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/scoped_com_initializer.h" 13 #include "winrt_utils.h" 14 15 #pragma comment(lib, "runtimeobject.lib") 16 17 extern "C" { 18 19 __declspec(dllexport) float GetModernUIScale() { 20 base::win::ScopedCOMInitializer com_init; 21 Microsoft::WRL::ComPtr< 22 ABI::Windows::Graphics::Display::IDisplayPropertiesStatics> 23 display_properties; 24 if (SUCCEEDED(winrt_utils::CreateActivationFactory( 25 RuntimeClass_Windows_Graphics_Display_DisplayProperties, 26 display_properties.GetAddressOf()))) { 27 ABI::Windows::Graphics::Display::ResolutionScale resolution_scale; 28 if (SUCCEEDED(display_properties->get_ResolutionScale(&resolution_scale))) 29 return static_cast<float>(resolution_scale) / 100.0f; 30 } 31 return 1.0f; 32 } 33 34 } 35
