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penpot/render-wasm
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Belén Albeza e4d610d503
♻️ Decouple shapes serialization from model (rust) (#7328) 
* ♻️ Move shape type serialization to wasm module

* ♻️ Refactor serialization of constraints and vertical alignment into wasm module

* ♻️ Refactor serialization and model of shape blur

* ♻️ Refactor bool serialization to the wasm module

* ♻️ Split wasm::layout into submodules

* ♻️ Refactor serialization of AlignItems, AlignContent, JustifyItems and JustifyContent

* ♻️ Refactor serialization of WrapType and FlexDirection

* ♻️ Refactor serialization of JustifySelf

* ♻️ Refactor serialization of GridCell

* ♻️ Refactor serialization of AlignSelf

* 🐛 Fix AlignSelf not being serialized

* ♻️ Refactor handling of None variants in Raw* enums

* ♻️ Refactor serialization of grid direction

* ♻️ Refactor serialization of GridTrack and GridTrackType

* ♻️ Refactor serialization of Sizing

* ♻️ Refactor serialization of ShadowStyle

* ♻️ Refactor serialization of StrokeCap and StrokeStyle

* ♻️ Refactor serialization of BlendMode

* ♻️ Refactor serialization of FontStyle

* ♻️ Refactor serialization of GrowType
2025-09-22 13:47:54 +02:00
..
docs
♻️ Decouple shapes serialization from model (rust) (#7328)
2025-09-22 13:47:54 +02:00
macros
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
src
♻️ Decouple shapes serialization from model (rust) (#7328)
2025-09-22 13:47:54 +02:00
_build_env
✨ Add drop grid cells in wasm
2025-06-30 10:28:59 +02:00
.gitignore
✨ Rename to render-wasm and make it load using dynamic import
2024-10-23 17:18:04 +02:00
build
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
build.rs
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
Cargo.lock
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
Cargo.toml
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
lint
🎉 Update skia binares to 0.87.0
2025-08-21 07:38:46 +02:00
README.md
📚 Add schemas and links to render-wasm README
2025-06-17 14:06:46 +02:00
test
🎉 Update skia binares to 0.87.0
2025-08-21 07:38:46 +02:00
watch
🔧 Autogenerate serialization values for wasm enums (#7296)
2025-09-16 12:29:14 +02:00
watch_test
🎉 Update skia binares to 0.87.0
2025-08-21 07:38:46 +02:00

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