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https://github.com/satya164/pigment
Color information, conversion and manipulation library
https://github.com/satya164/pigment
Last synced: about 2 months ago
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Color information, conversion and manipulation library
- Host: GitHub
- URL: https://github.com/satya164/pigment
- Owner: satya164
- Created: 2015-04-09T23:00:27.000Z (about 9 years ago)
- Default Branch: master
- Last Pushed: 2017-05-10T10:12:17.000Z (about 7 years ago)
- Last Synced: 2024-04-14T20:28:09.743Z (3 months ago)
- Language: JavaScript
- Homepage:
- Size: 83 KB
- Stars: 10
- Watchers: 4
- Forks: 2
- Open Issues: 0
-
Metadata Files:
- Readme: README.md
Lists
- Colorful - pigment - Color information, conversion and manipulation library (Tools)
README
# Pigment
A color information, conversion and manipulation library with support for various color models!
[](https://travis-ci.org/satya164/pigment)
[](https://coveralls.io/github/satya164/pigment?branch=master)
[](https://david-dm.org/satya164/pigment)
[](http://opensource.org/licenses/mit-license.php)
## Installation
```sh
$ npm install pigment
```
## Usage
To use **pigment** in your projects, you need to require the node module first.
```javascript
var Color = require("pigment");
```
If you don't need all the functionality, you can use the basic package.
```javascript
var Color = require("pigment/basic");
```
The basic package supports the `name`, `rgb`, `hex` and `hsl` color models.
It also includes the following methods for color manipulation,
* `luminance()` - luminance value of the color
* `darkness()` - darkness value of the color
* `negate()` - negative color of the color
* `greyscale()`/`grayscale()` - greyscale color from the color
* `mix(add, weight)` - mix with another color, where `add` is a valid color of any supported models, `weight` (0-1, default: 0.5) is the amount to add
* `fadein(ratio)` - increase alpha value by `ratio` (0-1)
* `fadeout(ratio)` - decrease alpha value by `ratio` (0-1)
* `rotate(degrees)` - rotate the hue by `degrees` (0-360)
* `saturate(ratio)` - increase the saturation by `ratio` (0-1)
* `desaturate(ratio)` - decrease the saturation by `ratio` (0-1)
* `lighten(ratio)` - increase the luma by `ratio` (0-1)
* `darken(ratio)` - decrease the luma by `ratio` (0-1)
The default package supports all the models supported by the basic package as well as the `hsv`, `hwb`, `xyz`, `lab` and `cmyk` color models;
You can use the full package if you want color schemes and color blindness support.
```javascript
var Color = require("pigment/full");
```
To be able to perform any operations on a color, create a new color object. To convert to a specific color model, just prefix the model name by `to`.
```javascript
var c = new Color("#f06860");
/* Get the color in hex, rgb, hsl etc. */
c.tohex(); // #f06860
c.torgb(); // rgb(240, 104, 96)
c.tohsla(); // hsla(3, 83%, 66%, 1)
/* Get luminance or darkness of the color */
c.luminance(); // 0.29270422282503833
c.darkness(); // 0.4362666666666666
/* Perform operations on the color */
c.fadeout(.2).mix("#e9f060", .5).fadein(.1).torgba(); // rgba(236, 186, 96, 0.99)
```
Apart from color conversion and manipulation, **pigment** is also able to parse a chunk of text to find out any colors.
```javascript
var colors = Color.parse("Some roses aren't #ff0000, some violets aren't rgb(0, 0, 255), nobody's wrong, except maybe you!")
for (var i = 0, l = colors.length; i < l; i++) {
console.log(colors[i].tohex()); // #ff0000, #0000ff
}
```
Generating a random color is also easy,
```javascript
Color.random().tohex(); // #a68a4b
```
## Core API
All the functionality in **pigment** is achieved with models. The `addModel` method can be used to add a new color model to **pigment**.
```javascript
Color.addModel(name, model);
```
The model object must consist 3 properties,
1. `match` - A function or a regex which is used to detect if the color is represented in the specific model representation.
2. `format` - A function which formats the color string into model's representation.
3. `convert` - A function which converts the color object into model's representation.
4. `frommodel` - A function which converts the model's representation into an object with `red`, `green` and `blue` properties, and an optional `alpha` property.
5. `tomodel` - A function which converts the color to the model representation.
There is also an optional `init` method which is called when instantiating a color object.
Any dependencies on other color models can be specified with a `depends` property with the model names in an array.
Have a look at the `models` directory in the repository for examples.