Re: [Dri-devel] GLUT_ALPHA?

[Daryll S. <da...@pr...>]

On Sun, Dec 19, 1999 at 12:48:16PM -0500, Josh Faust wrote:
> Whenever glutInitDisplayMode(... | GLUT_ALPHA | ...) is called, the
> program won't run, saying:
> 
> GLUT: Fatal Error in <programname>: visual with necessary capabilities
> not found.
> 
> Has this not been implemented yet into the DRI code, or should this not
> be happening?

Are you just asking for Alpha or are you asking for Alpha and depth. The
hardware doesn't support destination alpha with a depth buffer. It's a
limitation in the current Voodoo boards. (Most of the time you don't
need destination alpha anyway)

You should be able to request just alpha, and no depth, but in fact, I
didn't enabled that visual type. It would require more work to make that
work correctly.

						- |Daryll