fbclear — clear a frame buffer image
fbclear
is used to erase a frame buffer using whatever method is efficient for the
device being accessed.
By default, the selected color will be flooded into the color planes.
If the
-c
option is used,
a standard linear colormap will be loaded and the pan and zoom values
will be reset.
If the optional color values are given, fbclear writes the specified color over the entire image. The color values must be in the range 0 to 255. In the second form shown above, the single gray_value is written into all three color channels.
The frame buffer to be cleared is determined from the
-F
option if given.
Otherwise the environment variable
FB_FILE
is used to select the display device (see
brlcad(1)).
If this variable is not set, the default device for your system will
be used.
In addition to those flags shown above, the
-W
(or -w)
width,
-N
(or -n)
height,
and
-S
(or -s)
square_size
options can be used to set the size of the output frame buffer.