argbAt
Returns one physical pixel without changing the image.
Return
the straight, non-premultiplied ARGB value whose alpha occupies bits 24 through 31, red bits 16 through 23, green bits 8 through 15, and blue bits 0 through 7, matching the ARGB value contract.
Parameters
x
the physical x coordinate.
y
the physical y coordinate.
Throws
when a coordinate is outside the image.