public Canvas(int width, int height, IGameChip gameChip = null) : base(width, height) { this.gameChip = gameChip; pattern = new Pattern(1, 1); pattern.SetPixel(0, 0, 0); stroke = new Pattern(1, 1); stroke.SetPixel(0, 0, 0); spriteSize = gameChip.SpriteSize(); }