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#[macro_use]
extern crate glium;
extern crate image;
extern crate getopts;
use std::env;
use std::u64;
use std::process::exit;
use getopts::{Options, Matches};
use glium::glutin::os::unix::WindowBuilderExt;
pub mod util;
fn print_usage(program: &str, opts: Options) {
let brief = format!("Usage: {} [options]", program);
print!("{}", opts.usage(&brief));
}
pub fn generic_main(mut opts: Options) -> (Matches, Option<u64>) {
let args: Vec<String> = env::args().collect();
let program = args[0].clone();
// Turn, eg, "-root" into "--root"
let args = util::convert_xscreensaver_args(args);
// Common Args (all screensavers)
opts.optflag("h", "help", "print this help menu");
opts.optflag("", "window", "run in a window (IGNORED)");
opts.optflag("", "root", "run in root window (IGNORED)");
opts.optflag("", "fps", "show frames per second (IGNORED)");
opts.optopt("", "window-id", "X window id number", "NUM");
let matches = match opts.parse(&args[1..]) {
Ok(m) => { m }
Err(f) => {
print_usage(&program, opts);
println!("");
println!("{}", f.to_string());
exit(-1);
}
};
if matches.opt_present("help") {
print_usage(&program, opts);
exit(0);
}
// if no "--window-id", try environment variable (arg has priority though)
let window_id_string: Option<String> =
matches.opt_str("window-id")
.or(env::var("XSCREENSAVER_WINDOW").ok());
let window_id = window_id_string.map(|id| match util::dechex2u64(&id) {
Ok(y) => y,
Err(e) => {
println!("Couldn't parse numerical argument: {}", e);
exit(-1); },
});
if window_id.is_some() {
println!("Drawing on existing X window: 0x{:07X}", window_id.unwrap());
}
(matches, window_id)
}
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