src/macosx/classes/com/apple/laf/AquaIcon.java

@@ -192,10 +192,31 @@
     static abstract class CachableJRSUIIcon extends CachingScalingIcon implements UIResource {
         public CachableJRSUIIcon(final int width, final int height) {
             super(width, height);
         }
 
+        // paint the icon directly from the AquaPainter
+        public void paintIcon(final Component c, Graphics g, final int x, final int y) {
+            if (GraphicsEnvironment.isHeadless()) {
+                return;
+            }
+
+            g = g.create();
+
+            if (g instanceof Graphics2D) {
+                // improves icon rendering quality in Quartz
+                ((Graphics2D)g).setRenderingHint(RenderingHints.KEY_RENDERING, RenderingHints.VALUE_RENDER_QUALITY);
+            }
+
+            final AquaPainter<JRSUIState> painter = AquaPainter.create(JRSUIState.getInstance());
+            initIconPainter(painter);
+
+            g.setClip(new Rectangle(x, y, getIconWidth(), getIconHeight()));
+            painter.paint(g, c, x, y, getIconWidth(), getIconHeight());
+            g.dispose();
+        }
+
         Image createImage() {
             final AquaPainter<JRSUIState> painter = AquaPainter.create(JRSUIState.getInstance());
             initIconPainter(painter);
 
             final BufferedImage img = new BufferedImage(getIconWidth(), getIconHeight(), BufferedImage.TYPE_INT_ARGB_PRE);