text: /*
   *  Copyright (c) 2016 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.
   */
  
  #include "modules/desktop_capture/desktop_capturer.h"
  
  #include "modules/desktop_capture/desktop_capture_options.h"
  #include "modules/desktop_capture/desktop_capturer_differ_wrapper.h"
  
  namespace webrtc {
  
  DesktopCapturer::~DesktopCapturer() = default;
  
  void DesktopCapturer::SetSharedMemoryFactory(
      std::unique_ptr<SharedMemoryFactory> shared_memory_factory) {}
  
  void DesktopCapturer::SetExcludedWindow(WindowId window) {}
  
  bool DesktopCapturer::GetSourceList(SourceList* sources) {
    return true;
  }
  
  bool DesktopCapturer::SelectSource(SourceId id) {
    return false;
  }
  
  bool DesktopCapturer::FocusOnSelectedSource() {
    return false;
  }
  
  bool DesktopCapturer::IsOccluded(const DesktopVector& pos) {
    return false;
  }
  
  // static
  std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateWindowCapturer(
      const DesktopCaptureOptions& options) {
    std::unique_ptr<DesktopCapturer> capturer = CreateRawWindowCapturer(options);
    if (capturer && options.detect_updated_region()) {
      capturer.reset(new DesktopCapturerDifferWrapper(std::move(capturer)));
    }
  
    return capturer;
  }
  
  // static
  std::unique_ptr<DesktopCapturer> DesktopCapturer::CreateScreenCapturer(
      const DesktopCaptureOptions& options) {
    std::unique_ptr<DesktopCapturer> capturer = CreateRawScreenCapturer(options);
    if (capturer && options.detect_updated_region()) {
      capturer.reset(new DesktopCapturerDifferWrapper(std::move(capturer)));
    }
  
    return capturer;
  }
  
  #if defined(WEBRTC_USE_PIPEWIRE) || defined(USE_X11)
  bool DesktopCapturer::IsRunningUnderWayland() {
    const char* xdg_session_type = getenv("XDG_SESSION_TYPE");
    if (!xdg_session_type || strncmp(xdg_session_type, "wayland", 7) != 0)
      return false;
  
    if (!(getenv("WAYLAND_DISPLAY")))
      return false;
  
    return true;
  }
  #endif  // defined(WEBRTC_USE_PIPEWIRE) || defined(USE_X11)
  
  }  // namespace webrtc
  