OptionalblurThe radius of the blur in points. It defines the value of the standard deviation to the Gaussian function.
OptionalcolorColor is represented as a four-element array. The four elements represent values for red, green, blue, and alpha in that order. Values range from 0 through 255.
Effect type.
OptionalxoffsetThe distance of the shadow on the x-axis in points.
OptionalyoffsetThe distance of the shadow on the y-axis in points.
An Effect Function for the drop-shadow effect.