gtk:snapshot-scale-3d (snapshot xfactor yfactor zfactor)

snapshot -- a gtk:snapshot object
xfactor -- a number coerced to a single float for the scaling factor on the X axis
yfactor -- a number coerced to a single float for the scaling factor on the Y axis
zfactor -- a number coerced to a single float for the scaling factor on the Z axis

Scales the coordinate system of the snapshot by the given factors. Use the gtk:snapshot-scale function to scale in 2-dimensional space.