The cpdf_page_init() function
starts a new page with height
height and width
width. The page has number
page number and orientation
orientation.
orientation can be 0 for portrait and 1 for
landscape. The last optional parameter
unit sets the unit for the coordinate system. The
value should be the number of postscript points per unit.
Since one inch is equal to 72 points, a value of 72 would set
the unit to one inch. The default is also 72.
See also
cpdf_set_current_page().