Operator Script
    
    
        Run the test. No interaction required.
      
   
  
    Pass Criteria
  
  
        The test is passed if:
      
        - the first row show four smiley faces of the same size, each framed by a blue rectangle
 
        - the first image on the left on the second row shows half a smiley face (horizontally offset)
 
        - the second image on the left on the second row shows half a smiley face (vertically offset)
 
        - the third image on the left on the second row shows the upper-lefthand quarter of the smiley face enlarged to fit the blue rectangle
 
        - the rightmost image on the second row shows the upper-lefthand quarter of the smiley face (horizontally and vertically offset)
 
      
   
  
    Test Description
  
  
        This tests the feImage element with a number of different filter primitive subregion values.