Get Supported Screen Resolutions in XNA?
How do I get the screen resolutions in XNA? For example, when you change the screen resolution in windows and instead of giving you a list of all the possible options, it only gives you a few of them.
Just use this:
foreach (DisplayMode mode in GraphicsAdapter.DefaultAdapter.SupportedDisplayModes) {
//mode.whatever (and use any of avaliable information)
}
But it will give you some duplicates because it also takes into account the speed of the redial, so you can turn that applause on or do some filtering.
I'm not that modern XNA, but I didn't think there was a quick and easy feature. There is a way to use the old WinForms API, but since I personally don't want to reference it in other applications, the easiest way is to use native functions.
First, define your own construct to be used:
[StructLayout(LayoutKind.Sequential)]
internal struct DEVMODE
{
private const int CCHDEVICENAME = 0x20;
private const int CCHFORMNAME = 0x20;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]
public string dmDeviceName;
public short dmSpecVersion;
public short dmDriverVersion;
public short dmSize;
public short dmDriverExtra;
public int dmFields;
public int dmPositionX;
public int dmPositionY;
public int dmDisplayOrientation;
public int dmDisplayFixedOutput;
public short dmColor;
public short dmDuplex;
public short dmYResolution;
public short dmTTOption;
public short dmCollate;
[MarshalAs(UnmanagedType.ByValTStr, SizeConst = 0x20)]
public string dmFormName;
public short dmLogPixels;
public int dmBitsPerPel;
public int dmPelsWidth;
public int dmPelsHeight;
public int dmDisplayFlags;
public int dmDisplayFrequency;
public int dmICMMethod;
public int dmICMIntent;
public int dmMediaType;
public int dmDitherType;
public int dmReserved1;
public int dmReserved2;
public int dmPanningWidth;
public int dmPanningHeight;
}
We also need to define two functions of our own that we will use:
[DllImport("user32.dll")]
private static extern bool EnumDisplaySettings(string lpszDeviceName, int iModeNum, ref DEVMODE lpDevMode);
[DllImport("user32.dll")]
private static extern int GetSystemMetrics(int nIndex);
Finally, our functions list all screen resolutions and one to get the current screen resolution:
public static List<string> GetScreenResolutions()
{
var resolutions = new List<string>();
try
{
var devMode = new DEVMODE();
int i = 0;
while (EnumDisplaySettings(null, i, ref devMode))
{
resolutions.Add(string.Format("{0}x{1}", devMode.dmPelsWidth, devMode.dmPelsHeight));
i++;
}
resolutions = resolutions.Distinct(StringComparer.InvariantCulture).ToList();
}
catch (Exception ex)
{
Console.WriteLine("Could not get screen resolutions.");
}
return resolutions;
}
public static string GetCurrentScreenResolution()
{
int width = GetSystemMetrics(0x00);
int height = GetSystemMetrics(0x01);
return string.Format("{0}x{1}", width, height);
}