Golang压缩Jpeg图片和PNG图片
func compressImageResource(data []byte) []byte {
imgSrc, _, err := image.Decode(bytes.NewReader(data))
if err != nil {
return data
}
newImg := image.NewRGBA(imgSrc.Bounds())
draw.Draw(newImg, newImg.Bounds(), &image.Uniform{C: color.White}, image.Point{}, draw.Src)
draw.Draw(newImg, newImg.Bounds(), imgSrc, imgSrc.Bounds().Min, draw.Over)
buf := bytes.Buffer{}
err = jpeg.Encode(&buf, newImg, &jpeg.Options{Quality: 40})
if err != nil {
return data
}
if buf.Len() > len(data) {
return data
}
return buf.Bytes()
}