tins2020/img/io.go

package img

import (
	"image"
	"image/png"
	"os"
)

func EncodePNG(path string, im image.Image) error {
	dst, err := os.Create(path)
	if err != nil {
		return err
	}
	defer dst.Close()
	return png.Encode(dst, im)
}

func DecodeImage(path string) (image.Image, error) {
	f, err := os.Open(path)
	if err != nil {
		return nil, err
	}
	defer f.Close()
	im, _, err := image.Decode(f)
	if err != nil {
		return nil, err
	}
	return im, nil
}