Add some timing capabilities

Add some frames-per-second output for debugging when QT_DIRECTFB_TIMING
is defined.

Reviewed-by: Donald <qt-info@nokia.com>

1 files changed, 17 insertions, 1 deletions

diff --git a/src/plugins/gfxdrivers/directfb/qdirectfbsurface.cpp b/src/plugins/gfxdrivers/directfb/qdirectfbsurface.cpp
index c495805..ef208af 100644
--- a/src/plugins/gfxdrivers/directfb/qdirectfbsurface.cpp
+++ b/src/plugins/gfxdrivers/directfb/qdirectfbsurface.cpp
@@ -58,6 +58,10 @@ QDirectFBSurface::QDirectFBSurface(QDirectFBScreen* scr)
     , engine(0)
 {
     setSurfaceFlags(Opaque | Buffered);
+#ifdef QT_DIRECTFB_TIMING
+    frames = 0;
+    timer.start();
+#endif
 }
 
 QDirectFBSurface::QDirectFBSurface(QDirectFBScreen* scr, QWidget *widget)
@@ -72,6 +76,10 @@ QDirectFBSurface::QDirectFBSurface(QDirectFBScreen* scr, QWidget *widget)
         setSurfaceFlags(Opaque | RegionReserved);
     else
         setSurfaceFlags(Opaque | Buffered);
+#ifdef QT_DIRECTFB_TIMING
+    frames = 0;
+    timer.start();
+#endif
 }
 
 QDirectFBSurface::~QDirectFBSurface()
@@ -307,7 +315,6 @@ inline bool isWidgetOpaque(const QWidget *w)
 
     return false;
 }
-
 void QDirectFBSurface::flush(QWidget *widget, const QRegion &region,
                              const QPoint &offset)
 {
@@ -350,6 +357,15 @@ void QDirectFBSurface::flush(QWidget *widget, const QRegion &region,
         dfbSurface->Flip(dfbSurface, &dfbReg, DSFLIP_ONSYNC);
     }
 #endif
+#ifdef QT_DIRECTFB_TIMING
+    enum { Secs = 3 };
+    ++frames;
+    if (timer.elapsed() >= Secs * 1000) {
+        qDebug("%d fps", int(double(frames) / double(Secs)));
+        frames = 0;
+        timer.restart();
+    }
+#endif
 }