title: Get all pixel in shape
body: <p>i have 4 shapes in image</p>
  
  <p>i want to get pixels of one shape in list of point</p>
  
  <p>the shapes have same color</p>
  
  <pre><code>List&lt;point&gt; GetAllPixelInShape(point x)
  {
  //imp
  }
  </code></pre>
  
  <p>where x point of this shape</p>