/**
 * Decompose path commands into rasterizer calls
 */
import { type Contour } from "../font/tables/glyf.ts";
import { type GlyphPath } from "../render/path.ts";
import type { GrayRaster } from "./gray-raster.ts";
import { FillRule } from "./types.ts";
/**
 * Outline validation error types (like FreeType's error codes)
 */
export declare enum OutlineError {
    Ok = 0,
    InvalidOutline = 1,
    InvalidArgument = 2,
    EmptyOutline = 3
}
/**
 * Validation result with error code and message
 */
export interface ValidationResult {
    error: OutlineError;
    message?: string;
}
/**
 * Validate a GlyphPath before rasterization (like FreeType's outline validation)
 * Checks: path existence, command structure validity, and proper contour closure
 * @param path Glyph path to validate
 * @param allowEmpty Whether empty paths are considered valid (default: true)
 * @returns Validation result with error code and optional message
 */
export declare function validateOutline(path: GlyphPath | null | undefined, allowEmpty?: boolean): ValidationResult;
/**
 * Convert a GlyphPath to rasterizer commands
 * @param raster The rasterizer instance to receive commands
 * @param path Path commands to decompose
 * @param scale Scale factor (font units to pixels)
 * @param offsetX X offset in pixels (default: 0)
 * @param offsetY Y offset in pixels (default: 0)
 * @param flipY Flip Y axis - font coords are Y-up, bitmap is Y-down (default: true)
 */
export declare function decomposePath(raster: GrayRaster, path: GlyphPath, scale: number, offsetX?: number, offsetY?: number, flipY?: boolean): void;
export declare function decomposeContours(raster: GrayRaster, contours: Contour[], scale: number, offsetX?: number, offsetY?: number, flipY?: boolean): void;
export declare function getContourBounds(contours: Contour[], scale: number, flipY?: boolean, roundToGrid?: boolean): {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
} | null;
export declare function getPathBounds(path: GlyphPath, scale: number, flipY?: boolean, roundToGrid?: boolean): {
    minX: number;
    minY: number;
    maxX: number;
    maxY: number;
} | null;
/**
 * Get fill rule from outline flags (like FreeType's FT_OUTLINE_EVEN_ODD_FILL check)
 * @param path Path with optional flags
 * @param defaultRule Default fill rule if flags not set (default: NonZero)
 * @returns Fill rule to use for rendering
 */
export declare function getFillRuleFromFlags(path: GlyphPath | null | undefined, defaultRule?: FillRule): FillRule;