Move DisplayCompositor code to new component.

services/ui/surfaces/display_compositor.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/display_compositor.h"
-
-#include <utility>
-
-#include "base/command_line.h"
-#include "base/memory/ptr_util.h"
-#include "base/threading/thread_task_runner_handle.h"
-#include "cc/base/switches.h"
-#include "cc/output/in_process_context_provider.h"
-#include "cc/output/texture_mailbox_deleter.h"
-#include "cc/surfaces/display.h"
-#include "cc/surfaces/display_scheduler.h"
-#include "cc/surfaces/surface.h"
-#include "components/display_compositor/gpu_compositor_frame_sink.h"
-#include "components/display_compositor/gpu_root_compositor_frame_sink.h"
-#include "gpu/command_buffer/client/shared_memory_limits.h"
-#include "gpu/ipc/gpu_in_process_thread_service.h"
-#include "mojo/public/cpp/bindings/strong_binding.h"
-#include "services/ui/surfaces/display_output_surface.h"
-
-#if defined(USE_OZONE)
-#include "gpu/command_buffer/client/gles2_interface.h"
-#include "services/ui/surfaces/display_output_surface_ozone.h"
-#endif
-
-namespace ui {
-
-DisplayCompositor::DisplayCompositor(
-    scoped_refptr<gpu::InProcessCommandBuffer::Service> gpu_service,
-    std::unique_ptr<gpu::GpuMemoryBufferManager> gpu_memory_buffer_manager,
-    gpu::ImageFactory* image_factory,
-    cc::mojom::DisplayCompositorRequest request,
-    cc::mojom::DisplayCompositorClientPtr client)
-    : manager_(cc::SurfaceManager::LifetimeType::REFERENCES),
-      gpu_service_(std::move(gpu_service)),
-      gpu_memory_buffer_manager_(std::move(gpu_memory_buffer_manager)),
-      image_factory_(image_factory),
-      task_runner_(base::ThreadTaskRunnerHandle::Get()),
-      client_(std::move(client)),
-      binding_(this, std::move(request)) {
-  manager_.AddObserver(this);
-}
-
-DisplayCompositor::~DisplayCompositor() {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  manager_.RemoveObserver(this);
-}
-
-void DisplayCompositor::CreateRootCompositorFrameSink(
-    const cc::FrameSinkId& frame_sink_id,
-    gpu::SurfaceHandle surface_handle,
-    cc::mojom::MojoCompositorFrameSinkAssociatedRequest request,
-    cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
-    cc::mojom::MojoCompositorFrameSinkClientPtr client,
-    cc::mojom::DisplayPrivateAssociatedRequest display_private_request) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_NE(surface_handle, gpu::kNullSurfaceHandle);
-  DCHECK_EQ(0u, compositor_frame_sinks_.count(frame_sink_id));
-
-  std::unique_ptr<cc::SyntheticBeginFrameSource> begin_frame_source(
-      new cc::DelayBasedBeginFrameSource(
-          base::MakeUnique<cc::DelayBasedTimeSource>(task_runner_.get())));
-  std::unique_ptr<cc::Display> display =
-      CreateDisplay(frame_sink_id, surface_handle, begin_frame_source.get());
-
-  // Lazily inject a SurfaceDependencyTracker into SurfaceManager if surface
-  // synchronization is enabled.
-  if (!manager_.dependency_tracker() &&
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          cc::switches::kEnableSurfaceSynchronization)) {
-    std::unique_ptr<cc::SurfaceDependencyTracker> dependency_tracker(
-        new cc::SurfaceDependencyTracker(&manager_, begin_frame_source.get()));
-    manager_.SetDependencyTracker(std::move(dependency_tracker));
-  }
-
-  compositor_frame_sinks_[frame_sink_id] =
-      base::MakeUnique<display_compositor::GpuRootCompositorFrameSink>(
-          this, &manager_, frame_sink_id, std::move(display),
-          std::move(begin_frame_source), std::move(request),
-          std::move(private_request), std::move(client),
-          std::move(display_private_request));
-}
-
-void DisplayCompositor::CreateCompositorFrameSink(
-    const cc::FrameSinkId& frame_sink_id,
-    cc::mojom::MojoCompositorFrameSinkRequest request,
-    cc::mojom::MojoCompositorFrameSinkPrivateRequest private_request,
-    cc::mojom::MojoCompositorFrameSinkClientPtr client) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_EQ(0u, compositor_frame_sinks_.count(frame_sink_id));
-
-  compositor_frame_sinks_[frame_sink_id] =
-      base::MakeUnique<display_compositor::GpuCompositorFrameSink>(
-          this, &manager_, frame_sink_id, std::move(request),
-          std::move(private_request), std::move(client));
-}
-
-void DisplayCompositor::RegisterFrameSinkHierarchy(
-    const cc::FrameSinkId& parent_frame_sink_id,
-    const cc::FrameSinkId& child_frame_sink_id) {
-  manager_.RegisterFrameSinkHierarchy(parent_frame_sink_id,
-                                      child_frame_sink_id);
-}
-
-void DisplayCompositor::UnregisterFrameSinkHierarchy(
-    const cc::FrameSinkId& parent_frame_sink_id,
-    const cc::FrameSinkId& child_frame_sink_id) {
-  manager_.UnregisterFrameSinkHierarchy(parent_frame_sink_id,
-                                        child_frame_sink_id);
-}
-
-void DisplayCompositor::DropTemporaryReference(
-    const cc::SurfaceId& surface_id) {
-  manager_.DropTemporaryReference(surface_id);
-}
-
-std::unique_ptr<cc::Display> DisplayCompositor::CreateDisplay(
-    const cc::FrameSinkId& frame_sink_id,
-    gpu::SurfaceHandle surface_handle,
-    cc::SyntheticBeginFrameSource* begin_frame_source) {
-  scoped_refptr<cc::InProcessContextProvider> context_provider =
-      new cc::InProcessContextProvider(
-          gpu_service_, surface_handle, gpu_memory_buffer_manager_.get(),
-          image_factory_, gpu::SharedMemoryLimits(),
-          nullptr /* shared_context */);
-
-  // TODO(rjkroege): If there is something better to do than CHECK, add it.
-  CHECK(context_provider->BindToCurrentThread());
-
-  std::unique_ptr<cc::OutputSurface> display_output_surface;
-  if (context_provider->ContextCapabilities().surfaceless) {
-#if defined(USE_OZONE)
-    display_output_surface = base::MakeUnique<DisplayOutputSurfaceOzone>(
-        std::move(context_provider), surface_handle,
-        begin_frame_source, gpu_memory_buffer_manager_.get(),
-        GL_TEXTURE_2D, GL_RGB);
-#else
-    NOTREACHED();
-#endif
-  } else {
-    display_output_surface = base::MakeUnique<DisplayOutputSurface>(
-        std::move(context_provider), begin_frame_source);
-  }
-
-  int max_frames_pending =
-      display_output_surface->capabilities().max_frames_pending;
-  DCHECK_GT(max_frames_pending, 0);
-
-  std::unique_ptr<cc::DisplayScheduler> scheduler(
-      new cc::DisplayScheduler(task_runner_.get(), max_frames_pending));
-
-  cc::RendererSettings settings;
-  settings.show_overdraw_feedback =
-      base::CommandLine::ForCurrentProcess()->HasSwitch(
-          cc::switches::kShowOverdrawFeedback);
-
-  return base::MakeUnique<cc::Display>(
-      nullptr /* bitmap_manager */, gpu_memory_buffer_manager_.get(), settings,
-      frame_sink_id, begin_frame_source, std::move(display_output_surface),
-      std::move(scheduler),
-      base::MakeUnique<cc::TextureMailboxDeleter>(task_runner_.get()));
-}
-
-void DisplayCompositor::DestroyCompositorFrameSink(cc::FrameSinkId sink_id) {
-  compositor_frame_sinks_.erase(sink_id);
-}
-
-void DisplayCompositor::OnSurfaceCreated(const cc::SurfaceInfo& surface_info) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  DCHECK_GT(surface_info.device_scale_factor(), 0.0f);
-
-  // TODO(kylechar): |client_| will try to find an owner for the temporary
-  // reference to the new surface. With surface synchronization this might not
-  // be necessary, because a surface reference might already exist and no
-  // temporary reference was created. It could be useful to let |client_| know
-  // if it should find an owner.
-  if (client_)
-    client_->OnSurfaceCreated(surface_info);
-}
-
-void DisplayCompositor::OnSurfaceDamaged(const cc::SurfaceId& surface_id,
-                                         bool* changed) {}
-
-void DisplayCompositor::OnClientConnectionLost(
-    const cc::FrameSinkId& frame_sink_id,
-    bool destroy_compositor_frame_sink) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (destroy_compositor_frame_sink)
-    DestroyCompositorFrameSink(frame_sink_id);
-  // TODO(fsamuel): Tell the display compositor host that the client connection
-  // has been lost so that it can drop its private connection and allow a new
-  // client instance to create a new CompositorFrameSink.
-}
-
-void DisplayCompositor::OnPrivateConnectionLost(
-    const cc::FrameSinkId& frame_sink_id,
-    bool destroy_compositor_frame_sink) {
-  DCHECK(thread_checker_.CalledOnValidThread());
-  if (destroy_compositor_frame_sink)
-    DestroyCompositorFrameSink(frame_sink_id);
-}
-
-}  // namespace ui