1// Copyright 2013 Google Inc. All Rights Reserved. 2// 3// Use of this source code is governed by a BSD-style license 4// that can be found in the COPYING file in the root of the source 5// tree. An additional intellectual property rights grant can be found 6// in the file PATENTS. All contributing project authors may 7// be found in the AUTHORS file in the root of the source tree. 8// ----------------------------------------------------------------------------- 9// 10// Alpha plane de-quantization utility 11// 12// Author: Vikas Arora (vikasa@google.com) 13 14#ifndef WEBP_UTILS_QUANT_LEVELS_DEC_H_ 15#define WEBP_UTILS_QUANT_LEVELS_DEC_H_ 16 17#include "../webp/types.h" 18 19#ifdef __cplusplus 20extern "C" { 21#endif 22 23// Apply post-processing to input 'data' of size 'width'x'height' assuming that 24// the source was quantized to a reduced number of levels. 25// Strength is in [0..100] and controls the amount of dithering applied. 26// Returns false in case of error (data is NULL, invalid parameters, 27// malloc failure, ...). 28int WebPDequantizeLevels(uint8_t* const data, int width, int height, 29 int strength); 30 31#ifdef __cplusplus 32} // extern "C" 33#endif 34 35#endif /* WEBP_UTILS_QUANT_LEVELS_DEC_H_ */ 36