Slint compiler embed font glyphs build error

[fluolite]

Bug Description

Fontdue load all font glyphs at startup, this cause too much memory occupied.
So I need to change ttf_parser to owned_ttf_parser in fontdue dependencies.

Reproducible Code (if applicable)

Environment Details

• Slint Version: 1.9.2
• Platform/OS: linuxkms
• Programming Language: rust
• Backend/Renderer: soft renderer

Product Impact

No response

[ogoffart]

How do you enable this owned_ttf_parser? How does your Cargo.toml looks like?

[fluolite]

How do you enable this owned_ttf_parser? How does your Cargo.toml looks like?

I fix fontdue Cargo.toml

# THIS FILE IS AUTOMATICALLY GENERATED BY CARGO
#
# When uploading crates to the registry Cargo will automatically
# "normalize" Cargo.toml files for maximal compatibility
# with all versions of Cargo and also rewrite `path` dependencies
# to registry (e.g., crates.io) dependencies.
#
# If you are reading this file be aware that the original Cargo.toml
# will likely look very different (and much more reasonable).
# See Cargo.toml.orig for the original contents.

[package]
edition = "2018"
name = "fontdue"
version = "0.9.3"
authors = ["Joe Cumbo <[email protected]>"]
build = false
exclude = ["dev/**"]
autobins = false
autoexamples = false
autotests = false
autobenches = false
description = "A simple no_std font parser and rasterizer."
homepage = "https://github.com/mooman219/fontdue"
documentation = "https://docs.rs/fontdue"
readme = "README.md"
keywords = [
    "font",
    "text",
    "truetype",
    "opentype",
    "ttf",
]
categories = [
    "no-std",
    "gui",
]
license = "MIT OR Apache-2.0 OR Zlib"
repository = "https://github.com/mooman219/fontdue"

[lib]
name = "fontdue"
path = "src/lib.rs"

[dependencies.hashbrown]
version = "0.15"
optional = true

[dependencies.rayon]
version = "1.10"
optional = true

[dependencies.ttf-parser]
version = "0.21"
features = ["opentype-layout"]
default-features = false

[dependencies.owned_ttf_parser]
version = "0.21"

[features]
default = [
    "simd",
    "hashbrown",
]
parallel = [
    "rayon",
    "hashbrown",
    "hashbrown/rayon",
]
simd = []
std = []

[badges.maintenance]
status = "experimental"

[ogoffart]

So you've changed the Slint code to use OwnedFaced, and then the compiler report that it cannot be used in threads. Then you can change par_iter => iter to do the iteration in only a single thread.

[fluolite]

Thank you, then later version can consider concurrently this question, or optimize the dynamic management of font's glyph.