[Bug 41930] Civilization III Complete shows black terrain (Wine compiled with OSMesa support)

[WineHQ Bugzilla]

https://bugs.winehq.org/show_bug.cgi?id=41930

--- Comment #44 from Bryan Varner <bryan at varnernet.com> ---
This is where I get to confess I was wrong about the SRCCOPY being the wrong
thing.

I hacked up a quick and dirty StretchBlt that did the introspection on the src,
and swapped the ROP to the SRCPAINT....

The _initial_ paint when the settler is active on the map (where it paints the
translucent diamond pattern into the offscreen mesa context then blts back to
the main screen) worked. However, the map layer never got updated properly
again. Every draw after was black.

So, the SRCPAINT vs SRCCOPY and premultiplied alpha idea I've been harboring
for a year or so is _not_ the issue. I've been wrong about that for a very long
time.


However, in reviewing the ticket, and looking at the results of what was
happening when I did the SRCPAINT hack, it has me wondering if I wasn't onto
something at the tail end of Comment 30.

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