Return number of clipping polygons.

For metrics in editor.

spine-libgdx/spine-libgdx/src/com/esotericsoftware/spine/utils/SkeletonClipping.java

@@ -47,8 +47,8 @@ public class SkeletonClipping {
 	private ClippingAttachment clipAttachment;
 	private Array<FloatArray> clippingPolygons;
 
-	public void clipStart (Slot slot, ClippingAttachment clip) {
-		if (clipAttachment != null) return;
+	public int clipStart (Slot slot, ClippingAttachment clip) {
+		if (clipAttachment != null) return 0;
 		clipAttachment = clip;
 
 		int n = clip.getWorldVerticesLength();
@@ -61,6 +61,7 @@ public class SkeletonClipping {
 			polygon.add(polygon.items[0]);
 			polygon.add(polygon.items[1]);
 		}
+		return clippingPolygons.size;
 	}
 
 	public void clipEnd (Slot slot) {

spine-libgdx/spine-skeletonviewer/src/com/esotericsoftware/spine/SkeletonViewer.java

@@ -908,7 +908,7 @@ public class SkeletonViewer extends ApplicationAdapter {
 		if (os.contains("Windows")) dpiScale = Toolkit.getDefaultToolkit().getScreenResolution() / 96f;
 		if (os.contains("OS X")) {
 			Object object = Toolkit.getDefaultToolkit().getDesktopProperty("apple.awt.contentScaleFactor");
-			if (object instanceof Float && ((Float)object).intValue() == 2) dpiScale = 2;
+			if (object instanceof Float && ((Float)object).intValue() >= 2) dpiScale = 2;
 		}
 		if (dpiScale >= 2.0f) uiScale = 2;