SPv2: Add support for tracking raster paint invalidations in testing.

third_party/WebKit/Source/platform/graphics/paint/RasterInvalidationTracking.cpp

Index: third_party/WebKit/Source/platform/graphics/paint/RasterInvalidationTracking.cpp
diff --git a/third_party/WebKit/Source/platform/graphics/paint/RasterInvalidationTracking.cpp b/third_party/WebKit/Source/platform/graphics/paint/RasterInvalidationTracking.cpp
new file mode 100644
index 0000000000000000000000000000000000000000..80a55f446dbcc7e9cdb6020a1990aa230cb4d20e
--- /dev/null
+++ b/third_party/WebKit/Source/platform/graphics/paint/RasterInvalidationTracking.cpp
@@ -0,0 +1,86 @@
+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#include "platform/graphics/paint/RasterInvalidationTracking.h"
+
+#include "platform/geometry/LayoutRect.h"
+#include "platform/graphics/Color.h"
+
+namespace blink {
+
+static bool compareRasterInvalidationInfo(const RasterInvalidationInfo& a,
+                                          const RasterInvalidationInfo& b) {
+  // Sort by rect first, bigger rects before smaller ones.
+  if (a.rect.width() != b.rect.width())
+    return a.rect.width() > b.rect.width();
+  if (a.rect.height() != b.rect.height())
+    return a.rect.height() > b.rect.height();
+  if (a.rect.x() != b.rect.x())
+    return a.rect.x() > b.rect.x();
+  if (a.rect.y() != b.rect.y())
+    return a.rect.y() > b.rect.y();
+
+  // Then compare clientDebugName, in alphabetic order.
+  int nameCompareResult =
+      codePointCompare(a.clientDebugName, b.clientDebugName);
+  if (nameCompareResult != 0)
+    return nameCompareResult < 0;
+
+  return a.reason < b.reason;
+}
+
+template <typename T>
+static std::unique_ptr<JSONArray> rectAsJSONArray(const T& rect) {
+  std::unique_ptr<JSONArray> array = JSONArray::create();
+  array->pushDouble(rect.x());
+  array->pushDouble(rect.y());
+  array->pushDouble(rect.width());
+  array->pushDouble(rect.height());
+  return array;
+}
+
+void RasterInvalidationTracking::asJSON(JSONObject* json) {
+  if (!trackedRasterInvalidations.isEmpty()) {
+    std::sort(trackedRasterInvalidations.begin(),
+              trackedRasterInvalidations.end(), &compareRasterInvalidationInfo);
+    std::unique_ptr<JSONArray> paintInvalidationsJSON = JSONArray::create();
+    for (auto& info : trackedRasterInvalidations) {
+      std::unique_ptr<JSONObject> infoJSON = JSONObject::create();
+      infoJSON->setString("object", info.clientDebugName);
+      if (!info.rect.isEmpty()) {
+        if (info.rect == LayoutRect::infiniteIntRect())
+          infoJSON->setString("rect", "infinite");
+        else
+          infoJSON->setArray("rect", rectAsJSONArray(info.rect));
+      }
+      infoJSON->setString("reason",
+                          paintInvalidationReasonToString(info.reason));
+      paintInvalidationsJSON->pushObject(std::move(infoJSON));
+    }
+    json->setArray("paintInvalidations", std::move(paintInvalidationsJSON));
+  }
+
+  if (!underPaintInvalidations.isEmpty()) {
+    std::unique_ptr<JSONArray> underPaintInvalidationsJSON =
+        JSONArray::create();
+    for (auto& underPaintInvalidation : underPaintInvalidations) {
+      std::unique_ptr<JSONObject> underPaintInvalidationJSON =
+          JSONObject::create();
+      underPaintInvalidationJSON->setDouble("x", underPaintInvalidation.x);
+      underPaintInvalidationJSON->setDouble("y", underPaintInvalidation.y);
+      underPaintInvalidationJSON->setString(
+          "oldPixel",
+          Color(underPaintInvalidation.oldPixel).nameForLayoutTreeAsText());
+      underPaintInvalidationJSON->setString(
+          "newPixel",
+          Color(underPaintInvalidation.newPixel).nameForLayoutTreeAsText());
+      underPaintInvalidationsJSON->pushObject(
+          std::move(underPaintInvalidationJSON));
+    }
+    json->setArray("underPaintInvalidations",
+                   std::move(underPaintInvalidationsJSON));
+  }
+}
+
+}  // namespace blink