On Thu, Sep 09, 2004 at 05:03:27PM +0200, Philipp Klaus Krause wrote:
> Brian Paul schrieb:
> >Pasi Kärkkäinen wrote:
> >
> >>Hi all!
> >>
> >>>From the www.opengl.org:
> >>
> >>
> >>OpenGL 2.0 specification available for download
> >>
> >>http://www.opengl.org/documentation/opengl_current_version.html
> >>http://www.opengl.org/documentation/specs/version2.0/glspec20.pdf
> >>
> >>Any plans for 2.0 support in Mesa? I think the biggest "todo" is the
> >>sw-emulation of glsl?
> >
> >
> >Yeah, implementing the shading language will be a huge project. It
> >would be nice if a group of volunteers would work together to implement it.
> >
> >I'll probably start working on some of the infrastructure for 2.0
> >support in the near future. But the GLSL parser and code generator will
> >be the bulk of the 2.0 work by far.
> >
> >-Brian
> >
>
> Some modifications to Mesa are necessary:
> -Change glColor3 behaviour,
> -Seperate legacy and generic vertex attributes.
> GL_NV_vertex_program, GL_NV_vertex_program1_1 and GL_NV_vertex_program2
> needs attribute aliasing. GL_ARB_vertex_program, GL_NV_vertex_program3
> allow it. GL_ARB_vertex_shader sas that even for GL_ARB_vertex_program
> (assuming both extensions present) there may be no attribute aliasing.
> -I dont' know about GL_ARB_texture_non_power_of_two and
> GL_ARB_draw_buffers. Are they supported already?
> -The rest should be there.
>
> I planned to do some work towards shader support, but wanted to wait for
> The 2.0 spec to be released to see what would change. I probably won't
> find much time before mid-october or so. This is what I had in mind:
>
> Frontends for GL_ARB_vertex_program and GL_ARB_vertex_shader,
> GL_ARB_fragment_program and GL_ARB_fragment_shader that create some
> intermediate representation.
> Then, at least four backends: One for SSE to get fast software
> rendering on newer x86, one that interpretes for the architectures where
> there is no compiling backend, one for the new intel chips and their
> fragment program support and finally, one for the Wildcat VP
> (I don't have docs for it though and doubt that I will ever get any,
> I haven't asked Intel about i915 yet).
>
> So get get something running I would first craete the
> GL_ARB_vertex_program frontend. Then the interpreting backend. If it's
> at least as fast as the solution we have now, we can already put it in
> Mesa. Next will be GL_ARB_vertex_shader frontend and SSE backend.
>
Hmm.. is it possible to use the frontend compiler which is available from
3dlabs website? Or does it help anything..
-- Pasi Kärkkäinen
^
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