title: openlayers image layer stretch with no blur effect
body: <p>I use an Image Layer to draw some data at specific locations on my web application using gwt-openlayers. Assume the original image is 400x400 pixels. Whem I zoom in the map, the image is stretched. The problem is that the stretch effect is 'blurry'. How can I avoid this blurry effect and instruct openlayers to apply a normal 'raw' stretch on the image? Is there some options somewhere? When I say blurry, I mean this:</p>
  
  <p><img src="https://i.stack.imgur.com/laomY.png" alt="as you can see the center of the image has blended colors while the original image is exactly formed by four sub squares with four different colors"></p>
  
  <p>The image above demonstrate the concept. I have a 400x400 pixels image. The image is formed by 4 sub squares 200x200 pixels each. Top left square is blue, top right is red, bottom left is yellow and bottom right is red. When I draw this image as an image layer in openlayers and I zoom the map, the center of the image gets blurry and the four colors are blended. Is there a way to avoid this blur effect and have a 'raw' stretch? Thanks.</p>
  
  <p>Here's the code (in gwt-openlayers) I use to create the image layer:</p>
  
  <pre><code>org.gwtopenmaps.openlayers.client.layer.ImageOptions imgOptions = new org.gwtopenmaps.openlayers.client.layer.ImageOptions();
  imgOptions.setIsBaseLayer(false);
  imgOptions.setTransitionEffect(TransitionEffect.RESIZE);
  imgOptions.setAlwaysInRange(true);
  imgOptions.setLayerOpacity(0.7);
  imgOptions.setProjection("EPSG:900913");
  
  imgLayer = new org.gwtopenmaps.openlayers.client.layer.Image("my_name",
                      null, bounds, new Size(1, 1), imgOptions);
  map.addLayer(imgLayer);
  </code></pre>