## Short bluesky announcement:
We just released egui 0.33.0!
Highlights:
- `egui::Plugin` a improved way to create and access egui plugins
- [kitdiff](https://github.com/rerun-io/kitdiff), a viewer for
egui_kittest image snapshots (and a general image diff tool)
- better kerning (check the diff on
[kitdiff](https://rerun-io.github.io/kitdiff/?url=https://github.com/emilk/egui/pull/7431))
https://github.com/user-attachments/assets/971f0493-6dae-42e5-8019-58b74cf5d203
## Relaese Changelog:
egui is an easy-to-use immediate mode GUI for Rust that runs on both web
and native.
Try it now: <https://www.egui.rs/>
egui development is sponsored by [Rerun](https://www.rerun.io/), a
startup building an SDK for visualizing streams of multimodal data.
# egui 0.33.0 changelog
Highlights from this release:
- `egui::Plugin` a improved way to create and access egui plugins
- [kitdiff](https://github.com/rerun-io/kitdiff), a viewer for
egui_kittest image snapshots (and a general image diff tool)
- better kerning
### Improved kerning
As a step towards using [parley](https://github.com/linebender/parley)
for font rendering, @valadaptive has refactored the font loading and
rendering code. A result of this (next to the font rendering code being
much nicer now) is improved kerning.
Notice how the c moved away from the k:
### `egui::Plugin` trait
We've added a new trait-based plugin api, meant to replace
`Context::on_begin_pass` and `Context::on_end_pass`.
This makes it a lot easier to handle state in your plugins. Instead of
having to write to egui memory it can live right on your plugin struct.
The trait based api also makes easier to add new hooks that plugins can
use. In addition to `on_begin_pass` and `on_end_pass`, the `Plugin`
trait now has a `input_hook` and `output_hook` which you can use to
inspect / modify the `RawInput` / `FullOutput`.
### kitdiff, a image diff viewer
At rerun we have a ton of snapshots. Some PRs will change most of them
(e.g. [the](https://github.com/rerun-io/rerun/pull/11253/files)
[one](https://rerun-io.github.io/kitdiff/?url=https://github.com/rerun-io/rerun/pull/11253/files)
that updated egui and introduced the kerning improvements, ~500
snapshots changed!).
If you really want to look at every changed snapshot it better be as
efficient as possible, and the experience on github, fiddeling with the
sliders, is kind of frustrating.
In order to fix this, we've made
[kitdiff](https://rerun-io.github.io/kitdiff/).
You can use it locally via
- `kitdiff files .` will search for .new.png and .diff.png files
- `kitdiff git` will compare the current files to the default branch
(main/master)
Or in the browser via
- going to https://rerun-io.github.io/kitdiff/ and pasting a PR or
github artifact url
- linking to kitdiff via e.g. a github workflow
`https://rerun-io.github.io/kitdiff/?url=<link_to_pr_or_artefact>`
To install kitdiff run `cargo install --git
https://github.com/rerun-io/kitdiff`
Here is a video showing the kerning changes in kitdiff ([try it
yourself](https://rerun-io.github.io/kitdiff/?url=https://github.com/rerun-io/rerun/pull/11253/files)):
https://github.com/user-attachments/assets/74640af1-09ba-435a-9d0c-2cbeee140c8f
### Migration guide
- `egui::Mutex` now has a timeout as a simple deadlock detection
- If you use a `egui::Mutex` in some place where it's held for longer
than a single frame, you should switch to the std mutex or parking_lot
instead (egui mutexes are wrappers around parking lot)
- `screen_rect` is deprecated
- In order to support safe areas, egui now has `viewport_rect` and
`content_rect`.
- Update all usages of `screen_rect` to `content_rect`, unless you are
sure that you want to draw outside the `safe area` (which would mean
your Ui may be covered by notches, system ui, etc.)
* Triage for GL backend
* And cargo-fmt
* Changelog update with PR and issue
* Update crates/eframe/src/epi/mod.rs
Co-authored-by: Andreas Reich <r_andreas2@web.de>
* Update crates/egui-wgpu/src/winit.rs
Co-authored-by: Andreas Reich <r_andreas2@web.de>
* Add "supports_screenshot" to surface state
* Cranky fix
* fmt
---------
Co-authored-by: Andreas Reich <r_andreas2@web.de>
* [egui-wgpu] Do vertex & index buffer in a single copy each
Also, copy uniform buffer only if necessary.
Previously, we did hundreds of small copies via queue.write_buffer which would create a new buffer for each of these copies. Now, there are only two gpu sided copy operations and the memory goes directly to the staging buffer.
In a quick debug test on Rerun this decreased time for the `update_buffer` method from about 0.87ms to 0.37ms!
* fix comparing padding on UniformBuffer in wgpu renderer
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
* Support for transparent backbuffer in wgpu winit binding
Choose best fitting composite alpha mode on the fly.
* Compilation fix
* Add line to eframe CHANGELOG
* Attempt to mollify CI: try different way to install apt packages
---------
Co-authored-by: Emil Ernerfeldt <emil.ernerfeldt@gmail.com>
* eframe::run_native: return errors instead of crashing
* Detect and handle glutin errors
* egui_demo_app: silence wgpu log spam
* Add trace logs for why eframe is shutting down
* Fix: only save App state once on Mac
* Handle Winit failure
* Log where we load app state from
* Don't panic on zero-sized window
* Clamp loaded window size to not be too tiny to see
* Simplify code: more shared code in window_builder
* Improve code readability
* Fix wasm32 build
* fix android
* Update changelog
* introduce new wgpu configuration option to allow configuring wgpu renderer
* use new options with wgpu web painter
* use on_surface_error callback
* changelog update
* cleanup
* changelog and comment fixes
