Comments (6)
You should use owned-ttf-parser instead.
Is font parse not one-time action?
No. ttf-parser parses the font parts on demand. Parsing the whole font into the memory is absurd and no one is doing this.
The lifetime is required, since Face
doesn't allocate anything (at least on heap). At all.
from ttf-parser.
You should use owned-ttf-parser instead.
Is font parse not one-time action?
No. ttf-parser parses the font parts on demand. Parsing the whole font into the memory is absurd and no one is doing this.
The lifetime is required, since
Face
doesn't allocate anything (at least on heap). At all.
Hey @RazrFalcon ,
I'm currently utilizing ttf-parser
and exploring the possibility of caching the Face
object for repeated use. Below is a snippet of my current implementation (which didn't work out due to the lifetime constraints and the fact that I'm no experienced Rust developer yet):
#[derive(Resource, Default)]
pub struct FontCacheRes {
font_content: HashMap<u64, CachedFont>,
}
#[derive(Default)]
pub struct CachedFont {
pub content: Vec<u8>,
// https://github.com/RazrFalcon/ttf-parser/issues/37
// pub face: Option<Face>, // TODO: Cache Face?
pub font: Font,
}
impl CachedFont {
// pub fn get_or_create_face(&'a mut self) -> &'a Face<'a> {
// if self.face.is_none() {
// self.face = Face::from_slice(&self.content, 0);
// }
// self.face.as_ref().unwrap()
// }
}
Given the lifetime requirements of Face
, I'm debating whether caching the Face makes any sense or if there's a recommended practice for handling such scenarios. Is it advisable to cache Face
within a struct, or should I reparse the font data each time it's required? Insights or best practices on this matter would be very helpful.
Thanks :)
from ttf-parser.
As the comment above mentioned - just use owned-ttf-parser.
And yes, depending on your performance requirements you might be fine with re-parsing the Face
on each access.
Face::parse
doesn't actually parse the whole font, only some basic metadata.
from ttf-parser.
As the comment above mentioned - just use owned-ttf-parser.
And yes, depending on your performance requirements you might be fine with re-parsing the
Face
on each access.Face::parse
doesn't actually parse the whole font, only some basic metadata.
thanks for the quick reply 🙏 Can I use owned-ttf-parser
with rustybuzz
though?
from ttf-parser.
Yes. owned-ttf-parser
is just a wrapper for ttf-parser
. See docs.
from ttf-parser.
Yes.
owned-ttf-parser
is just a wrapper forttf-parser
. See docs.
Thanks for the quick information. I'll explore both caching and not caching the Face to see what works best for my SVG text rendering project. Also, a big thanks for developing rustybuzz & ttf-parser – it looks like a great fit for my needs 👍🙏
from ttf-parser.
Related Issues (20)
- When parsing a regular font (not a collection) the index is ignored HOT 4
- C-api in rust 32-bit environment,Test case call failed
- Zero offsets in `parse_at_offset16` HOT 17
- Add essential links to README HOT 2
- Question about parser.rs HOT 2
- Can you add an example of how to create a simple letter and save as a font? HOT 3
- Serde feature HOT 1
- The direction of outline contour? HOT 3
- how to get a variable instance of a variable font HOT 2
- Support woff2 HOT 1
- Does it support monochrome fonts HOT 1
- parse_char_string_width does not take subroutines into account HOT 6
- Support GDEF Ligature Caret List Table HOT 3
- Getting the number of faces HOT 15
- font_collection_num_fonts_overflow test fails on 32-bit architectures HOT 3
- Missing instance records in fvar::Table HOT 3
- Face::set_variation change in behaviour HOT 1
- Request for Addition of an Interface to Extract Basic Font Information from Files to Support Directory Scan of All Fonts for Rendering Unicode Text HOT 2
- ttf-parser v0.20 fails to compile on Rust 1.76 HOT 2
- unicode_ranges Documentation is Incorrect HOT 1
Recommend Projects
-
React
A declarative, efficient, and flexible JavaScript library for building user interfaces.
-
Vue.js
🖖 Vue.js is a progressive, incrementally-adoptable JavaScript framework for building UI on the web.
-
Typescript
TypeScript is a superset of JavaScript that compiles to clean JavaScript output.
-
TensorFlow
An Open Source Machine Learning Framework for Everyone
-
Django
The Web framework for perfectionists with deadlines.
-
Laravel
A PHP framework for web artisans
-
D3
Bring data to life with SVG, Canvas and HTML. 📊📈🎉
-
Recommend Topics
-
javascript
JavaScript (JS) is a lightweight interpreted programming language with first-class functions.
-
web
Some thing interesting about web. New door for the world.
-
server
A server is a program made to process requests and deliver data to clients.
-
Machine learning
Machine learning is a way of modeling and interpreting data that allows a piece of software to respond intelligently.
-
Visualization
Some thing interesting about visualization, use data art
-
Game
Some thing interesting about game, make everyone happy.
Recommend Org
-
Facebook
We are working to build community through open source technology. NB: members must have two-factor auth.
-
Microsoft
Open source projects and samples from Microsoft.
-
Google
Google ❤️ Open Source for everyone.
-
Alibaba
Alibaba Open Source for everyone
-
D3
Data-Driven Documents codes.
-
Tencent
China tencent open source team.
from ttf-parser.