35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
// Copyright 2022 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.
|
|
// -----------------------------------------------------------------------------
|
|
//
|
|
// Gamma correction utilities.
|
|
|
|
#ifndef WEBP_SHARPYUV_SHARPYUV_GAMMA_H_
|
|
#define WEBP_SHARPYUV_SHARPYUV_GAMMA_H_
|
|
|
|
#include <stdint.h>
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
// Initializes precomputed tables. Must be called once before calling
|
|
// SharpYuvGammaToLinear or SharpYuvLinearToGamma.
|
|
void SharpYuvInitGammaTables(void);
|
|
|
|
// Converts a gamma color value on 'bit_depth' bits to a 16 bit linear value.
|
|
uint32_t SharpYuvGammaToLinear(uint16_t v, int bit_depth);
|
|
|
|
// Converts a 16 bit linear color value to a gamma value on 'bit_depth' bits.
|
|
uint16_t SharpYuvLinearToGamma(uint32_t value, int bit_depth);
|
|
|
|
#ifdef __cplusplus
|
|
} // extern "C"
|
|
#endif
|
|
|
|
#endif // WEBP_SHARPYUV_SHARPYUV_GAMMA_H_
|