获取windows操作系统分辨率(DPI)

最新推荐文章于 2025-03-09 17:58:54 发布

diaoren5930

最新推荐文章于 2025-03-09 17:58:54 发布

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文章标签：操作系统

原文链接：http://www.cnblogs.com/freemindblog/p/5704607.html

版权

// ScreenDPI.cpp : Defines the entry point for the console application.
//

#include " stdafx.h "
#include <iostream>
#include <windows.h>
#include <math.h>
using namespace std;

// 1毫米=0.039370078740157英寸
#define INCH 0.03937

float GetDPI()
{
    HDC hdcScreen;
    hdcScreen = CreateDC(L " DISPLAY ", NULL, NULL, NULL);

     int iX = GetDeviceCaps(hdcScreen, HORZRES);     // pixel
     int iY = GetDeviceCaps(hdcScreen, VERTRES);     // pixel
     int iPhsX = GetDeviceCaps(hdcScreen, HORZSIZE);     // mm
     int iPhsY = GetDeviceCaps(hdcScreen, VERTSIZE);     // mm

     if (NULL != hdcScreen)
    {
        DeleteDC(hdcScreen);
    }
     float iTemp = iPhsX * iPhsX + iPhsY * iPhsY;
     float fInch = sqrt(iTemp) * INCH ;
    iTemp = iX * iX + iY * iY;
     float fPixel = sqrt(iTemp);

     float iDPI = fPixel / fInch;     // dpi pixel/inch
    cout<< " DPI: "<<iDPI<<endl;
     return iDPI;
}

int _tmain( int argc, _TCHAR* argv[])
{
    GetDPI();
    system( " pause ");
     return 0;
}

转载于:https://www.cnblogs.com/freemindblog/p/5704607.html