func (prc *RotateProcessor) getFilter(rot float32, params imageserver.Params) (gift.Filter, error) {
switch rot {
case 90:
return gift.Rotate90(), nil
case 180:
return gift.Rotate180(), nil
case 270:
return gift.Rotate270(), nil
}
bkg, err := prc.getBackground(params)
if err != nil {
return nil, err
}
interp, err := prc.getInterpolation(params)
if err != nil {
return nil, err
}
return gift.Rotate(rot, bkg, interp), nil
}
func crop(img_name string, crop_map map[string][]string, current_dir string) {
idx := strings.Index(img_name, ".jpg")
if idx == -1 {
panic("no *.jpg in " + img_name)
}
c := crop_map[img_name[:idx]]
fmt.Println(img_name + " : " + strings.Join(c, ", "))
f_path := current_dir + "/" + img_name
f, _ := os.Open(f_path)
defer f.Close()
img, err := jpeg.Decode(f)
if err != nil {
return
}
/**********
* Crop
**********/
x0, _ := strconv.Atoi(c[0])
y0, _ := strconv.Atoi(c[1])
x1, _ := strconv.Atoi(c[2])
y1, _ := strconv.Atoi(c[3])
g := gift.New(
gift.Crop(image.Rect(x0, y0, x1, y1)),
)
bounds := g.Bounds(img.Bounds())
crop := image.NewRGBA(bounds)
g.Draw(crop, img)
crop_f_path := current_dir + "/crop_" + img_name
out, _ := os.Create(crop_f_path)
defer out.Close()
jpeg.Encode(out, crop, nil)
/**********
* Flip
**********/
g = gift.New(
gift.FlipHorizontal(),
)
dst := image.NewRGBA(g.Bounds(crop.Bounds()))
g.Draw(dst, crop)
flip_f_path := current_dir + "/flip_" + img_name
out, _ = os.Create(flip_f_path)
defer out.Close()
jpeg.Encode(out, dst, nil)
/***********
* Rotate
***********/
g = gift.New(
gift.Rotate90(),
)
dst = image.NewRGBA(g.Bounds(crop.Bounds()))
g.Draw(dst, crop)
rotate_f_path := current_dir + "/rotate90_" + img_name
out, _ = os.Create(rotate_f_path)
defer out.Close()
jpeg.Encode(out, dst, nil)
g = gift.New(
gift.Rotate180(),
)
dst = image.NewRGBA(g.Bounds(crop.Bounds()))
g.Draw(dst, crop)
rotate_f_path = current_dir + "/rotate180_" + img_name
out, _ = os.Create(rotate_f_path)
defer out.Close()
jpeg.Encode(out, dst, nil)
g = gift.New(
gift.Rotate270(),
)
dst = image.NewRGBA(g.Bounds(crop.Bounds()))
g.Draw(dst, crop)
rotate_f_path = current_dir + "/rotate270_" + img_name
out, _ = os.Create(rotate_f_path)
defer out.Close()
jpeg.Encode(out, dst, nil)
}