1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
|
extern crate glium;
extern crate image;
extern crate getopts;
extern crate time;
use std::env;
use std::process::exit;
use std::thread::sleep;
use std::time::Duration;
use getopts::{Options, Matches};
use glium::glutin::os::unix::WindowBuilderExt;
use glium::{DisplayBuild, Display};
pub mod util;
pub trait ExuberantHack {
fn draw_frame(&mut self, t: f64) -> Result<(), String>;
fn get_display(&self) -> &Display;
}
/// Prints usage/help info for an individual hack
pub fn print_usage(opts: &Options) {
let args: Vec<String> = env::args().collect();
let program = args[0].clone();
let brief = format!("Usage: {} [options]", program);
print!("{}", opts.usage(&brief));
}
/// Executes a hack
pub fn run_hack(hack: &mut ExuberantHack, conf: &Matches) {
loop {
hack.draw_frame(time::precise_time_s()).ok();
for ev in hack.get_display().poll_events() {
match ev {
glium::glutin::Event::Closed => return,
_ => ()
}
}
sleep(Duration::from_millis(30));
}
}
/// Adds and parses most command-line options.
/// This function handles all the generic stuff, like --window-id and --help.
pub fn main_helper(mut opts: Options) -> Matches {
let args: Vec<String> = env::args().collect();
// 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.optopt("", "window-id", "X window id number", "NUM");
opts.optflag("", "fps", "show frames per second (IGNORED)");
opts.optopt("", "delay", "inter-frame delay (0 to 100000) (IGNORED)", "NUM");
let matches = match opts.parse(&args[1..]) {
Ok(m) => { m }
Err(f) => {
print_usage(&opts);
println!("");
println!("{}", f.to_string());
exit(-1);
}
};
if matches.opt_present("help") {
print_usage(&opts);
exit(0);
}
matches
}
pub fn make_display(conf: &Matches) -> glium::Display {
// if no "--window-id", try environment variable (arg has priority though)
let window_id_string: Option<String> =
conf.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());
}
let win_builder: glium::glutin::WindowBuilder = match window_id {
Some(id) =>
glium::glutin::WindowBuilder::new()
.from_existing_window(id),
None => glium::glutin::WindowBuilder::new()
.with_title(format!("Exuberant Hack!"))
.with_depth_buffer(24),
};
let display = win_builder.build_glium().unwrap();
display
}
|