QML_RENDER_TIMING: Add time since last frame to output

This is quite useful to see how much time the rest of the app takes.
The same information has been available in QtQuick1.

Change-Id: I31ae91bfa764a4d8013af80de9459514ed72314f
Reviewed-by: Gunnar Sletta <gunnar.sletta@nokia.com>
Reviewed-by: Sean Harmer <sean.harmer@kdab.com>

diff --git a/src/quick/items/qquickthreadedwindowmanager.cpp b/src/quick/items/qquickthreadedwindowmanager.cpp
index 3d480ce..653192b 100644 (file)
--- a/src/quick/items/qquickthreadedwindowmanager.cpp
+++ b/src/quick/items/qquickthreadedwindowmanager.cpp
@@ -476,10 +476,14 @@ void QQuickRenderThreadSingleContextWindowManager::run()
 
 #ifdef QQUICK_RENDER_TIMING
             if (qquick_render_timing()) {
+                static QTime lastFrameTime = QTime::currentTime();
                 swapTime = threadTimer.elapsed() - renderTime;
                 qDebug() << "- Breakdown of frame time; sync:" << syncTime
                          << "ms render:" << renderTime << "ms swap:" << swapTime
-                         << "ms total:" << swapTime + renderTime << "ms";
+                         << "ms total:" << swapTime + renderTime
+                         << "ms time since last frame:" << (lastFrameTime.msecsTo(QTime::currentTime()))
+                         << "ms";
+                lastFrameTime = QTime::currentTime();
             }
 #endif
 

diff --git a/src/quick/items/qquickwindowmanager.cpp b/src/quick/items/qquickwindowmanager.cpp
index 930e2a9..d864d72 100644 (file)
--- a/src/quick/items/qquickwindowmanager.cpp
+++ b/src/quick/items/qquickwindowmanager.cpp
@@ -261,10 +261,14 @@ void QQuickTrivialWindowManager::renderWindow(QQuickWindow *window)
     }
 
     if (qquick_render_timing()) {
+        static QTime lastFrameTime = QTime::currentTime();
         const int swapTime = renderTimer.elapsed() - renderTime;
         qDebug() << "- Breakdown of frame time; sync:" << syncTime
                  << "ms render:" << renderTime << "ms swap:" << swapTime
-                 << "ms total:" << swapTime + renderTime << "ms";
+                 << "ms total:" << swapTime + renderTime
+                 << "ms time since last frame:" << (lastFrameTime.msecsTo(QTime::currentTime()))
+                 << "ms";
+        lastFrameTime = QTime::currentTime();
     }
 
     // Might have been set during syncSceneGraph()