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gallery/vendor/i-slint-core/Cargo.toml.orig
Greg Pomerantz 2f4768f354 Fix 120Hz scroll jank end-to-end: render-ahead present + full-cache eviction off the UI thread 
Three root causes, all fixed and verified on the Pixel 9 Pro:

1. Present phase (backend + renderer): VSYNC_LOCKED_RENDER defers the
   render to the vsync wake; RENDER_AHEAD presents the previous frame at
   the start of render() (phase = wake + ~1.1 ms) and holds the new
   frame one slot. Crash fix: a held wgpu frame must be PRESENTED, never
   merely dropped, before the next acquire (AlreadyAcquired panic at
   launch otherwise); discard_pending_frame presents too.

2. Full-res prefetch churn (src/lib.rs): the 8-slot full cache cycled
   through a ~20-cell viewport forever (137 decodes/20 s) and each
   eviction free()'d a 50 MB Vec on the UI thread (20-52 ms CPU spikes,
   ~7/s = the residual SLOWEV NonMain jank). Fix: 60 s tombstone
   cooldown on evicted paths (idle prefetch skips, urgent tap bypasses)
   + off-thread reaper for the freed blobs (insert: 21 ms -> 4 us).

3. (earlier) Skia final flush + Mailbox present mode (vendor, M3).

Instrumentation (all behind --features perf): OTHR/INVK/INVK_TAG/FLCK
lines for cross-thread closure timing and push-site tagging.

Warm measured swipe, 8580-file grid: cadence median 8.33 ms (exact
120 Hz), p99 15.5 ms, 5/552 gaps >16.7 ms (0.9%, max 28.3 ms, zero
>33 ms); PRES phase median ~994 us, zero late frames. Docs updated
(docs/BUGS/scroll-jank-120hz.md, full scorecard + line reference).

Also: vendored i-slint-core + wgpu-hal (vkshim interposition patch),
vkshim profiling tooling, backend made a non-optional dep, debuggable
flag for simpleperf (REMOVE before shipping).
2026-10-30 02:49:23 -04:00

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# Copyright © SixtyFPS GmbH <info@slint.dev>
# SPDX-License-Identifier: GPL-3.0-only OR LicenseRef-Slint-Royalty-free-2.0 OR LicenseRef-Slint-Software-3.0
# cSpell: ignore bitflags
[package]
name = "i-slint-core"
description = "Internal Slint Runtime Library."
authors.workspace = true
documentation.workspace = true
edition = "2024"
homepage.workspace = true
keywords.workspace = true
license.workspace = true
repository.workspace = true
rust-version.workspace = true
version.workspace = true
categories = ["gui", "development-tools", "no-std"]
[lib]
path = "lib.rs"
[features]
ffi = ["dep:static_assertions", "i-slint-core-macros/ffi"] # Expose C ABI
libm = ["num-traits/libm", "euclid/libm"]
# Allow the viewer to query at runtime information about item types
rtti = []
# Use the standard library
std = [
"euclid/std",
"once_cell/std",
"dep:web-time",
"path",
"raw-window-handle-06?/std",
"chrono/std",
"chrono/wasmbind",
"chrono/clock",
"dep:sys-locale",
"shared-fontique",
"i-slint-common/locale-decimal-separator",
"i-slint-common/color-parsing",
"i-slint-common/markdown",
"taffy/std",
]
# Unsafe feature meaning that there is only one core running and all thread_local are static.
# You can only enable this feature if you are sure that any API of this crate is only called
# from a single core, and not in a interrupt or signal handler.
unsafe-single-threaded = []
unicode = ["unicode-script", "unicode-linebreak"]
# Decode encoded images with the image crate. Not needed on wasm, where the
# browser decodes encoded image data.
image-decoders = ["dep:image", "dep:clru"]
image-default-formats = ["image?/default-formats"]
svg = ["dep:resvg", "i-slint-common/svg-text"]
box-shadow-cache = []
testing = []
shared-fontique = ["i-slint-common/shared-fontique"]
raw-window-handle-06 = ["dep:raw-window-handle-06"]
# The wgpu-{29,30} feature enables the internal wgpu module (SurfaceTarget, init helpers)
# without exposing public API types (GraphicsAPI::WGPU*, WGPUTexture, WGPUConfiguration).
# The unstable-wgpu-{29,30} feature additionally enables those public API types.
wgpu-29 = ["dep:wgpu-29"]
wgpu-30 = ["dep:wgpu-30"]
unstable-wgpu-29 = ["wgpu-29"]
unstable-wgpu-30 = ["wgpu-30"]
## If enabled, calls of `debug()` in `.slint` files use to the [`log::debug!()`] macro
## of the [log](https://crates.io/crates/log) crate instead of just `println!()`.
log = ["dep:log"]
tr = ["dep:tr"]
32-bit-color = []
default = ["std", "unicode", "shared-parley"]
# System tray (`SystemTrayIcon`) support. On Linux/BSD this pulls `ksni`; on
# other platforms it gates the native backend. When disabled, `SystemTrayIcon`
# constructs against a no-op backend. Opt-in (not part of `std`/`default`) so an
# application that doesn't want the tray dependency can leave it off; the
# user-facing crates list it in their own `default` so it stays on out of the box.
system-tray = ["dep:ksni", "dep:async-channel", "ksni/async-io", "ksni/blocking"]
shared-parley = ["shared-fontique", "dep:parley", "dep:skrifa", "dep:icu_normalizer"]
accessibility-text = ["std", "shared-parley", "dep:accesskit", "parley?/accesskit"]
shared-swash = ["dep:swash"]
path = ["dep:lyon_path", "dep:lyon_geom", "dep:lyon_algorithms", "dep:lyon_extra"]
[dependencies]
i-slint-common = { workspace = true, features = ["default"] }
i-slint-core-macros = { workspace = true, features = ["default"] }
const-field-offset = { version = "0.2.1", path = "../../helper_crates/const-field-offset" }
vtable = { workspace = true }
portable-atomic = { version = "1", features = ["critical-section"] }
cfg-if = "1"
derive_more = { workspace = true, features = ["error", "deref", "deref_mut"] }
euclid = { workspace = true }
lyon_algorithms = { version = "1.0", optional = true, default-features = false }
lyon_geom = { version = "1.0", optional = true, default-features = false }
lyon_path = { workspace = true, optional = true, default-features = false }
lyon_extra = { version = "1.1", optional = true, default-features = false }
num-traits = { version = "0.2", default-features = false }
once_cell = { version = "1.5", default-features = false, features = ["critical-section"] }
pin-project = "1"
pin-weak = { version = "1.1", default-features = false }
# Note: the rgb version is extracted in ci.yaml for rustdoc builds
rgb = "0.8.27"
scopeguard = { version = "1.1.0", default-features = false }
slab = { version = "0.4.3", default-features = false }
static_assertions = { version = "1.1", optional = true }
strum = { workspace = true }
log = { workspace = true, optional = true }
# Note: We're migrating our unicode handling over to the icu family of crates.
# Prefer using icu crates over adding more unicode-* dependencies
# parley uses the icu crates internally as well, so we'll share the dependency there.
unicode-segmentation = { workspace = true }
unicode-linebreak = { version = "0.1.5", optional = true }
unicode-script = { version = "0.5.7", optional = true }
icu_normalizer = { workspace = true, optional = true }
sys-locale = { version = "0.3.2", optional = true, features = ["js"] }
accesskit = { version = "0.24", optional = true }
image = { workspace = true, optional = true, default-features = false }
clru = { workspace = true, optional = true }
resvg = { workspace = true, optional = true }
serde = { workspace = true, optional = true }
raw-window-handle-06 = { workspace = true, optional = true }
bitflags = { version = "2.4.2" }
chrono = { version = "0.4", default-features = false, features = ["alloc"] }
skrifa = { workspace = true, optional = true }
swash = { workspace = true, optional = true, features = ["scale"] }
wgpu-29 = { workspace = true, optional = true }
wgpu-30 = { workspace = true, optional = true }
tr = { workspace = true, optional = true }
taffy = { version = "0.10", default-features = false, features = ["flexbox", "taffy_tree", "alloc"] }
[target.'cfg(target_family = "unix")'.dependencies]
gettext-rs = { version = "0.7.1", optional = true, features = ["gettext-system"] }
[target.'cfg(target_os = "macos")'.dependencies]
objc2 = { workspace = true }
objc2-app-kit = { version = "0.3.2", default-features = false, features = ["std", "NSStatusBar", "NSStatusItem", "NSStatusBarButton", "NSButton", "NSControl", "NSResponder", "NSView", "NSImage", "NSMenu", "NSMenuItem", "NSApplication", "NSAppearance", "objc2-core-foundation"] }
objc2-foundation = { version = "0.3.2", default-features = false, features = ["std", "NSArray", "NSData", "NSDictionary", "NSKeyValueObserving", "NSString", "NSGeometry", "NSObjCRuntime"] }
image = { workspace = true, default-features = false, features = ["png"] }
[target.'cfg(target_os = "windows")'.dependencies]
windows = { workspace = true, features = ["Win32_Foundation", "Win32_Graphics_Gdi", "Win32_System_LibraryLoader", "Win32_UI_Shell", "Win32_UI_WindowsAndMessaging"] }
[target.'cfg(all(target_family = "unix", not(target_vendor = "apple"), not(target_os = "android")))'.dependencies]
ksni = { version = "0.3.3", optional = true, default-features = false }
async-channel = { version = "2", optional = true }
# The complex-scripts line-breaking dictionaries cost several MB, so leave them out of
# wasm binaries.
[target.'cfg(not(target_arch = "wasm32"))'.dependencies]
parley = { version = "0.11.1", optional = true, features = ["complex-scripts"] }
[target.'cfg(target_arch = "wasm32")'.dependencies]
parley = { version = "0.11.1", optional = true }
web-time = { version = "1.0", optional = true }
wasm-bindgen = { version = "0.2" }
js-sys = { version = "0.3", default-features = false, features = ["std"] }
clru = { workspace = true }
web-sys = { workspace = true, features = ["HtmlImageElement", "Navigator", "Blob", "BlobPropertyBag", "Url", "DomParser", "SupportedType", "Document", "Element"] }
[dev-dependencies]
slint = { path = "../../api/rs/slint", default-features = false, features = ["std", "compat-1-2", "renderer-software"] }
i-slint-backend-testing = { path = "../backends/testing", features = ["internal"] }
rustybuzz = { workspace = true }
ttf-parser = { workspace = true }
serde_json = { workspace = true }
tiny-skia = "0.12.0"
tokio = { version = "1.35", features = ["rt-multi-thread", "macros", "time", "net", "io-util"] }
async-compat = { version = "0.2.4" }
tempfile = { version = "3.12.0" }
fontique = { workspace = true }
criterion = "0.8"
[lints.rust]
unexpected_cfgs = { level = "warn", check-cfg = ["cfg(slint_debug_property)", "cfg(cbindgen)", "cfg(slint_int_coord)", "cfg(slint_nightly_test)"] }
[lints.clippy]
# Coord is an alias for f32 in most architectures, but not always, so the cast
# to f32 *is* necessary.
unnecessary_cast = { level = "allow" }
[package.metadata.docs.rs]
rustdoc-args = ["--generate-link-to-definition"]
[[bench]]
name = "string"
harness = false
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