mesa: Add a function to query whether a meta-op is in progress.

This is needed by i965 to ensure that transform feedback counters are
not incremented during meta-ops.

Reviewed-by: Kenneth Graunke <[email protected]>

1 files changed, 10 insertions, 0 deletions

diff --git a/src/mesa/drivers/common/meta.c b/src/mesa/drivers/common/meta.c
index 1683c85e9b7..c5c59ebeec9 100644
--- a/src/mesa/drivers/common/meta.c
+++ b/src/mesa/drivers/common/meta.c
@@ -985,6 +985,16 @@ _mesa_meta_end(struct gl_context *ctx)
 
 
 /**
+ * Determine whether Mesa is currently in a meta state.
+ */
+GLboolean
+_mesa_meta_in_progress(struct gl_context *ctx)
+{
+   return ctx->Meta->SaveStackDepth != 0;
+}
+
+
+/**
  * Convert Z from a normalized value in the range [0, 1] to an object-space
  * Z coordinate in [-1, +1] so that drawing at the new Z position with the
  * default/identity ortho projection results in the original Z value.