Sometime we need to show camera viewfinder in a portrait application, but also cover the screen as much as posible.
When viewfinder is used in portrait mode, it is displayed as landcape, so the virefinder size is something as 360x280 (4/3, 16:9).
To cover the screen correctly we need a to display camera roatate, but it also viewfinder image is rotated.
The ideea is to have the view finder in a raport of 3/4 , 9:16 and the image to be correctly orientation.