boinc/client/win/win_screensaver.cpp

// Berkeley Open Infrastructure for Network Computing
// http://boinc.berkeley.edu
// Copyright (C) 2005 University of California
//
// This is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation;
// either version 2.1 of the License, or (at your option) any later version.
//
// This software is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License for more details.
//
// To view the GNU Lesser General Public License visit
// http://www.gnu.org/copyleft/lesser.html
// or write to the Free Software Foundation, Inc.,
// 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
// 
// Contributor(s):
//     DirectX 8.1 Screen Saver Framework from Microsoft.
//     Microsoft Knowledge Base Article - 79212
//

#include "boinc_win.h"

#include <windowsx.h>
#include <mmsystem.h>
#include <regstr.h>
#include <shlobj.h>
#define COMPILE_MULTIMON_STUBS
#include <multimon.h>
#include <strsafe.h>

#include "diagnostics.h"
#include "exception.h"
#include "boinc_ss.h"
#include "win_screensaver.h"
#include "win_util.h"


// Define the stuff needed to actually do a set foreground window on
//   Windows 2000 or later machines.
//
#ifndef BSF_ALLOWSFW
#define BSF_ALLOWSFW                    0x00000080
#endif

const UINT WM_BOINCSFW = RegisterWindowMessage(TEXT("BOINCSetForegroundWindow"));

static CScreensaver* gs_pScreensaver = NULL;

INT WINAPI WinMain(
    HINSTANCE hInstance, HINSTANCE hPrevInstance, LPSTR lpCmdLine, int nCmdShow
) {
    HRESULT      hr;
    int          retval;
    WSADATA      wsdata;
    CScreensaver BOINCSS;

#ifdef _DEBUG
    // Initialize Diagnostics when compiled for debug
    retval = boinc_init_diagnostics (
        BOINC_DIAG_DUMPCALLSTACKENABLED | 
        BOINC_DIAG_HEAPCHECKENABLED |
        BOINC_DIAG_MEMORYLEAKCHECKENABLED |
        BOINC_DIAG_ARCHIVESTDERR |
        BOINC_DIAG_REDIRECTSTDERR |
        BOINC_DIAG_TRACETOSTDERR
   );
    if (retval) {
        BOINCTRACE("WinMain - BOINC Screensaver Diagnostic Error '%d'\n", retval);
        MessageBox(NULL, NULL, "BOINC Screensaver Diagnostic Error", MB_OK);
    }
#endif

    retval = WSAStartup(MAKEWORD(1, 1), &wsdata);
    if (retval) {
        BOINCTRACE("WinMain - Winsock Initialization Failure '%d'\n", retval);
        return retval;
    }

    if (FAILED(hr = BOINCSS.Create(hInstance))) {
        BOINCSS.DisplayErrorMsg(hr);
        WSACleanup();
        return 0;
    }
    retval = BOINCSS.Run();
    WSACleanup();
    return retval;
}


CScreensaver::CScreensaver() {
    gs_pScreensaver = this;

    m_bCheckingSaverPassword = FALSE;
    m_bIs9x = FALSE;
    m_dwSaverMouseMoveCount = 0;
    m_hWnd = NULL;
    m_hWndParent = NULL;
    m_hPasswordDLL = NULL;
    m_VerifySaverPassword = NULL;
    
    m_bAllScreensSame = FALSE;
    m_bWindowed = FALSE;
    m_bWaitForInputIdle = FALSE;

    m_bErrorMode = FALSE;
    m_hrError = S_OK;
    m_szError[0] = _T('\0');

    LoadString(NULL, IDS_DESCRIPTION, m_strWindowTitle, 200);

	m_bPaintingInitialized = FALSE;
	m_bCoreNotified = FALSE;
    m_bResetCoreState = TRUE;
    m_iStatus = 0;
    m_dwBlankScreen = 0;
    m_dwBlankTime = 0;

    m_bBOINCConfigChecked = FALSE;
    m_bBOINCStartupConfigured = FALSE;

	ZeroMemory(m_Monitors, sizeof(m_Monitors));
    m_dwNumMonitors = 0;
}


// Have the client program call this function before calling Run().
//
HRESULT CScreensaver::Create(HINSTANCE hInstance) {
    HRESULT hr;
    BOOL    bReturnValue;

    m_hInstance = hInstance;

    // Parse the command line and do the appropriate thing
    m_SaverMode = ParseCommandLine(GetCommandLine());

    // Figure out if we're on Win9x
    OSVERSIONINFO osvi; 
    osvi.dwOSVersionInfoSize = sizeof(osvi);
    GetVersionEx(&osvi);
    m_bIs9x = (osvi.dwPlatformId == VER_PLATFORM_WIN32_WINDOWS);

    // Enumerate Monitors
    EnumMonitors();

    // Retrieve the blank screen flag so we can determine if we are
    // suppose to actually blank the screen at some point.
	bReturnValue = UtilGetRegKey(REG_BLANK_NAME, m_dwBlankScreen);
    BOINCTRACE("CScreensaver::Create - Get Reg Key REG_BLANK_NAME return value '%d'\n", bReturnValue);
	if (bReturnValue != 0) m_dwBlankScreen = 0;

    // Retrieve the blank screen timeout
	// make sure you check return value of registry queries
	// in case the item in question doesn't happen to exist.
	bReturnValue = UtilGetRegKey(REG_BLANK_TIME, m_dwBlankTime);
    BOINCTRACE("CScreensaver::Create - Get Reg Key REG_BLANK_TIME return value '%d'\n", bReturnValue);
	if (bReturnValue != 0) m_dwBlankTime = 5;

    // Save the value back to the registry in case this is the first
    // execution and so we need the default value later.
	bReturnValue = UtilSetRegKey(REG_BLANK_NAME, m_dwBlankScreen);
    BOINCTRACE("CScreensaver::Create - Set Reg Key REG_BLANK_NAME return value '%d'\n", bReturnValue);

	bReturnValue = UtilSetRegKey(REG_BLANK_TIME, m_dwBlankTime);
    BOINCTRACE("CScreensaver::Create - Set Reg Key REG_BLANK_TIME return value '%d'\n", bReturnValue);

    // Calculate the estimated blank time by adding the current time
    //   and and the user specified time which is in minutes
    m_dwBlankTime = time(0) + (m_dwBlankTime * 60);

    // Create the infrastructure mutexes so we can properly aquire them to report
    //   errors
    if (!CreateInfrastructureMutexes()) {
        return E_FAIL;
    }

    // Create the screen saver window(s)
    if (m_SaverMode == sm_preview || 
        m_SaverMode == sm_test    || 
        m_SaverMode == sm_full
    ) {
        if (FAILED(hr = CreateSaverWindow())) {
            SetError(TRUE, hr);
        }
    }

    if (m_SaverMode == sm_preview) {
        // In preview mode, "pause" (enter a limited message loop) briefly 
        // before proceeding, so the display control panel knows to update itself.
        m_bWaitForInputIdle = TRUE;

        // Post a message to mark the end of the initial group of window messages
        PostMessage(m_hWnd, WM_USER, 0, 0);

        MSG msg;
        while(m_bWaitForInputIdle) {
            // If GetMessage returns FALSE, it's quitting time.
            if (!GetMessage(&msg, m_hWnd, 0, 0)) {
                // Post the quit message to handle it later
                PostQuitMessage(0);
                break;
            }

            TranslateMessage(&msg);
            DispatchMessage(&msg);
        }
    }

    return S_OK;
}




// Starts main execution of the screen saver.
//
INT CScreensaver::Run() {
    HRESULT hr;

    // Create the data management thread to talk with the daemon
    if (!CreateDataManagementThread()) {
        return E_FAIL;
    }

    // Parse the command line and do the appropriate thing
    switch (m_SaverMode) {
    case sm_config:
        if (m_bErrorMode) {
            DisplayErrorMsg(m_hrError);
        } else {
            DoConfig();
        }
        break;
        
    case sm_preview:
    case sm_test:
    case sm_full:
        if (FAILED(hr = DoSaver())) {
            DisplayErrorMsg(hr);
        }
        break;
        
    case sm_passwordchange:
        ChangePassword();
        break;
    }


    // Create the data management thread to talk with the daemon
    //
    if (!DestoryDataManagementThread()) {
        return E_FAIL;
    }

    return 0;
}




// Displays error messages in a message box
//
HRESULT CScreensaver::DisplayErrorMsg(HRESULT hr) {
    TCHAR strMsg[512];

    GetTextForError(hr, strMsg, 512);

    MessageBox(m_hWnd, strMsg, m_strWindowTitle, MB_ICONERROR | MB_OK);

    return hr;
}




// Interpret command-line parameters passed to this app.
//
SaverMode CScreensaver::ParseCommandLine(TCHAR* pstrCommandLine) {
    m_hWndParent = NULL;

	BOINCTRACE("ParseCommandLine: '%s'\n", pstrCommandLine);

    // Skip the first part of the command line, which is the full path 
    // to the exe.  If it contains spaces, it will be contained in quotes.
    if (*pstrCommandLine == _T('\"')) {
        pstrCommandLine++;
        while (*pstrCommandLine != _T('\0') && *pstrCommandLine != _T('\"')) {
            pstrCommandLine++;
        }
        if (*pstrCommandLine == _T('\"')) {
            pstrCommandLine++;
        }
    } else {
        while (*pstrCommandLine != _T('\0') && *pstrCommandLine != _T(' ')) {
            pstrCommandLine++;
        }
        if (*pstrCommandLine == _T(' ')) {
            pstrCommandLine++;
        }
    }

    // Skip along to the first option delimiter "/" or "-"
    while (*pstrCommandLine != _T('\0') && *pstrCommandLine != _T('/') && *pstrCommandLine != _T('-')) {
        pstrCommandLine++;
    }

    // If there wasn't one, then must be config mode
    if (*pstrCommandLine == _T('\0')) {
        return sm_config;
    }

    // Otherwise see what the option was
    switch (*(++pstrCommandLine)) {
        case 'c':
        case 'C':
            pstrCommandLine++;
            while (*pstrCommandLine && !isdigit(*pstrCommandLine)) {
                pstrCommandLine++;
            }
            if (isdigit(*pstrCommandLine)) {
#ifdef _WIN64
                m_hWndParent = HWND(_atoi64(pstrCommandLine));
#else
                m_hWndParent = HWND(_ttol(pstrCommandLine));
#endif
            } else {
                m_hWndParent = NULL;
            }
            return sm_config;

        case 't':
        case 'T':
            return sm_test;

        case 'p':
        case 'P':
            // Preview-mode, so option is followed by the parent HWND in decimal
            pstrCommandLine++;
            while (*pstrCommandLine && !isdigit(*pstrCommandLine)) {
                pstrCommandLine++;
            }
            if (isdigit(*pstrCommandLine)) {
#ifdef _WIN64
                m_hWndParent = HWND(_atoi64(pstrCommandLine));
#else
                m_hWndParent = HWND(_ttol(pstrCommandLine));
#endif
            }
            return sm_preview;

        case 'a':
        case 'A':
            // Password change mode, so option is followed by parent HWND in decimal
            pstrCommandLine++;
            while (*pstrCommandLine && !isdigit(*pstrCommandLine)) {
                pstrCommandLine++;
            }
            if (isdigit(*pstrCommandLine)) {
#ifdef _WIN64
                m_hWndParent = HWND(_atoi64(pstrCommandLine));
#else
                m_hWndParent = HWND(_ttol(pstrCommandLine));
#endif
            }
            return sm_passwordchange;

        default:
            // All other options => run the screensaver (typically this is "/s")
            return sm_full;
    }
}




// Determine HMONITOR, desktop rect, and other info for each monitor.  
//       Note that EnumDisplayDevices enumerates monitors in the order 
//       indicated on the Settings page of the Display control panel, which 
//       is the order we want to list monitors in, as opposed to the order 
//       used by D3D's GetAdapterInfo.
//
VOID CScreensaver::EnumMonitors(VOID) {
    DWORD iDevice = 0;
    DISPLAY_DEVICE_FULL dispdev;
    DISPLAY_DEVICE_FULL dispdev2;
    DEVMODE devmode;
    dispdev.cb = sizeof(dispdev);
    dispdev2.cb = sizeof(dispdev2);
    devmode.dmSize = sizeof(devmode);
    devmode.dmDriverExtra = 0;
    INTERNALMONITORINFO* pMonitorInfoNew;
    while(EnumDisplayDevices(NULL, iDevice, (DISPLAY_DEVICE*)&dispdev, 0)) {
        // Ignore NetMeeting's mirrored displays
        if ((dispdev.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER) == 0) {
            // To get monitor info for a display device, call EnumDisplayDevices
            // a second time, passing dispdev.DeviceName (from the first call) as
            // the first parameter.
            EnumDisplayDevices(dispdev.DeviceName, 0, (DISPLAY_DEVICE*)&dispdev2, 0);

            pMonitorInfoNew = &m_Monitors[m_dwNumMonitors];
            ZeroMemory(pMonitorInfoNew, sizeof(INTERNALMONITORINFO));
            StringCchCopy(pMonitorInfoNew->strDeviceName, 128, dispdev.DeviceString);
            StringCchCopy(pMonitorInfoNew->strMonitorName, 128, dispdev2.DeviceString);
            
            if (dispdev.StateFlags & DISPLAY_DEVICE_ATTACHED_TO_DESKTOP) {
                EnumDisplaySettings(dispdev.DeviceName, ENUM_CURRENT_SETTINGS, &devmode);
                if (dispdev.StateFlags & DISPLAY_DEVICE_PRIMARY_DEVICE) {
                    // For some reason devmode.dmPosition is not always (0, 0)
                    // for the primary display, so force it.
                    pMonitorInfoNew->rcScreen.left = 0;
                    pMonitorInfoNew->rcScreen.top = 0;
                } else {
                    pMonitorInfoNew->rcScreen.left = devmode.dmPosition.x;
                    pMonitorInfoNew->rcScreen.top = devmode.dmPosition.y;
                }
                pMonitorInfoNew->rcScreen.right = pMonitorInfoNew->rcScreen.left + devmode.dmPelsWidth;
                pMonitorInfoNew->rcScreen.bottom = pMonitorInfoNew->rcScreen.top + devmode.dmPelsHeight;
                pMonitorInfoNew->hMonitor = MonitorFromRect(&pMonitorInfoNew->rcScreen, MONITOR_DEFAULTTONULL);
            }
            m_dwNumMonitors++;
            if (m_dwNumMonitors == MAX_DISPLAYS) {
                break;
            }
        }
        iDevice++;
    }
}




// arguments:	name: name of key, keyval: where to store value of key
// returns:		int indicating error
// function:	reads string value in specified key
//
int CScreensaver::UtilSetRegKey(LPCTSTR name, DWORD value) {
	LONG error;
	HKEY boinc_key;

	if (m_bIs9x) {
		error = RegCreateKeyEx(
            HKEY_LOCAL_MACHINE, 
            _T("SOFTWARE\\Space Sciences Laboratory, U.C. Berkeley\\BOINC Screensaver"),  
			0,
            NULL,
            REG_OPTION_NON_VOLATILE,
            KEY_READ | KEY_WRITE,
            NULL,
            &boinc_key,
            NULL
        );
		if (error != ERROR_SUCCESS) return -1;
	} else {
		error = RegCreateKeyEx(
            HKEY_CURRENT_USER,
            _T("SOFTWARE\\Space Sciences Laboratory, U.C. Berkeley\\BOINC Screensaver"),  
			0,
            NULL,
            REG_OPTION_NON_VOLATILE,
            KEY_READ | KEY_WRITE,
            NULL,
            &boinc_key,
            NULL
        );
		if (error != ERROR_SUCCESS) return -1;
	}

	error = RegSetValueEx(boinc_key, name, 0, REG_DWORD, (CONST BYTE *)&value, 4);

	RegCloseKey(boinc_key);

	return 0;
}




// arguments:	name: name of key, keyval: where to store value of key
// returns:		int indicating error
// function:	reads string value in specified key
//
int CScreensaver::UtilGetRegKey(LPCTSTR name, DWORD &keyval) {
	LONG  error;
	DWORD type = REG_DWORD;
	DWORD size = sizeof(DWORD);
	DWORD value;
	HKEY  boinc_key;

	if (m_bIs9x) {
		error = RegOpenKeyEx(
            HKEY_LOCAL_MACHINE, 
            _T("SOFTWARE\\Space Sciences Laboratory, U.C. Berkeley\\BOINC Screensaver"),  
			0, 
            KEY_ALL_ACCESS,
            &boinc_key
        );
		if (error != ERROR_SUCCESS) return -1;
	} else {
		error = RegOpenKeyEx(
            HKEY_CURRENT_USER,
            _T("SOFTWARE\\Space Sciences Laboratory, U.C. Berkeley\\BOINC Screensaver"),  
			0,
            KEY_ALL_ACCESS,
            &boinc_key
        );
		if (error != ERROR_SUCCESS) return -1;
	}

	error = RegQueryValueEx(boinc_key, name, NULL, &type, (BYTE *)&value, &size);

	keyval = value;

	RegCloseKey(boinc_key);

	if (error != ERROR_SUCCESS) return -1;

	return 0;
}




// arguments:	name: name of key, str: value of string to store
//				if str is empty, attepts to delete the key
// returns:		int indicating error
// function:	sets string value in specified key in windows startup dir
//
int CScreensaver::UtilGetRegStartupStr(LPCTSTR name, LPTSTR str) {
	LONG error;
	DWORD type = REG_SZ;
	DWORD size = 128;
	HKEY boinc_key;

	*str = 0;

	if (m_bIs9x) {
		error = RegOpenKeyEx(
            HKEY_LOCAL_MACHINE, 
            _T("Software\\Microsoft\\Windows\\CurrentVersion\\Run"),
			0, 
            KEY_ALL_ACCESS,
            &boinc_key
        );
		if (error != ERROR_SUCCESS) return -1;
	} else {
		error = RegOpenKeyEx(
            HKEY_CURRENT_USER, 
            _T("Software\\Microsoft\\Windows\\CurrentVersion\\Run"),
			0, 
            KEY_ALL_ACCESS, 
            &boinc_key
        );
		if (error != ERROR_SUCCESS) return -1;
	}

	error = RegQueryValueEx(boinc_key, name, NULL, &type, (BYTE*)str, &size);

	RegCloseKey(boinc_key);

	if (error != ERROR_SUCCESS) return -1;

	return ERROR_SUCCESS;
}




// Determine if BOINC is configured to automatically start at logon/startup.
//

// Define dynamically linked to function
typedef HRESULT (STDAPICALLTYPE* MYSHGETFOLDERPATH)(HWND hwnd, int csidl, HANDLE hToken, DWORD dwFlags, LPSTR pszPath);

BOOL CScreensaver::IsConfigStartupBOINC() {
	BOOL				bRetVal;
	BOOL				bCheckFileExists;
	TCHAR				szBuffer[MAX_PATH];
	HANDLE				hFileHandle;
    HMODULE				hShell32;
	MYSHGETFOLDERPATH	pfnMySHGetFolderPath = NULL;


	// Lets set the default value to FALSE
	bRetVal = FALSE;

	// Attempt to link to dynamic function if it exists
    hShell32 = LoadLibrary(_T("SHELL32.DLL"));
	if (NULL != hShell32)
		pfnMySHGetFolderPath = (MYSHGETFOLDERPATH) GetProcAddress(hShell32, _T("SHGetFolderPathA"));


	// Now lets begin looking in the registry
	if (ERROR_SUCCESS == UtilGetRegStartupStr(REG_STARTUP_NAME, szBuffer)) {
		bRetVal = TRUE;
	} else {
		// It could be in the global startup group
		ZeroMemory(szBuffer, sizeof(szBuffer));
		bCheckFileExists = FALSE;
		if (NULL != pfnMySHGetFolderPath) {
			if (SUCCEEDED((pfnMySHGetFolderPath)(NULL, CSIDL_STARTUP|CSIDL_FLAG_CREATE, NULL, SHGFP_TYPE_CURRENT, szBuffer))) {
				BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: pfnMySHGetFolderPath - CSIDL_STARTUP - '%s'\n"), szBuffer);
				if (SUCCEEDED(StringCchCatN(szBuffer, sizeof(szBuffer), BOINC_SHORTCUT_NAME, sizeof(BOINC_SHORTCUT_NAME)))) {
					BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: Final pfnMySHGetFolderPath - CSIDL_STARTUP - '%s'\n"), szBuffer);
					bCheckFileExists = TRUE;
				} else {
					BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: FAILED pfnMySHGetFolderPath - CSIDL_STARTUP Append Operation\n"));
				}
			} else {
				BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: FAILED pfnMySHGetFolderPath - CSIDL_STARTUP\n"));
			}
		}


		if (bCheckFileExists) {
			hFileHandle = CreateFile(
				szBuffer,
				GENERIC_READ,
				FILE_SHARE_READ,
				NULL,
				OPEN_EXISTING,
				FILE_ATTRIBUTE_NORMAL,
				NULL);

			if (INVALID_HANDLE_VALUE != hFileHandle) {
				BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: CreateFile returned a valid handle '%d'\n"), hFileHandle);
				CloseHandle(hFileHandle);
				bRetVal = TRUE;
			} else {
				BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: CreateFile returned INVALID_HANDLE_VALUE - GetLastError() '%d'\n"), GetLastError());

				// It could be in the global startup group
        		ZeroMemory(szBuffer, sizeof(szBuffer));
				bCheckFileExists = FALSE;
				if (NULL != pfnMySHGetFolderPath) {
					if (SUCCEEDED((pfnMySHGetFolderPath)(NULL, CSIDL_COMMON_STARTUP|CSIDL_FLAG_CREATE, NULL, SHGFP_TYPE_CURRENT, szBuffer))) {
						BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: pfnMySHGetFolderPath - CSIDL_COMMON_STARTUP - '%s'\n"), szBuffer);
						if (SUCCEEDED(StringCchCatN(szBuffer, sizeof(szBuffer), BOINC_SHORTCUT_NAME, sizeof(BOINC_SHORTCUT_NAME)))) {
							BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: Final pfnMySHGetFolderPath - CSIDL_COMMON_STARTUP - '%s'\n"), szBuffer);
							bCheckFileExists = TRUE;
						} else {
							BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: FAILED pfnMySHGetFolderPath - CSIDL_COMMON_STARTUP Append Operation\n"));
						}
					} else {
						BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: FAILED pfnMySHGetFolderPath - CSIDL_COMMON_STARTUP\n"));
					}
				}


				if (bCheckFileExists) {
					hFileHandle = CreateFile(
						szBuffer,
						GENERIC_READ,
						FILE_SHARE_READ,
						NULL,
						OPEN_EXISTING,
						FILE_ATTRIBUTE_NORMAL,
						NULL);

					if (INVALID_HANDLE_VALUE != hFileHandle) {
						BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: CreateFile returned a valid handle '%d'\n"), hFileHandle);
						CloseHandle(hFileHandle);
						bRetVal = TRUE;
					} else {
						BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: CreateFile returned INVALID_HANDLE_VALUE - GetLastError() '%d'\n"), GetLastError());
					}
				}
			}
		}
	}

	// Free the dynamically linked to library
	FreeLibrary(hShell32);

	BOINCTRACE(_T("CScreensaver::IsConfigStartupBOINC: Returning '%d'\n"), bRetVal);
	return bRetVal;
}

// Desc: Create the infrastructure for thread safe acccess to the infrastructure
//       layer of the screen saver.
//
BOOL CScreensaver::CreateInfrastructureMutexes() {
    m_hErrorManagementMutex = CreateMutex(NULL, FALSE, NULL);
    if (NULL == m_hErrorManagementMutex) {
    	BOINCTRACE(_T("CScreensaver::CreateInfrastructureMutexes: Failed to create m_hErrorManagementMutex '%d'\n"), GetLastError());
        return FALSE;
    }
    return TRUE;
}

// Provide a thread-safe implementation for retrieving the current
//       error condition.
//
BOOL CScreensaver::GetError(
    BOOL& bErrorMode, HRESULT& hrError, TCHAR* pszError, size_t iErrorSize
) {
    DWORD dwWaitResult;
    BOOL  bRetVal = FALSE;

    // Request ownership of mutex.
    dwWaitResult = WaitForSingleObject(
        m_hErrorManagementMutex,   // handle to mutex
        5000L);                    // five-second time-out interval
 
    switch (dwWaitResult) {
        // WAIT_OBJECT_0 - The thread got mutex ownership.
        case WAIT_OBJECT_0:
            bErrorMode = m_bErrorMode;
            hrError = m_hrError;

            if (NULL != pszError) {
                StringCbCopyN(pszError, iErrorSize, m_szError, sizeof(m_szError) * sizeof(TCHAR));
            }

            bRetVal = TRUE;
            break; 

        // WAIT_TIMEOUT - Cannot get mutex ownership due to time-out.
        // WAIT_ABANDONED - Got ownership of the abandoned mutex object.
        case WAIT_TIMEOUT: 
        case WAIT_ABANDONED: 
            break; 
    }

    ReleaseMutex(m_hErrorManagementMutex);

    return bRetVal; 
}




// Provide a thread-safe implementation for setting the current
//       error condition.  This API should only be called in the data management
//       thread, any other thread may cause a race condition.
//
BOOL CScreensaver::SetError(BOOL bErrorMode, HRESULT hrError) {
    DWORD dwWaitResult;
    BOOL  bRetVal = FALSE;

    // Request ownership of mutex.
    dwWaitResult = WaitForSingleObject(
        m_hErrorManagementMutex,   // handle to mutex
        5000L                // five-second time-out interval
    );
 
    switch (dwWaitResult) {
        // WAIT_OBJECT_0 - The thread got mutex ownership.
        case WAIT_OBJECT_0:
            m_bErrorMode = bErrorMode;
            m_hrError = hrError;

            // Update the error text, including a possible RPC call
            //   to the daemon.
            UpdateErrorBoxText();

            bRetVal = TRUE;
            break; 

        // WAIT_TIMEOUT - Cannot get mutex ownership due to time-out.
        // WAIT_ABANDONED - Got ownership of the abandoned mutex object.
        case WAIT_TIMEOUT: 
        case WAIT_ABANDONED: 
            break; 
    }
    ReleaseMutex(m_hErrorManagementMutex);
    return bRetVal; 
}

// Update the error message
//
VOID CScreensaver::UpdateErrorBoxText() {
    RESULTS  results;
    PROJECT* pProject;
    TCHAR    szBuffer[256];
    bool     bIsActive       = false;
    bool     bIsExecuting    = false;
    bool     bIsDownloaded   = false;
    int      iResultCount    = 0;
    int      iIndex          = 0;
    float    fProgress       = 0;


    // Load error string
    GetTextForError(m_hrError, m_szError, sizeof(m_szError) / sizeof(TCHAR));
    if (SCRAPPERR_BOINCNOGRAPHICSAPPSEXECUTING == m_hrError) {
        if (0 == rpc.get_results(results)) {
            iResultCount = results.results.size();
            for (iIndex = 0; iIndex < iResultCount; iIndex++) {
                bIsDownloaded = (RESULT_FILES_DOWNLOADED == results.results.at(iIndex)->state);
                bIsActive     = (results.results.at(iIndex)->active_task);
                bIsExecuting  = (CPU_SCHED_SCHEDULED == results.results.at(iIndex)->scheduler_state);
                if (!(bIsActive) || !(bIsDownloaded) || !(bIsExecuting)) continue;

                pProject = state.lookup_project(results.results.at(iIndex)->project_url);
                if (NULL != pProject) {
                    StringCbPrintf(szBuffer, sizeof(szBuffer) / sizeof(TCHAR),
                        _T("%s: %.2f%%\n"),
                        pProject->project_name.c_str(),
                        results.results.at(iIndex)->fraction_done * 100 
                    );

                    StringCbCat(m_szError, sizeof(m_szError) / sizeof(TCHAR), szBuffer);
                } else {
                    m_bResetCoreState = TRUE;
                }
            }
            m_szError[ sizeof(m_szError) -1 ] = '\0';
        }
    }
    BOINCTRACE(_T("CScreensaver::UpdateErrorBoxText - Updated Text '%s'\n"), m_szError);
}


// Translate an HRESULT error code into a string that can be displayed
//       to explain the error.  A class derived from CD3DScreensaver can 
//       provide its own version of this function that provides app-specific
//       error translation instead of or in addition to calling this function.
//       This function returns TRUE if a specific error was translated, or
//       FALSE if no specific translation for the HRESULT was found (though
//       it still puts a generic string into pszError).
//
BOOL CScreensaver::GetTextForError(
    HRESULT hr, TCHAR* pszError, DWORD dwNumChars
) {
    const DWORD dwErrorMap[][2] = {
    //  HRESULT, stringID
        E_FAIL, IDS_ERR_GENERIC,
        E_OUTOFMEMORY, IDS_ERR_OUTOFMEMORY,
		SCRAPPERR_BOINCNOTDETECTED, IDS_ERR_BOINCNOTDETECTED,
		SCRAPPERR_BOINCNOTDETECTEDSTARTUP, IDS_ERR_BOINCNOTDETECTEDSTARTUP,
		SCRAPPERR_BOINCSUSPENDED, IDS_ERR_BOINCSUSPENDED,
		SCRAPPERR_BOINCNOAPPSEXECUTING, IDS_ERR_BOINCNOAPPSEXECUTING,
        SCRAPPERR_BOINCNOPROJECTSDETECTED, IDS_ERR_BOINCNOAPPSEXECUTINGNOPROJECTSDETECTED,
		SCRAPPERR_BOINCNOGRAPHICSAPPSEXECUTING, IDS_ERR_BOINCNOGRAPHICSAPPSEXECUTING,
		SCRAPPERR_BOINCSCREENSAVERLOADING, IDS_ERR_BOINCSCREENSAVERLOADING,
		SCRAPPERR_NOPREVIEW, IDS_ERR_NOPREVIEW
    };
    const DWORD dwErrorMapSize = sizeof(dwErrorMap) / sizeof(DWORD[2]);

    DWORD iError;
    DWORD resid = 0;

    for(iError = 0; iError < dwErrorMapSize; iError++) {
        if (hr == (HRESULT)dwErrorMap[iError][0]) {
            resid = dwErrorMap[iError][1];
        }
    }
    if (resid == 0) {
        resid = IDS_ERR_GENERIC;
    }

    LoadString(NULL, resid, pszError, dwNumChars);

    if (resid == IDS_ERR_GENERIC) {
        return FALSE;
    } else {
        return TRUE;
    }
}



// Create the thread that is used to talk to the daemon.
//
BOOL CScreensaver::CreateDataManagementThread() {
    m_hDataManagementThread = CreateThread(
        NULL,                        // default security attributes 
        0,                           // use default stack size  
        DataManagementProcStub,      // thread function 
        NULL,                        // argument to thread function 
        0,                           // use default creation flags 
        NULL);                       // returns the thread identifier 
 
   if (m_hDataManagementThread == NULL) {
    	BOINCTRACE(_T("CScreensaver::CreateDataManagementThread: Failed to create data management thread '%d'\n"), GetLastError());
        return FALSE;
   }
   return TRUE;
}




// Terminate the thread that is used to talk to the daemon.
//
BOOL CScreensaver::DestoryDataManagementThread() {
    if (!TerminateThread(m_hDataManagementThread, 0)) {
    	BOINCTRACE(_T("CScreensaver::DestoryDataManagementThread: Failed to terminate data management thread '%d'\n"), GetLastError());
        return FALSE;
    }
    return TRUE;
}


// This function forwards to DataManagementProc, which has access to the
//       "this" pointer.
//
DWORD WINAPI CScreensaver::DataManagementProc() {
    BOOL    bErrorMode;
    HRESULT hrError;
    HWND    hwndBOINCGraphicsWindow = NULL;
    HWND    hwndForegroundWindow = NULL;
    int     iReturnValue = 0;
    time_t  tThreadCreateTime = 0;
    bool    bScreenSaverStarting = false;


    BOINCTRACE(_T("CScreensaver::DataManagementProc - Display screen saver loading message\n"));
    SetError(TRUE, SCRAPPERR_BOINCSCREENSAVERLOADING);
    tThreadCreateTime = time(0);

    while(1) {
        bScreenSaverStarting = (10 >= (time(0) - tThreadCreateTime));

        BOINCTRACE(_T("CScreensaver::DataManagementProc - Start Status = '%d', CoreNotified = '%d', ErrorMode = '%d', ErrorCode = '%x'\n"), m_iStatus, m_bCoreNotified, m_bErrorMode, m_hrError);


        // Lets try and get the current state of the CC
        if (m_bResetCoreState && m_bCoreNotified) {
            iReturnValue = rpc.get_state(state);
            if (0 == iReturnValue) {
                m_bResetCoreState = FALSE;
            }

            BOINCTRACE(_T("CScreensaver::DataManagementProc - get_state iReturnValue = '%d'\n"), iReturnValue);
        }


        iReturnValue = rpc.get_screensaver_mode(m_iStatus);
        BOINCTRACE(_T("CScreensaver::DataManagementProc - get_screensaver_mode iReturnValue = '%d'\n"), iReturnValue);
        if (0 != iReturnValue) {
            // Attempt to reinitialize the RPC client and state
            rpc.close();
            rpc.init(NULL);
            m_bResetCoreState = TRUE;

            if (!m_bBOINCConfigChecked) {
                m_bBOINCConfigChecked = TRUE;
                m_bBOINCStartupConfigured = IsConfigStartupBOINC();
            }

            if (!bScreenSaverStarting) {
		        if (m_bBOINCStartupConfigured) {
                    SetError(TRUE, SCRAPPERR_BOINCNOTDETECTED);
                } else {
                    SetError(TRUE, SCRAPPERR_BOINCNOTDETECTEDSTARTUP);
                }
            }

		    m_bCoreNotified = FALSE;
        } else {
            // Reset the error flags.
            SetError(FALSE, 0);

            if (m_bCoreNotified) {
                switch (m_iStatus) {
                    case SS_STATUS_ENABLED:
                        hwndBOINCGraphicsWindow = FindWindow(BOINC_WINDOW_CLASS_NAME, NULL);
                        if (NULL != hwndBOINCGraphicsWindow) {
                            hwndForegroundWindow = GetForegroundWindow();
                            if (hwndForegroundWindow != hwndBOINCGraphicsWindow) {
                                BOINCTRACE(_T("CScreensaver::DataManagementProc - Graphics Window Detected but NOT the foreground window, bringing window to foreground.\n"));
                                SetForegroundWindow(hwndBOINCGraphicsWindow);

                                hwndForegroundWindow = GetForegroundWindow();
                                if (hwndForegroundWindow != hwndBOINCGraphicsWindow) {
                                    BOINCTRACE(_T("CScreensaver::DataManagementProc - Graphics Window Detected but NOT the foreground window, bringing window to foreground. (Final Try)\n"));
                                    // This may be needed on Windows 2000 or better machines
                                    DWORD dwComponents = BSM_APPLICATIONS;
                                    BroadcastSystemMessage(
                                        BSF_ALLOWSFW, 
                                        &dwComponents,
                                        WM_BOINCSFW,
                                        NULL,
                                        NULL
                                   );
                                }
                            }
                        }
                        SetError(FALSE, 0);
                        break;
                    case SS_STATUS_BLANKED:
                        SetError(FALSE, 0);
                        break;
                    case SS_STATUS_BOINCSUSPENDED:
                        SetError(TRUE, SCRAPPERR_BOINCSUSPENDED);
                        break;
                    case SS_STATUS_NOAPPSEXECUTING:
                        SetError(TRUE, SCRAPPERR_BOINCNOAPPSEXECUTING);
                        break;
                    case SS_STATUS_NOPROJECTSDETECTED:
                        SetError(TRUE, SCRAPPERR_BOINCNOPROJECTSDETECTED);
                        break;
                    case SS_STATUS_NOGRAPHICSAPPSEXECUTING:
                        SetError(TRUE, SCRAPPERR_BOINCNOGRAPHICSAPPSEXECUTING);
                        break;
                }
            }
        }

        BOINCTRACE(_T("CScreensaver::DataManagementProc - Checkpoint Status = '%d', CoreNotified = '%d', ErrorMode = '%d', ErrorCode = '%x'\n"), m_iStatus, m_bCoreNotified, m_bErrorMode, m_hrError);


        GetError(bErrorMode, hrError, NULL, 0);
        if (!m_bCoreNotified && !bErrorMode) {
            BOINCTRACE(_T("CScreensaver::DataManagementProc - Startup BOINC Screensaver\n"));
            StartupBOINC();
        } else {
            if (SS_STATUS_QUIT == m_iStatus) {
                BOINCTRACE(_T("CScreensaver::DataManagementProc - Shutdown BOINC Screensaver\n"));
                ShutdownSaver();
            }
        }

        BOINCTRACE(_T("CScreensaver::SaverProc - End Status = '%d', CoreNotified = '%d', ErrorMode = '%d', ErrorCode = '%x'\n"), m_iStatus, m_bCoreNotified, m_bErrorMode, m_hrError);
        if (bScreenSaverStarting) {
            Sleep(1000);
        } else {
            Sleep(10000);
        }
    }
}


// This function forwards to DataManagementProc, which has access to the
//       "this" pointer.
//
DWORD WINAPI CScreensaver::DataManagementProcStub(LPVOID lpParam) {
    return gs_pScreensaver->DataManagementProc();
}


// Notifies BOINC that it has to start the screensaver in full screen mode.
//
VOID CScreensaver::StartupBOINC() {
	if (m_SaverMode != sm_preview) {
        if ((NULL != m_Monitors[0].hWnd) && (m_bCoreNotified == FALSE)) {
            DISPLAY_INFO di;
            BOOL         bReturnValue;
            int          iReturnValue;

            if (!m_bIs9x) {
                // Retrieve the current window station and desktop names
                bReturnValue = GetUserObjectInformation(
                    GetProcessWindowStation(), 
                    UOI_NAME, 
					di.window_station,
                    sizeof(di.window_station),
                    NULL
                );
                if (!bReturnValue) {
                    BOINCTRACE(_T("Failed to retrieve the current window station.\n"));
                }

                bReturnValue = GetUserObjectInformation(
                    GetThreadDesktop(GetCurrentThreadId()), 
                    UOI_NAME, 
					di.desktop,
					sizeof(di.desktop),
                    NULL
                );
                if (!bReturnValue) {
                    BOINCTRACE(_T("Failed to retrieve the current desktop.\n"));
                }
            }

			// Tell the boinc client to start the screen saver
			BOINCTRACE(_T("CScreensaver::StartupBOINC - Calling set_screensaver_mode - WindowStation = '%s', Desktop = '%s', BlankScreen = '%d', BlankTime = '%d'.\n"), di.window_station, di.desktop, m_dwBlankScreen, m_dwBlankTime);

            if (0 == m_dwBlankScreen) {
                iReturnValue = rpc.set_screensaver_mode(true, 0, di);
            } else {
                iReturnValue = rpc.set_screensaver_mode(true, m_dwBlankTime, di);
            }

            BOINCTRACE(_T("CScreensaver::StartupBOINC - set_screensaver_mode iReturnValue = '%d'\n"), iReturnValue);

			// We have now notified the boinc client
			if (0 == iReturnValue) {
                m_bCoreNotified = TRUE;
            } else {
       			SetError(TRUE, SCRAPPERR_BOINCNOTDETECTED);
            }
		}
	}
}



// Notifies BOINC that it has to lose the screensaver.
//
VOID CScreensaver::ShutdownBOINC() {
	if (m_bCoreNotified) {
        DISPLAY_INFO di;
		// Tell the boinc client to stop the screen saver
        rpc.set_screensaver_mode(false, 0.0, di);

        // We have now notified the boinc client
		m_bCoreNotified = FALSE;
	}
}




// Register and create the appropriate window(s)
//
HRESULT CScreensaver::CreateSaverWindow() {
    // Register an appropriate window class for the primary display
    WNDCLASS    cls;
    cls.hCursor        = LoadCursor(NULL, IDC_ARROW);
    cls.hIcon          = LoadIcon(m_hInstance, MAKEINTRESOURCE(IDI_MAIN_ICON)); 
    cls.lpszMenuName   = NULL;
    cls.lpszClassName  = _T("BOINCPrimarySaverWndClass");
    cls.hbrBackground  = (HBRUSH) GetStockObject(BLACK_BRUSH);
    cls.hInstance      = m_hInstance; 
    cls.style          = CS_VREDRAW|CS_HREDRAW;
    cls.lpfnWndProc    = SaverProcStub;
    cls.cbWndExtra     = 0; 
    cls.cbClsExtra     = 0; 
    RegisterClass(&cls);

    // Register an appropriate window class for the secondary display(s)
    WNDCLASS    cls2;
    cls2.hCursor        = LoadCursor(NULL, IDC_ARROW);
    cls2.hIcon          = LoadIcon(m_hInstance, MAKEINTRESOURCE(IDI_MAIN_ICON)); 
    cls2.lpszMenuName   = NULL;
    cls2.lpszClassName  = _T("BOINCGenericSaverWndClass");
    cls2.hbrBackground  = (HBRUSH) GetStockObject(BLACK_BRUSH);
    cls2.hInstance      = m_hInstance; 
    cls2.style          = CS_VREDRAW|CS_HREDRAW;
    cls2.lpfnWndProc    = SaverProcStub;
    cls2.cbWndExtra     = 0; 
    cls2.cbClsExtra     = 0; 
    RegisterClass(&cls2);

    // Create the window
    RECT rc;
    DWORD dwStyle;
    switch (m_SaverMode) {
        case sm_preview:
            GetClientRect(m_hWndParent, &rc);
            dwStyle = WS_VISIBLE | WS_CHILD;
            AdjustWindowRect(&rc, dwStyle, FALSE);
            m_hWnd = CreateWindow(_T(
                "BOINCPrimarySaverWndClass"), m_strWindowTitle, dwStyle, 
                rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top, 
                m_hWndParent, NULL, m_hInstance, this
            );
            m_Monitors[0].hWnd = m_hWnd;
            GetClientRect(m_hWnd, &m_rcRenderTotal);
            GetClientRect(m_hWnd, &m_rcRenderCurDevice);
            break;

        case sm_test:
            rc.left = rc.top = 50;
            rc.right = rc.left+600;
            rc.bottom = rc.top+400;
            dwStyle = WS_VISIBLE | WS_OVERLAPPED | WS_CAPTION | WS_MINIMIZEBOX | WS_SYSMENU;
            AdjustWindowRect(&rc, dwStyle, FALSE);
            m_hWnd = CreateWindow(
                 _T("BOINCPrimarySaverWndClass"), m_strWindowTitle, dwStyle, 
                rc.left, rc.top, rc.right-rc.left, rc.bottom-rc.top, 
                NULL, NULL, m_hInstance, this
            );
            m_Monitors[0].hWnd = m_hWnd;
            GetClientRect(m_hWnd, &m_rcRenderTotal);
            GetClientRect(m_hWnd, &m_rcRenderCurDevice);
			SetTimer(m_hWnd, 2, 60000, NULL);
            break;

        case sm_full:
            dwStyle = WS_VISIBLE | WS_POPUP;
            m_hWnd = NULL;
            for(DWORD iMonitor = 0; iMonitor < m_dwNumMonitors; iMonitor++) {
                INTERNALMONITORINFO* pMonitorInfo;
                pMonitorInfo = &m_Monitors[iMonitor];
				if (pMonitorInfo->hWnd == NULL) {
					if (pMonitorInfo->hMonitor == NULL)
						continue;
					rc = pMonitorInfo->rcScreen;
					if (0 == iMonitor) {
						pMonitorInfo->hWnd = CreateWindowEx(WS_EX_TOPMOST, _T("BOINCPrimarySaverWndClass"), 
							m_strWindowTitle, dwStyle, rc.left, rc.top, rc.right - rc.left, 
							rc.bottom - rc.top, NULL, NULL, m_hInstance, this);
					} else {
						pMonitorInfo->hWnd = CreateWindowEx(WS_EX_TOPMOST, _T("BOINCGenericSaverWndClass"), 
							m_strWindowTitle, dwStyle, rc.left, rc.top, rc.right - rc.left, 
							rc.bottom - rc.top, NULL, NULL, m_hInstance, this);
					}
					if (pMonitorInfo->hWnd == NULL) {
						return E_FAIL;
                    }
					
                    if (m_hWnd == NULL) {
						m_hWnd = pMonitorInfo->hWnd;
                    }

					SetTimer(pMonitorInfo->hWnd, 2, 2000, NULL);
				}
            }
    }
    if (m_hWnd == NULL) {
        return E_FAIL;
    }

    return S_OK;
}



// Run the screensaver graphics - may be preview, test or full-on mode
//
HRESULT CScreensaver::DoSaver() {
    // If we're in full on mode, and on 9x, then need to load the password DLL
    if (m_SaverMode == sm_full && m_bIs9x) {
        // Only do this if the password is set - check registry:
        HKEY hKey; 
        if (RegOpenKey(HKEY_CURRENT_USER , REGSTR_PATH_SCREENSAVE , &hKey) == ERROR_SUCCESS) { 
            DWORD dwVal;
            DWORD dwSize = sizeof(dwVal); 
 
            if ((RegQueryValueEx(
                hKey, REGSTR_VALUE_USESCRPASSWORD, NULL, NULL,
                (BYTE *)&dwVal, &dwSize) == ERROR_SUCCESS) && dwVal
            ) { 
                m_hPasswordDLL = LoadLibrary(_T("PASSWORD.CPL"));
                if (m_hPasswordDLL)
                    m_VerifySaverPassword = (VERIFYPWDPROC)GetProcAddress(m_hPasswordDLL, _T("VerifyScreenSavePwd"));
                RegCloseKey(hKey);
            }
        }
    }

    // Flag as screensaver running if in full on mode
    if (m_SaverMode == sm_full) {
        BOOL bUnused;
        SystemParametersInfo(SPI_SCREENSAVERRUNNING, TRUE, &bUnused, 0);
    }


    // Message pump
    BOOL bGotMsg;
    MSG msg;
    msg.message = WM_NULL;
    while (msg.message != WM_QUIT) {
        bGotMsg = PeekMessage(&msg, NULL, 0, 0, PM_REMOVE);
        if (bGotMsg) {
            TranslateMessage(&msg);
            DispatchMessage(&msg);
        } else {
            Sleep(10);
        }
    }

    return S_OK;
}




VOID CScreensaver::DoConfig() {
    DialogBox(NULL, MAKEINTRESOURCE(DLG_CONFIG), m_hWndParent, ConfigureDialogProcStub);
}



// Handle window messages for main screensaver windows.
//
LRESULT CScreensaver::SaverProc(
    HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
) {
    DWORD dwMonitor = 0;
#ifdef _DEBUG
    for(DWORD iIndex = 0; iIndex < m_dwNumMonitors; iIndex++) {
		if (hWnd == m_Monitors[iIndex].hWnd ) {
            dwMonitor = iIndex;
        }
    }
#endif

    switch (uMsg) {
        case WM_USER:
            // All initialization messages have gone through.  Allow
            // 500ms of idle time, then proceed with initialization.
            SetTimer(hWnd, 1, 500, NULL);
            break;

        case WM_TIMER:
			switch (wParam) { 
				case 1: 
					// Initial idle time is done, proceed with initialization.
					m_bWaitForInputIdle = FALSE;
					KillTimer(hWnd, 1);
                    break;
				case 2:
                    // Create a screen saver window on the primary display if 
                    //   the boinc client crashes
	                CreateSaverWindow();

                    // Update the position of the box every second so that it
                    //   does not end up off the visible area of the screen.
				    UpdateErrorBox();
                    break;
            }
            break;

        case WM_PAINT:
            {
                // Show error message, if there is one
                PAINTSTRUCT ps;
                BeginPaint(hWnd, &ps);

                // In preview mode, just fill 
                // the preview window with black, and the BOINC icon. 
                BOOL    bErrorMode;
                HRESULT hrError;
                GetError(bErrorMode, hrError, NULL, 0);
                if (!bErrorMode && m_SaverMode == sm_preview) {
                    RECT rc;
                    GetClientRect(hWnd,&rc);
				    FillRect(ps.hdc, &rc, (HBRUSH)GetStockObject(BLACK_BRUSH));
				    DrawIcon(ps.hdc, (rc.right / 2) - 16, (rc.bottom / 2) - 16,
					    LoadIcon(m_hInstance, MAKEINTRESOURCE(IDI_MAIN_ICON)));
                } else {
                    DoPaint(hWnd, ps.hdc);
                }

                EndPaint(hWnd, &ps);
            }

            return 0;
            break;

        case WM_MOUSEMOVE:
            if (m_SaverMode != sm_test) {
                static INT xPrev = -1;
                static INT yPrev = -1;
                INT xCur = GET_X_LPARAM(lParam);
                INT yCur = GET_Y_LPARAM(lParam);
                if (xCur != xPrev || yCur != yPrev) {
                    xPrev = xCur;
                    yPrev = yCur;
                    m_dwSaverMouseMoveCount++;
                    if (m_dwSaverMouseMoveCount > 5)
                        InterruptSaver();
                }
            }
            return 0;
            break;

        case WM_KEYDOWN:
        case WM_LBUTTONDOWN:
        case WM_RBUTTONDOWN:
        case WM_MBUTTONDOWN:
            if (m_SaverMode != sm_test) {
                InterruptSaver();
            }
            return 0;
            break;

        case WM_CLOSE:
        case WM_DESTROY:
            BOINCTRACE(_T("CScreensaver::SaverProc Received WM_CLOSE or WM_DESTROY\n"));
            if (m_SaverMode == sm_preview || m_SaverMode == sm_test) {
                ShutdownSaver();
            }
            return 0;
            break;

        case WM_SYSCOMMAND: 
            if (m_SaverMode == sm_full) {
                switch (wParam) {
                    case SC_NEXTWINDOW:
                    case SC_PREVWINDOW:
                    case SC_SCREENSAVE:
                    case SC_CLOSE:
                        return FALSE;
                }
            }
            break;

        case WM_SETCURSOR:
            if (m_SaverMode == sm_full && !m_bCheckingSaverPassword) {
                // Hide cursor
                SetCursor(NULL);
                return TRUE;
            }
            break;

        case WM_POWERBROADCAST:
            if (wParam == PBT_APMSUSPEND && m_VerifySaverPassword == NULL)
                InterruptSaver();
            break;
    }

    BOINCTRACE(_T("CScreensaver::SaverProc [%d] hWnd '%d' uMsg '%X' wParam '%d' lParam '%d'\n"), dwMonitor, hWnd, uMsg, wParam, lParam);

    return DefWindowProc(hWnd, uMsg, wParam, lParam);
}




INT_PTR CScreensaver::ConfigureDialogProc(HWND hwnd,UINT msg,WPARAM wParam,LPARAM lParam) {
	DWORD screen_blank=0, blank_time=0;
	char buf[256];
	int retval;

	switch (msg) {
		case WM_INITDIALOG:
			// make sure you check return value of registry queries
			// in case the item in question doesn't happen to exist.
			retval = UtilGetRegKey(REG_BLANK_NAME, screen_blank);
			if (retval < 0) {
                screen_blank=0;
            }
			CheckDlgButton(hwnd, IDC_BLANK, screen_blank);

			retval = UtilGetRegKey(REG_BLANK_TIME, blank_time);
			if (retval < 0) { blank_time=0; }
			_ltot(blank_time, buf, 10);
			SetDlgItemText(hwnd, IDC_BLANK_TIME, buf);

			return TRUE;
		case WM_COMMAND:
			int id=LOWORD(wParam);
			if (id==IDOK) {

				screen_blank = (IsDlgButtonChecked(hwnd, IDC_BLANK) == BST_CHECKED);
				UtilSetRegKey(REG_BLANK_NAME, screen_blank);

				GetDlgItemText(hwnd, IDC_BLANK_TIME, buf, 256);
				blank_time = atoi(buf);
				UtilSetRegKey(REG_BLANK_TIME, blank_time);

			}
			if (id == IDOK || id == IDCANCEL) {
				EndDialog(hwnd, id);
            }
			break;
	}
	return FALSE;
}




// This function forwards all window messages to SaverProc, which has
//       access to the "this" pointer.
//
LRESULT CALLBACK CScreensaver::SaverProcStub(
    HWND hWnd, UINT uMsg, WPARAM wParam, LPARAM lParam
) {
    return gs_pScreensaver->SaverProc(hWnd, uMsg, wParam, lParam);
}




INT_PTR CALLBACK CScreensaver::ConfigureDialogProcStub(
    HWND hwndDlg, UINT uMsg, WPARAM wParam, LPARAM lParam
) {
    return gs_pScreensaver->ConfigureDialogProc(hwndDlg, uMsg, wParam, lParam);
}




VOID CScreensaver::ShutdownSaver() {
    // Unflag screensaver running if in full on mode
    if (m_SaverMode == sm_full) {
        BOOL bUnused;
        SystemParametersInfo(SPI_SCREENSAVERRUNNING, FALSE, &bUnused, 0);
    }

    // Unload the password DLL (if we loaded it)
    if (m_hPasswordDLL != NULL) {
        FreeLibrary(m_hPasswordDLL);
        m_hPasswordDLL = NULL;
    }

	ShutdownBOINC();

    // Post message to drop out of message loop
    PostQuitMessage(0);
}




// A message was received (mouse move, keydown, etc.) that may mean
//       the screen saver should show the password dialog and/or shut down.
//
VOID CScreensaver::InterruptSaver() {
    BOOL bPasswordOkay = FALSE;

    if (m_SaverMode == sm_test ||
        m_SaverMode == sm_full && !m_bCheckingSaverPassword
    ) {
        if (m_bIs9x && m_SaverMode == sm_full) {
            // If no VerifyPassword function, then no password is set 
            // or we're not on 9x. 
            if (m_VerifySaverPassword != NULL) {
                m_bCheckingSaverPassword = TRUE;

                bPasswordOkay = m_VerifySaverPassword(m_hWnd);

                m_bCheckingSaverPassword = FALSE;

                if (!bPasswordOkay) {
                    // Back to screen saving...
                    SetCursor(NULL);
                    m_dwSaverMouseMoveCount = 0;

                    return;
                }
            }
        }
        ShutdownSaver();
    }
}



// Update the box that shows the error message
//
VOID CScreensaver::UpdateErrorBox() {
    INTERNALMONITORINFO* pMonitorInfo;
    HWND hwnd;
    RECT rcBounds;
    static DWORD dwTimeLast = 0;
    DWORD dwTimeNow;
    FLOAT fTimeDelta;


    // Update timing to determine how much to move error box
    if (dwTimeLast == 0) {
        dwTimeLast = timeGetTime();
    }
    dwTimeNow = timeGetTime();
    fTimeDelta = (FLOAT)(dwTimeNow - dwTimeLast) / 1000.0f;
    dwTimeLast = dwTimeNow;

    for(DWORD iMonitor = 0; iMonitor < m_dwNumMonitors; iMonitor++) {
        pMonitorInfo = &m_Monitors[iMonitor];
        hwnd = pMonitorInfo->hWnd;
        if (hwnd == NULL)
            continue;
        if (m_SaverMode == sm_full) {
            rcBounds = pMonitorInfo->rcScreen;
            ScreenToClient(hwnd, (POINT*)&rcBounds.left);
            ScreenToClient(hwnd, (POINT*)&rcBounds.right);
        } else {
            rcBounds = m_rcRenderTotal;
        }

        if (pMonitorInfo->widthError == 0) {
            if (m_SaverMode == sm_preview)                {
                pMonitorInfo->widthError = (float) (rcBounds.right - rcBounds.left);
                pMonitorInfo->heightError = (float) (rcBounds.bottom - rcBounds.top);
                pMonitorInfo->xError = 0.0f;
                pMonitorInfo->yError = 0.0f;
                pMonitorInfo->xVelError = 0.0f;
                pMonitorInfo->yVelError = 0.0f;
                InvalidateRect(hwnd, NULL, FALSE);    // Invalidate the hwnd so it gets drawn
                UpdateWindow(hwnd);
            } else {
                pMonitorInfo->widthError = 500;
                pMonitorInfo->heightError = 154;
                pMonitorInfo->xError = (rcBounds.right + rcBounds.left - pMonitorInfo->widthError) / 2.0f;
                pMonitorInfo->yError = (rcBounds.bottom + rcBounds.top - pMonitorInfo->heightError) / 2.0f;
                pMonitorInfo->xVelError = (rcBounds.right - rcBounds.left) / 10.0f;
                pMonitorInfo->yVelError = (rcBounds.bottom - rcBounds.top) / 20.0f;
            }
        } else {
            if (m_SaverMode != sm_preview) {
                RECT rcOld;
                RECT rcNew;

                SetRect(&rcOld, (INT)pMonitorInfo->xError, (INT)pMonitorInfo->yError,
                    (INT)(pMonitorInfo->xError + pMonitorInfo->widthError),
                    (INT)(pMonitorInfo->yError + pMonitorInfo->heightError));

                // Update rect velocity
                if ((pMonitorInfo->xError + pMonitorInfo->xVelError * fTimeDelta + 
                    pMonitorInfo->widthError > rcBounds.right && pMonitorInfo->xVelError > 0.0f) ||
                    (pMonitorInfo->xError + pMonitorInfo->xVelError * fTimeDelta < 
                    rcBounds.left && pMonitorInfo->xVelError < 0.0f)
                ) {
                    pMonitorInfo->xVelError = -pMonitorInfo->xVelError;
                }
                if ((pMonitorInfo->yError + pMonitorInfo->yVelError * fTimeDelta + 
                    pMonitorInfo->heightError > rcBounds.bottom && pMonitorInfo->yVelError > 0.0f) ||
                    (pMonitorInfo->yError + pMonitorInfo->yVelError * fTimeDelta < 
                    rcBounds.top && pMonitorInfo->yVelError < 0.0f)
                ) {
                    pMonitorInfo->yVelError = -pMonitorInfo->yVelError;
                }
                // Update rect position
                pMonitorInfo->xError += pMonitorInfo->xVelError * fTimeDelta;
                pMonitorInfo->yError += pMonitorInfo->yVelError * fTimeDelta;
            
                SetRect(&rcNew, (INT)pMonitorInfo->xError, (INT)pMonitorInfo->yError,
                    (INT)(pMonitorInfo->xError + pMonitorInfo->widthError),
                    (INT)(pMonitorInfo->yError + pMonitorInfo->heightError));

                if (rcOld.left != rcNew.left || rcOld.top != rcNew.top)
                {
                    InvalidateRect(hwnd, &rcOld, TRUE);
                    InvalidateRect(hwnd, &rcNew, TRUE);
                    UpdateWindow(hwnd);
                }
            }
        }
    }
}




VOID CScreensaver::DoPaint(HWND hwnd, HDC hdc) {
    HMONITOR hMonitor = MonitorFromWindow(hwnd, MONITOR_DEFAULTTONEAREST);
    INTERNALMONITORINFO* pMonitorInfo;
    for(DWORD iMonitor = 0; iMonitor < m_dwNumMonitors; iMonitor++) {
        pMonitorInfo = &m_Monitors[iMonitor];
        if (pMonitorInfo->hMonitor == hMonitor)
            break;
    }

    if (iMonitor == m_dwNumMonitors) {
        return;
    }

    // Draw the error message box
    BOOL    bErrorMode;
    HRESULT hrError;
    TCHAR	szError[400];
    RECT    rc;
    RECT    rc2;
    RECT    rcOrginal;
	int		iTextHeight;

	static HBRUSH	hbrushBlack = (HBRUSH)GetStockObject(BLACK_BRUSH);
	static HBRUSH	hbrushRed = (HBRUSH)CreateSolidBrush(RGB(255,0,0));
	static HBITMAP  hbmp = LoadBitmap(m_hInstance, MAKEINTRESOURCE(IDB_BOINCSPLAT));


    // Retrieve the latest piece of error information 
    GetError(bErrorMode, hrError, szError, sizeof(szError)/sizeof(TCHAR));


    // If the screensaver has switched to a blanked state or not in an error mode,
    // we should exit here so the screen has been erased to black.
    if ((SS_STATUS_BLANKED == m_iStatus) || !bErrorMode) {
        BOINCTRACE(_T("CScreensaver::DoPaint - Blank Screen Detected\n"));
        rc = pMonitorInfo->rcScreen;
        ScreenToClient(hwnd, (POINT*)&rc.left);
        ScreenToClient(hwnd, (POINT*)&rc.right);
        FillRect(hdc, &rc, hbrushBlack);
        return;
    }

    
    SetRect(&rc, (INT)pMonitorInfo->xError, (INT)pMonitorInfo->yError,
        (INT)(pMonitorInfo->xError + pMonitorInfo->widthError),
        (INT)(pMonitorInfo->yError + pMonitorInfo->heightError)
    );


	SetRect(&rcOrginal, (INT)pMonitorInfo->xError, (INT)pMonitorInfo->yError,
        (INT)(pMonitorInfo->xError + pMonitorInfo->widthError),
        (INT)(pMonitorInfo->yError + pMonitorInfo->heightError)
    );


	// Draw the background as black.
	FillRect(hdc, &rc, hbrushBlack);

    // Draw a frame in red.
	//FrameRect(hdc, &rc, hbrushRed);

    // Draw the bitmap rectangle and copy the bitmap into 
    // it. the bitmap is centered in the rectangle by adding 2
	// to the left and top coordinates of the bitmap rectangle,
	// and subtracting 4 from the right and bottom coordinates.
	DrawTransparentBitmap(hdc, hbmp, (rc.left + 2), (rc.top + 2), RGB(129, 129, 129));
	rc.left += 166;

	// Draw text in the center of the frame
	SetBkColor(hdc, RGB(0,0,0));           // Black
	SetTextColor(hdc, RGB(255,255,255));   // Red

	rc2 = rc;
    iTextHeight = DrawText(hdc, szError, -1, &rc, DT_CENTER | DT_CALCRECT);
	rc = rc2;
    rc2.top = (rc.bottom + rc.top - iTextHeight) / 2;
    DrawText(hdc, szError, -1, &rc2, DT_CENTER);


    // Erase everywhere except the error message box
    ExcludeClipRect(hdc, rcOrginal.left, rcOrginal.top, rcOrginal.right, rcOrginal.bottom);
    rc = pMonitorInfo->rcScreen;
    ScreenToClient(hwnd, (POINT*)&rc.left);
    ScreenToClient(hwnd, (POINT*)&rc.right);
    FillRect(hdc, &rc, hbrushBlack);

}




VOID CScreensaver::ChangePassword() {
    // Load the password change DLL
    HINSTANCE mpr = LoadLibrary(_T("MPR.DLL"));

    if (mpr != NULL) {
        // Grab the password change function from it
        typedef DWORD (PASCAL *PWCHGPROC)(LPCSTR, HWND, DWORD, LPVOID);
        PWCHGPROC pwd = (PWCHGPROC)GetProcAddress(mpr, "PwdChangePasswordA");

        // Do the password change
        if (pwd != NULL) {
            pwd("SCRSAVE", m_hWndParent, 0, NULL);
        }

        // Free the library
        FreeLibrary(mpr);
    }
}




// Draws a bitmap on the screen with a transparent background.
//         Code orginally from Microsoft Knowledge Base Article - 79212
//
void CScreensaver::DrawTransparentBitmap(
    HDC hdc, HBITMAP hBitmap, LONG xStart, LONG yStart,
    COLORREF cTransparentColor
){
    BITMAP     bm;
    COLORREF   cColor;
    HBITMAP    bmAndBack, bmAndObject, bmAndMem, bmSave;
    HBITMAP    bmBackOld, bmObjectOld, bmMemOld, bmSaveOld;
    HDC        hdcMem, hdcBack, hdcObject, hdcTemp, hdcSave;
    POINT      ptSize;

    hdcTemp = CreateCompatibleDC(hdc);
    SelectObject(hdcTemp, hBitmap);   // Select the bitmap

    GetObject(hBitmap, sizeof(BITMAP), (LPSTR)&bm);
    ptSize.x = bm.bmWidth;            // Get width of bitmap
    ptSize.y = bm.bmHeight;           // Get height of bitmap
    DPtoLP(hdcTemp, &ptSize, 1);      // Convert from device

                                     // to logical points

    // Create some DCs to hold temporary data.
    hdcBack   = CreateCompatibleDC(hdc);
    hdcObject = CreateCompatibleDC(hdc);
    hdcMem    = CreateCompatibleDC(hdc);
    hdcSave   = CreateCompatibleDC(hdc);

    // Create a bitmap for each DC. DCs are required for a number of
    // GDI functions.

    // Monochrome DC
    bmAndBack   = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL);

    // Monochrome DC
    bmAndObject = CreateBitmap(ptSize.x, ptSize.y, 1, 1, NULL);

    bmAndMem    = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y);
    bmSave      = CreateCompatibleBitmap(hdc, ptSize.x, ptSize.y);

    // Each DC must select a bitmap object to store pixel data.
    bmBackOld   = (HBITMAP)SelectObject(hdcBack, bmAndBack);
    bmObjectOld = (HBITMAP)SelectObject(hdcObject, bmAndObject);
    bmMemOld    = (HBITMAP)SelectObject(hdcMem, bmAndMem);
    bmSaveOld   = (HBITMAP)SelectObject(hdcSave, bmSave);

    // Set proper mapping mode.
    SetMapMode(hdcTemp, GetMapMode(hdc));

    // Save the bitmap sent here, because it will be overwritten.
    BitBlt(hdcSave, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCCOPY);

    // Set the background color of the source DC to the color.
    // contained in the parts of the bitmap that should be transparent
    cColor = SetBkColor(hdcTemp, cTransparentColor);

    // Create the object mask for the bitmap by performing a BitBlt
    // from the source bitmap to a monochrome bitmap.
    BitBlt(hdcObject, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCCOPY);

    // Set the background color of the source DC back to the original
    // color.
    SetBkColor(hdcTemp, cColor);

    // Create the inverse of the object mask.
    BitBlt(hdcBack, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, NOTSRCCOPY);

    // Copy the background of the main DC to the destination.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdc, xStart, yStart, SRCCOPY);

    // Mask out the places where the bitmap will be placed.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcObject, 0, 0, SRCAND);

    // Mask out the transparent colored pixels on the bitmap.
    BitBlt(hdcTemp, 0, 0, ptSize.x, ptSize.y, hdcBack, 0, 0, SRCAND);

    // XOR the bitmap with the background on the destination DC.
    BitBlt(hdcMem, 0, 0, ptSize.x, ptSize.y, hdcTemp, 0, 0, SRCPAINT);

    // Copy the destination to the screen.
    BitBlt(hdc, xStart, yStart, ptSize.x, ptSize.y, hdcMem, 0, 0, SRCCOPY);

    // Place the original bitmap back into the bitmap sent here.
    BitBlt(hdcTemp, 0, 0, ptSize.x, ptSize.y, hdcSave, 0, 0, SRCCOPY);

    // Delete the memory bitmaps.
    DeleteObject(SelectObject(hdcBack, bmBackOld));
    DeleteObject(SelectObject(hdcObject, bmObjectOld));
    DeleteObject(SelectObject(hdcMem, bmMemOld));
    DeleteObject(SelectObject(hdcSave, bmSaveOld));

    // Delete the memory DCs.
    DeleteDC(hdcMem);
    DeleteDC(hdcBack);
    DeleteDC(hdcObject);
    DeleteDC(hdcSave);
    DeleteDC(hdcTemp);
}


const char *BOINC_RCSID_116268c72f = "$Id$";