[Remoting Android] Separate the display core from JniGlDisplayHandler

remoting/client/jni/jni_gl_display_handler.h

 // Copyright 2016 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.
 
 #ifndef REMOTING_CLIENT_JNI_JNI_GL_DISPLAY_HANDLER_H_
 #define REMOTING_CLIENT_JNI_JNI_GL_DISPLAY_HANDLER_H_
 
 #include <EGL/egl.h>
 #include <jni.h>
 
 #include "base/android/scoped_java_ref.h"
 #include "base/macros.h"
 #include "base/memory/weak_ptr.h"
 #include "remoting/client/gl_renderer.h"
 #include "remoting/client/gl_renderer_delegate.h"
+#include "remoting/client/queued_task_poster.h"
 #include "remoting/protocol/cursor_shape_stub.h"
 
 namespace remoting {
 
 namespace protocol {
 class VideoRenderer;
 }  // namespace protocol
 
 class ChromotingJniRuntime;
 class DualBufferFrameConsumer;
 class EglThreadContext;
-class QueuedTaskPoster;
 
 // Handles OpenGL display operations. Draws desktop and cursor on the OpenGL
-// surface.
-// JNI functions should all be called on the UI thread. user must call
-// Initialize() after the handler is constructed and Invalidate() before the
-// handler is destructed. The destructor must be called on the display thread.
-// Please see GlDisplay.java for documentations.
-// TODO(yuweih): Separate display thread logic into a core class.
-class JniGlDisplayHandler : public protocol::CursorShapeStub,
-                            public GlRendererDelegate {
+// surface. The handler should be used and destroyed on the UI thread. It also
+// has a core that works on the display thread.
+class JniGlDisplayHandler {
  public:
-  JniGlDisplayHandler(ChromotingJniRuntime* runtime);
-
-  // Destructor must be called on the display thread.
-  ~JniGlDisplayHandler() override;
-
-  // Must be called exactly once on the UI thread before using the handler.
-  void Initialize(const base::android::JavaRef<jobject>& java_client);
-
-  // Must be called on the UI thread before calling the destructor.
-  void Invalidate();
+  JniGlDisplayHandler(ChromotingJniRuntime* runtime,
+                      const base::android::JavaRef<jobject>& java_client);
+  ~JniGlDisplayHandler();
 
   std::unique_ptr<protocol::CursorShapeStub> CreateCursorShapeStub();
   std::unique_ptr<protocol::VideoRenderer> CreateVideoRenderer();
 
   static bool RegisterJni(JNIEnv* env);
 
   void OnSurfaceCreated(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& caller,
       const base::android::JavaParamRef<jobject>& surface);
@@ skipping 25 matching lines @@
       bool visible);
 
   void OnCursorInputFeedback(
       JNIEnv* env,
       const base::android::JavaParamRef<jobject>& caller,
       float x,
       float y,
       float diameter);
 
  private:
-  // Queues a task. All queued tasks will be posted to the display thread after
-  // the current task is finished.
-  // Do nothing if |ui_task_poster_| has already been released.
-  void PostSequentialTaskOnDisplayThread(const base::Closure& task);
+  class Core;
 
-  // GlRendererDelegate interface.
-  bool CanRenderFrame() override;
-  void OnFrameRendered() override;
-  void OnSizeChanged(int width, int height) override;
-
-  // CursorShapeStub interface.
-  void SetCursorShape(const protocol::CursorShapeInfo& cursor_shape) override;
-
-  static void NotifyRenderDoneOnUiThread(
-      base::android::ScopedJavaGlobalRef<jobject> java_display);
-
-  void SurfaceCreatedOnDisplayThread(
-      base::android::ScopedJavaGlobalRef<jobject> surface);
-
-  void SurfaceDestroyedOnDisplayThread();
-
-  static void ChangeCanvasSizeOnUiThread(
-      base::android::ScopedJavaGlobalRef<jobject> java_display,
-      int width,
-      int height);
+  // Callbacks from the core.
+  void OnRenderDone();
+  void OnCanvasSizeChanged(int width, int height);
 
   ChromotingJniRuntime* runtime_;
 
+  QueuedTaskPoster ui_task_poster_;
+
+  std::unique_ptr<Core> core_;
+
   base::android::ScopedJavaGlobalRef<jobject> java_display_;
 
-  std::unique_ptr<EglThreadContext> egl_context_;
-
-  base::WeakPtr<DualBufferFrameConsumer> frame_consumer_;
-
-  // |renderer_| must be deleted earlier than |egl_context_|.
-  GlRenderer renderer_;
-
-  std::unique_ptr<QueuedTaskPoster> ui_task_poster_;
-
-  // Used on display thread.
-  base::WeakPtr<JniGlDisplayHandler> weak_ptr_;
+  // Used on UI thread.
   base::WeakPtrFactory<JniGlDisplayHandler> weak_factory_;
   DISALLOW_COPY_AND_ASSIGN(JniGlDisplayHandler);
 };
 
 }  // namespace remoting
 
 #endif  // REMOTING_CLIENT_JNI_JNI_GL_DISPLAY_HANDLER_H_