func (p *Photo) resize(img image.Image, fn string, w, h int) (image.Image, error) {
bounds := img.Bounds()
if bounds.Dx() >= bounds.Dy() {
h = bounds.Dy() * h / bounds.Dx()
} else {
w = bounds.Dx() * w / bounds.Dy()
}
img = resize.Resize(img, img.Bounds(), w, h)
m, err := os.Create(path.Join(DATA_DIR, UPLOADS, fn))
if err != nil {
Log("Could not create image file")
return nil, err
}
defer m.Close()
// write new image to file
err = jpeg.Encode(m, img, nil)
if err != nil {
Log("Could not encode image file")
return nil, err
}
return img, err
}
func main() {
// open "test.jpg"
flag.Parse()
file, err := os.Open(flag.Arg(0))
if err != nil {
log.Fatal(err)
}
// decode jpeg into image.Image
img, err := jpeg.Decode(file)
if err != nil {
log.Fatal(err)
}
file.Close()
bounds := img.Bounds()
w, h := THUMBNAIL_MAX_WIDTH, THUMBNAIL_MAX_HEIGHT
if bounds.Dx() > bounds.Dy() {
h = bounds.Dy() * h / bounds.Dx()
} else {
w = bounds.Dx() * w / bounds.Dy()
}
img = resize.Resize(img, img.Bounds(), w, h)
out, err := os.Create("test_resized.jpg")
if err != nil {
log.Fatal(err)
}
defer out.Close()
// write new image to file
jpeg.Encode(out, img, nil)
}