1// Copyright 2012 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/layers/delegated_renderer_layer.h"
6
7#include "cc/layers/delegated_renderer_layer_impl.h"
8#include "cc/output/delegated_frame_data.h"
9#include "cc/quads/render_pass_draw_quad.h"
10#include "cc/trees/layer_tree_host.h"
11
12namespace cc {
13
14scoped_refptr<DelegatedRendererLayer> DelegatedRendererLayer::Create(
15    const scoped_refptr<DelegatedFrameProvider>& frame_provider) {
16  return scoped_refptr<DelegatedRendererLayer>(
17      new DelegatedRendererLayer(frame_provider));
18}
19
20DelegatedRendererLayer::DelegatedRendererLayer(
21    const scoped_refptr<DelegatedFrameProvider>& frame_provider)
22    : Layer(),
23      frame_provider_(frame_provider),
24      should_collect_new_frame_(true),
25      frame_data_(NULL),
26      weak_ptrs_(this) {
27  frame_provider_->AddObserver(this);
28}
29
30DelegatedRendererLayer::~DelegatedRendererLayer() {
31  frame_provider_->RemoveObserver(this);
32}
33
34scoped_ptr<LayerImpl> DelegatedRendererLayer::CreateLayerImpl(
35    LayerTreeImpl* tree_impl) {
36  return DelegatedRendererLayerImpl::Create(
37      tree_impl, layer_id_).PassAs<LayerImpl>();
38}
39
40void DelegatedRendererLayer::SetLayerTreeHost(LayerTreeHost* host) {
41  if (layer_tree_host() == host) {
42    Layer::SetLayerTreeHost(host);
43    return;
44  }
45
46  if (!host) {
47    // The active frame needs to be removed from the active tree and resources
48    // returned before the commit is called complete.
49    // TODO(danakj): Don't need to do this if the last frame commited was empty
50    // or we never commited a frame with resources.
51    SetNextCommitWaitsForActivation();
52  } else {
53    // There is no active frame in the new layer tree host to wait for so no
54    // need to call SetNextCommitWaitsForActivation().
55    should_collect_new_frame_ = true;
56    SetNeedsUpdate();
57  }
58
59  Layer::SetLayerTreeHost(host);
60}
61
62void DelegatedRendererLayer::PushPropertiesTo(LayerImpl* impl) {
63  Layer::PushPropertiesTo(impl);
64
65  DelegatedRendererLayerImpl* delegated_impl =
66      static_cast<DelegatedRendererLayerImpl*>(impl);
67
68  delegated_impl->CreateChildIdIfNeeded(
69      frame_provider_->GetReturnResourcesCallbackForImplThread());
70
71  if (frame_data_)
72    delegated_impl->SetFrameData(frame_data_, frame_damage_);
73  frame_data_ = NULL;
74  frame_damage_ = gfx::RectF();
75}
76
77void DelegatedRendererLayer::ProviderHasNewFrame() {
78  should_collect_new_frame_ = true;
79  SetNeedsUpdate();
80  // The active frame needs to be replaced and resources returned before the
81  // commit is called complete.
82  SetNextCommitWaitsForActivation();
83}
84
85bool DelegatedRendererLayer::Update(ResourceUpdateQueue* queue,
86                                    const OcclusionTracker<Layer>* occlusion) {
87  bool updated = Layer::Update(queue, occlusion);
88  if (!should_collect_new_frame_)
89    return updated;
90
91  frame_data_ =
92      frame_provider_->GetFrameDataAndRefResources(this, &frame_damage_);
93  should_collect_new_frame_ = false;
94
95  SetNeedsPushProperties();
96  return true;
97}
98
99bool DelegatedRendererLayer::HasDelegatedContent() const {
100  return true;
101}
102
103}  // namespace cc
104