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[chromium-blink-merge.git] / third_party / libwebp / utils / quant_levels_dec.h
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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
12 // Author: Vikas Arora (vikasa@google.com)
14 #ifndef WEBP_UTILS_QUANT_LEVELS_DEC_H_
15 #define WEBP_UTILS_QUANT_LEVELS_DEC_H_
17 #include "../webp/types.h"
19 #ifdef __cplusplus
20 extern "C" {
21 #endif
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, ...).
28 int WebPDequantizeLevels(uint8_t* const data, int width, int height,
29 int strength);
31 #ifdef __cplusplus
32 } // extern "C"
33 #endif
35 #endif /* WEBP_UTILS_QUANT_LEVELS_DEC_H_ */