Even though the fixed-position element's container is nonscrollable, it should still be composited because one of its ancestors is scrolling.
-(GraphicsLayer
- (bounds 800.00 600.00)
- (children 1
- (GraphicsLayer
- (bounds 800.00 600.00)
- (contentsOpaque 1)
- (drawsContent 1)
- (children 1
- (GraphicsLayer
- (position 10.00 100.00)
- (bounds 100.00 100.00)
- (contentsOpaque 1)
- (drawsContent 1)
- (backgroundColor #00FF00)
- )
- )
- )
- )
-)
+{
+ "bounds": [800, 600],
+ "children": [
+ {
+ "bounds": [800, 600],
+ "contentsOpaque": true,
+ "drawsContent": true
+ }
+ ]
+}