As a developer/C/C++
모니터 Enumerate
산에™
2012. 7. 18. 11:50
#include <atlstr.h> |
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#include <SetupApi.h> |
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#pragma comment(lib, "setupapi.lib") |
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|
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#define NAME_SIZE 128 |
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|
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const GUID GUID_CLASS_MONITOR = {0x4d36e96e, 0xe325, 0x11ce, 0xbf, 0xc1, 0x08, 0x00, 0x2b, 0xe1, 0x03, 0x18}; |
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|
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// Assumes hDevRegKey is valid |
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bool GetMonitorSizeFromEDID(const HKEY hDevRegKey, short& WidthMm, short& HeightMm) |
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{ |
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DWORD dwType, AcutalValueNameLength = NAME_SIZE; |
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TCHAR valueName[NAME_SIZE]; |
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|
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BYTE EDIDdata[1024]; |
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DWORD edidsize=sizeof(EDIDdata); |
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|
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for (LONG i = 0, retValue = ERROR_SUCCESS; retValue != ERROR_NO_MORE_ITEMS; ++i) |
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{ |
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retValue = RegEnumValue ( hDevRegKey, i, &valueName[0], |
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&AcutalValueNameLength, NULL, &dwType, |
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EDIDdata, // buffer |
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&edidsize); // buffer size |
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|
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if (retValue != ERROR_SUCCESS || 0 != _tcscmp(valueName,_T("EDID"))) |
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continue; |
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|
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WidthMm = ((EDIDdata[68] & 0xF0) << 4) + EDIDdata[66]; |
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HeightMm = ((EDIDdata[68] & 0x0F) << 8) + EDIDdata[67]; |
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|
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return true; // valid EDID found |
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} |
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|
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return false; // EDID not found |
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} |
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|
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bool GetSizeForDevID(const CString& TargetDevID, short& WidthMm, short& HeightMm) |
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{ |
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HDEVINFO devInfo = SetupDiGetClassDevsEx( |
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&GUID_CLASS_MONITOR, //class GUID |
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NULL, //enumerator |
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NULL, //HWND |
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DIGCF_PRESENT, // Flags //DIGCF_ALLCLASSES| |
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NULL, // device info, create a new one. |
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NULL, // machine name, local machine |
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NULL);// reserved |
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|
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if (NULL == devInfo) |
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return false; |
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|
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bool bRes = false; |
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|
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for (ULONG i=0; ERROR_NO_MORE_ITEMS != GetLastError(); ++i) |
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{ |
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SP_DEVINFO_DATA devInfoData; |
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memset(&devInfoData,0,sizeof(devInfoData)); |
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devInfoData.cbSize = sizeof(devInfoData); |
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|
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if (SetupDiEnumDeviceInfo(devInfo,i,&devInfoData)) |
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{ |
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HKEY hDevRegKey = SetupDiOpenDevRegKey(devInfo,&devInfoData, |
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DICS_FLAG_GLOBAL, 0, DIREG_DEV, KEY_READ); |
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|
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if(!hDevRegKey || (hDevRegKey == INVALID_HANDLE_VALUE)) |
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continue; |
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|
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bRes = GetMonitorSizeFromEDID(hDevRegKey, WidthMm, HeightMm); |
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|
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RegCloseKey(hDevRegKey); |
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} |
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} |
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SetupDiDestroyDeviceInfoList(devInfo); |
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return bRes; |
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} |
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|
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int _tmain(int argc, _TCHAR* argv[]) |
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{ |
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short WidthMm, HeightMm; |
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|
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DISPLAY_DEVICE dd; |
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dd.cb = sizeof(dd); |
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DWORD dev = 0; // device index |
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int id = 1; // monitor number, as used by Display Properties > Settings |
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|
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CString DeviceID; |
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bool bFoundDevice = false; |
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while (EnumDisplayDevices(0, dev, &dd, 0) && !bFoundDevice) |
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{ |
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DISPLAY_DEVICE ddMon; |
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ZeroMemory(&ddMon, sizeof(ddMon)); |
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ddMon.cb = sizeof(ddMon); |
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DWORD devMon = 0; |
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|
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while (EnumDisplayDevices(dd.DeviceName, devMon, &ddMon, 0) && !bFoundDevice) |
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{ |
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if (ddMon.StateFlags & DISPLAY_DEVICE_ACTIVE && |
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!(ddMon.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER)) |
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{ |
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DeviceID.Format (L"%s", ddMon.DeviceID); |
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DeviceID = DeviceID.Mid (8, DeviceID.Find (L"\\", 9) - 8); |
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|
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bFoundDevice = GetSizeForDevID(DeviceID, WidthMm, HeightMm); |
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} |
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devMon++; |
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|
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ZeroMemory(&ddMon, sizeof(ddMon)); |
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ddMon.cb = sizeof(ddMon); |
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} |
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|
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ZeroMemory(&dd, sizeof(dd)); |
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dd.cb = sizeof(dd); |
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dev++; |
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} |
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|
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return 0; |
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} |