From 8a47e7e49361180498094ae5e41aa1f75958c025 Mon Sep 17 00:00:00 2001
From: N00byKing <N00byKing@users.noreply.github.com>
Date: Thu, 19 Apr 2018 20:22:26 +0200
Subject: [PATCH] Implement Pull #3528 from citra: use nvidia graphics
 automatically on laptops with optimus (with AMD support) (#271)

* Port 3528: use nvidia graphics automatically on laptops with optimus

* Force dedicated AMD Card for switchable Graphics

* Ran clang-format
---
 src/yuzu/main.cpp     | 9 +++++++++
 src/yuzu_cmd/yuzu.cpp | 9 +++++++++
 2 files changed, 18 insertions(+)

diff --git a/src/yuzu/main.cpp b/src/yuzu/main.cpp
index 534145f7e5..20796e92c3 100644
--- a/src/yuzu/main.cpp
+++ b/src/yuzu/main.cpp
@@ -44,6 +44,15 @@
 Q_IMPORT_PLUGIN(QWindowsIntegrationPlugin);
 #endif
 
+#ifdef _WIN32
+extern "C" {
+// tells Nvidia and AMD drivers to use the dedicated GPU by default on laptops with switchable
+// graphics
+__declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
+__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+}
+#endif
+
 /**
  * "Callouts" are one-time instructional messages shown to the user. In the config settings, there
  * is a bitfield "callout_flags" options, used to track if a message has already been shown to the
diff --git a/src/yuzu_cmd/yuzu.cpp b/src/yuzu_cmd/yuzu.cpp
index 261312f628..a911404475 100644
--- a/src/yuzu_cmd/yuzu.cpp
+++ b/src/yuzu_cmd/yuzu.cpp
@@ -37,6 +37,15 @@
 #include "yuzu_cmd/config.h"
 #include "yuzu_cmd/emu_window/emu_window_sdl2.h"
 
+#ifdef _WIN32
+extern "C" {
+// tells Nvidia and AMD drivers to use the dedicated GPU by default on laptops with switchable
+// graphics
+__declspec(dllexport) unsigned long NvOptimusEnablement = 0x00000001;
+__declspec(dllexport) int AmdPowerXpressRequestHighPerformance = 1;
+}
+#endif
+
 static void PrintHelp(const char* argv0) {
     std::cout << "Usage: " << argv0
               << " [options] <filename>\n"