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penpot/render-wasm
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Andrey Antukh 857c666022 ⬆️ Update pnpm to 12.16.1 and node to 24.22.2 
pnpm 12.5.1 -> 12.16.1: the tarball pin of docker/devenv and of the
media-processor, exporter and mcp images, the packageManager field of
every workspace manifest, and the lockfile metadata of the 11
workspaces. The new pnpm also normalizes one engine range per lockfile
(>=18.* to >=18).

node 24.21.0 -> 24.22.2: devenv NODE_VERSION and both NODE_SHA256,
.nvmrc, and the runtime pin of the two plugins-deploy workflows. The
dhi.io image tags stay as they are until their digests are available.

AI-assisted-by: deepseek-v4.1-flash
2026-10-29 14:09:54 +00:00
..
docs
✨ Add single-file export to PDF using the WebGL render (#9860)
2026-06-11 10:41:21 +02:00
macros
🎉 Add background blur for wasm render
2026-03-18 18:05:30 +01:00
src
🐛 Fix background blur clipping (#11532)
2026-09-07 15:51:27 +02:00
_build_env
✨ Add rust toolchain setup on rust scripts (#12237)
2026-10-09 09:54:55 +02:00
.gitignore
✨ Rename to render-wasm and make it load using dynamic import
2024-10-23 17:18:04 +02:00
build
Merge remote-tracking branch 'origin/staging' into develop
2025-12-12 12:16:41 +01:00
build.rs
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
Cargo.lock
✨ Create wasm_error macro to handle Wasm errors differentiating critical vs recoverable
2026-03-09 07:22:32 +01:00
Cargo.toml
✨ Add single-file export to PDF using the WebGL render (#9860)
2026-06-11 10:41:21 +02:00
lint
🎉 Update skia version
2026-02-25 10:30:29 +01:00
package.json
⬆️ Update pnpm to 12.16.1 and node to 24.22.2
2026-10-29 14:09:54 +00:00
pnpm-lock.yaml
⬆️ Update pnpm to 12.16.1 and node to 24.22.2
2026-10-29 14:09:54 +00:00
pnpm-workspace.yaml
🔧 Remove legacy pnpm build key and clarify updating doc
2026-09-09 11:45:00 +02:00
README.md
✨ Add single-file export to PDF using the WebGL render (#9860)
2026-06-11 10:41:21 +02:00
test
✨ Add rust toolchain setup on rust scripts (#12237)
2026-10-09 09:54:55 +02:00
watch
✨ Add rust toolchain setup on rust scripts (#12237)
2026-10-09 09:54:55 +02:00
watch_test
🎉 Update skia version
2026-02-25 10:30:29 +01:00

README.md

Penpot WASM render

This is the canvas-based WebAssembly render engine for Penpot.

Rust & Emscripten

This project is a Rust crate that targets Emscripten (wasm32-unknown-emscripten).

We use wasm32-unknown-emscripten compilation target:

  • It compiles Rust code into WASM
  • It generates the JavaScript code (“glue”) to load and run the WASM code

How Rust, Emscripten, and WASM are connected

Skia

We use Skia, an Open Source 2D graphics library. In particular, the render engine uses Skia via custom binaries of the rust-skia crate.

How to build

With the Penpot Development Environment running, create a new tab in the tmux.

cd penpot/render-wasm
./build

You can also use ./watch to run the build on every change.

The build script will compile the project and copy the .js and .wasm files to their correct location within the frontend app.

Architecture overview

Edit your local frontend/resources/public/js/config.js to add the following flags:

  • enable-feature-render-wasm to enable this render engine.
  • enable-render-wasm-dpr (optional), to enable using the device pixel ratio.

How to test

We currently have two types of tests:

  • Unit tests
cd penpot/render-wasm
./test

Technical documentation