cc: Make OutputSurface::SwapBuffers pure virtual

mojo/examples/compositor_app/compositor_app.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 <stdio.h>
-#include <string>
-
-#include "base/bind.h"
-#include "base/macros.h"
-#include "base/memory/weak_ptr.h"
-#include "mojo/application/application_runner_chromium.h"
-#include "mojo/examples/compositor_app/compositor_host.h"
-#include "mojo/public/c/system/main.h"
-#include "mojo/public/cpp/application/application_delegate.h"
-#include "mojo/public/cpp/application/application_impl.h"
-#include "mojo/public/cpp/system/core.h"
-#include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
-#include "mojo/services/public/interfaces/gpu/gpu.mojom.h"
-#include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
-#include "ui/gfx/rect.h"
-
-namespace mojo {
-namespace examples {
-
-class SampleApp : public ApplicationDelegate, public NativeViewportClient {
- public:
-  SampleApp() : weak_factory_(this) {}
-  virtual ~SampleApp() {}
-
-  virtual void Initialize(ApplicationImpl* app) override {
-    app->ConnectToService("mojo:mojo_native_viewport_service", &viewport_);
-    viewport_.set_client(this);
-    viewport_->Create(Size::From(gfx::Size(800, 600)),
-                      base::Bind(&SampleApp::OnCreatedNativeViewport,
-                                 weak_factory_.GetWeakPtr()));
-    viewport_->Show();
-
-    // TODO(jamesr): Should be mojo:mojo_gpu_service
-    app->ConnectToService("mojo:mojo_native_viewport_service", &gpu_service_);
-  }
-
-  virtual void OnDestroyed() override { base::MessageLoop::current()->Quit(); }
-
-  virtual void OnSizeChanged(SizePtr size) override {
-    if (host_)
-      host_->SetSize(size.To<gfx::Size>());
-  }
-
-  virtual void OnEvent(EventPtr event,
-                       const mojo::Callback<void()>& callback) override {
-    callback.Run();
-  }
-
- private:
-  void OnCreatedNativeViewport(uint64_t native_viewport_id) {
-    CommandBufferPtr cb;
-    // TODO(jamesr): Output to a surface instead.
-    gpu_service_->CreateOnscreenGLES2Context(
-        native_viewport_id, Size::From(gfx::Size(800, 600)), GetProxy(&cb));
-    host_.reset(new CompositorHost(cb.PassMessagePipe()));
-  }
-
-
-  NativeViewportPtr viewport_;
-  GpuPtr gpu_service_;
-  scoped_ptr<CompositorHost> host_;
-  base::WeakPtrFactory<SampleApp> weak_factory_;
-
-  DISALLOW_COPY_AND_ASSIGN(SampleApp);
-};
-
-}  // namespace examples
-}  // namespace mojo
-
-MojoResult MojoMain(MojoHandle shell_handle) {
-  mojo::ApplicationRunnerChromium runner(new mojo::examples::SampleApp);
-  return runner.Run(shell_handle);
-}