1 files changed, 141 insertions, 0 deletions
diff --git a/cc/trees/occlusion_tracker_perftest.cc b/cc/trees/occlusion_tracker_perftest.cc
new file mode 100644
index 0000000..32b85a4
--- /dev/null
+++ b/cc/trees/occlusion_tracker_perftest.cc
@@ -0,0 +1,141 @@
+// Copyright 2014 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 "cc/trees/occlusion_tracker.h"
+
+#include "base/time/time.h"
+#include "cc/layers/layer_iterator.h"
+#include "cc/layers/solid_color_layer_impl.h"
+#include "cc/test/fake_layer_tree_host_impl_client.h"
+#include "cc/test/fake_output_surface.h"
+#include "cc/test/fake_proxy.h"
+#include "cc/test/fake_rendering_stats_instrumentation.h"
+#include "cc/test/lap_timer.h"
+#include "cc/trees/layer_tree_host_impl.h"
+#include "cc/trees/layer_tree_impl.h"
+#include "testing/gtest/include/gtest/gtest.h"
+#include "testing/perf/perf_test.h"
+
+namespace cc {
+namespace {
+
+static const int kTimeLimitMillis = 2000;
+static const int kWarmupRuns = 5;
+static const int kTimeCheckInterval = 10;
+
+class OcclusionTrackerPerfTest : public testing::Test {
+ public:
+  OcclusionTrackerPerfTest()
+      : timer_(kWarmupRuns,
+               base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
+               kTimeCheckInterval) {}
+  void CreateHost() {
+    LayerTreeSettings settings;
+    host_impl_ = LayerTreeHostImpl::Create(
+        settings, &client_, &proxy_, &stats_, NULL, 1);
+    host_impl_->InitializeRenderer(
+        FakeOutputSurface::Create3d().PassAs<OutputSurface>());
+
+    scoped_ptr<LayerImpl> root_layer = LayerImpl::Create(active_tree(), 1);
+    active_tree()->SetRootLayer(root_layer.Pass());
+  }
+
+  LayerTreeImpl* active_tree() { return host_impl_->active_tree(); }
+
+  void SetTestName(const std::string& name) { test_name_ = name; }
+
+  void PrintResults() {
+    CHECK(!test_name_.empty()) << "Must SetTestName() before AfterTest().";
+    perf_test::PrintResult("occlusion_tracker_time",
+                           "",
+                           test_name_,
+                           1000 * timer_.MsPerLap(),
+                           "us",
+                           true);
+  }
+
+ protected:
+  LapTimer timer_;
+  std::string test_name_;
+  FakeLayerTreeHostImplClient client_;
+  FakeProxy proxy_;
+  FakeRenderingStatsInstrumentation stats_;
+  scoped_ptr<LayerTreeHostImpl> host_impl_;
+};
+
+// Simulates a page with several large, transformed and animated layers.
+TEST_F(OcclusionTrackerPerfTest, UnoccludedContentRect_FullyOccluded) {
+  SetTestName("unoccluded_content_rect_fully_occluded");
+
+  gfx::Rect viewport_rect(768, 1038);
+  OcclusionTrackerBase<LayerImpl, LayerImpl::RenderSurfaceType> tracker(
+      viewport_rect, false);
+
+  CreateHost();
+  host_impl_->SetViewportSize(viewport_rect.size());
+
+  scoped_ptr<SolidColorLayerImpl> opaque_layer =
+      SolidColorLayerImpl::Create(active_tree(), 2);
+  opaque_layer->SetBackgroundColor(SK_ColorRED);
+  opaque_layer->SetContentsOpaque(true);
+  opaque_layer->SetDrawsContent(true);
+  opaque_layer->SetBounds(viewport_rect.size());
+  opaque_layer->SetContentBounds(viewport_rect.size());
+  active_tree()->root_layer()->AddChild(opaque_layer.PassAs<LayerImpl>());
+
+  active_tree()->UpdateDrawProperties();
+  const LayerImplList& rsll = active_tree()->RenderSurfaceLayerList();
+  ASSERT_EQ(1u, rsll.size());
+  EXPECT_EQ(1u, rsll[0]->render_surface()->layer_list().size());
+
+  typedef LayerIterator<LayerImpl,
+                        LayerImpl::LayerListType,
+                        LayerImpl::RenderSurfaceType,
+                        LayerIteratorActions::FrontToBack> IteratorType;
+  IteratorType begin = IteratorType::Begin(&rsll);
+  IteratorType end = IteratorType::End(&rsll);
+
+  LayerIteratorPosition<LayerImpl> pos = begin;
+
+  // The opaque_layer adds occlusion over the whole viewport.
+  tracker.EnterLayer(pos);
+  tracker.LeaveLayer(pos);
+
+  gfx::Transform transform_to_target;
+  transform_to_target.Translate(0, 96);
+  bool impl_draw_transform_is_unknown = false;
+
+  do {
+    for (int x = 0; x < viewport_rect.width(); x += 256) {
+      for (int y = 0; y < viewport_rect.height(); y += 256) {
+        gfx::Rect query_content_rect(x, y, 256, 256);
+        gfx::Rect unoccluded =
+            tracker.UnoccludedContentRect(pos.target_render_surface_layer,
+                                          query_content_rect,
+                                          transform_to_target,
+                                          impl_draw_transform_is_unknown);
+        // Sanity test that we're not hitting early outs.
+        bool expect_empty =
+            query_content_rect.right() <= viewport_rect.width() &&
+            query_content_rect.bottom() + 96 <= viewport_rect.height();
+        CHECK_EQ(expect_empty, unoccluded.IsEmpty())
+            << query_content_rect.ToString();
+      }
+    }
+
+    timer_.NextLap();
+  } while (!timer_.HasTimeLimitExpired());
+
+  ++begin;
+  LayerIteratorPosition<LayerImpl> next = begin;
+  EXPECT_EQ(active_tree()->root_layer(), next.current_layer);
+
+  ++begin;
+  EXPECT_EQ(end, begin);
+
+  PrintResults();
+}
+
+}  // namespace
+}  // namespace cc