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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 {
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);
MOZ_LOG(sScreenLog, LogLevel::Debug,
("New screen [%d %d %d %d (%d %d %d %d) %d %f %f %f]", rect.X(),
rect.Y(), rect.Width(), rect.Height(), availRect.X(), availRect.Y(),
availRect.Width(), availRect.Height(), pixelDepth,
contentsScaleFactor.scale, defaultCssScaleFactor.scale, dpi));
auto screen = new Screen(rect, availRect, pixelDepth, pixelDepth,
contentsScaleFactor, defaultCssScaleFactor, dpi);
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& screenManager = ScreenManager::GetSingleton();
screenManager.Refresh(std::move(screens));
}
} // namespace widget
} // namespace mozilla