/
image.go
53 lines (43 loc) · 895 Bytes
/
image.go
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// Copyright (c) Marcel Moura
// SPDX-License-Identifier: MIT (see LICENSE)
package image
import (
"image"
"image/draw"
"image/png"
"io"
"log"
"os"
)
func Save(filename string, img image.Image) error {
f, err := os.Create(filename)
if err != nil {
return err
}
defer f.Close()
if err := png.Encode(f, img); err != nil {
f.Close()
return err
}
log.Printf("saved image to %v\n", f.Name())
return nil
}
func Load(filename string) (*image.RGBA, error) {
f, err := os.Open(filename)
if err != nil {
return nil, err
}
defer f.Close()
log.Printf("loaded image from %v\n", f.Name())
return Decode(f)
}
func Decode(r io.Reader) (*image.RGBA, error) {
img, err := png.Decode(r)
if err != nil {
return nil, err
}
b := img.Bounds()
rgba := image.NewRGBA(image.Rect(0, 0, b.Dx(), b.Dy()))
draw.Draw(rgba, rgba.Bounds(), img, b.Min, draw.Src)
return rgba, nil
}