unsigned int wxSVGCanvas::GetGradientStops(const wxSVGSVGElement& svgElem, wxSVGGradientElement* gradElem, float opacity) {
if (gradElem == NULL)
return 0;
// Search for the most referenced gradient (we assume that this is the one that contain stops)
while (true) {
wxString grad_href = gradElem->GetHref();
if (grad_href.length() <= 1 || grad_href.GetChar(0) != wxT('#'))
break;
wxSVGElement* tmp = (wxSVGSVGElement*) svgElem.GetElementById(grad_href.substr(1));
if (tmp == NULL || (tmp->GetDtd() != wxSVG_LINEARGRADIENT_ELEMENT
&& tmp->GetDtd() != wxSVG_RADIALGRADIENT_ELEMENT))
break;
gradElem = (wxSVGGradientElement*) tmp;
}
// Count number of stop element
wxSVGStopElement* stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
unsigned int stop_count = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
stop_count++;
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
if (stop_count == 0)
return 0;
// Allocate enough stops
AllocateGradientStops(stop_count);
// Fill the stops
stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
int i = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
SetStopValue(i++, stop_elem->GetOffset(), stop_elem->GetStopOpacity() * opacity,
stop_elem->GetStopColor().GetRGBColor());
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
return stop_count;
}
unsigned int wxSVGCanvas::GetGradientStops(const wxSVGSVGElement& svgElem, wxSVGGradientElement* gradElem, float opacity) {
if (gradElem == NULL)
return 0;
// Search for the most referenced gradient (we assume that this is the one that contain stops)
while (true) {
wxString grad_href = gradElem->GetHref();
if (grad_href.length() <= 1 || grad_href.GetChar(0) != wxT('#'))
break;
wxSVGElement* tmp = (wxSVGSVGElement*) svgElem.GetElementById(grad_href.substr(1));
if (tmp == NULL || (tmp->GetDtd() != wxSVG_LINEARGRADIENT_ELEMENT
&& tmp->GetDtd() != wxSVG_RADIALGRADIENT_ELEMENT))
break;
gradElem = (wxSVGGradientElement*) tmp;
}
// Count number of stop element
wxSVGStopElement* stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
unsigned int stop_count = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT)
stop_count++;
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
if (stop_count == 0)
return 0;
// Allocate enough stops
AllocateGradientStops(stop_count);
// Fill the stops
stop_elem = (wxSVGStopElement*) gradElem->GetChildren();
int i = 0;
while (stop_elem) {
if (stop_elem->GetDtd() == wxSVG_STOP_ELEMENT) {
wxSVGColor color = stop_elem->GetStopColor();
// no color, default is black
if (color.GetColorType() == wxSVG_COLORTYPE_UNKNOWN)
color = wxSVGColor(0,0,0);
SetStopValue(i++, stop_elem->GetOffset(), stop_elem->GetStopOpacity() * opacity,
color.GetRGBColor());
stop_elem = (wxSVGStopElement*) stop_elem->GetNext();
}
return stop_count;
}
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);
}
