Mojo container example for hosting Pepper plugins

mojo/examples/pepper_container_app/pepper_container_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/macros.h"
+#include "base/memory/ref_counted.h"
+#include "base/memory/scoped_ptr.h"
+#include "base/message_loop/message_loop.h"
+#include "build/build_config.h"
+#include "mojo/examples/pepper_container_app/mojo_ppapi_globals.h"
+#include "mojo/examples/pepper_container_app/plugin_instance.h"
+#include "mojo/examples/pepper_container_app/plugin_module.h"
+#include "mojo/examples/pepper_container_app/type_converters.h"
+#include "mojo/public/bindings/allocation_scope.h"
+#include "mojo/public/bindings/remote_ptr.h"
+#include "mojo/public/environment/environment.h"
+#include "mojo/public/gles2/gles2_cpp.h"
+#include "mojo/public/shell/application.h"
+#include "mojo/public/shell/shell.mojom.h"
+#include "mojo/public/system/core.h"
+#include "mojo/services/native_viewport/native_viewport.mojom.h"
+#include "ppapi/c/pp_rect.h"
+#include "ppapi/shared_impl/proxy_lock.h"
+
+#if defined(OS_WIN)
+#if !defined(CDECL)
+#define CDECL __cdecl
+#endif
+#define PEPPER_CONTAINER_APP_EXPORT __declspec(dllexport)
+#else
+#define CDECL
+#define PEPPER_CONTAINER_APP_EXPORT __attribute__((visibility("default")))
+#endif
+
+namespace mojo {
+namespace examples {
+
+class PepperContainerApp: public Application,
+                          public NativeViewportClient,
+                          public MojoPpapiGlobals::Delegate {
+ public:
+  explicit PepperContainerApp(MojoHandle shell_handle)
+      : Application(shell_handle),
+        ppapi_globals_(this),
+        plugin_module_(new PluginModule) {
+    InterfacePipe<NativeViewport, AnyInterface> viewport_pipe;
+    mojo::AllocationScope scope;
+    shell()->Connect("mojo:mojo_native_viewport_service",
+                     viewport_pipe.handle_to_peer.Pass());
+    viewport_.reset(viewport_pipe.handle_to_self.Pass(), this);
+    Rect::Builder rect;
+    Point::Builder point;
+    point.set_x(10);
+    point.set_y(10);
+    rect.set_position(point.Finish());
+    Size::Builder size;
+    size.set_width(800);
+    size.set_height(600);
+    rect.set_size(size.Finish());
+    viewport_->Create(rect.Finish());
+    viewport_->Show();
+  }
+
+  virtual ~PepperContainerApp() {}
+
+  // NativeViewportClient implementation.
+  virtual void OnCreated() OVERRIDE {
+    ppapi::ProxyAutoLock lock;
+
+    plugin_instance_ = plugin_module_->CreateInstance().Pass();
+    if (!plugin_instance_->DidCreate())
+      plugin_instance_.reset();
+  }
+
+  virtual void OnDestroyed() OVERRIDE {
+    ppapi::ProxyAutoLock lock;
+
+    if (plugin_instance_) {
+      plugin_instance_->DidDestroy();
+      plugin_instance_.reset();
+    }
+
+    base::MessageLoop::current()->Quit();
+  }
+
+  virtual void OnBoundsChanged(const Rect& bounds) OVERRIDE {
+    ppapi::ProxyAutoLock lock;
+
+    if (plugin_instance_)
+      plugin_instance_->DidChangeView(bounds);
+  }
+
+  virtual void OnEvent(const Event& event) OVERRIDE {
+    ppapi::ProxyAutoLock lock;
+
+    if (!event.location().is_null()) {
+      // TODO(yzshen): Handle events.
+      viewport_->AckEvent(event);

[viettrungluu, 2014/03/21 04:20:00]

I'm somewhat sceptical that you should call the viewport_ while holding the
proxy lock, but I don't think it does any harm.

[yzshen1, 2014/03/21 17:52:08]

Right. I don't think it will lead to deadlock, but better minimize the scope
that we lock.

+    }
+  }
+
+  // MojoPpapiGlobals::Delegate implementation.
+  virtual ScopedMessagePipeHandle CreateGLES2Context() OVERRIDE {
+    MessagePipe gles2_pipe;
+    viewport_->CreateGLES2Context(gles2_pipe.handle1.Pass());
+    return gles2_pipe.handle0.Pass();
+  }
+
+ private:
+  MojoPpapiGlobals ppapi_globals_;
+
+  RemotePtr<NativeViewport> viewport_;
+  scoped_refptr<PluginModule> plugin_module_;
+  scoped_ptr<PluginInstance> plugin_instance_;
+
+  DISALLOW_COPY_AND_ASSIGN(PepperContainerApp);
+};
+
+}  // namespace examples
+}  // namespace mojo
+
+extern "C" PEPPER_CONTAINER_APP_EXPORT MojoResult CDECL MojoMain(
+    MojoHandle shell_handle) {
+  mojo::Environment env;
+  mojo::GLES2Initializer gles2;
+  base::MessageLoop run_loop;
+  mojo::examples::PepperContainerApp app(shell_handle);
+
+  run_loop.Run();
+  return MOJO_RESULT_OK;
+}