diff -r 9903a5edeb56 -r 737f8bb110be MiniDisplay/minidisplay.cpp
--- a/MiniDisplay/minidisplay.cpp	Wed May 28 21:31:03 2014 +0200
+++ b/MiniDisplay/minidisplay.cpp	Thu May 29 14:27:08 2014 +0200
@@ -5,7 +5,7 @@
 const int KMaxReadAttempt=100;
 
 MiniDisplay::MiniDisplay(QQuickItem *parent):
-    QQuickItem(parent),iReadAttempt(0),iBrightness(0)
+    QQuickItem(parent),iReadAttempt(0),iBrightness(iDisplay.MaxBrightness())
 {
     // By default, QQuickItem does not draw anything. If you subclass
     // QQuickItem to create a visual item, you will need to uncomment the
@@ -137,9 +137,47 @@
         painter.drawText(0,metrics.ascent(),strDemo);
     }
     //Save image as PNG for validation
-    image.save("font.png");
+    //image.save("font.png");
     //
-    //int sizeInBytes=image.byteCount();
+    renderImage(&image);
+}
+
+/**
+ * @brief MiniDisplay::renderWindow
+ */
+void MiniDisplay::renderOwnWindow()
+{
+    QImage image=window()->grabWindow();
+    //image.save("window.png");
+    renderImage(&image);
+}
+
+/**
+ * @brief MiniDisplay::render
+ * @param aWindow
+ */
+void MiniDisplay::renderWindow(QQuickWindow* aWindow)
+{
+    QImage image=aWindow->grabWindow();
+    //image.save("window.png");
+    renderImage(&image);
+}
+
+/**
+ * @brief MiniDisplay::render
+ * @param aImage
+ */
+void MiniDisplay::renderImage(QImage* aImage)
+{
+    if (!iDisplay.IsOpen())
+    {
+        return;
+    }
+
+    //Convert our image into a bit array
+    int w=aImage->width();
+    int h=aImage->height();
+
     int pixelCount=w*h;
     BitArray bits(pixelCount);
 
@@ -147,7 +185,7 @@
         {
         for (int j=0;j<h;j++)
             {
-            QRgb color=image.pixel(i,j);
+            QRgb color=aImage->pixel(i,j);
             if (color!=0xffffffff)
                 {
                 bits.SetBit(i*h+j);
@@ -155,26 +193,32 @@
             }
         }
 
-    if (iDisplay.IsOpen())
-    {
-        iDisplay.Clear();
-        iDisplay.BitBlit(bits,w,h,0,0);
-        iDisplay.SwapBuffers();
-    }
-    //
+    //Just blit it then
+    iDisplay.BitBlit(bits,w,h,0,0);
 }
 
-
+/**
+ * @brief MiniDisplay::vendor
+ * @return
+ */
 QString MiniDisplay::vendor()
 {
     return QString::fromWCharArray(iDisplay.Vendor());
 }
 
+/**
+ * @brief MiniDisplay::product
+ * @return
+ */
 QString MiniDisplay::product()
 {
     return QString::fromWCharArray(iDisplay.Product());
 }
 
+/**
+ * @brief MiniDisplay::serialNumber
+ * @return
+ */
 QString MiniDisplay::serialNumber()
 {
     return QString::fromWCharArray(iDisplay.SerialNumber());