public static bool Rotate(uint DisplayNumber, ScreenOrientation orientation)
{
if (DisplayNumber == 0)
{
throw new ArgumentOutOfRangeException("DisplayNumber", DisplayNumber, "First display is 1.");
}
bool result = false;
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
DEVMODE dm = new DEVMODE();
d.cb = Marshal.SizeOf(d);
if (!NativeMethods.EnumDisplayDevices(null, DisplayNumber - 1, ref d, 0))
{
throw new ArgumentOutOfRangeException("DisplayNumber", DisplayNumber, "Number is greater than connected displays.");
}
if (0 != NativeMethods.EnumDisplaySettings(
d.DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm))
{
if ((dm.dmDisplayOrientation + (int)orientation) % 2 == 1) // Need to swap height and width?
{
int temp = dm.dmPelsHeight;
dm.dmPelsHeight = dm.dmPelsWidth;
dm.dmPelsWidth = temp;
}
switch (orientation)
{
case ScreenOrientation.Angle90:
dm.dmDisplayOrientation = NativeMethods.DMDO_270;
break;
case ScreenOrientation.Angle180:
dm.dmDisplayOrientation = NativeMethods.DMDO_180;
break;
case ScreenOrientation.Angle270:
dm.dmDisplayOrientation = NativeMethods.DMDO_90;
break;
case ScreenOrientation.Angle0:
dm.dmDisplayOrientation = NativeMethods.DMDO_DEFAULT;
break;
default:
break;
}
DISP_CHANGE ret = NativeMethods.ChangeDisplaySettingsEx(
d.DeviceName, ref dm, IntPtr.Zero,
DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
result = ret == 0;
}
return(result);
}
public static bool Rotate(uint DisplayNumber, Orientations Orientation)
{
bool result = false;
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
DEVMODE dm = new DEVMODE();
d.cb = Marshal.SizeOf(d);
if (!Display.EnumDisplayDevices(null, DisplayNumber, ref d, 0))
{
throw new ArgumentOutOfRangeException("DisplayNumber", DisplayNumber, "Number is greater than connected displays.");
}
if (Display.EnumDisplaySettings(
d.DeviceName, Display.ENUM_CURRENT_SETTINGS, ref dm) != 0)
{
if ((dm.dmDisplayOrientation + (int)Orientation) % 2 == 1) // Need to swap height and width?
{
int temp = dm.dmPelsHeight;
dm.dmPelsHeight = dm.dmPelsWidth;
dm.dmPelsWidth = temp;
}
switch (Orientation)
{
case Orientations.DEGREES_CW_90:
dm.dmDisplayOrientation = 3;
break;
case Orientations.DEGREES_CW_180:
dm.dmDisplayOrientation = 2;
break;
case Orientations.DEGREES_CW_270:
dm.dmDisplayOrientation = 1;
break;
case Orientations.DEGREES_CW_0:
dm.dmDisplayOrientation = 0;
break;
default:
break;
}
DISP_CHANGE ret = Display.ChangeDisplaySettingsEx(
d.DeviceName, ref dm, IntPtr.Zero,
DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
result = ret == 0;
}
return(result);
}
public static bool Rotate(uint DisplayNumber, Orientations Orientation)
{
if (DisplayNumber == 0)
{
throw new ArgumentOutOfRangeException("DisplayNumber", DisplayNumber, "Invalid num of Display.");
}
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
DEVMODE dm = new DEVMODE();
d.cb = Marshal.SizeOf(d);
if (!NativeMethods.EnumDisplayDevices(null, DisplayNumber - 1, ref d, 0))
{
throw new ArgumentOutOfRangeException("DisplayNumber", DisplayNumber, "Too big num.");
}
if (0 != NativeMethods.EnumDisplaySettings(d.DeviceName, -1, ref dm))
{
if ((dm.dmDisplayOrientation + (int)Orientation) % 2 == 1)
{
int temp = dm.dmPelsHeight;
dm.dmPelsHeight = dm.dmPelsWidth;
dm.dmPelsWidth = temp;
}
switch (Orientation)
{
case Orientations.DEGREES_0:
dm.dmDisplayOrientation = 0;
break;
case Orientations.DEGREES_90:
dm.dmDisplayOrientation = 1;
break;
case Orientations.DEGREES_180:
dm.dmDisplayOrientation = 2;
break;
case Orientations.DEGREES_270:
dm.dmDisplayOrientation = 3;
break;
default:
break;
}
DISP_CHANGE ret = NativeMethods.ChangeDisplaySettingsEx(d.DeviceName, ref dm, IntPtr.Zero, DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
return(ret == 0);
}
return(false);
}
static void Aux(string[] args)
{
uint deviceID = 1; // zero origin (i.e. 1 means DISPLAY2)
DISPLAY_DEVICE d = new DISPLAY_DEVICE();
DEVMODE dm = new DEVMODE();
d.cb = Marshal.SizeOf(d);
d.StateFlags = DisplayDeviceStateFlags.MirroringDriver;
NativeMethods.EnumDisplayDevices(null, deviceID, ref d, 0);
/*
* if (0 != NativeMethods.EnumDisplaySettings(
* d.DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm))
* {
* int temp = dm.dmPelsHeight;
* dm.dmPelsHeight = dm.dmPelsWidth;
* dm.dmPelsWidth = temp;
*
*
*
* switch (dm.dmDisplayOrientation)
* {
* case NativeMethods.DMDO_DEFAULT:
* dm.dmDisplayOrientation = NativeMethods.DMDO_270;
* break;
* case NativeMethods.DMDO_270:
* dm.dmDisplayOrientation = NativeMethods.DMDO_180;
* break;
* case NativeMethods.DMDO_180:
* dm.dmDisplayOrientation = NativeMethods.DMDO_90;
* break;
* case NativeMethods.DMDO_90:
* dm.dmDisplayOrientation = NativeMethods.DMDO_DEFAULT;
* break;
* default:
* break;
* }
*/
DISP_CHANGE iRet = NativeMethods.ChangeDisplaySettingsEx(
d.DeviceName, ref dm, IntPtr.Zero,
DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
// if (iRet != DISP_CHANGE.Successful) handle error
// }
}
public static bool Rotate(string DeviceName, Orientations Orientation)
{
bool result = false;
DEVMODE dm = new DEVMODE();
if (0 != NativeMethods.EnumDisplaySettings(
DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref dm))
{
if ((dm.dmDisplayOrientation + (int)Orientation) % 2 == 1) // Need to swap height and width?
{
int temp = dm.dmPelsHeight;
dm.dmPelsHeight = dm.dmPelsWidth;
dm.dmPelsWidth = temp;
}
switch (Orientation)
{
case Orientations.DEGREES_CW_90:
dm.dmDisplayOrientation = NativeMethods.DMDO_270;
break;
case Orientations.DEGREES_CW_180:
dm.dmDisplayOrientation = NativeMethods.DMDO_180;
break;
case Orientations.DEGREES_CW_270:
dm.dmDisplayOrientation = NativeMethods.DMDO_90;
break;
case Orientations.DEGREES_CW_0:
dm.dmDisplayOrientation = NativeMethods.DMDO_DEFAULT;
break;
default:
break;
}
DISP_CHANGE ret = NativeMethods.ChangeDisplaySettingsEx(
DeviceName, ref dm, IntPtr.Zero,
DisplaySettingsFlags.CDS_UPDATEREGISTRY, IntPtr.Zero);
result = ret == 0;
}
return(result);
}
private static string GetMessageForCode(DISP_CHANGE code)
{
string message;
switch (code)
{
case DISP_CHANGE.Successful:
message = "Resolution updated.";
break;
case DISP_CHANGE.Restart:
message = "A restart is required for this resolution to take effect.";
break;
case DISP_CHANGE.BadMode:
message = $"resolution is not valid.";
break;
case DISP_CHANGE.BadDualView:
message = "The settings change was unsuccessful because system is DualView capable.";
break;
case DISP_CHANGE.BadFlags:
message = "An invalid set of flags was passed in.";
break;
case DISP_CHANGE.BadParam:
message =
"An invalid parameter was passed in. This can include an invalid flag or combination of flags.";
break;
case DISP_CHANGE.Failed:
message = "Resolution failed to update.";
break;
case DISP_CHANGE.NotUpdated:
message = "Unable to write settings to the registry.";
break;
default:
message = "Unknown return value from ChangeDisplaySettings API.";
break;
}
return(message);
}
public static DISP_CHANGE RotateAllScreens(Orientations orientation)
{
//if one fails, we return the result of that failed rotation
DISP_CHANGE result = DISP_CHANGE.Successful;
try
{
uint i = 0;
while (++i <= 64)
{
var tempResult = Rotate(i, orientation);
if (tempResult != DISP_CHANGE.Successful)
{
result = tempResult;
}
}
}
catch (ArgumentOutOfRangeException)
{
// Everything is fine, just reached the last display
}
return(result);
}
public static bool ChangeResolution(IntPtr windowHandle, Resolution res, bool permanent)
{
int i = 0;
DEVMODE cDm = new DEVMODE();
//cDm.dmDeviceName = new String(new char[32]);
//cDm.dmFormName = new String(new char[32]);
cDm.dmSize = (short)Marshal.SizeOf(cDm);
//FileLogger.Log("DEVMODE Size: {0}", Marshal.SizeOf(cDm));
Screen hostScreen = GetScreenFromHandle(windowHandle);
NativeMethods.EnumDisplaySettings(hostScreen.DeviceName, NativeMethods.ENUM_CURRENT_SETTINGS, ref cDm);
if (cDm.dmBitsPerPel == res.PixelDepth &&
cDm.dmPelsWidth == res.Width &&
cDm.dmPelsHeight == res.Height &&
cDm.dmDisplayFrequency == res.Rate &&
((cDm.dmDisplayFlags & NativeMethods.DM_INTERLACED) == NativeMethods.DM_INTERLACED) == res.Interlaced &&
cDm.dmDisplayFixedOutput == res.FixedOutput)
{
return(false);
}
DEVMODE dm = new DEVMODE();
//dm.dmDeviceName = new String(new char[32]);
//dm.dmFormName = new String(new char[32]);
dm.dmSize = (short)Marshal.SizeOf(dm);
while (0 != NativeMethods.EnumDisplaySettings(hostScreen.DeviceName, i, ref dm))
{
if (dm.dmBitsPerPel == res.PixelDepth &&
dm.dmPelsWidth == res.Width &&
dm.dmPelsHeight == res.Height &&
dm.dmDisplayFrequency == res.Rate &&
((dm.dmDisplayFlags & NativeMethods.DM_INTERLACED) == NativeMethods.DM_INTERLACED) == res.Interlaced &&
dm.dmDisplayFixedOutput == res.FixedOutput)
{
DISP_CHANGE iRet = NativeMethods.ChangeDisplaySettingsEx(hostScreen.DeviceName, ref dm, IntPtr.Zero, CDS.Test, IntPtr.Zero);
if (iRet == DISP_CHANGE.Successful)
{
if (permanent)
{
iRet = NativeMethods.ChangeDisplaySettingsEx(hostScreen.DeviceName, ref dm, IntPtr.Zero, CDS.UpdateRegistry, IntPtr.Zero);
}
else
{
iRet = NativeMethods.ChangeDisplaySettingsEx(hostScreen.DeviceName, ref dm, IntPtr.Zero, CDS.Dynamic, IntPtr.Zero);
//IntPtr nRes = IntPtr.Zero;
//try
//{
// nRes = Marshal.AllocHGlobal(Marshal.SizeOf(dm));
// Marshal.StructureToPtr(dm, nRes, true);
// iRet = NativeMethods.ChangeDisplaySettings(nRes, CDS.Dynamic);
//}
//finally
//{
// if (nRes != IntPtr.Zero)
// Marshal.FreeHGlobal(nRes);
//}
}
}
return(iRet == DISP_CHANGE.Successful);
}
i++;
}
return(false);
}
private static string GetMessageForCode(DISP_CHANGE code)
{
string message;
switch (code)
{
case DISP_CHANGE.Successful:
message = "Resolution updated.";
break;
case DISP_CHANGE.Restart:
message = "A restart is required for this resolution to take effect.";
break;
case DISP_CHANGE.BadMode:
message = $"resolution is not valid.";
break;
case DISP_CHANGE.BadDualView:
message = "The settings change was unsuccessful because system is DualView capable.";
break;
case DISP_CHANGE.BadFlags:
message = "An invalid set of flags was passed in.";
break;
case DISP_CHANGE.BadParam:
message =
"An invalid parameter was passed in. This can include an invalid flag or combination of flags.";
break;
case DISP_CHANGE.Failed:
message = "Resolution failed to update.";
break;
case DISP_CHANGE.NotUpdated:
message = "Unable to write settings to the registry.";
break;
default:
message = "Unknown return value from ChangeDisplaySettings API.";
break;
}
return message;
}