Marek Olšák schrieb: > Hi, > > GL_ARB_provoking_vertex states that quads are not required to abide > the provoking vertex convention, and the actual hardware and/or driver > behavior can be queried with > GL_QUADS_FOLLOW_PROVOKING_VERTEX_CONVENTION. > > I'd like to add a new PIPE_CAP_* to query for this capability in > Gallium, as it appears R3xx-R5xx hardware doesn't support the first > vertex convention for quads and I'd like the driver to behave > correctly. Fortunately, other primitive types are supported. > > I decided to use the name "quads follow flatshade_first convention" > instead of "provoking vertex convention" because the actual state > variable in pipe_rasterizer_state is called flatshade_first. > > The attached patch: > - adds PIPE_CAP_QUADS_FOLLOW_FLATSHADE_FIRST_CONVENTION > - adds the query in the Mesa state tracker > - and updates softpipe and llvmpipe to return 1 when this cap is > queried, and r300g to explicitly return 0 > You can add a "return 1" for nv50, too, in case you do push this patch. I just tested and for quads I can also make them use either the first or the last vertex's colour, i.e. flatshade convention is respected.
Thanks, Christoph. > Please review/push. > > Cheers. > > Marek > > > ------------------------------------------------------------------------ > > ------------------------------------------------------------------------------ > This SF.Net email is sponsored by the Verizon Developer Community > Take advantage of Verizon's best-in-class app development support > A streamlined, 14 day to market process makes app distribution fast and easy > Join now and get one step closer to millions of Verizon customers > http://p.sf.net/sfu/verizon-dev2dev > > > ------------------------------------------------------------------------ > > _______________________________________________ > Mesa3d-dev mailing list > Mesa3d-dev@lists.sourceforge.net > https://lists.sourceforge.net/lists/listinfo/mesa3d-dev ------------------------------------------------------------------------------ This SF.Net email is sponsored by the Verizon Developer Community Take advantage of Verizon's best-in-class app development support A streamlined, 14 day to market process makes app distribution fast and easy Join now and get one step closer to millions of Verizon customers http://p.sf.net/sfu/verizon-dev2dev _______________________________________________ Mesa3d-dev mailing list Mesa3d-dev@lists.sourceforge.net https://lists.sourceforge.net/lists/listinfo/mesa3d-dev
