//=============================================================================
 
//
 
// multimon.h -- Stub module that fakes multiple monitor apis on Win32 OSes
 
//               without them.
 
//
 
// By using this header your code will get back default values from
 
// GetSystemMetrics() for new metrics, and the new multimonitor APIs
 
// will act like only one display is present on a Win32 OS without
 
// multimonitor APIs.
 
//
 
// Exactly one source must include this with COMPILE_MULTIMON_STUBS defined.
 
//
 
// Copyright (c) Microsoft Corporation. All rights reserved. 
 
//
 
//=============================================================================
 
 
 
#ifdef __cplusplus
 
extern "C" {            // Assume C declarations for C++
 
#endif // __cplusplus
 
 
 
//
 
// If we are building with Win95/NT4 headers, we need to declare
 
// the multimonitor-related metrics and APIs ourselves.
 
//
 
#ifndef SM_CMONITORS
 
 
 
#define SM_XVIRTUALSCREEN       76
 
#define SM_YVIRTUALSCREEN       77
 
#define SM_CXVIRTUALSCREEN      78
 
#define SM_CYVIRTUALSCREEN      79
 
#define SM_CMONITORS            80
 
#define SM_SAMEDISPLAYFORMAT    81
 
 
 
// HMONITOR is already declared if WINVER >= 0x0500 in windef.h
 
// This is for components built with an older version number.
 
//
 
#if !defined(HMONITOR_DECLARED) && (WINVER < 0x0500)
 
DECLARE_HANDLE(HMONITOR);
 
#define HMONITOR_DECLARED
 
#endif
 
 
 
#define MONITOR_DEFAULTTONULL       0x00000000
 
#define MONITOR_DEFAULTTOPRIMARY    0x00000001
 
#define MONITOR_DEFAULTTONEAREST    0x00000002
 
 
 
#define MONITORINFOF_PRIMARY        0x00000001
 
 
 
typedef struct tagMONITORINFO
 
{
 
    DWORD   cbSize;
 
    RECT    rcMonitor;
 
    RECT    rcWork;
 
    DWORD   dwFlags;
 
} MONITORINFO, *LPMONITORINFO;
 
 
 
#ifndef CCHDEVICENAME
 
#define CCHDEVICENAME 32
 
#endif
 
 
 
#ifdef __cplusplus
 
typedef struct tagMONITORINFOEXA : public tagMONITORINFO
 
{
 
    CHAR        szDevice[CCHDEVICENAME];
 
} MONITORINFOEXA, *LPMONITORINFOEXA;
 
typedef struct tagMONITORINFOEXW : public tagMONITORINFO
 
{
 
    WCHAR       szDevice[CCHDEVICENAME];
 
} MONITORINFOEXW, *LPMONITORINFOEXW;
 
#ifdef UNICODE
 
typedef MONITORINFOEXW MONITORINFOEX;
 
typedef LPMONITORINFOEXW LPMONITORINFOEX;
 
#else
 
typedef MONITORINFOEXA MONITORINFOEX;
 
typedef LPMONITORINFOEXA LPMONITORINFOEX;
 
#endif // UNICODE
 
#else // ndef __cplusplus
 
typedef struct tagMONITORINFOEXA
 
{
 
    MONITORINFO;
 
    CHAR        szDevice[CCHDEVICENAME];
 
} MONITORINFOEXA, *LPMONITORINFOEXA;
 
typedef struct tagMONITORINFOEXW
 
{
 
    MONITORINFO;
 
    WCHAR       szDevice[CCHDEVICENAME];
 
} MONITORINFOEXW, *LPMONITORINFOEXW;
 
#ifdef UNICODE
 
typedef MONITORINFOEXW MONITORINFOEX;
 
typedef LPMONITORINFOEXW LPMONITORINFOEX;
 
#else
 
typedef MONITORINFOEXA MONITORINFOEX;
 
typedef LPMONITORINFOEXA LPMONITORINFOEX;
 
#endif // UNICODE
 
#endif
 
 
 
typedef BOOL (CALLBACK* MONITORENUMPROC)(HMONITOR, HDC, LPRECT, LPARAM);
 
 
 
#ifndef DISPLAY_DEVICE_ATTACHED_TO_DESKTOP
 
typedef struct _DISPLAY_DEVICEA {
 
    DWORD  cb;
 
    CHAR   DeviceName[32];
 
    CHAR   DeviceString[128];
 
    DWORD  StateFlags;
 
    CHAR   DeviceID[128];
 
    CHAR   DeviceKey[128];
 
} DISPLAY_DEVICEA, *PDISPLAY_DEVICEA, *LPDISPLAY_DEVICEA;
 
typedef struct _DISPLAY_DEVICEW {
 
    DWORD  cb;
 
    WCHAR  DeviceName[32];
 
    WCHAR  DeviceString[128];
 
    DWORD  StateFlags;
 
    WCHAR  DeviceID[128];
 
    WCHAR  DeviceKey[128];
 
} DISPLAY_DEVICEW, *PDISPLAY_DEVICEW, *LPDISPLAY_DEVICEW;
 
#ifdef UNICODE
 
typedef DISPLAY_DEVICEW DISPLAY_DEVICE;
 
typedef PDISPLAY_DEVICEW PDISPLAY_DEVICE;
 
typedef LPDISPLAY_DEVICEW LPDISPLAY_DEVICE;
 
#else
 
typedef DISPLAY_DEVICEA DISPLAY_DEVICE;
 
typedef PDISPLAY_DEVICEA PDISPLAY_DEVICE;
 
typedef LPDISPLAY_DEVICEA LPDISPLAY_DEVICE;
 
#endif // UNICODE
 
 
 
#define DISPLAY_DEVICE_ATTACHED_TO_DESKTOP 0x00000001
 
#define DISPLAY_DEVICE_MULTI_DRIVER        0x00000002
 
#define DISPLAY_DEVICE_PRIMARY_DEVICE      0x00000004
 
#define DISPLAY_DEVICE_MIRRORING_DRIVER    0x00000008
 
#define DISPLAY_DEVICE_VGA_COMPATIBLE      0x00000010
 
#endif
 
 
 
#endif  // SM_CMONITORS
 
 
 
#undef GetMonitorInfo
 
#undef GetSystemMetrics
 
#undef MonitorFromWindow
 
#undef MonitorFromRect
 
#undef MonitorFromPoint
 
#undef EnumDisplayMonitors
 
#undef EnumDisplayDevices
 
 
 
//
 
// Define COMPILE_MULTIMON_STUBS to compile the stubs;
 
// otherwise, you get the declarations.
 
//
 
#ifdef COMPILE_MULTIMON_STUBS
 
 
 
//-----------------------------------------------------------------------------
 
//
 
// Implement the API stubs.
 
//
 
//-----------------------------------------------------------------------------
 
 
 
#ifndef _MULTIMON_USE_SECURE_CRT
 
#if defined(__GOT_SECURE_LIB__) && __GOT_SECURE_LIB__ >= 200402L
 
#define _MULTIMON_USE_SECURE_CRT 1
 
#else
 
#define _MULTIMON_USE_SECURE_CRT 0
 
#endif
 
#endif
 
 
 
#ifndef MULTIMON_FNS_DEFINED
 
 
 
int      (WINAPI* g_pfnGetSystemMetrics)(int) = NULL;
 
HMONITOR (WINAPI* g_pfnMonitorFromWindow)(HWND, DWORD) = NULL;
 
HMONITOR (WINAPI* g_pfnMonitorFromRect)(LPCRECT, DWORD) = NULL;
 
HMONITOR (WINAPI* g_pfnMonitorFromPoint)(POINT, DWORD) = NULL;
 
BOOL     (WINAPI* g_pfnGetMonitorInfo)(HMONITOR, LPMONITORINFO) = NULL;
 
BOOL     (WINAPI* g_pfnEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM) = NULL;
 
BOOL     (WINAPI* g_pfnEnumDisplayDevices)(PVOID, DWORD, PDISPLAY_DEVICE,DWORD) = NULL;
 
BOOL     g_fMultiMonInitDone = FALSE;
 
BOOL     g_fMultimonPlatformNT = FALSE;
 
 
 
#endif
 
 
 
BOOL IsPlatformNT()
 
{ 
 
    OSVERSIONINFOA osvi = {0};
 
    osvi.dwOSVersionInfoSize = sizeof(osvi);
 
    GetVersionExA((OSVERSIONINFOA*)&osvi);
 
    return (VER_PLATFORM_WIN32_NT == osvi.dwPlatformId);    
 
}
 
 
 
BOOL InitMultipleMonitorStubs(void)
 
{
 
    HMODULE hUser32;
 
    if (g_fMultiMonInitDone)
 
    {
 
        return g_pfnGetMonitorInfo != NULL;
 
    }
 
 
 
    g_fMultimonPlatformNT = IsPlatformNT();
 
    hUser32 = GetModuleHandle(TEXT("USER32"));
 
    if (hUser32 &&
 
        (*(FARPROC*)&g_pfnGetSystemMetrics    = GetProcAddress(hUser32,"GetSystemMetrics")) != NULL &&
 
        (*(FARPROC*)&g_pfnMonitorFromWindow   = GetProcAddress(hUser32,"MonitorFromWindow")) != NULL &&
 
        (*(FARPROC*)&g_pfnMonitorFromRect     = GetProcAddress(hUser32,"MonitorFromRect")) != NULL &&
 
        (*(FARPROC*)&g_pfnMonitorFromPoint    = GetProcAddress(hUser32,"MonitorFromPoint")) != NULL &&
 
        (*(FARPROC*)&g_pfnEnumDisplayMonitors = GetProcAddress(hUser32,"EnumDisplayMonitors")) != NULL &&
 
#ifdef UNICODE
 
        (*(FARPROC*)&g_pfnEnumDisplayDevices  = GetProcAddress(hUser32,"EnumDisplayDevicesW")) != NULL &&
 
        (*(FARPROC*)&g_pfnGetMonitorInfo      = g_fMultimonPlatformNT ? GetProcAddress(hUser32,"GetMonitorInfoW") : 
 
                                                GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL
 
#else
 
        (*(FARPROC*)&g_pfnGetMonitorInfo      = GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL &&
 
        (*(FARPROC*)&g_pfnEnumDisplayDevices  = GetProcAddress(hUser32,"EnumDisplayDevicesA")) != NULL
 
#endif
 
    ) {
 
        g_fMultiMonInitDone = TRUE;
 
        return TRUE;
 
    }
 
    else
 
    {
 
        g_pfnGetSystemMetrics    = NULL;
 
        g_pfnMonitorFromWindow   = NULL;
 
        g_pfnMonitorFromRect     = NULL;
 
        g_pfnMonitorFromPoint    = NULL;
 
        g_pfnGetMonitorInfo      = NULL;
 
        g_pfnEnumDisplayMonitors = NULL;
 
        g_pfnEnumDisplayDevices  = NULL;
 
 
 
        g_fMultiMonInitDone = TRUE;
 
        return FALSE;
 
    }
 
}
 
 
 
//-----------------------------------------------------------------------------
 
//
 
// fake implementations of Monitor APIs that work with the primary display
 
// no special parameter validation is made since these run in client code
 
//
 
//-----------------------------------------------------------------------------
 
 
 
int WINAPI
 
xGetSystemMetrics(int nIndex)
 
{
 
    if (InitMultipleMonitorStubs())
 
        return g_pfnGetSystemMetrics(nIndex);
 
 
 
    switch (nIndex)
 
    {
 
    case SM_CMONITORS:
 
    case SM_SAMEDISPLAYFORMAT:
 
        return 1;
 
 
 
    case SM_XVIRTUALSCREEN:
 
    case SM_YVIRTUALSCREEN:
 
        return 0;
 
 
 
    case SM_CXVIRTUALSCREEN:
 
        nIndex = SM_CXSCREEN;
 
        break;
 
 
 
    case SM_CYVIRTUALSCREEN:
 
        nIndex = SM_CYSCREEN;
 
        break;
 
    }
 
 
 
    return GetSystemMetrics(nIndex);
 
}
 
 
 
#define xPRIMARY_MONITOR ((HMONITOR)0x12340042)
 
 
 
HMONITOR WINAPI
 
xMonitorFromPoint(POINT ptScreenCoords, DWORD dwFlags)
 
{
 
    if (InitMultipleMonitorStubs())
 
        return g_pfnMonitorFromPoint(ptScreenCoords, dwFlags);
 
 
 
    if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
 
        ((ptScreenCoords.x >= 0) &&
 
        (ptScreenCoords.x < GetSystemMetrics(SM_CXSCREEN)) &&
 
        (ptScreenCoords.y >= 0) &&
 
        (ptScreenCoords.y < GetSystemMetrics(SM_CYSCREEN))))
 
    {
 
        return xPRIMARY_MONITOR;
 
    }
 
 
 
    return NULL;
 
}
 
 
 
HMONITOR WINAPI
 
xMonitorFromRect(LPCRECT lprcScreenCoords, DWORD dwFlags)
 
{
 
    if (InitMultipleMonitorStubs())
 
        return g_pfnMonitorFromRect(lprcScreenCoords, dwFlags);
 
 
 
    if ((dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
 
        ((lprcScreenCoords->right > 0) &&
 
        (lprcScreenCoords->bottom > 0) &&
 
        (lprcScreenCoords->left < GetSystemMetrics(SM_CXSCREEN)) &&
 
        (lprcScreenCoords->top < GetSystemMetrics(SM_CYSCREEN))))
 
    {
 
        return xPRIMARY_MONITOR;
 
    }
 
 
 
    return NULL;
 
}
 
 
 
HMONITOR WINAPI
 
xMonitorFromWindow(HWND hWnd, DWORD dwFlags)
 
{
 
    WINDOWPLACEMENT wp;
 
 
 
    if (InitMultipleMonitorStubs())
 
        return g_pfnMonitorFromWindow(hWnd, dwFlags);
 
 
 
    if (dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST))
 
        return xPRIMARY_MONITOR;
 
 
 
    if (IsIconic(hWnd) ?
 
            GetWindowPlacement(hWnd, &wp) :
 
            GetWindowRect(hWnd, &wp.rcNormalPosition)) {
 
 
 
        return xMonitorFromRect(&wp.rcNormalPosition, dwFlags);
 
    }
 
 
 
    return NULL;
 
}
 
 
 
BOOL WINAPI
 
xGetMonitorInfo(HMONITOR hMonitor, __inout LPMONITORINFO lpMonitorInfo)
 
{
 
    RECT rcWork;
 
 
 
    if (InitMultipleMonitorStubs())
 
    {
 
        BOOL f = g_pfnGetMonitorInfo(hMonitor, lpMonitorInfo);
 
#ifdef UNICODE
 
        if (f && !g_fMultimonPlatformNT && (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX)))
 
        { 
 
            MultiByteToWideChar(CP_ACP, 0,
 
                (LPSTR)((MONITORINFOEX*)lpMonitorInfo)->szDevice, -1,
 
                ((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)));
 
        }
 
#endif
 
        return f;
 
    }
 
 
 
    if ((hMonitor == xPRIMARY_MONITOR) &&
 
        lpMonitorInfo &&
 
        (lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
 
        SystemParametersInfoA(SPI_GETWORKAREA, 0, &rcWork, 0))
 
    {
 
        lpMonitorInfo->rcMonitor.left = 0;
 
        lpMonitorInfo->rcMonitor.top  = 0;
 
        lpMonitorInfo->rcMonitor.right  = GetSystemMetrics(SM_CXSCREEN);
 
        lpMonitorInfo->rcMonitor.bottom = GetSystemMetrics(SM_CYSCREEN);
 
        lpMonitorInfo->rcWork = rcWork;
 
        lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
 
 
 
        if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX))
 
        {
 
#ifdef UNICODE
 
            MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, ((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)));
 
#else // UNICODE
 
#if _MULTIMON_USE_SECURE_CRT
 
            strncpy_s(((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)), TEXT("DISPLAY"), (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)) - 1);
 
#else
 
            lstrcpyn(((MONITORINFOEX*)lpMonitorInfo)->szDevice, TEXT("DISPLAY"), (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR)));
 
#endif // _MULTIMON_USE_SECURE_CRT
 
#endif // UNICODE
 
        }
 
 
 
        return TRUE;
 
    }
 
 
 
    return FALSE;
 
}
 
 
 
BOOL WINAPI
 
xEnumDisplayMonitors(
 
        HDC             hdcOptionalForPainting,
 
        LPCRECT         lprcEnumMonitorsThatIntersect,
 
        MONITORENUMPROC lpfnEnumProc,
 
        LPARAM          dwData)
 
{
 
    RECT rcLimit;
 
 
 
    if (InitMultipleMonitorStubs()) {
 
        return g_pfnEnumDisplayMonitors(
 
                hdcOptionalForPainting,
 
                lprcEnumMonitorsThatIntersect,
 
                lpfnEnumProc,
 
                dwData);
 
    }
 
 
 
    if (!lpfnEnumProc)
 
        return FALSE;
 
 
 
    rcLimit.left   = 0;
 
    rcLimit.top    = 0;
 
    rcLimit.right  = GetSystemMetrics(SM_CXSCREEN);
 
    rcLimit.bottom = GetSystemMetrics(SM_CYSCREEN);
 
 
 
    if (hdcOptionalForPainting)
 
    {
 
        RECT    rcClip;
 
        POINT   ptOrg;
 
 
 
        switch (GetClipBox(hdcOptionalForPainting, &rcClip))
 
        {
 
        default:
 
            if (!GetDCOrgEx(hdcOptionalForPainting, &ptOrg))
 
                return FALSE;
 
 
 
            OffsetRect(&rcLimit, -ptOrg.x, -ptOrg.y);
 
            if (IntersectRect(&rcLimit, &rcLimit, &rcClip) &&
 
                (!lprcEnumMonitorsThatIntersect ||
 
                     IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect))) {
 
 
 
                break;
 
            }
 
            //fall thru
 
        case NULLREGION:
 
             return TRUE;
 
        case ERROR:
 
             return FALSE;
 
        }
 
    } else {
 
        if (    lprcEnumMonitorsThatIntersect &&
 
                !IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect)) {
 
 
 
            return TRUE;
 
        }
 
    }
 
 
 
    return lpfnEnumProc(
 
            xPRIMARY_MONITOR,
 
            hdcOptionalForPainting,
 
            &rcLimit,
 
            dwData);
 
}
 
 
 
BOOL WINAPI
 
xEnumDisplayDevices(
 
    PVOID Unused,
 
    DWORD iDevNum,
 
    __inout PDISPLAY_DEVICE lpDisplayDevice,
 
    DWORD dwFlags)
 
{
 
    if (InitMultipleMonitorStubs())
 
        return g_pfnEnumDisplayDevices(Unused, iDevNum, lpDisplayDevice, dwFlags);
 
 
 
    if (Unused != NULL)
 
        return FALSE;
 
 
 
    if (iDevNum != 0)
 
        return FALSE;
 
 
 
    if (lpDisplayDevice == NULL || lpDisplayDevice->cb < sizeof(DISPLAY_DEVICE))
 
        return FALSE;
 
 
 
#ifdef UNICODE
 
    MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceName, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)));
 
    MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceString, (sizeof(lpDisplayDevice->DeviceString)/sizeof(TCHAR)));
 
#else // UNICODE
 
#if _MULTIMON_USE_SECURE_CRT
 
    strncpy_s((LPTSTR)lpDisplayDevice->DeviceName, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)), TEXT("DISPLAY"), (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)) - 1);
 
    strncpy_s((LPTSTR)lpDisplayDevice->DeviceString, (sizeof(lpDisplayDevice->DeviceString)/sizeof(TCHAR)), TEXT("DISPLAY"), (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)) - 1);
 
#else
 
    lstrcpyn((LPTSTR)lpDisplayDevice->DeviceName,   TEXT("DISPLAY"), (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR)));
 
    lstrcpyn((LPTSTR)lpDisplayDevice->DeviceString, TEXT("DISPLAY"), (sizeof(lpDisplayDevice->DeviceString)/sizeof(TCHAR)));
 
#endif // _MULTIMON_USE_SECURE_CRT
 
#endif // UNICODE
 
 
 
    lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ATTACHED_TO_DESKTOP | DISPLAY_DEVICE_PRIMARY_DEVICE;
 
 
 
    return TRUE;
 
}
 
 
 
#undef xPRIMARY_MONITOR
 
#undef COMPILE_MULTIMON_STUBS
 
 
 
#else   // COMPILE_MULTIMON_STUBS
 
 
 
extern int  WINAPI xGetSystemMetrics(int);
 
extern HMONITOR WINAPI xMonitorFromWindow(HWND, DWORD);
 
extern HMONITOR WINAPI xMonitorFromRect(LPCRECT, DWORD);
 
extern HMONITOR WINAPI xMonitorFromPoint(POINT, DWORD);
 
extern BOOL WINAPI xGetMonitorInfo(HMONITOR, LPMONITORINFO);
 
extern BOOL WINAPI xEnumDisplayMonitors(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
 
extern BOOL WINAPI xEnumDisplayDevices(PVOID, DWORD, PDISPLAY_DEVICE, DWORD);
 
 
 
#endif  // COMPILE_MULTIMON_STUBS
 
 
 
//
 
// build defines that replace the regular APIs with our versions
 
//
 
#define GetSystemMetrics    xGetSystemMetrics
 
#define MonitorFromWindow   xMonitorFromWindow
 
#define MonitorFromRect     xMonitorFromRect
 
#define MonitorFromPoint    xMonitorFromPoint
 
#define GetMonitorInfo      xGetMonitorInfo
 
#define EnumDisplayMonitors xEnumDisplayMonitors
 
#define EnumDisplayDevices  xEnumDisplayDevices
 
 
 
#ifdef __cplusplus
 
}
 
#endif  // __cplusplus