////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 13JUN2009 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* Create the gradient brush.
* @param ff_xmin the top left coordinate.
* @param ff_ymin the top left coordinate.
* @param ff_xmax the bottom right coordinate.
* @param ff_ymax the bottom right coordinate.
* @param ff_angle the angle for this gradient.
* @param type the type of the gradient brush.
*/
public LinearGradientBrushFP(int ffXmin, int ffYmin, int ffXmax, int ffYmax,
int ffAngle)
{
_bounds.Reset(ffXmin, ffYmin,
ffXmax == ffXmin ? ffXmin + 1 : ffXmax,
ffYmax == ffYmin ? ffYmin + 1 : ffYmax);
_matrix = new MatrixFP();
_centerPt.Reset(ffXmin + (ffXmax - ffXmin) / 2,
ffYmin + (ffYmax - ffYmin) / 2);
_matrix.Translate(-_centerPt.X, -_centerPt.Y);
_matrix.Rotate(-ffAngle);
//matrix.translate((ff_xmin + ff_xmax) / 2,(ff_ymin + ff_ymax) / 2);
var ffAng = MathFP.Atan(MathFP.Div(_bounds.GetHeight(),
_bounds.GetWidth() == 0 ? 1 : _bounds.GetWidth()));
var ffLen = PointFP.Distance(_bounds.GetHeight(), _bounds.GetWidth());
_ffLength = MathFP.Mul(ffLen, MathFP.Max(
MathFP.Abs(MathFP.Cos(ffAngle - ffAng)),
MathFP.Abs(MathFP.Cos(ffAngle + ffAng))));
}
////////////////////////////////////////////////////////////////////////////
//--------------------------------- REVISIONS ------------------------------
// Date Name Tracking # Description
// --------- ------------------- ------------- ----------------------
// 09NOV2008 James Shen Initial Creation
////////////////////////////////////////////////////////////////////////////
/**
* @inheritDoc
* @param x the x coordinate
* @param y the y coordinate
* @param singlePoint
* @return the color at given position.
*/
public override int GetColorAt(int x, int y, bool singlePoint)
{
var p = new PointFP(x << SingleFP.DECIMAL_BITS,
y << SingleFP.DECIMAL_BITS);
_nextPt.X = p.X + SingleFP.ONE;
_nextPt.Y = p.Y;
var newCenterPt = new PointFP(_centerPt);
if (_finalMatrix != null)
{
p.Transform(_finalMatrix);
//newCenterPt.transform(finalMatrix);
}
_ffCurrpos = MathFP.Div(PointFP.Distance(p.X - newCenterPt.X,
p.Y - newCenterPt.Y), _ffRadius);
var pos = _ffCurrpos >> SingleFP.DECIMAL_BITS - RATIO_BITS;
switch (FillMode)
{
case REFLECT:
pos = pos % (RATIO_MAX * 2);
pos = pos < 0 ? pos + RATIO_MAX * 2 : pos;
pos = (pos < RATIO_MAX) ? pos : RATIO_MAX * 2 - pos;
break;
case REPEAT:
pos = pos % RATIO_MAX;
pos = pos < 0 ? pos + RATIO_MAX : pos;
break;
case NO_CYCLE:
pos = pos < 0 ? 0 : (pos > RATIO_MAX ? RATIO_MAX : pos);
break;
}
return(_gradientColors[pos]);
}
