filter

Documentation

Overview

Package filter contains image filter operations and metadata.

Index

• Variables
• type ByBrightness
  • func (a ByBrightness) Len() int
  • func (a ByBrightness) Less(i, j int) bool
  • func (a ByBrightness) Swap(i, j int)
• type ByName
  • func (a ByName) Len() int
  • func (a ByName) Less(i, j int) bool
  • func (a ByName) Swap(i, j int)
• type Filter
• type Func

Variables

var List = make([]*Filter, 0)

List is an array of all Filters.

var Map = make(map[string]*Filter)

Map allows Filter lookup by name.

Types

type ByBrightness

type ByBrightness []color.Color

ByBrightness implements sort.Interface for []color.Color based on value (brightness).

func (ByBrightness) Len

func (a ByBrightness) Len() int

func (ByBrightness) Less

func (a ByBrightness) Less(i, j int) bool

func (ByBrightness) Swap

func (a ByBrightness) Swap(i, j int)

type ByName

type ByName []*Filter

ByName implements sort.Interface for []*Filter based on name.

func (ByName) Len

func (a ByName) Len() int

func (ByName) Less

func (a ByName) Less(i, j int) bool

func (ByName) Swap

func (a ByName) Swap(i, j int)

type Filter

type Filter struct {
	Name, Help string
	Func       Func
}

A Filter is a Func and associated metadata.

type Func

type Func func(*image.RGBA, []string) (*image.RGBA, []string)

A Func takes an image and the current arg stack, and returns a modified image and arg stack.