void DrawLine(BufferPainter* bp, int x1, int y1, int x2, int y2, double stroke, Color color) {
  double center_of_line_x = 0;
  double center_of_line_y = 0;
  if(x1 == x2) {
    center_of_line_x = stroke / 2.0;
  }
  if(y1 == y2) {
    center_of_line_y = stroke / 2.0;
  }
  bp->Move(x1 + center_of_line_x, y1 + center_of_line_y).Line(x2 + center_of_line_x, y2 + center_of_line_y).Stroke(stroke, color);
}