hyperion.ng/libsrc/utils/RgbTransform.cpp
redPanther e1165e112f fix/refactor backlight stuff (#394)
* fix/refactor backlight stuff:
- fix colors dont turn of when backlight 0 and black is set
- add option to use not colored backlight
- fix colored backlight not colored on very low color values
- various code style tunings

* apply needed change to wizard

* backlight disabled on static color and efects

* fix warnings

* try fix udp compiler warnings
2017-02-11 22:52:47 +01:00

150 lines
3.3 KiB
C++

#include <iostream>
#include <cmath>
#include <utils/RgbTransform.h>
RgbTransform::RgbTransform()
{
init(1.0, 1.0, 1.0, 0.0, false, 1.0);
}
RgbTransform::RgbTransform(double gammaR, double gammaG, double gammaB, double backlightThreshold, bool backlightColored, double brightnessHigh)
{
init(gammaR, gammaG, gammaB, backlightThreshold, backlightColored, brightnessHigh);
}
void RgbTransform::init(double gammaR, double gammaG, double gammaB, double backlightThreshold, bool backlightColored, double brightnessHigh)
{
_backLightEnabled = true;
setGamma(gammaR,gammaG,gammaB);
setBacklightThreshold(backlightThreshold);
setBacklightColored(backlightColored);
setBrightness(brightnessHigh);
initializeMapping();
}
RgbTransform::~RgbTransform()
{
}
double RgbTransform::getGammaR() const
{
return _gammaR;
}
double RgbTransform::getGammaG() const
{
return _gammaG;
}
double RgbTransform::getGammaB() const
{
return _gammaB;
}
void RgbTransform::setGamma(double gammaR, double gammaG, double gammaB)
{
_gammaR = gammaR;
_gammaG = (gammaG < 0.0) ? _gammaR : gammaG;
_gammaB = (gammaB < 0.0) ? _gammaR : gammaB;
initializeMapping();
}
void RgbTransform::initializeMapping()
{
for (int i = 0; i < 256; ++i)
{
_mappingR[i] = std::min(std::max((int)(std::pow(i / 255.0, _gammaR) * 255), 0), 255);
_mappingG[i] = std::min(std::max((int)(std::pow(i / 255.0, _gammaG) * 255), 0), 255);
_mappingB[i] = std::min(std::max((int)(std::pow(i / 255.0, _gammaB) * 255), 0), 255);
}
}
double RgbTransform::getBacklightThreshold() const
{
return _backlightThreshold;
}
void RgbTransform::setBacklightThreshold(double backlightThreshold)
{
_backlightThreshold = backlightThreshold;
_sumBrightnessLow = 765.0 * ((std::pow(2.0,backlightThreshold*2)-1) / 3.0);
}
bool RgbTransform::getBacklightColored() const
{
return _backlightColored;
}
void RgbTransform::setBacklightColored(bool backlightColored)
{
_backlightColored = backlightColored;
}
bool RgbTransform::getBackLightEnabled() const
{
return _backLightEnabled;
}
void RgbTransform::setBackLightEnabled(bool enable)
{
_backLightEnabled = enable;
}
double RgbTransform::getBrightness() const
{
return _brightnessHigh;
}
void RgbTransform::setBrightness(double brightness)
{
_brightnessHigh = brightness;
_sumBrightnessHigh = 765.0 * ((std::pow(2.0,brightness*2)-1) / 3.0);
}
void RgbTransform::transform(uint8_t & red, uint8_t & green, uint8_t & blue)
{
// apply gamma
red = _mappingR[red];
green = _mappingR[green];
blue = _mappingR[blue];
//std::cout << (int)red << " " << (int)green << " " << (int)blue << " => ";
// apply brightnesss
int rgbSum = red+green+blue;
if (_sumBrightnessHigh > 0 && rgbSum > _sumBrightnessHigh)
{
double cH = _sumBrightnessHigh / rgbSum;
red *= cH;
green *= cH;
blue *= cH;
}
else if ( _backLightEnabled && _sumBrightnessLow>0 && rgbSum < _sumBrightnessLow)
{
if (_backlightColored)
{
if (rgbSum == 0)
{
if (red ==0) red = 1;
if (green==0) green = 1;
if (blue ==0) blue = 1;
rgbSum = red+green+blue;
}
double cL =std::min((int)(_sumBrightnessLow /rgbSum), 255);
red *= cL;
green *= cL;
blue *= cL;
}
else
{
red = std::min((int)(_sumBrightnessLow/3.0), 255);
green = red;
blue = red;
}
}
//std::cout << _sumBrightnessLow << " " << (int)red << " " << (int)green << " " << (int)blue << std::endl;
}