On 24.02.2010 12:48, Christoph Bumiller wrote: > This wasn't a problem before because textures and samplers were > linked 1:1, but in view of the gallium-gpu4-texture-opcodes branch, > this coordinate normalization bit becomes a problem. > > NV50 hardware has that bit in the RESOURCE binding, and not the > SAMPLER binding, and you can imagine that this will lead to us having > to jump through a few annoying looking hoops to accomodate. > > As far as I can see, neither D3D10 nor D3D11 nor OpenGL nor CUDA have > sampler states that are decoupled from the texture, and which contain > a normalized coordinates bit, so it's worth considering not having it there > in gallium either. > > For OpenGL, unnormalized coordinates are only used for RECT textures, > and in this case it makes sense to make it a property of the texture.
I agree this is not sampler state, but I don't quite agree this should be texture state. This changes how texture coordinates get interpreted in the interpolator - in that sense it is similar to the cylindrical texture coord wrap which we moved away from sampler state recently. This one got moved to shader declaration. I wonder if the normalization bit should be treated the same. Though OTOH you're quite right that in OpenGL this really is texture property (it is a different texture target after all), and afaik d3d doesn't support non-normalized coords (?). Hmm... Roland > > And, finally, I've seen you reverted the changes for independent image > and sampler index in the texture opcodes. What's up with that ? > Is the code not nice enough, or has the idea been discarded and by problem > disappears ? > > Best regards, > Christoph > > > ------------------------------------------------------------------------------ > Download Intel® Parallel Studio Eval > Try the new software tools for yourself. Speed compiling, find bugs > proactively, and fine-tune applications for parallel performance. > See why Intel Parallel Studio got high marks during beta. > http://p.sf.net/sfu/intel-sw-dev > _______________________________________________ > Mesa3d-dev mailing list > Mesa3d-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mesa3d-dev ------------------------------------------------------------------------------ Download Intel® Parallel Studio Eval Try the new software tools for yourself. Speed compiling, find bugs proactively, and fine-tune applications for parallel performance. See why Intel Parallel Studio got high marks during beta. http://p.sf.net/sfu/intel-sw-dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
