winit-sonoma-fix/examples/vsync.rs
2015-04-03 02:31:15 -07:00

47 lines
1.3 KiB
Rust

#[cfg(target_os = "android")]
#[macro_use]
extern crate android_glue;
extern crate clock_ticks;
extern crate glutin;
mod support;
#[cfg(target_os = "android")]
android_start!(main);
#[cfg(not(feature = "window"))]
fn main() { println!("This example requires glutin to be compiled with the `window` feature"); }
#[cfg(feature = "window")]
fn resize_callback(width: u32, height: u32) {
println!("Window resized to {}x{}", width, height);
}
#[cfg(feature = "window")]
fn main() {
println!("Vsync example. This example may panic if your driver or your system forces \
you out of vsync. This is intended when `build_strict` is used.");
let mut window = glutin::WindowBuilder::new().with_vsync().build_strict().unwrap();
window.set_window_resize_callback(Some(resize_callback as fn(u32, u32)));
unsafe { window.make_current() };
let context = support::load(&window);
while !window.is_closed() {
let before = clock_ticks::precise_time_ns();
context.draw_frame((0.0, 1.0, 0.0, 1.0));
window.swap_buffers();
for ev in window.poll_events() {
println!("{:?}", ev);
}
let after = clock_ticks::precise_time_ns();
println!("Vsync example - Time of previous frame: {}ms",
(after - before) as f32 / 1000000.0);
}
}