delegated_renderer_layer.cc revision 5c02ac1a9c1b504631c0a3d2b6e737b5d738bae1 
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/blocking_task_runner.h"
11#include "cc/trees/layer_tree_host.h"
12
13namespace cc {
14
15scoped_refptr<DelegatedRendererLayer> DelegatedRendererLayer::Create(
16    const scoped_refptr<DelegatedFrameProvider>& frame_provider) {
17  return scoped_refptr<DelegatedRendererLayer>(
18      new DelegatedRendererLayer(frame_provider));
19}
20
21DelegatedRendererLayer::DelegatedRendererLayer(
22    const scoped_refptr<DelegatedFrameProvider>& frame_provider)
23    : Layer(),
24      frame_provider_(frame_provider),
25      should_collect_new_frame_(true),
26      frame_data_(NULL),
27      main_thread_runner_(BlockingTaskRunner::current()),
28      weak_ptrs_(this) {
29  frame_provider_->AddObserver(this);
30}
31
32DelegatedRendererLayer::~DelegatedRendererLayer() {
33  frame_provider_->RemoveObserver(this);
34}
35
36scoped_ptr<LayerImpl> DelegatedRendererLayer::CreateLayerImpl(
37    LayerTreeImpl* tree_impl) {
38  return DelegatedRendererLayerImpl::Create(
39      tree_impl, layer_id_).PassAs<LayerImpl>();
40}
41
42void DelegatedRendererLayer::SetLayerTreeHost(LayerTreeHost* host) {
43  if (layer_tree_host() == host) {
44    Layer::SetLayerTreeHost(host);
45    return;
46  }
47
48  if (!host) {
49    // The active frame needs to be removed from the active tree and resources
50    // returned before the commit is called complete.
51    // TODO(danakj): Don't need to do this if the last frame commited was empty
52    // or we never commited a frame with resources.
53    SetNextCommitWaitsForActivation();
54  } else {
55    // There is no active frame in the new layer tree host to wait for so no
56    // need to call SetNextCommitWaitsForActivation().
57    should_collect_new_frame_ = true;
58    SetNeedsUpdate();
59  }
60
61  Layer::SetLayerTreeHost(host);
62}
63
64void DelegatedRendererLayer::PushPropertiesTo(LayerImpl* impl) {
65  Layer::PushPropertiesTo(impl);
66
67  DelegatedRendererLayerImpl* delegated_impl =
68      static_cast<DelegatedRendererLayerImpl*>(impl);
69
70  delegated_impl->SetDisplaySize(display_size_);
71
72  delegated_impl->CreateChildIdIfNeeded(
73      frame_provider_->GetReturnResourcesCallbackForImplThread());
74
75  if (frame_data_)
76    delegated_impl->SetFrameData(frame_data_, frame_damage_);
77  frame_data_ = NULL;
78  frame_damage_ = gfx::RectF();
79}
80
81void DelegatedRendererLayer::ProviderHasNewFrame() {
82  should_collect_new_frame_ = true;
83  SetNeedsUpdate();
84  // The active frame needs to be replaced and resources returned before the
85  // commit is called complete.
86  SetNextCommitWaitsForActivation();
87}
88
89void DelegatedRendererLayer::SetDisplaySize(const gfx::Size& size) {
90  if (display_size_ == size)
91    return;
92  display_size_ = size;
93  SetNeedsCommit();
94}
95
96bool DelegatedRendererLayer::Update(ResourceUpdateQueue* queue,
97                                    const OcclusionTracker<Layer>* occlusion) {
98  bool updated = Layer::Update(queue, occlusion);
99  if (!should_collect_new_frame_)
100    return updated;
101
102  frame_data_ =
103      frame_provider_->GetFrameDataAndRefResources(this, &frame_damage_);
104  should_collect_new_frame_ = false;
105
106  SetNeedsPushProperties();
107  return true;
108}
109
110}  // namespace cc
111