neko/internal/utils/cursor.go

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2021-01-10 11:01:18 +13:00
package utils
import (
"bytes"
"image"
"image/color"
"image/png"
"encoding/base64"
"demodesk/neko/internal/types"
)
func GetCursorImageURI(cursor *types.CursorImage) (string, error) {
width := int(cursor.Width)
height := int(cursor.Height)
pixels := cursor.Pixels
img := image.NewRGBA(image.Rect(0, 0, width, height))
for row := 0; row < height; row++ {
for col := 0; col < width; col++ {
pos := ((row * height) + col) * 8
img.SetRGBA(col, row, color.RGBA{
A: pixels[pos+3],
R: pixels[pos+2],
G: pixels[pos+1],
B: pixels[pos+0],
})
}
}
out := new(bytes.Buffer)
err := png.Encode(out, img)
if err != nil {
return "", err
}
uri := "data:image/png;base64," + base64.StdEncoding.EncodeToString(out.Bytes())
return uri, nil
}