text_on_path 0.1.1

Text along any curve, a circle for a seal or any Path, with cursive scripts kept joined. Arabic, Persian and Urdu stay connected; Devanagari and Bengali keep their headline.

0.1.1

• Fixes a crash (a RangeError while shaping) for large text at a high pixel ratio, such as 140 px at 2 × the default oversample. The atlas a run is shaped with packed each cluster's cell in rows 4096 texels wide, which could stand taller than a GPU texture; the smaller image that came back was read as the size asked for. It now packs about as wide as tall and, when that wouldn't fit 8192 texels a side or 16M in all, is drawn at a lower density.
• An atlas for a zoomed view that can't be drawn falls back to the traced outlines instead of throwing.
• A shorter README: what it does, demos and links. The details move to their own pages: getting started and how it works (in doc/).
• Three more demos: selecting text on a curve, a seal filling as its joins are drawn out, and text following a curve drawn by hand.

0.1.0

• TextOnPath: text along a PathCurve (any Path, or a circular arc for a seal), cursive joins kept closed. Arabic, Persian and Urdu stay connected; Devanagari and Bengali keep their headline.
• Joined placement: letters stand rigid, and only the rows they join on follow the curve. A widened join is drawn out along the curve; a sloping one (Nastaliq, a script hand) is pulled shut. Rigid and plain-warp placements to compare.
• Fitting to a length: kashida for Arabic, tracking that draws joins out rather than opening them, or word spacing.
• Sharp at any zoom: the atlas is drawn again for the scale the text is shown at, and past a memory budget the text is drawn from traced outlines (TextOnPathRendering).
• TextOutlines and TextOnPathPlacement.toSvg / toPdf: the placed text as vectors.
• Selection inside a SelectionArea: drag, double-click a word, long-press for handles, copy. Positions come from the straight line the text was shaped as; the highlight bends with the curve and the handles turn with it.
• TextOnPathMetrics: the area of gaps and overlaps at joins, how many joins visibly open, and how far letters were distorted.