453 lines
12 KiB
C++
453 lines
12 KiB
C++
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#include "precomp.h"
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#ifndef DM_POSITION
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#define DM_POSITION 0x00000020L
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#endif
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//
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// OSI.CPP
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// OS Isolation layer, NT version
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//
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// Copyright(c) Microsoft 1997-
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//
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#include <version.h>
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#include <ndcgver.h>
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#include <osi.h>
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#define MLZ_FILE_ZONE ZONE_CORE
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//
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// NT 5.0 app sharing stuff.
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// NOTE:
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// The name for NetMeeting's display driver, s_szNmDD, comes from
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// mnmdd.sys. We have no define for it nor access to the source. DO NOT
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// CHANGE THIS without talking to Andre Vachon. Hopefully, he will perform
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// the same courtesy for us if he changes mnmdd.sys. If not, we can't share
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// anymore. We won't even find our driver to load.
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//
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typedef BOOL (WINAPI * FN_ENUMDD)(LPVOID, DWORD, LPDISPLAY_DEVICE, DWORD);
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static TCHAR s_szNmDD[] = "NetMeeting driver";
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//
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// OSI_Load()
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// This handles our process attach. We figure out if this is NT5 or not
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//
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void OSI_Load(void)
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{
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OSVERSIONINFO osVersion;
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ZeroMemory(&osVersion, sizeof(osVersion));
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osVersion.dwOSVersionInfoSize = sizeof(osVersion);
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GetVersionEx(&osVersion);
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ASSERT(osVersion.dwPlatformId == VER_PLATFORM_WIN32_NT);
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if (osVersion.dwMajorVersion >= 5)
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g_asNT5 = TRUE;
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}
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//
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// OSI_Unload()
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// This handles our process detach. We currently do nothing.
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//
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void OSI_Unload(void)
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{
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return;
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}
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//
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// OSI_InitDriver50()
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//
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// Attemps to dynamically load/unload our display driver for NT 5.0. This is
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// called on the main thread, and if under a service, on the winlogon
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// thread also. It will only succeed on the input focus desktop.
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//
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void OSI_InitDriver50(BOOL fInit)
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{
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DWORD iEnum;
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DISPLAY_DEVICE dd;
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DEVMODE devmode;
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FN_ENUMDD pfnEnumDD;
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DebugEntry(OSI_InitDriver50);
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ASSERT(g_asNT5);
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pfnEnumDD = (FN_ENUMDD)GetProcAddress(GetModuleHandle("USER32.DLL"),
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"EnumDisplayDevicesA");
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if (pfnEnumDD != NULL)
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{
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ZeroMemory(&dd, sizeof(dd));
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dd.cb = sizeof(dd);
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iEnum = 0;
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while (pfnEnumDD(NULL, iEnum++, &dd, 0))
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{
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if ((dd.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER) &&
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!lstrcmpi((LPCSTR)dd.DeviceString, s_szNmDD))
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{
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LONG lResult;
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//
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// There may be multiple monitors, drivers, etc.
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// We have to actually tell the system what bit depth,
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// format, etc. our driver wants just like if we were
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// a real driver. We therefore always ask to get 24bpp
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// format info, no myriad 16bpp and 32bpp formats to deal
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// with anymore.
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//
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// Also, no more 4bpp not VGA nonsense either--just 8 or 24.
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//
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ZeroMemory(&devmode, sizeof(devmode));
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devmode.dmSize = sizeof(devmode);
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devmode.dmFields = DM_POSITION | DM_BITSPERPEL | DM_PELSWIDTH |
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DM_PELSHEIGHT;
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if (fInit)
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{
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//
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// Fill in fields to get driver attached.
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//
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if (g_usrCaptureBPP <= 8)
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g_usrCaptureBPP = 8;
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else
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g_usrCaptureBPP = 24;
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devmode.dmBitsPerPel = g_usrCaptureBPP;
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// devmode.dmPosition is (0, 0), this means "primary"
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devmode.dmPelsWidth = GetSystemMetrics(SM_CXSCREEN);
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devmode.dmPelsHeight = GetSystemMetrics(SM_CYSCREEN);
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}
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//
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// Before we change the display settings in a multimonitor machine, we better move the cursor out of the way
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// If we do not do do we get an extra cursor in the middle of the primary monitor
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//
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::SetCursorPos(-1, -1);
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//
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// This simply changes the state in the registry from
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// attached to unattached, without the system actually
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// reflecting the change. If/when we have multiple
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// listings for our shadow driver, move the CDS(NULL, 0)
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// call outside the loop, and get rid of the break.
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//
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lResult = ChangeDisplaySettingsEx((LPCSTR)dd.DeviceName, &devmode,
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NULL, CDS_UPDATEREGISTRY | CDS_NORESET, NULL);
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if (lResult != DISP_CHANGE_SUCCESSFUL)
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{
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WARNING_OUT(("ChangeDisplaySettingsEx failed, error %d", lResult));
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}
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else
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{
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//
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// This causes Windows to actually go reread the registry and
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// update the current display to reflect the attached items,
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// positions, sizes, and color depths.
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//
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ChangeDisplaySettings(NULL, 0);
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#ifdef _DEBUG
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if (fInit)
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{
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HDC hdc;
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//
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// Create a temp DC based on this driver and make sure
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// the settings matched what we asked for.
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//
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hdc = CreateDC(NULL, (LPCSTR)dd.DeviceName, NULL, NULL);
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if (!hdc)
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{
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WARNING_OUT(("OSI_Init: dynamic display driver load failed"));
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}
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else
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{
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ASSERT(GetDeviceCaps(hdc, HORZRES) == (int)devmode.dmPelsWidth);
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ASSERT(GetDeviceCaps(hdc, VERTRES) == (int)devmode.dmPelsHeight);
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ASSERT(GetDeviceCaps(hdc, BITSPIXEL) * GetDeviceCaps(hdc, PLANES) ==
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(int)g_usrCaptureBPP);
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DeleteDC(hdc);
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}
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}
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#endif // _DEBUG
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//
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// Tell MNMHOOK_ the name of our driver so it can talk
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// to it via ExtEscape.
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//
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OSI_SetDriverName(fInit ? (LPCSTR)dd.DeviceName : NULL);
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}
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break;
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}
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}
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}
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DebugExitVOID(OSI_InitDriver50);
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}
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//
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// OSI_Init - see osi.h
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//
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void OSI_Init(void)
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{
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UINT i;
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OSI_INIT_REQUEST requestBuffer;
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DebugEntry(OSI_Init);
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//
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// First, setup up pointer to shared data. This data lives here in NT.
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//
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#ifdef DEBUG
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g_imSharedData.cbSize = sizeof(g_imSharedData);
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#endif
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g_lpimSharedData = &g_imSharedData;
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requestBuffer.result = FALSE;
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requestBuffer.pSharedMemory = NULL;
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requestBuffer.poaData[0] = NULL;
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requestBuffer.poaData[1] = NULL;
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requestBuffer.sbcEnabled = FALSE;
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for (i = 0; i < SBC_NUM_TILE_SIZES; i++)
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{
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ASSERT(!g_asbcShuntBuffers[i]);
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requestBuffer.psbcTileData[i] = NULL;
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}
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//
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// Do this FIRST. On NT5, only threads on the desktop with input
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// can succeed at calling ChangeDisplaySettings. So like other things,
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// we must try to dynamically load/unload our driver on both desks.
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//
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//
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// Create the winlogon desktop event injection helper thread
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// only if we're started as a service. Note that it will try to
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// load display at start too.
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//
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ASSERT(!g_imNTData.imOtherDesktopThread);
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if (g_asOptions & AS_SERVICE)
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{
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WARNING_OUT(("Starting other desktop thread for SERVICE"));
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if (!DCS_StartThread(IMOtherDesktopProc))
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{
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WARNING_OUT(( "Failed to create other desktop IM thread"));
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DC_QUIT;
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}
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}
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//
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// DO THIS ONLY FOR NT5
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// We are going to enumerate all the entries for our shadow driver
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// (currently only one) and attach each to the actual display.
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//
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if (g_asNT5)
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{
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OSI_InitDriver50(TRUE);
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}
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DC_EXIT_POINT:
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g_osiInitialized = OSI_FunctionRequest(OSI_ESC_INIT, (LPOSI_ESCAPE_HEADER)&requestBuffer,
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sizeof(requestBuffer));
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if (!g_osiInitialized)
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{
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WARNING_OUT(("OSI_ESC_INIT: display driver not present"));
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}
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else
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{
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if (requestBuffer.result)
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{
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g_asCanHost = TRUE;
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//
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// Got shared memory pointers; keep them around
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//
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g_asSharedMemory = (LPSHM_SHARED_MEMORY)requestBuffer.pSharedMemory;
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ASSERT(g_asSharedMemory);
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g_poaData[0] = (LPOA_SHARED_DATA)requestBuffer.poaData[0];
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ASSERT(g_poaData[0]);
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g_poaData[1] = (LPOA_SHARED_DATA)requestBuffer.poaData[1];
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ASSERT(g_poaData[1]);
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g_sbcEnabled = requestBuffer.sbcEnabled;
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if (g_sbcEnabled)
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{
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//
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// Get shunt buffers
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//
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for (i = 0; i < SBC_NUM_TILE_SIZES; i++)
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{
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g_asbcShuntBuffers[i] = (LPSBC_SHUNT_BUFFER)requestBuffer.psbcTileData[i];
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ASSERT(g_asbcShuntBuffers[i]);
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TRACE_OUT(("OSI_Init: sbc shunt buffer %d: entries %08d, bytes 0x%08x",
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i, g_asbcShuntBuffers[i]->numEntries, g_asbcShuntBuffers[i]->numBytes));
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}
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for (i = 0; i < 3; i++)
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{
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g_asbcBitMasks[i] = requestBuffer.aBitmasks[i];
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}
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}
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}
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}
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if (g_asCanHost)
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{
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//
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// Tell HOOK dll (used for control as well as sharing) about our hwnd
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// and stuff. If we are able to host.
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//
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ASSERT(g_asMainWindow);
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ASSERT(g_asHostProp);
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HOOK_Init(g_asMainWindow, g_asHostProp);
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}
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DebugExitVOID(OSI_Init);
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}
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//
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// OSI_Term - see osi.h
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//
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void OSI_Term(void)
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{
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UINT i;
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DebugEntry(OSI_Term);
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//
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// This can be called on multiple threads:
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// * The main DCS thread
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// * The last thread of the process causing us to get a process
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// detach.
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// We call it in the latter case also to make sure we cleanup properly.
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//
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ASSERT(GetCurrentThreadId() == g_asMainThreadId);
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//
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// Kill the other desktop thread if it's around.
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//
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if (g_imNTData.imOtherDesktopThread != 0)
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{
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ASSERT(g_asOptions & AS_SERVICE);
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PostThreadMessage(g_imNTData.imOtherDesktopThread, WM_QUIT, 0, 0);
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while (g_imNTData.imOtherDesktopThread)
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{
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WARNING_OUT(("OSI_Term: waiting for other desktop thread to exit"));
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Sleep(1);
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}
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}
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if (g_osiInitialized)
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{
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OSI_TERM_REQUEST requestBuffer;
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g_osiInitialized = FALSE;
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//
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// We call the term routine only if the driver is actually loaded
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// (as opposed to whether something went wrong when trying to setup
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// for hosting) so that we will cleanup if something went wrong in
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// the middle.
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//
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OSI_FunctionRequest(OSI_ESC_TERM, (LPOSI_ESCAPE_HEADER)&requestBuffer,
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sizeof(requestBuffer));
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}
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//
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// ONLY DO THIS FOR NT5
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// We need to undo all the work we did at init time to attach our
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// driver(s) to the display, and detach them. Again, enumerate the
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// registry entries and look for ours.
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//
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//
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if (g_asNT5)
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{
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OSI_InitDriver50(FALSE);
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}
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// Clear our shared memory variables
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for (i = 0; i < 3; i++)
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{
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g_asbcBitMasks[i] = 0;
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}
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|
||
|
|
for (i = 0; i < SBC_NUM_TILE_SIZES; i++)
|
||
|
|
{
|
||
|
|
g_asbcShuntBuffers[i] = NULL;
|
||
|
|
}
|
||
|
|
g_sbcEnabled = FALSE;
|
||
|
|
|
||
|
|
g_asSharedMemory = NULL;
|
||
|
|
g_poaData[0] = NULL;
|
||
|
|
g_poaData[1] = NULL;
|
||
|
|
|
||
|
|
g_asCanHost = FALSE;
|
||
|
|
|
||
|
|
g_lpimSharedData = NULL;
|
||
|
|
|
||
|
|
DebugExitVOID(OSI_Term);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
VOID OSI_RepaintDesktop(void)
|
||
|
|
{
|
||
|
|
DebugEntry(OSI_RepaintDesktop);
|
||
|
|
|
||
|
|
// If this does not appear to be a window it may be a window on the
|
||
|
|
// winlogon desktop, so we need to get the proxy thread to repaint it
|
||
|
|
if ( g_imNTData.imOtherDesktopThread )
|
||
|
|
{
|
||
|
|
PostThreadMessage(g_imNTData.imOtherDesktopThread,
|
||
|
|
OSI_WM_DESKTOPREPAINT, 0, 0);
|
||
|
|
}
|
||
|
|
DebugExitVOID(OSI_RepaintDesktop);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
VOID OSI_SetGUIEffects(BOOL fOff)
|
||
|
|
{
|
||
|
|
DebugEntry(OSI_SetGUIEffects);
|
||
|
|
|
||
|
|
if (g_imNTData.imOtherDesktopThread)
|
||
|
|
{
|
||
|
|
PostThreadMessage(g_imNTData.imOtherDesktopThread,
|
||
|
|
OSI_WM_SETGUIEFFECTS, fOff, 0);
|
||
|
|
}
|
||
|
|
|
||
|
|
DebugExitVOID(OSI_SetGUIEffects);
|
||
|
|
}
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|
||
|
|
|