export enum WebPImageHint {
  WEBP_HINT_DEFAULT, // default preset.
  WEBP_HINT_PICTURE, // digital picture, like portrait, inner shot
  WEBP_HINT_PHOTO,   // outdoor photograph, with natural lighting
  WEBP_HINT_GRAPH,   // Discrete tone image (graph, map-tile etc).
}

export interface EncodeOptions {
  quality: number;
  target_size: number;
  target_PSNR: number;
  method: number;
  sns_strength: number;
  filter_strength: number;
  filter_sharpness: number;
  filter_type: number;
  partitions: number;
  segments: number;
  pass: number;
  show_compressed: number;
  preprocessing: number;
  autofilter: number;
  partition_limit: number;
  alpha_compression: number;
  alpha_filtering: number;
  alpha_quality: number;
  lossless: number;
  exact: number;
  image_hint: number;
  emulate_jpeg_size: number;
  thread_level: number;
  low_memory: number;
  near_lossless: number;
  use_delta_palette: number;
  use_sharp_yuv: number;
}
export interface EncoderState { type: typeof type; options: EncodeOptions; }

export const type = 'webp';
export const label = 'WebP';
export const mimeType = 'image/webp';
export const extension = 'webp';
// These come from struct WebPConfig in encode.h.
export const defaultOptions: EncodeOptions = {
  quality: 75,
  target_size: 0,
  target_PSNR: 0,
  method: 4,
  sns_strength: 50,
  filter_strength: 60,
  filter_sharpness: 0,
  filter_type: 1,
  partitions: 0,
  segments: 4,
  pass: 1,
  show_compressed: 0,
  preprocessing: 0,
  autofilter: 0,
  partition_limit: 0,
  alpha_compression: 1,
  alpha_filtering: 1,
  alpha_quality: 100,
  lossless: 0,
  exact: 0,
  image_hint: 0,
  emulate_jpeg_size: 0,
  thread_level: 0,
  low_memory: 0,
  near_lossless: 100,
  use_delta_palette: 0,
  use_sharp_yuv: 0,
};