1efc762924
# Objective
- Introduce a stable alternative to
[`std::any::type_name`](https://doc.rust-lang.org/std/any/fn.type_name.html).
- Rewrite of #5805 with heavy inspiration in design.
- On the path to #5830.
- Part of solving #3327.
## Solution
- Add a `TypePath` trait for static stable type path/name information.
- Add a `TypePath` derive macro.
- Add a `impl_type_path` macro for implementing internal and foreign
types in `bevy_reflect`.
---
## Changelog
- Added `TypePath` trait.
- Added `DynamicTypePath` trait and `get_type_path` method to `Reflect`.
- Added a `TypePath` derive macro.
- Added a `bevy_reflect::impl_type_path` for implementing `TypePath` on
internal and foreign types in `bevy_reflect`.
- Changed `bevy_reflect::utility::(Non)GenericTypeInfoCell` to
`(Non)GenericTypedCell<T>` which allows us to be generic over both
`TypeInfo` and `TypePath`.
- `TypePath` is now a supertrait of `Asset`, `Material` and
`Material2d`.
- `impl_reflect_struct` needs a `#[type_path = "..."]` attribute to be
specified.
- `impl_reflect_value` needs to either specify path starting with a
double colon (`::core::option::Option`) or an `in my_crate::foo`
declaration.
- Added `bevy_reflect_derive::ReflectTypePath`.
- Most uses of `Ident` in `bevy_reflect_derive` changed to use
`ReflectTypePath`.
## Migration Guide
- Implementors of `Asset`, `Material` and `Material2d` now also need to
derive `TypePath`.
- Manual implementors of `Reflect` will need to implement the new
`get_type_path` method.
## Open Questions
- [x] ~This PR currently does not migrate any usages of
`std::any::type_name` to use `bevy_reflect::TypePath` to ease the review
process. Should it?~ Migration will be left to a follow-up PR.
- [ ] This PR adds a lot of `#[derive(TypePath)]` and `T: TypePath` to
satisfy new bounds, mostly when deriving `TypeUuid`. Should we make
`TypePath` a supertrait of `TypeUuid`? [Should we remove `TypeUuid` in
favour of
`TypePath`?](2afbd85532 (r961067892))
46 lines
1.4 KiB
Rust
46 lines
1.4 KiB
Rust
use ab_glyph::{FontArc, FontVec, InvalidFont, OutlinedGlyph};
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use bevy_reflect::{TypePath, TypeUuid};
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use bevy_render::{
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render_resource::{Extent3d, TextureDimension, TextureFormat},
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texture::Image,
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};
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#[derive(Debug, TypeUuid, TypePath, Clone)]
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#[uuid = "97059ac6-c9ba-4da9-95b6-bed82c3ce198"]
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pub struct Font {
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pub font: FontArc,
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}
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impl Font {
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pub fn try_from_bytes(font_data: Vec<u8>) -> Result<Self, InvalidFont> {
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let font = FontVec::try_from_vec(font_data)?;
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let font = FontArc::new(font);
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Ok(Font { font })
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}
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pub fn get_outlined_glyph_texture(outlined_glyph: OutlinedGlyph) -> Image {
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let bounds = outlined_glyph.px_bounds();
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let width = bounds.width() as usize;
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let height = bounds.height() as usize;
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let mut alpha = vec![0.0; width * height];
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outlined_glyph.draw(|x, y, v| {
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alpha[y as usize * width + x as usize] = v;
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});
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// TODO: make this texture grayscale
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Image::new(
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Extent3d {
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width: width as u32,
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height: height as u32,
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depth_or_array_layers: 1,
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},
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TextureDimension::D2,
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alpha
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.iter()
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.flat_map(|a| vec![255, 255, 255, (*a * 255.0) as u8])
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.collect::<Vec<u8>>(),
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TextureFormat::Rgba8UnormSrgb,
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)
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}
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}
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