Optimize CommandBuffer (#35)

- remove params methods in favor of overloads and last-resort `in Span<T>` overloads
- add `in` to params that take structs to reduce unnecessary copying
- Buffer can now implicitly cast to BufferBinding
- add render pass / graphics pipeline format match validation

Reviewed-on: #35

src/Graphics/Resources/Buffer.cs

@@ -1,5 +1,4 @@
 using System;
-using System.Runtime.InteropServices;
 using RefreshCS;
 
 namespace MoonWorks.Graphics
@@ -78,5 +77,10 @@ namespace MoonWorks.Graphics
 				);
 			}
 		}
+
+		public static implicit operator BufferBinding(Buffer b)
+		{
+			return new BufferBinding(b, 0);
+		}
 	}
 }

src/Graphics/Resources/GraphicsPipeline.cs

@@ -14,7 +14,11 @@ namespace MoonWorks.Graphics
 
 		public GraphicsShaderInfo VertexShaderInfo { get; }
 		public GraphicsShaderInfo FragmentShaderInfo { get; }
-		internal SampleCount SampleCount { get; }
+		public  SampleCount SampleCount { get; }
+
+#if DEBUG
+		internal GraphicsPipelineAttachmentInfo AttachmentInfo { get; }
+#endif
 
 		public unsafe GraphicsPipeline(
 			GraphicsDevice device,
@@ -113,6 +117,10 @@ namespace MoonWorks.Graphics
 			VertexShaderInfo = vertexShaderInfo;
 			FragmentShaderInfo = fragmentShaderInfo;
 			SampleCount = multisampleState.MultisampleCount;
+
+#if DEBUG
+			AttachmentInfo = attachmentInfo;
+#endif
 		}
 	}
 }