try {
                            wait();
                        } catch (InterruptedException ie) {
                        }
                    }
                    bufferInfos = BufferStrategyPaintManager.this.bufferInfos;
                    BufferStrategyPaintManager.this.bufferInfos = null;
                }
                dispose(bufferInfos);
            }
        });
    }

    private void dispose(java.util.List<BufferInfo> bufferInfos) {
        if (LOGGER.isLoggable(Level.FINER)) {
            LOGGER.log(Level.FINER, "BufferStrategyPaintManager disposed",
                       new RuntimeException());
        }
        if (bufferInfos != null) {
            for (BufferInfo bufferInfo : bufferInfos) {
                bufferInfo.dispose();
            }
        }
    }

    /**
     * Shows the specified region of the back buffer.  This will return
     * true if successful, false otherwise.  This is invoked on the
     * toolkit thread in response to an expose event.
     */
    public boolean show(Container c, int x, int y, int w, int h) {
        synchronized(this) {
            if (painting) {
                // Don't show from backbuffer while in the process of
                // painting.
                return false;
            }
            showing = true;
        }
        try {
            BufferInfo info = getBufferInfo(c);
            BufferStrategy bufferStrategy;
            if (info != null && !info.usingFlip && info.isInSync() &&
                (bufferStrategy = info.getBufferStrategy(false)) != null) {
                SubRegionShowable bsSubRegion = 
                        (SubRegionShowable)bufferStrategy;
                boolean paintAllOnExpose = info.getPaintAllOnExpose();
                info.setPaintAllOnExpose(false);
                if (bsSubRegion.validateAndShow(x, y, (x + w), (y + h))) {
                    return !paintAllOnExpose;
                }
                // Mark the buffer as needing to be repainted.  We don't
                // immediately do a repaint as this method will return false
                // indicating a PaintEvent should be generated which will
                // trigger a complete repaint.
                bufferInfo.setContentsLostDuringExpose(true);
            }
        }
        finally {
            synchronized(this) {
                showing = false;
                notifyAll();
            }
        }
        return false;
    }

    public boolean paint(JComponent paintingComponent,
                         JComponent bufferComponent, Graphics g,
                         int x, int y, int w, int h) {
        if (prepare(paintingComponent, true, x, y, w, h)) {
            if ((g instanceof SunGraphics2D) &&
                    ((SunGraphics2D)g).getDestination() == root) {
                // BufferStrategy may have already constrained the Graphics. To
                // account for that we revert the constrain, then apply a
                // constrain for Swing on top of that.
                int cx = ((SunGraphics2D)bsg).constrainX;
                int cy = ((SunGraphics2D)bsg).constrainY;
                if (cx != 0 || cy != 0) {
                    bsg.translate(-cx, -cy);
                }
                ((SunGraphics2D)bsg).constrain(xOffset + cx, yOffset + cy,
                                               x + w, y + h);
                bsg.setClip(x, y, w, h);
                paintingComponent.paintToOffscreen(bsg, x, y, w, h,
                                                   x + w, y + h);
                accumulate(xOffset + x, yOffset + y, w, h);
                return true;
            } else {
                // Assume they are going to eventually render to the screen.
                // This disables showing from backbuffer until a complete
                // repaint occurs.
                bufferInfo.setInSync(false);
                // Fall through to old rendering.
            }
        }
        // Invalid root, do what Swing has always done.
        if (LOGGER.isLoggable(Level.FINER)) {
            LOGGER.finer("prepare failed");
        }