From fed72ff6cb85fa6044335cfc41d8492458f53750 Mon Sep 17 00:00:00 2001 From: Charmaine Lee Date: Wed, 15 Mar 2017 15:18:14 -0700 Subject: [PATCH] svga: do not emulate wide points in GS when doing transform feedback Emulating wide points in geometry shader when doing transform feedback is problematic. This patch disables the emulation. Tested with piglit test ext_transform_feedback-points. Also tested with MTT glretrace, mesa demos pointblast and spriteblast. Reviewed-by: Brian Paul --- src/gallium/drivers/svga/svga_state_tgsi_transform.c | 8 +++++--- 1 file changed, 5 insertions(+), 3 deletions(-) diff --git a/src/gallium/drivers/svga/svga_state_tgsi_transform.c b/src/gallium/drivers/svga/svga_state_tgsi_transform.c index 9e643ff..b567aab 100644 --- a/src/gallium/drivers/svga/svga_state_tgsi_transform.c +++ b/src/gallium/drivers/svga/svga_state_tgsi_transform.c @@ -249,9 +249,11 @@ update_tgsi_transform(struct svga_context *svga, unsigned dirty) if (svga->curr.reduced_prim == PIPE_PRIM_POINTS) { /* If the current prim type is POINTS and the current geometry shader * emits wide points, transform the shader to emulate wide points using - * quads. + * quads. NOTE: we don't do emulation of wide points in GS when + * transform feedback is enabled. */ - if (gs != NULL && (gs->base.info.writes_psize || gs->wide_point)) { + if (gs != NULL && !gs->base.stream_output && + (gs->base.info.writes_psize || gs->wide_point)) { orig_gs = gs->base.parent ? gs->base.parent : &gs->base; new_gs = emulate_point_sprite(svga, orig_gs, orig_gs->tokens); } @@ -260,7 +262,7 @@ update_tgsi_transform(struct svga_context *svga, unsigned dirty) * shader emits wide point then create a new geometry shader to emulate * wide point. */ - else if (gs == NULL && + else if (gs == NULL && !vs->base.stream_output && (svga->curr.rast->pointsize > 1.0 || vs->base.info.writes_psize)) { new_gs = add_point_sprite_shader(svga); -- 2.7.4