declare class _BasisFile { constructor ( x ) ; close ( ) ; getHasAlpha ( ) ; getNumImages ( ) ; getNumLevels ( imageIndex ) ; getImageWidth ( imageIndex , levelIndex ) ; getImageHeight ( imageIndex , levelIndex ) ; getImageTranscodedSizeInBytes ( imageIndex , levelImdex , format ) ; startTranscoding ( ) ; transcodeImage ( dst , imageIndex , levelIndex , format , unused , getAlphaForOpaqueFormats ) ; delete ( ) ; } export type BasisFile = _BasisFile ; export type BasisTranscoder = { BasisFile : new ( x ) => BasisFile ; initializeBasis : ( ) => void ; } ; declare function _BASIS ( ) ; export type BASIS = typeof _BASIS ;