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