Places a formerly loaded image at the current point on the page. The image is scaled if x and y have
values unequal to 1.
The image data is ascii85 encoding which is only 20 percent larger than the raw binary data of the image
(The binary data is not equal to the file size but somewhat smaller, because the file also contains an
image header.). You can turn on hex encoding by setting the parameter `imageencoding' to `hex'. Hex
encoding doubles the size of the image data.
Since version 0.4.5 of pslib images are fully read and saved into the output postscript file when they
are opened with PS_open_image(3) or PS_open_image_file(3). Later calls of PS_place_image(3) just replay
the image. This behaviour can be turned off by setting the parameter `imagereuse' to false with
PS_set_parameter(3).
If image reuse is not turned of, this function may be called within a template.