import { ClassDefTable } from './common/classdef.ts';
import { CoverageTable } from './common/coverage.ts';
/**
 * Glyph class values as defined by the GDEF table.
 */
export declare const GlyphClass: {
    readonly Base: 1;
    readonly Ligature: 2;
    readonly Mark: 3;
    readonly Component: 4;
};
export type GlyphClass = (typeof GlyphClass)[keyof typeof GlyphClass];
/**
 * The 'GDEF' table contains glyph classification and other information
 * used by OpenType layout processing (GSUB/GPOS).
 *
 * See https://learn.microsoft.com/en-us/typography/opentype/spec/gdef
 */
export declare class GdefTable {
    /**
     * Classifies glyphs as Base (1), Ligature (2), Mark (3), or Component (4).
     * Glyphs not listed default to class 0 (undefined class).
     */
    readonly glyphClassDef: ClassDefTable | undefined;
    /**
     * Maps mark glyphs to attachment classes. Used by the
     * MARK_ATTACHMENT_CLASS_FILTER in lookup flags.
     */
    readonly markAttachClassDef: ClassDefTable | undefined;
    /**
     * Array of mark glyph sets, each defined by a CoverageTable.
     * Referenced by the USE_MARK_FILTERING_SET lookup flag.
     */
    readonly markGlyphSets: ReadonlyArray<CoverageTable> | undefined;
    /**
     * Reads a 'GDEF' table from the given DataView.
     */
    static read(data: DataView): GdefTable;
    private constructor();
    /**
     * Returns the glyph class for a given glyph ID.
     * Returns 0 if the glyph has no class assigned.
     */
    getGlyphClass(glyphId: number): number;
    /**
     * Returns the mark attachment class for a given glyph ID.
     * Returns 0 if the glyph has no mark attachment class.
     */
    getMarkAttachClass(glyphId: number): number;
    /**
     * Checks whether a glyph is in the specified mark glyph set.
     */
    isMarkInSet(glyphId: number, setIndex: number): boolean;
}