Just a quick question: This change here broke for one of my ports that uses DXT1 texture data, and the official SurfaceFormat enumeration does not have Dxt1a... is there a way for us to keep compatibility with XNA4 here without changing the game code/content? Fortunately the only real change I have to make to keep compatibility is to switch this back in MG-SDL2, so it's not too big of a deal.