From eca57f85ee1f47b32daa641a19d8d386c58eb1de Mon Sep 17 00:00:00 2001 From: Nicolai Hähnle Date: Thu, 15 Dec 2016 12:19:07 +0100 Subject: radeonsi: fix gl_ClipDistance and gl_ClipVertex for points MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The clipper hardware doesn't consider points as primitives that can be clipped. Simply setting the corresponding cull bits works, and should not have an adverse effect on other primitive types according to the hardware team. Reviewed-by: Marek Olšák Reviewed-by: Edward O'Callaghan --- src/gallium/drivers/radeonsi/si_state.c | 12 ++++++++++-- 1 file changed, 10 insertions(+), 2 deletions(-) diff --git a/src/gallium/drivers/radeonsi/si_state.c b/src/gallium/drivers/radeonsi/si_state.c index afcd3ad26bc..11f9fb8449f 100644 --- a/src/gallium/drivers/radeonsi/si_state.c +++ b/src/gallium/drivers/radeonsi/si_state.c @@ -678,6 +678,15 @@ static void si_emit_clip_regs(struct si_context *sctx, struct r600_atom *atom) } total_mask = clipdist_mask | culldist_mask; + /* Clip distances on points have no effect, so need to be implemented + * as cull distances. This applies for the clipvertex case as well. + * + * Setting this for primitives other than points should have no adverse + * effects. + */ + clipdist_mask &= rs->clip_plane_enable; + culldist_mask |= clipdist_mask; + misc_vec_ena = info->writes_psize || info->writes_edgeflag || info->writes_layer || info->writes_viewport_index; @@ -690,8 +699,7 @@ static void si_emit_clip_regs(struct si_context *sctx, struct r600_atom *atom) S_02881C_VS_OUT_CCDIST1_VEC_ENA((total_mask & 0xF0) != 0) | S_02881C_VS_OUT_MISC_VEC_ENA(misc_vec_ena) | S_02881C_VS_OUT_MISC_SIDE_BUS_ENA(misc_vec_ena) | - (rs->clip_plane_enable & - clipdist_mask) | (culldist_mask << 8)); + clipdist_mask | (culldist_mask << 8)); radeon_set_context_reg(cs, R_028810_PA_CL_CLIP_CNTL, rs->pa_cl_clip_cntl | ucp_mask | -- cgit v1.2.3