functions. */ BOOL (WINAPI * pfnEnumDisplayDevices)(IN LPCSTR lpDevice, IN DWORD iDevNum, OUT PDISPLAY_DEVICEA lpDisplayDevice, IN DWORD dwFlags); } VBOXDISPLAYCONTEXT; static VBOXDISPLAYCONTEXT gCtx = {0}; int VBoxDisplayInit(const VBOXSERVICEENV *pEnv, void **ppInstance, bool *pfStartThread) { OSVERSIONINFO OSinfo; OSinfo.dwOSVersionInfoSize = sizeof (OSinfo); GetVersionEx (&OSinfo); HMODULE hUser = GetModuleHandle("USER32"); gCtx.pEnv = pEnv; if (NULL == hUser) { dprintf(("VBoxService: Could not get module handle of USER32.DLL!\n")); return VERR_NOT_IMPLEMENTED; } else if (OSinfo.dwMajorVersion >= 5) /* APIs available only on W2K and up! */ { *(uintptr_t *)&gCtx.pfnChangeDisplaySettingsEx = (uintptr_t)GetProcAddress(hUser, "ChangeDisplaySettingsExA"); dprintf(("VBoxService: pfnChangeDisplaySettingsEx = %p\n", gCtx.pfnChangeDisplaySettingsEx)); *(uintptr_t *)&gCtx.pfnEnumDisplayDevices = (uintptr_t)GetProcAddress(hUser, "EnumDisplayDevicesA"); dprintf(("VBoxService: pfnEnumDisplayDevices = %p\n", gCtx.pfnEnumDisplayDevices)); } else if (OSinfo.dwMajorVersion <= 4) /* Windows NT 4.0 */ { /* Nothing to do here yet */ } else /* Unsupported platform */ { dprintf(("VBoxService: Warning, display for platform not handled yet!\n")); return VERR_NOT_IMPLEMENTED; } dprintf(("VBoxService: Display init successful.\n")); *pfStartThread = true; *ppInstance = (void *)&gCtx; return VINF_SUCCESS; } void VBoxDisplayDestroy (const VBOXSERVICEENV *pEnv, void *pInstance) { return; } static bool isVBoxDisplayDriverActive (VBOXDISPLAYCONTEXT *pCtx) { bool result = false; if( pCtx->pfnEnumDisplayDevices ) { INT devNum = 0; DISPLAY_DEVICE dispDevice; FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0); dispDevice.cb = sizeof(DISPLAY_DEVICE); dprintf(("Checking for active VBox display driver (W2K+)...\n")); while (EnumDisplayDevices(NULL, devNum, &dispDevice, 0)) { dprintf(("DevNum:%d\nName:%s\nString:%s\nID:%s\nKey:%s\nFlags=%08X\n\n", devNum, &dispDevice.DeviceName[0], &dispDevice.DeviceString[0], &dispDevice.DeviceID[0], &dispDevice.DeviceKey[0], dispDevice.StateFlags)); if (dispDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) { dprintf(("Primary device.\n")); if (strcmp(&dispDevice.DeviceString[0], "VirtualBox Graphics Adapter") == 0) result = true; break; } FillMemory(&dispDevice, sizeof(DISPLAY_DEVICE), 0); dispDevice.cb = sizeof(DISPLAY_DEVICE); devNum++; } } else /* This must be NT 4 or something really old, so don't use EnumDisplayDevices() here ... */ { dprintf(("Checking for active VBox display driver (NT or older)...\n")); DEVMODE tempDevMode; ZeroMemory (&tempDevMode, sizeof (tempDevMode)); tempDevMode.dmSize = sizeof(DEVMODE); EnumDisplaySettings(NULL, ENUM_CURRENT_SETTINGS, &tempDevMode); /* Get current display device settings */ /* Check for the short name, because all long stuff would be truncated */ if (strcmp((char*)&tempDevMode.dmDeviceName[0], "VBoxDisp") == 0) result = true; } return result; } /* Returns TRUE to try again. */ static BOOL ResizeDisplayDevice(ULONG Id, DWORD Width, DWORD Height, DWORD BitsPerPixel) { BOOL fModeReset = (Width == 0 && Height == 0 && BitsPerPixel == 0); DISPLAY_DEVICE DisplayDevice; ZeroMemory(&DisplayDevice, sizeof(DisplayDevice)); DisplayDevice.cb = sizeof(DisplayDevice); /* Find out how many display devices the system has */ DWORD NumDevices = 0; DWORD i = 0; while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0)) { dprintf(("[%d] %s\n", i, DisplayDevice.DeviceName)); if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) { dprintf(("Found primary device. err %d\n", GetLastError ())); NumDevices++; } else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER)) { dprintf(("Found secondary device. err %d\n", GetLastError ())); NumDevices++; } ZeroMemory(&DisplayDevice, sizeof(DisplayDevice)); DisplayDevice.cb = sizeof(DisplayDevice); i++; } dprintf(("Found total %d devices. err %d\n", NumDevices, GetLastError ())); if (NumDevices == 0 || Id >= NumDevices) { dprintf(("Requested identifier %d is invalid. err %d\n", Id, GetLastError ())); return FALSE; } DISPLAY_DEVICE *paDisplayDevices = (DISPLAY_DEVICE *)alloca (sizeof (DISPLAY_DEVICE) * NumDevices); DEVMODE *paDeviceModes = (DEVMODE *)alloca (sizeof (DEVMODE) * NumDevices); RECTL *paRects = (RECTL *)alloca (sizeof (RECTL) * NumDevices); /* Fetch information about current devices and modes. */ DWORD DevNum = 0; DWORD DevPrimaryNum = 0; ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE)); DisplayDevice.cb = sizeof(DISPLAY_DEVICE); i = 0; while (EnumDisplayDevices (NULL, i, &DisplayDevice, 0)) { dprintf(("[%d(%d)] %s\n", i, DevNum, DisplayDevice.DeviceName)); BOOL bFetchDevice = FALSE; if (DisplayDevice.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) { dprintf(("Found primary device. err %d\n", GetLastError ())); DevPrimaryNum = DevNum; bFetchDevice = TRUE; } else if (!(DisplayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER)) { dprintf(("Found secondary device. err %d\n", GetLastError ())); bFetchDevice = TRUE; } if (bFetchDevice) { if (DevNum >= NumDevices) { dprintf(("%d >= %d\n", NumDevices, DevNum)); return FALSE; } paDisplayDevices[DevNum] = DisplayDevice; ZeroMemory(&paDeviceModes[DevNum], sizeof(DEVMODE)); paDeviceModes[DevNum].dmSize = sizeof(DEVMODE); if (!EnumDisplaySettings((LPSTR)DisplayDevice.DeviceName, ENUM_REGISTRY_SETTINGS, &paDeviceModes[DevNum])) { dprintf(("EnumDisplaySettings err %d\n", GetLastError ())); return FALSE; } dprintf(("%dx%d at %d,%d\n", paDeviceModes[DevNum].dmPelsWidth, paDeviceModes[DevNum].dmPelsHeight, paDeviceModes[DevNum].dmPosition.x, paDeviceModes[DevNum].dmPosition.y)); paRects[DevNum].left = paDeviceModes[DevNum].dmPosition.x; paRects[DevNum].top = paDeviceModes[DevNum].dmPosition.y; paRects[DevNum].right = paDeviceModes[DevNum].dmPosition.x + paDeviceModes[DevNum].dmPelsWidth; paRects[DevNum].bottom = paDeviceModes[DevNum].dmPosition.y + paDeviceModes[DevNum].dmPelsHeight; DevNum++; } ZeroMemory(&DisplayDevice, sizeof(DISPLAY_DEVICE)); DisplayDevice.cb = sizeof(DISPLAY_DEVICE); i++; } if (Width == 0) { Width = paRects[Id].right - paRects[Id].left; } if (Height == 0) { Height = paRects[Id].bottom - paRects[Id].top; } /* Check whether a mode reset or a change is requested. */ if ( !fModeReset && paRects[Id].right - paRects[Id].left == Width && paRects[Id].bottom - paRects[Id].top == Height && paDeviceModes[Id].dmBitsPerPel == BitsPerPixel) { dprintf(("VBoxDisplayThread : already at desired resolution.\n")); return FALSE; } resizeRect(paRects, NumDevices, DevPrimaryNum, Id, Width, Height); #ifdef dprintf for (i = 0; i < NumDevices; i++) { dprintf(("[%d]: %d,%d %dx%d\n", i, paRects[i].left, paRects[i].top, paRects[i].right - paRects[i].left, paRects[i].bottom - paRects[i].top)); } #endif /* dprintf */ /* Without this, Windows will not ask the miniport for its * mode table but uses an internal cache instead. */ DEVMODE tempDevMode; ZeroMemory (&tempDevMode, sizeof (tempDevMode)); tempDevMode.dmSize = sizeof(DEVMODE); EnumDisplaySettings(NULL, 0xffffff, &tempDevMode); /* Assign the new rectangles to displays. */ for (i = 0; i < NumDevices; i++) { paDeviceModes[i].dmPosition.x = paRects[i].left; paDeviceModes[i].dmPosition.y = paRects[i].top; paDeviceModes[i].dmPelsWidth = paRects[i].right - paRects[i].left; paDeviceModes[i].dmPelsHeight = paRects[i].bottom - paRects[i].top; paDeviceModes[i].dmFields = DM_POSITION | DM_PELSHEIGHT | DM_PELSWIDTH; if ( i == Id && BitsPerPixel != 0) { paDeviceModes[i].dmFields |= DM_BITSPERPEL; paDeviceModes[i].dmBitsPerPel = BitsPerPixel; } dprintf(("calling pfnChangeDisplaySettingsEx %x\n", gCtx.pfnChangeDisplaySettingsEx)); gCtx.pfnChangeDisplaySettingsEx((LPSTR)paDisplayDevices[i].DeviceName, &paDeviceModes[i], NULL, CDS_NORESET | CDS_UPDATEREGISTRY, NULL); dprintf(("ChangeDisplaySettings position err %d\n", GetLastError ())); } /* A second call to ChangeDisplaySettings updates the monitor. */ LONG status = ChangeDisplaySettings(NULL, 0); dprintf(("ChangeDisplaySettings update status %d\n", status)); if (status == DISP_CHANGE_SUCCESSFUL || status == DISP_CHANGE_BADMODE) { /* Successfully set new video mode or our driver can not set the requested mode. Stop trying. */ return FALSE; } /* Retry the request. */ return TRUE; } /** * Thread function to wait for and process display change * requests */ unsigned __stdcall VBoxDisplayThread (void *pInstance) { VBOXDISPLAYCONTEXT *pCtx = (VBOXDISPLAYCONTEXT *)pInstance; HANDLE gVBoxDriver = pCtx->pEnv->hDriver; bool fTerminate = false; VBoxGuestFilterMaskInfo maskInfo; DWORD cbReturned; maskInfo.u32OrMask = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST; maskInfo.u32NotMask = 0; if (DeviceIoControl (gVBoxDriver, IOCTL_VBOXGUEST_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL)) { dprintf(("VBoxDisplayThread : DeviceIOControl(CtlMask - or) succeeded\n")); } else { dprintf(("VBoxDisplayThread : DeviceIOControl(CtlMask) failed, DisplayChangeThread exited\n")); return -1; } do { /* wait for a display change event */ VBoxGuestWaitEventInfo waitEvent; waitEvent.u32TimeoutIn = 1000; waitEvent.u32EventMaskIn = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST; if (DeviceIoControl(gVBoxDriver, IOCTL_VBOXGUEST_WAITEVENT, &waitEvent, sizeof(waitEvent), &waitEvent, sizeof(waitEvent), &cbReturned, NULL)) { dprintf(("VBoxDisplayThread : DeviceIOControl succeded\n")); /* are we supposed to stop? */ if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 0) == WAIT_OBJECT_0) break; dprintf(("VBoxDisplayThread : checking event\n")); /* did we get the right event? */ if (waitEvent.u32EventFlagsOut & VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST) { dprintf(("VBoxDisplayThread : going to get display change information.\n")); /* We got at least one event. Read the requested resolution * and try to set it until success. New events will not be seen * but a new resolution will be read in this poll loop. */ for (;;) { /* get the display change request */ VMMDevDisplayChangeRequest2 displayChangeRequest = {0}; displayChangeRequest.header.size = sizeof(VMMDevDisplayChangeRequest2); displayChangeRequest.header.version = VMMDEV_REQUEST_HEADER_VERSION; displayChangeRequest.header.requestType = VMMDevReq_GetDisplayChangeRequest2; displayChangeRequest.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST; BOOL fDisplayChangeQueried = DeviceIoControl(gVBoxDriver, IOCTL_VBOXGUEST_VMMREQUEST, &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest2), &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest2), &cbReturned, NULL); if (!fDisplayChangeQueried) { /* Try the old version of the request for old VBox hosts. */ displayChangeRequest.header.size = sizeof(VMMDevDisplayChangeRequest); displayChangeRequest.header.version = VMMDEV_REQUEST_HEADER_VERSION; displayChangeRequest.header.requestType = VMMDevReq_GetDisplayChangeRequest; displayChangeRequest.eventAck = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST; fDisplayChangeQueried = DeviceIoControl(gVBoxDriver, IOCTL_VBOXGUEST_VMMREQUEST, &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest), &displayChangeRequest, sizeof(VMMDevDisplayChangeRequest), &cbReturned, NULL); displayChangeRequest.display = 0; } if (fDisplayChangeQueried) { dprintf(("VBoxDisplayThread : VMMDevReq_GetDisplayChangeRequest2: %dx%dx%d at %d\n", displayChangeRequest.xres, displayChangeRequest.yres, displayChangeRequest.bpp, displayChangeRequest.display)); /* Horizontal resolution must be a multiple of 8, round down. */ displayChangeRequest.xres &= 0xfff8; /* * Only try to change video mode if the active display driver is VBox additions. */ if (isVBoxDisplayDriverActive (pCtx)) { dprintf(("VBoxDisplayThread : Display driver is active!\n")); if (pCtx->pfnChangeDisplaySettingsEx != 0) { dprintf(("VBoxDisplayThread : Detected W2K or later.")); /* W2K or later. */ if (!ResizeDisplayDevice(displayChangeRequest.display, displayChangeRequest.xres, displayChangeRequest.yres, displayChangeRequest.bpp)) { break; } } else { dprintf(("VBoxDisplayThread : Detected NT.\n")); /* Single monitor NT. */ DEVMODE devMode; memset (&devMode, 0, sizeof (devMode)); devMode.dmSize = sizeof(DEVMODE); /* get the current screen setup */ if (EnumDisplaySettings(NULL, ENUM_REGISTRY_SETTINGS, &devMode)) { dprintf(("VBoxDisplayThread : Current mode: %dx%dx%d at %d,%d\n", devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel, devMode.dmPosition.x, devMode.dmPosition.y)); /* Check whether a mode reset or a change is requested. */ if (displayChangeRequest.xres || displayChangeRequest.yres || displayChangeRequest.bpp) { /* A change is requested. * Set values which are not to be changed to the current values. */ if (!displayChangeRequest.xres) displayChangeRequest.xres = devMode.dmPelsWidth; if (!displayChangeRequest.yres) displayChangeRequest.yres = devMode.dmPelsHeight; if (!displayChangeRequest.bpp) displayChangeRequest.bpp = devMode.dmBitsPerPel; } else { /* All zero values means a forced mode reset. Do nothing. */ dprintf(("VBoxDisplayThread : Forced mode reset.\n")); } /* Verify that the mode is indeed changed. */ if ( devMode.dmPelsWidth == displayChangeRequest.xres && devMode.dmPelsHeight == displayChangeRequest.yres && devMode.dmBitsPerPel == displayChangeRequest.bpp) { dprintf(("VBoxDisplayThread : already at desired resolution.\n")); break; } // without this, Windows will not ask the miniport for its // mode table but uses an internal cache instead DEVMODE tempDevMode = {0}; tempDevMode.dmSize = sizeof(DEVMODE); EnumDisplaySettings(NULL, 0xffffff, &tempDevMode); /* adjust the values that are supposed to change */ if (displayChangeRequest.xres) devMode.dmPelsWidth = displayChangeRequest.xres; if (displayChangeRequest.yres) devMode.dmPelsHeight = displayChangeRequest.yres; if (displayChangeRequest.bpp) devMode.dmBitsPerPel = displayChangeRequest.bpp; dprintf(("VBoxDisplayThread : setting the new mode %dx%dx%d\n", devMode.dmPelsWidth, devMode.dmPelsHeight, devMode.dmBitsPerPel)); /* set the new mode */ LONG status = ChangeDisplaySettings(&devMode, CDS_UPDATEREGISTRY); if (status != DISP_CHANGE_SUCCESSFUL) { dprintf(("VBoxDisplayThread : error from ChangeDisplaySettings: %d\n", status)); if (status == DISP_CHANGE_BADMODE) { /* Our driver can not set the requested mode. Stop trying. */ break; } } else { /* Successfully set new video mode. */ break; } } else { dprintf(("VBoxDisplayThread : error from EnumDisplaySettings: %d\n", GetLastError ())); break; } } } else { dprintf(("VBoxDisplayThread : vboxDisplayDriver is not active.\n")); } /* Retry the change a bit later. */ /* are we supposed to stop? */ if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 1000) == WAIT_OBJECT_0) { fTerminate = true; break; } } else { dprintf(("VBoxDisplayThread : error from DeviceIoControl IOCTL_VBOXGUEST_VMMREQUEST\n")); /* sleep a bit to not eat too much CPU while retrying */ /* are we supposed to stop? */ if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 50) == WAIT_OBJECT_0) { fTerminate = true; break; } } } } } else { dprintf(("VBoxDisplayThread : error 0 from DeviceIoControl IOCTL_VBOXGUEST_WAITEVENT\n")); /* sleep a bit to not eat too much CPU in case the above call always fails */ if (WaitForSingleObject(pCtx->pEnv->hStopEvent, 10) == WAIT_OBJECT_0) { fTerminate = true; break; } } } while (!fTerminate); maskInfo.u32OrMask = 0; maskInfo.u32NotMask = VMMDEV_EVENT_DISPLAY_CHANGE_REQUEST; if (DeviceIoControl (gVBoxDriver, IOCTL_VBOXGUEST_CTL_FILTER_MASK, &maskInfo, sizeof (maskInfo), NULL, 0, &cbReturned, NULL)) { dprintf(("VBoxDisplayThread : DeviceIOControl(CtlMask - not) succeeded\n")); } else { dprintf(("VBoxDisplayThread : DeviceIOControl(CtlMask) failed\n")); } dprintf(("VBoxDisplayThread : finished display change request thread\n")); return 0; }