Module rasterize 

SVG string → PNG bytes rasterization using resvg.

Uses resvg (pure Rust) for SVG parsing and rasterization. Supports density/DPI scaling, white background, and configurable padding.

Font resolution

The shared font database is lazily initialized with system fonts (Liberation Sans, DejaVu, etc. on Linux) on first use. Charts that emit SVG <text> elements with named font-family values beyond the system set (e.g. 'Instrument Serif', 'DM Sans') will silently fail to render text unless those fonts are registered first.

To register additional fonts (e.g. compile-time embedded design-system fonts), call init_font_database before the first render:

let dm_sans = include_bytes!("fonts/DMSans-Regular.ttf").to_vec();
chartml_render::init_font_database(vec![dm_sans]);

If init_font_database is not called, the database initializes lazily with system fonts only — existing consumers see no behavior change.

Functions

init_font_database

Initialize the font database with system fonts plus additional font data.

svg_to_png

Rasterize an SVG string to PNG bytes.