void SVGRadialGradientElement::buildGradient() const
{
RadialGradientAttributes attributes = collectGradientProperties();
RefPtr<SVGPaintServerRadialGradient> radialGradient = WTF::static_pointer_cast<SVGPaintServerRadialGradient>(m_resource);
double adjustedFocusX = attributes.fx();
double adjustedFocusY = attributes.fy();
double fdx = attributes.fx() - attributes.cx();
double fdy = attributes.fy() - attributes.cy();
// Spec: If (fx, fy) lies outside the circle defined by (cx, cy) and
// r, set (fx, fy) to the point of intersection of the line through
// (fx, fy) and the circle.
if (sqrt(fdx * fdx + fdy * fdy) > attributes.r()) {
double angle = atan2(attributes.fy() * 100.0, attributes.fx() * 100.0);
adjustedFocusX = cos(angle) * attributes.r();
adjustedFocusY = sin(angle) * attributes.r();
}
FloatPoint focalPoint = FloatPoint::narrowPrecision(attributes.fx(), attributes.fy());
FloatPoint centerPoint = FloatPoint::narrowPrecision(attributes.cx(), attributes.cy());
RefPtr<Gradient> gradient = Gradient::create(
FloatPoint::narrowPrecision(adjustedFocusX, adjustedFocusY),
0.f, // SVG does not support a "focus radius"
centerPoint,
narrowPrecisionToFloat(attributes.r()));
gradient->setSpreadMethod(attributes.spreadMethod());
Vector<SVGGradientStop> stops = attributes.stops();
float previousOffset = 0.0f;
for (unsigned i = 0; i < stops.size(); ++i) {
float offset = std::min(std::max(previousOffset, stops[i].first), 1.0f);
previousOffset = offset;
gradient->addColorStop(offset, stops[i].second);
}
radialGradient->setGradient(gradient);
if (attributes.stops().isEmpty())
return;
radialGradient->setBoundingBoxMode(attributes.boundingBoxMode());
radialGradient->setGradientTransform(attributes.gradientTransform());
radialGradient->setGradientCenter(centerPoint);
radialGradient->setGradientFocal(focalPoint);
radialGradient->setGradientRadius(narrowPrecisionToFloat(attributes.r()));
radialGradient->setGradientStops(attributes.stops());
}
void SVGRadialGradientElement::buildGradient() const
{
RadialGradientAttributes attributes = collectGradientProperties();
// If we didn't find any gradient containing stop elements, ignore the request.
if (attributes.stops().isEmpty())
return;
RefPtr<SVGPaintServerRadialGradient> radialGradient = WTF::static_pointer_cast<SVGPaintServerRadialGradient>(m_resource);
radialGradient->setGradientStops(attributes.stops());
radialGradient->setBoundingBoxMode(attributes.boundingBoxMode());
radialGradient->setGradientSpreadMethod(attributes.spreadMethod());
radialGradient->setGradientTransform(attributes.gradientTransform());
radialGradient->setGradientCenter(FloatPoint::narrowPrecision(attributes.cx(), attributes.cy()));
radialGradient->setGradientFocal(FloatPoint::narrowPrecision(attributes.fx(), attributes.fy()));
radialGradient->setGradientRadius(narrowPrecisionToFloat(attributes.r()));
}
FloatPoint RenderSVGResourceRadialGradient::focalPoint(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolvePoint(static_cast<const SVGElement*>(node()), attributes.gradientUnits(), attributes.fx(), attributes.fy());
}
FloatPoint LayoutSVGResourceRadialGradient::focalPoint(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(), *attributes.fx(), *attributes.fy());
}