[Mesa-dev] [PATCH 3/3] mesa: only emit _NEW_MULTISAMPLE when min sample shading changes

[Samuel Pitoiset]

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

Signed-off-by: Samuel Pitoiset <samuel.pitoiset at gmail.com>
---
 src/mesa/main/multisample.c | 9 ++++++---
 1 file changed, 6 insertions(+), 3 deletions(-)

diff --git a/src/mesa/main/multisample.c b/src/mesa/main/multisample.c
index 16fe2b7ced..07786130d5 100644
--- a/src/mesa/main/multisample.c
+++ b/src/mesa/main/multisample.c
@@ -140,10 +140,13 @@ _mesa_MinSampleShading(GLclampf value)
       return;
    }
 
-   FLUSH_VERTICES(ctx, 0);
+   value = CLAMP(value, 0.0f, 1.0f);
+
+   if (ctx->Multisample.MinSampleShadingValue == value)
+      return;
 
-   ctx->Multisample.MinSampleShadingValue = CLAMP(value, 0.0f, 1.0f);
-   ctx->NewState |= _NEW_MULTISAMPLE;
+   FLUSH_VERTICES(ctx, _NEW_MULTISAMPLE);
+   ctx->Multisample.MinSampleShadingValue = value;
 }
 
 /**
-- 
2.13.0