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use std::fs::File;
use std::io::Read;
use std::time::Duration;
use anyhow::{anyhow, Context};
use smithay::backend::allocator::Fourcc;
use smithay::backend::renderer::element::texture::TextureBuffer;
use smithay::backend::renderer::gles::{GlesRenderer, GlesTexture};
use smithay::reexports::nix::time::{clock_gettime, ClockId};
use smithay::utils::{Logical, Physical, Point, Rectangle, Transform};
use xcursor::parser::parse_xcursor;
use xcursor::CursorTheme;
const CURSOR_SIZE: u32 = 24;
static FALLBACK_CURSOR_DATA: &[u8] = include_bytes!("../resources/cursor.rgba");
pub fn get_monotonic_time() -> Duration {
Duration::from(clock_gettime(ClockId::CLOCK_MONOTONIC).unwrap())
}
pub fn center(rect: Rectangle<i32, Logical>) -> Point<i32, Logical> {
rect.loc + rect.size.downscale(2).to_point()
}
fn load_xcursor() -> anyhow::Result<xcursor::parser::Image> {
let theme = CursorTheme::load("default");
let path = theme
.load_icon("default")
.ok_or_else(|| anyhow!("no default icon"))?;
let mut file = File::open(path).context("error opening cursor icon file")?;
let mut buf = vec![];
file.read_to_end(&mut buf)
.context("error reading cursor icon file")?;
let images = parse_xcursor(&buf).context("error parsing cursor icon file")?;
let nearest_image = images
.iter()
.min_by_key(|image| (CURSOR_SIZE as i32 - image.size as i32).abs())
.unwrap();
let frame = images
.iter()
.find(move |image| {
image.width == nearest_image.width && image.height == nearest_image.height
})
.unwrap();
Ok(frame.clone())
}
pub fn load_default_cursor(
renderer: &mut GlesRenderer,
) -> (TextureBuffer<GlesTexture>, Point<i32, Physical>) {
let frame = match load_xcursor() {
Ok(frame) => frame,
Err(err) => {
warn!("error loading xcursor default cursor: {err:?}");
xcursor::parser::Image {
size: 32,
width: 64,
height: 64,
xhot: 1,
yhot: 1,
delay: 1,
pixels_rgba: Vec::from(FALLBACK_CURSOR_DATA),
pixels_argb: vec![],
}
}
};
let texture = TextureBuffer::from_memory(
renderer,
&frame.pixels_rgba,
Fourcc::Abgr8888,
(frame.width as i32, frame.height as i32),
false,
1,
Transform::Normal,
None,
)
.unwrap();
(texture, (frame.xhot as i32, frame.yhot as i32).into())
}
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