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/*
* (C) 2015-2016 see Authors.txt
*
* This file is part of MPC-HC.
*
* MPC-HC is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 3 of the License, or
* (at your option) any later version.
*
* MPC-HC is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*/
#include "stdafx.h"
#include "DpiHelper.h"
#include "WinapiFunc.h"
namespace
{
typedef enum MONITOR_DPI_TYPE {
MDT_EFFECTIVE_DPI = 0,
MDT_ANGULAR_DPI = 1,
MDT_RAW_DPI = 2,
MDT_DEFAULT = MDT_EFFECTIVE_DPI
} MONITOR_DPI_TYPE;
HRESULT WINAPI GetDpiForMonitor(HMONITOR hmonitor, MONITOR_DPI_TYPE dpiType, UINT* dpiX, UINT* dpiY);
}
DpiHelper::DpiHelper()
{
HDC hDC = ::GetDC(nullptr);
m_sdpix = GetDeviceCaps(hDC, LOGPIXELSX);
m_sdpiy = GetDeviceCaps(hDC, LOGPIXELSY);
::ReleaseDC(nullptr, hDC);
m_dpix = m_sdpix;
m_dpiy = m_sdpiy;
}
void DpiHelper::Override(HWND hWindow)
{
const WinapiFunc<decltype(GetDpiForMonitor)>
fnGetDpiForMonitor = { _T("Shcore.dll"), "GetDpiForMonitor" };
if (hWindow && fnGetDpiForMonitor) {
if (fnGetDpiForMonitor(MonitorFromWindow(hWindow, MONITOR_DEFAULTTONULL),
MDT_EFFECTIVE_DPI, (UINT*)&m_dpix, (UINT*)&m_dpiy) != S_OK) {
m_dpix = m_sdpix;
m_dpiy = m_sdpiy;
}
}
}
void DpiHelper::Override(int dpix, int dpiy)
{
m_dpix = dpix;
m_dpiy = dpiy;
}
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