Apachai.Effects.Core.PixelOp.ComputeAlpha C# (CSharp) Method

Computes alpha for r OVER l operation.

public static ComputeAlpha ( byte la, byte ra ) : byte
la	byte
ra	byte
return	byte

        public static byte ComputeAlpha(byte la, byte ra)
        {
            return (byte)(((la * (256 - (ra + (ra >> 7)))) >> 8) + ra);
        }

PixelOp