linebender/vello_svg

Use Vello for glyph rasterization

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#64 opened on Jun 11, 2025

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enhancementgood first issue

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Description

Currently we are using usvg's .flattened() to render text. This converts glyphs to SVG paths which we then render. It would be more efficient to use usvg's .layouted() and use Vello for glyph rendering (and this would also allow us to support conic/sweep gradients from COLRv1 emoji).

Contributor guide

Research direction
Investigate usvg's layouted() method and Vello's glyph rendering capabilities. Experiment with replacing flattened() with layouted() and integrate Vello glyph rendering.
Tech stack
rust
Domain
computer graphics
Issue type
Feature
DifficultyEstimated implementation difficulty for a new contributor, from 1 for very small changes to 5 for expert-level work.
3
Estimated timeA rough time range for an experienced contributor to investigate, implement, test, and prepare a pull request.
3-5 days
Activity statusHow available the issue appears right now: fresh, active, stale, blocked, or waiting on maintainer input.
Fresh
ClarityHow clearly the issue explains the expected change, acceptance criteria, and next step.
Clear
Prerequisites
Rust
Newbie friendlinessA 1-100 score estimating how approachable this issue is for first-time contributors.
45