55 lines
1.1 KiB
Go
55 lines
1.1 KiB
Go
package render
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import (
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"image"
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_ "image/gif" // register gif, jpeg, png format handlers
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_ "image/jpeg"
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"image/png"
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"os"
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"golang.org/x/image/draw"
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)
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func ReadImage(path string) (image.Image, error) {
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reader, err := os.Open(path)
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if err != nil {
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return nil, err
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}
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img, _, err := image.Decode(reader)
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if err != nil {
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return nil, err
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}
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return img, nil
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}
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func WriteImage(path string, img image.Image) error {
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f, err := os.Create(path)
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if err != nil {
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return err
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}
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if err := png.Encode(f, img); err != nil {
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f.Close()
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return err
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}
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return nil
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}
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func ImgToNRGBA(img image.Image) *image.NRGBA {
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b := img.Bounds()
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r := image.NewNRGBA(b)
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for x := b.Min.X; x < b.Max.X; x++ {
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for y := b.Min.Y; y < b.Max.Y; y++ {
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r.Set(x, y, img.At(x, y))
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}
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}
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return r
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}
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func ScaleImage(img image.Image, factor int) (scaled *image.NRGBA) {
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b := img.Bounds()
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scaledBounds := image.Rect(0, 0, b.Max.X*factor, b.Max.Y*factor)
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scaledImg := image.NewNRGBA(scaledBounds)
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draw.NearestNeighbor.Scale(scaledImg, scaledBounds, img, b, draw.Src, nil)
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return scaledImg
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}
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