Display Ghostscript (DGS) is functionally
upward-compatible with Adobe Display PostScript,
but it has been written independently. The Display
Ghostscript System provides a device-independent
imaging model for displaying information on a
screen. The imaging model uses the PostScript
language which has powerful graphics capabilities
and frees the programmer from display-specific
details like screen resolution and color issues.
DGS is an integral part of the GNUstep Development
Environment.