[Bug 46357] Cossacks 2 Battle for Europe show crashed graphics

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=46357

Béla Gyebrószki <gyebro69 at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |matteo.mystral at gmail.com

--- Comment #6 from Béla Gyebrószki <gyebro69 at gmail.com> ---
I can reproduce this bug with the GOG.com version (not reproducible in the
DotEmu version which I also have).

I *think* the patch causing the rendering issue is

commit 75b7ff60562880b6e7b646a8fa84486670162d00
Author: Matteo Bruni <mbruni at codeweavers.com>
Date:   Mon Dec 17 22:59:23 2018 +0330

    d3d8: Support drawing from D3DPOOL_SYSTEMMEM vertex buffers.

It's hard to prove it though. The game was broken between 3.18 and 4.0-rc3 (bug
#45987 , later marked as a dupe of bug #46357). This made the game refuse to
even launch.

Besides, I could not revert that commit cleanly on 4.0-rc5 to see if the
problem ceases to exist.

I did however applied that single patch on the last working version (Wine 3.17,
that is) and the screen corruption is there (pure 3.17. doesn't have the
problem).

Wine 4.0-rc5
OpenGL vendor string: NVIDIA Corporation
OpenGL renderer string: GeForce GT 730/PCIe/SSE2
OpenGL core profile version string: 4.6.0 NVIDIA 415.22.01

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