animation.rs

use webp::AnimEncoder;
use webp::AnimFrame;
use webp::WebPConfig;
fn main() {
    let width = 32u32;
    let height = 32u32;
    fn dumy_image(width: u32, height: u32, color: [u8; 4]) -> Vec<u8> {
        let mut pixels = Vec::with_capacity(width as usize * height as usize * 4);
        for _ in 0..(width * height) {
            pixels.push(color[0]); //red
            pixels.push(color[1]); //green
            pixels.push(color[2]); //blue
            pixels.push(color[3]); //alpha
        }
        pixels
    }
    let mut config = WebPConfig::new().unwrap();
    config.lossless = 1;
    config.alpha_compression = 0;
    config.quality = 75f32;
    let mut encoder = AnimEncoder::new(width, height, &config);
    encoder.set_bgcolor([255, 0, 0, 255]);
    encoder.set_loop_count(3);
    let mut time_ms = 1000;

    let v = dumy_image(width, height, [255, 0, 0, 255]);
    encoder.add_frame(AnimFrame::from_rgba(&v, width, height, time_ms));
    time_ms += 750;

    let v = dumy_image(width, height, [0, 255, 0, 255]);
    encoder.add_frame(AnimFrame::from_rgba(&v, width, height, time_ms));
    time_ms += 500;

    let v = dumy_image(width, height, [0, 0, 255, 255]);
    encoder.add_frame(AnimFrame::from_rgba(&v, width, height, time_ms));
    time_ms += 250;

    let v = dumy_image(width, height, [0, 0, 0, 0]);
    encoder.add_frame(AnimFrame::from_rgba(&v, width, height, time_ms));

    let webp = encoder.encode();
    let output_path = std::path::Path::new("assets")
        .join("dumy_anim")
        .with_extension("webp");
    std::fs::write(&output_path, &*webp).unwrap();
}