cc/layers/delegated_renderer_layer.cc

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