diff options
Diffstat (limited to 'widget/windows/ScreenHelperWin.cpp')
| -rw-r--r-- | widget/windows/ScreenHelperWin.cpp | 157 |
1 files changed, 157 insertions, 0 deletions
diff --git a/widget/windows/ScreenHelperWin.cpp b/widget/windows/ScreenHelperWin.cpp new file mode 100644 index 0000000000..b3a48bae23 --- /dev/null +++ b/widget/windows/ScreenHelperWin.cpp @@ -0,0 +1,157 @@ +/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ +/* vim: set ts=8 sts=2 et sw=2 tw=80: */ +/* This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ + +#include "ScreenHelperWin.h" + +#include "mozilla/Logging.h" +#include "nsTArray.h" +#include "WinUtils.h" + +static mozilla::LazyLogModule sScreenLog("WidgetScreen"); + +namespace mozilla { +namespace widget { + +static void GetDisplayInfo(const char16ptr_t aName, + hal::ScreenOrientation& aOrientation, + uint16_t& aAngle, bool& aIsPseudoDisplay, + uint32_t& aRefreshRate) { + DISPLAY_DEVICEW displayDevice = {.cb = sizeof(DISPLAY_DEVICEW)}; + + // XXX Is the pseudodisplay status really useful? + aIsPseudoDisplay = + EnumDisplayDevicesW(aName, 0, &displayDevice, 0) && + (displayDevice.StateFlags & DISPLAY_DEVICE_MIRRORING_DRIVER); + + DEVMODEW mode = {.dmSize = sizeof(DEVMODEW)}; + if (!EnumDisplaySettingsW(aName, ENUM_CURRENT_SETTINGS, &mode)) { + return; + } + MOZ_ASSERT(mode.dmFields & DM_DISPLAYORIENTATION); + + aRefreshRate = mode.dmDisplayFrequency; + + // conver to default/natural size + if (mode.dmDisplayOrientation == DMDO_90 || + mode.dmDisplayOrientation == DMDO_270) { + DWORD temp = mode.dmPelsHeight; + mode.dmPelsHeight = mode.dmPelsWidth; + mode.dmPelsWidth = temp; + } + + bool defaultIsLandscape = mode.dmPelsWidth >= mode.dmPelsHeight; + switch (mode.dmDisplayOrientation) { + case DMDO_DEFAULT: + aOrientation = defaultIsLandscape + ? hal::ScreenOrientation::LandscapePrimary + : hal::ScreenOrientation::PortraitPrimary; + aAngle = 0; + break; + case DMDO_90: + aOrientation = defaultIsLandscape + ? hal::ScreenOrientation::PortraitPrimary + : hal::ScreenOrientation::LandscapeSecondary; + aAngle = 270; + break; + case DMDO_180: + aOrientation = defaultIsLandscape + ? hal::ScreenOrientation::LandscapeSecondary + : hal::ScreenOrientation::PortraitSecondary; + aAngle = 180; + break; + case DMDO_270: + aOrientation = defaultIsLandscape + ? hal::ScreenOrientation::PortraitSecondary + : hal::ScreenOrientation::LandscapePrimary; + aAngle = 90; + break; + default: + MOZ_ASSERT_UNREACHABLE("Unexpected angle"); + break; + } +} + +BOOL CALLBACK CollectMonitors(HMONITOR aMon, HDC, LPRECT, LPARAM ioParam) { + auto screens = reinterpret_cast<nsTArray<RefPtr<Screen>>*>(ioParam); + BOOL success = FALSE; + MONITORINFOEX info; + info.cbSize = sizeof(MONITORINFOEX); + success = ::GetMonitorInfoW(aMon, &info); + if (!success) { + MOZ_LOG(sScreenLog, LogLevel::Error, ("GetMonitorInfoW failed")); + return TRUE; // continue the enumeration + } + + double scale = WinUtils::LogToPhysFactor(aMon); + DesktopToLayoutDeviceScale contentsScaleFactor; + if (WinUtils::IsPerMonitorDPIAware()) { + contentsScaleFactor.scale = 1.0; + } else { + contentsScaleFactor.scale = scale; + } + CSSToLayoutDeviceScale defaultCssScaleFactor(scale); + LayoutDeviceIntRect rect(info.rcMonitor.left, info.rcMonitor.top, + info.rcMonitor.right - info.rcMonitor.left, + info.rcMonitor.bottom - info.rcMonitor.top); + LayoutDeviceIntRect availRect(info.rcWork.left, info.rcWork.top, + info.rcWork.right - info.rcWork.left, + info.rcWork.bottom - info.rcWork.top); + + HDC hDC = CreateDC(nullptr, info.szDevice, nullptr, nullptr); + if (!hDC) { + MOZ_LOG(sScreenLog, LogLevel::Error, ("CollectMonitors CreateDC failed")); + return TRUE; + } + uint32_t pixelDepth = ::GetDeviceCaps(hDC, BITSPIXEL); + DeleteDC(hDC); + if (pixelDepth == 32) { + // If a device uses 32 bits per pixel, it's still only using 8 bits + // per color component, which is what our callers want to know. + // (Some devices report 32 and some devices report 24.) + pixelDepth = 24; + } + + float dpi = WinUtils::MonitorDPI(aMon); + + auto orientation = hal::ScreenOrientation::None; + uint16_t angle = 0; + bool isPseudoDisplay = false; + uint32_t refreshRate = 0; + GetDisplayInfo(info.szDevice, orientation, angle, isPseudoDisplay, + refreshRate); + + MOZ_LOG(sScreenLog, LogLevel::Debug, + ("New screen [%s (%s) %d %u %f %f %f %d %d %d]", + ToString(rect).c_str(), ToString(availRect).c_str(), pixelDepth, + refreshRate, contentsScaleFactor.scale, defaultCssScaleFactor.scale, + dpi, isPseudoDisplay, orientation, angle)); + auto screen = MakeRefPtr<Screen>( + rect, availRect, pixelDepth, pixelDepth, refreshRate, contentsScaleFactor, + defaultCssScaleFactor, dpi, Screen::IsPseudoDisplay(isPseudoDisplay), + orientation, angle); + if (info.dwFlags & MONITORINFOF_PRIMARY) { + // The primary monitor must be the first element of the screen list. + screens->InsertElementAt(0, std::move(screen)); + } else { + screens->AppendElement(std::move(screen)); + } + return TRUE; +} + +void ScreenHelperWin::RefreshScreens() { + MOZ_LOG(sScreenLog, LogLevel::Debug, ("Refreshing screens")); + + AutoTArray<RefPtr<Screen>, 4> screens; + BOOL result = ::EnumDisplayMonitors( + nullptr, nullptr, (MONITORENUMPROC)CollectMonitors, (LPARAM)&screens); + if (!result) { + NS_WARNING("Unable to EnumDisplayMonitors"); + } + ScreenManager::Refresh(std::move(screens)); +} + +} // namespace widget +} // namespace mozilla |