On Friday 31 March 2006 19:49, Keith Packard wrote: > On Fri, 2006-03-31 at 09:33 -0700, Brian Paul wrote: > > > AFAIK, nobody's hardware does that. > > > > When that kind of antialiasing is done for text, I think it's the job > > of the font rendering code to do so. > > It's not the construction of the glyphs that's at issue here, I don't > think. The glyphs are drawn to the screen using a separate alpha channel > for each component in the pixel, an operation which isn't directly > supported by the GL API at present. I don't know what we'd need in the > hardware for this to be efficient though; I believe it is possible to do > it today using three passes for each string, which seems horrendous > until you realize how slow it will be to do the same thing with the CPU.
Surely you could just use an RGB texture instead of an ALPHA texture? Then it's just a matter of setting the appropriate texture environments and blending modes. cu, Nicolai
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