Getting Retina Screen Resolution on Macs with HiDPI in Unity

Question

I am making a custom Unity Editor GUI window and I just want it to stay and the exact center of the screen. Surprisingly, this is harder than I thought it would be on Macs.

This is my code:

....
windowRect.center = new Rect(0, 0, Screen.currentResolution.width, Screen.currentResolution.height).center;
....

The problem is, on a 5K iMac, which has a native resolution of 5120*2880, by default the macOS uses HiDPI to scale everything to 2560*1440. In Unity, Screen.currentResolution returns 5120*2880 without considering HiDPI scaling, but I need that sweet scaled resolution.

I've tried other functions as well. Display.main.systemWidth returns 1920 instead of 5120 or 2560.

Is there a way to do this? Or am I just out of luck? I am using Unity 2018.1.9f1.

Also, if there is a way to get the size of the whole Unity Editor Window(not the game window), I would be fine with it. Thanks in advance!

Answer 1

This in an old thread, but in case someone is still wondering, I found out that the highest resolution returned by Screen.resolutions on a retina device is the « magic » resolution. It’s the one that you see in the device settings as « Looks like X x Y ».

This is not mentioned in the doc as far as I could see, so I am not certain in can be relied upon in the long run, but it’s the case currently with Unity 2018.3.

Answer 2

Not quite the same as centre of the screen, but I was having a similar issue and solved it using:

EditorGUIUtility.GetMainWindowPosition().center;

Answer 3

In Editor, Screen.currentResolution show the resolution of game window. You can enable Maximize On Play to use the maximized window resolution.

And if you deploy to MacOS app, it should be the 5K resolution correctly.

Answer 4

I ran into the same issue. You may be looking for any of the following

EditorGUIUtility.pixelsPerPoint
EditorGUIUtility.PointsToPixels
EditorGUIUtility.PixelsToPoints