Make binding expose the preferred format
diff --git a/examples/HelloTriangle.cpp b/examples/HelloTriangle.cpp
index f540fc3..18821d3 100644
--- a/examples/HelloTriangle.cpp
+++ b/examples/HelloTriangle.cpp
@@ -83,7 +83,8 @@
 
     queue = device.CreateQueueBuilder().GetResult();
     swapchain = GetSwapChain(device);
-    swapchain.Configure(nxt::TextureFormat::R8G8B8A8Unorm, nxt::TextureUsageBit::OutputAttachment, 640, 480);
+    swapchain.Configure(GetPreferredSwapChainTextureFormat(),
+                        nxt::TextureUsageBit::OutputAttachment, 640, 480);
 
     initBuffers();
     initTextures();