Crate rusty_mermaid 

rusty-mermaid

Mermaid diagram rendering in pure Rust.

The base crate parses mermaid syntax and produces a Scene — a backend-agnostic intermediate representation of primitives (rects, paths, text, etc.).

Enable features to add rendering backends:

Feature	What you get
svg	to_svg() → SVG string
raster	to_png() → PNG bytes
wgpu	vello/WebGPU scene builder
gpui	gpui canvas element (Zed)
viewport	Pan/zoom state + coordinate transforms

Structs

BBox

Axis-aligned bounding box. x and y are the center coordinates (matching dagre’s convention).

Color

RGBA color.

ParseError

A parse error with location information.

Point

2D point in layout coordinate space.

Scene

Backend-agnostic drawing output. The contract between layout and rendering.

Style

Visual style for shapes and paths.

TextStyle

Text styling properties.

Theme

Diagram color theme. All rendering reads from this — no hardcoded values.

Enums

DiagramKind

Supported diagram types.

Direction

Layout direction for ranked graphs.

Primitive

A single drawing element. All backends (SVG, raster, gpui, wgpu, PDF) consume these.

TextAnchor

Text horizontal alignment.

Functions

detect

Detect the diagram type from the first non-empty, non-comment line.

render

Parse and render a mermaid diagram to a Scene.

render_to_scene

Unified entry: parse + layout → Scene.