Mojo surfaces service and example app

mojo/examples/surfaces_app/surfaces_app.cc

+// Copyright 2014 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 "base/bind.h"
+#include "base/macros.h"
+#include "base/message_loop/message_loop.h"
+#include "cc/surfaces/surface_id_allocator.h"
+#include "mojo/examples/surfaces_app/child.mojom.h"
+#include "mojo/examples/surfaces_app/embedder.h"
+#include "mojo/public/cpp/application/application_connection.h"
+#include "mojo/public/cpp/application/application_delegate.h"
+#include "mojo/public/cpp/system/core.h"
+#include "mojo/public/interfaces/service_provider/service_provider.mojom.h"
+#include "mojo/services/gles2/command_buffer.mojom.h"
+#include "mojo/services/public/cpp/geometry/geometry_type_converters.h"
+#include "mojo/services/public/cpp/surfaces/surfaces_type_converters.h"
+#include "mojo/services/public/interfaces/native_viewport/native_viewport.mojom.h"
+#include "ui/gfx/rect.h"
+
+namespace mojo {
+namespace examples {
+
+class SurfacesApp : public ApplicationDelegate,
+                    public surfaces::SurfaceClient,
+                    public NativeViewportClient {
+ public:
+  SurfacesApp() {}
+  virtual ~SurfacesApp() {}
+
+  // ApplicationDelegate implementation
+  virtual bool ConfigureIncomingConnection(
+      ApplicationConnection* connection) OVERRIDE {
+    connection->ConnectToService("mojo:mojo_native_viewport_service",
+                                 &viewport_);
+    viewport_.set_client(this);
+
+    connection->ConnectToService("mojo:mojo_surfaces_service", &surfaces_);
+    surfaces_.set_client(this);
+
+    size_ = gfx::Size(800, 600);
+
+    viewport_->Create(Rect::From(gfx::Rect(gfx::Point(10, 10), size_)));
+    viewport_->Show();
+
+    child_size_ = gfx::Size(size_.width() / 3, size_.height() / 2);
+    connection->ConnectToService("mojo:mojo_surfaces_child_app", &child_one_);
+    connection->ConnectToService("mojo:mojo_surfaces_child_app", &child_two_);
+    child_one_->ProduceFrame(surfaces::Color::From(SK_ColorBLUE),
+                             Size::From(child_size_),
+                             base::Bind(&SurfacesApp::ChildOneProducedFrame,
+                                        base::Unretained(this)));
+    child_two_->ProduceFrame(surfaces::Color::From(SK_ColorGREEN),
+                             Size::From(child_size_),
+                             base::Bind(&SurfacesApp::ChildTwoProducedFrame,
+                                        base::Unretained(this)));
+    embedder_.reset(new Embedder(surfaces_.get()));
+    return true;
+  }
+
+  void ChildOneProducedFrame(surfaces::SurfaceIdPtr id) {
+    child_one_id_ = id.To<cc::SurfaceId>();
+    Draw(45.0);
+  }
+
+  void ChildTwoProducedFrame(surfaces::SurfaceIdPtr id) {
+    child_two_id_ = id.To<cc::SurfaceId>();
+    Draw(45.0);
+  }
+
+  void Draw(double rotation_degrees) {
+    if (onscreen_id_.is_null()) {
+      onscreen_id_ = allocator_->GenerateId();
+      CommandBufferPtr cb;
+      viewport_->CreateGLES2Context(Get(&cb));
+      surfaces_->CreateGLES2BoundSurface(
+          cb.Pass(),
+          surfaces::SurfaceId::From(onscreen_id_),
+          Size::From(size_));
+      embedder_->SetSurfaceId(onscreen_id_);
+    }
+    if (child_one_id_.is_null() || child_two_id_.is_null())
+      return;
+    embedder_->ProduceFrame(
+        child_one_id_, child_two_id_, child_size_, size_, rotation_degrees);
+    base::MessageLoop::current()->PostDelayedTask(
+        FROM_HERE,
+        base::Bind(
+            &SurfacesApp::Draw, base::Unretained(this), rotation_degrees + 2.0),
+        base::TimeDelta::FromMilliseconds(17));
+  }
+
+  // surfaces::SurfaceClient implementation.
+  virtual void SetIdNamespace(uint32_t id_namespace) OVERRIDE {
+    allocator_.reset(new cc::SurfaceIdAllocator(id_namespace));
+    Draw(45.0);
+  }
+  virtual void ReturnResources(
+      Array<surfaces::ReturnedResourcePtr> resources) OVERRIDE {
+    DCHECK(!resources.size());
+  }
+
+  // NativeViewportClient implementation
+  virtual void OnCreated() OVERRIDE {}
+  virtual void OnBoundsChanged(mojo::RectPtr bounds) OVERRIDE {}
+  virtual void OnDestroyed() OVERRIDE {}
+  virtual void OnEvent(mojo::EventPtr event,
+                       const mojo::Callback<void()>& callback) OVERRIDE {
+    callback.Run();
+  }
+
+ private:
+  surfaces::SurfacePtr surfaces_;
+  cc::SurfaceId onscreen_id_;
+  scoped_ptr<cc::SurfaceIdAllocator> allocator_;
+  scoped_ptr<Embedder> embedder_;
+  ChildPtr child_one_;
+  cc::SurfaceId child_one_id_;
+  ChildPtr child_two_;
+  cc::SurfaceId child_two_id_;
+  gfx::Size size_;
+  gfx::Size child_size_;
+
+  NativeViewportPtr viewport_;
+
+  DISALLOW_COPY_AND_ASSIGN(SurfacesApp);
+};
+
+}  // namespace examples
+
+// static
+ApplicationDelegate* ApplicationDelegate::Create() {
+  return new examples::SurfacesApp();
+}
+
+}  // namespace mojo