func CropImage(img image.Image, rect image.Rectangle) (croped image.Image) {
g := gift.New(
gift.Crop(rect),
)
croped_image := image.NewRGBA(g.Bounds(rect))
g.Draw(croped_image, img)
return croped_image
}
func (this *AvatarController) Cut() {
r := this.Request
data := e.Data{Status: 1, Msg: "上传成功"}
r.ParseForm()
x, err := strconv.Atoi(r.FormValue("x"))
y, err := strconv.Atoi(r.FormValue("y"))
x2, err := strconv.Atoi(r.FormValue("x2"))
y2, err := strconv.Atoi(r.FormValue("y2"))
fileName := r.FormValue("fileName")
log.Println(x, y, x2, y2, fileName)
g := gift.New(
gift.Crop(image.Rect(x, y, x2, y2)),
gift.Resize(220, 220, gift.LanczosResampling),
)
log.Println("图片名称" + fileName)
//打开待处理的图片
file, err := os.Open(fileName)
if err != nil {
panic(err)
}
defer file.Close()
m1, err := png.Decode(file)
if err != nil {
panic(err)
}
bounds := m1.Bounds()
dst := image.NewRGBA(g.Bounds(bounds))
g.Draw(dst, m1)
cookie := u.Cookie{HTTP: this.HTTP}
filename := cookie.GetCookie().UserId.Value + ".png"
imgfile, err := os.Create(Avatar_ReDir + filename)
os.Remove(Upload_Dir + filename)
defer imgfile.Close()
err = png.Encode(imgfile, dst)
u.OutputJson(this.ResponseWriter, &data)
}
func (processor *Processor) Execute(src *Image, dst io.Writer, query *Query) {
processor.gift.Empty()
quality := 100
if query.Count() > 0 {
// resize
if query.Has("w") || query.Has("h") {
width := query.GetInt("w")
height := query.GetInt("h")
if width > 0 || height > 0 {
processor.gift.Add(gift.Resize(width, height, gift.LanczosResampling))
}
}
// crop
if query.Has("c") {
c := query.GetIntArray("c")
if len(c) == 4 {
processor.gift.Add(gift.Crop(image.Rect(c[0], c[1], c[2], c[3])))
}
}
// grayscale
if query.Has("grayscale") {
processor.gift.Add(gift.Grayscale())
}
// sepia
if query.Has("sepia") {
sepia := query.GetInt("sepia")
if sepia <= 100 {
processor.gift.Add(gift.Sepia(float32(sepia)))
}
}
// contrast
if query.Has("contrast") {
contrast := query.GetInt("contrast")
processor.gift.Add(gift.Contrast(float32(contrast)))
}
// brightness
if query.Has("brightness") {
brightness := query.GetInt("brightness")
processor.gift.Add(gift.Brightness(float32(brightness)))
}
// saturation
if query.Has("saturation") {
saturation := query.GetInt("saturation")
processor.gift.Add(gift.Saturation(float32(saturation)))
}
// colorize
if query.Has("colorize") {
colorize := query.GetIntArray("colorize")
if len(colorize) == 3 {
processor.gift.Add(gift.Colorize(float32(colorize[0]), float32(colorize[1]), float32(colorize[2])))
}
}
// colorbalance
if query.Has("colorbalance") {
colorbalance := query.GetIntArray("colorbalance")
if len(colorbalance) == 3 {
processor.gift.Add(gift.ColorBalance(float32(colorbalance[0]), float32(colorbalance[1]), float32(colorbalance[2])))
}
}
// quality
if query.Has("q") {
q := query.GetInt("q")
if q > 0 && q < 100 {
quality = q
}
}
// Draw
if len(processor.gift.Filters) > 0 {
rgba := image.NewRGBA(processor.gift.Bounds(src.Object.Bounds()))
processor.gift.Draw(rgba, src.Object)
jpeg.Encode(dst, rgba, &jpeg.Options{Quality: quality})
return
}
}
// default
jpeg.Encode(dst, src.Object, &jpeg.Options{Quality: quality})
}
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)
}