[Bug 35993] Graphical Glitches in Agarest Generations of War

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=35993

--- Comment #15 from Matteo Bruni <matteo.mystral at gmail.com> ---
(In reply to Aexander from comment #14)
> Missing elements (buttons, etc.) happen on
> d3d9_device_DrawIndexedPrimitiveUP calls with a non-zero min_vertex_idx.
> Attached hack blindly applied surprisingly seems to work.

Nice catch! Actually that might be exactly how we want to fix this. The
alternative is to still only copy vertex_count vertices (but starting from
min_vertex_idx) and adjust the call to wined3d_device_set_base_vertex_index()
instead. That has the problem that the adjusted base vertex becomes negative
when min_vertex_idx * vertex_stride > vb_pos which seems "meh."

Notice also that there is identical code in d3d8 which needs the same fix.

Do you want to follow through on it? :)

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