Am 18.09.2014 00:28, schrieb Roland Scheidegger: > ARB_fragment_layer_viewport is enabled unconditionally if geometry > shaders / multiple viewports are also enabled. This seems reasonable, > though I noticed at least it won't work for llvmpipe - entirely due to > the requirement of the viewport/layer value being zero if it wasn't > output by the gs (or if no gs is present). > I couldn't actually figure out if that would be required for d3d10 > (which has this functionality as well) too, though tests don't seem to > require it (or we otherwise get lucky). > I'm wondering if other drivers have a problem with that as well? I > thought it would be trivial to fix but not so actually for llvmpipe. > (Essentially would need to note if fs reads layer/vp_index when scanning > the shader, then inject some appropriate zero output in draw somewhere, > probably draw_prepare_shader_outputs(). At this point the extension > doesn't seem worth it anymore at least if d3d10 would not require that > behavior neither since it isn't in any GL core version.) > But I guess if it's just draw having a problem with that it's not worth > a cap bit neither... > > Roland
Hmm actually it's in glsl 4.30 so I guess it's worth fixing... Roland _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
