src/F2/Platform.cpp

#include <FCam/processing/Color.h>
#include <FCam/F2/Platform.h>


namespace FCam {
namespace F2 {

// \todo Do full calibration for F2.
// Copied from N900 for now
void Platform::rawToRGBColorMatrix(int kelvin, float *matrix) const {

    // These are quick and dirty numbers computed using a random
    // outdoor overcast day, and interior office lighting.  The 3x3
    // linear portion of the matrices are scaled so that the minimum
    // row sum is one (i.e. saturated in all channels maps to white).
    static float RawToRGBColorMatrix3200K[] = {
        1.6697,   -0.2693,   -0.4004,  -42.4346,
        -0.3576,    1.0615,    1.5949,  -37.1158,
        -0.2175,  -1.8751,    6.9640,  -26.6970
    };

    static float RawToRGBColorMatrix7000K[] = {
        2.2997,   -0.4478,    0.1706,  -39.0923,
        -0.3826,    1.5906,   -0.2080,  -25.4311,
        -0.0888,   -0.7344,    2.2832,  -20.0826
    };

    // Linear interpolation with inverse color temperature
    float alpha = (1./kelvin-1./3200)/(1./7000-1./3200);
    colorMatrixInterpolate(RawToRGBColorMatrix3200K,
                           RawToRGBColorMatrix7000K,
                           alpha, matrix);
}

const Platform &Platform::instance() {
    static Platform plat;
    return plat;
}

}
}