Tesserae Engine
A GPU-rendered retained-mode UI engine for Python, written in Rust.
Tesserae Engine (imported as tre) gives Python the building blocks of a desktop UI — nodes, flexbox
and grid layout, paint, animation, input and events, text, accessibility, layers,
and threading — and renders them on the GPU, redrawing only what changed, with
vello_gpu, laid out by
taffy, shaped by
parley, and exposed to screen
readers through AccessKit.
It has no widgets and no theme of its own. A framework built on it — Tesserae is the first — turns the blocks into buttons, dialogs, and design systems.
from tre import App, Window
window = Window(width=320, height=120, title="Hello")
button = window.create("box", width=120, height=40, corner_radius=20,
fill=(0x67, 0x50, 0xA4, 0xFF), role="button",
label="Say hello", focusable=True)
button.on("click", lambda: print("hello"))
window.root.add_child(button)
app = App()
app.add_window(window)
app.run()
Installing
pip install tesserae-engine
On PyPI it's tesserae-engine (the name tre there is another
project's); you still import tre. Wheels cover CPython 3.9+ on Linux
(x86_64), macOS (arm64), and Windows (x64); other platforms build from
source. See
Installation for the
details.
Documentation
The guide, API reference, and migration notes are at
mindderivative.github.io/tre, and
their source is in docs/,
built with MkDocs:
pip install mkdocs mkdocs-material
mkdocs serve # http://127.0.0.1:8000
Start with Getting Started, then the guide's page for each building block; Building a Widget puts them together. Upgrading from 0.3.5? See Upgrading to 0.4.x; from 0.3.4, Migrating to 0.3.5.
Building from source
python -m venv .venv
source .venv/bin/activate # .venv\Scripts\activate on Windows
pip install maturin
maturin develop --release -m crates/engine-py/Cargo.toml
python examples/switch.py
Each script in examples/ is a small, runnable demonstration
of one building block.
Development
cargo test --workspace --release
cargo clippy --workspace --all-targets --release -- -D warnings
cargo fmt --all --check
pytest tests/
mkdocs build --strict
mypy --strict python/tre
cargo +1.90 check --workspace --all-targets # MSRV
Every rendering capability has a headless, GPU-backed pixel test under
crates/engine-render/tests/, and the Python suite drives input and time
headlessly through window.simulate and window.advance.
ARCHITECTURE.md is the design reference, and
BUILD_TRACKER.md tracks the current 0.4.x line; the
milestone-by-milestone history through v0.3.5.2 is in
BUILD_TRACKER_ARCHIVE_0.3.md.
Tesserae Engine is a from-scratch second iteration of an earlier Vulkan engine,
archived under archive/ with its lessons learned.
1 maintainer
Metadata
1 maintainer
Release files for tesserae-engine 0.4.2
For a detailed explanation of source distributions (sdists) and built distributions (wheels), please see the package formats documentation.
Source distribution (sdist)
| File | Size | Uploaded | |
|---|---|---|---|
| tesserae_engine-0.4.2.tar.gz | 2.4 MB | Details |
Built distributions (wheels)
Total release size: 203.6 MB
Release files / tesserae_engine-0.4.2.tar.gz
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| Tags | Source |
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