• Go语言QQ群: 102319854, 1055927514
• 凹语言(凹读音“Wa”)(The Wa Programming Language): https://github.com/wa-lang/wa

webp

██╗    ██╗███████╗██████╗ ██████╗
██║    ██║██╔════╝██╔══██╗██╔══██╗
██║ █╗ ██║█████╗  ██████╔╝██████╔╝
██║███╗██║██╔══╝  ██╔══██╗██╔═══╝
╚███╔███╔╝███████╗██████╔╝██║
 ╚══╝╚══╝ ╚══════╝╚═════╝ ╚═╝

Benchmark

Install

Install GCC or MinGW (download here) at first, and then run these commands:

1. go get github.com/chai2010/webp
2. go run hello.go

Example

This is a simple example:

package main

import (
    "bytes"
    "fmt"
    "io/ioutil"
    "log"

    "github.com/chai2010/webp"
)

func main() {
    var buf bytes.Buffer
    var width, height int
    var data []byte
    var err error

    // Load file data
    if data, err = ioutil.ReadFile("./testdata/1_webp_ll.webp"); err != nil {
        log.Println(err)
    }

    // GetInfo
    if width, height, _, err = webp.GetInfo(data); err != nil {
        log.Println(err)
    }
    fmt.Printf("width = %d, height = %d\n", width, height)

    // GetMetadata
    if metadata, err := webp.GetMetadata(data, "ICCP"); err != nil {
        fmt.Printf("Metadata: err = %v\n", err)
    } else {
        fmt.Printf("Metadata: %s\n", string(metadata))
    }

    // Decode webp
    m, err := webp.Decode(bytes.NewReader(data))
    if err != nil {
        log.Println(err)
    }

    // Encode lossless webp
    if err = webp.Encode(&buf, m, &webp.Options{Lossless: true}); err != nil {
        log.Println(err)
    }
    if err = ioutil.WriteFile("output.webp", buf.Bytes(), 0666); err != nil {
        log.Println(err)
    }

    fmt.Println("Save output.webp ok")
}

Decode and Encode as RGB format:

m, err := webp.DecodeRGB(data)
if err != nil {
    log.Fatal(err)
}

data, err := webp.EncodeRGB(m)
if err != nil {
    log.Fatal(err)
}

Notes

Change the libwebp to fast method:

internal/libwebp/src/enc/config.c
WebPConfigInitInternal
config->method = 0; // 4;

BUGS

Report bugs to chaishushan@gmail.com.

Thanks!