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// 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 "../webp/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_ */
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