/**
 * Stroke font for chart PNG rasterisation.
 *
 * A simplified sans-serif vector font covering ASCII printable characters
 * (32–126). Each glyph is defined as a sequence of polyline strokes in a
 * normalised coordinate system where the cap-height is 1.0 and the
 * em-width is typically 0.6–0.7.
 *
 * Coordinates use a top-left origin with Y increasing downward (matching
 * pixel space). The baseline sits at y = 0.75 (from the top of the em
 * square). Descenders extend below y = 0.75 to approximately y = 1.0.
 *
 * Each glyph entry:
 *   - `w`: advance width (0–1 scale, relative to fontSize)
 *   - `d`: array of strokes, each stroke is an array of [x, y] points
 *
 * This file has NO imports — it is a pure data module.
 */
export interface StrokeGlyph {
    /** Advance width in em units. */
    w: number;
    /** Array of polyline strokes. Each stroke is an array of [x, y] coordinate pairs. */
    d: number[][][];
}
/**
 * Stroke font glyphs indexed by character code (32–126).
 *
 * Design principles:
 * - Cap height spans y ≈ 0.15 to y ≈ 0.75 (baseline)
 * - x-height (lowercase) spans y ≈ 0.35 to y ≈ 0.75
 * - Descenders go to y ≈ 0.95
 * - Ascenders reach y ≈ 0.15
 * - All strokes use straight line segments; curves are approximated with
 *   short segment sequences for a clean sans-serif appearance.
 */
export declare const STROKE_FONT: Record<number, StrokeGlyph>;