gridaco/nothing

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Última atividade de origem registrada: 24 de julho de 2026 às 10:35

Catálogo do SkillsMP atualizado: 26 de outubro de 2026 às 11:37

skills coletadas: 14

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<p align="center"> <img src="./assets/logo.svg" alt="Nothing" width="474"> </p> # n0 **Nothing but drawing.** A 2D graphics engine that speaks the Web — browser-grade rendering, without a browser. `n0` (pronounced "nothing") turns SVG and HTML/CSS into exact pixels: from a command line, from a library, and eventually onto an editable realtime canvas. No scripting, no navigation, no network, no user agent. ## The claim n0 is the renderer half of a browser — embeddable, deterministic, and eventually editable. There is no agent half: | n0 refuses | which buys | | ---------------------- | ------------------------------------------------------------------ | | scripting | determinism — same input, same declared time, same bytes | | navigation & network | one binary, no sandbox, no headless flags, no 200MB download | | the user-agent surface | a small attack surface and a core you can embed | | an ambient clock | frame-exact animation — dropped frames are structurally impossible | ## What it's for - **Deterministic Web rendering.** SVG and HTML/CSS to exact pixels — in CI, in a container, on a machine that will never have a browser. Same input, same declared time, same bytes. - **Animation as exact time.** A source compiles once and is sampled at a declared signed-nanosecond instant. An exported sequence has no frame to drop. - **Realtime on heavy documents.** 60+ fps where an entire page is one frame inside an infinite canvas — panning, zooming, editing. - **Layout we own.** Browser-grade layout is where general-purpose layout libraries stop. Taffy carries flex until it doesn't. - **One engine, everywhere.** Native and WebAssembly, single-threaded — no worker threads to hide behind. ## The pipeline One document, one cascade, one compiler, one contract, one kernel. ```text source bytes (.svg | .html) → one namespace-aware document csscascade → one Stylo cascade csscascade → effective values: Base | Sample t websem → rframe::Frame websem → resolve → drawlist → paint n0 ``` Each stage owns one decision. `csscascade` resolves values and decides no meaning; `websem` decides what will and will not render, and never touches a canvas; `rframe` is a vocabulary whose value is what it _cannot_ express; `n0` decides how to get pixels, never what they mean. Two pieces are borrowed on purpose. The cascade is **Stylo** — Firefox's style engine, pinned to an upstream revision, not a CSS subset written here. The rasterizer is **Skia** — the same one Chromium rasterizes with, which is much of why byte-exact comparison against a Chromium bake is a reasonable bar at all. n0 is the architecture between them: it owns resolution, the drawlist, damage, caching, and time. It owns no cascade and no rasterizer. ## Declared holes, never guessed pixels The engine refuses loudly, or it names the hole. It never guesses. ```console $ # best-effort (the default): render what is admitted, declare the rest by name $ cargo run -q -p n0_cli --bin n0 -- fixtures/test-svg/probe/polygon-fill-probe.svg out.png 64x64 degraded: skipped svg/polygon[1]: unsupported element <polygon> rendered fixtures/test-svg/probe/polygon-fill-probe.svg -> out.png (64x64, base-shared-frame, 1 degraded, 223 bytes) $ # --strict: refuse on the first construct outside the slice $ cargo run -q -p n0_cli --bin n0 -- fixtures/test-svg/probe/polygon-fill-probe.svg out.png 64x64 --strict error: render failed: unsupported element <polygon> ``` Where nothing degrades, the two admissions are frame-identical, and a law checks that across the whole corpus. ```sh # a whole composition — containers, curves, strokes, one animated rect — # rendered at its authored state, and at exactly one second cargo run -p n0_cli --bin n0 -- \ fixtures/web-first/animation/svg-scene-cub-animation.svg cub.png 96x96 cargo run -p n0_cli --bin n0 -- \ fixtures/web-first/animation/svg-scene-cub-animation.svg cub-1s.png 96x96 \ --time-ns 1000000000 ``` ## Where it is today The Web path renders a standalone SVG, or an HTML document's first inline SVG: `<rect>`, `<circle>`, `<ellipse>`, `<path>` and `<line>` — filled and stroked — nested in `<g>` with the whole `transform` grammar; root sizing per SVG2 §8.2 with the full `preserveAspectRatio` grammar; and one exact-time `<animate>`. [`crates/n0_cli/README.md`](./crates/n0_cli/README.md) is the statement of record for that slice and what it refuses. Its corpus is 77 Chromium-baked cells and 10 sampled frames, byte-exact except six curved cells carrying a declared tolerance confined to the weighted rational conic. That describes one enumerated corpus — **it is not a conformance claim**, and no conformance score exists. Not admitted yet: text, gradients, clips, masks, filters, and opacity. Not built yet: any layout engine, any editor host, any WebAssembly target. **Nothing here is published.** There are no releases, and the only shipped artifact in the tree is the frozen v1 wasm package. Run it from a clone — [setup](./docs/contributing/setup.md). ## One pipeline 2D has no perceptual slack: a 40px icon is either right or visibly wrong, and no level-of-detail trick hides it. So there is no fast renderer beside an exact one. Static is the same pipeline with an empty temporal input set — no camera delta, no previous frame, no dirty set. Realtime is the same pipeline allowed to reuse. > Modes may differ in **when and at what quality** they paint — never in **what > things mean**. The architecture that makes realtime possible ships from day one; the optimizations it needs ship only once measured. So the sockets ship empty: `DirtyClass` classifies every operation's invalidation in `n0-model`, and the engine references it exactly zero times. It full-resolves every frame until correctness has earned the right to reuse. ## The laws - **Never a silent wrong pixel.** Refuse, or name the hole. - **A module's identity is what it refuses**, and the refusal has a guarding test. `rframe` cannot express a gradient. `animation-sampling` owns no clock. `n0_cli` is architecturally forbidden from calling the renderer it replaced. - **Reuse ≡ fresh.** Any frame produced with reuse is byte-identical to the same frame produced from scratch. - **The oracle is external.** Chromium, or declared consensus. Never this engine's other half. Stylo bounds what can be _supported_; a gap there is a declared hole, never a wrong pixel. ## Why the Web first The destination is n0's own source language — SVG with layout, reimagined. It is deliberately not being built yet. The Web is the only 2D graphics specification that is frozen, adversarially tested, and ships with a free executable oracle. A custom format has none of that. On the Web path every correctness question has an answer before anyone has an opinion — and the cascade, layout, paint, text, and animation built to satisfy it are the same ones the format will stand on. The format is not deprioritized. It is waiting for a bar that can grade it. ## Also in this tree **A second engine.** [`crates/grida`](./crates/grida/README.md) is the mature v1: 19 node types, gradients, image filters, shadows, masks, PDF and SVG export, and a realtime estate benchmarked to 135K-node documents. It ships as `@grida/canvas-wasm` and is frozen there. It is being succeeded, not extended — its know-how migrates into n0 through contracts, never by copying, and the measurements in [`docs/wg/feat-2d/optimization.md`](./docs/wg/feat-2d/optimization.md) are the best existing description of what a realtime 2D engine actually needs. **Two custom formats, parked.** `.grida` (the v1 FlatBuffers binary) is frozen and read-only. `.n0.xml` (the authored source language) builds and is tested, and is deliberately not being expanded. Both are waiting on the same thing: a foundation proven against an oracle that can grade it. ## Workspace The Web path — `csscascade` → `websem` → `rframe` → `n0`: | crate | | | ------------------------------------------------------------------------- | ------------------------------------------------------------ | | [`csscascade`](./crates/csscascade/README.md) | the Stylo bridge — one namespace-aware document, one cascade | | [`websem`](./crates/websem/README.md) | the Web semantic compiler — what will and will not render | | [`rframe`](./crates/rframe/README.md) | the resolved render contract — backend-free, provisional | | [`animation-sampling`](./crates/animation-sampling/README.md) | the time axis — no ambient clock | | [`n0`](./crates/n0/README.md) · [`n0-model`](./crates/n0-model/README.md) | the engine, and its skia-free model | | [`n0_cli`](./crates/n0_cli/README.md) | the `n0` binary | The v1 engine and its satellites: `grida`, `htmlcss`, `cg`, `grida_editor`, `grida-canvas-wasm`, `grida_dev`, `grida_wpt`. Foundations: `math2`, `fonts`. The full map is in [AGENTS.md](./AGENTS.md). ## Docs [`docs/wg/`](./docs/wg/index.md) is the engine's working group — normative specifications, domain studies, and research, including 41 documents on Chromium's rendering architecture. Start at [the consolidation program](./docs/wg/consolidation/index.md) for how the two engines become one. Rust-first Cargo workspace. Project-authored code is licensed under [MIT](./LICENSE-MIT) or [Apache-2.0](./LICENSE-APACHE), at your option. Third-party material remains under its identified notice or license terms, including the [Skia-derived Web geometry metric](./crates/websem/NOTICE.md).

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Desenvolvedores de software Analistas de garantia de qualidade de software e testadores Desenvolvedores web

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Query images with a local Ollama vision model without loading the image into the main agent context. Use when you need to describe a screenshot, check whether rendered content is present, detect overlapping elements, or ask any visual question about a…

Idioma do texto original: inglês

2026-07-17

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