This avoids recompiles for shaders that don't use explicit derivatives
when ctx->Hint.FragmentShaderDerivative == GL_NICEST.
---
src/mesa/drivers/dri/i965/brw_wm.c | 1 +
1 file changed, 1 insertion(+)
diff --git a/src/mesa/drivers/dri/i965/brw_wm.c
b/src/mesa/drivers/dri/i965/brw_wm.c
index ad1c8aed79e..a1e39b55fcb 100644
--- a/src/mesa/drivers/dri/i965/brw_wm.c
+++ b/src/mesa/drivers/dri/i965/brw_wm.c
@@ -521,6 +521,7 @@ brw_wm_populate_key(struct brw_context *brw, struct
brw_wm_prog_key *key)
/* _NEW_HINT */
key->high_quality_derivatives =
+ prog->info.uses_fddx_fddy &&
ctx->Hint.FragmentShaderDerivative == GL_NICEST;
if (devinfo->gen < 6)
--
2.14.2
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