| Re: [AD] memory bitmap blending |
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- To: "Coordination of admins/developers of the game programming library Allegro" <alleg-developers@xxxxxxxxxx>
- Subject: Re: [AD] memory bitmap blending
- From: "Trent Gamblin" <trent@xxxxxxxxxx>
- Date: Fri, 12 Dec 2008 07:52:29 -0700 (MST)
On Fri, December 12, 2008 7:31 am, Elias Pschernig said:
> If DirectX doesn't support separate alpha, we could fall back to memory
> bending for the separate alpha modes there and add a way for users to
> query if accelerated separate-alpha blending is supported. I forgot if
> we already do this for something else, if not, then if DX doesn't
> support it it's probably an argument to not apply it.
I'm pretty sure dx supports them,
See http://msdn.microsoft.com/en-us/library/bb172599(VS.85).aspx
at the very bottom, SRCBLENDALPHA and DESTBLENDALPHA. If I understand
correctly those are the same as the OpenGL separate alpha variables.
Trent :{)>