decoder

Documentation

Index

• type Decoder
  • func NewDecoder(r io.Reader, options *Options) (d *Decoder, err error)
  • func (d *Decoder) Decode() (image.Image, error)
  • func (d *Decoder) GetFeatures() utils.BitstreamFeatures
• type Options
  • func (o *Options) GetConfig() (*C.WebPDecoderConfig, error)

Types

type Decoder

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

Decoder stores information to decode picture

func NewDecoder

func NewDecoder(r io.Reader, options *Options) (d *Decoder, err error)

NewDecoder return new decoder instance

func (*Decoder) Decode

func (d *Decoder) Decode() (image.Image, error)

Decode picture from reader

func (*Decoder) GetFeatures

func (d *Decoder) GetFeatures() utils.BitstreamFeatures

GetFeatures return information about picture: width, height ...

type Options

type Options struct {
	BypassFiltering        bool
	NoFancyUpsampling      bool
	Crop                   image.Rectangle
	Scale                  image.Rectangle
	UseThreads             bool
	Flip                   bool
	DitheringStrength      int
	AlphaDitheringStrength int
}

Options specifies webp decoding parameters

func (*Options) GetConfig

func (o *Options) GetConfig() (*C.WebPDecoderConfig, error)

GetConfig build WebPDecoderConfig for libwebp