Returns the width (in pixels) of each element in the specified plane.


size_t IOSurfaceGetElementWidthOfPlane(IOSurfaceRef buffer, size_t planeIndex);


If the planeIndex is greater than or equal to the plane count of the IOSurface, zero is returned.... with one exception. If this IOSurface has zero planes and a planeIndex of zero is passed in, the routines function just like the non-planar APIs. This is to allow higher level code to treat planar and non-planar buffers is a more uniform fashion.