public BufferedImage buildBufferFor(Panel panel) {
Dimension dimension = new Dimension(panel.getWidth(), panel.getHeight());
BufferedImage buffer = bufferedImagePool.acquire(dimension);
Graphics2D graphics = buffer.createGraphics();
graphics.setBackground(Colors.TRANSPARENT);
graphics.clearRect(0, 0, panel.getWidth(), panel.getHeight());
panel.paintOn(graphics);
graphics.dispose();
bufferCache.cache(panel, buffer);
return buffer;
}
public void paintClipFor(Panel panel, Graphics2D graphics) {
if (panel.canBeBuffered()) {
BufferedImage panelBuffer = bufferCache.retrieve(panel);
if (shouldBuildBufferFor(panel, panelBuffer)) {
bufferedImagePool.recycle(panelBuffer);
panelBuffer = buildBufferFor(panel);
}
graphics.drawImage(panelBuffer, 0, 0, null);
} else {
panel.paintOn(graphics);
}
}