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_UTILS_H_ |
15 | #define WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ |
16 | |
17 | #include "src/webp/types.h" |
18 | |
19 | #ifdef __cplusplus |
20 | extern "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. 'stride' is in bytes. |
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, int stride, |
29 | int strength); |
30 | |
31 | #ifdef __cplusplus |
32 | } // extern "C" |
33 | #endif |
34 | |
35 | #endif // WEBP_UTILS_QUANT_LEVELS_DEC_UTILS_H_ |
36 | |