[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 #11 from Owen Taylor <otaylor at redhat.com>  2008-04-13 08:20:29 PST ---
On the R300_EASY_TX_FORMAT(ZERO, ZERO, ZERO, ONE, X8) idea:

Isn't the basic problem we are trying to solve here that a texture format 
of R300_EASY_TX_FORMAT(X, Y, Z, ONE, W8Z8Y8X8) doesn't allow us to have 
alpha in the border color?

By analogy I don't think we are going to have any more luck 
getting alpha in a the border color for a texture format of
R300_EASY_TX_FORMAT(ZERO, ZERO, ZERO, ONE, X8).

(The docs describe the swizzling fields of TX_FORMAT as "Specifies 
swizzling for each channel _at the input of the pixel shader_",
so that also implies that it happens after texture sampling/filtering.)


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