[Mesa-dev] [Bug 71199] [llvmpipe] piglit gl-1.4-polygon-offset regression

bugzilla-daemon at freedesktop.org bugzilla-daemon at freedesktop.org
Tue Jun 16 07:09:48 PDT 2015


--- Comment #10 from José Fonseca <jfonseca at vmware.com> ---
On me Mesa DRI Intel(R) Haswell Mobile I actually get the reverse problem:

$ ./bin/gl-1.4-polygon-offset -auto
    Actual MRD is too large (may waste depth-buffer range)

    Ideal  MRD at near plane is 5.960283e-08 (nominally 1 bit)
    Actual MRD at near plane is 1.192093e-07 (nominally 2 bits)
    Ideal  MRD at infinity is 4.353401e-08 (nominally 1 bit)
    Actual MRD at infinity is 1.192093e-07 (nominally 2 bits)

PIGLIT: {"result": "fail" }

So the test itself doesn't seem to be limited to 1 bit as I considered.

Still no idea on how to fix it.  I'm reluctant just to bump MRD on llvmpipe, as
I'm afraid it will cause problems with different state trackers.

It's not a huge deal neither.

In short, I'm afraid there's little chance for a fix any time soon..

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