Method ComputeHSV

ColorCop/ColorCopDlg.cpp:771–800

}

void CColorCopDlg::ComputeHSV(int red, int green, int blue,
                              double& outH, double& outS, double& outV) {
    double rf = red / RGB_MAX_D;
    double gf = green / RGB_MAX_D;
    double bf = blue / RGB_MAX_D;

    double maxv = std::max({rf, gf, bf});
    double minv = std::min({rf, gf, bf});
    double delta = maxv - minv;

    // Value (0–100)
    outV = maxv * 100.0;

    // Saturation (0–100)
    outS = (maxv == 0.0) ? 0.0 : (delta / maxv) * 100.0;

    // Hue (0–360)
    if (delta <= HSL_EPSILON) {
        outH = 0.0;
    } else if (maxv == rf) {
        outH = 60.0 * fmod(((gf - bf) / delta), 6.0);
    } else if (maxv == gf) {
        outH = 60.0 * (((bf - rf) / delta) + HUE_SECTOR_GREEN);
    } else {
        outH = 60.0 * (((rf - gf) / delta) + HUE_SECTOR_BLUE);
    }

    if (outH < 0.0)
        outH += 360.0;
}

void CColorCopDlg::RecalcZoom() {
    ASSERT(m_MagLevel >= kMinZoom && m_MagLevel <= kMaxZoom);