freedreno/a4xx: alpha-test

Signed-off-by: Rob Clark <robclark@freedesktop.org>
2014-12-20 12:01:02 -05:00
parent 097d760aac
commit 10d81a03b3
1 changed files with 2 additions and 0 deletions
@@ -92,10 +92,12 @@ fd4_zsa_state_create(struct pipe_context *pctx,
 	}

 	if (cso->alpha.enabled) {
+		uint32_t ref = cso->alpha.ref_value * 255.0;
 		so->gras_alpha_control =
 			A4XX_GRAS_ALPHA_CONTROL_ALPHA_TEST_ENABLE;
 		so->rb_alpha_control =
 			A4XX_RB_ALPHA_CONTROL_ALPHA_TEST |
+			A4XX_RB_ALPHA_CONTROL_ALPHA_REF(ref) |
 			A4XX_RB_ALPHA_CONTROL_ALPHA_TEST_FUNC(cso->alpha.func);
 		so->rb_depth_control |=
 			A4XX_RB_DEPTH_CONTROL_EARLY_Z_DISABLE;