Generates an image file containing either the current application display
manager's visual representation of the current scene or (when the
-F
option is specified) the contents of the current
application embedded framebuffer.
The output format of the image file will be deduced from the filename, but
if the caller wishes to ensure a specific format the --format
may be used.
Example 1. Write a PNG image file of the MGED framebuffer contents.
mged>
screengrab -F fb.png
Writes the contents of the active MGED framebuffer to the image file fb.png.
Reports of bugs or problems should be submitted via electronic
mail to <devs@brlcad.org>