Re: GSoC-2011: Implement Missing Mesh Functions in Wine’s D3DX9

[Stefan Dösinger]

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Am 26.05.2011 um 16:27 schrieb Michael Mc Donnell:
> Yeah I'd prefer it too to be 100% compatible. However, I think it is
> highly unlikely that any programs depend on an exception being thrown
> by EndScene in a drawing method.
What EndScene method is this? The device's methods? I'd be surprised if this method crashed.

> But you never know, some people do
> crazy things :-) I think the current implementation is good enough as
> long as there is no evidence of programs depending on that behavior.
> 
> The problem is that UpdateSemantics in the d3dx9 library depends on
> d3d9 and the error code is generated by vertexdeclaration_init in
> d3d9.
Do the d3d9 vertexdeclaration tests pass on this Windows machine?

> I thought of managing an array of D3DVERTEXELEMENT9 in ID3DXMeshImpl
> instead of a IDirect3DVertexDeclaration9, and then have
> ID3DXMeshImpl_DrawSubset call IDirect3DDevice9_CreateVertexDeclaration
> just before IDirect3DDevice9_SetVertexDeclaration.
I suspect that this is what native does. This also fits the API design because UpdateSemantics accepts a D3DVERTEXELEMENT9 array and GetDeclaration returns a D3DVERTEXELEMENT9 array. Why did MS name those functions UpdateSemantics and GetDeclaration???

I don't think you'd have extra d3d9 calls by delaying the vdecl creation. Of course you have to keep the vdecl until the next UpdateSemantic call and not recreate it every time you draw.


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