[Bug 20554] Populous 3 fails to start

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=20554


Roderick Colenbrander <thunderbird2k at gmail.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
          Component|winex11.drv                 |directx-ddraw




--- Comment #19 from Roderick Colenbrander <thunderbird2k at gmail.com>  2009-11-08 08:47:44 ---
At WineConf I looked at this bug with Henri and in the end Alexandre joined us
as well. As I mentioned before we use segmentation faults for syncing the
memory of DIBSection with the X11 copy. Normally this works well. After
disassembling the app it appeared that for some reason Populous is messing with
the stack pointer and due to this we lose the stack and crash. For some reason
we got away with this before and now it broke. Alexandre said that the only
real solution to the issue would be a DIB engine in which we don't have to use
this evil memory tricks.

We could copy the DIB data over to a new buffer (in ddraw) and sync that buffer
later on but memcpy operations are very expensive and it would really kill
performance of other games. The issue we are seeing in Heroes 3 might be
related but I'm not sure.

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