src/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_(NULL),
  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(
  37       tree_impl, layer_id_).PassAs<LayerImpl>();
  38 }
  39
  40 void 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
  62 void 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
  77 void 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
  85 bool 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
  99 bool DelegatedRendererLayer::HasDelegatedContent() const {
 100   return true;
 101 }
 102
 103 }  // namespace cc