/// <summary>
/// Checks if requested API is available in the give library that exist on the machine
/// </summary>
/// <param name="libName"> library name</param>
/// <param name="procName">function name</param>
/// <returns>return 'true' if given procName available in the installed libName(dll) </returns>
public static bool IsApiAvailable(string libName, string procName)
{
bool isAvailable = false;
if (!string.IsNullOrEmpty(libName) && !string.IsNullOrEmpty(procName))
{
var key = new Tuple <string, string>(libName, procName);
if (availableApis.TryGetValue(key, out isAvailable))
{
return(isAvailable);
}
//load library from system path.
IntPtr hmod = CommonUnsafeNativeMethods.LoadLibraryFromSystemPathIfAvailable(libName);
if (hmod != IntPtr.Zero)
{
IntPtr pfnProc = CommonUnsafeNativeMethods.GetProcAddress(new HandleRef(isAvailable, hmod), procName);
if (pfnProc != IntPtr.Zero)
{
isAvailable = true;
}
}
CommonUnsafeNativeMethods.FreeLibrary(new HandleRef(isAvailable, hmod));
availableApis[key] = isAvailable;
}
return(isAvailable);
}
private void ResetDpiAwarenessContextChanges()
{
if (dpiAwarenessScopeIsSet)
{
CommonUnsafeNativeMethods.TrySetThreadDpiAwarenessContext(originalAwareness);
dpiAwarenessScopeIsSet = 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 (OsVersion.IsWindows10_1607OrGreater)
{
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);
}
}
else if (OsVersion.IsWindows8_1OrGreater)
{
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);
}
}
else
{
// Available on Vista and higher
return(SafeNativeMethods.IsProcessDPIAware() ?
HighDpiMode.SystemAware :
HighDpiMode.DpiUnaware);
}
// We should never get here, except someone ported this with force to < Windows 7.
return(HighDpiMode.DpiUnaware);
}
public DpiAwarenessScope(System.Windows.Forms.DpiAwarenessContext awareness)
{
if (!EnableDpiChangedHighDpiImprovements)
{
return;
}
try
{
if (!CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(awareness, System.Windows.Forms.DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNSPECIFIED))
{
originalAwareness = CommonUnsafeNativeMethods.GetThreadDpiAwarenessContext();
if (!CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(originalAwareness, awareness) && !CommonUnsafeNativeMethods.TryFindDpiAwarenessContextsEqual(originalAwareness, System.Windows.Forms.DpiAwarenessContext.DPI_AWARENESS_CONTEXT_UNAWARE))
{
originalAwareness = CommonUnsafeNativeMethods.SetThreadDpiAwarenessContext(awareness);
dpiAwarenessScopeIsSet = true;
}
}
}
catch (EntryPointNotFoundException)
{
dpiAwarenessScopeIsSet = 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);
}
