The cpdf_import_jpeg() function opens an image stored in the file with the name file_name. The format of the image has to be jpeg. The image is placed on the current page at position (x-coor, y-coor). The image is rotated by angle degrees. gsave should be non-zero to allow this function to operate correctly.
The optional parameter mode determines the unit length. If it is 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_place_inline_image().