/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
/* 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 "nsIBaseWindow.h"
#include "nsDeviceContext.h"
#include "mozilla/LookAndFeel.h"

using namespace mozilla;

CSSToLayoutDeviceScale nsIBaseWindow::UnscaledDevicePixelsPerCSSPixel() {
  CSSToLayoutDeviceScale widgetScale(GetWidgetCSSToDeviceScale());
  int32_t apd =
      nsDeviceContext::ComputeAppUnitsPerDevPixelForWidgetScale(widgetScale);
  apd = nsDeviceContext::ApplyFullZoomToAPD(
      apd, LookAndFeel::SystemZoomSettings().mFullZoom);
  return CSSToLayoutDeviceScale(double(AppUnitsPerCSSPixel()) / double(apd));
}