/**
* Gets (creates if necessary) disabled icon based on the passed one.
*
* @return <code>ImageIcon</code> constructed from disabled image of passed icon.
*/
@Nullable
public static Icon getDisabledIcon(Icon icon) {
if (icon instanceof LazyIcon) icon = ((LazyIcon) icon).getOrComputeIcon();
if (icon == null) return null;
Icon disabledIcon = ourIcon2DisabledIcon.get(icon);
if (disabledIcon == null) {
if (!isGoodSize(icon)) {
LOG.error(icon); // # 22481
return EMPTY_ICON;
}
final int scale = UIUtil.isRetina() ? 2 : 1;
@SuppressWarnings("UndesirableClassUsage")
BufferedImage image =
new BufferedImage(
scale * icon.getIconWidth(),
scale * icon.getIconHeight(),
BufferedImage.TYPE_INT_ARGB);
final Graphics2D graphics = image.createGraphics();
graphics.setColor(UIUtil.TRANSPARENT_COLOR);
graphics.fillRect(0, 0, icon.getIconWidth(), icon.getIconHeight());
graphics.scale(scale, scale);
icon.paintIcon(LabelHolder.ourFakeComponent, graphics, 0, 0);
graphics.dispose();
Image img = ImageUtil.filter(image, UIUtil.getGrayFilter());
if (UIUtil.isRetina()) img = RetinaImage.createFrom(img, 2, ImageLoader.ourComponent);
disabledIcon = new JBImageIcon(img);
ourIcon2DisabledIcon.put(icon, disabledIcon);
}
return disabledIcon;
}