How to use

Thumber$Pictures

in

com.atlassian.core.util.thumbnail

public static BufferedImage toBufferedImage(Image image) {
  if (image instanceof BufferedImage) {
    return (BufferedImage) image;
  }
  // This code ensures that all the pixels in the image are loaded
  image = new ImageIcon(image).getImage();
  // Determine if the image has transparent pixels
  boolean hasAlpha = hasAlpha(image);
  // Create a buffered image using the default color model
  int type = hasAlpha ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB;
  BufferedImage bimage = new BufferedImage(image.getWidth(null), image.getHeight(null), type);
  // Copy image to buffered image
  Graphics g = bimage.createGraphics();
  // Paint the image onto the buffered image
  g.drawImage(image, 0, 0, null);
  g.dispose();
  return bimage;
}

/**
 * This method should take BufferedImage argument, but takes just Image for backward compatibility (so that the
 * client code can stay intact). Normally anyway a BufferedImage instance will be provided and the image will be
 * directly processed without transforming it to BufferedImage first.
 *
 * @param imageToScale  image to scale (BufferedImage is welcome, other image types will be transformed to
 *                      BufferedImage first)
 * @param newDimensions desired max. dimensions
 * @return scaled image
 */
public BufferedImage scaleImage(Image imageToScale, ThumbnailDimension newDimensions) {
  final BufferedImage sourceImage = Pictures.toBufferedImage(imageToScale);
  final Image scaledInstance = sourceImage.getScaledInstance(newDimensions.getWidth(), newDimensions.getHeight(), Image.SCALE_SMOOTH);
  final BufferedImage bufferedScaledImage = new BufferedImage(newDimensions.getWidth(), newDimensions.getHeight(),
      Pictures.hasAlpha(imageToScale) ? BufferedImage.TYPE_INT_ARGB : BufferedImage.TYPE_INT_RGB);
  final Graphics graphics = bufferedScaledImage.getGraphics();
  try {
    graphics.drawImage(scaledInstance, 0, 0, null);
  } finally {
    graphics.dispose();
  }
  return bufferedScaledImage;
}