void wxSVGCanvas::GetRadialGradientTransform(wxSVGPoint& focus,
wxSVGMatrix& matrix, const wxSVGRadialGradientElement& gradElem,
wxSVGCanvasPath& path, bool scale)
{
double r, cx, cy, fx, fy;
r = gradElem.GetR().GetAnimVal();
cx = gradElem.GetCx().GetAnimVal();
cy = gradElem.GetCy().GetAnimVal();
fx = gradElem.GetFx().GetAnimVal();
fy = gradElem.GetFy().GetAnimVal();
if (gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_UNKNOWN ||
gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
{
wxSVGRect bbox = path.GetBBox();
r = r*sqrt(bbox.GetWidth()*bbox.GetWidth() + bbox.GetHeight()*bbox.GetHeight());
cx = bbox.GetX() + cx*bbox.GetWidth();
cy = bbox.GetY() + cy*bbox.GetHeight();
fx = bbox.GetX() + fx*bbox.GetWidth();
fy = bbox.GetY() + fy*bbox.GetHeight();
}
// Compute gradient transformation matrix
const wxSVGTransformList& transforms = gradElem.GetGradientTransform().GetAnimVal();
for (int i=0; i<(int)transforms.Count(); i++)
matrix = matrix.Multiply(transforms[i].GetMatrix());
// Apply Gradient parameters to transformation
matrix = matrix.Translate(cx, cy); //.Scale(r);
if (scale)
matrix = matrix.Scale(r);
// Change Focus reference to gradient reference
focus.SetX((fx - cx) / r);
focus.SetY((fy - cy) / r);
}
void wxSVGCanvas::GetLinearGradientVector(wxSVGPoint& p1, wxSVGPoint& p2, const wxSVGLinearGradientElement& gradElem,
wxSVGCanvasPath& path) {
p1.SetX(gradElem.GetX1().GetAnimVal());
p1.SetY(gradElem.GetY1().GetAnimVal());
p2.SetX(gradElem.GetX2().GetAnimVal());
p2.SetY(gradElem.GetY2().GetAnimVal());
if (gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_UNKNOWN ||
gradElem.GetGradientUnits().GetAnimVal() == wxSVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
{
wxSVGRect bbox = path.GetBBox();
p1.SetX(bbox.GetX() + p1.GetX()*bbox.GetWidth());
p1.SetY(bbox.GetY() + p1.GetY()*bbox.GetHeight());
p2.SetX(bbox.GetX() + p2.GetX()*bbox.GetWidth());
p2.SetY(bbox.GetY() + p2.GetY()*bbox.GetHeight());
}
// Compute gradient transformation matrix
wxSVGMatrix lg_matrix;
const wxSVGTransformList& transforms = gradElem.GetGradientTransform().GetAnimVal();
for (int i=0; i<(int)transforms.Count(); i++)
lg_matrix = lg_matrix.Multiply(transforms[i].GetMatrix());
p1 = p1.MatrixTransform(lg_matrix);
p2 = p2.MatrixTransform(lg_matrix);
}