Cycles: Solve speed regression of classroom scene after principled commit

This way we can skip it from compiling into OpenCL kernels by making
this shader compile-time feature.

1 files changed, 9 insertions, 1 deletions

diff --git a/intern/cycles/device/device.h b/intern/cycles/device/device.h
index ac06e561795..6051dd8b3eb 100644
--- a/intern/cycles/device/device.h
+++ b/intern/cycles/device/device.h
@@ -124,6 +124,9 @@ public:
 	/* Use various shadow tricks, such as shadow catcher. */
 	bool use_shadow_tricks;
 
+	/* Per-uber shader usage flags. */
+	bool use_principled;
+
 	DeviceRequestedFeatures()
 	{
 		/* TODO(sergey): Find more meaningful defaults. */
@@ -141,6 +144,7 @@ public:
 		use_patch_evaluation = false;
 		use_transparent = false;
 		use_shadow_tricks = false;
+		use_principled = false;
 	}
 
 	bool modified(const DeviceRequestedFeatures& requested_features)
@@ -158,7 +162,8 @@ public:
 		         use_integrator_branched == requested_features.use_integrator_branched &&
 		         use_patch_evaluation == requested_features.use_patch_evaluation &&
 		         use_transparent == requested_features.use_transparent &&
-		         use_shadow_tricks == requested_features.use_shadow_tricks);
+		         use_shadow_tricks == requested_features.use_shadow_tricks &&
+		         use_principled == requested_features.use_principled);
 	}
 
 	/* Convert the requested features structure to a build options,
@@ -205,6 +210,9 @@ public:
 		if(!use_shadow_tricks) {
 			build_options += " -D__NO_SHADOW_TRICKS__";
 		}
+		if(!use_principled) {
+			build_options += " -D__NO_PRINCIPLED__";
+		}
 		return build_options;
 	}
 };