[Rendering] Minor tweaks;

Author: LittleCodingFox

Engine/Staple.Core/Rendering/RenderSystem/Backend/IRendererBackend.cs

@@ -15,6 +15,10 @@ internal interface IRendererBackend
 
     void Destroy();
 
+    void BeginFrame();
+
+    void EndFrame();
+
     void UpdateRenderMode(RenderModeFlags flags);
 
     void UpdateViewport(int width, int height);

Engine/Staple.Core/Rendering/RenderSystem/Backend/Impls/SDLGPU/SDLGPURendererBackend.cs

@@ -192,6 +192,14 @@ public void Destroy()
         }
     }
 
+    public void BeginFrame()
+    {
+    }
+
+    public void EndFrame()
+    {
+    }
+
     public IRenderCommand BeginCommand()
     {
         var commandBuffer = SDL.SDL_AcquireGPUCommandBuffer(device);

Engine/Staple.Core/Rendering/Windowing/RenderWindow.cs

@@ -124,6 +124,7 @@ private void SingleThreadLoop()
         while (window.ShouldClose == false && shouldStop == false)
         {
             PerformanceProfilerSystem.StartFrame();
+            RenderSystem.Backend.BeginFrame();
 
             Input.UpdateState();
 
@@ -311,6 +312,7 @@ private void MultiThreadedLoop()
         while (window.ShouldClose == false && shouldStop == false)
         {
             PerformanceProfilerSystem.StartFrame();
+            RenderSystem.Backend.BeginFrame();
 
             Input.UpdateState();
 
@@ -660,6 +662,8 @@ internal void RenderFrame(ref DateTime lastTime)
         {
             lastTime = current;
 
+            RenderSystem.Backend.EndFrame();
+
             return;
         }
 
@@ -686,6 +690,8 @@ internal void RenderFrame(ref DateTime lastTime)
 
         RenderSystem.Instance.OnFrame(frameCounter);
 
+        RenderSystem.Backend.EndFrame();
+
         PerformanceProfilerSystem.FinishFrame();
     }
 

Engine/Staple.Editor/StapleEditor.cs

@@ -846,8 +846,6 @@ private void NormalEditorLoop()
 
             var io = ImGui.GetIO();
 
-            //bgfx.touch(ClearView);
-
             if (window.width == 0 || window.height == 0)
             {
                 return;
@@ -856,6 +854,15 @@ private void NormalEditorLoop()
             io.DisplaySize = new Vector2(window.width, window.height);
             io.DisplayFramebufferScale = new Vector2(1, 1);
 
+            var clearCommand = RenderSystem.Backend.BeginCommand();
+
+            var clearPass = clearCommand.BeginRenderPass(null, CameraClearMode.SolidColor, ClearColor, new(0, 0, 1, 1),
+                Matrix4x4.Identity, Matrix4x4.Identity);
+
+            clearPass.Finish();
+
+            clearCommand.Submit();
+
             ThumbnailCache.OnFrameStart();
             EditorGUI.OnFrameStart();
             ImGuiProxy.instance.BeginFrame();