axmol/cocos2dx/platform/win32/CCDevice.cpp

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#include "platform/CCDevice.h"
#include "CCStdC.h"
NS_CC_BEGIN
int Device::getDPI()
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{
static int dpi = -1;
if (dpi == -1)
{
HDC hScreenDC = GetDC( NULL );
int PixelsX = GetDeviceCaps( hScreenDC, HORZRES );
int MMX = GetDeviceCaps( hScreenDC, HORZSIZE );
ReleaseDC( NULL, hScreenDC );
dpi = 254.0f*PixelsX/MMX/10;
}
return dpi;
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}
NS_CC_END