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484 lines
14 KiB
484 lines
14 KiB
//============================================================================= |
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// |
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// multimon.h -- Stub module that fakes multiple monitor apis on Win32 OSes |
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// without them. |
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// |
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// By using this header your code will get back default values from |
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// GetSystemMetrics() for new metrics, and the new multimonitor APIs |
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// will act like only one display is present on a Win32 OS without |
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// multimonitor APIs. |
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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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// Copyright (c) Microsoft Corporation. All rights reserved. |
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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 with Win95/NT4 headers, we need to declare |
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// the multimonitor-related metrics and APIs 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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// HMONITOR is already declared if WINVER >= 0x0500 in windef.h |
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// This is for components built with an older version number. |
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// |
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#if !defined(HMONITOR_DECLARED) && (WINVER < 0x0500) |
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DECLARE_HANDLE(HMONITOR); |
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#define HMONITOR_DECLARED |
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#endif |
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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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#ifndef CCHDEVICENAME |
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#define CCHDEVICENAME 32 |
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#endif |
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#ifdef __cplusplus |
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typedef struct tagMONITORINFOEXA : public tagMONITORINFO |
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{ |
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CHAR szDevice[CCHDEVICENAME]; |
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} MONITORINFOEXA, *LPMONITORINFOEXA; |
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typedef struct tagMONITORINFOEXW : public tagMONITORINFO |
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{ |
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WCHAR szDevice[CCHDEVICENAME]; |
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} MONITORINFOEXW, *LPMONITORINFOEXW; |
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#ifdef UNICODE |
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typedef MONITORINFOEXW MONITORINFOEX; |
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typedef LPMONITORINFOEXW LPMONITORINFOEX; |
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#else |
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typedef MONITORINFOEXA MONITORINFOEX; |
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typedef LPMONITORINFOEXA LPMONITORINFOEX; |
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#endif // UNICODE |
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#else // ndef __cplusplus |
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typedef struct tagMONITORINFOEXA |
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{ |
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MONITORINFO; |
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CHAR szDevice[CCHDEVICENAME]; |
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} MONITORINFOEXA, *LPMONITORINFOEXA; |
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typedef struct tagMONITORINFOEXW |
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{ |
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MONITORINFO; |
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WCHAR szDevice[CCHDEVICENAME]; |
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} MONITORINFOEXW, *LPMONITORINFOEXW; |
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#ifdef UNICODE |
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typedef MONITORINFOEXW MONITORINFOEX; |
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typedef LPMONITORINFOEXW LPMONITORINFOEX; |
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#else |
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typedef MONITORINFOEXA MONITORINFOEX; |
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typedef LPMONITORINFOEXA LPMONITORINFOEX; |
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#endif // UNICODE |
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#endif |
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typedef BOOL (CALLBACK* MONITORENUMPROC)(HMONITOR, HDC, LPRECT, LPARAM); |
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#ifndef DISPLAY_DEVICE_ATTACHED_TO_DESKTOP |
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typedef struct _DISPLAY_DEVICEA { |
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DWORD cb; |
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CHAR DeviceName[32]; |
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CHAR DeviceString[128]; |
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DWORD StateFlags; |
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CHAR DeviceID[128]; |
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CHAR DeviceKey[128]; |
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} DISPLAY_DEVICEA, *PDISPLAY_DEVICEA, *LPDISPLAY_DEVICEA; |
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typedef struct _DISPLAY_DEVICEW { |
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DWORD cb; |
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WCHAR DeviceName[32]; |
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WCHAR DeviceString[128]; |
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DWORD StateFlags; |
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WCHAR DeviceID[128]; |
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WCHAR DeviceKey[128]; |
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} DISPLAY_DEVICEW, *PDISPLAY_DEVICEW, *LPDISPLAY_DEVICEW; |
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#ifdef UNICODE |
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typedef DISPLAY_DEVICEW DISPLAY_DEVICE; |
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typedef PDISPLAY_DEVICEW PDISPLAY_DEVICE; |
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typedef LPDISPLAY_DEVICEW LPDISPLAY_DEVICE; |
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#else |
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typedef DISPLAY_DEVICEA DISPLAY_DEVICE; |
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typedef PDISPLAY_DEVICEA PDISPLAY_DEVICE; |
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typedef LPDISPLAY_DEVICEA LPDISPLAY_DEVICE; |
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#endif // UNICODE |
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#define DISPLAY_DEVICE_ATTACHED_TO_DESKTOP 0x00000001 |
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#define DISPLAY_DEVICE_MULTI_DRIVER 0x00000002 |
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#define DISPLAY_DEVICE_PRIMARY_DEVICE 0x00000004 |
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#define DISPLAY_DEVICE_MIRRORING_DRIVER 0x00000008 |
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#define DISPLAY_DEVICE_VGA_COMPATIBLE 0x00000010 |
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#endif |
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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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#undef EnumDisplayDevices |
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// |
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// Define COMPILE_MULTIMON_STUBS 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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#ifndef MULTIMON_FNS_DEFINED |
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int (WINAPI* g_pfnGetSystemMetrics)(int) = NULL; |
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HMONITOR (WINAPI* g_pfnMonitorFromWindow)(HWND, DWORD) = NULL; |
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HMONITOR (WINAPI* g_pfnMonitorFromRect)(LPCRECT, DWORD) = NULL; |
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HMONITOR (WINAPI* g_pfnMonitorFromPoint)(POINT, DWORD) = NULL; |
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BOOL (WINAPI* g_pfnGetMonitorInfo)(HMONITOR, LPMONITORINFO) = NULL; |
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BOOL (WINAPI* g_pfnEnumDisplayMonitors)(HDC, LPCRECT, MONITORENUMPROC, LPARAM) = NULL; |
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BOOL (WINAPI* g_pfnEnumDisplayDevices)(PVOID, DWORD, PDISPLAY_DEVICE,DWORD) = NULL; |
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BOOL g_fMultiMonInitDone = FALSE; |
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BOOL g_fMultimonPlatformNT = FALSE; |
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#endif |
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BOOL IsPlatformNT() |
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{ |
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OSVERSIONINFOA osvi = {0}; |
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osvi.dwOSVersionInfoSize = sizeof(osvi); |
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GetVersionExA((OSVERSIONINFOA*)&osvi); |
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return (VER_PLATFORM_WIN32_NT == osvi.dwPlatformId); |
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} |
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BOOL InitMultipleMonitorStubs(void) |
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{ |
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HMODULE hUser32; |
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if (g_fMultiMonInitDone) |
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{ |
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return g_pfnGetMonitorInfo != NULL; |
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} |
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g_fMultimonPlatformNT = IsPlatformNT(); |
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hUser32 = GetModuleHandle(TEXT("USER32")); |
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if (hUser32 && |
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(*(FARPROC*)&g_pfnGetSystemMetrics = GetProcAddress(hUser32,"GetSystemMetrics")) != NULL && |
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(*(FARPROC*)&g_pfnMonitorFromWindow = GetProcAddress(hUser32,"MonitorFromWindow")) != NULL && |
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(*(FARPROC*)&g_pfnMonitorFromRect = GetProcAddress(hUser32,"MonitorFromRect")) != NULL && |
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(*(FARPROC*)&g_pfnMonitorFromPoint = GetProcAddress(hUser32,"MonitorFromPoint")) != NULL && |
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(*(FARPROC*)&g_pfnEnumDisplayMonitors = GetProcAddress(hUser32,"EnumDisplayMonitors")) != NULL && |
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#ifdef UNICODE |
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(*(FARPROC*)&g_pfnEnumDisplayDevices = GetProcAddress(hUser32,"EnumDisplayDevicesW")) != NULL && |
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(*(FARPROC*)&g_pfnGetMonitorInfo = g_fMultimonPlatformNT ? GetProcAddress(hUser32,"GetMonitorInfoW") : |
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GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL |
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#else |
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(*(FARPROC*)&g_pfnGetMonitorInfo = GetProcAddress(hUser32,"GetMonitorInfoA")) != NULL && |
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(*(FARPROC*)&g_pfnEnumDisplayDevices = GetProcAddress(hUser32,"EnumDisplayDevicesA")) != NULL |
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#endif |
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) { |
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g_fMultiMonInitDone = 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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g_pfnEnumDisplayDevices = NULL; |
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g_fMultiMonInitDone = 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)0x12340042) |
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HMONITOR WINAPI |
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xMonitorFromPoint(POINT ptScreenCoords, DWORD dwFlags) |
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{ |
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if (InitMultipleMonitorStubs()) |
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return g_pfnMonitorFromPoint(ptScreenCoords, dwFlags); |
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if ((dwFlags & (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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HMONITOR WINAPI |
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xMonitorFromRect(LPCRECT lprcScreenCoords, DWORD dwFlags) |
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{ |
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if (InitMultipleMonitorStubs()) |
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return g_pfnMonitorFromRect(lprcScreenCoords, dwFlags); |
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if ((dwFlags & (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, DWORD dwFlags) |
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{ |
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WINDOWPLACEMENT wp; |
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if (InitMultipleMonitorStubs()) |
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return g_pfnMonitorFromWindow(hWnd, dwFlags); |
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if (dwFlags & (MONITOR_DEFAULTTOPRIMARY | MONITOR_DEFAULTTONEAREST)) |
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return xPRIMARY_MONITOR; |
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if (IsIconic(hWnd) ? |
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GetWindowPlacement(hWnd, &wp) : |
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GetWindowRect(hWnd, &wp.rcNormalPosition)) { |
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return xMonitorFromRect(&wp.rcNormalPosition, dwFlags); |
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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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{ |
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BOOL f = g_pfnGetMonitorInfo(hMonitor, lpMonitorInfo); |
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#ifdef UNICODE |
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if (f && !g_fMultimonPlatformNT && (lpMonitorInfo->cbSize >= sizeof(MONITORINFOEX))) |
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{ |
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MultiByteToWideChar(CP_ACP, 0, |
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(LPSTR)((MONITORINFOEX*)lpMonitorInfo)->szDevice, -1, |
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((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR))); |
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} |
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#endif |
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return f; |
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} |
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if ((hMonitor == xPRIMARY_MONITOR) && |
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lpMonitorInfo && |
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(lpMonitorInfo->cbSize >= sizeof(MONITORINFO)) && |
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SystemParametersInfoA(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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{ |
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#ifdef UNICODE |
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, ((MONITORINFOEX*)lpMonitorInfo)->szDevice, (sizeof(((MONITORINFOEX*)lpMonitorInfo)->szDevice)/sizeof(TCHAR))); |
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#else // UNICODE |
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lstrcpy(((MONITORINFOEX*)lpMonitorInfo)->szDevice, TEXT("DISPLAY")); |
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#endif // UNICODE |
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} |
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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 hdcOptionalForPainting, |
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LPCRECT lprcEnumMonitorsThatIntersect, |
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MONITORENUMPROC lpfnEnumProc, |
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LPARAM dwData) |
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{ |
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RECT rcLimit; |
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if (InitMultipleMonitorStubs()) { |
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return g_pfnEnumDisplayMonitors( |
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hdcOptionalForPainting, |
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lprcEnumMonitorsThatIntersect, |
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lpfnEnumProc, |
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dwData); |
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} |
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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 (hdcOptionalForPainting) |
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{ |
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RECT rcClip; |
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POINT ptOrg; |
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switch (GetClipBox(hdcOptionalForPainting, &rcClip)) |
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{ |
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default: |
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if (!GetDCOrgEx(hdcOptionalForPainting, &ptOrg)) |
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return FALSE; |
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OffsetRect(&rcLimit, -ptOrg.x, -ptOrg.y); |
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if (IntersectRect(&rcLimit, &rcLimit, &rcClip) && |
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(!lprcEnumMonitorsThatIntersect || |
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IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect))) { |
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break; |
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} |
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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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} else { |
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if ( lprcEnumMonitorsThatIntersect && |
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!IntersectRect(&rcLimit, &rcLimit, lprcEnumMonitorsThatIntersect)) { |
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return TRUE; |
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} |
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} |
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return lpfnEnumProc( |
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xPRIMARY_MONITOR, |
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hdcOptionalForPainting, |
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&rcLimit, |
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dwData); |
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} |
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BOOL WINAPI |
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xEnumDisplayDevices( |
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PVOID Unused, |
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DWORD iDevNum, |
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PDISPLAY_DEVICE lpDisplayDevice, |
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DWORD dwFlags) |
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{ |
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if (InitMultipleMonitorStubs()) |
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return g_pfnEnumDisplayDevices(Unused, iDevNum, lpDisplayDevice, dwFlags); |
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if (Unused != NULL) |
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return FALSE; |
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if (iDevNum != 0) |
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return FALSE; |
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if (lpDisplayDevice == NULL || lpDisplayDevice->cb < sizeof(DISPLAY_DEVICE)) |
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return FALSE; |
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#ifdef UNICODE |
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceName, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR))); |
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MultiByteToWideChar(CP_ACP, 0, "DISPLAY", -1, lpDisplayDevice->DeviceString, (sizeof(lpDisplayDevice->DeviceName)/sizeof(TCHAR))); |
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#else // UNICODE |
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lstrcpy((LPTSTR)lpDisplayDevice->DeviceName, TEXT("DISPLAY")); |
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lstrcpy((LPTSTR)lpDisplayDevice->DeviceString, TEXT("DISPLAY")); |
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#endif // UNICODE |
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lpDisplayDevice->StateFlags = DISPLAY_DEVICE_ATTACHED_TO_DESKTOP | DISPLAY_DEVICE_PRIMARY_DEVICE; |
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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, DWORD); |
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extern HMONITOR WINAPI xMonitorFromRect(LPCRECT, DWORD); |
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extern HMONITOR WINAPI xMonitorFromPoint(POINT, DWORD); |
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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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extern BOOL WINAPI xEnumDisplayDevices(PVOID, DWORD, PDISPLAY_DEVICE, DWORD); |
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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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#define EnumDisplayDevices xEnumDisplayDevices |
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#ifdef __cplusplus |
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} |
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#endif // __cplusplus |
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