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

[bugzilla-daemon at freedesktop.org]

http://bugs.freedesktop.org/show_bug.cgi?id=15334





--- Comment #3 from Michel Dänzer <michel at tungstengraphics.com>  2008-04-03 09:04:10 PST ---
(In reply to comment #2)
Ignore the scissor for now - it would just be to prevent rendering outside of
the composite operation's destination rectangle.

The idea is to transform the destination vertices such that their texture
coordinates coincide with the corners of the texture. Or does the spec require
that all pixels of the destination rectangle do get rasterized?

Either way, I didn't think of non-linear filtering...

Another possibility might be to handle this in the shader?

It's a pity the R300 3D engine seems to require the texture to have alpha for
your solution to work... AFAICT this might not be the case on R200 at least, as
the border colour registers always take a 32 bit ARGB value there.


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