display-dga : Display using XFree86-DGA extension
display-dga: [-noinput] [-nocursor] [-physz==>sizex>,<sizey>[dpi]] [<display>]
Uses the XFree86 DGA extension to do fullscreen direct framebuffer access on X servers which support this. For systems without kernel framebuffer support, the program must be run as root for this target to be able to mmap /dev/mem.
This option will override the physical screen size reported by the X server, which affects applications which wish to remain resolution independent. sizex, sizey are the x,y size of the screen in millimeters, unless the optional dpi string is affixed, in which case, they represent resolution in dots-per-inch. Yes, there are two equals signs there, for reasons of compatibility with other targets.
The X display to connect to, otherwise defaults to the display specified in DISPLAY.
specifies a framebuffer device to mmap instead of /dev/mem. This allows you to use the DGA target without root privileges!