import type { ShapeFeature } from "./shape-plan.ts";
/**
 * Feature helper utilities
 * Provides convenient APIs for enabling OpenType features
 */
/**
 * Create a ShapeFeature for a stylistic set (ss01-ss20)
 */
export declare function stylisticSet(setNumber: number, enabled?: boolean): ShapeFeature;
/**
 * Create ShapeFeatures for multiple stylistic sets
 */
export declare function stylisticSets(setNumbers: number[], enabled?: boolean): ShapeFeature[];
/**
 * Create a ShapeFeature for a character variant (cv01-cv99)
 */
export declare function characterVariant(variantNumber: number, enabled?: boolean): ShapeFeature;
/**
 * Create ShapeFeatures for multiple character variants
 */
export declare function characterVariants(variantNumbers: number[], enabled?: boolean): ShapeFeature[];
/**
 * Standard ligatures (liga)
 */
export declare function standardLigatures(enabled?: boolean): ShapeFeature;
/**
 * Discretionary ligatures (dlig)
 */
export declare function discretionaryLigatures(enabled?: boolean): ShapeFeature;
/**
 * Historical ligatures (hlig)
 */
export declare function historicalLigatures(enabled?: boolean): ShapeFeature;
/**
 * Contextual alternates (calt)
 */
export declare function contextualAlternates(enabled?: boolean): ShapeFeature;
/**
 * Stylistic alternates (salt)
 */
export declare function stylisticAlternates(enabled?: boolean): ShapeFeature;
/**
 * Swash (swsh)
 */
export declare function swash(enabled?: boolean): ShapeFeature;
/**
 * Small capitals (smcp)
 */
export declare function smallCaps(enabled?: boolean): ShapeFeature;
/**
 * Capitals to small capitals (c2sc)
 */
export declare function capsToSmallCaps(enabled?: boolean): ShapeFeature;
/**
 * Petite capitals (pcap)
 */
export declare function petiteCaps(enabled?: boolean): ShapeFeature;
/**
 * All small capitals (both smcp and c2sc)
 */
export declare function allSmallCaps(enabled?: boolean): ShapeFeature[];
/**
 * Oldstyle figures (onum)
 */
export declare function oldstyleFigures(enabled?: boolean): ShapeFeature;
/**
 * Lining figures (lnum)
 */
export declare function liningFigures(enabled?: boolean): ShapeFeature;
/**
 * Proportional figures (pnum)
 */
export declare function proportionalFigures(enabled?: boolean): ShapeFeature;
/**
 * Tabular figures (tnum)
 */
export declare function tabularFigures(enabled?: boolean): ShapeFeature;
/**
 * Fractions (frac)
 */
export declare function fractions(enabled?: boolean): ShapeFeature;
/**
 * Ordinals (ordn)
 */
export declare function ordinals(enabled?: boolean): ShapeFeature;
/**
 * Slashed zero (zero)
 */
export declare function slashedZero(enabled?: boolean): ShapeFeature;
/**
 * Superscript (sups)
 */
export declare function superscript(enabled?: boolean): ShapeFeature;
/**
 * Subscript (subs)
 */
export declare function subscript(enabled?: boolean): ShapeFeature;
/**
 * Scientific inferiors (sinf)
 */
export declare function scientificInferiors(enabled?: boolean): ShapeFeature;
/**
 * Case-sensitive forms (case)
 */
export declare function caseSensitiveForms(enabled?: boolean): ShapeFeature;
/**
 * Capital spacing (cpsp)
 */
export declare function capitalSpacing(enabled?: boolean): ShapeFeature;
/**
 * Kerning (kern)
 */
export declare function kerning(enabled?: boolean): ShapeFeature;
/**
 * Vertical forms (vert) - for vertical text layout
 */
export declare function verticalForms(enabled?: boolean): ShapeFeature;
/**
 * Vertical alternates and rotation (vrt2) - for vertical text layout
 */
export declare function verticalAlternatesRotation(enabled?: boolean): ShapeFeature;
/**
 * Vertical Kana alternates (vkna) - for Japanese vertical text
 */
export declare function verticalKanaAlternates(enabled?: boolean): ShapeFeature;
/**
 * All vertical layout features
 */
export declare function verticalLayoutFeatures(enabled?: boolean): ShapeFeature[];
/**
 * Ruby notation forms (ruby)
 */
export declare function ruby(enabled?: boolean): ShapeFeature;
/**
 * Half-width forms (hwid)
 */
export declare function halfWidthForms(enabled?: boolean): ShapeFeature;
/**
 * Full-width forms (fwid)
 */
export declare function fullWidthForms(enabled?: boolean): ShapeFeature;
/**
 * Proportional-width forms (pwid)
 */
export declare function proportionalWidthForms(enabled?: boolean): ShapeFeature;
/**
 * Quarter-width forms (qwid)
 */
export declare function quarterWidthForms(enabled?: boolean): ShapeFeature;
/**
 * Third-width forms (twid)
 */
export declare function thirdWidthForms(enabled?: boolean): ShapeFeature;
/**
 * JIS78 forms (jp78) - Japanese
 */
export declare function jis78Forms(enabled?: boolean): ShapeFeature;
/**
 * JIS83 forms (jp83) - Japanese
 */
export declare function jis83Forms(enabled?: boolean): ShapeFeature;
/**
 * JIS90 forms (jp90) - Japanese
 */
export declare function jis90Forms(enabled?: boolean): ShapeFeature;
/**
 * JIS2004 forms (jp04) - Japanese
 */
export declare function jis2004Forms(enabled?: boolean): ShapeFeature;
/**
 * Simplified forms (smpl) - Chinese
 */
export declare function simplifiedForms(enabled?: boolean): ShapeFeature;
/**
 * Traditional forms (trad) - Chinese
 */
export declare function traditionalForms(enabled?: boolean): ShapeFeature;
/**
 * Create a feature from a 4-character tag string
 */
export declare function feature(tagStr: string, enabled?: boolean): ShapeFeature;
/**
 * Create multiple features from tag strings
 */
export declare function features(tagStrs: string[], enabled?: boolean): ShapeFeature[];
/**
 * Combine multiple feature sets
 */
export declare function combineFeatures(...featureSets: (ShapeFeature | ShapeFeature[])[]): ShapeFeature[];