color

Documentation

Overview

Color utilities.

Index

• Variables
• type ColorRGBA
  • func NewColorRGBA(r, g, b, a float32) ColorRGBA
  • func NewColorRGBAFromArray(color [4]float32) ColorRGBA
  • func NewColorRGBAFromBytes(r, g, b, a uint8) ColorRGBA
  • func NewColorRGBAFromSlice(color []float32) ColorRGBA
  • func NewColorRGBRFromImageColor(c color.Color) ColorRGBA
  • func (c *ColorRGBA) Clamp()
  • func (c *ColorRGBA) Scale(r, g, b, a float32)
  • func (c *ColorRGBA) ToArray() [4]float32
  • func (c *ColorRGBA) ToImageRGBA() color.RGBA

Variables

var (
	COLOR_RED   = NewColorRGBA(1, 0, 0, 1)
	COLOR_GREEN = NewColorRGBA(0, 1, 0, 1)
	COLOR_BLUE  = NewColorRGBA(0, 0, 1, 1)

	COLOR_BLACK = NewColorRGBA(0, 0, 0, 1)
	COLOR_WHITE = NewColorRGBA(1, 1, 1, 1)

	COLOR_YELLOW  = NewColorRGBA(1, 1, 0, 1)
	COLOR_CYAN    = NewColorRGBA(0, 1, 1, 1)
	COLOR_MAGENDA = NewColorRGBA(1, 0, 1, 1)
)

var COLOR_WHEEL_BASIC = []ColorRGBA{
	COLOR_RED, COLOR_GREEN, COLOR_BLUE, COLOR_BLACK, COLOR_WHITE, COLOR_YELLOW, COLOR_CYAN, COLOR_MAGENDA,
}

Types

type ColorRGBA

type ColorRGBA struct {
	R, G, B, A float32
}

Holds red, green, blue, alpha values. Each should be clamped in [0,1]. A=1 is fully opaque.

func NewColorRGBA

func NewColorRGBA(r, g, b, a float32) ColorRGBA

func NewColorRGBAFromArray

func NewColorRGBAFromArray(color [4]float32) ColorRGBA

func NewColorRGBAFromBytes

func NewColorRGBAFromBytes(r, g, b, a uint8) ColorRGBA

func NewColorRGBAFromSlice

func NewColorRGBAFromSlice(color []float32) ColorRGBA

func NewColorRGBRFromImageColor

func NewColorRGBRFromImageColor(c color.Color) ColorRGBA

func (*ColorRGBA) Clamp

func (c *ColorRGBA) Clamp()

Make sure each component is in [0,1]

func (*ColorRGBA) Scale

func (c *ColorRGBA) Scale(r, g, b, a float32)

func (*ColorRGBA) ToArray

func (c *ColorRGBA) ToArray() [4]float32

func (*ColorRGBA) ToImageRGBA

func (c *ColorRGBA) ToImageRGBA() color.RGBA