142 lines
4.2 KiB
C
142 lines
4.2 KiB
C
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// Copyright (c) 1999 Microsoft Corporation. All Rights Reserved.
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#ifdef COMPILE_MULTIMON_STUBS
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#define COMPILE_MULTIMON_STUBS2
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#endif
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#if !defined(_WIN32_WINNT) || (_WIN32_WINNT < 0x0500)
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#include <multimon.h>
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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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#undef ChangeDisplaySettingsEx
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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_STUBS2
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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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BOOL (WINAPI* g_pfnChangeDisplaySettingsEx)(LPCSTR, LPDEVMODE, HWND, DWORD, LPVOID);
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BOOL InitMultipleMonitorStubs2(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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#ifdef UNICODE
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(*(FARPROC*)&g_pfnChangeDisplaySettingsEx = GetProcAddress(hUser32,"ChangeDisplaySettingsExW")) &&
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#else
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(*(FARPROC*)&g_pfnChangeDisplaySettingsEx = GetProcAddress(hUser32,"ChangeDisplaySettingsExA")) &&
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#endif
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//
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// Old builds of Memphis had different indices for these metrics, and
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// some of the APIs and structs have changed since then, so validate that
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// the returned metrics are not totally messed up. (for example on an old
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// Memphis build, the new index for SM_CYVIRTUALSCREEN will fetch 0)
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//
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// If this is preventing you from using the shell on secondary monitors
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// under Memphis then upgrade to a new Memphis build that is in sync with
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// the current version of the multi-monitor APIs.
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//
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(GetSystemMetrics(SM_CXVIRTUALSCREEN) >= GetSystemMetrics(SM_CXSCREEN)) &&
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(GetSystemMetrics(SM_CYVIRTUALSCREEN) >= GetSystemMetrics(SM_CYSCREEN)) )
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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_pfnChangeDisplaySettingsEx = 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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#ifdef UNICODE
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LONG WINAPI
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xChangeDisplaySettingsExW(LPCSTR lpszDeviceName, LPDEVMODEW lpDevMode,
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HWND hwnd, DWORD dwflags, LPVOID lParam)
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{
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if (InitMultipleMonitorStubs2())
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return g_pfnChangeDisplaySettingsEx(lpszDeviceName, lpDevMode, hwnd,
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dwflags, lParam) ;
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// Otherwise return DISP_CHANGE_SUCCESSFUL, because OS doesn't support it
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return DISP_CHANGE_SUCCESSFUL ; // what else?
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}
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#else
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LONG WINAPI
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xChangeDisplaySettingsExA(LPCSTR lpszDeviceName, LPDEVMODEA lpDevMode,
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HWND hwnd, DWORD dwflags, LPVOID lParam)
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{
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if (InitMultipleMonitorStubs2())
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return g_pfnChangeDisplaySettingsEx(lpszDeviceName, lpDevMode, hwnd,
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dwflags, lParam) ;
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// Otherwise return DISP_CHANGE_SUCCESSFUL, because OS doesn't support it
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return DISP_CHANGE_SUCCESSFUL ; // what else?
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}
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#endif // UNICODE
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#undef COMPILE_MULTIMON_STUBS2
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#else // COMPILE_MULTIMON_STUBS2
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#ifdef UNICODE
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extern LONG WINAPI xChangeDisplaySettingsExW(LPCSTR, LPDEVMODE, HWND, DWORD, LPVOID);
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#else
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extern LONG WINAPI xChangeDisplaySettingsExA(LPCSTR, LPDEVMODE, HWND, DWORD, LPVOID);
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#endif
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#endif // COMPILE_MULTIMON_STUBS2
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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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#ifdef UNICODE
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#define ChangeDisplaySettingsEx xChangeDisplaySettingsExW
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#else
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#define ChangeDisplaySettingsEx xChangeDisplaySettingsExA
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#define ChangeDisplaySettingsExA xChangeDisplaySettingsExA
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#endif
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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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