root/Source/core/rendering/svg/SVGResources.cpp

DEFINITIONS

1. clipperFilterMaskerTags
2. supportsMarkers
3. fillAndStrokeTags
4. chainableResourceTags
5. targetReferenceFromResource
6. svgPaintTypeHasURL
7. paintingResourceFromSVGPaint
8. registerPendingResource
9. hasResourceData
10. ensureResources
11. buildResources
12. layoutIfNeeded
13. removeClientFromCache
14. resourceDestroyed
15. buildSetOfResources
16. setClipper
17. resetClipper
18. setFilter
19. resetFilter
20. setMarkerStart
21. resetMarkerStart
22. setMarkerMid
23. resetMarkerMid
24. setMarkerEnd
25. resetMarkerEnd
26. setMasker
27. resetMasker
28. setFill
29. resetFill
30. setStroke
31. resetStroke
32. setLinkedResource
33. resetLinkedResource
34. dump

/*
 * Copyright (C) Research In Motion Limited 2010. All rights reserved.
 *
 * This library is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Library General Public
 * License as published by the Free Software Foundation; either
 * version 2 of the License, or (at your option) any later version.
 *
 * This library is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Library General Public License for more details.
 *
 * You should have received a copy of the GNU Library General Public License
 * along with this library; see the file COPYING.LIB.  If not, write to
 * the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor,
 * Boston, MA 02110-1301, USA.
 */

#include "config.h"
#include "core/rendering/svg/SVGResources.h"

#include "SVGNames.h"
#include "core/rendering/style/SVGRenderStyle.h"
#include "core/rendering/svg/RenderSVGResourceClipper.h"
#include "core/rendering/svg/RenderSVGResourceFilter.h"
#include "core/rendering/svg/RenderSVGResourceMarker.h"
#include "core/rendering/svg/RenderSVGResourceMasker.h"
#include "core/svg/SVGFilterElement.h"
#include "core/svg/SVGGradientElement.h"
#include "core/svg/SVGPaint.h"
#include "core/svg/SVGPatternElement.h"
#include "core/svg/SVGURIReference.h"

#ifndef NDEBUG
#include <stdio.h>
#endif

namespace WebCore {

SVGResources::SVGResources()
    : m_linkedResource(0)
{
}

static HashSet<AtomicString>& clipperFilterMaskerTags()
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, s_tagList, ());
    if (s_tagList.isEmpty()) {
        // "container elements": http://www.w3.org/TR/SVG11/intro.html#TermContainerElement
        // "graphics elements" : http://www.w3.org/TR/SVG11/intro.html#TermGraphicsElement
        s_tagList.add(SVGNames::aTag.localName());
        s_tagList.add(SVGNames::circleTag.localName());
        s_tagList.add(SVGNames::ellipseTag.localName());
        s_tagList.add(SVGNames::glyphTag.localName());
        s_tagList.add(SVGNames::gTag.localName());
        s_tagList.add(SVGNames::imageTag.localName());
        s_tagList.add(SVGNames::lineTag.localName());
        s_tagList.add(SVGNames::markerTag.localName());
        s_tagList.add(SVGNames::maskTag.localName());
        s_tagList.add(SVGNames::missing_glyphTag.localName());
        s_tagList.add(SVGNames::pathTag.localName());
        s_tagList.add(SVGNames::polygonTag.localName());
        s_tagList.add(SVGNames::polylineTag.localName());
        s_tagList.add(SVGNames::rectTag.localName());
        s_tagList.add(SVGNames::svgTag.localName());
        s_tagList.add(SVGNames::textTag.localName());
        s_tagList.add(SVGNames::useTag.localName());

        // Not listed in the definitions is the clipPath element, the SVG spec says though:
        // The "clipPath" element or any of its children can specify property "clip-path".
        // So we have to add clipPathTag here, otherwhise clip-path on clipPath will fail.
        // (Already mailed SVG WG, waiting for a solution)
        s_tagList.add(SVGNames::clipPathTag.localName());

        // Not listed in the definitions are the text content elements, though filter/clipper/masker on tspan/text/.. is allowed.
        // (Already mailed SVG WG, waiting for a solution)
        s_tagList.add(SVGNames::altGlyphTag.localName());
        s_tagList.add(SVGNames::textPathTag.localName());
        s_tagList.add(SVGNames::tspanTag.localName());

        // Not listed in the definitions is the foreignObject element, but clip-path
        // is a supported attribute.
        s_tagList.add(SVGNames::foreignObjectTag.localName());

        // Elements that we ignore, as it doesn't make any sense.
        // defs, pattern, switch (FIXME: Mail SVG WG about these)
        // symbol (is converted to a svg element, when referenced by use, we can safely ignore it.)
    }

    return s_tagList;
}

bool SVGResources::supportsMarkers(const SVGElement& element)
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, s_tagList, ());
    if (s_tagList.isEmpty()) {
        s_tagList.add(SVGNames::lineTag.localName());
        s_tagList.add(SVGNames::pathTag.localName());
        s_tagList.add(SVGNames::polygonTag.localName());
        s_tagList.add(SVGNames::polylineTag.localName());
    }

    return s_tagList.contains(element.localName());
}

static HashSet<AtomicString>& fillAndStrokeTags()
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, s_tagList, ());
    if (s_tagList.isEmpty()) {
        s_tagList.add(SVGNames::altGlyphTag.localName());
        s_tagList.add(SVGNames::circleTag.localName());
        s_tagList.add(SVGNames::ellipseTag.localName());
        s_tagList.add(SVGNames::lineTag.localName());
        s_tagList.add(SVGNames::pathTag.localName());
        s_tagList.add(SVGNames::polygonTag.localName());
        s_tagList.add(SVGNames::polylineTag.localName());
        s_tagList.add(SVGNames::rectTag.localName());
        s_tagList.add(SVGNames::textTag.localName());
        s_tagList.add(SVGNames::textPathTag.localName());
        s_tagList.add(SVGNames::tspanTag.localName());
    }

    return s_tagList;
}

static HashSet<AtomicString>& chainableResourceTags()
{
    DEFINE_STATIC_LOCAL(HashSet<AtomicString>, s_tagList, ());
    if (s_tagList.isEmpty()) {
        s_tagList.add(SVGNames::linearGradientTag.localName());
        s_tagList.add(SVGNames::filterTag.localName());
        s_tagList.add(SVGNames::patternTag.localName());
        s_tagList.add(SVGNames::radialGradientTag.localName());
    }

    return s_tagList;
}

static inline AtomicString targetReferenceFromResource(SVGElement& element)
{
    String target;
    if (isSVGPatternElement(element))
        target = toSVGPatternElement(element).href()->currentValue()->value();
    else if (isSVGGradientElement(element))
        target = toSVGGradientElement(element).href()->currentValue()->value();
    else if (isSVGFilterElement(element))
        target = toSVGFilterElement(element).href()->currentValue()->value();
    else
        ASSERT_NOT_REACHED();

    return SVGURIReference::fragmentIdentifierFromIRIString(target, element.document());
}

static inline bool svgPaintTypeHasURL(SVGPaint::SVGPaintType paintType)
{
    switch (paintType) {
    case SVGPaint::SVG_PAINTTYPE_URI_NONE:
    case SVGPaint::SVG_PAINTTYPE_URI_CURRENTCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI_RGBCOLOR_ICCCOLOR:
    case SVGPaint::SVG_PAINTTYPE_URI:
        return true;
    default:
        break;
    }
    return false;
}

static inline RenderSVGResourceContainer* paintingResourceFromSVGPaint(Document& document, const SVGPaint::SVGPaintType& paintType, const String& paintUri, AtomicString& id, bool& hasPendingResource)
{
    if (!svgPaintTypeHasURL(paintType))
        return 0;

    id = SVGURIReference::fragmentIdentifierFromIRIString(paintUri, document);
    RenderSVGResourceContainer* container = getRenderSVGResourceContainerById(document, id);
    if (!container) {
        hasPendingResource = true;
        return 0;
    }

    RenderSVGResourceType resourceType = container->resourceType();
    if (resourceType != PatternResourceType && resourceType != LinearGradientResourceType && resourceType != RadialGradientResourceType)
        return 0;

    return container;
}

static inline void registerPendingResource(SVGDocumentExtensions& extensions, const AtomicString& id, SVGElement* element)
{
    ASSERT(element);
    extensions.addPendingResource(id, element);
}

bool SVGResources::hasResourceData() const
{
    return !m_clipperFilterMaskerData
        && !m_markerData
        && !m_fillStrokeData
        && !m_linkedResource;
}

static inline SVGResources* ensureResources(OwnPtr<SVGResources>& resources)
{
    if (!resources)
        resources = adoptPtr(new SVGResources);

    return resources.get();
}

PassOwnPtr<SVGResources> SVGResources::buildResources(const RenderObject* object, const SVGRenderStyle* style)
{
    ASSERT(object);
    ASSERT(style);

    Node* node = object->node();
    ASSERT(node);
    ASSERT_WITH_SECURITY_IMPLICATION(node->isSVGElement());

    SVGElement* element = toSVGElement(node);
    if (!element)
        return nullptr;

    Document& document = object->document();

    SVGDocumentExtensions& extensions = document.accessSVGExtensions();

    const AtomicString& tagName = element->localName();
    if (tagName.isNull())
        return nullptr;

    OwnPtr<SVGResources> resources;
    if (clipperFilterMaskerTags().contains(tagName)) {
        if (style->hasClipper()) {
            AtomicString id = style->clipperResource();
            if (!ensureResources(resources)->setClipper(getRenderSVGResourceById<RenderSVGResourceClipper>(document, id)))
                registerPendingResource(extensions, id, element);
        }

        if (style->hasFilter()) {
            AtomicString id = style->filterResource();
            if (!ensureResources(resources)->setFilter(getRenderSVGResourceById<RenderSVGResourceFilter>(document, id)))
                registerPendingResource(extensions, id, element);
        }

        if (style->hasMasker()) {
            AtomicString id = style->maskerResource();
            if (!ensureResources(resources)->setMasker(getRenderSVGResourceById<RenderSVGResourceMasker>(document, id)))
                registerPendingResource(extensions, id, element);
        }
    }

    if (style->hasMarkers() && supportsMarkers(*element)) {
        const AtomicString& markerStartId = style->markerStartResource();
        if (!ensureResources(resources)->setMarkerStart(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerStartId)))
            registerPendingResource(extensions, markerStartId, element);

        const AtomicString& markerMidId = style->markerMidResource();
        if (!ensureResources(resources)->setMarkerMid(getRenderSVGResourceById<RenderSVGResourceMarker>(document, markerMidId)))
            registerPendingResource(extensions, markerMidId, element);

        const AtomicString& markerEndId = style->markerEndResource();
        if (!ensureResources(resources)->setMarkerEnd(getRenderSVGResourceById<RenderSVGResourceMarker>(document, style->markerEndResource())))
            registerPendingResource(extensions, markerEndId, element);
    }

    if (fillAndStrokeTags().contains(tagName)) {
        if (style->hasFill()) {
            bool hasPendingResource = false;
            AtomicString id;
            RenderSVGResourceContainer* resource = paintingResourceFromSVGPaint(document, style->fillPaintType(), style->fillPaintUri(), id, hasPendingResource);
            if (!ensureResources(resources)->setFill(resource) && hasPendingResource) {
                registerPendingResource(extensions, id, element);
            }
        }

        if (style->hasStroke()) {
            bool hasPendingResource = false;
            AtomicString id;
            RenderSVGResourceContainer* resource = paintingResourceFromSVGPaint(document, style->strokePaintType(), style->strokePaintUri(), id, hasPendingResource);
            if (!ensureResources(resources)->setStroke(resource) && hasPendingResource) {
                registerPendingResource(extensions, id, element);
            }
        }
    }

    if (chainableResourceTags().contains(tagName)) {
        AtomicString id = targetReferenceFromResource(*element);
        if (!ensureResources(resources)->setLinkedResource(getRenderSVGResourceContainerById(document, id)))
            registerPendingResource(extensions, id, element);
    }

    return (!resources || resources->hasResourceData()) ? nullptr : resources.release();
}

void SVGResources::layoutIfNeeded()
{
    if (m_clipperFilterMaskerData) {
        if (RenderSVGResourceClipper* clipper = m_clipperFilterMaskerData->clipper)
            clipper->layoutIfNeeded();
        if (RenderSVGResourceMasker* masker = m_clipperFilterMaskerData->masker)
            masker->layoutIfNeeded();
        if (RenderSVGResourceFilter* filter = m_clipperFilterMaskerData->filter)
            filter->layoutIfNeeded();
    }

    if (m_markerData) {
        if (RenderSVGResourceMarker* marker = m_markerData->markerStart)
            marker->layoutIfNeeded();
        if (RenderSVGResourceMarker* marker = m_markerData->markerMid)
            marker->layoutIfNeeded();
        if (RenderSVGResourceMarker* marker = m_markerData->markerEnd)
            marker->layoutIfNeeded();
    }

    if (m_fillStrokeData) {
        if (RenderSVGResourceContainer* fill = m_fillStrokeData->fill)
            fill->layoutIfNeeded();
        if (RenderSVGResourceContainer* stroke = m_fillStrokeData->stroke)
            stroke->layoutIfNeeded();
    }

    if (m_linkedResource)
        m_linkedResource->layoutIfNeeded();
}

void SVGResources::removeClientFromCache(RenderObject* object, bool markForInvalidation) const
{
    if (hasResourceData())
        return;

    if (m_linkedResource) {
        ASSERT(!m_clipperFilterMaskerData);
        ASSERT(!m_markerData);
        ASSERT(!m_fillStrokeData);
        m_linkedResource->removeClientFromCache(object, markForInvalidation);
        return;
    }

    if (m_clipperFilterMaskerData) {
        if (m_clipperFilterMaskerData->clipper)
            m_clipperFilterMaskerData->clipper->removeClientFromCache(object, markForInvalidation);
        if (m_clipperFilterMaskerData->filter)
            m_clipperFilterMaskerData->filter->removeClientFromCache(object, markForInvalidation);
        if (m_clipperFilterMaskerData->masker)
            m_clipperFilterMaskerData->masker->removeClientFromCache(object, markForInvalidation);
    }

    if (m_markerData) {
        if (m_markerData->markerStart)
            m_markerData->markerStart->removeClientFromCache(object, markForInvalidation);
        if (m_markerData->markerMid)
            m_markerData->markerMid->removeClientFromCache(object, markForInvalidation);
        if (m_markerData->markerEnd)
            m_markerData->markerEnd->removeClientFromCache(object, markForInvalidation);
    }

    if (m_fillStrokeData) {
        if (m_fillStrokeData->fill)
            m_fillStrokeData->fill->removeClientFromCache(object, markForInvalidation);
        if (m_fillStrokeData->stroke)
            m_fillStrokeData->stroke->removeClientFromCache(object, markForInvalidation);
    }
}

void SVGResources::resourceDestroyed(RenderSVGResourceContainer* resource)
{
    ASSERT(resource);
    if (hasResourceData())
        return;

    if (m_linkedResource == resource) {
        ASSERT(!m_clipperFilterMaskerData);
        ASSERT(!m_markerData);
        ASSERT(!m_fillStrokeData);
        m_linkedResource->removeAllClientsFromCache();
        m_linkedResource = 0;
        return;
    }

    switch (resource->resourceType()) {
    case MaskerResourceType:
        if (!m_clipperFilterMaskerData)
            break;
        if (m_clipperFilterMaskerData->masker == resource) {
            m_clipperFilterMaskerData->masker->removeAllClientsFromCache();
            m_clipperFilterMaskerData->masker = 0;
        }
        break;
    case MarkerResourceType:
        if (!m_markerData)
            break;
        if (m_markerData->markerStart == resource) {
            m_markerData->markerStart->removeAllClientsFromCache();
            m_markerData->markerStart = 0;
        }
        if (m_markerData->markerMid == resource) {
            m_markerData->markerMid->removeAllClientsFromCache();
            m_markerData->markerMid = 0;
        }
        if (m_markerData->markerEnd == resource) {
            m_markerData->markerEnd->removeAllClientsFromCache();
            m_markerData->markerEnd = 0;
        }
        break;
    case PatternResourceType:
    case LinearGradientResourceType:
    case RadialGradientResourceType:
        if (!m_fillStrokeData)
            break;
        if (m_fillStrokeData->fill == resource) {
            m_fillStrokeData->fill->removeAllClientsFromCache();
            m_fillStrokeData->fill = 0;
        }
        if (m_fillStrokeData->stroke == resource) {
            m_fillStrokeData->stroke->removeAllClientsFromCache();
            m_fillStrokeData->stroke = 0;
        }
        break;
    case FilterResourceType:
        if (!m_clipperFilterMaskerData)
            break;
        if (m_clipperFilterMaskerData->filter == resource) {
            m_clipperFilterMaskerData->filter->removeAllClientsFromCache();
            m_clipperFilterMaskerData->filter = 0;
        }
        break;
    case ClipperResourceType:
        if (!m_clipperFilterMaskerData)
            break;
        if (m_clipperFilterMaskerData->clipper == resource) {
            m_clipperFilterMaskerData->clipper->removeAllClientsFromCache();
            m_clipperFilterMaskerData->clipper = 0;
        }
        break;
    case SolidColorResourceType:
        ASSERT_NOT_REACHED();
    }
}

void SVGResources::buildSetOfResources(HashSet<RenderSVGResourceContainer*>& set)
{
    if (hasResourceData())
        return;

    if (m_linkedResource) {
        ASSERT(!m_clipperFilterMaskerData);
        ASSERT(!m_markerData);
        ASSERT(!m_fillStrokeData);
        set.add(m_linkedResource);
        return;
    }

    if (m_clipperFilterMaskerData) {
        if (m_clipperFilterMaskerData->clipper)
            set.add(m_clipperFilterMaskerData->clipper);
        if (m_clipperFilterMaskerData->filter)
            set.add(m_clipperFilterMaskerData->filter);
        if (m_clipperFilterMaskerData->masker)
            set.add(m_clipperFilterMaskerData->masker);
    }

    if (m_markerData) {
        if (m_markerData->markerStart)
            set.add(m_markerData->markerStart);
        if (m_markerData->markerMid)
            set.add(m_markerData->markerMid);
        if (m_markerData->markerEnd)
            set.add(m_markerData->markerEnd);
    }

    if (m_fillStrokeData) {
        if (m_fillStrokeData->fill)
            set.add(m_fillStrokeData->fill);
        if (m_fillStrokeData->stroke)
            set.add(m_fillStrokeData->stroke);
    }
}

bool SVGResources::setClipper(RenderSVGResourceClipper* clipper)
{
    if (!clipper)
        return false;

    ASSERT(clipper->resourceType() == ClipperResourceType);

    if (!m_clipperFilterMaskerData)
        m_clipperFilterMaskerData = ClipperFilterMaskerData::create();

    m_clipperFilterMaskerData->clipper = clipper;
    return true;
}

void SVGResources::resetClipper()
{
    ASSERT(m_clipperFilterMaskerData);
    ASSERT(m_clipperFilterMaskerData->clipper);
    m_clipperFilterMaskerData->clipper = 0;
}

bool SVGResources::setFilter(RenderSVGResourceFilter* filter)
{
    if (!filter)
        return false;

    ASSERT(filter->resourceType() == FilterResourceType);

    if (!m_clipperFilterMaskerData)
        m_clipperFilterMaskerData = ClipperFilterMaskerData::create();

    m_clipperFilterMaskerData->filter = filter;
    return true;
}

void SVGResources::resetFilter()
{
    ASSERT(m_clipperFilterMaskerData);
    ASSERT(m_clipperFilterMaskerData->filter);
    m_clipperFilterMaskerData->filter = 0;
}

bool SVGResources::setMarkerStart(RenderSVGResourceMarker* markerStart)
{
    if (!markerStart)
        return false;

    ASSERT(markerStart->resourceType() == MarkerResourceType);

    if (!m_markerData)
        m_markerData = MarkerData::create();

    m_markerData->markerStart = markerStart;
    return true;
}

void SVGResources::resetMarkerStart()
{
    ASSERT(m_markerData);
    ASSERT(m_markerData->markerStart);
    m_markerData->markerStart = 0;
}

bool SVGResources::setMarkerMid(RenderSVGResourceMarker* markerMid)
{
    if (!markerMid)
        return false;

    ASSERT(markerMid->resourceType() == MarkerResourceType);

    if (!m_markerData)
        m_markerData = MarkerData::create();

    m_markerData->markerMid = markerMid;
    return true;
}

void SVGResources::resetMarkerMid()
{
    ASSERT(m_markerData);
    ASSERT(m_markerData->markerMid);
    m_markerData->markerMid = 0;
}

bool SVGResources::setMarkerEnd(RenderSVGResourceMarker* markerEnd)
{
    if (!markerEnd)
        return false;

    ASSERT(markerEnd->resourceType() == MarkerResourceType);

    if (!m_markerData)
        m_markerData = MarkerData::create();

    m_markerData->markerEnd = markerEnd;
    return true;
}

void SVGResources::resetMarkerEnd()
{
    ASSERT(m_markerData);
    ASSERT(m_markerData->markerEnd);
    m_markerData->markerEnd = 0;
}

bool SVGResources::setMasker(RenderSVGResourceMasker* masker)
{
    if (!masker)
        return false;

    ASSERT(masker->resourceType() == MaskerResourceType);

    if (!m_clipperFilterMaskerData)
        m_clipperFilterMaskerData = ClipperFilterMaskerData::create();

    m_clipperFilterMaskerData->masker = masker;
    return true;
}

void SVGResources::resetMasker()
{
    ASSERT(m_clipperFilterMaskerData);
    ASSERT(m_clipperFilterMaskerData->masker);
    m_clipperFilterMaskerData->masker = 0;
}

bool SVGResources::setFill(RenderSVGResourceContainer* fill)
{
    if (!fill)
        return false;

    ASSERT(fill->resourceType() == PatternResourceType
           || fill->resourceType() == LinearGradientResourceType
           || fill->resourceType() == RadialGradientResourceType);

    if (!m_fillStrokeData)
        m_fillStrokeData = FillStrokeData::create();

    m_fillStrokeData->fill = fill;
    return true;
}

void SVGResources::resetFill()
{
    ASSERT(m_fillStrokeData);
    ASSERT(m_fillStrokeData->fill);
    m_fillStrokeData->fill = 0;
}

bool SVGResources::setStroke(RenderSVGResourceContainer* stroke)
{
    if (!stroke)
        return false;

    ASSERT(stroke->resourceType() == PatternResourceType
           || stroke->resourceType() == LinearGradientResourceType
           || stroke->resourceType() == RadialGradientResourceType);

    if (!m_fillStrokeData)
        m_fillStrokeData = FillStrokeData::create();

    m_fillStrokeData->stroke = stroke;
    return true;
}

void SVGResources::resetStroke()
{
    ASSERT(m_fillStrokeData);
    ASSERT(m_fillStrokeData->stroke);
    m_fillStrokeData->stroke = 0;
}

bool SVGResources::setLinkedResource(RenderSVGResourceContainer* linkedResource)
{
    if (!linkedResource)
        return false;

    m_linkedResource = linkedResource;
    return true;
}

void SVGResources::resetLinkedResource()
{
    ASSERT(m_linkedResource);
    m_linkedResource = 0;
}

#ifndef NDEBUG
void SVGResources::dump(const RenderObject* object)
{
    ASSERT(object);
    ASSERT(object->node());

    fprintf(stderr, "-> this=%p, SVGResources(renderer=%p, node=%p)\n", this, object, object->node());
    fprintf(stderr, " | DOM Tree:\n");
    object->node()->showTreeForThis();

    fprintf(stderr, "\n | List of resources:\n");
    if (m_clipperFilterMaskerData) {
        if (RenderSVGResourceClipper* clipper = m_clipperFilterMaskerData->clipper)
            fprintf(stderr, " |-> Clipper    : %p (node=%p)\n", clipper, clipper->element());
        if (RenderSVGResourceFilter* filter = m_clipperFilterMaskerData->filter)
            fprintf(stderr, " |-> Filter     : %p (node=%p)\n", filter, filter->element());
        if (RenderSVGResourceMasker* masker = m_clipperFilterMaskerData->masker)
            fprintf(stderr, " |-> Masker     : %p (node=%p)\n", masker, masker->element());
    }

    if (m_markerData) {
        if (RenderSVGResourceMarker* markerStart = m_markerData->markerStart)
            fprintf(stderr, " |-> MarkerStart: %p (node=%p)\n", markerStart, markerStart->element());
        if (RenderSVGResourceMarker* markerMid = m_markerData->markerMid)
            fprintf(stderr, " |-> MarkerMid  : %p (node=%p)\n", markerMid, markerMid->element());
        if (RenderSVGResourceMarker* markerEnd = m_markerData->markerEnd)
            fprintf(stderr, " |-> MarkerEnd  : %p (node=%p)\n", markerEnd, markerEnd->element());
    }

    if (m_fillStrokeData) {
        if (RenderSVGResourceContainer* fill = m_fillStrokeData->fill)
            fprintf(stderr, " |-> Fill       : %p (node=%p)\n", fill, fill->element());
        if (RenderSVGResourceContainer* stroke = m_fillStrokeData->stroke)
            fprintf(stderr, " |-> Stroke     : %p (node=%p)\n", stroke, stroke->element());
    }

    if (m_linkedResource)
        fprintf(stderr, " |-> xlink:href : %p (node=%p)\n", m_linkedResource, m_linkedResource->element());
}
#endif

}