Merge branch 'master' of https://github.com/openseadragon/openseadragon

changelog.txt

@@ -13,6 +13,7 @@ OPENSEADRAGON CHANGELOG
 * Added optional zoom in the middle of the image instead of pointer position (#1423)
 * Now supporting square edge tiles that are padded rather than cropped (#1426)
 * Fixed an issue causing the simple image tileSource to sometimes show duplicate copies (#1370)
+* Fixed an issue causing seams to appear in semi-transparent PNG tiled images (#1470)
 
 2.3.1:
 

src/tile.js

@@ -356,10 +356,10 @@ $.Tile.prototype = {
             //clearing only the inside of the rectangle occupied
             //by the png prevents edge flikering
             context.clearRect(
-                position.x + 1,
-                position.y + 1,
-                size.x - 2,
-                size.y - 2
+                position.x,
+                position.y,
+                size.x,
+                size.y
             );
         }