September 2007
Intermediate to advanced
1040 pages
31h 23m
English
Other bitmap formats exist. Usually they are connected to hardware manufacturers. For instance, the Hewlett-Packard printers, at one time, used a font format called HP Soft Font [176, Chapter 7], with the file extensions .sfp ('p' for "portrait") and .sfl ('l' for "landscape"). Why did we need two different formats for portrait mode and landscape mode? Because these printers' page-description language (called "PCL") did not by default support the automatic rotation of glyphs when we switched from one printing format to the other. Being accustomed to the PostScript language, we no longer think about problems of this kind.