javax/swing/JViewport.java

152     protected transient Image backingStoreImage = null;
607         Graphics bsg = backingStoreImage.getGraphics();
619             g.drawImage(backingStoreImage, 0, 0, this);
630             g.drawImage(backingStoreImage, 0, 0, this);
751         boolean recreateBackingStoreImage = (backingStoreImage == null);
775                 if (backingStoreImage instanceof BackingStoreMultiResolutionImage) {
777                             = (BackingStoreMultiResolutionImage) backingStoreImage;
795             backingStoreImage = createScaledImage(width, height,
853                         g.drawImage(backingStoreImage, 0, 0, this);
948             backingStoreImage = null;