forked from mirrors/gecko-dev
f41a004bb1
MozReview-Commit-ID: 3oEvQe8zNJ0 --HG-- extra : rebase_source : b4c7d97ec1f701bbd1058ef40994f9874f6117cc
91 lines
3.4 KiB
C++
91 lines
3.4 KiB
C++
/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
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/* vim: set ts=8 sts=2 et sw=2 tw=80: */
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/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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#include "ScreenHelperWin.h"
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#include "mozilla/Logging.h"
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#include "nsTArray.h"
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#include "WinUtils.h"
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static LazyLogModule sScreenLog("WidgetScreen");
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namespace mozilla {
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namespace widget {
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BOOL CALLBACK
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CollectMonitors(HMONITOR aMon, HDC hDCScreen, LPRECT, LPARAM ioParam)
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{
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auto screens = reinterpret_cast<nsTArray<RefPtr<Screen>>*>(ioParam);
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BOOL success = FALSE;
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MONITORINFO info;
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info.cbSize = sizeof(MONITORINFO);
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success = ::GetMonitorInfoW(aMon, &info);
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if (!success) {
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MOZ_LOG(sScreenLog, LogLevel::Error, ("GetMonitorInfoW failed"));
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return TRUE; // continue the enumeration
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}
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double scale = WinUtils::LogToPhysFactor(aMon);
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DesktopToLayoutDeviceScale contentsScaleFactor;
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if (WinUtils::IsPerMonitorDPIAware()) {
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contentsScaleFactor.scale = 1.0;
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} else {
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contentsScaleFactor.scale = scale;
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}
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CSSToLayoutDeviceScale defaultCssScaleFactor(scale);
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LayoutDeviceIntRect rect(info.rcMonitor.left, info.rcMonitor.top,
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info.rcMonitor.right - info.rcMonitor.left,
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info.rcMonitor.bottom - info.rcMonitor.top);
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LayoutDeviceIntRect availRect(info.rcWork.left, info.rcWork.top,
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info.rcWork.right - info.rcWork.left,
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info.rcWork.bottom - info.rcWork.top);
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uint32_t pixelDepth = ::GetDeviceCaps(hDCScreen, BITSPIXEL);
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if (pixelDepth == 32) {
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// If a device uses 32 bits per pixel, it's still only using 8 bits
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// per color component, which is what our callers want to know.
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// (Some devices report 32 and some devices report 24.)
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pixelDepth = 24;
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}
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float dpi = WinUtils::MonitorDPI(aMon);
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MOZ_LOG(sScreenLog, LogLevel::Debug,
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("New screen [%d %d %d %d (%d %d %d %d) %d %f %f %f]",
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rect.x, rect.y, rect.width, rect.height,
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availRect.x, availRect.y, availRect.width, availRect.height,
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pixelDepth, contentsScaleFactor.scale, defaultCssScaleFactor.scale,
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dpi));
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auto screen = new Screen(rect, availRect,
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pixelDepth, pixelDepth,
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contentsScaleFactor, defaultCssScaleFactor,
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dpi);
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if (info.dwFlags & MONITORINFOF_PRIMARY) {
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// The primary monitor must be the first element of the screen list.
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screens->InsertElementAt(0, Move(screen));
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} else {
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screens->AppendElement(Move(screen));
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}
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return TRUE;
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}
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void
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ScreenHelperWin::RefreshScreens()
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{
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MOZ_LOG(sScreenLog, LogLevel::Debug, ("Refreshing screens"));
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AutoTArray<RefPtr<Screen>, 4> screens;
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HDC hdc = ::CreateDC(L"DISPLAY", nullptr, nullptr, nullptr);
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NS_ASSERTION(hdc,"CreateDC Failure");
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BOOL result = ::EnumDisplayMonitors(hdc, nullptr,
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(MONITORENUMPROC)CollectMonitors,
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(LPARAM)&screens);
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::DeleteDC(hdc);
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if (!result) {
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NS_WARNING("Unable to EnumDisplayMonitors");
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}
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ScreenManager& screenManager = ScreenManager::GetSingleton();
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screenManager.Refresh(Move(screens));
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}
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} // namespace widget
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} // namespace mozilla
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