From e433863f096fb0fdca2fd6915b7bad4f48869edb Mon Sep 17 00:00:00 2001
From: Ian Gilman <ian@iangilman.com>
Date: Fri, 20 Mar 2015 10:09:33 -0700
Subject: [PATCH] Test for clip feature

---
 src/tiledimage.js          |  8 ++++----
 test/modules/tiledimage.js | 29 +++++++++++++++++++++++++++++
 2 files changed, 33 insertions(+), 4 deletions(-)

diff --git a/src/tiledimage.js b/src/tiledimage.js
index 48e2773b..405989b7 100644
--- a/src/tiledimage.js
+++ b/src/tiledimage.js
@@ -1163,10 +1163,10 @@ function drawTiles( tiledImage, lastDrawn ){
         var box = tiledImage.imageToViewportRectangle(tiledImage._clip, true);
         var topLeft = tiledImage.viewport.pixelFromPoint(box.getTopLeft(), true);
         var size = tiledImage.viewport.deltaPixelsFromPoints(box.getSize(), true);
-        box = new OpenSeadragon.Rect(Math.round(topLeft.x * $.pixelDensityRatio),
-            Math.round(topLeft.y * $.pixelDensityRatio),
-            Math.round(size.x * $.pixelDensityRatio),
-            Math.round(size.y * $.pixelDensityRatio));
+        box = new OpenSeadragon.Rect(topLeft.x * $.pixelDensityRatio,
+            topLeft.y * $.pixelDensityRatio,
+            size.x * $.pixelDensityRatio,
+            size.y * $.pixelDensityRatio);
         tiledImage._drawer.setClip(box);
         usedClip = true;
     }
diff --git a/test/modules/tiledimage.js b/test/modules/tiledimage.js
index 44dc9327..704f4773 100644
--- a/test/modules/tiledimage.js
+++ b/test/modules/tiledimage.js
@@ -191,4 +191,33 @@
         viewer.open('/test/data/testpattern.dzi');
     });
 
+    // ----------
+    asyncTest('clip', function() {
+        var clip = new OpenSeadragon.Rect(100, 100, 800, 800);
+
+        viewer.addHandler('open', function() {
+            var image = viewer.world.getItemAt(0);
+            propEqual(image.getClip(), clip, 'image has correct clip');
+
+            image.setClip(null);
+            equal(image.getClip(), null, 'clip is cleared');
+
+            image.setClip(clip);
+            propEqual(image.getClip(), clip, 'clip is set correctly');
+
+            Util.spyOnce(viewer.drawer, 'setClip', function(rect) {
+                ok(true, 'drawer.setClip is called');
+                var pixelRatio = viewer.viewport.getContainerSize().x / image.getContentSize().x;
+                var canvasClip = clip.times(pixelRatio * OpenSeadragon.pixelDensityRatio);
+                propEqual(rect, canvasClip, 'clipping to correct rect');
+                start();
+            });
+        });
+
+        viewer.open({
+            tileSource: '/test/data/testpattern.dzi',
+            clip: clip
+        });
+    });
+
 })();