fbtext

#!/usr/bin/python3
"""
Usage:

    fbtext [options] [--] ["arbitrary text"]

Write arbitrary text to frame buffer.

Options are:

    -b width                - screen border width, default is 0 (no border)
    -c [fg:]bg              - foreground and background colors
    -d device               - framebuffer device
    -f path/to/font         - specify font file (should be monospaced)
    -m                      - text margin in pixels, default is 10
    -s style                - the font style, default is "@c".

If no text is provided then it will be read from stdin.

If specified background color is "transparent" (or specifies a transparent
alpha), then existing framebuffer content will be overlayed.
"""

import os, sys, getopt

try: import screen                 # works if this executable is in the fbtools directory
except: from fbtools import screen # works if fbtools is installed as a package


border = 0
fg = None
bg = None
device = None
font = None
margin = 10
style = None

try:
    opts, args = getopt.getopt(sys.argv[1:],"b:c:d:f:g:m:s:wx")

    for opt, arg in opts:
        if   opt == "-b": border = int(arg)
        elif opt == "-c": fg, bg = (i or None for i in ([None]+arg.split(':'))[-2:])
        elif opt == "-d": device = arg
        elif opt == "-f": font = arg
        elif opt == "-m": margin = int(arg)
        elif opt == "-s": style = arg
        else: raise Exception("Invalid option '%s'" % opt)

except Exception as e:
    print (str(e), "\n", __doc__, file = sys.stderr)
    quit(1)

if not args or (len(args)==1 and args[0] == "-"):
    # no text or legacy "-", read from stdin
    text = str(sys.stdin.buffer.read(),"utf8")
else:
    # else use command line
    text = " ".join(args)

margin += border

# Init the screen
screen = screen.Screen(fbdev=device, fg=fg, bg=bg, font=font, style=style, border=border)

# Add the text
screen.child(left=margin, top=margin, right=-margin, bottom=-margin).text(text).merge()

# Show it
screen.display()