Emulated retina mode displays incorrect tiles

[stefangaller]

What is the bug?

After upgrading from version 7.0.2 to 8.0.0, flutter_map is trying to fetch the wrong coordinates.

Flutter doctor:

Doctor summary (to see all details, run flutter doctor -v):
[✓] Flutter (Channel stable, 3.29.0, on macOS 15.3.1 24D70 darwin-arm64, locale en-AT)
[✓] Android toolchain - develop for Android devices (Android SDK version 35.0.0)
[✓] Xcode - develop for iOS and macOS (Xcode 16.2)
[✓] Chrome - develop for the web
[✓] Android Studio (version 2024.2)
[✓] IntelliJ IDEA Ultimate Edition (version 2024.3.3)
[✓] VS Code (version 1.91.0)
[✓] Connected device (5 available)
[✓] Network resources

How can we reproduce it?

FlutterMap(
  children: [
      TileLayer(
        retinaMode: true,
        urlTemplate: 'https://a.tile.opentopomap.org/{z}/{x}/{y}.png',
      )
  ],
),

Output Version 7.0.2

Output Version 8.0.0

Zoomed out it now looks like this:

Do you have a potential solution?

No response

[JaffaKetchup]

It should be done automatically, but can you please try setting zoomOffset to -1? If that doesn't work, try -2?

[stefangaller]

I did try with zoomOffset, which didn't seem to make any difference. I tried with -1, -2, +1, +2,...
Shouldn't it still work the same way with both version 7.0.2 and 8.0.0 ?
I now downgraded the package, and everything works as expected.

[JaffaKetchup]

Ok, thanks for trying! We'll look into it.

[JaffaKetchup]

This was introduced in 182c4fc, alongside unbounded horizontal scrolling.