e130af2ef4
The engine replaces a document's render pool after every edit, undo, redo, layer toggle and comment-visibility change, and drops it on close. Workers in the middle of a page kept rendering it to the end before finding that nobody could receive the answer. On heavy pages that is seconds of CPU per worker, competing with the new pool re-rendering the same pages. hayro-interpret, vendored patch 17: `InterpreterSettings::cancelled`, checked before each content operator. The pool sets it only in `Drop`, when its result channel is gone, so a partly drawn page can never be delivered. Live pools, `PageRenderer` and inline pools never set it. 7 heavy pages on 7 workers re-rendered after replacing a busy pool: 2.4–2.5 s before, 1.1 s after (1.0–1.3 s without a replacement, unchanged). Co-authored-by: Claude Opus 5.5 <noreply@anthropic.com> |
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| .. | ||
| assets | ||
| examples | ||
| src | ||
| .cargo-ok | ||
| .cargo_vcs_info.json | ||
| Cargo.lock | ||
| Cargo.toml | ||
| Cargo.toml.orig | ||
| LICENSE-APACHE | ||
| LICENSE-MIT | ||
| README.md | ||
README.md
hayro-interpret
A crate for interpreting PDF files.
This crate provides an abstraction to interpret the content of a PDF file and render them
into an abstract [Device], which clients can implement as needed. This allows you, for
example, to render PDF files to bitmaps (which is what the hayro crate does), or other formats
such as SVG.
It should be noted that this crate is still very much in development. Therefore it currently lacks pretty much any documentation on how to use it. It's current API also only really makes it useful for rendering to PNG or SVG, though this will be improved upon in the future.
Examples
See the examples folder on the GitHub repository. Apart from that, you can also consult
the implementation of hayro and hayro-svg to get an idea on how to use this crate.
Safety
This crate forbids unsafe code via a crate-level attribute.
Cargo features
This crate has one optional feature:
embed-fonts: PDF processors are required to support 14 predefined fonts that do not need to be embedded into a PDF file. If you enable this feature, hayro will embed a (permissively-licensed) substitute for each font, so that you don't have to implement your custom font loading logic. This will add around ~240KB to your binary.
License
Licensed under either of
- Apache License, Version 2.0 (LICENSE-APACHE or http://www.apache.org/licenses/LICENSE-2.0)
- MIT license (LICENSE-MIT or http://opensource.org/licenses/MIT)
at your option.