elisp: PostScript Images

 
 37.17.5 PostScript Images
 -------------------------
 
 To use PostScript for an image, specify image type ‘postscript’.  This
 works only if you have Ghostscript installed.  You must always use these
 three properties:
 
 ‘:pt-width WIDTH’
      The value, WIDTH, specifies the width of the image measured in
      points (1/72 inch).  WIDTH must be an integer.
 
 ‘:pt-height HEIGHT’
      The value, HEIGHT, specifies the height of the image in points
      (1/72 inch).  HEIGHT must be an integer.
 
 ‘:bounding-box BOX’
      The value, BOX, must be a list or vector of four integers, which
      specifying the bounding box of the PostScript image, analogous to
      the ‘BoundingBox’ comment found in PostScript files.
 
           %%BoundingBox: 22 171 567 738