Windows App Certification says Avalonia app is not DPI aware

[TangDave]

I'm testing my Avalonia app with the Windows App Certification Kit (prior to submitting to the Microsoft Store) and I notice the warning about DPIAwarenessValidation.

I added this section to the app.manifest file of my application:

      <windowsSettings>
        <dpiAware xmlns="http://schemas.microsoft.com/SMI/2005/WindowsSettings">true</dpiAware>
        <dpiAwareness xmlns="http://schemas.microsoft.com/SMI/2016/WindowsSettings">PerMonitorV2</dpiAwareness>
      </windowsSettings>	

Even with this section I still get the DPI warning. How did others with apps in the Microsoft Store get through this issue?

[maxkatz6]

Avalonia does set DpiAwareness with recommended APIs, SetProcessDpiAwarenessContext:

Avalonia/src/Windows/Avalonia.Win32/Win32Platform.cs

Lines 256 to 288 in be8edab

	// Ideally we'd set DPI awareness in the manifest but this doesn't work for netcoreapp2.0
	// apps as they are actually dlls run by a console loader. Instead we have to do it in code,
	// but there are various ways to do this depending on the OS version.
	var user32 = LoadLibrary("user32.dll");
	var method = GetProcAddress(user32, nameof(SetProcessDpiAwarenessContext));
	var dpiAwareness = Options.DpiAwareness;
	if (method != IntPtr.Zero)
	{
	if (dpiAwareness == Win32DpiAwareness.Unaware)
	{
	if (SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_UNAWARE))
	{
	return;
	}
	}
	else if (dpiAwareness == Win32DpiAwareness.SystemDpiAware)
	{
	if (SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_SYSTEM_AWARE))
	{
	return;
	}
	}
	else if (dpiAwareness == Win32DpiAwareness.PerMonitorDpiAware)
	{
	if (SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE_V2) ||
	SetProcessDpiAwarenessContext(DPI_AWARENESS_CONTEXT_PER_MONITOR_AWARE))
	{
	return;
	}
	}
	}

[TangDave]

Is this code something I should reproduce to get rid of the warning or is it already in Avalonia and a known issue with Windows App Certification?

[maxkatz6]

It's already in Avalonia.
You can write a ticket to the Windows Store support. They might have some idea what's wrong with app certification.

[StefanKoell]

Maybe MS is only looking for a specific entry in the manifest file? If so, you could try to provide a manifest with dpi awareness set and see if it passes:
https://learn.microsoft.com/en-us/windows/win32/hidpi/setting-the-default-dpi-awareness-for-a-process

[TangDave]

Tried that - no difference. Anyway, it’s only a warning so I’ll ignore it - just curious about what’s others did to work around it. Thanks.

…

On Sunday, December 15, 2024, StefanKoell ***@***.***> wrote: Maybe MS is only looking for a specific entry in the manifest file? If so, you could try to provide a manifest with dpi awareness set and see if it passes: https://learn.microsoft.com/en-us/windows/win32/hidpi/ setting-the-default-dpi-awareness-for-a-process — Reply to this email directly, view it on GitHub <#17769 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BIPRZOI7O7HQYAYXTILFAH32FVLTFAVCNFSM6AAAAABTTDSWAKVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNJXGEYTMNQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>

[TangDave]

Thanks - I’ll ignore it for now and take it up with Microsoft if it causes a problem.

…

On Saturday, December 14, 2024, Maxwell Katz ***@***.***> wrote: It's already in Avalonia. You can write a ticket to the Windows Store support. They might have some idea what's wrong with app certification. — Reply to this email directly, view it on GitHub <#17769 (reply in thread)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/BIPRZOKEQ2HW6T5VWZ26C2D2FST7RAVCNFSM6AAAAABTTDSWAKVHI2DSMVQWIX3LMV43URDJONRXK43TNFXW4Q3PNVWWK3TUHMYTCNJWHEYDINQ> . You are receiving this because you authored the thread.Message ID: ***@***.***>