Correct unity banner height [Not solved]

Im having problems getting the unity ads banner height correctly on iphone 7+

There is an old thread on the topic, but its incorrect (?)
https://forum.unity.com/threads/solved-what-are-unity-banner-dimensions.578812/

It seems that on iphone 7+, unity renders the screen at
Screen.width = 1080
Screen.height = 1920
Screen.dpi = 401

Then scales the rendered image to 1242 x 2208 and adds the banner which is 150px high in this resolution.
(Then scales down this image to 1080 x 1920 again for native display, however device screendumps is still 1242x2208)

So the correct height of the banner in rendered 1080x1920 image is 130.43478260869566px

Calculated like this:
---------------------

float bannerPointHeight = 50.0f;
float retinaLevel = 3.0f;

float screenRenderedWidth = 1080.0f;
float screenScaledWidth = 1242.0f;

float screenPixelSize = bannerPointHeight * retinaLevel * (screenRenderedWidth / screenScaledWidth);

// I prefer the height to be bigger then the banner if half pixels
screenPixelSize = Mathf.Ceil(screenPixelSize);

Debug.Log(screenPixelSize);

---------------------

The problem is that i dont know how to find the 1242 width from unity, maybe its not even aware of this width?

The suggested

public float GetBannerHeight()
{
return Mathf.RoundToInt(50 * Screen.dpi / 160);
}

results in 125.3125px on iphone 7+ btw.

Is it possible to calculate the correct banner height, in a future proof manner, without special cases for all devices?
Im using unity 2019.2.0b2

---------------------

https://developer.apple.com/library...iOSDeviceCompatibility/Displays/Displays.html
Using the native scale factor multiplying the banner point height 50 * 2.608 = 130.4 which is correct.

Is the native scale factor available from unity?

 

Not possible?

 

I tried this
public float GetBannerHeight()
{
return Mathf.RoundToInt(50 * Screen.dpi / 160);
}

and divide it by the canvas scale factor

GetBannerHeight() / targetCanvas.scaleFactor;

Works well on my android device, maybe you can try this

 

Your solution works on most devices, except iphone 6+, 6s+, 7+ and 8+, possibly more

These plus models adds a downsampling step: renderedResolution / 1.15 = physicalPixels.
https://www.paintcodeapp.com/news/ultimate-guide-to-iphone-resolutions

So:

float downsample = 1.15f; // 1.0f on most devices
150.0f / downsample / targetCanvas.scaleFactor;

Gives the correct height, but I dont know how to find the 1.15 downsample for devices with these workings.

Unity with Metal on mentioned devices, renders 1080 x 1920 then then scales to 1242x2208 and adds the 150px high banner (50x3) then downscales to 1080 x 1920. (Or at least, banner height calculations suggest)

To figure out the downsample, I need to know either 1.15 or both resolutions ie 1242/1080 = 1.15

I could write special cases to each DeviceGeneration, but Id prefer a non specific solution.

 

This special case code would give the correct calculation on above mentioned iphone+ models, is the dpi wrong?

public float GetBannerHeight() // Should return 130 or non rounded 130.43478260869566px ion iPhone + models (150 / 1.15)
{
float screenDpi = 417.391304347826112f; // Instead of Screen.dpi which is reportad as 401
return Mathf.RoundToInt(50 * screenDpi / 160);
}

GetBannerHeight() / targetCanvas.scaleFactor;

 

I ran into this issue with Admob banner as well. The admob sdk only provide banner size in pixels on the virtual 1242x2208 screen. After searching around, I can not find any Unity API providing the native resolution scale factor.

Maybe I should write a native plugin or simply hard code it.

 

Hi sir, can I ask how you ended up solving this, if you remember?