BGI image
From Just Solve the File Format Problem
The Borland Graphics Interface (BGI) library contains getimage() and putimage() functions to save and load images. The images thus saved have a 4-byte header (two little-endian words giving the image's width and height) followed by the image data, in a form specific to the driver used. A 16-colour VGA image will contain four monochrome bitmaps for the four planes. These images, with a .ICN extension, are used as icons by RIPscrip 1.x and Counterpoint.
