[OpenLayers-Dev] Fractional Zoom with Grid layers - Artifacts

[James Lamanna]

Hi,
I'm working on an application that requires that there be fractional 
zoom capability for almost all layers.
I've been working with some XYZ layers with fractionalZoom (by setting 
serverResolutions), however, I noticed that there are nasty white 
grid-line artifacts that show up when on non integral zoom levels.

Upon reviewing what is going on, the artifacts are generated as a result 
of scaling the layer <div>. I believe that this approach should be 
changed to scale the tile images, rather than the layer div.

So, transformDiv() would have code in it like this:

transformDiv: function(scale) {
     $(this.div).find('img').css('width',
	function(i,v){ return v * scale; });
     $(this.div).find('img').css('height',
         function(i,v) { return v * scale; });
     $(this.div).find('img').css('left',
         function(i, v) { return v * scale; });
     $(this.div).find('img').css('top',
         function(i, v) { return v * scale; });

....

This appears to remove the tile artifacts.

Thanks.

-- James