bracket-color

This crate provides a color system for use in the bracket-terminal system. It is part of the overall bracket-lib system.

Using bracket-color

To obtain bracket-color, include the following in your Cargo.toml file:

[dependencies]
bracket-color = "0.1.0"

RGB

The basic structure is RGB, which represents a color as red/green/blue components. You can construct a color in a number of ways:

• new() provides a black (all zeroes) entry.
• from_f32 takes three floats, from 0.0 to 1.0 as a starting point.
• from_u8 takes there bytes, from 0 to 255.
• named takes a tuple of floats, with a LOT of predefined colors available. (e.g. RGB::named(RED)).
• from_hex takes an HTML/CSS style hex number and converts it (e.g. RGB::from_hex("#aabbcc"))).

You can also convert RGB structures:

• Add, subtract, multiply and divide operations are supported both on a single float and against another RGB structure.
• to_hsv makes a Hue-Saturation-Value color.
• to_greyscale uses a standard grayscale operation to make a greyscale approximation of a color.
• desaturate makes a better greyscale conversion by converting to HSV and lowering the saturation.
• lerp lets you smoothly transition between two colors, in RGB space.

HSV

The HSV system provides color support in the HSV space. You can construct an HSV color as follows:

• new() makes an all-zero HSV color.
• from_f32 lets you specify HSV as floats.
• RGB::to_hsv converts an RGB color into an HSV color.

You can also go back to RGB with to_rgb.

ColorPair

A ColorPair is simply a helper structure holding both a foreground and a background.

Exports

Everything is exported via the bracket_color::prelude namespace.

Feature Flags

• If you enable the serde feature flag, the RGB, HSV and ColorPair structures are derived as Serde serializable/de-serializable.
• The rex feature flag enables RexPaint support.

Examples

There are a few examples to help get you going. They use crossterm for terminal output. You may run the examples with cargo run --example <name>.

• lerp is a simple color lerp.
• lerpit is an iterator-based lerp.
• lerpit_hsv is an HSV lerp.
• named_colors demonstrates how to access named colors.
• shades_of_grey demonstrates greyscale and desaturate functions.
• colors demonstrates various ways to acquire colors.