radeon 2d engine and alpha blending
Alex Deucher <agd5f-/[email protected]>
| Newsgroups | gmane.comp.freedesktop.xserver,gmane.comp.xfree86.devel |
|---|---|
| Message-ID | <[email protected]> |
According to marketing literature from ati, radeon hardware seems to support alpha and transparent BLTs. from the literature under 2D graphics: Support for Windows XP GDI extensions: Alpha BLT Transparent BLT Gradient Fill The databooks and DDKs also have several sections on doing transparent BLTs. is there any reason that this can't be used to accelerate alpha blending in the xserver? it seems like this has come up before and there was a reason it wouldn't work, but from the looks of it I can't see why it wouldn't. I'd try to implement it myself, but I'm not familiar enough if XAA to understand how it should be done. In the long run using the 3D engine is probably the way to go, but if it could be hacked up quickly using the 2D engine it might give a nice boost in the short term. Alex __________________________________ Do you Yahoo!? Free Pop-Up Blocker - Get it now http://companion.yahoo.com/