title: canvas text distorted in landscape
body: <p>I have draw following graph using canvas 
  <img src="https://i.stack.imgur.com/faD9d.png" alt="enter image description here"></p>
  
  <p>It works fine in portrait but in landscape text get distorted</p>
  
  <p><img src="https://i.stack.imgur.com/PUT0p.png" alt="enter image description here"></p>
  
  <p>I dont want to scale text size.</p>