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-rw-r--r--widget/windows/ScreenHelperWin.cpp157
1 files changed, 157 insertions, 0 deletions
diff --git a/widget/windows/ScreenHelperWin.cpp b/widget/windows/ScreenHelperWin.cpp
new file mode 100644
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+++ b/widget/windows/ScreenHelperWin.cpp
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+/* -*- 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