1// Copyright 2013 The Chromium Authors. All rights reserved.
2// Use of this source code is governed by a BSD-style license that can be
3// found in the LICENSE file.
4
5#include "stdafx.h"
6
7#include <windows.h>
8#include <wrl\implements.h>
9#include <wrl\wrappers\corewrappers.h>
10#include <windows.foundation.h>
11#include <windows.graphics.display.h>
12#include "base/win/windows_version.h"
13#include "ui/gfx/win/dpi.h"
14#include "winrt_utils.h"
15
16float GetModernUIScale() {
17  if (base::win::GetVersion() >= base::win::VERSION_WIN8) {
18    Microsoft::WRL::ComPtr<
19        ABI::Windows::Graphics::Display::IDisplayPropertiesStatics>
20        display_properties;
21    if (SUCCEEDED(winrt_utils::CreateActivationFactory(
22        RuntimeClass_Windows_Graphics_Display_DisplayProperties,
23        display_properties.GetAddressOf()))) {
24      ABI::Windows::Graphics::Display::ResolutionScale resolution_scale;
25      if (SUCCEEDED(display_properties->get_ResolutionScale(&resolution_scale)))
26        return static_cast<float>(resolution_scale) / 100.0f;
27    }
28  }
29  return gfx::GetDPIScale();
30}
31