import type { Fixed, FWord, int16, uint16, uint32 } from "../../types.ts";
import type { Reader } from "../binary/reader.ts";
/** Font header table */
export interface HeadTable {
    majorVersion: uint16;
    minorVersion: uint16;
    fontRevision: Fixed;
    checksumAdjustment: uint32;
    magicNumber: uint32;
    flags: uint16;
    unitsPerEm: uint16;
    created: bigint;
    modified: bigint;
    xMin: FWord;
    yMin: FWord;
    xMax: FWord;
    yMax: FWord;
    macStyle: uint16;
    lowestRecPPEM: uint16;
    fontDirectionHint: int16;
    /** 0 = short offsets (uint16), 1 = long offsets (uint32) in loca table */
    indexToLocFormat: int16;
    glyphDataFormat: int16;
}
/** Head table flags */
export declare const HeadFlags: {
    readonly BaselineAtY0: 1;
    readonly LeftSidebearingAtX0: 2;
    readonly InstructionsDependOnPointSize: 4;
    readonly ForcePPEMToInteger: 8;
    readonly InstructionsAlterAdvanceWidth: 16;
    readonly Lossless: 2048;
    readonly Converted: 4096;
    readonly OptimizedForClearType: 8192;
    readonly LastResortFont: 16384;
};
/** Mac style flags */
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;
};
/**
 * Parse head table - font header with global metrics
 * @param reader - Reader positioned at start of head table
 * @returns Parsed head table
 */
export declare function parseHead(reader: Reader): HeadTable;