Implement aura::Window::CreateCompositorFrameSink()

ui/aura/local/compositor_frame_sink_local.cc

+// Copyright 2017 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 "ui/aura/local/compositor_frame_sink_local.h"
+
+#include "cc/output/compositor_frame_sink_client.h"
+#include "cc/surfaces/compositor_frame_sink_support.h"
+#include "ui/aura/client/cursor_client.h"
+#include "ui/aura/env.h"
+#include "ui/aura/window.h"
+#include "ui/aura/window_delegate.h"
+#include "ui/display/display.h"
+#include "ui/display/screen.h"
+
+namespace aura {
+
+CompositorFrameSinkLocal::CompositorFrameSinkLocal(
+    const cc::FrameSinkId& frame_sink_id,
+    cc::SurfaceManager* surface_manager)
+    : cc::CompositorFrameSink(nullptr, nullptr, nullptr, nullptr),
+      frame_sink_id_(frame_sink_id) {
+  support_ = cc::CompositorFrameSinkSupport::Create(
+      this, surface_manager, frame_sink_id, false /* is_root */,
+      true /* handles_frame_sink_id_invalidation */,
+      true /* needs_sync_points */);
+}
+
+CompositorFrameSinkLocal::~CompositorFrameSinkLocal() {}
+
+bool CompositorFrameSinkLocal::BindToClient(
+    cc::CompositorFrameSinkClient* client) {
+  if (!cc::CompositorFrameSink::BindToClient(client))
+    return false;
+  DCHECK(!thread_checker_);
+  thread_checker_.reset(new base::ThreadChecker());
+
+  begin_frame_source_ = base::MakeUnique<cc::ExternalBeginFrameSource>(this);
+  client->SetBeginFrameSource(begin_frame_source_.get());
+  return true;
+}
+
+void CompositorFrameSinkLocal::SetSurfaceChangedCallback(
+    const SurfaceChangedCallback& callback) {
+  DCHECK(!surface_changed_callback_);
+  surface_changed_callback_ = callback;
+}
+
+void CompositorFrameSinkLocal::DetachFromClient() {
+  thread_checker_.reset();
+  cc::CompositorFrameSink::DetachFromClient();
+}
+
+void CompositorFrameSinkLocal::SubmitCompositorFrame(
+    cc::CompositorFrame frame) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+
+  cc::LocalSurfaceId old_local_surface_id = local_surface_id_;
+  if (!frame.render_pass_list.empty()) {
+    const auto& frame_size = frame.render_pass_list.back()->output_rect.size();
+    if (frame_size != last_submitted_frame_size_ ||
+        !local_surface_id_.is_valid()) {
+      last_submitted_frame_size_ = frame_size;
+      local_surface_id_ = id_allocator_.GenerateId();
+    }
+  }
+  support_->SubmitCompositorFrame(local_surface_id_, std::move(frame));
+
+  if (local_surface_id_ != old_local_surface_id) {
+    surface_changed_callback_.Run(
+        cc::SurfaceId(frame_sink_id_, local_surface_id_),
+        last_submitted_frame_size_);
+  }
+}
+
+void CompositorFrameSinkLocal::EvictFrame() {
+  support_->EvictFrame();
+}
+
+void CompositorFrameSinkLocal::DidReceiveCompositorFrameAck(
+    const cc::ReturnedResourceArray& resources) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+  if (!client_)
+    return;
+  client_->ReclaimResources(resources);
+  client_->DidReceiveCompositorFrameAck();
+}
+
+void CompositorFrameSinkLocal::OnBeginFrame(const cc::BeginFrameArgs& args) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+  begin_frame_source_->OnBeginFrame(args);
+}
+
+void CompositorFrameSinkLocal::ReclaimResources(
+    const cc::ReturnedResourceArray& resources) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+  if (!client_)
+    return;
+  client_->ReclaimResources(resources);
+}
+
+void CompositorFrameSinkLocal::OnNeedsBeginFrames(bool needs_begin_frames) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+  support_->SetNeedsBeginFrame(needs_begin_frames);
+}
+
+void CompositorFrameSinkLocal::OnDidFinishFrame(const cc::BeginFrameAck& ack) {
+  DCHECK(thread_checker_);
+  DCHECK(thread_checker_->CalledOnValidThread());
+  // If there was damage, the submitted CompositorFrame includes the ack.
+  if (!ack.has_damage)
+    support_->BeginFrameDidNotSwap(ack);
+}
+
+}  // namespace aura