Decouple GpuCompositorFrameSink from DisplayCompositor

services/ui/surfaces/gpu_compositor_frame_sink.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 "services/ui/surfaces/gpu_compositor_frame_sink.h"
-
-#include "cc/surfaces/surface_reference.h"
-#include "services/ui/surfaces/display_compositor.h"
-
-namespace ui {
-
-GpuCompositorFrameSink::GpuCompositorFrameSink(
-    DisplayCompositor* display_compositor,
-    const cc::FrameSinkId& frame_sink_id,
-    std::unique_ptr<cc::Display> display,
-    std::unique_ptr<cc::BeginFrameSource> begin_frame_source,
-    cc::mojom::MojoCompositorFrameSinkPrivateRequest
-        compositor_frame_sink_private_request,
-    cc::mojom::MojoCompositorFrameSinkClientPtr client)
-    : display_compositor_(display_compositor),
-      support_(this,
-               display_compositor->manager(),
-               frame_sink_id,
-               std::move(display),
-               std::move(begin_frame_source)),
-      surface_tracker_(frame_sink_id),
-      client_(std::move(client)),
-      compositor_frame_sink_private_binding_(
-          this,
-          std::move(compositor_frame_sink_private_request)) {
-  compositor_frame_sink_private_binding_.set_connection_error_handler(
-      base::Bind(&GpuCompositorFrameSink::OnPrivateConnectionLost,
-                 base::Unretained(this)));
-}
-
-GpuCompositorFrameSink::~GpuCompositorFrameSink() {
-  // For display root surfaces, remove the reference from top level root to
-  // indicate the display root surface is no longer visible.
-  if (support_.display() && surface_tracker_.current_surface_id().is_valid()) {
-    const cc::SurfaceId top_level_root_surface_id =
-        display_compositor_->manager()->GetRootSurfaceId();
-    std::vector<cc::SurfaceReference> references_to_remove{cc::SurfaceReference(
-        top_level_root_surface_id, surface_tracker_.current_surface_id())};
-    display_compositor_->RemoveSurfaceReferences(references_to_remove);
-  }
-}
-
-void GpuCompositorFrameSink::EvictFrame() {
-  support_.EvictFrame();
-}
-
-void GpuCompositorFrameSink::SetNeedsBeginFrame(bool needs_begin_frame) {
-  support_.SetNeedsBeginFrame(needs_begin_frame);
-}
-
-void GpuCompositorFrameSink::SubmitCompositorFrame(
-    const cc::LocalFrameId& local_frame_id,
-    cc::CompositorFrame frame) {
-  cc::SurfaceId start_surface_id = surface_tracker_.current_surface_id();
-  surface_tracker_.UpdateReferences(local_frame_id,
-                                    frame.metadata.referenced_surfaces);
-
-  support_.SubmitCompositorFrame(local_frame_id, std::move(frame));
-
-  // Get the list of surfaces to add/remove from |surface_tracker_| so we can
-  // append to them before adding/removing.
-  std::vector<cc::SurfaceReference>& references_to_add =
-      surface_tracker_.references_to_add();
-  std::vector<cc::SurfaceReference>& references_to_remove =
-      surface_tracker_.references_to_remove();
-
-  // Append TLR references for the display root surfaces when display root
-  // surface changes.
-  if (support_.display() &&
-      start_surface_id != surface_tracker_.current_surface_id()) {
-    const cc::SurfaceId top_level_root_surface_id =
-        display_compositor_->manager()->GetRootSurfaceId();
-
-    // The first frame will not have a valid |start_surface_id| and there will
-    // be no surface to remove.
-    if (start_surface_id.local_frame_id().is_valid()) {
-      references_to_remove.push_back(
-          cc::SurfaceReference(top_level_root_surface_id, start_surface_id));
-    }
-
-    references_to_add.push_back(cc::SurfaceReference(
-        top_level_root_surface_id, surface_tracker_.current_surface_id()));
-  }
-
-  if (!references_to_add.empty())
-    display_compositor_->AddSurfaceReferences(references_to_add);
-  if (!references_to_remove.empty())
-    display_compositor_->RemoveSurfaceReferences(references_to_remove);
-}
-
-void GpuCompositorFrameSink::Require(const cc::LocalFrameId& local_frame_id,
-                                     const cc::SurfaceSequence& sequence) {
-  support_.Require(local_frame_id, sequence);
-}
-
-void GpuCompositorFrameSink::Satisfy(const cc::SurfaceSequence& sequence) {
-  support_.Satisfy(sequence);
-}
-
-void GpuCompositorFrameSink::DidReceiveCompositorFrameAck() {
-  if (client_)
-    client_->DidReceiveCompositorFrameAck();
-}
-
-void GpuCompositorFrameSink::AddChildFrameSink(
-    const cc::FrameSinkId& child_frame_sink_id) {
-  support_.AddChildFrameSink(child_frame_sink_id);
-}
-
-void GpuCompositorFrameSink::RemoveChildFrameSink(
-    const cc::FrameSinkId& child_frame_sink_id) {
-  support_.RemoveChildFrameSink(child_frame_sink_id);
-}
-
-void GpuCompositorFrameSink::OnBeginFrame(const cc::BeginFrameArgs& args) {
-  if (client_)
-    client_->OnBeginFrame(args);
-}
-
-void GpuCompositorFrameSink::ReclaimResources(
-    const cc::ReturnedResourceArray& resources) {
-  if (client_)
-    client_->ReclaimResources(resources);
-}
-
-void GpuCompositorFrameSink::WillDrawSurface() {
-  if (client_)
-    client_->WillDrawSurface();
-}
-
-void GpuCompositorFrameSink::OnClientConnectionLost() {
-  client_connection_lost_ = true;
-  // Request destruction of |this| only if both connections are lost.
-  display_compositor_->OnCompositorFrameSinkClientConnectionLost(
-      support_.frame_sink_id(), private_connection_lost_);
-}
-
-void GpuCompositorFrameSink::OnPrivateConnectionLost() {
-  private_connection_lost_ = true;
-  // Request destruction of |this| only if both connections are lost.
-  display_compositor_->OnCompositorFrameSinkPrivateConnectionLost(
-      support_.frame_sink_id(), client_connection_lost_);
-}
-
-}  // namespace ui