Module: Mesa Branch: master Commit: b625bcc601a16fab1962f9ed569700d3d08738b9 URL: http://cgit.freedesktop.org/mesa/mesa/commit/?id=b625bcc601a16fab1962f9ed569700d3d08738b9
Author: Kenneth Graunke <[email protected]> Date: Wed Apr 26 14:28:49 2017 -0700 i965: Use true AA line distance on G45/Ironlake. The original Broadwater and Crestline platforms computed antialiased line distances using "manhattan" distance, aka a + b = c. Eaglelake and Cantiga added "true" distance, which apparently does something like max(a, b) + min(a, b) / 4. Not exactly "true", but at least more accurate. The G45 documentation indicates that the old manhattan distance setting is "only for debug purposes" and should never be used. The Ironlake documentation no longer mentions AALINEDISTANCE_MANHATTAN, though it does still contain the narrative about the feature. At any rate, we should use the more accurate mode. Reviewed-by: Plamena Manolova <[email protected]> Reviewed-by: Francisco Jerez <[email protected]> --- src/mesa/drivers/dri/i965/brw_sf_state.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/brw_sf_state.c b/src/mesa/drivers/dri/i965/brw_sf_state.c index e919f5d14b..d50ceb1213 100644 --- a/src/mesa/drivers/dri/i965/brw_sf_state.c +++ b/src/mesa/drivers/dri/i965/brw_sf_state.c @@ -265,7 +265,7 @@ static void upload_sf_unit( struct brw_context *brw ) /* _NEW_PROGRAM | _NEW_POINT */ sf->sf7.use_point_size_state = !(ctx->VertexProgram.PointSizeEnabled || ctx->Point._Attenuated); - sf->sf7.aa_line_distance_mode = 0; + sf->sf7.aa_line_distance_mode = brw->is_g4x || brw->gen == 5; /* might be BRW_NEW_PRIMITIVE if we have to adjust pv for polygons: * _NEW_LIGHT _______________________________________________ mesa-commit mailing list [email protected] https://lists.freedesktop.org/mailman/listinfo/mesa-commit
