Enable discrete GPU if possible on Windows dual-GPU configuration

project/src/system/System.cpp

@@ -46,6 +46,18 @@ namespace lime {
 }
 
 
+#ifdef HX_WINDOWS
+
+extern "C" {
+	
+	_declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+	_declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+	
+}
+
+#endif
+
+
 #ifdef HX_LINUX
 
 // Improve compatibility with old glibc