webp

README

webp

Go decoder for WebP Image File Format with support for animated WebP images.

Based on libwebp compiled to WASM and used with wazero runtime (CGo-free).

The library will first try to use a dynamic/shared library (if installed) via purego and will fall back to WASM.

Documentation

Overview

Package webp implements an WEBP image decoder based on libwebp compiled to WASM.

Index

• Variables
• func Decode(r io.Reader) (image.Image, error)
• func DecodeConfig(r io.Reader) (image.Config, error)
• func Dynamic() bool
• type WEBP
  • func DecodeAll(r io.Reader) (*WEBP, error)

Variables

var (
	ErrMemRead  = errors.New("webp: mem read failed")
	ErrMemWrite = errors.New("webp: mem write failed")
	ErrDecode   = errors.New("webp: decode failed")
)

Errors .

Functions

func Decode

func Decode(r io.Reader) (image.Image, error)

Decode reads a WEBP image from r and returns it as an image.Image.

func DecodeConfig

func DecodeConfig(r io.Reader) (image.Config, error)

DecodeConfig returns the color model and dimensions of a WEBP image without decoding the entire image.

func Dynamic

func Dynamic() bool

Dynamic returns true when library is using the dynamic/shared library.

Types

type WEBP

type WEBP struct {
	// Decoded images.
	Image []*image.NRGBA
	// Delay times, one per frame, in milliseconds.
	Delay []int
}

WEBP represents the possibly multiple images stored in a WEBP file.

func DecodeAll

func DecodeAll(r io.Reader) (*WEBP, error)

DecodeAll reads a WEBP image from r and returns the sequential frames and timing information.