----- Original Message ----- > ----- Original Message ----- > > I have managed to make the triangle-rasterization test pass. Let's > > forget about what the origin is, because it's not really important. > > What is actually important is what happens when an edge falls exactly > > on a sample point. Radeons have a state which determines what happens > > for the left, right, top, and bottom edge, and it does not affect the > > coordinate system, which is always top-left. So the issue is fixable > > for radeon drivers as long as the origin is always top-left (i.e. no > > changes are made to the viewport and scissor states). > > > > Registers: > > r300 - SC_EDGERULE > > r600 - PA_SC_EDGERULE > > > > Marek > > > > That's great. > > Spite the name, this was precisely the intent of "lower_left_origin" -- > whether top edges (horizontal edges exactly along the sample point) are > inclusive or exclusive. I'm open for better name suggestions.
Actually, it's not just horizontal edges -- the rule also applies to any edge < 45 degrees. Jose _______________________________________________ mesa-dev mailing list mesa-dev@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/mesa-dev
