hyperion.ng/libsrc/utils/RgbToRgbw.cpp

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#include <utils/ColorRgb.h>
#include <utils/ColorRgbw.h>
#include <utils/RgbToRgbw.h>
#include <utils/Logger.h>
namespace RGBW {
WhiteAlgorithm stringToWhiteAlgorithm(QString str)
{
if (str == "subtract_minimum") return SUBTRACT_MINIMUM;
if (str == "sub_min_warm_adjust") return SUB_MIN_WARM_ADJUST;
if (str == "sub_min_cool_adjust") return SUB_MIN_COOL_ADJUST;
if (str.isEmpty() || str == "white_off") return WHITE_OFF;
return INVALID;
}
void Rgb_to_Rgbw(ColorRgb input, ColorRgbw * output, const WhiteAlgorithm algorithm)
{
switch (algorithm)
{
case SUBTRACT_MINIMUM:
{
output->white = qMin(qMin(input.red, input.green), input.blue);
output->red = input.red - output->white;
output->green = input.green - output->white;
output->blue = input.blue - output->white;
break;
}
case SUB_MIN_WARM_ADJUST:
{
// http://forum.garagecube.com/viewtopic.php?t=10178
// warm white
float F1 = 0.274;
float F2 = 0.454;
float F3 = 2.333;
output->white = qMin(input.red*F1,qMin(input.green*F2,input.blue*F3));
output->red = input.red - output->white/F1;
output->green = input.green - output->white/F2;
output->blue = input.blue - output->white/F3;
break;
}
case SUB_MIN_COOL_ADJUST:
{
// http://forum.garagecube.com/viewtopic.php?t=10178
// cold white
float F1 = 0.299;
float F2 = 0.587;
float F3 = 0.114;
output->white = qMin(input.red*F1,qMin(input.green*F2,input.blue*F3));
output->red = input.red - output->white/F1;
output->green = input.green - output->white/F2;
output->blue = input.blue - output->white/F3;
break;
}
case WHITE_OFF:
{
output->red = input.red;
output->green = input.green;
output->blue = input.blue;
output->white = 0;
break;
}
default:
break;
}
}
};