[Bug 45978] Deadlight (2011) Steam - Graphical glitches

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=45978

Paul Gofman <gofmanp at gmail.com> changed:

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--- Comment #15 from Paul Gofman <gofmanp at gmail.com> ---
Created attachment 65444
  --> https://bugs.winehq.org/attachment.cgi?id=65444
Workaround

I've tested the game and could reproduce the issue with flickering triangles
across the screen. I am attaching the patch which works around the issue for
me. I tested on Nvidia, as well as the other reports here. It would be
interesting to know how all that behaves on AMD.

The game is persistently sampling a texture which is attached as a render
target at the same time. This is naughty. The patch issues a GL memory barrier
before drawing for such a case which helps me on Nvidia. Yet it is not a good
solution as it is still an undefined behaviour in OpenGL according to the spec.

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