util

Documentation

Overview

Package util provides various helper functions for the package bild.

Index

• func GrayImageEqual(a, b *image.Gray) bool
• func HSLToRGB(h, s, l float64) color.RGBA
• func HSVToRGB(h, s, v float64) color.RGBA
• func RGBAImageEqual(a, b *image.RGBA) bool
• func RGBASlicesEqual(a, b []color.RGBA) bool
• func RGBAToString(img *image.RGBA) string
• func RGBToHSL(c color.RGBA) (float64, float64, float64)
• func RGBToHSV(c color.RGBA) (h, s, v float64)
• func Rank(c color.RGBA) float64
• func SortRGBA(data []color.RGBA, min, max int)
• type Stack
  • func (s *Stack) Len() int
  • func (s *Stack) Pop() interface{}
  • func (s *Stack) Push(value interface{})

Functions

func GrayImageEqual

func GrayImageEqual(a, b *image.Gray) bool

GrayImageEqual returns true if the parameter images a and b match or false if otherwise.

func HSLToRGB

func HSLToRGB(h, s, l float64) color.RGBA

HSLToRGB converts from HSL to RGB color model. Parameter h is the hue and its range is from 0 to 360 degrees. Parameter s is the saturation and its range is from 0.0 to 1.0. Parameter l is the lightness and its range is from 0.0 to 1.0.

func HSVToRGB

func HSVToRGB(h, s, v float64) color.RGBA

HSVToRGB converts from HSV to RGB color model. Parameter h is the hue and its range is from 0 to 360 degrees. Parameter s is the saturation and its range is from 0.0 to 1.0. Parameter v is the value and its range is from 0.0 to 1.0.

func RGBAImageEqual

func RGBAImageEqual(a, b *image.RGBA) bool

RGBAImageEqual returns true if the parameter images a and b match or false if otherwise.

func RGBASlicesEqual

func RGBASlicesEqual(a, b []color.RGBA) bool

RGBASlicesEqual returns true if the parameter RGBA color slices a and b match or false if otherwise.

func RGBAToString

func RGBAToString(img *image.RGBA) string

RGBAToString returns a string representation of the Hex values contained in an image.RGBA.

func RGBToHSL

func RGBToHSL(c color.RGBA) (float64, float64, float64)

RGBToHSL converts from RGB to HSL color model. Parameter c is the RGBA color and must implement the color.RGBA interface. Returned values h, s and l correspond to the hue, saturation and lightness. The hue is of range 0 to 360 and the saturation and lightness are of range 0.0 to 1.0.

func RGBToHSV

func RGBToHSV(c color.RGBA) (h, s, v float64)

RGBToHSV converts from RGB to HSV color model. Parameter c is the RGBA color and must implement the color.RGBA interface. Returned values h, s and v correspond to the hue, saturation and value. The hue is of range 0 to 360 and the saturation and value are of range 0.0 to 1.0.

func Rank

func Rank(c color.RGBA) float64

Rank a color based on a color perception heuristic.

func SortRGBA

func SortRGBA(data []color.RGBA, min, max int)

SortRGBA sorts a slice of RGBA values. Parameter min and max correspond to the start and end slice indices that determine the range to be sorted.

Types

type Stack

type Stack struct {
	// contains filtered or unexported fields
}

Stack implementation for arbitrary data types with Push(), Pop() and Len() functions

func (*Stack) Len

func (s *Stack) Len() int

Len returns the size of stack

func (*Stack) Pop

func (s *Stack) Pop() interface{}

Pop the most recently pushed value from the stack

func (*Stack) Push

func (s *Stack) Push(value interface{})

Push a new value onto the stack