The cpdf_place_inline_image()
function places an image created with the php image functions
on the page at position (x-coor,
y-coor). The image can be scaled at the same
time.
The optional parameter
mode determines the unit length. If it's 0 or
omitted the default unit as specified for the page is used.
Otherwise the coordinates are measured in postscript points
disregarding the current unit.
See also cpdf_import_jpeg().