Enable Loading backup from drive for GC for windows

takes about 60-90 seconds on loading
about the same speed ingame as running from the hard drive
changed to the correct flag for CreateFile

git-svn-id: https://dolphin-emu.googlecode.com/svn/trunk@2352 8ced0084-cf51-0410-be5f-012b33b47a6e

Source/Core/Core/Src/CoreParameter.cpp

@@ -92,7 +92,12 @@ bool SCoreStartupParameter::AutoSetup(EBootBios _BootBios)
 
 				// Check if we have a Wii disc
 				bWii = DiscIO::IsVolumeWiiDisc(pVolume);
-
+				if(bootDrive && bWii){
+			// TODO: (lpfaint99) determine why wii backup is not loading, maybe I am not waiting long enough :p
+					
+					PanicAlert("WII backup from drive not yet supported");
+					return false;
+				}
 				switch (pVolume->GetCountry())
 				{
 				case DiscIO::IVolume::COUNTRY_USA:

Source/Core/DiscIO/Src/DriveBlob.cpp

@@ -28,7 +28,8 @@ namespace DiscIO
 		path[2] = 0;
 		sprintf(path, "\\\\.\\%s", drive);
 
-		hDisc = CreateFile(path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE, NULL, OPEN_EXISTING, 0, NULL);
+		hDisc = CreateFile(path, GENERIC_READ, FILE_SHARE_READ | FILE_SHARE_WRITE,
+							NULL, OPEN_EXISTING, FILE_FLAG_RANDOM_ACCESS, NULL);
 		if (hDisc == INVALID_HANDLE_VALUE)
 		{		
 			PanicAlert("Load from DVD backup failed");

Source/Core/DolphinWX/Src/FrameTools.cpp

@@ -101,9 +101,10 @@ void CFrame::CreateMenu()
 	m_pMenuItemOpen = fileMenu->Append(wxID_OPEN, _T("&Open...\tCtrl+O"));
 	fileMenu->Append(wxID_REFRESH, _T("&Refresh"));
 	fileMenu->Append(IDM_BROWSE, _T("&Browse for ISOs..."));
-// change to test drive loading, currently very slow on win32, not tested on linux/os x
+// not tested on linux/os x
 // works ok on a virtual drive with GC Games, Wii games do not load
-#if 0
+// backups take about 60-90 seconds to load from real cd drive
+#ifdef _WIN32
 	wxMenu *externalDrive = new wxMenu;
 	fileMenu->AppendSubMenu(externalDrive, _T("&Load From Drive"));
 	GetAllRemovableDrives(&drives);