335 lines
9.3 KiB
C
335 lines
9.3 KiB
C
#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500)
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//=============================================================================
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//
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// MULTIMON
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// stub module that fakes multiple monitor apis on pre Memphis Win32 OSes
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//
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// By using this header your code will work unchanged on Win95,
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// you will get back default values from GetSystemMetrics() for new metrics
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// and the new APIs will act like only one display is present.
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//
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// exactly one source must include this with COMPILE_MULTIMON_STUBS defined
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//
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//=============================================================================
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#ifdef __cplusplus
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extern "C" { /* Assume C declarations for C++ */
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#endif /* __cplusplus */
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//
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// if we are building on Win95/NT4 headers we need to declare this stuff ourselves
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//
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#ifndef SM_CMONITORS
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#define SM_XVIRTUALSCREEN 76
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#define SM_YVIRTUALSCREEN 77
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#define SM_CXVIRTUALSCREEN 78
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#define SM_CYVIRTUALSCREEN 79
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#define SM_CMONITORS 80
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#define SM_SAMEDISPLAYFORMAT 81
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DECLARE_HANDLE(HMONITOR);
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#define MONITOR_DEFAULTTONULL 0x00000000
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#define MONITOR_DEFAULTTOPRIMARY 0x00000001
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#define MONITOR_DEFAULTTONEAREST 0x00000002
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#define MONITORINFOF_PRIMARY 0x00000001
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typedef struct tagMONITORINFO
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{
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DWORD cbSize;
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RECT rcMonitor;
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RECT rcWork;
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DWORD dwFlags;
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} MONITORINFO, *LPMONITORINFO;
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#define CCHDEVICENAME 32
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#ifdef __cplusplus
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typedef struct tagMONITORINFOEX : public tagMONITORINFO
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{
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TCHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEX, *LPMONITORINFOEX;
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#else
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typedef struct
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{
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MONITORINFO;
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TCHAR szDevice[CCHDEVICENAME];
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} MONITORINFOEX, *LPMONITORINFOEX;
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#endif
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typedef BOOL (CALLBACK* MONITORENUMPROC)(HMONITOR, HDC, LPRECT, LPARAM);
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#endif // SM_CMONITORS
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#undef GetMonitorInfo
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#undef GetSystemMetrics
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#undef MonitorFromWindow
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#undef MonitorFromRect
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#undef MonitorFromPoint
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#undef EnumDisplayMonitors
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//
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// define this to compile the stubs
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// otherwise you get the declarations
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//
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#ifdef COMPILE_MULTIMON_STUBS
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//-----------------------------------------------------------------------------
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//
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// Implement the API stubs.
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//
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//-----------------------------------------------------------------------------
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int (WINAPI* g_pfnGetSystemMetrics)(int);
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HMONITOR (WINAPI* g_pfnMonitorFromWindow)(HWND, BOOL);
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HMONITOR (WINAPI* g_pfnMonitorFromRect)(LPCRECT, BOOL);
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HMONITOR (WINAPI* g_pfnMonitorFromPoint)(POINT, BOOL);
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BOOL (WINAPI* g_pfnGetMonitorInfo)(HMONITOR, LPMONITORINFO);
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BOOL (WINAPI* g_pfnEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
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BOOL InitMultipleMonitorStubs(void)
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{
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HMODULE hUser32;
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static BOOL fInitDone;
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if (fInitDone)
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{
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return g_pfnGetMonitorInfo != NULL;
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}
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if ((hUser32 = GetModuleHandle(TEXT("USER32"))) &&
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(*(FARPROC*)&g_pfnGetSystemMetrics = GetProcAddress(hUser32,"GetSystemMetrics")) &&
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(*(FARPROC*)&g_pfnMonitorFromWindow = GetProcAddress(hUser32,"MonitorFromWindow")) &&
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(*(FARPROC*)&g_pfnMonitorFromRect = GetProcAddress(hUser32,"MonitorFromRect")) &&
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(*(FARPROC*)&g_pfnMonitorFromPoint = GetProcAddress(hUser32,"MonitorFromPoint")) &&
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(*(FARPROC*)&g_pfnEnumDisplayMonitors = GetProcAddress(hUser32,"EnumDisplayMonitors")) &&
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#ifdef UNICODE
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(*(FARPROC*)&g_pfnGetMonitorInfo = GetProcAddress(hUser32,"GetMonitorInfoW")) &&
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#else
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(*(FARPROC*)&g_pfnGetMonitorInfo = GetProcAddress(hUser32,"GetMonitorInfoA")) )
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#endif
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{
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fInitDone = TRUE;
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return TRUE;
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}
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else
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{
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g_pfnGetSystemMetrics = NULL;
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g_pfnMonitorFromWindow = NULL;
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g_pfnMonitorFromRect = NULL;
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g_pfnMonitorFromPoint = NULL;
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g_pfnGetMonitorInfo = NULL;
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g_pfnEnumDisplayMonitors = NULL;
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fInitDone = TRUE;
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return FALSE;
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}
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}
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//-----------------------------------------------------------------------------
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//
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// fake implementations of Monitor APIs that work with the primary display
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// no special parameter validation is made since these run in client code
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//
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//-----------------------------------------------------------------------------
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int WINAPI
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xGetSystemMetrics(int nIndex)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnGetSystemMetrics(nIndex);
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switch (nIndex)
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{
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case SM_CMONITORS:
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case SM_SAMEDISPLAYFORMAT:
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return 1;
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case SM_XVIRTUALSCREEN:
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case SM_YVIRTUALSCREEN:
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return 0;
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case SM_CXVIRTUALSCREEN:
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nIndex = SM_CXSCREEN;
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break;
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case SM_CYVIRTUALSCREEN:
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nIndex = SM_CYSCREEN;
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break;
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}
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return GetSystemMetrics(nIndex);
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}
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#define xPRIMARY_MONITOR ((HMONITOR)0x42)
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HMONITOR WINAPI
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xMonitorFromRect(LPCRECT lprcScreenCoords, UINT uFlags)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromRect(lprcScreenCoords, uFlags);
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if ((uFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
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((lprcScreenCoords->right > 0) &&
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(lprcScreenCoords->bottom > 0) &&
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(lprcScreenCoords->left < GetSystemMetrics(SM_CXSCREEN)) &&
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(lprcScreenCoords->top < GetSystemMetrics(SM_CYSCREEN))))
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{
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return xPRIMARY_MONITOR;
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}
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return NULL;
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}
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HMONITOR WINAPI
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xMonitorFromWindow(HWND hWnd, UINT uFlags)
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{
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RECT rc;
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromWindow(hWnd, uFlags);
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if (uFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST))
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return xPRIMARY_MONITOR;
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if (GetWindowRect(hWnd, &rc))
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return xMonitorFromRect(&rc, uFlags);
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return NULL;
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}
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HMONITOR WINAPI
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xMonitorFromPoint(POINT ptScreenCoords, UINT uFlags)
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{
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if (InitMultipleMonitorStubs())
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return g_pfnMonitorFromPoint(ptScreenCoords, uFlags);
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if ((uFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) ||
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((ptScreenCoords.x >= 0) &&
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(ptScreenCoords.x < GetSystemMetrics(SM_CXSCREEN)) &&
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(ptScreenCoords.y >= 0) &&
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(ptScreenCoords.y < GetSystemMetrics(SM_CYSCREEN))))
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{
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return xPRIMARY_MONITOR;
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}
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return NULL;
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}
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BOOL WINAPI
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xGetMonitorInfo(HMONITOR hMonitor, LPMONITORINFO lpMonitorInfo)
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{
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RECT rcWork;
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if (InitMultipleMonitorStubs())
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return g_pfnGetMonitorInfo(hMonitor, lpMonitorInfo);
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if ((hMonitor == xPRIMARY_MONITOR) && lpMonitorInfo &&
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(lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) &&
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SystemParametersInfo(SPI_GETWORKAREA, 0, &rcWork, 0))
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{
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lpMonitorInfo->rcMonitor.left = 0;
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lpMonitorInfo->rcMonitor.top = 0;
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lpMonitorInfo->rcMonitor.right = GetSystemMetrics(SM_CXSCREEN);
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lpMonitorInfo->rcMonitor.bottom = GetSystemMetrics(SM_CYSCREEN);
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lpMonitorInfo->rcWork = rcWork;
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lpMonitorInfo->dwFlags = MONITORINFOF_PRIMARY;
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if (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX))
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lstrcpy(((MONITORINFOEX*)lpMonitorInfo)->szDevice, TEXT("DISPLAY"));
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return TRUE;
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}
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return FALSE;
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}
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BOOL WINAPI
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xEnumDisplayMonitors(
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HDC hdc,
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LPCRECT lprcIntersect,
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MONITORENUMPROC lpfnEnumProc,
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LPARAM lData)
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{
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RECT rcCallback, rcLimit;
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if (InitMultipleMonitorStubs())
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return g_pfnEnumDisplayMonitors(hdc,
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lprcIntersect, lpfnEnumProc, lData);
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if (!lpfnEnumProc)
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return FALSE;
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rcLimit.left = 0;
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rcLimit.top = 0;
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rcLimit.right = GetSystemMetrics(SM_CXSCREEN);
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rcLimit.bottom = GetSystemMetrics(SM_CYSCREEN);
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if (hdc)
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{
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RECT rcClip;
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HWND hWnd;
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if ((hWnd = WindowFromDC(hdc)) == NULL)
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return FALSE;
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switch (GetClipBox(hdc, &rcClip))
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{
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default:
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MapWindowPoints(NULL, hWnd, (LPPOINT)&rcLimit, 2);
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if (IntersectRect(&rcCallback, &rcClip, &rcLimit))
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break;
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//fall thru
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case NULLREGION:
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return TRUE;
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case ERROR:
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return FALSE;
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}
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rcLimit = rcCallback;
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}
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if (!lprcIntersect ||
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IntersectRect(&rcCallback, lprcIntersect, &rcLimit))
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{
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lpfnEnumProc(xPRIMARY_MONITOR, hdc, &rcCallback,lData);
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}
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return TRUE;
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}
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#undef xPRIMARY_MONITOR
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#undef COMPILE_MULTIMON_STUBS
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#else // COMPILE_MULTIMON_STUBS
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extern int WINAPI xGetSystemMetrics(int);
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extern HMONITOR WINAPI xMonitorFromWindow(HWND, UINT);
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extern HMONITOR WINAPI xMonitorFromRect(LPCRECT, UINT);
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extern HMONITOR WINAPI xMonitorFromPoint(POINT, UINT);
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extern BOOL WINAPI xGetMonitorInfo(HMONITOR, LPMONITORINFO);
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extern BOOL WINAPI xEnumDisplayMonitors(HDC, LPCRECT, MONITORENUMPROC, LPARAM);
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#endif // COMPILE_MULTIMON_STUBS
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//
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// build defines that replace the regular APIs with our versions
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//
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#define GetSystemMetrics xGetSystemMetrics
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#define MonitorFromWindow xMonitorFromWindow
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#define MonitorFromRect xMonitorFromRect
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#define MonitorFromPoint xMonitorFromPoint
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#define GetMonitorInfo xGetMonitorInfo
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#define EnumDisplayMonitors xEnumDisplayMonitors
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#ifdef __cplusplus
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}
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#endif /* __cplusplus */
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#endif /* !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500) */
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