PureBasic Forum

DPI aware scaling bug, important 5.73

While working on the new FontMaster I suddenly noticed that the
OS automatic upscaling did no longer work for scales over 100%.
Restarting the OS and reinstalling PB does not help.

Reducing the code down to pure OpenWindow did not help either.
Copying the code into a new file eliminates the problem.
Then you have two exactly same small codes.
Upscaling works with one but not with the other.

PB does not forget the defective file, the mechanism behind it is unknown to me.
If you create exe from both files, the error is gone.

Another method to remove the error you can see in the gif.
The code is started in the degugger, then it is started a second time with the separate debugger.
By this second start with the separate debugger the error is removed.

I athink that the error is triggered when a code is started with a windowed screen in DPI aware.

Now I know why many people have problems with DPI aware and want the constant to prompt them to switch on DPI aware.

If DPI aware is implemented correctly it does not matter if it is switched on in the compiler or not, the sizes are always the same.

But with this error you can drive everyone almost crazy.

Most people are unlikely to recognise the cause, as they are not familiar with DPI aware

I made a little code,
A very strange thing, but very bad.
I have seen this error several times, with different codes, but I have never been able to find the cause and a way to remove.
It probably has something to do with the debugger..

If you cannot compare the results it is very difficult and annoying to program DPI aware.
Especially such tools must run without problems with and without DPI aware, otherwise they cannot
be used in any other codes.

Gif above updated to simplest code using.

Using your code posted I cannot reproduce your issue.
The window is displayed the same size regardless of DPI aware settings or whether standalone debugger is used.

Thanks Paul.
I have now reset Windows to my last OS backup and restored the latest updates.
At the moment the bug is gone.
It seems that the automatic import of the latest OS updates has broken something on the system.
If it happens again I will post again.
In any case a very bad thing and absolutely strange.
If you would not see the gif, you would not believe it.

Saki, Nothing to do with your DPI issue, just asking which software you used in the demo on your post.

Hi C87, here :
https://www.purebasic.fr/english/viewtopic.php?f=12&t=76338&p=562401#p562401

Hello again Saki, I maybe wasn't so clear.
I was referring to the demo-type application that you use to animate the initial posts.
In the page you show it as if you are operating the screen in the post.
Sorry about that but many thanks in advance

Hi, no problem, look here :
https://www.screentogif.com/