add validation checks for AcquireSwapchainTexture and BindVertexBuffers

src/Graphics/CommandBuffer.cs

@@ -841,6 +841,10 @@ namespace MoonWorks.Graphics
 			in BufferBinding bufferBinding,
 			uint firstBinding = 0
 		) {
+#if DEBUG
+			AssertGraphicsPipelineBound();
+#endif
+
 			var bufferPtrs = stackalloc IntPtr[1];
 			var offsets = stackalloc ulong[1];
 
@@ -868,6 +872,10 @@ namespace MoonWorks.Graphics
 			in BufferBinding bufferBindingTwo,
 			uint firstBinding = 0
 		) {
+#if DEBUG
+			AssertGraphicsPipelineBound();
+#endif
+
 			var bufferPtrs = stackalloc IntPtr[2];
 			var offsets = stackalloc ulong[2];
 
@@ -900,6 +908,10 @@ namespace MoonWorks.Graphics
 			in BufferBinding bufferBindingThree,
 			uint firstBinding = 0
 		) {
+#if DEBUG
+			AssertGraphicsPipelineBound();
+#endif
+
 			var bufferPtrs = stackalloc IntPtr[3];
 			var offsets = stackalloc ulong[3];
 
@@ -936,6 +948,10 @@ namespace MoonWorks.Graphics
 			in BufferBinding bufferBindingFour,
 			uint firstBinding = 0
 		) {
+#if DEBUG
+			AssertGraphicsPipelineBound();
+#endif
+
 			var bufferPtrs = stackalloc IntPtr[4];
 			var offsets = stackalloc ulong[4];
 
@@ -968,6 +984,10 @@ namespace MoonWorks.Graphics
 			in Span<BufferBinding> bufferBindings,
 			uint firstBinding = 0
 		) {
+#if DEBUG
+			AssertGraphicsPipelineBound();
+#endif
+
 			var bufferPtrs = stackalloc IntPtr[bufferBindings.Length];
 			var offsets = stackalloc ulong[bufferBindings.Length];
 
@@ -1617,6 +1637,12 @@ namespace MoonWorks.Graphics
 			Window window
 		)
 		{
+#if DEBUG
+			if (!window.Claimed)
+			{
+				throw new System.InvalidOperationException("Cannot acquire swapchain texture, window has not been claimed!");
+			}
+#endif
 			var texturePtr = Refresh.Refresh_AcquireSwapchainTexture(
 				Device.Handle,
 				Handle,