import { RpEditorConfig } from '../types/index.js';
/**
 * Default configuration values
 */
export declare const DEFAULT_CONFIG: Required<Omit<RpEditorConfig, 'maxResolution' | 'locale' | 'language' | 'labels' | 'theme' | 'onApply' | 'onClose' | 'filterPresets' | 'filterPresetLabels' | 'onImageLoaded' | 'onError' | 'onModeChanged' | 'calloutDefaults' | 'strings' | 'currentImageIndex' | 'totalImages'>> & {
    maxResolution: number | null;
    theme: NonNullable<RpEditorConfig['theme']>;
    onApply?: () => void;
    onClose?: () => void;
    filterPresets?: RpEditorConfig['filterPresets'];
    filterPresetLabels?: RpEditorConfig['filterPresetLabels'];
    onImageLoaded?: RpEditorConfig['onImageLoaded'];
    onError?: RpEditorConfig['onError'];
    onModeChanged?: RpEditorConfig['onModeChanged'];
    calloutDefaults?: RpEditorConfig['calloutDefaults'];
    strings?: RpEditorConfig['strings'];
    language?: RpEditorConfig['language'];
    labels?: RpEditorConfig['labels'];
    currentImageIndex?: RpEditorConfig['currentImageIndex'];
    totalImages?: RpEditorConfig['totalImages'];
};
/**
 * Parse a CSS color string into RGB. Supports #rgb, #rrggbb, and rgb()/rgba().
 * Returns null when the color can't be parsed (e.g. named colors, hsl()).
 */
export declare function parseColor(input: string): {
    r: number;
    g: number;
    b: number;
} | null;
/**
 * Deep merge configuration with defaults.
 *
 * When a caller customizes a background color (e.g. `toolbarBackground`) but
 * does NOT also supply the paired foreground (e.g. `toolbarIconColor`), the
 * default foreground from the light theme would silently bleed through and
 * become unreadable. To avoid that, we auto-derive a contrasting foreground
 * from the supplied background using WCAG relative luminance.
 */
export declare function mergeConfig(userConfig?: Partial<RpEditorConfig>): typeof DEFAULT_CONFIG & RpEditorConfig;