Handle DPI Awareness

Question

Handle DPI Awareness

Closed this issue 7 years ago · 11 comments

I have the following attribute specified in my project that utilizes WindowsFormsHost:
[assembly: System.Windows.Media.DisableDpiAwareness]
Which disables DpiAwareness and draws the screen as if it was unscaled (ex: 3840 × 2160 is drawn as if it was 1920 × 1080). I have this attribute applied because the screens are were designed prior to WinForms DPI Awareness features came about and the controls get all scrambled on screen without it.

However when I set FixAirspace=true the displayed image is 200% of the intended size. I assume that this is because while the drawn size is 1920 × 1080 the actual number of pixels to produce the image is 200% of that. Ergo, the image display is 200% of the intended size.

To reproduce you can set the Scaling factor in Display settings to something higher than 100% and watch it.

Answer 1 · 2018-01-21T03:01:22.000Z

Just tried with that attribute removed and it produced the same effect on HiDPI displays.

Answer 2 · 2018-01-22T19:10:44.000Z

Unfortunately, I don't have any high resolution monitors to test with and my laptop is only 1080p.

If I gave you a change, would you be able to test it out? It would just be a guess at this point.

Answer 3 · 2018-01-22T19:16:22.000Z

I can test patches if need be, but you could also go to your Display Settings (Win10 Settings->System->Display) and raise the Scaling to something like 150% percent, that would mimic the effect. Your screen would be smaller for a bit but you can revert when you finished fixing it.

Answer 4 · 2018-01-22T19:19:48.000Z

Great. That did it. I'll take a look and figure it out.

Answer 5 · 2018-01-22T21:14:06.000Z

OK. I think it's fixed now. Did some quick testing and it looked good on this end. I just updated it from NuGet too so if that's how you got it before, you should get the update in the next couple of hours.

Answer 6 · 2018-01-25T05:58:24.000Z

Works great now. 👍

Answer 7 · 2018-01-25T16:13:48.000Z

Awesome, I was hoping so, but I'd heard this stuff works differently on different versions of windows.

…

On Wed, Jan 24, 2018 at 11:58 PM, Adam Wilson ***@***.***> wrote: Works great now. 👍 — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#2 (comment)>, or mute the thread <https://github.com/notifications/unsubscribe-auth/AF90YlhiYw4P_jgp9lXhC8qBTDu-F_djks5tOBgAgaJpZM4RlrRb> .

Answer 8 · 2019-07-10T08:55:23.000Z

Btw, this does not work for me on win10 4k resolution with 150% scaling.

The same has been reported on stackoverflow as a comment to the resolution which is in place here:
https://stackoverflow.com/a/21450169/648563 (See comment from @nerdtron)

Answer 9 · 2019-07-10T18:03:13.000Z

So is there any known fix for this problem right now? I don't have a 4k display or laptop, so can't test it out myself.

Answer 10 · 2019-07-10T18:31:40.000Z

I saw some comment on SO which suggested to combine the solution you are using here with the accepted answer from the same SO post.

I can give it a try tomorrow at work and report back here if it works.

Answer 11 · 2019-07-10T18:47:32.000Z

That would be awesome. Thanks.

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On Wed, Jul 10, 2019 at 1:31 PM Philipp Feigl ***@***.***> wrote: I saw some comment on SO which suggested to combine the solution you are using here with the accepted answer from the same SO post. I can give it a try tomorrow at work and report back here if it works. — You are receiving this because you modified the open/close state. Reply to this email directly, view it on GitHub <#2?email_source=notifications&email_token=ABPXIYVDDFTCOP7GYM5NV3TP6YTIZA5CNFSM4EMWWRN2YY3PNVWWK3TUL52HS4DFVREXG43VMVBW63LNMVXHJKTDN5WW2ZLOORPWSZGODZULALY#issuecomment-510177327>, or mute the thread <https://github.com/notifications/unsubscribe-auth/ABPXIYWJNF4ZTMQY3WX5JFTP6YTIZANCNFSM4EMWWRNQ> .