[Bug 22983] Battlefield Bad Company 2: game only shows black screen

[wine-bugs at winehq.org]

http://bugs.winehq.org/show_bug.cgi?id=22983

--- Comment #4 from Stefan Dösinger <stefandoesinger at gmx.at> 2010-10-11 06:17:39 CDT ---
Fyi, the cause for the black screens is an exception. The exception is caught
by the game, so it doesn't fully crash, but the rendering thread is dead.

The game tries to draw geometry without position data with the fixed function
pipeline. The geometry comes from a dynamic vertex buffer. With
map_buffer_range this buffer has a GL VBO, because of that the opengl vertex
array API is used. OpenGL sees that there's no position data, returns an error
and doesn't draw.

Without the VBO, the immediate mode drawing code(drawStridedSlow) is entered.
It assumes that position data is available, tries to dereference the NULL
pointer and crashes.

The correct fix is to write a test for the return value, check for fixed
function drawing without position data, return D3D_OK or D3DERR_INVALIDCALL and
don't attempt to draw.

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