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100 lines
2.7 KiB
C++
100 lines
2.7 KiB
C++
#pragma once
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//
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// FILE: Kelvin2RGB.h
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// AUTHOR: Rob Tillaart
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// VERSION: 0.1.4
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// DATE: 2018-01-31
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// PURPOSE: Arduino library for converting temperature to RGB values
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// URL: https://github.com/RobTillaart/Kelvin2RGB
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//
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#define KELVIN2RGB_LIB_VERSION (F("0.1.4"))
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#include "Arduino.h"
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//
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// Based upon article Tanner Helland and Neil Bartlett
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// http://www.tannerhelland.com/4435/convert-temperature-rgb-algorithm-code/
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// http://www.zombieprototypes.com/?p=210
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// https://en.wikipedia.org/wiki/Color_temperature#Categorizing_different_lighting
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//
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//
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// based on https://en.wikipedia.org/wiki/Color_temperature#Categorizing_different_lighting
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//
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// DAY LIGHT SETTING TEMPERATURE
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//
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#define DLS_dark 0
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#define DLS_match 1700
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#define DLS_sodiumLamp 1700
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#define DLS_candleFlame 1850
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#define DLS_sunrise 1850
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#define DLS_sunset 1850
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#define DLS_bulb 2400
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#define DLS_bulbSoftWhite 2550
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#define DLS_LEDlamp 2700
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#define DLS_warmWhite 3000
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#define DLS_studioLight 3200
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#define DLS_studioCPlight 3350
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#define DLS_daylightHorizon 5000
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#define DLS_flashLight 5700
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#define DLS_xenonLight 6200
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#define DLS_dayLightBright 6500
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#define DLS_normal 6500
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#define DLS_screenlow 6500
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#define DLS_screenMed 8000
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#define DLS_screenHigh 9500
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#define DLS_polewardSky0 15000
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#define DLS_polewardSky1 19000
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#define DLS_polewardSky2 23000
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#define DLS_polewardSky3 27000
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class Kelvin2RGB
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{
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public:
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Kelvin2RGB();
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void begin(); // empty function - obsolete?
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void reset();
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// temp = 0..65500 brightness = 0.0 .. 100.0%
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void convert_TH(float temperature, float brightness = 100);
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void convert_NB(float temperature, float brightness = 100);
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float temperature() { return _temperature; };
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float brightness() { return _brightness; };
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// returns 0.0 .. 1.0
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float red() { return _red; };
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float green() { return _green; };
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float blue() { return _blue; };
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// red, green, blue should be in 0 .. 1.0 range
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// brightness should be in 0..100%, Default = 100%,
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// returns RGB.
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uint32_t setRGB(float red, float green, float blue, float brightness = 100);
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uint32_t RGB() { return _rgb; }; // 32 bit colour
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uint16_t RGB565(); // 16 bit colour
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// experimental 0.1.3
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uint32_t CMYK();
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uint32_t BGR();
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private:
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void _normalize();
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float _temperature = 0;
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float _brightness = 0;
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float _red = 0;
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float _green = 0;
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float _blue = 0;
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uint32_t _rgb = 0;
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};
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// -- END OF FILE --
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