47 lines
1.3 KiB
C++
47 lines
1.3 KiB
C++
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/*
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* Copyright (c) 2017 The WebRTC project authors. All Rights Reserved.
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*
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* Use of this source code is governed by a BSD-style license
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* that can be found in the LICENSE file in the root of the source
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* tree. An additional intellectual property rights grant can be found
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* in the file PATENTS. All contributing project authors may
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* be found in the AUTHORS file in the root of the source tree.
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*/
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#include "modules/desktop_capture/window_finder_win.h"
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#include <windows.h>
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#include <memory>
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namespace webrtc {
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WindowFinderWin::WindowFinderWin() = default;
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WindowFinderWin::~WindowFinderWin() = default;
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WindowId WindowFinderWin::GetWindowUnderPoint(DesktopVector point) {
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HWND window = WindowFromPoint(POINT{point.x(), point.y()});
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if (!window) {
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return kNullWindowId;
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}
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// The difference between GA_ROOTOWNER and GA_ROOT can be found at
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// https://groups.google.com/a/chromium.org/forum/#!topic/chromium-dev/Hirr_DkuZdw.
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// In short, we should use GA_ROOT, since we only care about the root window
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// but not the owner.
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window = GetAncestor(window, GA_ROOT);
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if (!window) {
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return kNullWindowId;
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}
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return reinterpret_cast<WindowId>(window);
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}
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// static
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std::unique_ptr<WindowFinder> WindowFinder::Create(
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const WindowFinder::Options& options) {
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return std::make_unique<WindowFinderWin>();
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}
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} // namespace webrtc
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