Cycles: Reduce verbosity of logging

Mainly makes logging less verbose when doing progressive sampling in viewport.

Such kind of verbosity is not really possible to be filtered out with `grep`
so let's reshuffle few lines of code.

1 files changed, 14 insertions, 6 deletions

diff --git a/intern/cycles/render/scene.cpp b/intern/cycles/render/scene.cpp
index 29163c53109..b0052c30af4 100644
--- a/intern/cycles/render/scene.cpp
+++ b/intern/cycles/render/scene.cpp
@@ -135,7 +135,9 @@ void Scene::device_update(Device *device_, Progress& progress)
 {
 	if(!device)
 		device = device_;
-	
+
+	bool print_stats = need_data_update();
+
 	/* The order of updates is important, because there's dependencies between
 	 * the different managers, using data computed by previous managers.
 	 *
@@ -239,9 +241,11 @@ void Scene::device_update(Device *device_, Progress& progress)
 		device->const_copy_to("__data", &dscene.data, sizeof(dscene.data));
 	}
 
-	VLOG(1) << "System memory statistics after full device sync:\n"
-	        << "  Usage: " << util_guarded_get_mem_used() << "\n"
-	        << "  Peak: " << util_guarded_get_mem_peak();
+	if(print_stats) {
+		VLOG(1) << "System memory statistics after full device sync:\n"
+		        << "  Usage: " << util_guarded_get_mem_used() << "\n"
+		        << "  Peak: " << util_guarded_get_mem_peak();
+	}
 }
 
 Scene::MotionType Scene::need_motion(bool advanced_shading)
@@ -278,11 +282,10 @@ bool Scene::need_update()
 	return (need_reset() || film->need_update);
 }
 
-bool Scene::need_reset()
+bool Scene::need_data_update()
 {
 	return (background->need_update
 		|| image_manager->need_update
-		|| camera->need_update
 		|| object_manager->need_update
 		|| mesh_manager->need_update
 		|| light_manager->need_update
@@ -295,6 +298,11 @@ bool Scene::need_reset()
 		|| film->need_update);
 }
 
+bool Scene::need_reset()
+{
+	return need_data_update() || camera->need_update;
+}
+
 void Scene::reset()
 {
 	shader_manager->reset(this);