text: // Copyright 2013 Google Inc. All Rights Reserved.
  //
  // Use of this source code is governed by a BSD-style license
  // that can be found in the COPYING file in the root of the source
  // tree. An additional intellectual property rights grant can be found
  // in the file PATENTS. All contributing project authors may
  // be found in the AUTHORS file in the root of the source tree.
  // -----------------------------------------------------------------------------
  //
  // Alpha plane de-quantization utility
  //
  // Author:  Vikas Arora (vikasa@google.com)
  
  #ifndef WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_
  #define WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_
  
  #include "types.h"
  
  #ifdef __cplusplus
  extern "C" {
  #endif
  
  // Apply post-processing to input 'data' of size 'width'x'height' assuming that
  // the source was quantized to a reduced number of levels. 'stride' is in bytes.
  // Strength is in [0..100] and controls the amount of dithering applied.
  // Returns false in case of error (data is NULL, invalid parameters,
  // malloc failure, ...).
  int WebPDequantizeLevels(uint8_t* const data, int width, int height, int stride,
                           int strength);
  
  #ifdef __cplusplus
  }    // extern "C"
  #endif
  
  #endif  // WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_
  