/**
 * gasp table - Grid-fitting And Scan-conversion Procedure
 *
 * This table controls when grid-fitting (hinting) and anti-aliasing
 * should be applied based on the rendering size (ppem).
 */
import type { Reader } from "../binary/reader.ts";
/**
 * Gasp behavior flags
 */
export declare const GaspFlag: {
    /** Use grid-fitting (hinting) */
    readonly GridFit: 1;
    /** Use gray-scale rendering (anti-aliasing) */
    readonly DoGray: 2;
    /** Use symmetric grid-fitting (ClearType) */
    readonly SymmetricGridFit: 4;
    /** Use symmetric smoothing (ClearType) */
    readonly SymmetricSmoothing: 8;
};
/**
 * A ppem range with associated behavior
 */
export interface GaspRange {
    /** Maximum ppem for this range (inclusive) */
    maxPPEM: number;
    /** Behavior flags for this range */
    behavior: number;
}
/**
 * gasp table
 */
export interface GaspTable {
    /** Version (0 or 1) */
    version: number;
    /** Ranges sorted by maxPPEM */
    ranges: GaspRange[];
}
/**
 * Parse gasp table
 */
export declare function parseGasp(reader: Reader): GaspTable;
/**
 * Get behavior flags for a specific ppem
 */
export declare function getGaspBehavior(gasp: GaspTable, ppem: number): number;
/**
 * Check if grid-fitting should be used
 */
export declare function shouldGridFit(gasp: GaspTable, ppem: number): boolean;
/**
 * Check if gray-scale rendering should be used
 */
export declare function shouldDoGray(gasp: GaspTable, ppem: number): boolean;