package storage

import (
	"bytes"
	"image"
	"image/draw"
	"image/png"
	"os"
)

type tile struct {
	dirty bool
	image *image.RGBA
}

func (t *tile) save(path string) error {
	file, err := os.OpenFile(path, os.O_WRONLY, 0644)
	if err != nil {
		return err
	}
	defer file.Close()

	err = png.Encode(file, t.image)
	t.dirty = false
	return err
}

func (t *tile) fill() {
	draw.Draw(t.image, t.image.Bounds(), &image.Uniform{C: image.White}, image.Point{}, draw.Src)
}

func (t *tile) toBytesPNG() (*bytes.Buffer, error) {
	buffer := &bytes.Buffer{}
	err := png.Encode(buffer, t.image)
	return buffer, err
}

func (t *tile) size() image.Point {
	return t.image.Bounds().Size()
}