From f48541961d461cc8eca524f18e1228c778de23d5 Mon Sep 17 00:00:00 2001
From: Zach Pomerantz <zach@highfidelity.io>
Date: Mon, 18 Apr 2016 17:26:29 -0700
Subject: [PATCH] Expose Rates to JS/QML

---
 interface/src/Application.cpp | 28 ++++++++++++++++++++++++++++
 interface/src/Application.h   |  1 +
 2 files changed, 29 insertions(+)

diff --git a/interface/src/Application.cpp b/interface/src/Application.cpp
index 41eb7a305d..5383d130ab 100644
--- a/interface/src/Application.cpp
+++ b/interface/src/Application.cpp
@@ -508,6 +508,26 @@ Q_GUI_EXPORT void qt_gl_set_global_share_context(QOpenGLContext *context);
 
 Setting::Handle<int> sessionRunTime{ "sessionRunTime", 0 };
 
+class Rates : public QObject {
+    Q_OBJECT
+
+    Q_PROPERTY(float render READ getRenderRate)
+    Q_PROPERTY(float present READ getPresentRate)
+    Q_PROPERTY(float newFrame READ getNewFrameRate)
+    Q_PROPERTY(float dropped READ getDropRate)
+    Q_PROPERTY(float simulation READ getSimulationRate)
+    Q_PROPERTY(float avatar READ getAvatarRate)
+
+public:
+    Rates(QObject* parent) : QObject(parent) {}
+    float getRenderRate() { return qApp->getFps(); }
+    float getPresentRate() { return qApp->getActiveDisplayPlugin()->presentRate(); }
+    float getNewFrameRate() { return qApp->getActiveDisplayPlugin()->newFramePresentRate(); }
+    float getDropRate() { return qApp->getActiveDisplayPlugin()->droppedFrameRate(); }
+    float getSimulationRate() { return qApp->getAverageSimsPerSecond(); }
+    float getAvatarRate() { return qApp->getAvatarSimrate(); }
+};
+
 Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     QApplication(argc, argv),
     _window(new MainWindow(desktop())),
@@ -531,6 +551,7 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
     _notifiedPacketVersionMismatchThisDomain(false),
     _maxOctreePPS(maxOctreePacketsPerSecond.get()),
     _lastFaceTrackerUpdate(0)
+
 {
     // FIXME this may be excessively conservative.  On the other hand
     // maybe I'm used to having an 8-core machine
@@ -766,6 +787,8 @@ Application::Application(int& argc, char** argv, QElapsedTimer& startupTimer) :
 
     ResourceCache::setRequestLimit(3);
 
+    _rates = new Rates(this);
+
     _glWidget = new GLCanvas();
     getApplicationCompositor().setRenderingWidget(_glWidget);
     _window->setCentralWidget(_glWidget);
@@ -1390,6 +1413,7 @@ void Application::initializeUi() {
     rootContext->setContextProperty("Preferences", DependencyManager::get<Preferences>().data());
     rootContext->setContextProperty("AddressManager", DependencyManager::get<AddressManager>().data());
     rootContext->setContextProperty("FrameTimings", &_frameTimingsScriptingInterface);
+    rootContext->setContextProperty("Rates", _rates);
 
     rootContext->setContextProperty("TREE_SCALE", TREE_SCALE);
     rootContext->setContextProperty("Quat", new Quat());
@@ -4443,6 +4467,8 @@ void Application::registerScriptEngineWithApplicationServices(ScriptEngine* scri
     // AvatarManager has some custom types
     AvatarManager::registerMetaTypes(scriptEngine);
 
+    scriptEngine->registerGlobalObject("Rates", _rates);
+
     // hook our avatar and avatar hash map object into this script engine
     scriptEngine->registerGlobalObject("MyAvatar", getMyAvatar());
     qScriptRegisterMetaType(scriptEngine, audioListenModeToScriptValue, audioListenModeFromScriptValue);
@@ -5270,3 +5296,5 @@ void Application::showDesktop() {
 CompositorHelper& Application::getApplicationCompositor() const {
     return *DependencyManager::get<CompositorHelper>();
 }
+
+#include "Application.moc"
diff --git a/interface/src/Application.h b/interface/src/Application.h
index 6bfad21525..78424d0f57 100644
--- a/interface/src/Application.h
+++ b/interface/src/Application.h
@@ -399,6 +399,7 @@ private:
     uint32_t _frameCount { 0 };
 
     // Frame Rate Measurement
+    QObject* _rates;
     RateCounter<> _frameCounter;
     RateCounter<> _avatarSimCounter;
     RateCounter<> _simCounter;