cairo-in-clip (cr x y)

cr -- a cairo-t context
x -- a double float x coordinate of the point to test
y -- a double float y coordinate of the point to test

A non-zero value if the point is inside, or zero if outside.

Tests whether the given point is inside the area that would be visible through the current clip, i.e. the area that would be filled by a call to the cairo-paint function.

See the cairo-clip and cairo-clip-preserve functions.