Method fillRadialGradient

dep/agg/src/agg2d.cpp:537–564

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void Agg2D::fillRadialGradient(double x, double y, double r, Color c1, Color c2, double profile)
{
    int i;
    int startGradient = 128 - int(profile * 127.0);
    int endGradient   = 128 + int(profile * 127.0);
    if (endGradient <= startGradient) endGradient = startGradient + 1;
    double k = 1.0 / double(endGradient - startGradient);
    for (i = 0; i < startGradient; i++)
    {
        m_fillGradient[i] = c1;
    }
    for (; i < endGradient; i++)
    {
        m_fillGradient[i] = c1.gradient(c2, double(i - startGradient) * k);
    }
    for (; i < 256; i++)
    {
        m_fillGradient[i] = c2;
    }
    m_fillGradientD2 = worldToScreen(r);
    worldToScreen(x, y);
    m_fillGradientMatrix.reset();
    m_fillGradientMatrix *= agg::trans_affine_translation(x, y);
    m_fillGradientMatrix.invert();
    m_fillGradientD1 = 0;
    m_fillGradientFlag = Radial;
    m_fillColor = Color(0,0,0);  // Set some real color
}


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