fix begin render pass

src/Graphics/CommandBuffer.cs

@@ -72,22 +72,32 @@ namespace MoonWorks.Graphics
             RenderPass renderPass,
             Framebuffer framebuffer,
             in Rect renderArea,
-            params Color[] clearColors
+            params Vector4[] clearColors
         ) {
-            fixed (Color* clearColorPtr = &clearColors[0])
+            Refresh.Vec4* colors = stackalloc Refresh.Vec4[clearColors.Length];
+
+            for (var i = 0; i < clearColors.Length; i++)
             {
+                colors[i] = new Refresh.Vec4
+                {
+                    x = clearColors[i].X,
+                    y = clearColors[i].Y,
+                    z = clearColors[i].Z,
+                    w = clearColors[i].W
+                };
+            }
+
             Refresh.Refresh_BeginRenderPass(
                 Device.Handle,
                 Handle,
                 renderPass.Handle,
                 framebuffer.Handle,
                 renderArea.ToRefresh(),
-                    (IntPtr) clearColorPtr,
+                (IntPtr) colors,
                 (uint) clearColors.Length,
                 IntPtr.Zero
             );
         }
-        }
 
         public void BindComputePipeline(
             ComputePipeline computePipeline