зеркало из https://github.com/mozilla/gecko-dev.git
90 строки
3.3 KiB
C++
90 строки
3.3 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 mozilla::LazyLogModule sScreenLog("WidgetScreen");
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namespace mozilla {
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namespace widget {
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BOOL CALLBACK CollectMonitors(HMONITOR aMon, HDC, LPRECT, LPARAM ioParam) {
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auto screens = reinterpret_cast<nsTArray<RefPtr<Screen>>*>(ioParam);
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BOOL success = FALSE;
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MONITORINFOEX info;
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info.cbSize = sizeof(MONITORINFOEX);
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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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HDC hDC = CreateDC(nullptr, info.szDevice, nullptr, nullptr);
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if (!hDC) {
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MOZ_LOG(sScreenLog, LogLevel::Error, ("CollectMonitors CreateDC failed"));
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return TRUE;
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}
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uint32_t pixelDepth = ::GetDeviceCaps(hDC, BITSPIXEL);
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DeleteDC(hDC);
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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]", rect.X(),
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rect.Y(), rect.Width(), rect.Height(), availRect.X(), availRect.Y(),
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availRect.Width(), availRect.Height(), pixelDepth,
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contentsScaleFactor.scale, defaultCssScaleFactor.scale, dpi));
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auto screen = new Screen(rect, availRect, pixelDepth, pixelDepth,
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contentsScaleFactor, defaultCssScaleFactor, 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, std::move(screen));
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} else {
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screens->AppendElement(std::move(screen));
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}
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return TRUE;
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}
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void ScreenHelperWin::RefreshScreens() {
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MOZ_LOG(sScreenLog, LogLevel::Debug, ("Refreshing screens"));
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AutoTArray<RefPtr<Screen>, 4> screens;
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BOOL result = ::EnumDisplayMonitors(
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nullptr, nullptr, (MONITORENUMPROC)CollectMonitors, (LPARAM)&screens);
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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(std::move(screens));
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}
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} // namespace widget
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} // namespace mozilla
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