/**
 * TrueType rounding functions
 *
 * These implement the various rounding modes used by the interpreter.
 */
import { type F26Dot6, type GraphicsState } from "./types.ts";
/**
 * Round to grid (nearest integer pixel)
 */
export declare function roundToGrid(distance: F26Dot6, compensation: F26Dot6): F26Dot6;
/**
 * Round to half grid (nearest half pixel)
 */
export declare function roundToHalfGrid(distance: F26Dot6, compensation: F26Dot6): F26Dot6;
/**
 * Round to double grid (nearest half pixel boundary)
 */
export declare function roundToDoubleGrid(distance: F26Dot6, compensation: F26Dot6): F26Dot6;
/**
 * Round down to grid (floor to pixel)
 */
export declare function roundDownToGrid(distance: F26Dot6, compensation: F26Dot6): F26Dot6;
/**
 * Round up to grid (ceiling to pixel)
 */
export declare function roundUpToGrid(distance: F26Dot6, compensation: F26Dot6): F26Dot6;
/**
 * No rounding
 */
export declare function roundOff(distance: F26Dot6, _compensation: F26Dot6): F26Dot6;
/**
 * Super rounding (parametric rounding)
 */
export declare function roundSuper(distance: F26Dot6, compensation: F26Dot6, GS: GraphicsState): F26Dot6;
/**
 * Super rounding 45 degrees (for diagonal lines)
 */
export declare function roundSuper45(distance: F26Dot6, compensation: F26Dot6, GS: GraphicsState): F26Dot6;
/**
 * Apply current rounding mode
 */
export declare function round(distance: F26Dot6, compensation: F26Dot6, GS: GraphicsState): F26Dot6;
/**
 * Parse SROUND/S45ROUND selector byte
 */
export declare function parseSuperRound(selector: number, GS: GraphicsState): void;
/**
 * Compensate distance for engine characteristics
 * Used with ROUND and movement instructions
 */
export declare function compensate(_distance: F26Dot6, _GS: GraphicsState): F26Dot6;