cc/trees/layer_tree_host_unittest_picture.cc

   1 // Copyright 2013 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/layer_tree_host.h"
   6
   7 #include "cc/test/fake_content_layer_client.h"
   8 #include "cc/test/fake_picture_layer.h"
   9 #include "cc/test/fake_picture_layer_impl.h"
  10 #include "cc/test/layer_tree_test.h"
  11 #include "cc/trees/layer_tree_impl.h"
  12
  13 namespace cc {
  14 namespace {
  15
  16 // These tests deal with picture layers.
  17 class LayerTreeHostPictureTest : public LayerTreeTest {
  18  protected:
  19   virtual void InitializeSettings(LayerTreeSettings* settings) OVERRIDE {
  20     // PictureLayer can only be used with impl side painting enabled.
  21     settings->impl_side_painting = true;
  22   }
  23 };
  24
  25 class LayerTreeHostPictureTestTwinLayer
  26     : public LayerTreeHostPictureTest {
  27   virtual void SetupTree() OVERRIDE {
  28     LayerTreeHostPictureTest::SetupTree();
  29
  30     scoped_refptr<FakePictureLayer> picture =
  31         FakePictureLayer::Create(&client_);
  32     layer_tree_host()->root_layer()->AddChild(picture);
  33   }
  34
  35   virtual void BeginTest() OVERRIDE {
  36     activates_ = 0;
  37     PostSetNeedsCommitToMainThread();
  38   }
  39
  40   virtual void DidCommit() OVERRIDE {
  41     switch (layer_tree_host()->source_frame_number()) {
  42       case 2:
  43         // Drop the picture layer from the tree.
  44         layer_tree_host()->root_layer()->children()[0]->RemoveFromParent();
  45         break;
  46       case 3:
  47         // Add a new picture layer.
  48         scoped_refptr<FakePictureLayer> picture =
  49             FakePictureLayer::Create(&client_);
  50         layer_tree_host()->root_layer()->AddChild(picture);
  51         break;
  52     }
  53   }
  54
  55   virtual void WillActivateTreeOnThread(LayerTreeHostImpl* impl) OVERRIDE {
  56     LayerImpl* pending_root_impl = impl->pending_tree()->root_layer();
  57     LayerImpl* active_root_impl = impl->active_tree()->root_layer();
  58
  59     if (pending_root_impl->children().empty()) {
  60       EXPECT_EQ(2, activates_);
  61       return;
  62     }
  63
  64     FakePictureLayerImpl* pending_picture_impl =
  65         static_cast<FakePictureLayerImpl*>(pending_root_impl->children()[0]);
  66
  67     if (!active_root_impl) {
  68       EXPECT_EQ(0, activates_);
  69       EXPECT_EQ(NULL, pending_picture_impl->twin_layer());
  70       return;
  71     }
  72
  73     if (active_root_impl->children().empty()) {
  74       EXPECT_EQ(3, activates_);
  75       EXPECT_EQ(NULL, pending_picture_impl->twin_layer());
  76       return;
  77     }
  78
  79     FakePictureLayerImpl* active_picture_impl =
  80         static_cast<FakePictureLayerImpl*>(active_root_impl->children()[0]);
  81
  82     // After the first activation, when we commit again, we'll have a pending
  83     // and active layer. Then we recreate a picture layer in the 4th activate
  84     // and the next commit will have a pending and active twin again.
  85     EXPECT_TRUE(activates_ == 1 || activates_ == 4);
  86
  87     EXPECT_EQ(pending_picture_impl, active_picture_impl->twin_layer());
  88     EXPECT_EQ(active_picture_impl, pending_picture_impl->twin_layer());
  89   }
  90
  91   virtual void DidActivateTreeOnThread(LayerTreeHostImpl* impl) OVERRIDE {
  92     LayerImpl* active_root_impl = impl->active_tree()->root_layer();
  93
  94     if (active_root_impl->children().empty()) {
  95       EXPECT_EQ(2, activates_);
  96     } else {
  97       FakePictureLayerImpl* active_picture_impl =
  98           static_cast<FakePictureLayerImpl*>(active_root_impl->children()[0]);
  99
 100       EXPECT_EQ(NULL, active_picture_impl->twin_layer());
 101     }
 102
 103     ++activates_;
 104     if (activates_ <= 4)
 105       PostSetNeedsCommitToMainThread();
 106     else
 107       EndTest();
 108   }
 109
 110   virtual void AfterTest() OVERRIDE {}
 111
 112   FakeContentLayerClient client_;
 113   int activates_;
 114 };
 115
 116 MULTI_THREAD_TEST_F(LayerTreeHostPictureTestTwinLayer);
 117
 118 }  // namespace
 119 }  // namespace cc