[15/20] WineD3D: Clean up drawprim a bit

[Stefan Dösinger]

Am Samstag 13 Januar 2007 21:37 schrieb H. Verbeet:
> On 12/01/07, Christoph Bumiller <e0425955 at stud3.tuwien.ac.at> wrote:
> > Stefan Dösinger wrote:
> > > We will need software shaders for a correct implementation of
> > > IWineD3DDevice::ProcessVertices. It supports Vertex shaders, but I
> > > don't really think OpenGL feedback mode is what we want here.
> > >
> > > Maybe we should remove it for now, but keep the code somewhere(in the
> > > wiki maybe). If someone is extra-ambitious we can do something like
> > > Softwire/SwiftShader does. But I think ProcessVertices is a good
> > > oportunity to verify our vertex shader implementation.
> >
> > Sounds fun *g* ... I thought of generating Intel assembly code from the
> > vertex shader bytecode on the fly, just like GLSL and ARB shaders are
> > generated, using primarily SSE for doing the floating point
> > computations (in situations where it brings an advantage), and directly
> > referencing the memory at IWineD3DVertexShaderImpl->data,input,output
> > (load constants, input data, store temporary values, store output
> > data). Would something like that even be accepted in wine ?
> >
> > I'm already 'experimenting' a bit, but as I don't have much time these
> > days don't count on it to be finished within the next 3 months, or
> > ever, after all I might also get so desperate with it and stop working
> > on it altogether ... I've never written anything similar before.
> >
> > The main reason for this mail is to know whether someone else is
> > working on a solution for doing software vshaders already, and if so,
> > rather invest the time in my other studies (I'm running behind there
> > ...), before having two people work at the same thing.
>
> How about something like R2VB?
I think we can implement R2VB if we want it(it is an ATI hack) by just setting 
a VBO as a render target. The extensions imply that this is supposed to work, 
although the performance isn't guaranted to be optimal. I think the biggest 
issue with R2VB is Alexandre :-/
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