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/blocking_task_runner.h"
  11 #include "cc/trees/layer_tree_host.h"
  12
  13 namespace cc {
  14
  15 scoped_refptr<DelegatedRendererLayer> DelegatedRendererLayer::Create(
  16     const scoped_refptr<DelegatedFrameProvider>& frame_provider) {
  17   return scoped_refptr<DelegatedRendererLayer>(
  18       new DelegatedRendererLayer(frame_provider));
  19 }
  20
  21 DelegatedRendererLayer::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
  32 DelegatedRendererLayer::~DelegatedRendererLayer() {
  33   frame_provider_->RemoveObserver(this);
  34 }
  35
  36 scoped_ptr<LayerImpl> DelegatedRendererLayer::CreateLayerImpl(
  37     LayerTreeImpl* tree_impl) {
  38   return DelegatedRendererLayerImpl::Create(
  39       tree_impl, layer_id_).PassAs<LayerImpl>();
  40 }
  41
  42 void 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
  64 void 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
  81 void 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
  89 void DelegatedRendererLayer::SetDisplaySize(const gfx::Size& size) {
  90   if (display_size_ == size)
  91     return;
  92   display_size_ = size;
  93   SetNeedsCommit();
  94 }
  95
  96 bool 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