[Bug 109759] [BISECTED][REGRESSION][IVB, HSW] Font rendering problem in OpenGL

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Wed Feb 27 14:55:11 UTC 2019


--- Comment #12 from Ian Romanick <idr at freedesktop.org> ---
(In reply to Lionel Landwerlin from comment #10)
> (In reply to Ian Romanick from comment #8)
> > An earlier patch in that series 440c0513406 "i965/vec4/dce: Don't narrow the
> > write mask if the flags are used" fixed some things related to swizzles and
> > compares.  It's possible that didn't fix all the problems.  It's also
> > possible that there are latent problems in cmod propagation.  I would first
> > try disabling cmod propagation.  If that fixes the problem, comparing the
> > before & after shader assembly should make the problem obvious.  The fix may
> > not be so obvious. :)
> > 
> > As a side note... someone should capture the shaders from this app and put
> > them in the public shader-db.
> Yeah, but shader-db doesn't tell us whether the generated code is correct :(

That's why it was a side note. :D  As soon as we understand the underlying
problem, my comment will be, "Someone should add a pitlit test that reproduces
this issue." ;)

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