imagescaling

imagescaling is a go lib for clip or scaling image. support for jpg/png/bmp/gif 【chaining operations】

imagescaling 是一个go图片 裁剪&缩放&旋转 库。 支持 jpg/png/bmp/gif 格式， 【链式操作】

1.get

go get github/chi-chu/imagescaling

2.Mode Explain

• CenterClip()  Api example:
    

• CustomClip(x0, y0, x1, y1 uint)  Api example:
    

• ProportionScale(p float64)   Api example:
  when p=0.5
    

• FixScale(height, width uint)   Api example:
  when width=0 height=80
    

• Rotate(RotateMode)   Api example:
    clockwise   only support 90/180/270 degrees
    Rotate90Degrees Rotate180Degrees Rotate270Degrees

• ReSet()   Api Desc:
    Recover the image to original data

• GetExt()   Api Desc:
    Get the file type jpg/png/bmp/gif

3.Usage

import github/chi-chu/imagescaling

func main(){
    imageData, err := os.Open("/your/image/path/filename.jpg")
    if err != nil {
        panic(err)
    }
    defer imageData.Close()
    img, err := imagescaling.New(imageData)
    if err != nil {
        panic(err)
    }
    outPutPath := "/your/output/image/path/filename."+ img.GetExt()
    fd, err := os.OpenFile(outPutPath, os.O_RDWR|os.O_CREATE|os.O_TRUNC, 0777)
    if err != nil {
        panic(err)
    }
    defer fd.Close()
    err = img.CustomClip(100, 23, 400, 300).FixScale(100, 0).Rotate(imagescaling.Rotate90Degrees).Draw(fd)
    if err != nil {
        panic(err)
    }
}