Implement aura::WindowPortMus::CreateCompositorFrameSink()

services/ui/public/cpp/client_compositor_frame_sink.cc

 // Copyright 2014 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 "services/ui/public/cpp/client_compositor_frame_sink.h"
 
 #include "base/bind.h"
 #include "base/memory/ptr_util.h"
 #include "cc/output/begin_frame_args.h"
 #include "cc/output/compositor_frame.h"
@@ skipping 19 matching lines @@
       compositor_frame_sink_client.PassInterface()));
   return base::WrapUnique(new ClientCompositorFrameSink(
       std::move(context_provider), gpu_memory_buffer_manager,
       compositor_frame_sink.PassInterface(),
       std::move(compositor_frame_sink_client_request),
       enable_surface_synchronization));
 }
 
 ClientCompositorFrameSink::~ClientCompositorFrameSink() {}
 
+void ClientCompositorFrameSink::SetSurfaceChangedCallback(
+    const SurfaceChangedCallback& callback) {
+  DCHECK(!surface_changed_callback_);
+  surface_changed_callback_ = callback;
+}
+
 bool ClientCompositorFrameSink::BindToClient(
     cc::CompositorFrameSinkClient* client) {
   if (!cc::CompositorFrameSink::BindToClient(client))
     return false;
 
   DCHECK(!thread_checker_);
   thread_checker_.reset(new base::ThreadChecker());
   compositor_frame_sink_.Bind(std::move(compositor_frame_sink_info_));
   client_binding_.reset(
       new mojo::Binding<cc::mojom::MojoCompositorFrameSinkClient>(
           this, std::move(client_request_)));
 
   begin_frame_source_ = base::MakeUnique<cc::ExternalBeginFrameSource>(this);
 
   client->SetBeginFrameSource(begin_frame_source_.get());
   return true;
 }
 
 void ClientCompositorFrameSink::DetachFromClient() {
+  if (surface_changed_callback_ && local_surface_id_.is_valid())
+    surface_changed_callback_.Run(cc::LocalSurfaceId(), gfx::Size());
   client_->SetBeginFrameSource(nullptr);
   begin_frame_source_.reset();
   client_binding_.reset();
   compositor_frame_sink_.reset();
   cc::CompositorFrameSink::DetachFromClient();
 }
 
 void ClientCompositorFrameSink::SetLocalSurfaceId(
     const cc::LocalSurfaceId& local_surface_id) {
   DCHECK(local_surface_id.is_valid());
   DCHECK(enable_surface_synchronization_);
   local_surface_id_ = local_surface_id;
 }
 
 void ClientCompositorFrameSink::SubmitCompositorFrame(
     cc::CompositorFrame frame) {
   DCHECK(thread_checker_);
   DCHECK(thread_checker_->CalledOnValidThread());
   if (!compositor_frame_sink_)
     return;
 
   DCHECK_LE(cc::BeginFrameArgs::kStartingFrameNumber,
             frame.metadata.begin_frame_ack.sequence_number);
 
+  bool surface_changed = false;
   gfx::Size frame_size = frame.render_pass_list.back()->output_rect.size();
   if (!local_surface_id_.is_valid() ||
       frame_size != last_submitted_frame_size_) {
     last_submitted_frame_size_ = frame_size;
-    if (!enable_surface_synchronization_)
+    if (!enable_surface_synchronization_) {
       local_surface_id_ = id_allocator_.GenerateId();
+      surface_changed = true;
+    }
   }
   compositor_frame_sink_->SubmitCompositorFrame(local_surface_id_,
                                                 std::move(frame));
+  if (surface_changed && surface_changed_callback_)
+    surface_changed_callback_.Run(local_surface_id_, frame_size);
 }
 
 ClientCompositorFrameSink::ClientCompositorFrameSink(
     scoped_refptr<cc::ContextProvider> context_provider,
     gpu::GpuMemoryBufferManager* gpu_memory_buffer_manager,
     cc::mojom::MojoCompositorFrameSinkPtrInfo compositor_frame_sink_info,
     cc::mojom::MojoCompositorFrameSinkClientRequest client_request,
     bool enable_surface_synchronization)
     : cc::CompositorFrameSink(std::move(context_provider),
                               nullptr,
@@ skipping 50 matching lines @@
 ClientCompositorFrameSinkBinding::TakeFrameSinkRequest() {
   return std::move(compositor_frame_sink_request_);
 }
 
 cc::mojom::MojoCompositorFrameSinkClientPtrInfo
 ClientCompositorFrameSinkBinding::TakeFrameSinkClient() {
   return std::move(compositor_frame_sink_client_);
 }
 
 }  // namespace ui