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 SatisfyCallback& satisfy_callback,
  40     const RequireCallback& require_callback) {
  41   return make_scoped_refptr(
  42       new SurfaceLayer(satisfy_callback, require_callback));
  43 }
  44
  45 SurfaceLayer::SurfaceLayer(const SatisfyCallback& satisfy_callback,
  46                            const RequireCallback& require_callback)
  47     : Layer(),
  48       surface_scale_(1.f),
  49       satisfy_callback_(satisfy_callback),
  50       require_callback_(require_callback) {
  51 }
  52
  53 SurfaceLayer::~SurfaceLayer() {
  54   DCHECK(!layer_tree_host());
  55   DCHECK(destroy_sequence_.is_null());
  56 }
  57
  58 void SurfaceLayer::SetSurfaceId(SurfaceId surface_id,
  59                                 float scale,
  60                                 const gfx::Size& size) {
  61   SatisfyDestroySequence();
  62   surface_id_ = surface_id;
  63   surface_size_ = size;
  64   surface_scale_ = scale;
  65   CreateNewDestroySequence();
  66
  67   UpdateDrawsContent(HasDrawableContent());
  68   SetNeedsPushProperties();
  69 }
  70
  71 scoped_ptr<LayerImpl> SurfaceLayer::CreateLayerImpl(LayerTreeImpl* tree_impl) {
  72   return SurfaceLayerImpl::Create(tree_impl, id());
  73 }
  74
  75 bool SurfaceLayer::HasDrawableContent() const {
  76   return !surface_id_.is_null() && Layer::HasDrawableContent();
  77 }
  78
  79 void SurfaceLayer::SetLayerTreeHost(LayerTreeHost* host) {
  80   if (layer_tree_host() == host) {
  81     Layer::SetLayerTreeHost(host);
  82     return;
  83   }
  84
  85   SatisfyDestroySequence();
  86   Layer::SetLayerTreeHost(host);
  87   CreateNewDestroySequence();
  88 }
  89
  90 void SurfaceLayer::PushPropertiesTo(LayerImpl* layer) {
  91   Layer::PushPropertiesTo(layer);
  92   SurfaceLayerImpl* layer_impl = static_cast<SurfaceLayerImpl*>(layer);
  93
  94   layer_impl->SetSurfaceId(surface_id_);
  95 }
  96
  97 void SurfaceLayer::CalculateContentsScale(float ideal_contents_scale,
  98                                           float* contents_scale_x,
  99                                           float* contents_scale_y,
 100                                           gfx::Size* content_bounds) {
 101   *content_bounds = surface_size_;
 102   *contents_scale_x = surface_scale_;
 103   *contents_scale_y = surface_scale_;
 104 }
 105
 106 void SurfaceLayer::CreateNewDestroySequence() {
 107   DCHECK(destroy_sequence_.is_null());
 108   if (layer_tree_host()) {
 109     destroy_sequence_ = layer_tree_host()->CreateSurfaceSequence();
 110     require_callback_.Run(surface_id_, destroy_sequence_);
 111   }
 112 }
 113
 114 void SurfaceLayer::SatisfyDestroySequence() {
 115   if (!layer_tree_host())
 116     return;
 117   DCHECK(!destroy_sequence_.is_null());
 118   scoped_ptr<SatisfySwapPromise> satisfy(
 119       new SatisfySwapPromise(destroy_sequence_, satisfy_callback_));
 120   layer_tree_host()->QueueSwapPromise(satisfy.Pass());
 121   destroy_sequence_ = SurfaceSequence();
 122 }
 123
 124 }  // namespace cc