[Bug 15334] Radeon EXA + Sampling off the edge of REPEAT_NONE sources

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Thu Apr 3 23:20:29 PDT 2008


--- Comment #5 from Michel Dänzer <michel at tungstengraphics.com>  2008-04-03 23:20:28 PST ---
Another crazy idea: Modulate the alpha channel with an additional alpha-only
texture that samples 0.0 at the border and 1.0 otherwise. This might not even
require actual storage.

Anyway, I guess we can use this patch for now and worry about alternatives
later if it turns out to be important in practice. If nobody beats me to it,
I'll integrate it when I get around to it.

I do see some minor issues in the patch though: I think the comment should say
'alpha=0' rather than just 'alpha', and I'm not sure the driver should use
pixman macros directly.

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