/**
 * Supported image MIME types
 */
export declare const SUPPORTED_IMAGE_TYPES: readonly ["image/jpeg", "image/png", "image/gif", "image/webp", "image/svg+xml", "image/bmp"];
export type SupportedImageType = (typeof SUPPORTED_IMAGE_TYPES)[number];
/**
 * Validation result for image files
 */
export interface ImageValidationResult {
    valid: boolean;
    error?: string;
    mimeType?: string;
}
/**
 * Validates an image file by MIME type
 *
 * @param file - The file to validate
 * @param allowedTypes - Optional array of allowed MIME types (defaults to SUPPORTED_IMAGE_TYPES)
 * @returns Validation result with error message if invalid
 *
 * @example
 * ```tsx
 * const handleFileSelect = (e: React.ChangeEvent<HTMLInputElement>) => {
 *   const file = e.target.files?.[0];
 *   if (!file) return;
 *
 *   const result = validateImageFile(file);
 *   if (!result.valid) {
 *     alert(result.error);
 *     return;
 *   }
 *
 *   const url = URL.createObjectURL(file);
 *   // Use the url with image editor
 * };
 * ```
 */
export declare function validateImageFile(file: File, allowedTypes?: readonly string[]): ImageValidationResult;
/**
 * Creates a validated object URL from a file
 *
 * @param file - The file to create URL from
 * @param allowedTypes - Optional array of allowed MIME types
 * @returns Object URL if valid, null if invalid
 *
 * @example
 * ```tsx
 * const handleFileSelect = async (e: React.ChangeEvent<HTMLInputElement>) => {
 *   const file = e.target.files?.[0];
 *   const result = createValidatedImageURL(file);
 *
 *   if (!result.url) {
 *     alert(result.error);
 *     return;
 *   }
 *
 *   setImageUrl(result.url);
 * };
 * ```
 */
export declare function createValidatedImageURL(file: File | null | undefined, allowedTypes?: readonly string[]): {
    url: string | null;
    error?: string;
    mimeType?: string;
};