Writing a Backend¶

Backends consume:

• An immutable Grid
• Optional Damage regions (Damage, Rect)

Backends MUST:

1. Treat Cell::Continuation as non-rendering.
2. Render wide glyphs only from the lead cell.
3. Respect the style model in Style (overlay semantics are applied by the renderer).

Backends SHOULD:

• Redraw only damaged cells when Damage is available.
• Coalesce adjacent cells into spans to reduce output churn.
• Track current style state and emit deltas rather than full resets.

Rendering Rule Summary¶

• Cell::Empty MAY be rendered as a space.
• Cells that contain glyphs are rendered as visible content.
• Continuation cells do not render glyphs.