public GradientBrushFP(int ff_xmin, int ff_ymin, int ff_xmax, int ff_ymax, int ff_angle, int type)
{
bounds.Reset(ff_xmin, ff_ymin,
ff_xmax == ff_xmin ? ff_xmin + 1 : ff_xmax,
ff_ymax == ff_ymin ? ff_ymin + 1 : ff_ymax);
matrix = new MatrixFP();
matrix.Translate(-(ff_xmin + ff_xmax) / 2, -(ff_ymin + ff_ymax) / 2);
matrix.Rotate(-ff_angle);
this.type = type;
if (type == RADIAL_GRADIENT)
{
matrix.Scale(MathFP.Div(SingleFP.One, bounds.Width), MathFP.Div(SingleFP.One, bounds.Height));
}
int ff_ang = MathFP.Atan(MathFP.Div(bounds.Height, bounds.Width == 0 ? 1 : bounds.Width));
int ff_len = PointFP.Distance(bounds.Height, bounds.Width);
ff_length = MathFP.Mul(ff_len, MathFP.Max(
MathFP.Abs(MathFP.Cos(ff_angle - ff_ang)),
MathFP.Abs(MathFP.Cos(ff_angle + ff_ang))));
}