public PaintJob(Box clip, Color background) {
bufferCache = Context.instance().bufferedImageCache;
bufferedImagePool = Context.instance().bufferedImagePool;
this.clip = clip;
buffer = bufferedImagePool.acquire(clip.getSize());
rootGraphics = buffer.createGraphics();
rootGraphics.setBackground(background);
rootGraphics.clearRect(0, 0, clip.width, clip.height);
composite = rootGraphics.getComposite();
}
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);
}
}