internal static void InitializeDpiHelperForWinforms()
{
if (s_isInitializeDpiHelperForWinforms)
{
return;
}
// initialize shared fields
Initialize();
if (OsVersion.IsWindows10_1607OrGreater)
{
// We are on Windows 10/1603 or greater, but we could still be DpiUnaware or SystemAware, so let's find that out...
var currentProcessId = SafeNativeMethods.GetCurrentProcessId();
IntPtr hProcess = SafeNativeMethods.OpenProcess(SafeNativeMethods.PROCESS_QUERY_INFORMATION, false, currentProcessId);
SafeNativeMethods.GetProcessDpiAwareness(hProcess, out CAPS.PROCESS_DPI_AWARENESS processDpiAwareness);
// Only if we're not, it makes sense to query for PerMonitorV2 awareness from now on, if needed.
if (!(processDpiAwareness == CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNAWARE ||
processDpiAwareness == CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE))
{
s_doesNeedQueryForPerMonitorV2Awareness = true;
}
}
if (IsScalingRequired || s_doesNeedQueryForPerMonitorV2Awareness)
{
s_isScalingRequirementMet = true;
}
s_isInitializeDpiHelperForWinforms = true;
}
internal static void InitializeDpiHelperForWinforms()
{
if (isInitializeDpiHelperForWinforms)
{
return;
}
// initialize shared fields
Initialize();
// We are in Windows 10/1603 or greater when this API is present.
if (ApiHelper.IsApiAvailable(ExternDll.User32, nameof(CommonUnsafeNativeMethods.GetThreadDpiAwarenessContext)))
{
// We are on Windows 10/1603 or greater all right, but we could still be DpiUnaware or SystemAware, so let's find that out...
var currentProcessId = SafeNativeMethods.GetCurrentProcessId();
IntPtr hProcess = SafeNativeMethods.OpenProcess(SafeNativeMethods.PROCESS_QUERY_INFORMATION, false, currentProcessId);
var result = SafeNativeMethods.GetProcessDpiAwareness(hProcess, out CAPS.PROCESS_DPI_AWARENESS processDpiAwareness);
// Only if we're not, it makes sense to query for PerMonitorV2 awareness from now on, if needed.
if (!(processDpiAwareness == CAPS.PROCESS_DPI_AWARENESS.PROCESS_DPI_UNAWARE ||
processDpiAwareness == CAPS.PROCESS_DPI_AWARENESS.PROCESS_SYSTEM_DPI_AWARE))
{
doesNeedQueryForPerMonitorV2Awareness = true;
}
}
if (IsScalingRequired || doesNeedQueryForPerMonitorV2Awareness)
{
isScalingRequirementMet = true;
}
isInitializeDpiHelperForWinforms = true;
}
/// <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);
}
/// <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);
}