[Bug 31260] Tomb Raider 4 Broken Lighting

[wine-bugs at winehq.org]

https://bugs.winehq.org/show_bug.cgi?id=31260

--- Comment #34 from Urbez <urbez_santana at enginyeriainformatica.cat> ---
I have found the problem of light:
In ddraw/vertexbuffer.c:
d3d_vertex_buffer7_ProcessVertices

Tomb raider 4, calls this with the OR of this flags:
D3DVOP_TRANSFORM | D3DVOP_LIGHT

The last, D3DVOP_LIGHT is not implemented in WineD3D.

Microsoft says that this flag is normally implemented in GPU not in the CPU
host, and the vertex must have normals (this is the case in TR4) if the vertex
not include normals the multiply is by 0.

Next step, i try to implement using the normals and the light data the correct
specular and diffuse colors.

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