cc/layers/surface_layer.cc

   1 // Copyright 2014 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/surface_layer.h"
   6
   7 #include "cc/layers/surface_layer_impl.h"
   8 #include "cc/output/swap_promise.h"
   9 #include "cc/trees/layer_tree_host.h"
  10
  11 namespace cc {
  12
  13 class SatisfySwapPromise : public SwapPromise {
  14  public:
  15   SatisfySwapPromise(SurfaceSequence sequence,
  16                      const SurfaceLayer::SatisfyCallback& satisfy_callback)
  17       : sequence_(sequence), satisfy_callback_(satisfy_callback) {}
  18
  19   ~SatisfySwapPromise() override {}
  20
  21  private:
  22   void DidActivate() override {}
  23   void DidSwap(CompositorFrameMetadata* metadata) override {
  24     metadata->satisfies_sequences.push_back(sequence_.sequence);
  25   }
  26
  27   void DidNotSwap(DidNotSwapReason reason) override {
  28     satisfy_callback_.Run(sequence_);
  29   }
  30   int64 TraceId() const override { return 0; }
  31
  32   SurfaceSequence sequence_;
  33   SurfaceLayer::SatisfyCallback satisfy_callback_;
  34
  35   DISALLOW_COPY_AND_ASSIGN(SatisfySwapPromise);
  36 };
  37
  38 scoped_refptr<SurfaceLayer> SurfaceLayer::Create(
  39     const LayerSettings& settings,
  40     const SatisfyCallback& satisfy_callback,
  41     const RequireCallback& require_callback) {
  42   return make_scoped_refptr(
  43       new SurfaceLayer(settings, satisfy_callback, require_callback));
  44 }
  45
  46 SurfaceLayer::SurfaceLayer(const LayerSettings& settings,
  47                            const SatisfyCallback& satisfy_callback,
  48                            const RequireCallback& require_callback)
  49     : Layer(settings),
  50       surface_scale_(1.f),
  51       satisfy_callback_(satisfy_callback),
  52       require_callback_(require_callback) {
  53 }
  54
  55 SurfaceLayer::~SurfaceLayer() {
  56   DCHECK(!layer_tree_host());
  57   DCHECK(destroy_sequence_.is_null());
  58 }
  59
  60 void SurfaceLayer::SetSurfaceId(SurfaceId surface_id,
  61                                 float scale,
  62                                 const gfx::Size& size) {
  63   SatisfyDestroySequence();
  64   surface_id_ = surface_id;
  65   surface_size_ = size;
  66   surface_scale_ = scale;
  67   CreateNewDestroySequence();
  68
  69   UpdateDrawsContent(HasDrawableContent());
  70   SetNeedsPushProperties();
  71 }
  72
  73 scoped_ptr<LayerImpl> SurfaceLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
  74   return SurfaceLayerImpl::Create(tree_impl, id());
  75 }
  76
  77 bool SurfaceLayer::HasDrawableContent() const {
  78   return !surface_id_.is_null() && Layer::HasDrawableContent();
  79 }
  80
  81 void SurfaceLayer::SetLayerTreeHost(LayerTreeHost* host) {
  82   if (layer_tree_host() == host) {
  83     Layer::SetLayerTreeHost(host);
  84     return;
  85   }
  86
  87   SatisfyDestroySequence();
  88   Layer::SetLayerTreeHost(host);
  89   CreateNewDestroySequence();
  90 }
  91
  92 void SurfaceLayer::PushPropertiesTo(LayerImpl* layer) {
  93   Layer::PushPropertiesTo(layer);
  94   SurfaceLayerImpl* layer_impl = static_cast<SurfaceLayerImpl*>(layer);
  95
  96   layer_impl->SetSurfaceId(surface_id_);
  97 }
  98
  99 void SurfaceLayer::CalculateContentsScale(float ideal_contents_scale,
 100                                           float* contents_scale_x,
 101                                           float* contents_scale_y,
 102                                           gfx::Size* content_bounds) {
 103   *content_bounds = surface_size_;
 104   *contents_scale_x = surface_scale_;
 105   *contents_scale_y = surface_scale_;
 106 }
 107
 108 void SurfaceLayer::CreateNewDestroySequence() {
 109   DCHECK(destroy_sequence_.is_null());
 110   if (layer_tree_host()) {
 111     destroy_sequence_ = layer_tree_host()->CreateSurfaceSequence();
 112     require_callback_.Run(surface_id_, destroy_sequence_);
 113   }
 114 }
 115
 116 void SurfaceLayer::SatisfyDestroySequence() {
 117   if (!layer_tree_host())
 118     return;
 119   DCHECK(!destroy_sequence_.is_null());
 120   scoped_ptr<SatisfySwapPromise> satisfy(
 121       new SatisfySwapPromise(destroy_sequence_, satisfy_callback_));
 122   layer_tree_host()->QueueSwapPromise(satisfy.Pass());
 123   destroy_sequence_ = SurfaceSequence();
 124 }
 125
 126 }  // namespace cc