exo: Implement presentation interface.

components/exo/surface.cc

 // Copyright 2015 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #include "components/exo/surface.h"
 
 #include <utility>
 
 #include "base/callback_helpers.h"
 #include "base/logging.h"
@@ skipping 190 matching lines @@
 
 Surface::~Surface() {
   aura::Env::GetInstance()->context_factory()->RemoveObserver(this);
   for (SurfaceObserver& observer : observers_)
     observer.OnSurfaceDestroying(this);
 
   window_->RemoveObserver(this);
   window_->layer()->SetShowSolidColorContent();
 
   frame_callbacks_.splice(frame_callbacks_.end(), pending_frame_callbacks_);
-  compositor_frame_sink_holder_->ActivateFrameCallbacks(&frame_callbacks_);
-  compositor_frame_sink_holder_->CancelFrameCallbacks();
+  active_frame_callbacks_.splice(active_frame_callbacks_.end(),
+                                 frame_callbacks_);
+  // Call all frame callbacks with a null frame time to indicate that they
+  // have been cancelled.
+  for (const auto& frame_callback : active_frame_callbacks_)
+    frame_callback.Run(base::TimeTicks());
+
+  presentation_callbacks_.splice(presentation_callbacks_.end(),
+                                 pending_presentation_callbacks_);
+  swapping_presentation_callbacks_.splice(
+      swapping_presentation_callbacks_.end(), presentation_callbacks_);
+  swapped_presentation_callbacks_.splice(swapped_presentation_callbacks_.end(),
+                                         swapping_presentation_callbacks_);
+  // Call all presentation callbacks with a null presentation time to indicate
+  // that they have been cancelled.
+  for (const auto& presentation_callback : swapped_presentation_callbacks_)
+    presentation_callback.Run(base::TimeTicks(), base::TimeDelta());
 
   compositor_frame_sink_holder_->GetCompositorFrameSink()->EvictFrame();
 }
 
 // static
 Surface* Surface::AsSurface(const aura::Window* window) {
   return window->GetProperty(kSurfaceKey);
 }
 
 cc::SurfaceId Surface::GetSurfaceId() const {
@@ skipping 13 matching lines @@
 
   pending_damage_.op(gfx::RectToSkIRect(damage), SkRegion::kUnion_Op);
 }
 
 void Surface::RequestFrameCallback(const FrameCallback& callback) {
   TRACE_EVENT0("exo", "Surface::RequestFrameCallback");
 
   pending_frame_callbacks_.push_back(callback);
 }
 
+void Surface::RequestPresentationCallback(
+    const PresentationCallback& callback) {
+  TRACE_EVENT0("exo", "Surface::RequestPresentationCallback");
+
+  pending_presentation_callbacks_.push_back(callback);
+}
+
 void Surface::SetOpaqueRegion(const SkRegion& region) {
   TRACE_EVENT1("exo", "Surface::SetOpaqueRegion", "region",
                gfx::SkIRectToRect(region.getBounds()).ToString());
 
   pending_state_.opaque_region = region;
 }
 
 void Surface::SetInputRegion(const SkRegion& region) {
   TRACE_EVENT1("exo", "Surface::SetInputRegion", "region",
                gfx::SkIRectToRect(region.getBounds()).ToString());
@@ skipping 207 matching lines @@
   // Reset damage.
   pending_damage_.setEmpty();
 
   DCHECK(!current_resource_.id ||
          compositor_frame_sink_holder_->HasReleaseCallbackForResource(
              current_resource_.id));
 
   // Move pending frame callbacks to the end of frame_callbacks_.
   frame_callbacks_.splice(frame_callbacks_.end(), pending_frame_callbacks_);
 
+  // Move pending presentation callbacks to the end of presentation_callbacks_.
+  presentation_callbacks_.splice(presentation_callbacks_.end(),
+                                 pending_presentation_callbacks_);
+
   // Synchronize window hierarchy. This will position and update the stacking
   // order of all sub-surfaces after committing all pending state of sub-surface
   // descendants.
   aura::Window* stacking_target = nullptr;
   for (auto& sub_surface_entry : pending_sub_surfaces_) {
     Surface* sub_surface = sub_surface_entry.first;
 
     // Synchronsouly commit all pending state of the sub-surface and its
     // decendents.
     if (sub_surface->needs_commit_surface_hierarchy())
@@ skipping 80 matching lines @@
 }
 
 std::unique_ptr<base::trace_event::TracedValue> Surface::AsTracedValue() const {
   std::unique_ptr<base::trace_event::TracedValue> value(
       new base::trace_event::TracedValue());
   value->SetString("name", window_->layer()->name());
   return value;
 }
 
 void Surface::WillDraw() {
-  compositor_frame_sink_holder_->ActivateFrameCallbacks(&frame_callbacks_);
+  active_frame_callbacks_.splice(active_frame_callbacks_.end(),
+                                 frame_callbacks_);
+  swapping_presentation_callbacks_.splice(
+      swapping_presentation_callbacks_.end(), presentation_callbacks_);
+}
+
+bool Surface::NeedsBeginFrame() const {
+  return !active_frame_callbacks_.empty();
+}
+
+void Surface::BeginFrame(base::TimeTicks frame_time) {
+  while (!active_frame_callbacks_.empty()) {
+    active_frame_callbacks_.front().Run(frame_time);
+    active_frame_callbacks_.pop_front();
+  }
 }
 
 void Surface::CheckIfSurfaceHierarchyNeedsCommitToNewSurfaces() {
   if (HasLayerHierarchyChanged())
     SetSurfaceHierarchyNeedsCommitToNewSurfaces();
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// ui::ContextFactoryObserver overrides:
+
 void Surface::OnLostResources() {
   if (!local_frame_id_.is_valid())
     return;
 
   UpdateResource(false);
   UpdateSurface(true);
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// aura::WindowObserver overrides:
+
 void Surface::OnWindowAddedToRootWindow(aura::Window* window) {
   window->layer()->GetCompositor()->AddFrameSink(frame_sink_id_);
+  window->layer()->GetCompositor()->vsync_manager()->AddObserver(this);
 }
 
 void Surface::OnWindowRemovingFromRootWindow(aura::Window* window,
                                              aura::Window* new_root) {
   window->layer()->GetCompositor()->RemoveFrameSink(frame_sink_id_);
+  window->layer()->GetCompositor()->vsync_manager()->RemoveObserver(this);
 }
 
+////////////////////////////////////////////////////////////////////////////////
+// ui::CompositorVSyncManager::Observer overrides:
+
+void Surface::OnUpdateVSyncParameters(base::TimeTicks timebase,
+                                      base::TimeDelta interval) {
+  // Use current time if platform doesn't provide an accurate timebase.
+  if (timebase.is_null())
+    timebase = base::TimeTicks::Now();
+
+  while (!swapped_presentation_callbacks_.empty()) {
+    swapped_presentation_callbacks_.front().Run(timebase, interval);
+    swapped_presentation_callbacks_.pop_front();
+  }
+
+  // VSync parameters updates are generated at the start of a new swap. Move
+  // the swapping presentation callbacks to swapped callbacks so they fire
+  // at the next VSync parameters update as that will contain the presentation
+  // time for the previous frame.
+  swapped_presentation_callbacks_.splice(swapped_presentation_callbacks_.end(),
+                                         swapping_presentation_callbacks_);
+}
+
+////////////////////////////////////////////////////////////////////////////////
+// Buffer, private:
+
 Surface::State::State() : input_region(SkIRect::MakeLargest()) {}
 
 Surface::State::~State() = default;
 
 bool Surface::State::operator==(const State& other) {
   return (other.crop == crop && alpha == other.alpha &&
           other.blend_mode == blend_mode && other.viewport == viewport &&
           other.opaque_region == opaque_region &&
           other.buffer_scale == buffer_scale &&
           other.input_region == input_region);
@@ skipping 187 matching lines @@
 
 int64_t Surface::GetPropertyInternal(const void* key,
                                      int64_t default_value) const {
   std::map<const void*, Value>::const_iterator iter = prop_map_.find(key);
   if (iter == prop_map_.end())
     return default_value;
   return iter->second.value;
 }
 
 }  // namespace exo