ImageScaler.java 文件源码

/**
 * Returns the transparency. Returns either OPAQUE, BITMASK, or TRANSLUCENT.
 *
 * @param image
 *            The image.
 * @return the transparency of this ColorModel.
 */
private int getTransparency(Image image) {
    if (image instanceof BufferedImage) {
        BufferedImage bimage = (BufferedImage) image;
        return bimage.getColorModel().getTransparency();
    }
    PixelGrabber pg = new PixelGrabber(image, 0, 0, 1, 1, false);
    try {
        if (pg.grabPixels() && pg.getColorModel() != null) {
            return pg.getColorModel().getTransparency();
        }
    } catch (InterruptedException e) {
        LOGGER.warn(e.getMessage());
    }
    // fallback to generic type
    return Transparency.TRANSLUCENT;
}