[Bug 99919] Wrong and unstable image rendering from GLSL fragment shaders

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Sat Feb 25 14:34:05 UTC 2017


--- Comment #7 from Roland Scheidegger <sroland at vmware.com> ---
I think there's a potential issue in the original shader itself.
The opU function has an out parameter HitData hd, which should probably be
inout. Otherwise depending on some conditions the value returned will be
undefined (as it gets initialized before in the calling function).
Not sure if these conditions are actually hittable and matter here - I've
looked at the tgsi code and indeed the tgsi code was different with this
change, but it made no difference to the checkerboard pattern being rendered
with llvmpipe.

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