src/backend_cairo/ext.rs


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// This Source Code Form is subject to the terms of the Mozilla Public
// License, v. 2.0. If a copy of the MPL was not distributed with this
// file, You can obtain one at http://mozilla.org/MPL/2.0/.

// external
use cairo;
use usvg;


pub trait ReCairoContextExt {
    fn set_source_color(&self, color: &usvg::Color, opacity: usvg::Opacity);
    fn reset_source_rgba(&self);
}

impl ReCairoContextExt for cairo::Context {
    fn set_source_color(&self, color: &usvg::Color, opacity: usvg::Opacity) {
        self.set_source_rgba(
            color.red as f64 / 255.0,
            color.green as f64 / 255.0,
            color.blue as f64 / 255.0,
            *opacity,
        );
    }

    fn reset_source_rgba(&self) {
        self.set_source_rgba(0.0, 0.0, 0.0, 0.0);
    }
}