import { Readable } from 'node:stream';
import { F as File, g as FileReturn, B as BaseStorage } from "../packem_shared/storage.d-C9EdfTf1.js";
import { I as ImageTransformerConfig, T as TransformResult, R as ResizeOptions, C as CropOptions, g as RotateOptions, h as ImageFormat, i as TransformOptions, S as SharpenOptions, j as BlurOptions, k as MedianOptions, l as CLAHEOptions, m as ConvolveOptions, n as ThresholdOptions, o as BooleanOptions, L as LinearOptions, p as RecombineOptions, q as ModulateOptions, r as TintOptions, G as GreyscaleOptions, s as ColourspaceOptions, E as ExtractChannelOptions, J as JoinChannelOptions, t as BandboolOptions, u as AffineOptions, D as DilateOptions, v as ErodeOptions, P as PipelineColourspaceOptions, w as ToColourspaceOptions, x as RemoveAlphaOptions, y as EnsureAlphaOptions, z as TransformationStep, B as BaseTransformer } from "../packem_shared/types.d-D1TIRqKW.js";
import 'node:timers';
import 'node:crypto';
import 'node:http';
import 'lru-cache';
/**
 * Image transformer that uses storage backends to retrieve and transform images.
 * @template TFile The file type used by this transformer.
 * @template TFileReturn The return type for file retrieval operations.
 *
 * Supports URL-based transformations with query parameters for on-demand image processing.
 * @example
 * ```ts
 * const transformer = new ImageTransformer(storage, {
 *   maxImageSize: 10 * 1024 * 1024, // 10MB
 *   cache: new Map()
 * });
 *
 * // Programmatic usage - resize an image
 * const result = await transformer.resize('image-id', {
 *   width: 800,
 *   height: 600,
 *   fit: 'cover'
 * });
 *
 * // URL-based transformations
 * // GET /files/image-id?width=300&height=200&fit=cover&quality=80
 * // GET /files/image-id?width=800&quality=90&lossless=true
 * ```
 *
 * ## Supported Query Parameters
 *
 * - `width`: Width in pixels (Number)
 * - `height`: Height in pixels (Number)
 * - `fit`: Resize fit mode - cover/contain/fill/inside/outside
 * - `position`: Position for cover/contain fits - center/top/right/bottom/left etc.
 * - `quality`: Quality for JPEG/WebP (0-100)
 * - `lossless`: Use lossless compression for WebP (Boolean)
 * - `effort`: CPU effort for AVIF (0-10, higher = slower but better)
 * - `alphaQuality`: Quality of alpha layer for WebP (0-100)
 * - `loop`: GIF animation iterations, 0 for infinite (Number)
 * - `delay`: GIF delay between frames in milliseconds (Number)
 */
declare class ImageTransformer<TFile extends File = File, TFileReturn extends FileReturn = FileReturn> extends BaseTransformer<ImageTransformerConfig, TransformResult<TFileReturn>, TFile, TFileReturn> {
  /**
   * Creates a new ImageTransformer instance.
   * @param storage The storage backend for retrieving and storing image files.
   * @param config Configuration options for image transformation including cache settings and size limits.
   */
  constructor(storage: BaseStorage<TFile, TFileReturn>, config?: ImageTransformerConfig);
  /**
   * Returns a sharp() invocation that applies the transformer's configured decompression-bomb defenses.
   */
  private openImage;
  /**
   * Resizes an image to specified dimensions with optional fit mode.
   * @param fileId Unique identifier of the image file to resize.
   * @param options Resize options including width, height, and fit mode.
   * @returns Promise resolving to transformed image result.
   */
  resize(fileId: string, options: ResizeOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Crops an image to the specified region.
   * @param fileId Unique identifier of the image file to crop.
   * @param options Crop options including region coordinates.
   * @returns Promise resolving to transformed image result.
   */
  crop(fileId: string, options: CropOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Rotates an image by the specified angle.
   * @param fileId Unique identifier of the image file to rotate.
   * @param options Rotate options including angle.
   * @returns Promise resolving to transformed image result.
   */
  rotate(fileId: string, options: RotateOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Converts an image to the specified format.
   * @param fileId Unique identifier of the image file to convert.
   * @param format Target image format (e.g., "jpeg", "png", "webp").
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  convertFormat(fileId: string, format: ImageFormat, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies sharpening filter to an image.
   * @param fileId Unique identifier of the image file to sharpen.
   * @param options Sharpen options including sigma and flat/jagged threshold.
   * @returns Promise resolving to transformed image result.
   */
  sharpen(fileId: string, options?: SharpenOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies blurring filter to an image.
   * @param fileId Unique identifier of the image file to blur.
   * @param options Blur options including sigma.
   * @returns Promise resolving to transformed image result.
   */
  blur(fileId: string, options?: BlurOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies median filter to an image for noise reduction.
   * @param fileId Unique identifier of the image file to process.
   * @param options Median filter options including radius.
   * @returns Promise resolving to transformed image result.
   */
  median(fileId: string, options?: MedianOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies CLAHE (Contrast Limited Adaptive Histogram Equalization) to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options CLAHE options including width, height, and maxSlope.
   * @returns Promise resolving to transformed image result.
   */
  clahe(fileId: string, options?: CLAHEOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies convolution kernel to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Convolve options including kernel matrix.
   * @returns Promise resolving to transformed image result.
   */
  convolve(fileId: string, options: ConvolveOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies thresholding to an image to create a binary image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Threshold options including threshold value.
   * @returns Promise resolving to transformed image result.
   */
  threshold(fileId: string, options?: ThresholdOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies boolean operation to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Boolean operation options including operator and operand.
   * @returns Promise resolving to transformed image result.
   */
  boolean(fileId: string, options: BooleanOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies linear transformation to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Linear transformation options including a and b coefficients.
   * @returns Promise resolving to transformed image result.
   */
  linear(fileId: string, options: LinearOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies recombine transformation to an image using a matrix.
   * @param fileId Unique identifier of the image file to process.
   * @param options Recombine options including matrix coefficients.
   * @returns Promise resolving to transformed image result.
   */
  recombine(fileId: string, options: RecombineOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies modulation (brightness, saturation, hue) to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Modulate options including brightness, saturation, and hue.
   * @returns Promise resolving to transformed image result.
   */
  modulate(fileId: string, options: ModulateOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies tinting to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Tint options including RGB color values.
   * @returns Promise resolving to transformed image result.
   */
  tint(fileId: string, options: TintOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Converts an image to greyscale.
   * @param fileId Unique identifier of the image file to convert.
   * @param options Greyscale conversion options.
   * @returns Promise resolving to transformed image result.
   */
  greyscale(fileId: string, options?: GreyscaleOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Converts an image to a different colourspace.
   * @param fileId Unique identifier of the image file to convert.
   * @param options Colourspace conversion options including target colourspace.
   * @returns Promise resolving to transformed image result.
   */
  colourspace(fileId: string, options: ColourspaceOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Extracts a specific channel from an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Extract channel options including channel index.
   * @returns Promise resolving to transformed image result.
   */
  extractChannel(fileId: string, options: ExtractChannelOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Joins channels to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Join channel options including channel sources.
   * @returns Promise resolving to transformed image result.
   */
  joinChannel(fileId: string, options: JoinChannelOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies band boolean operation to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Band boolean options including operator.
   * @returns Promise resolving to transformed image result.
   */
  bandbool(fileId: string, options: BandboolOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Auto-orients an image based on EXIF orientation data.
   * @param fileId Unique identifier of the image file to orient.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  autoOrient(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Flips an image vertically.
   * @param fileId Unique identifier of the image file to flip.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  flip(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Flops an image horizontally.
   * @param fileId Unique identifier of the image file to flop.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  flop(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Flattens an image alpha channel onto a background color.
   * @param fileId Unique identifier of the image file to flatten.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  flatten(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Unflattens an image alpha channel.
   * @param fileId Unique identifier of the image file to unflatten.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  unflatten(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies gamma correction to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  gamma(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Negates (inverts) an image.
   * @param fileId Unique identifier of the image file to negate.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  negate(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Normalises an image by enhancing contrast.
   * @param fileId Unique identifier of the image file to normalise.
   * @param options Additional transform options.
   * @returns Promise resolving to transformed image result.
   */
  normalise(fileId: string, options?: TransformOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies affine transformation to an image.
   * @param fileId Unique identifier of the image file to transform.
   * @param options Affine transformation options including matrix.
   * @returns Promise resolving to transformed image result.
   */
  affine(fileId: string, options: AffineOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies dilation (morphological operation) to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Dilate options including iterations.
   * @returns Promise resolving to transformed image result.
   */
  dilate(fileId: string, options?: DilateOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies erosion (morphological operation) to an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Erode options including iterations.
   * @returns Promise resolving to transformed image result.
   */
  erode(fileId: string, options?: ErodeOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Sets pipeline colourspace for an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options Pipeline colourspace options including colourspace.
   * @returns Promise resolving to transformed image result.
   */
  pipelineColourspace(fileId: string, options: PipelineColourspaceOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Converts colourspace of an image.
   * @param fileId Unique identifier of the image file to convert.
   * @param options ToColourspace options including target colourspace.
   * @returns Promise resolving to transformed image result.
   */
  toColourspace(fileId: string, options: ToColourspaceOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Removes alpha channel from an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options RemoveAlpha transformation options.
   * @returns Promise resolving to transformed image result.
   */
  removeAlpha(fileId: string, options?: RemoveAlphaOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Ensures alpha channel exists in an image.
   * @param fileId Unique identifier of the image file to process.
   * @param options EnsureAlpha transformation options.
   * @returns Promise resolving to transformed image result.
   */
  ensureAlpha(fileId: string, options?: EnsureAlphaOptions): Promise<TransformResult<TFileReturn>>;
  /**
   * Applies a custom transformation pipeline to an image.
   * @param fileId Unique identifier of the image file to transform.
   * @param steps Array of transformation steps to apply in sequence.
   * @returns Promise resolving to transformed image result.
   */
  transform(fileId: string, steps: TransformationStep[]): Promise<TransformResult<TFileReturn>>;
  /**
   * Streams transform of a file (for large files, falls back to regular transform).
   * @param fileId Unique identifier of the image file to transform.
   * @param steps Array of transformation steps to apply in sequence.
   * @returns Promise resolving to stream with headers and size information.
   */
  override transformStream(fileId: string, steps: TransformationStep[]): Promise<{
    headers?: Record<string, string>;
    size?: number;
    stream: Readable;
  }>;
  /**
   * Applies multiple transformations in sequence using Sharp.
   * @param buffer The original image buffer.
   * @param steps Array of transformation steps to apply.
   * @returns Promise resolving to transformed image buffer.
   * @private
   */
  private applyTransformations;
  /**
   * Applies resize transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Resize transformation options.
   * @returns Modified Sharp instance with resize applied.
   * @private
   */
  private applyResize;
  /**
   * Applies crop transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Crop transformation options.
   * @returns Modified Sharp instance with crop applied.
   * @private
   */
  private applyCrop;
  /**
   * Applies rotate transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Rotate transformation options.
   * @returns Modified Sharp instance with rotation applied.
   * @private
   */
  private applyRotate;
  /**
   * Applies sharpen transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Sharpen transformation options.
   * @returns Modified Sharp instance with sharpening applied.
   * @private
   */
  private applySharpen;
  /**
   * Applies blur transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Blur transformation options.
   * @returns Modified Sharp instance with blurring applied.
   * @private
   */
  private applyBlur;
  /**
   * Applies median filter using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Median transformation options.
   * @returns Modified Sharp instance with median filter applied.
   * @private
   */
  private applyMedian;
  /**
   * Applies CLAHE (Contrast Limited Adaptive Histogram Equalization) using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options CLAHE transformation options.
   * @returns Modified Sharp instance with CLAHE applied.
   * @private
   */
  private applyCLAHE;
  /**
   * Applies convolution using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Convolution transformation options.
   * @returns Modified Sharp instance with convolution applied.
   * @private
   */
  private applyConvolve;
  /**
   * Applies threshold using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Threshold transformation options.
   * @returns Modified Sharp instance with thresholding applied.
   * @private
   */
  private applyThreshold;
  /**
   * Applies boolean operation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Boolean operation options.
   * @returns Modified Sharp instance with boolean operation applied.
   * @private
   */
  private applyBoolean;
  /**
   * Applies linear transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Linear transformation options.
   * @returns Modified Sharp instance with linear transformation applied.
   * @private
   */
  private applyLinear;
  /**
   * Applies recombine transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Recombine transformation options.
   * @returns Modified Sharp instance with recombine applied.
   * @private
   */
  private applyRecombine;
  /**
   * Applies modulate transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Modulate transformation options.
   * @returns Modified Sharp instance with modulation applied.
   * @private
   */
  private applyModulate;
  /**
   * Applies tint using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Tint transformation options.
   * @returns Modified Sharp instance with tinting applied.
   * @private
   */
  private applyTint;
  /**
   * Applies greyscale conversion using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Greyscale transformation options.
   * @returns Modified Sharp instance converted to greyscale.
   * @private
   */
  private applyGreyscale;
  /**
   * Applies colourspace conversion using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Colourspace transformation options.
   * @returns Modified Sharp instance with colourspace conversion.
   * @private
   */
  private applyColourspace;
  /**
   * Extracts channel using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Channel extraction options including channel index.
   * @returns Modified Sharp instance with channel extracted.
   * @private
   */
  private applyExtractChannel;
  /**
   * Joins channels using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Channel joining options including image sources.
   * @returns Modified Sharp instance with channels joined.
   * @private
   */
  private applyJoinChannel;
  /**
   * Applies band boolean operation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Band boolean options including operator.
   * @returns Modified Sharp instance with band boolean operation applied.
   * @private
   */
  private applyBandbool;
  /**
   * Applies affine transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Affine transformation options including matrix.
   * @returns Modified Sharp instance with affine transformation applied.
   * @private
   */
  private applyAffine;
  /**
   * Applies dilation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Dilate options including kernel size.
   * @returns Modified Sharp instance with dilation applied.
   * @private
   */
  private applyDilate;
  /**
   * Applies erosion using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Erode options including kernel size.
   * @returns Modified Sharp instance with erosion applied.
   * @private
   */
  private applyErode;
  /**
   * Applies pipeline colourspace using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Pipeline colourspace options including target colourspace.
   * @returns Modified Sharp instance with pipeline colourspace applied.
   * @private
   */
  private applyPipelineColourspace;
  /**
   * Applies to colourspace conversion using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options To colourspace options including target colourspace.
   * @returns Modified Sharp instance with colourspace conversion applied.
   * @private
   */
  private applyToColourspace;
  /**
   * Applies remove alpha using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Remove alpha transformation options.
   * @returns Modified Sharp instance with alpha channel removed.
   * @private
   */
  private applyRemoveAlpha;
  /**
   * Applies ensure alpha using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Ensure alpha transformation options.
   * @returns Modified Sharp instance with alpha channel ensured.
   * @private
   */
  private applyEnsureAlpha;
  /**
   * Applies format and quality transformation using Sharp.
   * @param sharpInstance The Sharp instance to modify.
   * @param options Format and quality transformation options.
   * @returns Modified Sharp instance with format and quality settings applied.
   * @private
   */
  private applyFormatAndQuality;
  /**
   * Gets format-specific options for Sharp.
   * @param options Transform options containing format-specific settings.
   * @returns Record of format options for Sharp processing.
   * @private
   */
  private getFormatOptions;
  /**
   * Validates that the file is a supported image.
   * @param file The file to validate.
   * @returns Promise that resolves if validation passes.
   * @throws Error if file size exceeds limits, wrong content type, unsupported format, or invalid image.
   * @private
   */
  private validateImage;
  /**
   * Creates transformation result with metadata.
   * @param buffer The transformed image buffer.
   * @param originalFile The original file information.
   * @returns Image transformation result with metadata.
   * @private
   */
  private createTransformResult;
  /**
   * Generates cache key for transformation.
   * @param fileId The file identifier.
   * @param steps Array of transformation steps.
   * @returns Unique cache key string.
   * @private
   */
  private generateCacheKey;
}
export { ImageTransformer as default };