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

For the sake of completeness, here is a working, testing, and fast function that is cross-platform compliant.

  static public BufferedImage createTransparentBufferedImage(int width, int height) {
     // BufferedImage is actually already transparent on my system, but that isn't
     // guaranteed across platforms.
     BufferedImage bufferedImage = new BufferedImage(width, height, 
                        BufferedImage.TYPE_INT_ARGB);
     Graphics2D graphics = bufferedImage.createGraphics();

     // To be sure, we use clearRect, which will (unlike fillRect) totally replace
     // the current pixels with the desired color, even if it's fully transparent.
     graphics.setBackground(new Color(0, true));
     graphics.clearRect(0, 0, width, height);
     graphics.dispose();

     return bufferedImage;
  }