Wrap ScreenCapturer with ScreenCapturerDifferWrapper

webrtc/modules/desktop_capture/desktop_capture_options.h

 /*
  *  Copyright (c) 2013 The WebRTC project authors. All Rights Reserved.
  *
  *  Use of this source code is governed by a BSD-style license
  *  that can be found in the LICENSE file in the root of the source
  *  tree. An additional intellectual property rights grant can be found
  *  in the file PATENTS.  All contributing project authors may
  *  be found in the AUTHORS file in the root of the source tree.
  */
 #ifndef WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURE_OPTIONS_H_
@@ skipping 54 matching lines @@
     use_update_notifications_ = use_update_notifications;
   }
 
   // Flag indicating if desktop effects (e.g. Aero) should be disabled when the
   // capturer is active. Currently used only on Windows.
   bool disable_effects() const { return disable_effects_; }
   void set_disable_effects(bool disable_effects) {
     disable_effects_ = disable_effects;
   }
 
+  // Flag that should be set if the consumer uses updated_region() and the
+  // capturer should try to provide correct updated_region() for the frames it
+  // generates (e.g. by comparing each frame with the previous one).

[Sergey Ulanov, 2016/09/15 23:51:35]

Currently this flag is ignored in WindowCapturer implementations. Please mention
it here and add a TODO to fix it.

[Hzj_jie, 2016/09/16 00:31:18]

Done.

+  bool detect_updated_region() const { return detect_updated_region_; }
+  void set_detect_updated_region(bool detect_updated_region) {
+    detect_updated_region_ = detect_updated_region;
+  }
+
 #if defined(WEBRTC_WIN)
   bool allow_use_magnification_api() const {
     return allow_use_magnification_api_;
   }
   void set_allow_use_magnification_api(bool allow) {
     allow_use_magnification_api_ = allow;
   }
   // Allowing directx based capturer or not, this capturer works on windows 7
   // with platform update / windows 8 or upper.
   bool allow_directx_capturer() const {
@@ skipping 18 matching lines @@
 #if defined(WEBRTC_WIN)
   bool allow_use_magnification_api_ = false;
   bool allow_directx_capturer_ = false;
 #endif
 #if defined(USE_X11)
   bool use_update_notifications_ = false;
 #else
   bool use_update_notifications_ = true;
 #endif
   bool disable_effects_ = true;
+  bool detect_updated_region_ = false;
 };
 
 }  // namespace webrtc
 
 #endif  // WEBRTC_MODULES_DESKTOP_CAPTURE_DESKTOP_CAPTURE_OPTIONS_H_