[Bug 8194] Ddraw patch crashes Europa Universalis II and Victoria at start-up

[Wine Bugs]

http://bugs.winehq.org/show_bug.cgi?id=8194





------- Additional Comments From stefandoesinger at gmx.at  2007-08-06 15:10 -------
I think I've found the bug(at least EU2 starts again with a hack). EU2 makes 
some assumptions about the surface alignment, which is nowhere documented. In 
DirectDraw surface lines in memory have a size that is a multiple of 8(QWORD 
alignment), but wined3d uses multiples of 4, like Windows' d3d9
(DWORD-Alignment).

EU2 creates a 16 bit 129x1190 surface. With QWORD alignment this surface has a 
pitch(line length) of 2384 bytes, which results in a total size of 307.536 
bytes. With DWORD alignment the pitch is 2380 bytes, total size 307020 bytes. 
EU2 writes the full QWORD-Aligned size, thus crashes after 307200 bytes(300 
kb, at the end of the last page).

I'll make a patch for that


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