Avoid busy-waiting if renderFrame is skipped

RenderKit · Sep 12, 2018 · e9b8b2c · e9b8b2c
1 parent 211f7f9
commit e9b8b2c
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Showing 2 changed files with 6 additions and 1 deletion.
diff --git a/apps/common/sg/SceneGraph.cpp b/apps/common/sg/SceneGraph.cpp
@@ -124,7 +124,7 @@ namespace ospray {
 
       if (accumBudgetReached || varianceReached) {
         etaSeconds = elapsedSeconds();
-        return fbNode;//XXX false;
+        return nullptr;
       }
 
       if (numAccumulatedFrames == 0)

diff --git a/apps/exampleViewer/common/util/AsyncRenderEngine.cpp b/apps/exampleViewer/common/util/AsyncRenderEngine.cpp
@@ -50,6 +50,11 @@ namespace ospray {
       if (frameCancelled.exchange(false))
         return; // actually a continue
 
+      if (!sgFB) {
+        std::this_thread::sleep_for(std::chrono::milliseconds(15));
+        return; // actually a continue
+      }
+
       // NOTE(jda) - Spin here until the consumer has had the chance to update
       //             to the latest frame.
       while(state == ExecState::RUNNING && newPixels == true);