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Release 0.31.0 - Scene container, improved rendering quality
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Lucas Meurer
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CHANGELOG.md
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CHANGELOG.md
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Changes since the last release can be found at <https://github.com/emilk/egui/compare/latest...HEAD> or by running the `scripts/generate_changelog.py` script.
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## 0.31.0 - 2025-02-04 - Scene container, improved rendering quality
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### Highlights ✨
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#### Scene container
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This release adds the `Scene` container to egui. It is a pannable, zoomable canvas that can contain `Widget`s and child `Ui`s.
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This will make it easier to e.g. implement a graph editor.
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#### Clearer, pixel perfect rendering
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The tessellator has been updated for improved rendering quality and better performance. It will produce fewer vertices
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and shapes will have less overdraw. We've also defined what `CornerRadius` (previously `Rounding`) means.
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We've also added a tessellator test to the [demo app](https://www.egui.rs/), where you can play around with different
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values to see what's produced:
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https://github.com/user-attachments/assets/adf55e3b-fb48-4df0-aaa2-150ee3163684
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Check the [PR](https://github.com/emilk/egui/pull/5669) for more details.
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#### `CornerRadius`, `Margin`, `Shadow` size reduction
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In order to pave the path for more complex and customizable styling solutions, we've reduced the size of
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`CornerRadius`, `Margin` and `Shadow` values to `i8` and `u8`.
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### Migration guide
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- Add a `StrokeKind` to all your `Painter::rect` calls [#5648](https://github.com/emilk/egui/pull/5648)
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- `StrokeKind::default` was removed, since the 'normal' value depends on the context [#5658](https://github.com/emilk/egui/pull/5658)
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- You probably want to use `StrokeKind::Inside` when drawing rectangles
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- You probably want to use `StrokeKind::Middle` when drawing open paths
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- Rename `Rounding` to `CornerRadius` [#5673](https://github.com/emilk/egui/pull/5673)
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- `CornerRadius`, `Margin` and `Shadow` have been updated to use `i8` and `u8` [#5563](https://github.com/emilk/egui/pull/5563), [#5567](https://github.com/emilk/egui/pull/5567), [#5568](https://github.com/emilk/egui/pull/5568)
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- Remove the .0 from your values
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- Cast dynamic values with `as i8` / `as u8` or `as _` if you want Rust to infer the type
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- Rust will do a 'saturating' cast, so if your `f32` value is bigger than `127` it will be clamped to `127`
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- `RectShape` parameters changed [#5565](https://github.com/emilk/egui/pull/5565)
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- Prefer to use the builder methods to create it instead of initializing it directly
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- `Frame` now takes the `Stroke` width into account for its sizing, so check all views of your app to make sure they still look right.
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Read the [PR](https://github.com/emilk/egui/pull/5575) for more info.
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### ⭐ Added
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* Add `egui::Scene` for panning/zooming a `Ui` [#5505](https://github.com/emilk/egui/pull/5505) by [@grtlr](https://github.com/grtlr)
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* Animated WebP support [#5470](https://github.com/emilk/egui/pull/5470) by [@Aely0](https://github.com/Aely0)
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* Improve tessellation quality [#5669](https://github.com/emilk/egui/pull/5669) by [@emilk](https://github.com/emilk)
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* Add `OutputCommand` for copying text and opening URL:s [#5532](https://github.com/emilk/egui/pull/5532) by [@emilk](https://github.com/emilk)
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* Add `Context::copy_image` [#5533](https://github.com/emilk/egui/pull/5533) by [@emilk](https://github.com/emilk)
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* Add `WidgetType::Image` and `Image::alt_text` [#5534](https://github.com/emilk/egui/pull/5534) by [@lucasmerlin](https://github.com/lucasmerlin)
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* Add `epaint::Brush` for controlling `RectShape` texturing [#5565](https://github.com/emilk/egui/pull/5565) by [@emilk](https://github.com/emilk)
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* Implement `nohash_hasher::IsEnabled` for `Id` [#5628](https://github.com/emilk/egui/pull/5628) by [@emilk](https://github.com/emilk)
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* Add keys for `!`, `{`, `}` [#5548](https://github.com/emilk/egui/pull/5548) by [@Its-Just-Nans](https://github.com/Its-Just-Nans)
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* Add `RectShape::stroke_kind ` to control if stroke is inside/outside/centered [#5647](https://github.com/emilk/egui/pull/5647) by [@emilk](https://github.com/emilk)
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### 🔧 Changed
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* ⚠️ `Frame` now includes stroke width as part of padding [#5575](https://github.com/emilk/egui/pull/5575) by [@emilk](https://github.com/emilk)
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* Rename `Rounding` to `CornerRadius` [#5673](https://github.com/emilk/egui/pull/5673) by [@emilk](https://github.com/emilk)
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* Require a `StrokeKind` when painting rectangles with strokes [#5648](https://github.com/emilk/egui/pull/5648) by [@emilk](https://github.com/emilk)
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* Round widget coordinates to even multiple of 1/32 [#5517](https://github.com/emilk/egui/pull/5517) by [@emilk](https://github.com/emilk)
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* Make all lines and rectangles crisp [#5518](https://github.com/emilk/egui/pull/5518) by [@emilk](https://github.com/emilk)
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* Tweak window resize handles [#5524](https://github.com/emilk/egui/pull/5524) by [@emilk](https://github.com/emilk)
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### 🔥 Removed
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* Remove `egui::special_emojis::TWITTER` [#5622](https://github.com/emilk/egui/pull/5622) by [@emilk](https://github.com/emilk)
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* Remove `StrokeKind::default` [#5658](https://github.com/emilk/egui/pull/5658) by [@emilk](https://github.com/emilk)
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### 🐛 Fixed
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* Use correct minimum version of `profiling` crate [#5494](https://github.com/emilk/egui/pull/5494) by [@lucasmerlin](https://github.com/lucasmerlin)
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* Fix interactive widgets sometimes being incorrectly marked as hovered [#5523](https://github.com/emilk/egui/pull/5523) by [@emilk](https://github.com/emilk)
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* Fix panic due to non-total ordering in `Area::compare_order()` [#5569](https://github.com/emilk/egui/pull/5569) by [@HactarCE](https://github.com/HactarCE)
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* Fix hovering through custom menu button [#5555](https://github.com/emilk/egui/pull/5555) by [@M4tthewDE](https://github.com/M4tthewDE)
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### 🚀 Performance
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* Use `u8` in `CornerRadius`, and introduce `CornerRadiusF32` [#5563](https://github.com/emilk/egui/pull/5563) by [@emilk](https://github.com/emilk)
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* Store `Margin` using `i8` to reduce its size [#5567](https://github.com/emilk/egui/pull/5567) by [@emilk](https://github.com/emilk)
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* Shrink size of `Shadow` by using `i8/u8` instead of `f32` [#5568](https://github.com/emilk/egui/pull/5568) by [@emilk](https://github.com/emilk)
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* Avoid allocations for loader cache lookup [#5584](https://github.com/emilk/egui/pull/5584) by [@mineichen](https://github.com/mineichen)
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* Use bitfield instead of bools in `Response` and `Sense` [#5556](https://github.com/emilk/egui/pull/5556) by [@polwel](https://github.com/polwel)
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## 0.30.0 - 2024-12-16 - Modals and better layer support
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### ✨ Highlights
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