This function reads image data from a file. It can read png, jpeg, gif, tiff, and eps files. png, jpeg,
gif, and tiff images can only be read if pslib has been compiled with support for those formats. Once an
image has been loaded it can be placed on a page with PS_place_image(3).
Since version 0.4.5 of pslib images are read by default for later reuse. This means that the image is
saved into a so called reusable stream object. Later calls of PS_place_image(3) will only put
a short sequence of postscript code into the output file replaying the image. This reduces the overall
postscript file size, speeds up its processing by the postscript rip and allows to place images into
templates. This behaviour can be turned off by setting the parameter `imagereuse' to false with
PS_set_parameter(3).