/// <summary>
/// Tries to compare two DPIawareness context values. Return true if they were equal.
/// Return false when they are not equal or underlying OS does not support this API.
/// </summary>
/// <returns>true/false</returns>
public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB)
{
if (ApiHelper.IsApiAvailable(ExternDll.User32, "AreDpiAwarenessContextsEqual"))
{
return(AreDpiAwarenessContextsEqual(dpiContextA, dpiContextB));
}
return(false);
}
/// <summary>
/// Gets the DPI awareness.
/// </summary>
/// <returns>The thread's/process' current HighDpi mode</returns>
internal static HighDpiMode GetWinformsApplicationDpiAwareness()
{
// For Windows 10 RS2 and above
if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(CommonUnsafeNativeMethods.GetThreadDpiAwarenessContext)))
{
DpiAwarenessContext dpiAwareness = CommonUnsafeNativeMethods.GetThreadDpiAwarenessContext();
if (CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(dpiAwareness, DpiAwarenessContext.DPI_AWARENESS_CONTEXT_SYSTEM_AWARE))
{
return(HighDpiMode.SystemAware);
}
if (CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(dpiAwareness, DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNAWARE))
{
return(HighDpiMode.DpiUnaware);
}
if (CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(dpiAwareness, DpiAwarenessContext.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2))
{
return(HighDpiMode.PerMonitorV2);
}
if (CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(dpiAwareness, DpiAwarenessContext.DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE))
{
return(HighDpiMode.PerMonitor);
}
if (CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(dpiAwareness, DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNAWARE_GDISCALED))
{
return(HighDpiMode.DpiUnawareGdiScaled);
}
}
// For operating systems windows 8.1 to Windows 10 redstone 1 version.
else if (ApiHelper.IsApiAvailable(ExternDll.ShCore, nameof(SafeNativeMethods.GetProcessDpiAwareness)))
{
SafeNativeMethods.GetProcessDpiAwareness(IntPtr.Zero, out CAPS.PROCESS_DPI_AWARENESS processDpiAwareness);
switch (processDpiAwareness)
{
case CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNAWARE:
return(HighDpiMode.DpiUnaware);
case CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE:
return(HighDpiMode.SystemAware);
case CAPS.PROCESS_DPI_AWARENESS.PROCESS_PER_MONITOR_DPI_AWARE:
return(HighDpiMode.PerMonitor);
}
}
// For operating systems windows 7 to windows 8
else if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(SafeNativeMethods.IsProcessDPIAware)))
{
return(SafeNativeMethods.IsProcessDPIAware() ?
HighDpiMode.SystemAware :
HighDpiMode.DpiUnaware);
}
// We should never get here, except someone ported this with force to < Windows 7.
return(HighDpiMode.DpiUnaware);
}
/// <summary>
/// Enters a scope during which the current thread's DPI awareness context is set to
/// <paramref name="awareness"/>
/// </summary>
/// <param name="awareness">The new DPI awareness for the current thread</param>
/// <returns>An object that, when disposed, will reset the current thread's
/// DPI awareness to the value it had when the object was created.</returns>
public static IDisposable EnterDpiAwarenessScope(DpiAwarenessContext awareness)
{
return(new DpiAwarenessScope(awareness));
}
/// <summary>
/// Tries to compare two DPIawareness context values. Return true if they were equal.
/// Return false when they are not equal or underlying OS does not support this API.
/// </summary>
/// <returns>true/false</returns>
public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB)
{
if (OsVersion.IsWindows10_1607OrGreater)
{
return(AreDpiAwarenessContextsEqual(dpiContextA, dpiContextB));
}
return(false);
}
public static extern bool IsValidDpiAwarenessContext(DpiAwarenessContext dpiAwarenessContext);
/// <summary>
/// Tries to compare two DPIawareness context values. Return true if they were equal.
/// Return false when they are not equal or underlying OS does not support this API.
/// </summary>
/// <returns>true/false</returns>
public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB)
{
// User.32 AreDpiAwarenessContextsEqual API returns false when sent custom values like DPI_AWARENESS_CONTEXT_UNSPECIFIED, but it is true when both are equal to the same custom value.
if (dpiContextA == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED && dpiContextB == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED)
{
return(true);
}
if (ApiHelper.IsApiAvailable(ExternDll.User32, "AreDpiAwarenessContextsEqual"))
{
return(AreDpiAwarenessContextsEqual(dpiContextA, dpiContextB));
}
return(false);
}
public static extern DpiAwareness GetAwarenessFromDpiAwarenessContext(DpiAwarenessContext dpiAwarenessContext);
/// <summary>
/// Tries to compare two DPIawareness context values. Return true if they were equal.
/// Return false when they are not equal or underlying OS does not support this API.
/// </summary>
/// <returns>true/false</returns>
public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB)
{
if (dpiContextA == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED && dpiContextB == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED)
{
return(true);
}
if (OsVersion.IsWindows10_1607OrGreater)
{
return(AreDpiAwarenessContextsEqual(dpiContextA, dpiContextB));
}
return(false);
}
public static extern bool SetProcessDpiAwarenessContext(DpiAwarenessContext dpiAwarenessContext);
public static extern DpiAwarenessContext SetThreadDpiAwarenessContext(DpiAwarenessContext dpiAwarenessContext);
/// <summary>
/// Tries to compare two DPIawareness context values. Return true if they were equal.
/// Return false when they are not equal or underlying OS does not support this API.
/// </summary>
/// <returns>true/false</returns>
public static bool TryFindDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB)
{
if (dpiContextA == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED && dpiContextB == DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED)
{
return(true);
}
if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(CommonUnsafeNativeMethods.AreDpiAwarenessContextsEqual)))
{
return(AreDpiAwarenessContextsEqual(dpiContextA, dpiContextB));
}
return(false);
}
/// <summary>
/// Initializes a new instance of the <see cref="DpiAwarenessContextHandle"/> class.
/// </summary>
/// <param name="dpiAwarenessContext"><see cref="DpiAwarenessContext"/> value.</param>
public DpiAwarenessContextHandle(DpiAwarenessContext dpiAwarenessContext)
: this(new IntPtr((int)dpiAwarenessContext))
{
}
/// <inheritdoc/> public bool Equals([AllowNull] DpiAwarenessContext other) => this.Equals(WellKnownDpiAwarenessContextValues[other]);
internal static extern DpiAwarenessContext SetThreadDpiAwarenessContext(DpiAwarenessContext dpiContext);
public static extern uint GetDpiFromDpiAwarenessContext(DpiAwarenessContext dpiAwarenessContext);
internal static extern bool AreDpiAwarenessContextsEqual(DpiAwarenessContext dpiContextA, DpiAwarenessContext dpiContextB);
internal static extern bool SetProcessDpiAwarenessContext(DpiAwarenessContext dpiFlag);
