Scale problem with high screen resolution (2k, 4k)

[TheJustLink]

I use high DPI setting in app compatibility properties.

All icons small.

And this:

It is 0% load for GPU1/GPU2/CPU.

In original version, all icons have normal size, but tray icons not.

[pgrawehr]

I'm unfortunately unable to reproduce this issue. It looks all well for me, even with a high DPI setting. Which version did you try?

[TheJustLink]

I'm unfortunately unable to reproduce this issue. It looks all well for me, even with a high DPI setting. Which version did you try?

I use Release 0.9.7-alpha11.

If don't override the DPI in app settings, the quality will be low:

[pgrawehr]

You mean that the font is blurred? Yes, I have seen that, too. I have a clue on what causes this, but currently not much of an idea on how to avoid it. This needs investigating.

[gym404]

I think it's a common windows problem nowdays: https://blogs.windows.com/windowsdeveloper/2017/05/19/improving-high-dpi-experience-gdi-based-desktop-apps/

[T-Troll]

@pgrawehr here is how i fix it (as well as wrong scaling then app window moved to other scale monitor) in my tools:

void ResetDPIScale() {
	HKEY dpiKey;
	if (RegCreateKeyEx(HKEY_CURRENT_USER, TEXT("SOFTWARE\\Microsoft\\Windows NT\\CurrentVersion\\AppCompatFlags\\Layers"),
		0, NULL, REG_OPTION_NON_VOLATILE, KEY_ALL_ACCESS, NULL, &dpiKey, NULL) == ERROR_SUCCESS) {
		char pathBuffer[2048];
		GetModuleFileNameA(NULL, pathBuffer, 2047);
		const char setValue[] = "~ GDIDPISCALING DPIUNAWARE";
		RegSetValueEx(dpiKey, pathBuffer, 0, REG_SZ, (byte*)setValue, (DWORD)strlen(setValue));
		RegCloseKey(dpiKey);
	}
}

[pgrawehr]

That's quite a hack, by just disabling DPI scaling for the application from the operating system. There must be a setting in WinForms to fix this as well, however scaling is implemented quite sub-optimaly there. I just didn't have time to look into that so far.

[T-Troll]

Yes, a kind of hack.

I don't use WinForms/MFC, plain C instead, and this is the only way to make it work correctly (both set DPI Aware/DPI Unaware just add some other issues).
And this is the bug fix for issue "Windows add incorrect scaling settings then create app".

BTW, topic starter case is not worst - try to open app window at low-DPI monitor then move it to high-DPI. It will be a real pain.