Switched the SDL 1.2 compatibility to use the window surface, so it's fast even when there's no hardware acceleration available. This means that the YUV overlay now uses software, but that's okay since fast YUV code should be using the textures now anyway.

The test programs in this directory tree are for demonstrating and
testing the functionality of the SDL library, and are placed in the
public domain.

October 28, 1997
--
	Sam Lantinga				(slouken@libsdl.org)