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use std::{
fs::File,
io::Read,
path::{Path, PathBuf},
};
use log::info;
use crate::render::Renderer;
pub struct Tiler {
renderer: Renderer,
}
impl Tiler {
pub fn new(renderer: Renderer) -> Self {
std::fs::create_dir_all("tiles").unwrap();
Self { renderer }
}
pub fn path(z: isize, x: isize, y: isize) -> PathBuf {
Path::new(&format!("tiles/{},{},{}.png", z, x, y)).to_path_buf()
}
pub fn generate_tile(&self, z: isize, x: isize, y: isize) {
info!("generating tile (zoom={z}, x={x}, y={z})");
let segment = self.renderer.render_segment(x, y);
segment.save(Tiler::path(z, x, y)).unwrap();
}
pub fn update_tile(&self, z: isize, x: isize, y: isize) {
// TODO check mtime of region
if Tiler::path(z, x, y).exists() {
return; // already generated
}
self.generate_tile(z, x, y)
}
pub fn get_tile(&self, z: isize, x: isize, y: isize) -> Vec<u8> {
self.update_tile(z, x, y);
let mut f = File::open(Tiler::path(z, x, y)).unwrap();
let mut buf = Vec::new();
f.read_to_end(&mut buf).unwrap();
buf
}
}
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