use fonterator as font; // For parsing font file.
// For rendering text
use footile::{FillRule, Plotter, PathOp, Transform};
use png_pong::Encoder; // For saving PNG
use pix::{
    Raster,
    rgb::{Rgba8p, SRgba8},
    matte::{Matte8},
    ops::{SrcOver}
};

const FONT_SIZE: f32 = 32.0;

fn main() {
    // Example Text
    let english = "Raster Text With Font";
    let korean = "글꼴로 래스터 텍스트 사용";
    let japanese = "フォント付きラスタテキスト";

    // Init font, and paths.
    let font = font::monospace_font();

    // Render English Left Aligned.
    let mut p = Plotter::new(Raster::with_clear(512, 512));
    let mut r = Raster::with_clear(512, 512);
    p.set_transform(Transform::with_scale(FONT_SIZE, FONT_SIZE));
    let path = font.render(
        english,
        (512.0 - 64.0) / FONT_SIZE,
        font::TextAlign::Left
    ).0;
    r.composite_matte(
        (64, 0, 512, 512),
        p.fill(FillRule::NonZero, path, Matte8::new(255)),
        (),
        Rgba8p::new(0, 0, 0, 255),
        SrcOver,
    );

    // Render Korean Vertically
    let mut pr = p.raster();
    pr.clear();
    p = Plotter::new(pr);
    p.set_transform(Transform::with_scale(FONT_SIZE, FONT_SIZE));
    let path = font.render(
        korean,
        512.0 / FONT_SIZE,
        font::TextAlign::Vertical
    ).0;
    r.composite_matte(
        (0, 0, 512, 512),
        p.fill(FillRule::NonZero, path, Matte8::new(255)),
        (),
        Rgba8p::new(0, 0, 0, 255),
        SrcOver,
    );

    // Render Japanese Vertically
    let mut pr = p.raster();
    pr.clear();
    p = Plotter::new(pr);
    p.set_transform(Transform::with_scale(FONT_SIZE, FONT_SIZE));
    let path = font.render(
        japanese,
        (512.0 - 32.0 * 7.0) / FONT_SIZE,
        font::TextAlign::Vertical
    ).0;
    r.composite_matte(
        (32, 0, 512, 512),
        p.fill(FillRule::NonZero, path, Matte8::new(255)),
        (),
        Rgba8p::new(0, 0, 0, 255),
        SrcOver,
    );

    // Save PNG
    let raster = Raster::<SRgba8>::with_raster(&r);
    let mut out_data = Vec::new();
    let mut encoder = Encoder::new(&mut out_data).into_step_enc();
    encoder.still(&raster).expect("Failed to add frame");
    std::fs::write("out.png", out_data).expect("Failed to save image");
}