[Bug 29184] Hogs of War: ground is missing somewhere

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=29184

Paul Gofman <gofmanp at gmail.com> changed:

           What    |Removed                     |Added
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                 CC|                            |gofmanp at gmail.com

--- Comment #25 from Paul Gofman <gofmanp at gmail.com> ---
Created attachment 65744
  --> https://bugs.winehq.org/attachment.cgi?id=65744
Proof of concept hack

I've tested the game. The problem is reproducible.

The game works fine if run in 16 bit colour depth display (with X session
started, e. g., like this from console: 'xinit /usr/bin/lxsession -- :9 -ac
-depth 16'; of course something else can be chosen instead of lxsession or :9).

It looks like there is a bug in the game which makes the display depth
influence unrelated things. It draws all the 3D objects using transformed
positions with _DrawPrimitive(). The contents of the vertex position data which
game prepares happen to depend on the display depth (while has nothing to do
with that in principle), more exactly, on the value returned by
gdi32.GetDeviceCaps(..., BITSPIXEL). Forcing it to 16 (as the attached hack
does) is enough to make the game happy on 32 bit display and fixes the
rendering.

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