public override IEnumerable<Display> GetActiveDisplays()
{
var displayDevices = GetDisplayDevices();
// find out resolution parameters for each display device.
foreach (var displayDevice in displayDevices.Where(
x => x.StateFlags.HasFlag(DisplayDeviceStateFlags.AttachedToDesktop)))
{
var mode = new DevMode {size = (short) Marshal.SizeOf(typeof (DevMode))};
// -1 means current RESOLUTION for specific display.
// you can enumerate through 0..N to find supported resolutions.
var success = XPWrapper.EnumDisplaySettings(displayDevice.DeviceName, -1, ref mode);
if (!success)
continue;
var origin = mode.position;
var resolution = mode.resolution;
var refreshRate = mode.displayFrequency;
var rotation = mode.displayOrientation;
yield return new Display
{
Resolution = resolution,
Origin = origin,
Rotation = rotation.ToScreenRotation(),
RefreshRate = refreshRate,
Name = displayDevice.DeviceName
};
}
}
/// <summary>
/// Reads the device information using XP native functions
/// and fills our specific structure.
/// </summary>
/// <param name="deviceName">Name of the device to get screen information from.</param>
/// <returns>Fills it with screen resolution</returns>
public void ReadDeviceInformation(string deviceName)
{
var vDevMode = new DevMode();
int rt = 0;// EnumDisplaySettings(deviceName, -1, ref vDevMode);
if(rt != 0)
{
/*
// This is not necessiarly true
// TODO: In future, replace that.
// Primary is not always DISPLAY1 AFAIK
scr.Primary = deviceName == "\\\\.\\DISPLAY1";
scr.BitsPerPixel = 1 << vDevMode.dmBitsPerPel;
scr.Bounds = new Rectangle(vDevMode.dmPositionX, vDevMode.dmPositionY,
vDevMode.dmPelsWidth, vDevMode.dmPelsHeight);
scr.WorkingArea = new Rectangle(vDevMode.dmPositionX, vDevMode.dmPositionY,
vDevMode.dmPelsWidth, vDevMode.dmPelsHeight);
scr.DeviceName = vDevMode.dmDeviceName;*/
}
}
public static extern bool EnumDisplaySettingsEx(string lpszDeviceName, int iModeNum, ref DevMode lpDevMode, uint dwFlags);
public static extern bool EnumDisplaySettings(string deviceName, int modeNum, ref DevMode devMode);
private static extern DispChange ChangeDisplaySettingsEx(string deviceName, ref DevMode lpDevMode,
IntPtr hwnd, int dwflags, IntPtr lParam);
public static extern int ChangeDisplaySettings(ref DevMode devMode, int flags);