cc: Make OutputSurface::SwapBuffers pure virtual

mojo/examples/compositor_app/compositor_host.cc

-// Copyright 2013 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 "mojo/examples/compositor_app/compositor_host.h"
-
-#include "cc/layers/layer.h"
-#include "cc/layers/solid_color_layer.h"
-#include "cc/output/begin_frame_args.h"
-#include "cc/output/context_provider.h"
-#include "cc/output/output_surface.h"
-#include "cc/trees/layer_tree_host.h"
-#include "mojo/cc/context_provider_mojo.h"
-
-namespace mojo {
-namespace examples {
-
-CompositorHost::CompositorHost(ScopedMessagePipeHandle command_buffer_handle)
-    : command_buffer_handle_(command_buffer_handle.Pass()),
-      compositor_thread_("compositor") {
-  DCHECK(command_buffer_handle_.is_valid());
-  bool started = compositor_thread_.Start();
-  DCHECK(started);
-
-  cc::LayerTreeSettings settings;
-  tree_ = cc::LayerTreeHost::CreateThreaded(
-      this,
-      NULL,
-      settings,
-      base::MessageLoopProxy::current(),
-      compositor_thread_.message_loop_proxy());
-  SetupScene();
-}
-
-CompositorHost::~CompositorHost() {}
-
-void CompositorHost::SetSize(const gfx::Size& viewport_size) {
-  tree_->SetViewportSize(viewport_size);
-  tree_->SetLayerTreeHostClientReady();
-}
-
-void CompositorHost::SetupScene() {
-  scoped_refptr<cc::Layer> root_layer = cc::SolidColorLayer::Create();
-  root_layer->SetBounds(gfx::Size(500, 500));
-  root_layer->SetBackgroundColor(SK_ColorBLUE);
-  root_layer->SetIsDrawable(true);
-  tree_->SetRootLayer(root_layer);
-
-  child_layer_ = cc::SolidColorLayer::Create();
-  child_layer_->SetBounds(gfx::Size(100, 100));
-  child_layer_->SetBackgroundColor(SK_ColorGREEN);
-  child_layer_->SetIsDrawable(true);
-  gfx::Transform child_transform;
-  child_transform.Translate(200, 200);
-  child_layer_->SetTransform(child_transform);
-  root_layer->AddChild(child_layer_);
-}
-
-void CompositorHost::WillBeginMainFrame(int frame_id) {}
-void CompositorHost::DidBeginMainFrame() {}
-
-void CompositorHost::BeginMainFrame(const cc::BeginFrameArgs& args) {
-  // TODO(jamesr): Should use cc's animation system.
-  static const double kDegreesPerSecond = 70.0;
-  double time_in_seconds = (args.frame_time - base::TimeTicks()).InSecondsF();
-  double child_rotation_degrees = kDegreesPerSecond * time_in_seconds;
-  gfx::Transform child_transform;
-  child_transform.Translate(200, 200);
-  child_transform.Rotate(child_rotation_degrees);
-  child_layer_->SetTransform(child_transform);
-  tree_->SetNeedsAnimate();
-}
-
-void CompositorHost::Layout() {}
-void CompositorHost::ApplyViewportDeltas(const gfx::Vector2d& inner_delta,
-                                         const gfx::Vector2d& outer_delta,
-                                         float page_scale,
-                                         float top_controls_delta) {}
-void CompositorHost::ApplyViewportDeltas(const gfx::Vector2d& scroll_delta,
-                                         float page_scale,
-                                         float top_controls_delta) {}
-
-void CompositorHost::RequestNewOutputSurface(bool fallback) {
-  tree_->SetOutputSurface(make_scoped_ptr(new cc::OutputSurface(
-      new ContextProviderMojo(command_buffer_handle_.Pass()))));
-}
-
-void CompositorHost::DidInitializeOutputSurface() {
-}
-
-void CompositorHost::WillCommit() {}
-void CompositorHost::DidCommit() {}
-void CompositorHost::DidCommitAndDrawFrame() {}
-void CompositorHost::DidCompleteSwapBuffers() {}
-
-}  // namespace examples
-}  // namespace mojo