Mesa (master): mesa: only emit _NEW_MULTISAMPLE when sample mask changes

[Samuel Pitoiset]

Module: Mesa
Branch: master
Commit: af9e537be3df89fef046c827fc83acbe2199107a
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=af9e537be3df89fef046c827fc83acbe2199107a

Author: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Date:   Fri Jun  2 17:52:48 2017 +0200

mesa: only emit _NEW_MULTISAMPLE when sample mask changes

We usually check that given parameters are different before
updating the state.

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
Reviewed-by: Marek Olšák <marek.olsak at amd.com>

---

 src/mesa/main/multisample.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index f0e7a61180..16fe2b7ced 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -119,6 +119,9 @@ _mesa_SampleMaski(GLuint index, GLbitfield mask)
       return;
    }
 
+   if (ctx->Multisample.SampleMaskValue == mask)
+      return;
+
    FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
    ctx->Multisample.SampleMaskValue = mask;
 }