typst / typst/typst

Artefacts in assembled stretched glyphs

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bug math
Dominant language
Rust
Stars
56.1k
Forks
1.7k
Avg merge
3d 10h
Merged PRs (30d)
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Description

Description

When assembled glyphs are built (via stretch, lr, underbrace or similar), the rendered PNG contains small artefacts where the glyph parts connect. This is especially visible in low resolutions, e.g. in the example for the underbracket docs.

300ppi 1000ppi (only small bumps visible)
image image

At some zoom levels, this is also be visible in PDF and SVG, probably depending on the viewer (e.g. in VSCode using "vscode-pdf" and "Svg Preview").

Reproduction URL

No response

Operating system

Web app, Windows

Typst version
  • I am using the latest version of Typst

Contributor guide

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First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Research direction

Start by reproducing the artefacts with the underbracket documentation example at low and high resolutions, then compare the PNG, PDF, and SVG output. Trace the assembled-glyph rendering path for stretch, lr, and underbrace; done means the visible connection artefacts are removed across the reported output formats and resolutions.

Written by the indexing model from the issue text.

Assessment

Tech stack
rust
Domain
computer-graphics
Issue type
Bug
Difficulty
4/5
Estimated time
3-5 days
Activity status
Stale
Clarity
Mostly clear
Newbie friendliness
35/100

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