fbcmrot — rotate the color map
fbcmrot rotates the color map, cycling each color map entry through all of the color map positions. The frames_per_second is the number of shifts per second to generate. This value can be fractional. An unspecified frame rate causes the program to cycle through the color maps as fast as possible. A frames_per_second of zero causes the program to make one step and then exit.
Each step shifts the colormap one position toward smaller
values (with a linear colormap this would cause displayed pixels
to get brighter). The
option allows a shift of more than one position. If
is negative, the colormap will be shifted the opposite
direction (toward larger values).
By default, the framebuffer is assumed to be 512x512 pixels.
flag changes this to 1024x1024.
This is only important for devices such as the Adage framebuffers
which operate differently depending on the display size.
This software is Copyright (c) 1989-2016 by the United States Government as represented by U.S. Army Research Laboratory.