bevy/crates/bevy_text/src/font.rs
Zachary Harrold d70595b667
Add core and alloc over std Lints (#15281)
# Objective

- Fixes #6370
- Closes #6581

## Solution

- Added the following lints to the workspace:
  - `std_instead_of_core`
  - `std_instead_of_alloc`
  - `alloc_instead_of_core`
- Used `cargo +nightly fmt` with [item level use
formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Item%5C%3A)
to split all `use` statements into single items.
- Used `cargo clippy --workspace --all-targets --all-features --fix
--allow-dirty` to _attempt_ to resolve the new linting issues, and
intervened where the lint was unable to resolve the issue automatically
(usually due to needing an `extern crate alloc;` statement in a crate
root).
- Manually removed certain uses of `std` where negative feature gating
prevented `--all-features` from finding the offending uses.
- Used `cargo +nightly fmt` with [crate level use
formatting](https://rust-lang.github.io/rustfmt/?version=v1.6.0&search=#Crate%5C%3A)
to re-merge all `use` statements matching Bevy's previous styling.
- Manually fixed cases where the `fmt` tool could not re-merge `use`
statements due to conditional compilation attributes.

## Testing

- Ran CI locally

## Migration Guide

The MSRV is now 1.81. Please update to this version or higher.

## Notes

- This is a _massive_ change to try and push through, which is why I've
outlined the semi-automatic steps I used to create this PR, in case this
fails and someone else tries again in the future.
- Making this change has no impact on user code, but does mean Bevy
contributors will be warned to use `core` and `alloc` instead of `std`
where possible.
- This lint is a critical first step towards investigating `no_std`
options for Bevy.

---------

Co-authored-by: François Mockers <francois.mockers@vleue.com>
2024-09-27 00:59:59 +00:00

35 lines
1.1 KiB
Rust

use alloc::sync::Arc;
use bevy_asset::Asset;
use bevy_reflect::TypePath;
/// An [`Asset`] that contains the data for a loaded font, if loaded as an asset.
///
/// Loaded by [`FontLoader`](crate::FontLoader).
///
/// # A note on fonts
///
/// `Font` may differ from the everyday notion of what a "font" is.
/// A font *face* (e.g. Fira Sans Semibold Italic) is part of a font *family* (e.g. Fira Sans),
/// and is distinguished from other font faces in the same family
/// by its style (e.g. italic), its weight (e.g. bold) and its stretch (e.g. condensed).
///
/// Bevy currently loads a single font face as a single `Font` asset.
#[derive(Debug, TypePath, Clone, Asset)]
pub struct Font {
/// Content of a font file as bytes
pub data: Arc<Vec<u8>>,
}
impl Font {
/// Creates a [`Font`] from bytes
pub fn try_from_bytes(
font_data: Vec<u8>,
) -> Result<Self, cosmic_text::ttf_parser::FaceParsingError> {
use cosmic_text::ttf_parser;
ttf_parser::Face::parse(&font_data, 0)?;
Ok(Self {
data: Arc::new(font_data),
})
}
}