From 193b491b63c5b2f1c6fcca100f747b8fd936be7e Mon Sep 17 00:00:00 2001
From: "alexey.lysiuk" <alexey.lysiuk@gmail.com>
Date: Sat, 4 Apr 2015 17:36:55 +0300
Subject: [PATCH] Added control of automatic graphics switching on OS X

Automatic graphics switching is enabled by default
Set vid_autoswitch CVAR to false to disable it
---
 src/posix/cocoa/i_video.mm     | 10 ++++++++++
 src/posix/osx/zdoom-info.plist |  2 ++
 2 files changed, 12 insertions(+)

diff --git a/src/posix/cocoa/i_video.mm b/src/posix/cocoa/i_video.mm
index 350202a13c..29e6bf4d4b 100644
--- a/src/posix/cocoa/i_video.mm
+++ b/src/posix/cocoa/i_video.mm
@@ -72,6 +72,11 @@ CUSTOM_CVAR(Bool, fullscreen, false, CVAR_ARCHIVE | CVAR_GLOBALCONFIG)
 	setmodeneeded = true;
 }
 
+CUSTOM_CVAR(Bool, vid_autoswitch, true, CVAR_ARCHIVE | CVAR_GLOBALCONFIG | CVAR_NOINITCALL)
+{
+	Printf("You must restart " GAMENAME " to apply graphics switching mode\n");
+}
+
 
 RenderBufferOptions rbOpts;
 
@@ -399,6 +404,11 @@ CocoaVideo::CocoaVideo(const int multisample)
 	attributes[i++] = NSOpenGLPFAStencilSize;
 	attributes[i++] = NSOpenGLPixelFormatAttribute(8);
 
+	if (!vid_autoswitch)
+	{
+		attributes[i++] = NSOpenGLPFAAllowOfflineRenderers;
+	}
+
 	if (multisample)
 	{
 		attributes[i++] = NSOpenGLPFAMultisample;
diff --git a/src/posix/osx/zdoom-info.plist b/src/posix/osx/zdoom-info.plist
index 2a1911cdfa..73be09aa8f 100644
--- a/src/posix/osx/zdoom-info.plist
+++ b/src/posix/osx/zdoom-info.plist
@@ -43,5 +43,7 @@
 	</array>
 	<key>NSPrincipalClass</key>
 	<string>NSApplication</string>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<string>YES</string>
 </dict>
 </plist>