boolean contentsLost = false;
            BufferInfo bufferInfo = getBufferInfo(root);
            if (bufferInfo == null) {
                contentsLost = true;
                bufferInfo = new BufferInfo(root);
                bufferInfos.add(bufferInfo);
                if (LOGGER.isLoggable(Level.FINER)) {
                    LOGGER.finer("prepare: new BufferInfo: " + root);
                }
            }
            this.bufferInfo = bufferInfo;
            if (!bufferInfo.hasBufferStrategyChanged()) {
                bufferStrategy = bufferInfo.getBufferStrategy(true);
                if (bufferStrategy != null) {
                    bsg = bufferStrategy.getDrawGraphics();
                    if (bufferStrategy.contentsRestored()) {
                        contentsLost = true;
                        if (LOGGER.isLoggable(Level.FINER)) {
                            LOGGER.finer(
                                "prepare: contents restored in prepare");
                        }
                    }
                }
                else {
                    // Couldn't create BufferStrategy, fallback to normal
                    // painting.
                    return false;
                }
                if (bufferInfo.getContentsLostDuringExpose()) {
                    contentsLost = true;
                    bufferInfo.setContentsLostDuringExpose(false);
                    if (LOGGER.isLoggable(Level.FINER)) {
                        LOGGER.finer("prepare: contents lost on expose");
                    }
                }
                if (isPaint && c == rootJ && x == 0 && y == 0 &&
                      c.getWidth() == w && c.getHeight() == h) {
                    bufferInfo.setInSync(true);
                }
                else if (contentsLost) {
                    // We either recreated the BufferStrategy, or the contents
                    // of the buffer strategy were restored.  We need to
                    // repaint the root pane so that the back buffer is in sync
                    // again.
                    bufferInfo.setInSync(false);
                    if (!isRepaintingRoot()) {
                        repaintRoot(rootJ);
                    }
                    else {
                        // Contents lost twice in a row, punt
                        resetDoubleBufferPerWindow();
                    }
                }
                return (bufferInfos != null);
            }
        }
        return false;
    }

    private boolean fetchRoot(JComponent c) {
        boolean encounteredHW = false;
        rootJ = c;
        root = c;
        xOffset = yOffset = 0;
        while (root != null && (!(root instanceof Window) &&
                                !(root instanceof Applet))) {
            xOffset += root.getX();
            yOffset += root.getY();
            root = root.getParent();
            if (root != null) {
                if (root instanceof JComponent) {
                    rootJ = (JComponent)root;
                }
                else if (!root.isLightweight()) {
                    if (!encounteredHW) {
                        encounteredHW = true;
                    }
                    else {
                        // We've encountered two hws now and may have
                        // a containment hierarchy with lightweights containing
                        // heavyweights containing other lightweights.
                        // Heavyweights poke holes in lightweight
                        // rendering so that if we call show on the BS
                        // (which is associated with the Window) you will
                        // not see the contents over any child
                        // heavyweights.  If we didn't do this when we
                        // went to show the descendants of the nested hw
                        // you would see nothing, so, we bail out here.
                        return false;
                    }
                }
            }
        }
        if ((root instanceof RootPaneContainer) &&
            (rootJ instanceof JRootPane)) {
            // We're in a Swing heavyeight (JFrame/JWindow...), use double
            // buffering if double buffering enabled on the JRootPane and
            // the JRootPane wants true double buffering.
            if (rootJ.isDoubleBuffered() &&
                    ((JRootPane)rootJ).getUseTrueDoubleBuffering()) {