[client/main] Added some code to use dedicated GPU on Windows (thanks to Hopson).

client/source/main.cpp

@@ -13,6 +13,19 @@
  */
 #include "ClientApplication.hpp"
 
+// Use discrete GPU by default in Windows
+// from https://gist.github.com/statico/6809850727c708f08458
+// Thanks to Hopson for pointing this out
+#ifdef _WIN32
+extern "C" {
+	// http://developer.download.nvidia.com/devzone/devcenter/gamegraphics/files/OptimusRenderingPolicies.pdf
+	__declspec(dllexport) DWORD NvOptimusEnablement = 0x00000001;
+
+	// https://gpuopen.com/amdpowerxpressrequesthighperformance/
+	__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+}
+#endif
+
 int main(int argc, char **argv) {
 	ClientApplication app(argc, argv);
 	app.run();