From 5bb05c6e6d596d66c177e42a36128d2ca2e300aa Mon Sep 17 00:00:00 2001 From: Eric Anholt Date: Wed, 13 Feb 2013 21:21:45 -0800 Subject: [PATCH] i965/gen7: Set up all samplers even if samplers are sparsely used. In GLSL, sampler indices are allocated contiguously from 0. But in the case of ARB_fragment_program (and possibly fixed function), an app that uses texture 0 and 2 will use sampler indices 0 and 2, so we were only allocating space for samplers 0 and 1 and setting up sampler 0. We would read garbage for sampler 2, resulting in flickering textures and an angry simulator. Fixes bad rendering in 0 A.D. and ETQW. This was fixed for pre-gen7 by 28f4be9eb91b12a2c6b1db6660cca71a98c486ec Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=25201 Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=58680 Reviewed-by: Kenneth Graunke NOTE: This is a candidate for stable branches. --- src/mesa/drivers/dri/i965/gen7_sampler_state.c | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/src/mesa/drivers/dri/i965/gen7_sampler_state.c b/src/mesa/drivers/dri/i965/gen7_sampler_state.c index 6f0a757380b..1fb947f80c8 100644 --- a/src/mesa/drivers/dri/i965/gen7_sampler_state.c +++ b/src/mesa/drivers/dri/i965/gen7_sampler_state.c @@ -196,7 +196,7 @@ gen7_upload_samplers(struct brw_context *brw) GLbitfield SamplersUsed = vs->SamplersUsed | fs->SamplersUsed; - brw->sampler.count = _mesa_bitcount(SamplersUsed); + brw->sampler.count = _mesa_fls(SamplersUsed); if (brw->sampler.count == 0) return; -- 2.30.2