winit-sonoma-fix/examples/window_icon.rs
Kirill Chibisov 793c535b01
Revert "Propagate error from EventLoop creation" (#3010)
This reverts commit ed26dd58fd.
The patched was merged with a review by accident.
2023-08-06 06:07:01 +04:00

65 lines
2.1 KiB
Rust

#![allow(clippy::single_match)]
use std::path::Path;
use simple_logger::SimpleLogger;
use winit::{
event::Event,
event_loop::EventLoop,
window::{Icon, WindowBuilder},
};
#[path = "util/fill.rs"]
mod fill;
fn main() -> Result<(), impl std::error::Error> {
SimpleLogger::new().init().unwrap();
// You'll have to choose an icon size at your own discretion. On X11, the desired size varies
// by WM, and on Windows, you still have to account for screen scaling. Here we use 32px,
// since it seems to work well enough in most cases. Be careful about going too high, or
// you'll be bitten by the low-quality downscaling built into the WM.
let path = concat!(env!("CARGO_MANIFEST_DIR"), "/examples/icon.png");
let icon = load_icon(Path::new(path));
let event_loop = EventLoop::new();
let window = WindowBuilder::new()
.with_title("An iconic window!")
// At present, this only does anything on Windows and X11, so if you want to save load
// time, you can put icon loading behind a function that returns `None` on other platforms.
.with_window_icon(Some(icon))
.build(&event_loop)
.unwrap();
event_loop.run(move |event, _, control_flow| {
control_flow.set_wait();
if let Event::WindowEvent { event, .. } = event {
use winit::event::WindowEvent::*;
match event {
CloseRequested => control_flow.set_exit(),
DroppedFile(path) => {
window.set_window_icon(Some(load_icon(&path)));
}
_ => (),
}
} else if let Event::RedrawRequested(_) = event {
fill::fill_window(&window);
}
})
}
fn load_icon(path: &Path) -> Icon {
let (icon_rgba, icon_width, icon_height) = {
let image = image::open(path)
.expect("Failed to open icon path")
.into_rgba8();
let (width, height) = image.dimensions();
let rgba = image.into_raw();
(rgba, width, height)
};
Icon::from_rgba(icon_rgba, icon_width, icon_height).expect("Failed to open icon")
}