void RenderSVGResourceRadialGradient::buildGradient(GradientData* gradientData, SVGGradientElement* gradientElement) const
{
SVGRadialGradientElement* radialGradientElement = static_cast<SVGRadialGradientElement*>(gradientElement);
RadialGradientAttributes attributes = radialGradientElement->collectGradientProperties();
// Determine gradient focal/center points and radius
FloatPoint focalPoint;
FloatPoint centerPoint;
float radius;
radialGradientElement->calculateFocalCenterPointsAndRadius(attributes, focalPoint, centerPoint, radius);
gradientData->gradient = Gradient::create(focalPoint,
0.0f, // SVG does not support a "focus radius"
centerPoint,
radius);
gradientData->gradient->setSpreadMethod(attributes.spreadMethod());
// Record current gradient transform
gradientData->transform = attributes.gradientTransform();
gradientData->boundingBoxMode = attributes.boundingBoxMode();
// Add stops
addStops(gradientData, attributes.stops());
}
bool SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttributes& attributes)
{
if (!renderer())
return false;
WillBeHeapHashSet<RawPtrWillBeMember<SVGGradientElement> > processedGradients;
SVGGradientElement* current = this;
setGradientAttributes(current, attributes);
processedGradients.add(current);
while (true) {
// Respect xlink:href, take attributes from referenced element
Node* refNode = SVGURIReference::targetElementFromIRIString(current->href()->currentValue()->value(), treeScope());
if (refNode && isSVGGradientElement(*refNode)) {
current = toSVGGradientElement(refNode);
// Cycle detection
if (processedGradients.contains(current))
break;
if (!current->renderer())
return false;
setGradientAttributes(current, attributes, isSVGRadialGradientElement(*current));
processedGradients.add(current);
} else {
break;
}
}
// Handle default values for fx/fy
if (!attributes.hasFx())
attributes.setFx(attributes.cx());
if (!attributes.hasFy())
attributes.setFy(attributes.cy());
return true;
}
bool SVGRadialGradientElement::collectGradientAttributes(RadialGradientAttributes& attributes)
{
if (!renderer())
return false;
HashSet<SVGGradientElement*> processedGradients;
SVGGradientElement* current = this;
setGradientAttributes(*current, attributes);
processedGradients.add(current);
while (true) {
// Respect xlink:href, take attributes from referenced element
Node* refNode = SVGURIReference::targetElementFromIRIString(current->href(), document());
if (is<SVGGradientElement>(refNode)) {
current = downcast<SVGGradientElement>(refNode);
// Cycle detection
if (processedGradients.contains(current))
break;
if (!current->renderer())
return false;
setGradientAttributes(*current, attributes, current->hasTagName(SVGNames::radialGradientTag));
processedGradients.add(current);
} else
break;
}
// Handle default values for fx/fy
if (!attributes.hasFx())
attributes.setFx(attributes.cx());
if (!attributes.hasFy())
attributes.setFy(attributes.cy());
return true;
}
static void setGradientAttributes(SVGGradientElement* element, RadialGradientAttributes& attributes, bool isRadial = true)
{
if (!attributes.hasSpreadMethod() && element->spreadMethod()->isSpecified())
attributes.setSpreadMethod(element->spreadMethod()->currentValue()->enumValue());
if (!attributes.hasGradientUnits() && element->gradientUnits()->isSpecified())
attributes.setGradientUnits(element->gradientUnits()->currentValue()->enumValue());
if (!attributes.hasGradientTransform() && element->gradientTransform()->isSpecified()) {
AffineTransform transform;
element->gradientTransform()->currentValue()->concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(element->buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isRadial) {
SVGRadialGradientElement* radial = toSVGRadialGradientElement(element);
if (!attributes.hasCx() && radial->cx()->isSpecified())
attributes.setCx(radial->cx()->currentValue());
if (!attributes.hasCy() && radial->cy()->isSpecified())
attributes.setCy(radial->cy()->currentValue());
if (!attributes.hasR() && radial->r()->isSpecified())
attributes.setR(radial->r()->currentValue());
if (!attributes.hasFx() && radial->fx()->isSpecified())
attributes.setFx(radial->fx()->currentValue());
if (!attributes.hasFy() && radial->fy()->isSpecified())
attributes.setFy(radial->fy()->currentValue());
if (!attributes.hasFr() && radial->fr()->isSpecified())
attributes.setFr(radial->fr()->currentValue());
}
}
void writeSVGResourceContainer(TextStream& ts, const RenderObject& object, int indent)
{
writeStandardPrefix(ts, object, indent);
Element* element = toElement(object.node());
const AtomicString& id = element->getIdAttribute();
writeNameAndQuotedValue(ts, "id", id);
RenderSVGResourceContainer* resource = const_cast<RenderObject&>(object).toRenderSVGResourceContainer();
ASSERT(resource);
if (resource->resourceType() == MaskerResourceType) {
RenderSVGResourceMasker* masker = toRenderSVGResourceMasker(resource);
writeNameValuePair(ts, "maskUnits", masker->maskUnits());
writeNameValuePair(ts, "maskContentUnits", masker->maskContentUnits());
ts << "\n";
} else if (resource->resourceType() == FilterResourceType) {
RenderSVGResourceFilter* filter = toRenderSVGResourceFilter(resource);
writeNameValuePair(ts, "filterUnits", filter->filterUnits());
writeNameValuePair(ts, "primitiveUnits", filter->primitiveUnits());
ts << "\n";
// Creating a placeholder filter which is passed to the builder.
FloatRect dummyRect;
RefPtr<SVGFilter> dummyFilter = SVGFilter::create(AffineTransform(), dummyRect, dummyRect, dummyRect, true);
if (RefPtr<SVGFilterBuilder> builder = filter->buildPrimitives(dummyFilter.get())) {
if (FilterEffect* lastEffect = builder->lastEffect())
lastEffect->externalRepresentation(ts, indent + 1);
}
} else if (resource->resourceType() == ClipperResourceType) {
writeNameValuePair(ts, "clipPathUnits", toRenderSVGResourceClipper(resource)->clipPathUnits());
ts << "\n";
} else if (resource->resourceType() == MarkerResourceType) {
RenderSVGResourceMarker* marker = toRenderSVGResourceMarker(resource);
writeNameValuePair(ts, "markerUnits", marker->markerUnits());
ts << " [ref at " << marker->referencePoint() << "]";
ts << " [angle=";
if (marker->angle() == -1)
ts << "auto" << "]\n";
else
ts << marker->angle() << "]\n";
} else if (resource->resourceType() == PatternResourceType) {
RenderSVGResourcePattern* pattern = static_cast<RenderSVGResourcePattern*>(resource);
// Dump final results that are used for rendering. No use in asking SVGPatternElement for its patternUnits(), as it may
// link to other patterns using xlink:href, we need to build the full inheritance chain, aka. collectPatternProperties()
PatternAttributes attributes;
toSVGPatternElement(pattern->element())->collectPatternAttributes(attributes);
writeNameValuePair(ts, "patternUnits", attributes.patternUnits());
writeNameValuePair(ts, "patternContentUnits", attributes.patternContentUnits());
AffineTransform transform = attributes.patternTransform();
if (!transform.isIdentity())
ts << " [patternTransform=" << transform << "]";
ts << "\n";
} else if (resource->resourceType() == LinearGradientResourceType) {
RenderSVGResourceLinearGradient* gradient = static_cast<RenderSVGResourceLinearGradient*>(resource);
// Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
// link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
LinearGradientAttributes attributes;
toSVGLinearGradientElement(gradient->element())->collectGradientAttributes(attributes);
writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.gradientUnits());
ts << " [start=" << gradient->startPoint(attributes) << "] [end=" << gradient->endPoint(attributes) << "]\n";
} else if (resource->resourceType() == RadialGradientResourceType) {
RenderSVGResourceRadialGradient* gradient = toRenderSVGResourceRadialGradient(resource);
// Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
// link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
RadialGradientAttributes attributes;
toSVGRadialGradientElement(gradient->element())->collectGradientAttributes(attributes);
writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.gradientUnits());
FloatPoint focalPoint = gradient->focalPoint(attributes);
FloatPoint centerPoint = gradient->centerPoint(attributes);
float radius = gradient->radius(attributes);
float focalRadius = gradient->focalRadius(attributes);
ts << " [center=" << centerPoint << "] [focal=" << focalPoint << "] [radius=" << radius << "] [focalRadius=" << focalRadius << "]\n";
} else
ts << "\n";
writeChildren(ts, object, indent);
}
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());
}
RadialGradientAttributes SVGRadialGradientElement::collectGradientProperties() const
{
RadialGradientAttributes attributes;
HashSet<const SVGGradientElement*> processedGradients;
bool isRadial = true;
const SVGGradientElement* current = this;
while (current) {
if (!attributes.hasSpreadMethod() && current->hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod((GradientSpreadMethod) current->spreadMethod());
if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setBoundingBoxMode(current->gradientUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
if (!attributes.hasGradientTransform() && current->hasAttribute(SVGNames::gradientTransformAttr))
attributes.setGradientTransform(current->gradientTransform()->consolidate().matrix());
if (!attributes.hasStops()) {
const Vector<SVGGradientStop>& stops(current->buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isRadial) {
const SVGRadialGradientElement* radial = static_cast<const SVGRadialGradientElement*>(current);
if (!attributes.hasCx() && current->hasAttribute(SVGNames::cxAttr))
attributes.setCx(radial->cx().valueAsPercentage());
if (!attributes.hasCy() && current->hasAttribute(SVGNames::cyAttr))
attributes.setCy(radial->cy().valueAsPercentage());
if (!attributes.hasR() && current->hasAttribute(SVGNames::rAttr))
attributes.setR(radial->r().valueAsPercentage());
if (!attributes.hasFx() && current->hasAttribute(SVGNames::fxAttr))
attributes.setFx(radial->fx().valueAsPercentage());
if (!attributes.hasFy() && current->hasAttribute(SVGNames::fyAttr))
attributes.setFy(radial->fy().valueAsPercentage());
}
processedGradients.add(current);
// Respect xlink:href, take attributes from referenced element
Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
if (refNode && (refNode->hasTagName(SVGNames::radialGradientTag) || refNode->hasTagName(SVGNames::linearGradientTag))) {
current = static_cast<const SVGGradientElement*>(const_cast<const Node*>(refNode));
// Cycle detection
if (processedGradients.contains(current))
return RadialGradientAttributes();
isRadial = current->gradientType() == RadialGradientPaintServer;
} else
current = 0;
}
// Handle default values for fx/fy
if (!attributes.hasFx())
attributes.setFx(attributes.cx());
if (!attributes.hasFy())
attributes.setFy(attributes.cy());
return attributes;
}
float RenderSVGResourceRadialGradient::focalRadius(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolveLength(static_cast<const SVGElement*>(node()), attributes.gradientUnits(), attributes.fr());
}
static void setGradientAttributes(SVGGradientElement& element, RadialGradientAttributes& attributes, bool isRadial = true)
{
if (!attributes.hasSpreadMethod() && element.hasAttribute(SVGNames::spreadMethodAttr))
attributes.setSpreadMethod(element.spreadMethod());
if (!attributes.hasGradientUnits() && element.hasAttribute(SVGNames::gradientUnitsAttr))
attributes.setGradientUnits(element.gradientUnits());
if (!attributes.hasGradientTransform() && element.hasAttribute(SVGNames::gradientTransformAttr)) {
AffineTransform transform;
element.gradientTransform().concatenate(transform);
attributes.setGradientTransform(transform);
}
if (!attributes.hasStops()) {
const Vector<Gradient::ColorStop>& stops(element.buildStops());
if (!stops.isEmpty())
attributes.setStops(stops);
}
if (isRadial) {
SVGRadialGradientElement& radial = downcast<SVGRadialGradientElement>(element);
if (!attributes.hasCx() && element.hasAttribute(SVGNames::cxAttr))
attributes.setCx(radial.cx());
if (!attributes.hasCy() && element.hasAttribute(SVGNames::cyAttr))
attributes.setCy(radial.cy());
if (!attributes.hasR() && element.hasAttribute(SVGNames::rAttr))
attributes.setR(radial.r());
if (!attributes.hasFx() && element.hasAttribute(SVGNames::fxAttr))
attributes.setFx(radial.fx());
if (!attributes.hasFy() && element.hasAttribute(SVGNames::fyAttr))
attributes.setFy(radial.fy());
if (!attributes.hasFr() && element.hasAttribute(SVGNames::frAttr))
attributes.setFr(radial.fr());
}
}
float LayoutSVGResourceRadialGradient::focalRadius(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolveLength(element(), attributes.gradientUnits(), *attributes.fr());
}
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());
}
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()));
}
void writeSVGResourceContainer(TextStream& ts, const RenderObject& object, int indent)
{
writeStandardPrefix(ts, object, indent);
Element* element = static_cast<Element*>(object.node());
const AtomicString& id = element->getIdAttribute();
writeNameAndQuotedValue(ts, "id", id);
RenderSVGResourceContainer* resource = const_cast<RenderObject&>(object).toRenderSVGResourceContainer();
ASSERT(resource);
if (resource->resourceType() == MaskerResourceType) {
RenderSVGResourceMasker* masker = static_cast<RenderSVGResourceMasker*>(resource);
writeNameValuePair(ts, "maskUnits", masker->maskUnits());
writeNameValuePair(ts, "maskContentUnits", masker->maskContentUnits());
ts << "\n";
#if ENABLE(FILTERS)
} else if (resource->resourceType() == FilterResourceType) {
RenderSVGResourceFilter* filter = static_cast<RenderSVGResourceFilter*>(resource);
writeNameValuePair(ts, "filterUnits", filter->filterUnits());
writeNameValuePair(ts, "primitiveUnits", filter->primitiveUnits());
ts << "\n";
if (RefPtr<SVGFilterBuilder> builder = filter->buildPrimitives()) {
if (FilterEffect* lastEffect = builder->lastEffect())
lastEffect->externalRepresentation(ts, indent + 1);
}
#endif
} else if (resource->resourceType() == ClipperResourceType) {
RenderSVGResourceClipper* clipper = static_cast<RenderSVGResourceClipper*>(resource);
writeNameValuePair(ts, "clipPathUnits", clipper->clipPathUnits());
ts << "\n";
} else if (resource->resourceType() == MarkerResourceType) {
RenderSVGResourceMarker* marker = static_cast<RenderSVGResourceMarker*>(resource);
writeNameValuePair(ts, "markerUnits", marker->markerUnits());
ts << " [ref at " << marker->referencePoint() << "]";
ts << " [angle=";
if (marker->angle() == -1)
ts << "auto" << "]\n";
else
ts << marker->angle() << "]\n";
} else if (resource->resourceType() == PatternResourceType) {
RenderSVGResourcePattern* pattern = static_cast<RenderSVGResourcePattern*>(resource);
// Dump final results that are used for rendering. No use in asking SVGPatternElement for its patternUnits(), as it may
// link to other patterns using xlink:href, we need to build the full inheritance chain, aka. collectPatternProperties()
PatternAttributes attributes = static_cast<SVGPatternElement*>(pattern->node())->collectPatternProperties();
writeNameValuePair(ts, "patternUnits", boundingBoxModeString(attributes.boundingBoxMode()));
writeNameValuePair(ts, "patternContentUnits", boundingBoxModeString(attributes.boundingBoxModeContent()));
AffineTransform transform = attributes.patternTransform();
if (!transform.isIdentity())
ts << " [patternTransform=" << transform << "]";
ts << "\n";
} else if (resource->resourceType() == LinearGradientResourceType) {
RenderSVGResourceLinearGradient* gradient = static_cast<RenderSVGResourceLinearGradient*>(resource);
// Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
// link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
SVGLinearGradientElement* linearGradientElement = static_cast<SVGLinearGradientElement*>(gradient->node());
LinearGradientAttributes attributes = linearGradientElement->collectGradientProperties();
writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.boundingBoxMode());
FloatPoint startPoint;
FloatPoint endPoint;
linearGradientElement->calculateStartEndPoints(attributes, startPoint, endPoint);
ts << " [start=" << startPoint << "] [end=" << endPoint << "]\n";
} else if (resource->resourceType() == RadialGradientResourceType) {
RenderSVGResourceRadialGradient* gradient = static_cast<RenderSVGResourceRadialGradient*>(resource);
// Dump final results that are used for rendering. No use in asking SVGGradientElement for its gradientUnits(), as it may
// link to other gradients using xlink:href, we need to build the full inheritance chain, aka. collectGradientProperties()
SVGRadialGradientElement* radialGradientElement = static_cast<SVGRadialGradientElement*>(gradient->node());
RadialGradientAttributes attributes = radialGradientElement->collectGradientProperties();
writeCommonGradientProperties(ts, attributes.spreadMethod(), attributes.gradientTransform(), attributes.boundingBoxMode());
FloatPoint focalPoint;
FloatPoint centerPoint;
float radius;
radialGradientElement->calculateFocalCenterPointsAndRadius(attributes, focalPoint, centerPoint, radius);
ts << " [center=" << centerPoint << "] [focal=" << focalPoint << "] [radius=" << radius << "]\n";
} else
ts << "\n";
writeChildren(ts, object, indent);
}
float RenderSVGResourceRadialGradient::radius(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolveLength(element(), attributes.gradientUnits(), attributes.r());
}
FloatPoint RenderSVGResourceRadialGradient::centerPoint(const RadialGradientAttributes& attributes) const
{
return SVGLengthContext::resolvePoint(element(), attributes.gradientUnits(), attributes.cx(), attributes.cy());
}
