A simple Rust library for managing RGB colorings. Works with no-std environments as well.

Currently this library is geared toward use in embedded systems, but does contain useful APIs that are more generally useful.

• Fast u8 and u16 math — Cichlid includes functions for scaling, dimming, and brightening single and double byte values. Basic trigonometric functions (sine, cosine) are implemented as well.

• HSV and RGB support — Full control over each color is provided by the HSV and ColorRGB structures. Different means of converting from HSV to ColorRGB are also implemented.

• Axial (Two Point) Color Gradients — Create smooth transitions between any two colors for any number of steps.

• Power Consumption Estimating — Estimating power requirements can be done with structs implementing the PowerEstimator trait.

This Library is still in its infancy, and as such there may be a lack of documentation and vigorous testing.

General Color operations:

use cichlid::{HSV, ColorRGB};

let red = ColorRGB::Red;
let blue = ColorRGB::Blue;
let mut purple = red + blue;
assert_eq!(purple, ColorRGB::new(255, 0, 255));

purple.scale(128); // Scale by half
assert_eq!(purple, ColorRGB::new(128, 0, 128));

purple *= 2;  // Multiple all components by two
assert_eq!(purple, red + blue);

Using HSV (Hue, Saturation, Value) and converting to ColorRGB:

use cichlid::{HSV, ColorRGB};

let red_hsv = HSV::new(0, 255, 255);
let red_rgb = ColorRGB::from(red_hsv);
assert_eq!(red_rgb, ColorRGB::Red);

Creating a gradient is very easy, simply import the trait and call the method:

use cichlid::{HSV, ColorRGB, GradientDirection, prelude::*};
let mut colors = [ColorRGB::Black; 100];

let start = HSV::new(0, 255, 255);
let end = HSV::new(100, 255, 180);
colors.gradient_fill(start, end, GradientDirection::Longest);

Any and all contributions are welcome! Open up a PR to contribute some improvements. Look at the Issues tab to see what needs some help.

Cichlid is distributed under the terms of the MIT license. See LICENSE-MIT for details. Opening a pull requests is assumed to signal agreement with these licensing terms.