filter

Documentation

Index

• Variables
• func Init(ctx context.Context, cfg []config.FilterConfig, m map[string]FilterBuilder)
• func ParseDimensions(str string) (int, int, error)
• func ParseModifier(str string, allowed string) (byte, string)
• func ParseRect(str string) (int, int, int, int, error)
• type Chain
  • func Parse(ctx context.Context, m map[string]FilterBuilder, str string) (Chain, error)
  • func (c Chain) Apply(ctx context.Context, i img.Img) (img.Img, error)
• type Filter
• type FilterBuilder
• type Image

Variables

var (
	ErrFilterNotFound         = errors.New("filter not found")
	ErrBadFilterParameter     = errors.New("bad filter parameter")
	ErrMissingFilterParameter = errors.New("missing filter parameter")
)

Functions

func Init

func Init(ctx context.Context, cfg []config.FilterConfig, m map[string]FilterBuilder)

func ParseDimensions

func ParseDimensions(str string) (int, int, error)

func ParseModifier

func ParseModifier(str string, allowed string) (byte, string)

func ParseRect

func ParseRect(str string) (int, int, int, int, error)

Types

type Chain

type Chain []Filter

func Parse

func Parse(ctx context.Context, m map[string]FilterBuilder, str string) (Chain, error)

func (Chain) Apply

func (c Chain) Apply(ctx context.Context, i img.Img) (img.Img, error)

type Filter

type Filter interface {
	Apply(img.Img) (img.Img, error)
}

type FilterBuilder

type FilterBuilder func(parts []string) (Filter, int, error)

type Image

type Image interface{}