import { type DataWriter } from '../data-writer.ts';
import { TableBuilder } from '../table-builder.ts';
/**
 * The 'head' (Font Header) table contains global information about the font.
 */
export declare class HeadTable {
    /** Use version string `NameId.versionString` in name table instead. */
    readonly fontRevision: number;
    /** The adjustment value to verify the font's checksum. */
    readonly checksumAdjustment: number;
    /** Bit flags, see `HeadFlags`. */
    readonly flags: number;
    /** Valid values range from 16 to 16384. Should be a power of 2 for TrueType fonts. */
    readonly unitsPerEm: number;
    /** Creation date and time. */
    readonly created: Date;
    /** Modification date and time. */
    readonly modified: Date;
    /** Minimum x coordinate across all glyph bounding boxes. */
    readonly xMin: number;
    /** Minimum y coordinate across all glyph bounding boxes. */
    readonly yMin: number;
    /** Maximum x coordinate across all glyph bounding boxes. */
    readonly xMax: number;
    /** Maximum y coordinate across all glyph bounding boxes. */
    readonly yMax: number;
    /** Bit flags, see `MacStyle`. */
    readonly macStyle: number;
    /** Smallest readable size in pixels. */
    readonly lowestRecPPEM: number;
    /** Indicates the type of offset format used in the 'loca' table: 0: 16 bit, 1: 32 bit. */
    readonly indexToLocFormat: number;
    /**
     * Reads a 'head' table from the given DataView.
     */
    static read(data: DataView): HeadTable;
    private constructor();
}
/**
 * Builder for the 'head' table.
 */
export declare class HeadTableBuilder extends TableBuilder {
    fontRevision: number;
    flags: number;
    unitsPerEm: number;
    created: Date;
    modified: Date;
    xMin: number;
    yMin: number;
    xMax: number;
    yMax: number;
    macStyle: number;
    lowestRecPPEM: number;
    /**
     * Indicates the type of offset format used in the 'loca' table: 0: 16 bit, 1: 32 bit
     */
    indexToLocFormat: number;
    constructor(init?: HeadTable);
    writeTable(writer: DataWriter): void;
}
/**
 * Bit flags for the `macStyle` field in the 'head' table.
 */
export declare const MacStyle: {
    readonly bold: 1;
    readonly italic: 2;
    readonly underline: 4;
    readonly outline: 8;
    readonly shadow: 16;
    readonly condensed: 32;
    readonly extended: 64;
};
/**
 * Bit flags for the `flags` field in the 'head' table.
 */
export declare const HeadFlags: {
    readonly baselineAtY0: 1;
    readonly leftSideBearingAtX0: 2;
    readonly instructionsMayDependOnPointSize: 4;
    readonly forcePpemToIntegerValues: 8;
    readonly instructionsMayAlterAdvanceWidth: 16;
    readonly fontDataIsLossless: 2048;
    readonly fontConverted: 4096;
    readonly fontOptimizedForClearType: 8192;
    readonly lastResortFont: 16384;
};
export declare function toLongDateTime(date: Date): {
    hi: number;
    lo: number;
};
export declare function fromLongDateTime(hi: number, lo: number): Date;