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Lucas Meurer 96470fabee Release 0.33.0 - egui::Plugin, better kerning, kitdiff viewer (#7622) 
## 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:

![Oct-09-2025
16-21-58](https://github.com/user-attachments/assets/d4a17e87-5e98-40db-a85a-fa77fa77aceb)


### `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.)
2025-10-09 19:14:14 +02:00

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[workspace]
resolver = "2"
members = [
"crates/ecolor",
"crates/egui_demo_app",
"crates/egui_demo_lib",
"crates/egui_extras",
"crates/egui_glow",
"crates/egui_kittest",
"crates/egui-wgpu",
"crates/egui-winit",
"crates/egui",
"crates/emath",
"crates/epaint",
"crates/epaint_default_fonts",
"examples/*",
"tests/*",
"xtask",
]
[workspace.package]
edition = "2024"
license = "MIT OR Apache-2.0"
rust-version = "1.88"
version = "0.33.0"
[profile.release]
# lto = true # VERY slightly smaller wasm
# opt-level = 's' # 10-20% smaller wasm compared to `opt-level = 3`
# opt-level = 1 # very slow and big wasm. Don't do this.
opt-level = 2 # fast and small wasm, basically same as `opt-level = 's'`
# opt-level = 3 # unnecessarily large wasm for no performance gain
# debug = true # include debug symbols, useful when profiling wasm
panic = "abort" # This leads to better optimizations and smaller binaries (and is the default in Wasm anyways).
[profile.dev]
# Can't leave this on by default, because it breaks the Windows build. Related: https://github.com/rust-lang/cargo/issues/4897
# split-debuginfo = "unpacked" # faster debug builds on mac
# opt-level = 1 # Make debug builds run faster
# panic = "abort" leads to better optimizations and smaller binaries (and is the default in Wasm anyways),
# but it also means backtraces don't work with the `backtrace` library (https://github.com/rust-lang/backtrace-rs/issues/397).
# egui has a feature where if you hold down all modifiers keys on your keyboard and hover any UI widget,
# you will see the backtrace to that widget, and we don't want to break that feature in dev builds.
[profile.dev.package."*"]
# Optimize all dependencies even in debug builds (does not affect workspace packages):
opt-level = 2
[workspace.dependencies]
emath = { version = "0.33.0", path = "crates/emath", default-features = false }
ecolor = { version = "0.33.0", path = "crates/ecolor", default-features = false }
epaint = { version = "0.33.0", path = "crates/epaint", default-features = false }
epaint_default_fonts = { version = "0.33.0", path = "crates/epaint_default_fonts" }
egui = { version = "0.33.0", path = "crates/egui", default-features = false }
egui-winit = { version = "0.33.0", path = "crates/egui-winit", default-features = false }
egui_extras = { version = "0.33.0", path = "crates/egui_extras", default-features = false }
egui-wgpu = { version = "0.33.0", path = "crates/egui-wgpu", default-features = false }
egui_demo_lib = { version = "0.33.0", path = "crates/egui_demo_lib", default-features = false }
egui_glow = { version = "0.33.0", path = "crates/egui_glow", default-features = false }
egui_kittest = { version = "0.33.0", path = "crates/egui_kittest", default-features = false }
eframe = { version = "0.33.0", path = "crates/eframe", default-features = false }
accesskit = "0.21.1"
accesskit_consumer = "0.30.1"
accesskit_winit = "0.29.1"
ab_glyph = "0.2.32"
ahash = { version = "0.8.12", default-features = false, features = [
"no-rng", # we don't need DOS-protection, so we let users opt-in to it instead
"std",
] }
android_logger = "0.15.1"
arboard = { version = "3.6.1", default-features = false }
backtrace = "0.3.76"
bitflags = "2.9.4"
bytemuck = "1.24.0"
chrono = { version = "0.4.42", default-features = false }
cint = "0.3.1"
color-hex = "0.2.0"
criterion = { version = "0.7.0", default-features = false }
dify = { version = "0.7.4", default-features = false }
directories = "6.0.0"
document-features = "0.2.11"
ehttp = { version = "0.5.0", default-features = false }
enum-map = "2.7.3"
env_logger = { version = "0.11.8", default-features = false }
glow = "0.16.0"
glutin = { version = "0.32.3", default-features = false }
glutin-winit = { version = "0.5.0", default-features = false }
home = "0.5.9"
image = { version = "0.25.6", default-features = false }
js-sys = "0.3.77"
kittest = { version = "0.3.0" }
log = { version = "0.4.28", features = ["std"] }
memoffset = "0.9.1"
mimalloc = "0.1.48"
mime_guess2 = { version = "2.3.1", default-features = false }
mint = "0.5.9"
nohash-hasher = "0.2.0"
objc2 = "0.5.2"
objc2-app-kit = { version = "0.2.2", default-features = false }
objc2-foundation = { version = "0.2.2", default-features = false }
objc2-ui-kit = { version = "0.2.2", default-features = false }
open = "5.3.2"
parking_lot = "0.12.5"
percent-encoding = "2.3.2"
poll-promise = { version = "0.3.0", default-features = false }
pollster = "0.4.0"
profiling = { version = "1.0.17", default-features = false }
puffin = "0.19.1"
puffin_http = "0.16.1"
rand = "0.9.2"
raw-window-handle = "0.6.2"
rayon = "1.11.0"
resvg = { version = "0.45.1", default-features = false }
rfd = "0.15.4"
ron = "0.11.0"
serde = { version = "1.0.228", features = ["derive"] }
similar-asserts = "1.7.0"
smallvec = "1.15.1"
smithay-clipboard = "0.7.2"
static_assertions = "1.1.0"
syntect = { version = "5.3.0", default-features = false }
tempfile = "3.23.0"
thiserror = "2.0.17"
tokio = "1.47.1"
type-map = "0.5.1"
unicode_names2 = { version = "2.0.0", default-features = false }
unicode-segmentation = "1.12.0"
wasm-bindgen = "0.2.100" # Keep wasm-bindgen version in sync in: setup_web.sh, Cargo.toml, Cargo.lock, rust.yml
wasm-bindgen-futures = "0.4.0"
wayland-cursor = { version = "0.31.11", default-features = false }
web-sys = "0.3.77"
web-time = "1.1.0" # Timekeeping for native and web
webbrowser = "1.0.5"
wgpu = { version = "27.0.1", default-features = false, features = ["std"] }
windows-sys = "0.61.2"
winit = { version = "0.30.12", default-features = false }
[workspace.lints.rust]
unsafe_code = "deny"
elided_lifetimes_in_paths = "warn"
future_incompatible = { level = "warn", priority = -1 }
nonstandard_style = { level = "warn", priority = -1 }
rust_2018_idioms = { level = "warn", priority = -1 }
rust_2021_prelude_collisions = "warn"
semicolon_in_expressions_from_macros = "warn"
trivial_numeric_casts = "warn"
unexpected_cfgs = "warn"
unsafe_op_in_unsafe_fn = "warn" # `unsafe_op_in_unsafe_fn` may become the default in future Rust versions: https://github.com/rust-lang/rust/issues/71668
unused_extern_crates = "warn"
unused_import_braces = "warn"
unused_lifetimes = "warn"
trivial_casts = "allow"
unused_qualifications = "allow"
[workspace.lints.rustdoc]
all = "warn"
missing_crate_level_docs = "warn"
broken_intra_doc_links = "warn"
# See also clippy.toml
[workspace.lints.clippy]
all = { level = "warn", priority = -1 }
allow_attributes = "warn"
as_ptr_cast_mut = "warn"
await_holding_lock = "warn"
bool_to_int_with_if = "warn"
branches_sharing_code = "warn"
char_lit_as_u8 = "warn"
checked_conversions = "warn"
clear_with_drain = "warn"
cloned_instead_of_copied = "warn"
dbg_macro = "warn"
debug_assert_with_mut_call = "warn"
default_union_representation = "warn"
derive_partial_eq_without_eq = "warn"
disallowed_macros = "warn" # See clippy.toml
disallowed_methods = "warn" # See clippy.toml
disallowed_names = "warn" # See clippy.toml
disallowed_script_idents = "warn" # See clippy.toml
disallowed_types = "warn" # See clippy.toml
doc_comment_double_space_linebreaks = "warn"
doc_link_with_quotes = "warn"
doc_markdown = "warn"
elidable_lifetime_names = "warn"
empty_enum = "warn"
empty_enum_variants_with_brackets = "warn"
empty_line_after_outer_attr = "warn"
enum_glob_use = "warn"
equatable_if_let = "warn"
exit = "warn"
expl_impl_clone_on_copy = "warn"
explicit_deref_methods = "warn"
explicit_into_iter_loop = "warn"
explicit_iter_loop = "warn"
fallible_impl_from = "warn"
filter_map_next = "warn"
flat_map_option = "warn"
float_cmp_const = "warn"
fn_params_excessive_bools = "warn"
fn_to_numeric_cast_any = "warn"
from_iter_instead_of_collect = "warn"
get_unwrap = "warn"
if_let_mutex = "warn"
ignore_without_reason = "warn"
implicit_clone = "warn"
implied_bounds_in_impls = "warn"
imprecise_flops = "warn"
inconsistent_struct_constructor = "warn"
index_refutable_slice = "warn"
inefficient_to_string = "warn"
infinite_loop = "warn"
into_iter_without_iter = "warn"
invalid_upcast_comparisons = "warn"
iter_filter_is_ok = "warn"
iter_filter_is_some = "warn"
iter_not_returning_iterator = "warn"
iter_on_empty_collections = "warn"
iter_on_single_items = "warn"
iter_over_hash_type = "warn"
iter_without_into_iter = "warn"
large_digit_groups = "warn"
large_include_file = "warn"
large_stack_arrays = "warn"
large_stack_frames = "warn"
large_types_passed_by_value = "warn"
let_unit_value = "warn"
linkedlist = "warn"
literal_string_with_formatting_args = "warn"
lossy_float_literal = "warn"
macro_use_imports = "warn"
manual_assert = "warn"
manual_clamp = "warn"
manual_instant_elapsed = "warn"
manual_is_power_of_two = "warn"
manual_is_variant_and = "warn"
manual_let_else = "warn"
manual_midpoint = "warn" # NOTE `midpoint` is often a lot slower for floats, so we have our own `emath::fast_midpoint` function.
manual_ok_or = "warn"
manual_string_new = "warn"
map_err_ignore = "warn"
map_flatten = "warn"
match_bool = "warn"
match_same_arms = "warn"
match_wild_err_arm = "warn"
match_wildcard_for_single_variants = "warn"
mem_forget = "warn"
mismatching_type_param_order = "warn"
missing_assert_message = "warn"
missing_enforced_import_renames = "warn"
missing_errors_doc = "warn"
missing_safety_doc = "warn"
mixed_attributes_style = "warn"
mut_mut = "warn"
mutex_integer = "warn"
needless_borrow = "warn"
needless_continue = "warn"
needless_for_each = "warn"
needless_pass_by_ref_mut = "warn"
needless_pass_by_value = "warn"
negative_feature_names = "warn"
non_std_lazy_statics = "warn"
non_zero_suggestions = "warn"
nonstandard_macro_braces = "warn"
option_as_ref_cloned = "warn"
option_option = "warn"
path_buf_push_overwrite = "warn"
pathbuf_init_then_push = "warn"
precedence_bits = "warn"
print_stderr = "warn"
print_stdout = "warn"
ptr_as_ptr = "warn"
ptr_cast_constness = "warn"
pub_underscore_fields = "warn"
pub_without_shorthand = "warn"
rc_mutex = "warn"
readonly_write_lock = "warn"
redundant_type_annotations = "warn"
ref_as_ptr = "warn"
ref_option_ref = "warn"
ref_patterns = "warn"
rest_pat_in_fully_bound_structs = "warn"
return_and_then = "warn"
same_functions_in_if_condition = "warn"
semicolon_if_nothing_returned = "warn"
set_contains_or_insert = "warn"
single_char_pattern = "warn"
single_match_else = "warn"
single_option_map = "warn"
str_split_at_newline = "warn"
str_to_string = "warn"
string_add = "warn"
string_add_assign = "warn"
string_lit_as_bytes = "warn"
string_lit_chars_any = "warn"
string_to_string = "warn"
suspicious_command_arg_space = "warn"
suspicious_xor_used_as_pow = "warn"
todo = "warn"
too_long_first_doc_paragraph = "warn"
trailing_empty_array = "warn"
trait_duplication_in_bounds = "warn"
transmute_ptr_to_ptr = "warn"
tuple_array_conversions = "warn"
unchecked_duration_subtraction = "warn"
undocumented_unsafe_blocks = "warn"
unimplemented = "warn"
uninhabited_references = "warn"
uninlined_format_args = "warn"
unnecessary_box_returns = "warn"
unnecessary_debug_formatting = "warn"
unnecessary_literal_bound = "warn"
unnecessary_safety_comment = "warn"
unnecessary_safety_doc = "warn"
unnecessary_self_imports = "warn"
unnecessary_semicolon = "warn"
unnecessary_struct_initialization = "warn"
unnecessary_wraps = "warn"
unnested_or_patterns = "warn"
unused_peekable = "warn"
unused_rounding = "warn"
unused_self = "warn"
unused_trait_names = "warn"
use_self = "warn"
useless_let_if_seq = "warn"
useless_transmute = "warn"
verbose_file_reads = "warn"
wildcard_dependencies = "warn"
zero_sized_map_values = "warn"
# TODO(emilk): maybe enable more of these lints?
comparison_chain = "allow"
should_panic_without_expect = "allow"
too_many_lines = "allow"
unwrap_used = "allow" # TODO(emilk): We really wanna warn on this one
# These are meh:
assigning_clones = "allow" # No please
let_underscore_must_use = "allow"
let_underscore_untyped = "allow"
manual_range_contains = "allow" # this one is just worse imho
map_unwrap_or = "allow" # so is this one
self_named_module_files = "allow" # Disabled waiting on https://github.com/rust-lang/rust-clippy/issues/9602
significant_drop_tightening = "allow" # Too many false positives
wildcard_imports = "allow" # `use crate::*` is useful to avoid merge conflicts when adding/removing imports
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