A #PopplerRectangle is used to describe locations on a page and bounding boxes
Creates a new #PopplerRectangle
x coordinate of lower left corner
x coordinate of upper right corner
y coordinate of lower left corner
y coordinate of upper right corner
Creates a copy of rectangle
rectangle
Frees the given #PopplerRectangle
A #PopplerRectangle is used to describe locations on a page and bounding boxes