# Avalonia 12.1.2

- Product: Avalonia (https://whatsnew.fyi/product/avalonia)
- Vendor: AvaloniaUI
- Date: 2026-09-02
- Version: 12.1.2
- Original notes: https://github.com/AvaloniaUI/Avalonia/releases/tag/12.1.2
- Permalink: https://whatsnew.fyi/product/avalonia/releases/12.1.2

What's New is an index, not a publisher: every entry below links to the vendor's own release notes, which are the authoritative source. Entries are labelled where they are hand-curated sample data, pre-releases, or drawn from a secondary source such as a developer blog.

Reuse: the summaries, labels and curation here are © What's New. Quote freely with attribution and a link back; wholesale republication of the corpus is not permitted — terms: https://whatsnew.fyi/terms. The vendors' own release notes remain their publishers'.

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- **changed** — Preserve current Animation progress if SpeedRatio or PlaybackDirection changes
- **added** — Add TextInputOptions.HintLocales
- **added** — Implement VerticalContentAlignment for DatePicker and TimePicker
- **added** — Add :empty pseudoclass for ContentControl
- **changed** — Propagate Popup.IsHitTestVisible to IPopupImpl to skip hit-testing popups on the OS level if available
- **added** — Add Content attribute to ContentPresenter
- **changed** — Don't build the selected text just to check whether a selection exists
- **changed** — Enable picking .app-packages as a folder on macOS
- **changed** — Select a KMS-capable DRM card automatically on Linux
- **added** — Support TextInputOptions.IsSensitive and ContentType Pin on Android
- **added** — Implement VoiceOver support on iOS
- **fixed** — Fix GeometryBuilder.DrawRoundedCornersRectangle for Rect
- **fixed** — Fix Vulkan image layout in GPU interop
- **fixed** — Fix ServerCompositionDrawingSurface orphaning GPU snapshots when an update is processed after Dispose
- **fixed** — Fix Loaded event processing after a handler throws
- **fixed** — Keep transform playback in sync when hidden
- **fixed** — Fix vector geometry anti-aliasing regression by making stencil buffers opt-in
- **fixed** — Fix AccessKeyHandler when no descendant control has focus
- **fixed** — Ensure that ActualThemeVariant always has a proper value
- **fixed** — Fix init order of SetupWithClassicDesktopLifetime

##### What's Changed

###### Enhancements

- Core – Preserve current `Animation` progress if `SpeedRatio` or `PlaybackDirection` changes by @timiimit-tam in https://github.com/AvaloniaUI/Avalonia/pull/19830
- Core – Add `TextInputOptions.HintLocales` by @kerams in https://github.com/AvaloniaUI/Avalonia/pull/21528
- Controls – Implement `VerticalContentAlignment` for `DatePicker` and `TimePicker` by @JoaoMSSCruz in https://github.com/AvaloniaUI/Avalonia/pull/21464
- Controls – Add `:empty` pseudoclass for `ContentControl` by @zrt2399 in https://github.com/AvaloniaUI/Avalonia/pull/21829
- Controls – Propagate `Popup.IsHitTestVisible` to `IPopupImpl` to skip hit-testing popups on the OS level if available by @kekekeks in https://github.com/AvaloniaUI/Avalonia/pull/21916
- Controls – Add `Content` attribute to `ContentPresenter` by @zrt2399 in https://github.com/AvaloniaUI/Avalonia/pull/21997
- Controls – Don't build the selected text just to check whether a selection exists by @NathanDrake2406 in https://github.com/AvaloniaUI/Avalonia/pull/22100
- macOS – Enable picking `.app`-packages as a folder by @jakobhellermann in https://github.com/AvaloniaUI/Avalonia/pull/21925
- Linux – Select a KMS-capable DRM card automatically by @Illustar0 in https://github.com/AvaloniaUI/Avalonia/pull/21923
- Android – Support `TextInputOptions.IsSensitive` and `ContentType` Pin by @dariostrm in https://github.com/AvaloniaUI/Avalonia/pull/22110
- iOS – Implement VoiceOver support by @IsaMorphic in https://github.com/AvaloniaUI/Avalonia/pull/18016

###### Fixes

- Core – Fix `GeometryBuilder.DrawRoundedCornersRectangle` for `Rect` by @robloo in https://github.com/AvaloniaUI/Avalonia/pull/21482
- Core – Fix Vulkan image layout in GPU interop by @nateglasser in https://github.com/AvaloniaUI/Avalonia/pull/21787
- Core – Fix `ServerCompositionDrawingSurface` orphaning GPU snapshots when an update is processed after `Dispose` by @ddunham121 in https://github.com/AvaloniaUI/Avalonia/pull/21876
- Core – Fix `Loaded` event processing after a handler throws by @NathanDrake2406 in https://github.com/AvaloniaUI/Avalonia/pull/21877
- Core – Keep transform playback in sync when hidden by @NathanDrake2406 in https://github.com/AvaloniaUI/Avalonia/pull/21896
- Core – Fix vector geometry anti-aliasing regression by making stencil buffers opt-in by @NathanDrake2406 in https://github.com/AvaloniaUI/Avalonia/pull/21899
- Core – Fix `AccessKeyHandler` when no descendant control has focus by @AutumnYuanc in https://github.com/AvaloniaUI/Avalonia/pull/21920
- Core – Ensure that `ActualThemeVariant` always has a proper value by @MrJul in https://github.com/AvaloniaUI/Avalonia/pull/21930
- Core – Fix init order of `SetupWithClassicDesktopLifetime` by @MrJul in https://github.com/AvaloniaUI/Avalonia/pull/21954
- Core – Raise `TopLevel.Closed` from managed `Dispose` paths by @kekekeks in https://github.com/AvaloniaUI/Avalonia/pull/22045
- Core – Ignore default ignorable codepoints in font fallback by @Gillibald in https://github.com/AvaloniaUI/Avalonia/pull/22059
- Core – Justify word gaps that fall on a run boundary by @Gillibald in https://github.com/AvaloniaUI/Avalonia/pull/22065
- Core – Snap a right-to-left buffer split to the cluster boundary by @Gillibald in https://github.com/AvaloniaUI/Avalonia/pull/22066
- Core – Do not shape the space after fallback text with the fallback font by @Gillibald in https://github.com/AvaloniaUI/Avalonia/pull/22067
- Core – Use effective capturer (which can be recognizer) for `PlatformCapture` by @kekekeks in https://github.com/AvaloniaUI/Avalonia/pull/22076
- Core – Short-circuit the binding chain on a null-conditional operator by @grokys in https://github.com/AvaloniaUI/Avalonia/pull/22082
- Core – Fix dispatcher frame capturing wrong dispatcher by @kekekeks in https://github.com/AvaloniaUI/Avalonia/pull/22086
- Core – Fix memory leak when binding to observables by @grokys in https://github.com/Avalon

_[Truncated at 4000 characters — full notes: https://github.com/AvaloniaUI/Avalonia/releases/tag/12.1.2]_