intersection
Computes the intersection of the two given rectangles.
The intersection in the image above is the blue outline.
If the two rectangles do not intersect, @res will contain a degenerate rectangle with origin in (0, 0) and a size of 0.
Return
true if the two rectangles intersect
Since
1.0
Parameters
b
a #graphene_rect_t
res
return location for a #graphene_rect_t