Bridge managed render funcs to command buffers

managed/XCEngine.ScriptCore/InternalCalls.cs

@@ -549,7 +549,8 @@ namespace XCEngine
         internal static extern bool
             Rendering_ScriptableRenderContext_SetRasterPassManagedRenderFuncExecution(
                 ulong nativeHandle,
-                ulong rasterPassHandle);
+                ulong rasterPassHandle,
+                Action<Rendering.RenderGraphRasterContext> renderFunc);
 
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern bool
@@ -557,6 +558,12 @@ namespace XCEngine
                 ulong nativeHandle,
                 ulong rasterPassHandle);
 
+        [MethodImpl(MethodImplOptions.InternalCall)]
+        internal static extern bool
+            Rendering_CommandBuffer_ClearRenderTarget(
+                ulong nativeHandle,
+                ref Color color);
+
         [MethodImpl(MethodImplOptions.InternalCall)]
         internal static extern int
             Rendering_ScriptableRenderPipelinePlanningContext_GetRendererIndex(

managed/XCEngine.ScriptCore/Rendering/Core/CommandBuffer.cs

@@ -1,3 +1,5 @@
+using XCEngine;
+
 namespace XCEngine.Rendering
 {
     public sealed class CommandBuffer
@@ -9,10 +11,33 @@ namespace XCEngine.Rendering
 
         public CommandBuffer(
             string name)
+            : this(
+                name,
+                0ul)
+        {
+        }
+
+        internal CommandBuffer(
+            string name,
+            ulong nativeHandle)
         {
             this.name = name ?? string.Empty;
+            m_nativeHandle = nativeHandle;
         }
 
         public string name { get; set; }
+
+        public bool isValid => m_nativeHandle != 0ul;
+
+        public bool ClearRenderTarget(
+            Color color)
+        {
+            return m_nativeHandle != 0ul &&
+                   InternalCalls.Rendering_CommandBuffer_ClearRenderTarget(
+                       m_nativeHandle,
+                       ref color);
+        }
+
+        private readonly ulong m_nativeHandle;
     }
 }

managed/XCEngine.ScriptCore/Rendering/Graph/RenderGraphRasterPassBuilder.cs

@@ -373,17 +373,12 @@ namespace XCEngine.Rendering
                     break;
                 case RenderGraphRasterPassExecutionKind
                     .ManagedRenderFunc:
-                    // Managed command buffers are not bridged into native
-                    // graph execution yet, so the render func is invoked
-                    // during recording while native records the declared IO.
-                    m_renderFunc(
-                        new RenderGraphRasterContext(
-                            new CommandBuffer(m_passName)));
                     configuredExecution =
                         InternalCalls
                             .Rendering_ScriptableRenderContext_SetRasterPassManagedRenderFuncExecution(
                                 m_context.nativeHandle,
-                                nativePassHandle);
+                                nativePassHandle,
+                                m_renderFunc);
                     break;
                 default:
                     configuredExecution = false;
@@ -501,5 +496,24 @@ namespace XCEngine.Rendering
 
             return false;
         }
+
+        internal static bool InvokeManagedRenderFunc(
+            Action<RenderGraphRasterContext> renderFunc,
+            string passName,
+            ulong commandBufferHandle)
+        {
+            if (renderFunc == null ||
+                commandBufferHandle == 0ul)
+            {
+                return false;
+            }
+
+            renderFunc(
+                new RenderGraphRasterContext(
+                    new CommandBuffer(
+                        passName,
+                        commandBufferHandle)));
+            return true;
+        }
     }
 }