package bloob

func (image *Image) DrawTilemap(tilemap *Tilemap, pos Vec2i) {
	tilesize := tilemap.Tileset[0].Size
	for y := 0; y < tilemap.Size.Y; y += 1 {
		for x := 0; x < tilemap.Size.X; x += 1 {
			tpos := Vec2i{X: x, Y: y}
			image.Draw(tilemap.Tileset[tilemap.Get(tpos)], Add(Mul(tpos, tilesize), pos))
		}
	}
}

func (image *Image) MakeTileset(tileSize Vec2i) []*Image {
	tileCount := Div(image.Size, tileSize)
	var tiles []*Image
	for y := 0; y < tileCount.Y; y += 1 {
		for x := 0; x < tileCount.X; x += 1 {
			tile := NewImage(tileSize)
			tile.DrawSub(image, Vec2i{}, Recti{Pos: Vec2i{X: x * tileSize.X, Y: y * tileSize.Y}, Size: tileSize})
			tiles = append(tiles, tile)
		}
	}
	return tiles
}