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webp
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Benchmark
Install
Install GCC or MinGW (download here) at first, and then run these commands:
go get github.com/chai2010/webpgo 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 [email protected].
Thanks!
