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      1 // Copyright 2014 The Chromium Authors. All rights reserved.
      2 // Use of this source code is governed by a BSD-style license that can be
      3 // found in the LICENSE file.
      4 
      5 #include "cc/trees/occlusion_tracker.h"
      6 
      7 #include "base/time/time.h"
      8 #include "cc/debug/lap_timer.h"
      9 #include "cc/layers/layer_iterator.h"
     10 #include "cc/layers/solid_color_layer_impl.h"
     11 #include "cc/test/fake_layer_tree_host_impl_client.h"
     12 #include "cc/test/fake_output_surface.h"
     13 #include "cc/test/fake_proxy.h"
     14 #include "cc/test/fake_rendering_stats_instrumentation.h"
     15 #include "cc/test/test_shared_bitmap_manager.h"
     16 #include "cc/trees/layer_tree_host_impl.h"
     17 #include "cc/trees/layer_tree_impl.h"
     18 #include "cc/trees/single_thread_proxy.h"
     19 #include "testing/gtest/include/gtest/gtest.h"
     20 #include "testing/perf/perf_test.h"
     21 
     22 namespace cc {
     23 namespace {
     24 
     25 static const int kTimeLimitMillis = 2000;
     26 static const int kWarmupRuns = 5;
     27 static const int kTimeCheckInterval = 10;
     28 
     29 class OcclusionTrackerPerfTest : public testing::Test {
     30  public:
     31   OcclusionTrackerPerfTest()
     32       : timer_(kWarmupRuns,
     33                base::TimeDelta::FromMilliseconds(kTimeLimitMillis),
     34                kTimeCheckInterval),
     35         impl_(&proxy_) {}
     36   void CreateHost() {
     37     LayerTreeSettings settings;
     38     shared_bitmap_manager_.reset(new TestSharedBitmapManager());
     39     host_impl_ = LayerTreeHostImpl::Create(
     40         settings, &client_, &proxy_, &stats_, shared_bitmap_manager_.get(), 1);
     41     host_impl_->InitializeRenderer(
     42         FakeOutputSurface::Create3d().PassAs<OutputSurface>());
     43 
     44     scoped_ptr<LayerImpl> root_layer = LayerImpl::Create(active_tree(), 1);
     45     active_tree()->SetRootLayer(root_layer.Pass());
     46   }
     47 
     48   LayerTreeImpl* active_tree() { return host_impl_->active_tree(); }
     49 
     50   void SetTestName(const std::string& name) { test_name_ = name; }
     51 
     52   void PrintResults() {
     53     CHECK(!test_name_.empty()) << "Must SetTestName() before AfterTest().";
     54     perf_test::PrintResult("occlusion_tracker_time",
     55                            "",
     56                            test_name_,
     57                            1000 * timer_.MsPerLap(),
     58                            "us",
     59                            true);
     60   }
     61 
     62  protected:
     63   LapTimer timer_;
     64   std::string test_name_;
     65   FakeLayerTreeHostImplClient client_;
     66   FakeProxy proxy_;
     67   DebugScopedSetImplThread impl_;
     68   FakeRenderingStatsInstrumentation stats_;
     69   scoped_ptr<SharedBitmapManager> shared_bitmap_manager_;
     70   scoped_ptr<LayerTreeHostImpl> host_impl_;
     71 };
     72 
     73 TEST_F(OcclusionTrackerPerfTest, UnoccludedContentRect_FullyOccluded) {
     74   SetTestName("unoccluded_content_rect_fully_occluded");
     75 
     76   gfx::Rect viewport_rect(768, 1038);
     77   OcclusionTracker<LayerImpl> tracker(viewport_rect);
     78 
     79   CreateHost();
     80   host_impl_->SetViewportSize(viewport_rect.size());
     81 
     82   scoped_ptr<SolidColorLayerImpl> opaque_layer =
     83       SolidColorLayerImpl::Create(active_tree(), 2);
     84   opaque_layer->SetBackgroundColor(SK_ColorRED);
     85   opaque_layer->SetContentsOpaque(true);
     86   opaque_layer->SetDrawsContent(true);
     87   opaque_layer->SetBounds(viewport_rect.size());
     88   opaque_layer->SetContentBounds(viewport_rect.size());
     89   active_tree()->root_layer()->AddChild(opaque_layer.PassAs<LayerImpl>());
     90 
     91   active_tree()->UpdateDrawProperties();
     92   const LayerImplList& rsll = active_tree()->RenderSurfaceLayerList();
     93   ASSERT_EQ(1u, rsll.size());
     94   EXPECT_EQ(1u, rsll[0]->render_surface()->layer_list().size());
     95 
     96   LayerIterator<LayerImpl> begin = LayerIterator<LayerImpl>::Begin(&rsll);
     97   LayerIterator<LayerImpl> end = LayerIterator<LayerImpl>::End(&rsll);
     98 
     99   LayerIteratorPosition<LayerImpl> pos = begin;
    100 
    101   // The opaque_layer adds occlusion over the whole viewport.
    102   tracker.EnterLayer(pos);
    103   tracker.LeaveLayer(pos);
    104 
    105   gfx::Transform transform_to_target;
    106   transform_to_target.Translate(0, 96);
    107 
    108   do {
    109     Occlusion occlusion =
    110         tracker.GetCurrentOcclusionForLayer(transform_to_target);
    111     for (int x = 0; x < viewport_rect.width(); x += 256) {
    112       for (int y = 0; y < viewport_rect.height(); y += 256) {
    113         gfx::Rect query_content_rect(x, y, 256, 256);
    114         gfx::Rect unoccluded =
    115             occlusion.GetUnoccludedContentRect(query_content_rect);
    116         // Sanity test that we're not hitting early outs.
    117         bool expect_empty =
    118             query_content_rect.right() <= viewport_rect.width() &&
    119             query_content_rect.bottom() + 96 <= viewport_rect.height();
    120         CHECK_EQ(expect_empty, unoccluded.IsEmpty())
    121             << query_content_rect.ToString();
    122       }
    123     }
    124 
    125     timer_.NextLap();
    126   } while (!timer_.HasTimeLimitExpired());
    127 
    128   ++begin;
    129   LayerIteratorPosition<LayerImpl> next = begin;
    130   EXPECT_EQ(active_tree()->root_layer(), next.current_layer);
    131 
    132   ++begin;
    133   EXPECT_EQ(end, begin);
    134 
    135   PrintResults();
    136 }
    137 
    138 TEST_F(OcclusionTrackerPerfTest, UnoccludedContentRect_10OpaqueLayers) {
    139   static const int kNumOpaqueLayers = 10;
    140   SetTestName("unoccluded_content_rect_10_opaque_layers");
    141 
    142   gfx::Rect viewport_rect(768, 1038);
    143   OcclusionTracker<LayerImpl> tracker(viewport_rect);
    144 
    145   CreateHost();
    146   host_impl_->SetViewportSize(viewport_rect.size());
    147 
    148   for (int i = 0; i < kNumOpaqueLayers; ++i) {
    149     scoped_ptr<SolidColorLayerImpl> opaque_layer =
    150         SolidColorLayerImpl::Create(active_tree(), 2 + i);
    151     opaque_layer->SetBackgroundColor(SK_ColorRED);
    152     opaque_layer->SetContentsOpaque(true);
    153     opaque_layer->SetDrawsContent(true);
    154     opaque_layer->SetBounds(
    155         gfx::Size(viewport_rect.width() / 2, viewport_rect.height() / 2));
    156     opaque_layer->SetContentBounds(
    157         gfx::Size(viewport_rect.width() / 2, viewport_rect.height() / 2));
    158     opaque_layer->SetPosition(gfx::Point(i, i));
    159     active_tree()->root_layer()->AddChild(opaque_layer.PassAs<LayerImpl>());
    160   }
    161 
    162   active_tree()->UpdateDrawProperties();
    163   const LayerImplList& rsll = active_tree()->RenderSurfaceLayerList();
    164   ASSERT_EQ(1u, rsll.size());
    165   EXPECT_EQ(static_cast<size_t>(kNumOpaqueLayers),
    166             rsll[0]->render_surface()->layer_list().size());
    167 
    168   LayerIterator<LayerImpl> begin = LayerIterator<LayerImpl>::Begin(&rsll);
    169   LayerIterator<LayerImpl> end = LayerIterator<LayerImpl>::End(&rsll);
    170 
    171   // The opaque_layers add occlusion.
    172   for (int i = 0; i < kNumOpaqueLayers - 1; ++i) {
    173     LayerIteratorPosition<LayerImpl> pos = begin;
    174     tracker.EnterLayer(pos);
    175     tracker.LeaveLayer(pos);
    176     ++begin;
    177   }
    178   LayerIteratorPosition<LayerImpl> pos = begin;
    179   tracker.EnterLayer(pos);
    180   tracker.LeaveLayer(pos);
    181 
    182   gfx::Transform transform_to_target;
    183   transform_to_target.Translate(0, 96);
    184 
    185   do {
    186     Occlusion occlusion =
    187         tracker.GetCurrentOcclusionForLayer(transform_to_target);
    188     for (int x = 0; x < viewport_rect.width(); x += 256) {
    189       for (int y = 0; y < viewport_rect.height(); y += 256) {
    190         gfx::Rect query_content_rect(x, y, 256, 256);
    191         gfx::Rect unoccluded =
    192             occlusion.GetUnoccludedContentRect(query_content_rect);
    193       }
    194     }
    195 
    196     timer_.NextLap();
    197   } while (!timer_.HasTimeLimitExpired());
    198 
    199   ++begin;
    200   LayerIteratorPosition<LayerImpl> next = begin;
    201   EXPECT_EQ(active_tree()->root_layer(), next.current_layer);
    202 
    203   ++begin;
    204   EXPECT_EQ(end, begin);
    205 
    206   PrintResults();
    207 }
    208 
    209 }  // namespace
    210 }  // namespace cc
    211