EXPERIMENTAL: Metal backend (#441)

This is not a continuation of the Metal backend; this is simply bringing
the branch up to date and merging it as-is behind an experiment.

---------

Co-authored-by: Isaac Marovitz <isaacryu@icloud.com>
Co-authored-by: Samuliak <samuliak77@gmail.com>
Co-authored-by: SamoZ256 <96914946+SamoZ256@users.noreply.github.com>
Co-authored-by: Isaac Marovitz <42140194+IsaacMarovitz@users.noreply.github.com>
Co-authored-by: riperiperi <rhy3756547@hotmail.com>
Co-authored-by: Gabriel A <gab.dark.100@gmail.com>

src/Ryujinx.Headless.SDL2/Metal/MetalWindow.cs

@@ -0,0 +1,47 @@
+using Ryujinx.Common.Configuration;
+using Ryujinx.Input.HLE;
+using Ryujinx.SDL2.Common;
+using SharpMetal.QuartzCore;
+using System.Runtime.Versioning;
+using static SDL2.SDL;
+
+namespace Ryujinx.Headless.SDL2.Metal
+{
+    [SupportedOSPlatform("macos")]
+    class MetalWindow : WindowBase
+    {
+        private CAMetalLayer _caMetalLayer;
+
+        public CAMetalLayer GetLayer()
+        {
+            return _caMetalLayer;
+        }
+
+        public MetalWindow(
+            InputManager inputManager,
+            GraphicsDebugLevel glLogLevel,
+            AspectRatio aspectRatio,
+            bool enableMouse,
+            HideCursorMode hideCursorMode, 
+            bool ignoreControllerApplet)
+            : base(inputManager, glLogLevel, aspectRatio, enableMouse, hideCursorMode, ignoreControllerApplet) { }
+
+        public override SDL_WindowFlags GetWindowFlags() => SDL_WindowFlags.SDL_WINDOW_METAL;
+
+        protected override void InitializeWindowRenderer()
+        {
+            void CreateLayer()
+            {
+                _caMetalLayer = new CAMetalLayer(SDL_Metal_GetLayer(SDL_Metal_CreateView(WindowHandle)));
+            }
+
+            SDL2Driver.MainThreadDispatcher?.Invoke(CreateLayer);
+        }
+
+        protected override void InitializeRenderer() { }
+
+        protected override void FinalizeWindowRenderer() { }
+
+        protected override void SwapBuffers() { }
+    }
+}

src/Ryujinx.Headless.SDL2/Program.cs

@@ -18,9 +18,11 @@ using Ryujinx.Graphics.GAL;
 using Ryujinx.Graphics.GAL.Multithreading;
 using Ryujinx.Graphics.Gpu;
 using Ryujinx.Graphics.Gpu.Shader;
+using Ryujinx.Graphics.Metal;
 using Ryujinx.Graphics.OpenGL;
 using Ryujinx.Graphics.Vulkan;
 using Ryujinx.Graphics.Vulkan.MoltenVK;
+using Ryujinx.Headless.SDL2.Metal;
 using Ryujinx.Headless.SDL2.OpenGL;
 using Ryujinx.Headless.SDL2.Vulkan;
 using Ryujinx.HLE;
@@ -510,9 +512,14 @@ namespace Ryujinx.Headless.SDL2
 
         private static WindowBase CreateWindow(Options options)
         {
-            return options.GraphicsBackend == GraphicsBackend.Vulkan
-                ? new VulkanWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet)
-                : new OpenGLWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet);
+            return options.GraphicsBackend switch
+            {
+                GraphicsBackend.Vulkan => new VulkanWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet),
+                GraphicsBackend.Metal => OperatingSystem.IsMacOS() ?
+                    new MetalWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableKeyboard, options.HideCursorMode, options.IgnoreControllerApplet) :
+                    throw new Exception("Attempted to use Metal renderer on non-macOS platform!"),
+                _ => new OpenGLWindow(_inputManager, options.LoggingGraphicsDebugLevel, options.AspectRatio, options.EnableMouse, options.HideCursorMode, options.IgnoreControllerApplet)
+            };
         }
 
         private static IRenderer CreateRenderer(Options options, WindowBase window)
@@ -544,6 +551,11 @@ namespace Ryujinx.Headless.SDL2
                     preferredGpuId);
             }
 
+            if (options.GraphicsBackend == GraphicsBackend.Metal && window is MetalWindow metalWindow && OperatingSystem.IsMacOS())
+            {
+                return new MetalRenderer(metalWindow.GetLayer);
+            }
+
             return new OpenGLRenderer();
         }
 

src/Ryujinx.Headless.SDL2/Ryujinx.Headless.SDL2.csproj

@@ -29,6 +29,7 @@
     <ProjectReference Include="..\Ryujinx.HLE\Ryujinx.HLE.csproj" />
     <ProjectReference Include="..\ARMeilleure\ARMeilleure.csproj" />
     <ProjectReference Include="..\Ryujinx.Graphics.OpenGL\Ryujinx.Graphics.OpenGL.csproj" />
+    <ProjectReference Include="..\Ryujinx.Graphics.Metal\Ryujinx.Graphics.Metal.csproj" />
     <ProjectReference Include="..\Ryujinx.Graphics.Gpu\Ryujinx.Graphics.Gpu.csproj" />
   </ItemGroup>