Cycles: Communicate number of closures and nodes feature set to the device

This way device can actually make a decision of how it can optimize the kernel
in order to make it most efficient.

1 files changed, 24 insertions, 1 deletions

diff --git a/intern/cycles/device/device.h b/intern/cycles/device/device.h
index 98155900748..4d40518644e 100644
--- a/intern/cycles/device/device.h
+++ b/intern/cycles/device/device.h
@@ -74,14 +74,37 @@ public:
 	/* Use experimental feature set. */
 	bool experimental;
 
+	/* Maximum number of closures in shader trees. */
+	int max_closure;
+
+	/* Selective nodes compilation. */
+
+	/* Identifier of a node group up to which all the nodes needs to be
+	 * compiled in. Nodes from higher group indices will be ignores.
+	 */
+	int max_nodes_group;
+
+	/* Features bitfield indicating which features from the requested group
+	 * will be compiled in. Nodes which corresponds to features which are not
+	 * in this bitfield will be ignored even if they're in the requested group.
+	 */
+	int nodes_features;
+
 	DeviceRequestedFeatures()
 	{
+		/* TODO(sergey): Find more meaningful defaults. */
 		experimental = false;
+		max_closure = 0;
+		max_nodes_group = 0;
+		nodes_features = 0;
 	}
 
 	bool modified(const DeviceRequestedFeatures& requested_features)
 	{
-		return !(experimental == requested_features.experimental);
+		return !(experimental == requested_features.experimental &&
+		         max_closure == requested_features.max_closure &&
+		         max_nodes_group == requested_features.max_nodes_group &&
+		         nodes_features == requested_features.nodes_features);
 	}
 };