public void SetFilterOffset(double dx, double dy)
{
m_dx_dbl = dx;
m_dy_dbl = dy;
m_dx_int = AggMath.iround(dx * img_subpix_const.SCALE);
m_dy_int = AggMath.iround(dy * img_subpix_const.SCALE);
}
//--------------------------------------------------------------------
public SpanGenGradient(ISpanInterpolator inter,
IGradientValueCalculator gvc,
IGradientColorsProvider m_colorsProvider,
double d1, double d2)
{
this.m_interpolator = inter;
this.m_grValueCalculator = gvc;
this.m_colorsProvider = m_colorsProvider;
m_d1 = AggMath.iround(d1 * GR_SUBPIX_SCALE);
m_d2 = AggMath.iround(d2 * GR_SUBPIX_SCALE);
dd = m_d2 - m_d1;
if (dd < 1)
{
dd = 1;
}
stepRatio = (float)m_colorsProvider.GradientSteps / (float)dd;
}
public void Calculate(double y)
{
double k = (y - m_y1) * m_1dy;
if (k < 0.0)
{
k = 0.0;
}
if (k > 1.0)
{
k = 1.0;
}
m_r = m_r1 + AggMath.iround(m_dr * k);
m_g = m_g1 + AggMath.iround(m_dg * k);
m_b = m_b1 + AggMath.iround(m_db * k);
m_a = m_a1 + AggMath.iround(m_da * k);
m_x = AggMath.iround((m_x1 + m_dx * k) * (double)SUBPIXEL_SCALE);
}
//---------------------------------
//from vector clipper
static int upscale(double v)
{
return(AggMath.iround(v * poly_subpix.SCALE));
}
