[−][src]Trait colorsys::ColorAlpha

pub trait ColorAlpha {
    fn get_alpha(&self) -> f64;

    fn set_alpha(&mut self, val: f64);

    fn opacify(&mut self, val: f64);
}

Methods to work with alpha channel in color.

Required methods

fn get_alpha(&self) -> f64

Returns alpha channel. If it not setted will returns 1.0

fn set_alpha(&mut self, val: f64)

Sets alpha channel

use colorsys::{Hsl,ColorAlpha};
let mut hsl = Hsl::default(); // Hsl { a: None, .. }
hsl.set_alpha(0.45); // Hsl { a: 0.45, .. }
hsl.set_alpha(123.015); // Hsl { a: 1.0, .. }
hsl.set_alpha(-123.3); // Hsl { a: 0.0, .. }

fn opacify(&mut self, val: f64)

Increase/decrease color alpha channel with specified value. Value can be negative.

Example

use colorsys::{Hsl,ColorAlpha};
let mut hsl = Hsl::default(); // Hsl { a: None, .. }
hsl.opacify(-0.3); // Hsl { a: 0.7, .. }
hsl.opacify(0.015); // Hsl { a: 0.715, .. }
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Implementors

impl ColorAlpha for Hsl[src]

impl ColorAlpha for Rgb[src]

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