From 036d5463a6476570798898b46e5372ac576601ed Mon Sep 17 00:00:00 2001
From: Nikita Tsukanov <keks9n@gmail.com>
Date: Tue, 5 Mar 2024 15:06:08 +0600
Subject: [PATCH] Added UI thread rendering mode for fbdev (#14818)

---
 .../Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs  | 6 +++++-
 .../LinuxFramebufferPlatformOptions.cs                     | 7 +++++++
 2 files changed, 12 insertions(+), 1 deletion(-)

diff --git a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
index 76e527a39a..f8f6b92b3e 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
+++ b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatform.cs
@@ -60,9 +60,13 @@ namespace Avalonia.LinuxFramebuffer
 
             var opts = AvaloniaLocator.Current.GetService<LinuxFramebufferPlatformOptions>() ?? new LinuxFramebufferPlatformOptions();
 
+            var timer = opts.ShouldRenderOnUIThread
+                ? new UiThreadRenderTimer(opts.Fps)
+                : new DefaultRenderTimer(opts.Fps);
+            
             AvaloniaLocator.CurrentMutable
                 .Bind<IDispatcherImpl>().ToConstant(new ManagedDispatcherImpl(new ManualRawEventGrouperDispatchQueueDispatcherInputProvider(EventGrouperDispatchQueue)))
-                .Bind<IRenderTimer>().ToConstant(new DefaultRenderTimer(opts.Fps))
+                .Bind<IRenderTimer>().ToConstant(timer)
                 .Bind<ICursorFactory>().ToTransient<CursorFactoryStub>()
                 .Bind<IKeyboardDevice>().ToConstant(new KeyboardDevice())
                 .Bind<IPlatformIconLoader>().ToSingleton<LinuxFramebufferIconLoaderStub>()
diff --git a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs
index bf925bbd75..ec772df57c 100644
--- a/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs
+++ b/src/Linux/Avalonia.LinuxFramebuffer/LinuxFramebufferPlatformOptions.cs
@@ -10,5 +10,12 @@
         /// Default 60.
         /// </summary>
         public int Fps { get; set; } = 60;
+        
+        /// <summary>
+        /// Render directly on the UI thread instead of using a dedicated render thread.
+        /// This can be usable if your device don't have multiple cores to begin with.
+        /// This setting is false by default.
+        /// </summary>
+        public bool ShouldRenderOnUIThread { get; set; }
     }
 }