/
cli.go
68 lines (56 loc) · 1.04 KB
/
cli.go
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package main
import (
"bytes"
"image"
_ "image/jpeg"
_ "image/png"
"io/ioutil"
"log"
"os"
"strconv"
"github.com/cotap/prism"
)
func main() {
if len(os.Args) < 2 {
log.Println("Usage: prism IMAGE WIDTH HEIGHT")
os.Exit(1)
}
width, _ := strconv.Atoi(os.Args[2])
height, _ := strconv.Atoi(os.Args[3])
// load original
name := os.Args[1]
b, err := ioutil.ReadFile(name)
if err != nil {
panic(err)
}
_, format, err := image.DecodeConfig(bytes.NewBuffer(b))
if err != nil {
panic(err)
}
img, err := prism.Decode(bytes.NewBuffer(b))
if err != nil {
panic(err)
}
_ = img.Reorient()
err = img.Fit(width, height)
if err != nil {
panic(err)
}
// write resized
w, _ := os.Create("resized." + format)
defer w.Close()
switch format {
case "png":
err = prism.EncodePNG(w, img, 4)
case "jpg", "jpeg":
err = prism.EncodeJPEG(w, img, 85)
}
if err != nil {
panic(err)
}
// // open preview
// err = exec.Command("open", "-a", "/Applications/Preview.app", w.Name()).Run()
// if err != nil {
// log.Fatal(err)
// }
}