Speed up canvas comparisons in bidi mochitests. No bug

docshell/test/chrome/bug113934_window.xul

@@ -53,7 +53,7 @@
       var s2 = snapshotWindow($("f2").contentWindow);
       var s3 = snapshotWindow($("f3").contentWindow);
 
-      ok(!compareSnapshots(s2, s3)[0],
+      ok(!compareSnapshots(s2, s3, true)[0],
          "Should look different due to different sizing");
 
       function getDOM(id) {
@@ -101,7 +101,7 @@
       l4.detach();
 
       var s1_new = snapshotWindow($("f1").contentWindow);
-      var [same, first, second] = compareSnapshots(s1_new, s2);
+      var [same, first, second] = compareSnapshots(s1_new, s2, true);
       ok(same, "Should reflow on swap", "Expected " + second + " but got " + first);
 
       is(strs["f1"], "f1.pagehide f1.pageshow");

docshell/test/chrome/bug449778_window.xul

@@ -8,8 +8,7 @@
 
   <!-- test code goes here -->
   <script type="application/javascript"><![CDATA[
-    var imports = [ "SimpleTest", "is", "isnot", "ok", "snapshotWindow",
-                    "compareSnapshots", "onerror" ];
+    var imports = [ "SimpleTest", "is", "isnot", "ok", "onerror" ];
     for each (var import in imports) {
       window[import] = window.opener.wrappedJSObject[import];
     }

docshell/test/chrome/bug449780_window.xul

@@ -8,8 +8,7 @@
 
   <!-- test code goes here -->
   <script type="application/javascript"><![CDATA[
-    var imports = [ "SimpleTest", "is", "isnot", "ok", "snapshotWindow",
-                    "compareSnapshots", "onerror" ];
+    var imports = [ "SimpleTest", "is", "isnot", "ok", "onerror" ];
     for each (var import in imports) {
       window[import] = window.opener.wrappedJSObject[import];
     }

layout/base/tests/bidi_numeral_test.js

@@ -2,13 +2,14 @@
 var RemoteCanvas = function(url, id) {
     this.url = url;
     this.id = id;
+    this.snapshot = null;
 };
 
 RemoteCanvas.CANVAS_WIDTH = 200;
 RemoteCanvas.CANVAS_HEIGHT = 100;
 
-RemoteCanvas.prototype.getCanvas = function() {
-  return document.getElementById(this.id + "-canvas");
+RemoteCanvas.prototype.compare = function(otherCanvas, expected) {
+    return compareSnapshots(this.snapshot, otherCanvas.snapshot, expected)[0];
 }
 
 RemoteCanvas.prototype.load = function(callback) {
@@ -19,37 +20,14 @@ RemoteCanvas.prototype.load = function(callback) {
   iframe.src = this.url;
   var me = this;
   iframe.addEventListener("load", function() {
-      window.setTimeout(function() {
-          me.remotePageLoaded(callback);
-        }, 500);
-    }, true);
+      me.remotePageLoaded(callback);
+    }, false);
   window.document.body.appendChild(iframe);
 };
 
 RemoteCanvas.prototype.remotePageLoaded = function(callback) {
-  netscape.security.PrivilegeManager.enablePrivilege('UniversalBrowserRead');
   var ldrFrame = document.getElementById(this.id + "-iframe");
-  var remoteWindow = ldrFrame.contentWindow;
-
-  var canvas = document.createElement("canvas");
-  canvas.id = this.id + "-canvas";
-  canvas.style.width = RemoteCanvas.CANVAS_WIDTH + "px";
-  canvas.style.height = RemoteCanvas.CANVAS_HEIGHT + "px";
-  canvas.width = RemoteCanvas.CANVAS_WIDTH;
-  canvas.height = RemoteCanvas.CANVAS_HEIGHT;
-
-  var ctx = canvas.getContext("2d");
-  ctx.clearRect(0, 0,
-                RemoteCanvas.CANVAS_WIDTH,
-                RemoteCanvas.CANVAS_HEIGHT);
-  ctx.drawWindow(remoteWindow,
-                 0, 0,
-                 RemoteCanvas.CANVAS_WIDTH,
-                 RemoteCanvas.CANVAS_HEIGHT,
-                 "rgb(255,255,255)");
-
-  window.document.body.appendChild(canvas);
-
+  this.snapshot = snapshotWindow(ldrFrame.contentWindow);
   callback(this);
 };
 
@@ -83,13 +61,11 @@ function do_test()
     canvases.push(canvas);
 
     if (canvases.length == 2) { // when both canvases are loaded
-      var img_1 = canvases[0].getCanvas().toDataURL("image/png", "");
-      var img_2 = canvases[1].getCanvas().toDataURL("image/png", "");
       if (passes[currentPass].op == "==") {
-        ok(img_1 == img_2, "Rendering of reftest " + fileprefix + passes[currentPass].file +
+        ok(canvases[0].compare(canvases[1], true), "Rendering of reftest " + fileprefix + passes[currentPass].file +
            " is different with bidi.numeral == " + passes[currentPass].bidiNumeralValue);
       } else if (passes[currentPass].op == "!=") {
-        ok(img_1 != img_2, "Rendering of reftest " + fileprefix + passes[currentPass].file +
+        ok(canvases[0].compare(canvases[1], false), "Rendering of reftest " + fileprefix + passes[currentPass].file +
            " is not different with bidi.numeral == " + passes[currentPass].bidiNumeralValue);
       }
 

layout/base/tests/test_bug441782-1.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=441782
 <head>
   <title>Test for Bug 441782</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug441782-2.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=441782
 <head>
   <title>Test for Bug 441782</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug441782-3.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=441782
 <head>
   <title>Test for Bug 441782</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug441782-4.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=441782
 <head>
   <title>Test for Bug 441782</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug441782-5.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=441782
 <head>
   <title>Test for Bug 441782</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug449781.html

@@ -33,7 +33,7 @@ addLoadEvent(function() {
   s2 = snapshotWindow(window);
 
   var equal, str1, str2;
-  [equal, str1, str2] = compareSnapshots(s1, s2);
+  [equal, str1, str2] = compareSnapshots(s1, s2, true);
   ok(equal, "Show/hide should have no effect",
      "got " + str1 + " but expected " + str2);
 
@@ -49,14 +49,14 @@ addLoadEvent(function() {
   
   s3 = snapshotWindow(window);
 
-  [equal, str1, str2] = compareSnapshots(s1, s3);
+  [equal, str1, str2] = compareSnapshots(s1, s3, true);
   ok(equal, "Zoom should have no effect",
      "got " + str1 + " but expected " + str2);
 
   $("display").style.display = "none";
 
   s4 = snapshotWindow(window);
-  [equal, str1, str2] = compareSnapshots(s3, s4);
+  [equal, str1, str2] = compareSnapshots(s3, s4, true);
   ok(!equal, "Should be able to see the canary");
 
   SimpleTest.finish();

layout/base/tests/test_bug467672-1.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=467672
 <head>
   <title>Test for Bug 467672</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug467672-2.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=467672
 <head>
   <title>Test for Bug 467672</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug467672-3.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=467672
 <head>
   <title>Test for Bug 467672</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug467672-4.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=467672
 <head>
   <title>Test for Bug 467672</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

layout/base/tests/test_bug467672-5.html

@@ -5,7 +5,8 @@ https://bugzilla.mozilla.org/show_bug.cgi?id=467672
 <head>
   <title>Test for Bug 467672</title>
   <script type="text/javascript" src="/MochiKit/MochiKit.js"></script>
-  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>        
+  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+  <script type="text/javascript" src="/tests/SimpleTest/WindowSnapshot.js"></script>
   <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
 </head>
 <body>

testing/mochitest/tests/SimpleTest/WindowSnapshot.js

@@ -24,24 +24,26 @@ function snapshotWindow(win) {
   return el;
 }
 
-// If the two snapshots aren't equal, returns their serializations as data URIs.
-function compareSnapshots(s1, s2) {
+// If the two snapshots don't compare as expected (true for equal, false for
+// unequal), returns their serializations as data URIs.  In all cases, returns
+// whether the comparison was as expected.
+function compareSnapshots(s1, s2, expected) {
   netscape.security.PrivilegeManager.enablePrivilege('UniversalXPConnect');
 
   var s1Str, s2Str;
-  var equal = false;
+  var correct = false;
   if (gWindowUtils) {
-    equal = (gWindowUtils.compareCanvases(s1, s2, {}) == 0);
+    correct = ((gWindowUtils.compareCanvases(s1, s2, {}) == 0) == expected);
   }
 
-  if (!equal) {
+  if (!correct) {
     s1Str = s1.toDataURL();
     s2Str = s2.toDataURL();
 
     if (!gWindowUtils) {
-      equal = (s1Str == s2Str);
+	correct = ((s1Str == s2Str) == expected);
     }
   }
 
-  return [equal, s1Str, s2Str];
+  return [correct, s1Str, s2Str];
 }

toolkit/content/tests/chrome/bug451286_window.xul

@@ -119,7 +119,7 @@
 
       //Take snapshots
       var manualSnapshot = snapshotWindow(gBrowser.contentWindow);
-      var res = compareSnapshots(findSnapshot, manualSnapshot);
+      var res = compareSnapshots(findSnapshot, manualSnapshot, true);
       ok(res[0], "Matches found in iframe correctly highlighted");
       finish();
     }