On Fri, 10 Jan 2014 03:57:45 +0100 srol...@vmware.com wrote: > From: Roland Scheidegger <srol...@vmware.com> > > OpenGL does whole-point clipping, that is a large point is either fully > clipped or fully unclipped (the latter means it may extend beyond the > viewport as long as the center is inside the viewport). d3d9 (d3d10 has > no large points) however requires points to be clipped after they are > expanded to a rectangle. (Note some IHVs are known to ignore GL rules at > least with some hw/drivers.) > > Hence add a rasterizer bit indicating which way points should be clipped > (some drivers probably will always ignore this), and add the draw interaction > this requires. Drivers wanting to support this and using draw must support > large points on their own as draw doesn't implement vp clipping on the > expanded points (it potentially could but the complexity doesn't seem > warranted), and the driver needs to do viewport scissoring on such points.
Is there any possibility of this being exposed to user-space? With that hat on, it would have been useful to me several times in the past. Perhaps whoever was Mesa's ARB contact could propose an extension? I know nothing about how that happens, just would like this functionality. - Lauri _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
