title: Custom shape for border radius image in React-Native
body: <p>I want to reproduce that style in my component (the border bottom).
  I am basically loading a rectangular image, then I want to rounded it at the bottom.</p>
  
  <p><a href="https://i.stack.imgur.com/phT2H.png" rel="nofollow noreferrer"><img src="https://i.stack.imgur.com/phT2H.png" alt="enter image description here"></a></p>
  
  <p>I think about :</p>
  
  <ul>
  <li>border-bottom-right-radius and left, but it is not accurate with the custom shape of the screen. </li>
  <li>transform scaleX, but it scale the image proportion (obviously)</li>
  <li>create a white image with the custom shape and load it at the bottom of the screen, but I want to add a shadow at the bottom of the image... With a white image I could not do that...</li>
  </ul>
  
  <p>Is there a way to do that in a proper style with React-Native ?</p>
  
  <p>Thank you !</p>