Draw a rectangle from top left corner (x,y) of specified width and height
@status current Introduced in 2.0.0, changed in 2.2.0
x,y
(positive numbers) top left corner position
w
(number) width in pixels
h
(number) height in pixels
flags
(unsigned number) drawing flags
t
(number) thickness in pixels, defaults to 1 (only on Horus)
none