mirror of
https://github.com/RobTillaart/Arduino.git
synced 2024-10-03 18:09:02 -04:00
62 lines
1.1 KiB
C++
62 lines
1.1 KiB
C++
#pragma once
|
|
//
|
|
// FILE: gamma.h
|
|
// AUTHOR: Rob Tillaart
|
|
// VERSION: 0.3.1
|
|
// DATE: 2020-08-08
|
|
// PURPOSE: Arduino Library to efficiently hold a gamma lookup table
|
|
|
|
|
|
#include "Arduino.h"
|
|
|
|
#define GAMMA_LIB_VERSION (F("0.3.1"))
|
|
|
|
#define GAMMA_DEFAULT_SIZE 32
|
|
#define GAMMA_MAX_SIZE 256
|
|
|
|
|
|
class GAMMA
|
|
{
|
|
|
|
public:
|
|
|
|
GAMMA(uint16_t size = GAMMA_DEFAULT_SIZE);
|
|
~GAMMA();
|
|
|
|
// allocates memory
|
|
// sets default gamma = 2.8
|
|
// Returns false if allocation fails
|
|
bool begin();
|
|
|
|
// CORE
|
|
// Returns false if gamma <= 0
|
|
bool setGamma(float gamma);
|
|
float getGamma();
|
|
// access values with index operator
|
|
// index = 0 .. size
|
|
uint8_t operator[] (uint8_t index);
|
|
|
|
// META INFO
|
|
uint16_t size();
|
|
uint16_t distinct();
|
|
|
|
// DEBUG
|
|
bool dump(Stream *str = &Serial);
|
|
bool dumpArray(Stream *str = &Serial);
|
|
|
|
|
|
private:
|
|
uint8_t _shift = 0;
|
|
uint8_t _mask = 0;
|
|
uint16_t _size = 0;
|
|
uint8_t _interval = 0;
|
|
float _gamma = 1.0; // 1.0 == no gamma, linear.
|
|
uint8_t * _table = NULL;
|
|
|
|
float fastPow(float a, float b);
|
|
};
|
|
|
|
|
|
// -- END OF FILE --
|
|
|