/**
 * The Coverage table indicates the glyphs that are involved in
 * substitution or positioning.
 */
export declare abstract class CoverageTable {
    private lookupCache;
    static read(data: DataView): CoverageTable1 | CoverageTable2;
    /**
     * Looks up the glyph ID in the coverage table.
     */
    lookupGlyphId(glyphId: number): number;
    protected abstract _lookupGlyphId(glyphId: number): number;
}
declare class CoverageTable1 extends CoverageTable {
    private readonly glyphIds;
    constructor(glyphIds: number[]);
    protected _lookupGlyphId(glyphId: number): number;
}
declare class CoverageTable2 extends CoverageTable {
    private readonly glyphRanges;
    constructor(glyphRanges: {
        start: number;
        end: number;
        startCoverageIndex: number;
    }[]);
    protected _lookupGlyphId(glyphId: number): number;
}
export {};