Clear the screen to actual black based on the format of the screen.
Clear the screen to actual black based on the format of the screen.

Use a better texture format for YUV overlay software fallbacks


git-svn-id: 75429ccc2030f235ccf16e6b9b7f8e83d5edd22e@4147 c70aab31-4412-0410-b14c-859654838e24

albertz/sdl,albertz/sdl,albertz/sdl,albertz/sdl