// SPDX-License-Identifier: LGPL-3.0-or-later OR MPL-2.0
// This file is a part of `piet-glow`.
//
// `piet-glow` is free software: you can redistribute it and/or modify it under the terms of
// either:
//
// * GNU Lesser General Public License as published by the Free Software Foundation, either
// version 3 of the License, or (at your option) any later version.
// * Mozilla Public License as published by the Mozilla Foundation, version 2.
//
// `piet-glow` is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY;
// without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
// See the GNU Lesser General Public License or the Mozilla Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License and the Mozilla
// Public License along with `piet-glow`. If not, see <https://www.gnu.org/licenses/>.

//! An example with a basic usage of the library.

#[path = "util/setup_context.rs"]
mod util;

use piet::kurbo::{Point, Rect, Vec2};
use piet::{GradientStop, RenderContext as _};

fn main() -> Result<(), Box<dyn std::error::Error>> {
    util::init();
    let mut gradient_brush = None;
    util::with_renderer(move |render_context, width, height| {
        let gradient = gradient_brush.get_or_insert_with(|| {
            let grad = piet::FixedRadialGradient {
                center: Point::new(300.0, 400.0),
                origin_offset: Vec2::new(0.0, 0.0),
                radius: 150.0,
                stops: vec![
                    GradientStop {
                        pos: 0.0,
                        color: piet::Color::LIME,
                    },
                    GradientStop {
                        pos: 0.5,
                        color: piet::Color::MAROON,
                    },
                    GradientStop {
                        pos: 1.0,
                        color: piet::Color::NAVY,
                    },
                ],
            };

            render_context.gradient(grad).unwrap()
        });

        render_context.fill(Rect::new(0.0, 0.0, width as _, height as _), gradient);

        render_context.finish().unwrap();
        render_context.status().unwrap();
    })
}