[Bug 109738] Child of Light shows only a black screen

[bugzilla-daemon at freedesktop.org]

https://bugs.freedesktop.org/show_bug.cgi?id=109738

Kenneth Graunke <kenneth at whitecape.org> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|NEW                         |ASSIGNED
           Assignee|intel-3d-bugs at lists.freedes |kenneth at whitecape.org
                   |ktop.org                    |

--- Comment #1 from Kenneth Graunke <kenneth at whitecape.org> ---
Hi there,

Thanks for the bug report!  You found a pretty glaring bug - I was telling the
state tracker that we couldn't render to RGBX format FBOs, even though we
totally can.  Wrote a simple fix, but that uncovered another bug in my RGBX
blend handling.  Figured that one out as well, but need another round of
testing.

This branch ought to fix it:
https://gitlab.freedesktop.org/kwg/mesa/commits/iris-childoflight

Assuming testing comes back green, I'll send it out for review and possibly
land the fixes tomorrow.

By the way, I noticed that the trace is hitting a whole ton of stalls, which
will probably lead to poor performance.  This is a known issue and I've got
fixes in the works for that, but unfortunately those are not on the tomorrow
timeframe. :)

--Ken

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