1 files changed, 85 insertions, 0 deletions
diff --git a/dom/canvas/test/imagebitmap_bug1239752.js b/dom/canvas/test/imagebitmap_bug1239752.js
new file mode 100644
index 000000000..86e9d6f52
--- /dev/null
+++ b/dom/canvas/test/imagebitmap_bug1239752.js
@@ -0,0 +1,85 @@
+var RGBAValues = [[42,142,23,148],
+                  [234,165,177,91],
+                  [74,228,75,195],
+                  [140,108,73,65],
+                  [25,177,3,201],
+                  [127,104,12,199],
+                  [196,93,240,131],
+                  [250,121,231,189],
+                  [175,131,215,190],
+                  [145,122,166,70],
+                  [18,196,210,162],
+                  [225,1,90,188],
+                  [223,216,182,233],
+                  [115,48,168,56],
+                  [50,206,198,199],
+                  [152,28,70,130],
+                  [176,134,133,51],
+                  [148,46,43,144],
+                  [78,171,141,95],
+                  [24,177,102,110],
+                  [0,27,127,91],
+                  [31,221,41,170],
+                  [85,7,218,146],
+                  [65,30,198,238],
+                  [121,56,123,88],
+                  [246,39,140,146],
+                  [174,195,254,149],
+                  [29,153,92,116],
+                  [17,240,5,111],
+                  [38,162,84,143],
+                  [237,159,201,244],
+                  [93,68,14,246],
+                  [143,142,82,221],
+                  [187,215,243,154],
+                  [24,121,220,53],
+                  [80,153,151,219],
+                  [202,241,250,191]];
+
+function createOneTest(rgbaValue) {
+  return new Promise(function(resolve, reject) {
+    var tolerance = 5;
+    var r = rgbaValue[0];
+    var g = rgbaValue[1];
+    var b = rgbaValue[2];
+    var a = rgbaValue[3];
+    var imageData = new ImageData(new Uint8ClampedArray([r, g, b, a]), 1, 1);
+
+    var newImageData;
+    createImageBitmap(imageData).then(
+      function(imageBitmap) {
+        var context = document.createElement("canvas").getContext("2d");
+        context.drawImage(imageBitmap, 0, 0);
+        newImageData = context.getImageData(0, 0, 1, 1);
+        var newR = newImageData.data[0];
+        var newG = newImageData.data[1];
+        var newB = newImageData.data[2];
+        var newA = newImageData.data[3];
+        var isTheSame = Math.abs(r - newR) <= tolerance &&
+                        Math.abs(g - newG) <= tolerance &&
+                        Math.abs(b - newB) <= tolerance &&
+                        Math.abs(a - newA) <= tolerance;
+        ok(isTheSame, "newImageData(" + newR + "," + newG + "," + newB + "," + newA +
+                      ") should equal to imageData(" + r + "," + g + "," + b + "," + a + ")." +
+                      "Premultiplied Alpha is handled while creating ImageBitmap from ImageData.");
+        if (isTheSame) {
+          resolve();
+        } else {
+          reject();
+        }
+      },
+      function() {
+        reject();
+      }
+    );
+  });
+}
+
+function testBug1239752() {
+  var tests = [];
+  for (var i = 0; i < RGBAValues.length; ++i) {
+    tests.push(createOneTest(RGBAValues[i]));
+  }
+
+  return Promise.all(tests);
+}
+\ No newline at end of file