[Bug 98784] Talos Principle rendering flickering garbage on start instead of its logo and loading squares - bugzilla-daemon

From: bugzilla-daemon@freedesktop.org
To: dri-devel@lists.freedesktop.org
Subject: [Bug 98784] Talos Principle rendering flickering garbage on start instead of its logo and loading squares
Date: Thu, 26 Jan 2017 01:37:12 +0000	[thread overview]
Message-ID: <bug-98784-502-tANVAfXs7r@http.bugs.freedesktop.org/> (raw)
In-Reply-To: <bug-98784-502@http.bugs.freedesktop.org/>

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https://bugs.freedesktop.org/show_bug.cgi?id=98784

--- Comment #15 from Michel Dänzer <michel@daenzer.net> ---
Thanks for raising the issue with Croteam.

(In reply to Germano Massullo from comment #14)
> I've just double checked and we definately set GL_DRAW_FRAMEBUFFER to 0
> (default back buffer) before clear.

When I look at the trace from comment #10 in qapitrace, I see a bunch of
glBindFramebuffer(GL_DRAW_FRAMEBUFFER, ...) calls in frame 0, the last one
being

 glBindFramebuffer(GL_DRAW_FRAMEBUFFER, 31)

After that, there are no glBindFramebuffer calls for a long time.
GL_DRAW_FRAMEBUFFER isn't set to 0 before frame 777, after which the flickering
stops, and the window contents start looking as expected.

I've now also confirmed this with running glretrace in gdb and setting a
breakpoint at _mesa_BindFramebuffer.

I'd definitely like somebody else to confirm the above though, to make sure I'm
not missing anything.

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