Pull parts of TopLevelDisplayClient into DisplayCompositor

components/mus/surfaces/display_compositor.cc

+// Copyright 2016 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/mus/surfaces/display_compositor.h"
+
+#include "cc/output/copy_output_request.h"
+#include "cc/output/output_surface.h"
+#include "cc/output/renderer_settings.h"
+#include "cc/surfaces/display.h"
+#include "components/mus/surfaces/direct_output_surface.h"
+#include "components/mus/surfaces/surfaces_context_provider.h"
+#include "components/mus/surfaces/top_level_display_client.h"
+
+#if defined(USE_OZONE)
+#include "components/mus/surfaces/direct_output_surface_ozone.h"
+#include "gpu/command_buffer/client/gles2_interface.h"
+#endif
+
+namespace mus {
+
+namespace {
+
+void CallCallback(const base::Closure& callback, cc::SurfaceDrawStatus status) {
+  callback.Run();
+}
+
+}  // namespace
+
+DisplayCompositor::DisplayCompositor(
+    scoped_refptr<base::SingleThreadTaskRunner> task_runner,
+    gfx::AcceleratedWidget widget,
+    const scoped_refptr<GpuState>& gpu_state,
+    const scoped_refptr<SurfacesState>& surfaces_state)
+    : task_runner_(task_runner),
+      surfaces_state_(surfaces_state),
+      factory_(surfaces_state->manager(), this),
+      allocator_(surfaces_state->next_id_namespace()) {
+  surfaces_state_->manager()->RegisterSurfaceFactoryClient(
+      allocator_.id_namespace(), this);
+
+  scoped_refptr<SurfacesContextProvider> surfaces_context_provider(
+      new SurfacesContextProvider(widget, gpu_state));
+  // TODO(rjkroege): If there is something better to do than CHECK, add it.
+  CHECK(surfaces_context_provider->BindToCurrentThread());
+
+  std::unique_ptr<cc::OutputSurface> output_surface;
+  if (surfaces_context_provider->ContextCapabilities().surfaceless) {
+#if defined(USE_OZONE)
+    output_surface = base::WrapUnique(new DirectOutputSurfaceOzone(
+        surfaces_context_provider, widget, task_runner_.get(), GL_TEXTURE_2D,
+        GL_RGB));
+#else
+    NOTREACHED();
+#endif
+  } else {
+    output_surface = base::WrapUnique(
+        new DirectOutputSurface(surfaces_context_provider, task_runner_.get()));
+  }
+
+  int max_frames_pending = output_surface->capabilities().max_frames_pending;
+  DCHECK_GT(max_frames_pending, 0);
+
+  display_client_.reset(new TopLevelDisplayClient(
+      std::move(output_surface), surfaces_state_->manager(),
+      nullptr /* bitmap_manager */, nullptr /* gpu_memory_buffer_manager */,
+      cc::RendererSettings(), task_runner_, allocator_.id_namespace()));
+
+  display_client_->Initialize();
+}
+
+DisplayCompositor::~DisplayCompositor() {
+  surfaces_state_->manager()->UnregisterSurfaceFactoryClient(
+      allocator_.id_namespace());
+}
+
+void DisplayCompositor::SubmitCompositorFrame(
+    std::unique_ptr<cc::CompositorFrame> frame,
+    const base::Closure& callback) {
+  gfx::Size frame_size =
+      frame->delegated_frame_data->render_pass_list.back()->output_rect.size();
+  if (frame_size.IsEmpty() || frame_size != display_size_) {
+    if (!surface_id_.is_null())
+      factory_.Destroy(surface_id_);
+    surface_id_ = allocator_.GenerateId();
+    factory_.Create(surface_id_);
+    display_size_ = frame_size;
+    display_client_->display()->Resize(display_size_);
+  }
+  display_client_->display()->SetSurfaceId(surface_id_,
+                                           frame->metadata.device_scale_factor);
+  factory_.SubmitCompositorFrame(surface_id_, std::move(frame),

[rjkroege, 2016/05/12 23:26:36]

why do you need to wrap the Callback?

[Fady Samuel, 2016/05/13 18:43:41]

Removed.

+                                 base::Bind(&CallCallback, callback));
+}
+
+void DisplayCompositor::RequestCopyOfOutput(
+    std::unique_ptr<cc::CopyOutputRequest> output_request) {
+  factory_.RequestCopyOfSurface(surface_id_, std::move(output_request));
+}
+
+void DisplayCompositor::ReturnResources(
+    const cc::ReturnedResourceArray& resources) {
+  // TODO(fsamuel): Implement this.
+}
+
+void DisplayCompositor::SetBeginFrameSource(
+    cc::BeginFrameSource* begin_frame_source) {
+  // TODO(fsamuel): Implement this.
+}
+
+}  // namespace mus