Teach the native viewport service to draw a Surface into itself

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"
@@ skipping 11 matching lines @@
 #include "mojo/services/public/interfaces/surfaces/surfaces_service.mojom.h"
 #include "ui/gfx/rect.h"
 
 namespace mojo {
 namespace examples {
 
 class SurfacesApp : public ApplicationDelegate,
                     public SurfaceClient,
                     public NativeViewportClient {
  public:
-  SurfacesApp() : native_viewport_id_(0) {}
+  SurfacesApp() {}
   virtual ~SurfacesApp() {}
 
   // ApplicationDelegate implementation
   virtual bool ConfigureIncomingConnection(
       ApplicationConnection* connection) OVERRIDE {
     connection->ConnectToService("mojo:mojo_native_viewport_service",
                                  &viewport_);
     viewport_.set_client(this);
 
-    // TODO(jamesr): Should be mojo:mojo_gpu_service
-    connection->ConnectToService("mojo:mojo_native_viewport_service",
-                                 &gpu_service_);
-
     connection->ConnectToService("mojo:mojo_surfaces_service",
                                  &surfaces_service_);
     surfaces_service_->CreateSurfaceConnection(base::Bind(
         &SurfacesApp::SurfaceConnectionCreated, base::Unretained(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_gl_app",
                                  &child_two_);
     child_one_->ProduceFrame(Color::From(SK_ColorBLUE),
                              Size::From(child_size_),
                              base::Bind(&SurfacesApp::ChildOneProducedFrame,
                                         base::Unretained(this)));
     child_two_->ProduceFrame(Color::From(SK_ColorGREEN),
                              Size::From(child_size_),
                              base::Bind(&SurfacesApp::ChildTwoProducedFrame,
                                         base::Unretained(this)));
     return true;
   }
 
   void ChildOneProducedFrame(SurfaceIdPtr id) {
     child_one_id_ = id.To<cc::SurfaceId>();
-    Draw(10);
   }
 
   void ChildTwoProducedFrame(SurfaceIdPtr id) {
     child_two_id_ = id.To<cc::SurfaceId>();
-    Draw(10);
   }
 
   void Draw(int offset) {
-    if (onscreen_id_.is_null() || child_one_id_.is_null() ||
-        child_two_id_.is_null())
-      return;
     int bounced_offset = offset;
     if (offset > 200)
       bounced_offset = 400 - offset;
     embedder_->ProduceFrame(
         child_one_id_, child_two_id_, child_size_, size_, bounced_offset);
     base::MessageLoop::current()->PostDelayedTask(
         FROM_HERE,
         base::Bind(
             &SurfacesApp::Draw, base::Unretained(this), (offset + 2) % 400),
         base::TimeDelta::FromMilliseconds(50));
   }
 
   void SurfaceConnectionCreated(SurfacePtr surface, uint32_t id_namespace) {
     surface_ = surface.Pass();
     surface_.set_client(this);
     embedder_.reset(new Embedder(surface_.get()));
     allocator_.reset(new cc::SurfaceIdAllocator(id_namespace));
-    CreateSurfaceIfReady();
-  }
-  virtual void ReturnResources(
-      Array<ReturnedResourcePtr> resources) OVERRIDE {
-    DCHECK(!resources.size());
-  }
-
-  // NativeViewportClient implementation
-  virtual void OnCreated(uint64_t native_viewport_id) OVERRIDE {
-    native_viewport_id_ = native_viewport_id;
-    CreateSurfaceIfReady();
-  }
-
-  // We can't create our GLES2-bound surface until we have our id namespace from
-  // the surfaces service and our native viewport id from the native viewport
-  // service. There's no way of knowing which we'll get first, so we just start
-  // whenever both arrive.
-  void CreateSurfaceIfReady() {
-    if (!onscreen_id_.is_null())
-      return;
-    if (native_viewport_id_ == 0)
-      return;
-    if (!allocator_)
-      return;
 
     onscreen_id_ = allocator_->GenerateId();
     embedder_->SetSurfaceId(onscreen_id_);
-    CommandBufferPtr cb;
-    gpu_service_->CreateOnscreenGLES2Context(
-        native_viewport_id_, Size::From(size_), Get(&cb));
-    surface_->CreateGLES2BoundSurface(
-        cb.Pass(), SurfaceId::From(onscreen_id_), Size::From(size_));
+    surface_->CreateSurface(SurfaceId::From(onscreen_id_), Size::From(size_));
+    viewport_->SubmittedFrame(SurfaceId::From(onscreen_id_));
     Draw(10);
   }
+
+  // SurfaceClient implementation.
+  virtual void ReturnResources(Array<ReturnedResourcePtr> resources) OVERRIDE {
+    DCHECK(!resources.size());
+  }
+  // NativeViewportClient implementation.
+  virtual void OnCreated(uint64_t native_viewport_id) 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:
   SurfacesServicePtr surfaces_service_;
   SurfacePtr surface_;
   cc::SurfaceId onscreen_id_;
-  uint64_t native_viewport_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_;
-  GpuPtr gpu_service_;
 
   DISALLOW_COPY_AND_ASSIGN(SurfacesApp);
 };
 
 }  // namespace examples
 }  // namespace mojo
 
 MojoResult MojoMain(MojoHandle shell_handle) {
   mojo::ApplicationRunnerChromium runner(new mojo::examples::SurfacesApp);
   return runner.Run(shell_handle);
 }