issue.go

package main

import (
	"fmt"
	"image"
	"image/jpeg"
	"os"

	"github.com/nfnt/resize"
	"github.com/oliamb/cutter"
)

func main() {
	rdr, err := os.Open("profile.jpg")
	if err != nil {
		fmt.Printf("open: %v\n", err)
		return
	}

	img, _, err := image.Decode(rdr)
	if err != nil {
		fmt.Printf("decode: %v\n", err)
		return
	}

	wr, err := os.OpenFile("smallprofile.jpg", os.O_WRONLY|os.O_CREATE|os.O_TRUNC, 0644)
	if err != nil {
		fmt.Printf("openfile: %v\n", err)
		return
	}

	img, err = cutter.Crop(img, cutter.Config{
		Width:  760,
		Height: 760,
		Anchor: image.Point{X: 100, Y: 100},
	})
	if err != nil {
		fmt.Printf("crop: %v\n", err)
		return
	}

	img = resize.Resize(380, 380, img, resize.Bicubic)

	err = jpeg.Encode(wr, img, &jpeg.Options{96})
	if err != nil {
		fmt.Printf("jpeg.encode: %v\n", err)
	}
}