Java: Filling a BufferedImage with transparent pixels

Question

I have an off-screen BufferedImage, constructed with the type BufferedImage.TYPE_INT_ARGB. It can contain anything, and I\'m looking for a way to (fairly effic

Answer 1

If you cast the Graphics object to a Graphics2D object, you can set a Composite object thru

AlphaComposite composite = AlphaComposite.getInstance(AlphaComposite.CLEAR, 0.0f);
Graphics2D g2d = (Graphics2D) image.getGraphics();
g2d.setComposite(composite);
g2d.setColor(new Color(0, 0, 0, 0));
g2d.fillRect(0, 0, 10, 10);