Module shaping 

OpenType Shaping

Wraps rustybuzz to perform OpenType shaping (GSUB/GPOS) on text. This produces real glyph IDs, kerning offsets, and ligature substitutions instead of the naive char-as-u16 glyph IDs used before.

Standard PDF fonts (Helvetica, Times, Courier) bypass shaping entirely — they use WinAnsi encoding and don’t have GSUB/GPOS tables.

Structs

ShapedGlyph

A single glyph produced by OpenType shaping.

Functions

cluster_widths

Compute per-cluster widths from shaped glyphs.

shape_text

Shape text using the given font data.

shape_text_with_direction

Shape text with explicit direction control.

shape_text_with_offset

Shape a segment of text for a specific font, returning shaped glyphs and a mapping from glyph index to character range.

shaped_width

Compute the total advance width of shaped glyphs in points.