[Bug 35675] Bad textures in World of Tanks

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=35675

--- Comment #14 from Alexander <angavrilov at gmail.com> ---
Created attachment 49597
  --> https://bugs.winehq.org/attachment.cgi?id=49597
log filtered for only surface_upload_data

Furthermore, if you filter the log specifically for the calls to
surface_upload_data and look at what happens when switching tanks, you can see
sequences that look very much like texture uploads at different mipmap levels.
Looking closer, it is evident that subsequent uploads of the same dimensions
often reuse the source memory buffer address; and sometimes there are two
uploads to the same surface.

If this is evidence of temporary memory buffers and possibly surfaces being
reused to load multiple distinct textures in sequence, any unexpected
asynchronous behavior of the actual upload, whether introduced by Wine code or
the GL driver, may cause the wrong pixel data to be uploaded to a texture,
leading to the exact behavior seen in this bug. The explicit pipeline flush
forced by StrictDrawOrdering would suppress this race condition and the bug, as
supported by tests.

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