Cocoa Port: Support Automatic Graphics Switching, allowing the use of the integrated GPU to run video display windows. (Requires a dual-GPU MacBook Pro with Metal-capable GPUs.)

- While this results in a 20% performance loss for video display window functions (like video filters), this also dramatically extends battery life. To return to the old way of using the discrete GPU for video display windows, the user must disable Automatic Graphics Switching in their System Preferences.
- The Troubleshooting Window now correctly reports the emulated 3D renderer that is currently active, rather than the one that is selected in the GUI.
- Also fix a bug where creating a OpenGL 3D renderer's context would immediately fall back to Apple Software Renderer if context creation failed. Now, context creation falls back to Apple Software Renderer as the last resort, only after all other Core Profile contexts have failed.

Author: rogerman

desmume/src/frontend/cocoa/Info (Debug).plist

@@ -4,6 +4,8 @@
 <dict>
 	<key>NSRequiresAquaSystemAppearance</key>
 	<false/>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<true/>
 	<key>NSMicrophoneUsageDescription</key>
 	<string>DeSmuME requires your host microphone to emulate the NDS microphone.</string>
 	<key>CFBundleDevelopmentRegion</key>

desmume/src/frontend/cocoa/Info.plist

@@ -4,6 +4,8 @@
 <dict>
 	<key>NSRequiresAquaSystemAppearance</key>
 	<false/>
+	<key>NSSupportsAutomaticGraphicsSwitching</key>
+	<true/>
 	<key>NSMicrophoneUsageDescription</key>
 	<string>DeSmuME requires your host microphone to emulate the NDS microphone.</string>
 	<key>CFBundleDevelopmentRegion</key>

desmume/src/frontend/cocoa/cocoa_GPU.h

@@ -1,5 +1,5 @@
 /*
-	Copyright (C) 2013-2022 DeSmuME team
+	Copyright (C) 2013-2025 DeSmuME team
 
 	This file is free software: you can redistribute it and/or modify
 	it under the terms of the GNU General Public License as published by
@@ -238,6 +238,9 @@ class GPUEventHandlerAsync_Stub : public GPUEventHandlerAsync
 @property (assign) BOOL layerSubOBJ;
 
 @property (assign) NSInteger render3DRenderingEngine;
+@property (readonly) NSInteger render3DRenderingEngineApplied;
+@property (readonly) NSInteger render3DRenderingEngineAppliedHostRendererID;
+@property (readonly) NSString *render3DRenderingEngineAppliedHostRendererName;
 @property (assign) BOOL render3DHighPrecisionColorInterpolation;
 @property (assign) BOOL render3DEdgeMarking;
 @property (assign) BOOL render3DFog;
@@ -261,7 +264,6 @@ class GPUEventHandlerAsync_Stub : public GPUEventHandlerAsync
 #endif
 
 - (BOOL) gpuStateByBit:(const UInt32)stateBit;
-- (NSString *) render3DRenderingEngineString;
 - (void) clearWithColor:(const uint16_t)colorBGRA5551;
 - (void) respondToPauseState:(BOOL)isPaused;