Mojo multiple command buffer support and sample

mojo/examples/sample_app/sample_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 "mojo/examples/sample_app/gles2_client_impl.h"
 #include "mojo/public/cpp/application/application_connection.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/public/cpp/system/macros.h"
 #include "mojo/public/cpp/utility/run_loop.h"
+#include "mojo/services/public/interfaces/gpu/gpu.mojom.h"
 #include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
 
 namespace examples {
 
 class SampleApp : public mojo::ApplicationDelegate,
                   public mojo::NativeViewportClient {
  public:
   SampleApp() {}
 
   virtual ~SampleApp() {
     // TODO(darin): Fix shutdown so we don't need to leak this.
     MOJO_ALLOW_UNUSED GLES2ClientImpl* leaked = gles2_client_.release();
   }
 
   virtual void Initialize(mojo::ApplicationImpl* app) MOJO_OVERRIDE {
     app->ConnectToService("mojo:mojo_native_viewport_service", &viewport_);
     viewport_.set_client(this);
 
+    // TODO(jamesr): Should be mojo:mojo_gpu_service
+    app->ConnectToService("mojo:mojo_native_viewport_service", &gpu_service_);
+
     mojo::RectPtr rect(mojo::Rect::New());
     rect->x = 10;
     rect->y = 10;
     rect->width = 800;
     rect->height = 600;
     viewport_->Create(rect.Pass());
     viewport_->Show();
+  }
 
+  virtual void OnCreated(uint64_t native_viewport_id) MOJO_OVERRIDE {
+    mojo::SizePtr size = mojo::Size::New();
+    size->width = 800;
+    size->height = 600;
     mojo::CommandBufferPtr command_buffer;
-    viewport_->CreateGLES2Context(Get(&command_buffer));
+    gpu_service_->CreateOnscreenGLES2Context(
+        native_viewport_id, size.Pass(), Get(&command_buffer));
     gles2_client_.reset(new GLES2ClientImpl(command_buffer.Pass()));
   }
 
-  virtual void OnCreated() MOJO_OVERRIDE {
-  }
-
-  virtual void OnDestroyed(
-      const mojo::Callback<void()>& callback) MOJO_OVERRIDE {
-    mojo::RunLoop::current()->Quit();
-    callback.Run();
-  }
+  virtual void OnDestroyed() MOJO_OVERRIDE { mojo::RunLoop::current()->Quit(); }
 
   virtual void OnBoundsChanged(mojo::RectPtr bounds) MOJO_OVERRIDE {
     assert(bounds);
     mojo::SizePtr size(mojo::Size::New());
     size->width = bounds->width;
     size->height = bounds->height;
-    gles2_client_->SetSize(*size);
+    if (gles2_client_)
+      gles2_client_->SetSize(*size);
   }
 
   virtual void OnEvent(mojo::EventPtr event,
                        const mojo::Callback<void()>& callback) MOJO_OVERRIDE {
     assert(event);
     if (event->location_data && event->location_data->in_view_location)
       gles2_client_->HandleInputEvent(*event);
     callback.Run();
   }
 
  private:
   scoped_ptr<GLES2ClientImpl> gles2_client_;
   mojo::NativeViewportPtr viewport_;
+  mojo::GpuPtr gpu_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SampleApp);
 };
 
 }  // namespace examples
 
 namespace mojo {
 
 // static
 ApplicationDelegate* ApplicationDelegate::Create() {
   return new examples::SampleApp();
 }
 
 }  // namespace mojo