1、获取显示器的数量与尺寸
简单的获取屏幕的宽高
INT Width = GetSystemMetrics( SM_CXSCREEN );
INT Height = GetSystemMetrics( SM_CYSCREEN );
获取显示器的数量
INT Numbers = GetSystemMetrics( SM_CMONITORS );
获取所有显示器的逻辑外接矩形
INT Width = GetSystemMetrics( SM_CXVIRTUALSCREEN );
INT Height = GetSystemMetrics( SM_CYVIRTUALSCREEN );
2、枚举监视器并获取信息
///-----------------------------------------------------------------------------
struct Win32_MonitorInfo : public MONITORINFO
{
///-------------------------------------------------------------------------
inline Win32_MonitorInfo( void )
{
size_t Bytes = sizeof( *this );
memset( this , 0 , Bytes );
this->cbSize = Bytes;
}
};
///-----------------------------------------------------------------------------
BOOL CALLBACK MonitorEnum( HMONITOR hMonitor , HDC , LPRECT , LPARAM lParam )
{
Win32_MonitorInfo MonitorInfo;
if( GetMonitorInfo( hMonitor , &MonitorInfo ) )
{
const RECT& rcMonitor = MonitorInfo.rcMonitor;
STD_REINTERPRET_CAST( LPSIZE , lpSize , lParam );
LONG Height = rcMonitor.bottom - rcMonitor.top;
LONG Width = rcMonitor.right - rcMonitor.left;
lpSize->cy = STD_MAX( lpSize->cy , Height );
lpSize->cx = STD_MAX( lpSize->cx , Width );
}
return TRUE;
}
///-----------------------------------------------------------------------------
void MyMonitorEnumFunction( void )
{
SIZE Monitor = { 0 , 0 } , * lpSize = &Monitor;
STD_REINTERPRET_CAST( LPARAM , lParam , lpSize );
EnumDisplayMonitors( 0 , 0 , MonitorEnum , lParam );
// ...
}
注意该方法获取的监视器中给出的屏幕尺寸是逻辑尺寸，例如 4K 显示器设置了 150% 的放缩比例，那么获取的 rcMonitor 和 rcWork 里面的宽高是 2560 * 1440; 如果要获取真实的分辨率参数，那么可以使用下面的方法
3、非回调的枚举方法
///-----------------------------------------------------------------------------
struct Win32_DisplayDevice : public DISPLAY_DEVICE
{
///-------------------------------------------------------------------------
inline Win32_DisplayDevice( void )
{
size_t Bytes = sizeof( *this );
memset( this , 0 , Bytes );
this->cb = Bytes;
}
};
///-----------------------------------------------------------------------------
struct Win32_DeviceMode : public DEVMODE
{
///-------------------------------------------------------------------------
inline Win32_DeviceMode( void )
{
size_t Bytes = sizeof( *this );
memset( this , 0 , Bytes );
this->dmSize = Bytes;
}
};
///-----------------------------------------------------------------------------
void MyMonitorEnumFunction( void )
{
Win32_DisplayDevice DisplayDevice;
DWORD Width = 0 , Height = 0 , nDisplay = 0;
while( EnumDisplayDevices( NULL , nDisplay , &DisplayDevice , 0 ) )
{
Win32_DeviceMode DeviceMode;
LPCTSTR Name = DisplayDevice.DeviceName;
CONST DWORD dwSettings = ENUM_REGISTRY_SETTINGS;
if( EnumDisplaySettings( Name , dwSettings , &DeviceMode ) )
{
Height = STD_MAX( DeviceMode.dmPelsHeight , Height );
Width = STD_MAX( DeviceMode.dmPelsWidth , Width );
}
nDisplay++;
}
// ...
}