I realize that I could attempt to use it for render accel, but I was hoping to tie it into Keithp's compositing extension (http://www.freedesktop.org/Software/TranslucentWindows) to support alpha blended windows, not just hw accelerated AA text. Although thinking about it more, I guess the compositing manager could take advantage of the render accel to accelerate alpha blending.
> Transparent bitblits are supported by XAA's normal bitblit functions, how are these used? are there any apps that use them? render? Alex --- Thomas Winischhofer <[EMAIL PROTECTED]> wrote: > Alex Deucher wrote: > > 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. > > I'm almost too embarrased to say that (twice a day) - but as regards > alpha blended bitblits have a look at the sis (or mga) driver on how > to > make use of this (keyword RENDER acceleration). > > I can't think of a useful application for gradient fills (yes, sis > supports that, too). > > Transparent bitblits are supported by XAA's normal bitblit functions, > > hence this could be of some use. > > Thomas > > __________________________________ Do you Yahoo!? Protect your identity with Yahoo! Mail AddressGuard http://antispam.yahoo.com/whatsnewfree _______________________________________________ Devel mailing list [EMAIL PROTECTED] http://XFree86.Org/mailman/listinfo/devel
