Revert "Run graphics rendering on a dedicated thread."

This reverts commit b9be52c5428d4a3862d62fe3a2c01663bd3692c3.

OpenRA.Platforms.Default/FrameBuffer.cs

@@ -18,12 +18,12 @@ namespace OpenRA.Platforms.Default
 {
 	sealed class FrameBuffer : ThreadAffine, IFrameBuffer
 	{
-		readonly ITexture texture;
+		readonly Texture texture;
 		readonly Size size;
 		uint framebuffer, depth;
 		bool disposed;
 
-		public FrameBuffer(Size size, ITextureInternal texture)
+		public FrameBuffer(Size size)
 		{
 			this.size = size;
 			if (!Exts.IsPowerOf2(size.Width) || !Exts.IsPowerOf2(size.Height))
@@ -35,7 +35,7 @@ namespace OpenRA.Platforms.Default
 			OpenGL.CheckGLError();
 
 			// Color
-			this.texture = texture;
+			texture = new Texture();
 			texture.SetEmpty(size.Width, size.Height);
 			OpenGL.glFramebufferTexture2D(OpenGL.FRAMEBUFFER_EXT, OpenGL.COLOR_ATTACHMENT0_EXT, OpenGL.GL_TEXTURE_2D, texture.ID, 0);
 			OpenGL.CheckGLError();
@@ -120,9 +120,14 @@ namespace OpenRA.Platforms.Default
 			}
 		}
 
+		~FrameBuffer()
+		{
+			Game.RunAfterTick(() => Dispose(false));
+		}
+
 		public void Dispose()
 		{
-			Dispose(true);
+			Game.RunAfterTick(() => Dispose(true));
 			GC.SuppressFinalize(this);
 		}