CGDisplayStreamUpdateRectType.reducedDirtyRects
The union is calculated and then simplified. This reduces the number of rectangles returned to your app, but it may report some pixels that were not actually changed.
Declaration
case reducedDirtyRectsThe union is calculated and then simplified. This reduces the number of rectangles returned to your app, but it may report some pixels that were not actually changed.
case reducedDirtyRects