void DrawSafeArea()
{
// 左上端
float x0 = 0f;
float y0 = (float)Screen.height;
ConvertCoordFromUnityScreen(ref x0, ref y0);
// 左上端
float x1 = (float)Screen.width;
float y1 = 0f;
ConvertCoordFromUnityScreen(ref x1, ref y1);
Renderer.Color = new Color32(255, 0, 0, 64);
Renderer.AddRectangle(x0, y0, (x1 - x0), -y0); // 上
Renderer.AddRectangle(x0, root.Height, (x1 - x0), y1 - root.Height); // 下
Renderer.AddRectangle(x0, 0f, -x0, root.Height); // 左
Renderer.AddRectangle(root.Width, 0f, x1 - root.Width, root.Height); // 右
}
