Xamarin.forms: [Bug] Bad scaling on UWP toolbar icons with FontImageSource (Forms 4.4.0)

[MitchBomcanhao]

Description

UWP Toolbar items have been slightly tweaked recently and display larger buttons with a slightly larger image. In my case, I use a FontImageSource and have noticed that the quality of the rendering of said image has worsened in this new version.

Steps to Reproduce

1. Add a toolbar item with a FontIconSource

Expected Behavior

The icon is rendered appropriately when the app runs.

Actual Behavior

The icon is badly scaled.

Basic Information

• Version with issue: 4.4.0.991265
• Last known good version: 4.2.0 (sort of), they're all bad but has gotten worse now.
• IDE: 16.3.9
• Platform Target Frameworks:
  
  
  
  • UWP: 18362
  
  

Screenshots

As you can see in the image above, the 4.2.0 rendering was small but actually displayed more detail - the 4.4.0 version is missing tons of detail even though it is larger.

For reference, I've added the exact same FontIconSource on a button image so that you can see how it looks like.

Reproduction Link

Issue8866.zip

Issue8866withMasterDetail.zip

[kingces95]

Could you please attach a zipped reproduction of the solution/project?

[MitchBomcanhao]

@kingces95

I've attached a couple of repro projects in the original post.
While making the repro project, I have found more issues with this, ie
The size of toolbar items is different if you use a MasterDetail or a regular NavigationPage. MasterDetail will make the toolbar items larger to fill the navigation bar, whereas the standard NavigationPage will not.

They both render the icons in a worse way in 4.4.0, though, so that bit is consistent.

4.2.0

4.4.0

[MitchBomcanhao]

Wondering if the issue is related to PR #8147

[nschoenberg]

@MitchBomcanhao I also have this issue since recent update of XF. I also have the problem that on minimizing the app and bringing it back to front hides the toolbar icon. Same for you?

[MitchBomcanhao]

@nschoenberg I've not seen that disappearing issue myself, but i've seen it reported here: is this what you're having? see: #10168

[nschoenberg]

@MitchBomcanhao Uh wow thanks for pointing me into direction of #10168 - Really sounds like the issue I have but I can't confirm the 15 seconds, it's less then that. But yea seems already fixed so I will try again