The `vgagl` driver is a fast linux console driver with full mouse and pm3d support. It looks at the environment variable SVGALIB_DEFAULT_MODE for the default mode; if not set, it uses a 256 color mode with the highest available resolution.
Syntax:
set terminal vgagl \\
background [red] [[green] [blue]] \\
[uniform | interpolate] \\
[dump "file"] \\
[mode]
The color mode can also be given with the mode option. Both Symbolic names as G1024x768x256 and integers are allowed. The `background` option takes either one or three integers in the range [0, 255]. If only one integers is supplied, it is taken as gray value for the background. If three integers are present, the background gets the corresponding color. The (mutually exclusive) options `interpolate` and `uniform` control if color interpolation is done while drawing triangles (on by default).
A file can be specified with the `dump "file"` option. If this option is present, (i.e the dump file name is not empty) pressing the key KP_Delete will write the file. This action cannot and cannot be rebound. The file is written in raw ppm (P6) format. Note that this option is reset each time the `set term` command is issued.
To get high resolution modes, you will probably have to modify the configuration file of libvga, usually /etc/vga/libvga.conf. Using the VESA fb is a good choice, but this needs to be compiled in the kernel.
The vgagl driver uses the first *available* vga mode from the following list:
- the driver which was supplied when setting vgagl, e.g. `set term vgagl
G1024x768x256` would first check, if the G1024x768x256 mode is available.
- the environment variable SVGALIB_DEFAULT_MODE
- G1024x768x256
- G800x600x256
- G640x480x256
- G320x200x256
- G1280x1024x256
- G1152x864x256
- G1360x768x256
- G1600x1200x256