4e7058e621
On Windows 10, the hidden taskbar won't be totally hidden, but having a 2 pixel margin on the screen. While a maximized app window will use up the full screen, there will be overlapping between a hidden taskbar and a maximized app window, which will impact window capture to that maximized window. If the target window doesn't support GDI methods well, the capture may be black (i.e. Chrome) or still (i.e. Word). Because there is no solid way to identify a hidden taskbar window, we have to make an exemption to the overlapping to a maximized window is 2-pixel X screen-width/height, which is thin enough to be noticed in the cropping result. Bug: chromium:838062 Change-Id: I9e0fbdf43b4445ca9fbbf5ed43bb266ae726a5b8 Reviewed-on: https://webrtc-review.googlesource.com/c/123261 Commit-Queue: Brave Yao <braveyao@webrtc.org> Reviewed-by: Jamie Walch <jamiewalch@chromium.org> Cr-Commit-Position: refs/heads/master@{#26755}
88 lines
3.5 KiB
C++
88 lines
3.5 KiB
C++
/*
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* Copyright (c) 2014 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 <shlobj.h>
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#include <windows.h>
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#include <wrl/client.h>
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#include "modules/desktop_capture/desktop_geometry.h"
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#include "rtc_base/constructor_magic.h"
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namespace webrtc {
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// Outputs the window rect. The returned DesktopRect is in system coordinates,
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// i.e. the primary monitor on the system always starts from (0, 0). This
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// function returns false if native APIs fail.
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bool GetWindowRect(HWND window, DesktopRect* result);
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// Outputs the window rect, with the left/right/bottom frame border cropped if
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// the window is maximized. |cropped_rect| is the cropped rect relative to the
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// desktop. |original_rect| is the original rect returned from GetWindowRect.
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// Returns true if all API calls succeeded. The returned DesktopRect is in
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// system coordinates, i.e. the primary monitor on the system always starts from
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// (0, 0). |original_rect| can be nullptr.
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//
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// TODO(zijiehe): Move this function to CroppingWindowCapturerWin after it has
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// been removed from MouseCursorMonitorWin.
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// This function should only be used by CroppingWindowCapturerWin. Instead a
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// DesktopRect CropWindowRect(const DesktopRect& rect)
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// should be added as a utility function to help CroppingWindowCapturerWin and
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// WindowCapturerWin to crop out the borders or shadow according to their
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// scenarios. But this function is too generic and easy to be misused.
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bool GetCroppedWindowRect(HWND window,
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DesktopRect* cropped_rect,
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DesktopRect* original_rect);
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// Retrieves the rectangle of the content area of |window|. Usually it contains
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// title bar and window client area, but borders or shadow are excluded. The
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// returned DesktopRect is in system coordinates, i.e. the primary monitor on
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// the system always starts from (0, 0). This function returns false if native
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// APIs fail.
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bool GetWindowContentRect(HWND window, DesktopRect* result);
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// Returns the region type of the |window| and fill |rect| with the region of
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// |window| if region type is SIMPLEREGION.
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int GetWindowRegionTypeWithBoundary(HWND window, DesktopRect* result);
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// Retrieves the size of the |hdc|. This function returns false if native APIs
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// fail.
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bool GetDcSize(HDC hdc, DesktopSize* size);
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// Retrieves whether the |window| is maximized and stores in |result|. This
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// function returns false if native APIs fail.
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bool IsWindowMaximized(HWND window, bool* result);
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typedef HRESULT(WINAPI* DwmIsCompositionEnabledFunc)(BOOL* enabled);
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class WindowCaptureHelperWin {
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public:
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WindowCaptureHelperWin();
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~WindowCaptureHelperWin();
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bool IsAeroEnabled();
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bool IsWindowChromeNotification(HWND hwnd);
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bool IsWindowIntersectWithSelectedWindow(
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HWND hwnd,
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HWND selected_hwnd,
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const DesktopRect& selected_window_rect);
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bool IsWindowOnCurrentDesktop(HWND hwnd);
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bool IsWindowVisibleOnCurrentDesktop(HWND hwnd);
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private:
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HMODULE dwmapi_library_;
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DwmIsCompositionEnabledFunc func_;
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// Only used on Win10+.
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Microsoft::WRL::ComPtr<IVirtualDesktopManager> virtual_desktop_manager_;
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RTC_DISALLOW_COPY_AND_ASSIGN(WindowCaptureHelperWin);
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};
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} // namespace webrtc
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