use cursor_icon::CursorIcon;
use sctk::reexports::client::protocol::wl_shm::Format;
use sctk::shm::slot::{Buffer, SlotPool};
use crate::cursor::CursorImage;
#[derive(Debug)]
pub enum SelectedCursor {
Named(CursorIcon),
Custom(CustomCursor),
}
impl Default for SelectedCursor {
fn default() -> Self {
Self::Named(Default::default())
}
}
#[derive(Debug)]
pub struct CustomCursor {
pub buffer: Buffer,
pub w: i32,
pub h: i32,
pub hotspot_x: i32,
pub hotspot_y: i32,
}
impl CustomCursor {
pub(crate) fn new(pool: &mut SlotPool, image: &CursorImage) -> Self {
let (buffer, canvas) = pool
.create_buffer(
image.width as i32,
image.height as i32,
4 * (image.width as i32),
Format::Argb8888,
)
.unwrap();
for (canvas_chunk, rgba) in canvas.chunks_exact_mut(4).zip(image.rgba.chunks_exact(4)) {
let alpha = rgba[3] as f32 / 255.;
let r = (rgba[0] as f32 * alpha) as u32;
let g = (rgba[1] as f32 * alpha) as u32;
let b = (rgba[2] as f32 * alpha) as u32;
let color = ((rgba[3] as u32) << 24) + (r << 16) + (g << 8) + b;
let array: &mut [u8; 4] = canvas_chunk.try_into().unwrap();
*array = color.to_le_bytes();
}
CustomCursor {
buffer,
w: image.width as i32,
h: image.height as i32,
hotspot_x: image.hotspot_x as i32,
hotspot_y: image.hotspot_y as i32,
}
}
}