color

Documentation

Overview

Package gorilla/color provides converters for different color models.

It implements Hex, HSL and HSV models following the interfaces defined in the standard image/color package.

Index

• Variables
• func HSLToRGB(h, s, l float64) (r, g, b uint8)
• func HSVToRGB(h, s, v float64) (r, g, b uint8)
• func HexToRGB(h Hex) (uint8, uint8, uint8)
• func RGBToHSL(r, g, b uint8) (h, s, l float64)
• func RGBToHSV(r, g, b uint8) (h, s, v float64)
• type HSL
  • func (c HSL) RGBA() (uint32, uint32, uint32, uint32)
• type HSV
  • func (c HSV) RGBA() (uint32, uint32, uint32, uint32)
• type Hex
  • func RGBToHex(r, g, b uint8) Hex
  • func (c Hex) RGBA() (uint32, uint32, uint32, uint32)

Variables

var HSLModel = color.ModelFunc(hslModel)

HSLModel converts any Color to a HSL color.

var HSVModel = color.ModelFunc(hsvModel)

HSVModel converts any Color to a HSV color.

var HexModel = color.ModelFunc(hexModel)

HexModel converts any Color to an Hex color.

Functions

func HSLToRGB

func HSLToRGB(h, s, l float64) (r, g, b uint8)

HSLToRGB converts an HSL triple to a RGB triple.

Ported from http://goo.gl/Vg1h9

func HSVToRGB

func HSVToRGB(h, s, v float64) (r, g, b uint8)

HSVToRGB converts an HSV triple to a RGB triple.

Ported from http://goo.gl/Vg1h9

func HexToRGB

func HexToRGB(h Hex) (uint8, uint8, uint8)

HexToRGB converts an Hex string to a RGB triple.

func RGBToHSL

func RGBToHSL(r, g, b uint8) (h, s, l float64)

RGBToHSL converts an RGB triple to a HSL triple.

Ported from http://goo.gl/Vg1h9

func RGBToHSV

func RGBToHSV(r, g, b uint8) (h, s, v float64)

RGBToHSV converts an RGB triple to a HSV triple.

Ported from http://goo.gl/Vg1h9

Types

type HSL

type HSL struct {
	H, S, L float64
}

HSL represents a cylindrical coordinate of points in an RGB color model.

Values are in the range 0 to 1.

func (HSL) RGBA

func (c HSL) RGBA() (uint32, uint32, uint32, uint32)

RGBA returns the alpha-premultiplied red, green, blue and alpha values for the HSL.

type HSV

type HSV struct {
	H, S, V float64
}

HSV represents a cylindrical coordinate of points in an RGB color model.

Values are in the range 0 to 1.

func (HSV) RGBA

func (c HSV) RGBA() (uint32, uint32, uint32, uint32)

RGBA returns the alpha-premultiplied red, green, blue and alpha values for the HSV.

type Hex

type Hex string

Hex represents an RGB color in hexadecimal format.

The length must be 3 or 6 characters, preceded or not by a '#'.

func RGBToHex

func RGBToHex(r, g, b uint8) Hex

RGBToHex converts an RGB triple to an Hex string.

func (Hex) RGBA

func (c Hex) RGBA() (uint32, uint32, uint32, uint32)

RGBA returns the alpha-premultiplied red, green, blue and alpha values for the Hex.