WebCore/rendering/SVGRenderSupport.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
  *           (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
  *           (C) 2007 Eric Seidel <eric@webkit.org>
  *           (C) 2009 Google, Inc.  All rights reserved.
  *           (C) 2009 Dirk Schulze <krit@webkit.org>
  * Copyright (C) Research In Motion Limited 2009-2010. 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"

 #if ENABLE(SVG)
 #include "SVGRenderSupport.h"

 #include "FrameView.h"
 #include "ImageBuffer.h"
 #include "NodeRenderStyle.h"
 #include "RenderLayer.h"
 #include "RenderPath.h"
 #include "RenderSVGResource.h"
 #include "RenderSVGResourceClipper.h"
 #include "RenderSVGResourceFilter.h"
 #include "RenderSVGResourceMarker.h"
 #include "RenderSVGResourceMasker.h"
 #include "RenderSVGRoot.h"
 #include "SVGResources.h"
 #include "SVGStyledElement.h"
 #include "TransformState.h"
 #include <wtf/UnusedParam.h>

 namespace WebCore {

 IntRect SVGRenderSupport::clippedOverflowRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer)
 {
     // Return early for any cases where we don't actually paint
     if (object->style()->visibility() != VISIBLE && !object->enclosingLayer()->hasVisibleContent())
         return IntRect();

     // Pass our local paint rect to computeRectForRepaint() which will
     // map to parent coords and recurse up the parent chain.
     IntRect repaintRect = enclosingIntRect(object->repaintRectInLocalCoordinates());
     object->computeRectForRepaint(repaintContainer, repaintRect);
     return repaintRect;
 }

 void SVGRenderSupport::computeRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
 {
     const SVGRenderStyle* svgStyle = object->style()->svgStyle();
     if (const ShadowData* shadow = svgStyle->shadow())
         shadow->adjustRectForShadow(repaintRect);

     // Translate to coords in our parent renderer, and then call computeRectForRepaint on our parent
     repaintRect = object->localToParentTransform().mapRect(repaintRect);
     object->parent()->computeRectForRepaint(repaintContainer, repaintRect, fixed);
 }

 void SVGRenderSupport::mapLocalToContainer(const RenderObject* object, RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState)
 {
     ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree.
     ASSERT(useTransforms); // Mapping a point through SVG w/o respecting transforms is useless.
     transformState.applyTransform(object->localToParentTransform());
     object->parent()->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
 }

 bool SVGRenderSupport::prepareToRenderSVGContent(RenderObject* object, PaintInfo& paintInfo)
 {
     ASSERT(object);

     RenderStyle* style = object->style();
     ASSERT(style);

     const SVGRenderStyle* svgStyle = style->svgStyle();
     ASSERT(svgStyle);

     // Setup transparency layers before setting up SVG resources!
     float opacity = style->opacity();
     const ShadowData* shadow = svgStyle->shadow();
     if (opacity < 1 || shadow) {
         FloatRect repaintRect = object->repaintRectInLocalCoordinates();

         if (opacity < 1) {
             paintInfo.context->clip(repaintRect);
             paintInfo.context->beginTransparencyLayer(opacity);
         }

         if (shadow) {
             paintInfo.context->clip(repaintRect);
             paintInfo.context->setShadow(IntSize(shadow->x(), shadow->y()), shadow->blur(), shadow->color(), style->colorSpace());
             paintInfo.context->beginTransparencyLayer(1);
         }
     }

     SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
     if (!resources)
         return true;

     if (RenderSVGResourceMasker* masker = resources->masker()) {
         if (!masker->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
             return false;
     }

     if (RenderSVGResourceClipper* clipper = resources->clipper()) {
         if (!clipper->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
             return false;
     }

 #if ENABLE(FILTERS)
     if (RenderSVGResourceFilter* filter = resources->filter()) {
         if (!filter->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
             return false;
     }
 #endif

     return true;
 }

 void SVGRenderSupport::finishRenderSVGContent(RenderObject* object, PaintInfo& paintInfo, GraphicsContext* savedContext)
 {
 #if !ENABLE(FILTERS)
     UNUSED_PARAM(savedContext);
 #endif

     ASSERT(object);

     const RenderStyle* style = object->style();
     ASSERT(style);

     const SVGRenderStyle* svgStyle = style->svgStyle();
     ASSERT(svgStyle);

 #if ENABLE(FILTERS)
     SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
     if (resources) {
         if (RenderSVGResourceFilter* filter = resources->filter()) {
             filter->postApplyResource(object, paintInfo.context, ApplyToDefaultMode);
             paintInfo.context = savedContext;
         }
     }
 #endif

     if (style->opacity() < 1)
         paintInfo.context->endTransparencyLayer();

     if (svgStyle->shadow())
         paintInfo.context->endTransparencyLayer();
 }

 void SVGRenderSupport::computeContainerBoundingBoxes(const RenderObject* container, FloatRect& objectBoundingBox, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox)
 {
     for (RenderObject* current = container->firstChild(); current; current = current->nextSibling()) {
         if (current->isSVGHiddenContainer())
             continue;

         const AffineTransform& transform = current->localToParentTransform();
         if (transform.isIdentity()) {
             objectBoundingBox.unite(current->objectBoundingBox());
             strokeBoundingBox.unite(current->strokeBoundingBox());
             repaintBoundingBox.unite(current->repaintRectInLocalCoordinates());
         } else {
             objectBoundingBox.unite(transform.mapRect(current->objectBoundingBox()));
             strokeBoundingBox.unite(transform.mapRect(current->strokeBoundingBox()));
             repaintBoundingBox.unite(transform.mapRect(current->repaintRectInLocalCoordinates()));
         }
     }
 }

 bool SVGRenderSupport::paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo& paintInfo)
 {
     if (localTransform.isIdentity())
         return localRepaintRect.intersects(paintInfo.rect);

     return localTransform.mapRect(localRepaintRect).intersects(paintInfo.rect);
 }

 const RenderSVGRoot* SVGRenderSupport::findTreeRootObject(const RenderObject* start)
 {
     while (start && !start->isSVGRoot())
         start = start->parent();

     ASSERT(start);
     ASSERT(start->isSVGRoot());
     return toRenderSVGRoot(start);
 }

 static inline void invalidateResourcesOfChildren(RenderObject* start)
 {
     ASSERT(!start->needsLayout());
     if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(start))
         resources->removeClientFromCache(start, false);

     for (RenderObject* child = start->firstChild(); child; child = child->nextSibling())
         invalidateResourcesOfChildren(child);
 }

 void SVGRenderSupport::layoutChildren(RenderObject* start, bool selfNeedsLayout)
 {
     bool layoutSizeChanged = findTreeRootObject(start)->isLayoutSizeChanged();
     HashSet<RenderObject*> notlayoutedObjects;

     for (RenderObject* child = start->firstChild(); child; child = child->nextSibling()) {
         bool needsLayout = selfNeedsLayout;

         if (layoutSizeChanged) {
             // When selfNeedsLayout is false and the layout size changed, we have to check whether this child uses relative lengths
             if (SVGElement* element = child->node()->isSVGElement() ? static_cast<SVGElement*>(child->node()) : 0) {
                 if (element->isStyled() && static_cast<SVGStyledElement*>(element)->hasRelativeLengths()) {
                     // When the layout size changed and when using relative values tell the RenderPath to update its Path object
                     if (child->isRenderPath())
                         toRenderPath(child)->setNeedsPathUpdate();

                     needsLayout = true;
                 }
             }
         }

         if (needsLayout) {
             child->setNeedsLayout(true, false);
             child->layout();
         } else {
             if (child->needsLayout())
                 child->layout();
             else if (layoutSizeChanged)
                 notlayoutedObjects.add(child);
         }

         ASSERT(!child->needsLayout());
     }

     if (!layoutSizeChanged) {
         ASSERT(notlayoutedObjects.isEmpty());
         return;
     }

     // If the layout size changed, invalidate all resources of all children that didn't go through the layout() code path.
     HashSet<RenderObject*>::iterator end = notlayoutedObjects.end();
     for (HashSet<RenderObject*>::iterator it = notlayoutedObjects.begin(); it != end; ++it)
         invalidateResourcesOfChildren(*it);
 }

 bool SVGRenderSupport::isOverflowHidden(const RenderObject* object)
 {
     // SVG doesn't support independent x/y overflow
     ASSERT(object->style()->overflowX() == object->style()->overflowY());

     // OSCROLL is never set for SVG - see CSSStyleSelector::adjustRenderStyle
     ASSERT(object->style()->overflowX() != OSCROLL);

     // RenderSVGRoot should never query for overflow state - it should always clip itself to the initial viewport size.
     ASSERT(!object->isRoot());

     return object->style()->overflowX() == OHIDDEN;
 }

 void SVGRenderSupport::intersectRepaintRectWithResources(const RenderObject* object, FloatRect& repaintRect)
 {
     ASSERT(object);

     RenderStyle* style = object->style();
     ASSERT(style);

     const SVGRenderStyle* svgStyle = style->svgStyle();
     ASSERT(svgStyle);

     RenderObject* renderer = const_cast<RenderObject*>(object);
     SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
     if (!resources) {
         if (const ShadowData* shadow = svgStyle->shadow())
             shadow->adjustRectForShadow(repaintRect);
         return;
     }

 #if ENABLE(FILTERS)
     if (RenderSVGResourceFilter* filter = resources->filter())
         repaintRect = filter->resourceBoundingBox(renderer);
 #endif

     if (RenderSVGResourceClipper* clipper = resources->clipper())
         repaintRect.intersect(clipper->resourceBoundingBox(renderer));

     if (RenderSVGResourceMasker* masker = resources->masker())
         repaintRect.intersect(masker->resourceBoundingBox(renderer));

     if (const ShadowData* shadow = svgStyle->shadow())
         shadow->adjustRectForShadow(repaintRect);
 }

 bool SVGRenderSupport::pointInClippingArea(RenderObject* object, const FloatPoint& point)
 {
     ASSERT(object);

     // We just take clippers into account to determine if a point is on the node. The Specification may
     // change later and we also need to check maskers.
     SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
     if (!resources)
         return true;

     if (RenderSVGResourceClipper* clipper = resources->clipper())
         return clipper->hitTestClipContent(object->objectBoundingBox(), point);

     return true;
 }

 void SVGRenderSupport::applyStrokeStyleToContext(GraphicsContext* context, const RenderStyle* style, const RenderObject* object)
 {
     ASSERT(context);
     ASSERT(style);
     ASSERT(object);
     ASSERT(object->node());
     ASSERT(object->node()->isSVGElement());

     const SVGRenderStyle* svgStyle = style->svgStyle();
     ASSERT(svgStyle);

     SVGElement* lengthContext = static_cast<SVGElement*>(object->node());
     context->setStrokeThickness(svgStyle->strokeWidth().value(lengthContext));
     context->setLineCap(svgStyle->capStyle());
     context->setLineJoin(svgStyle->joinStyle());
     if (svgStyle->joinStyle() == MiterJoin)
         context->setMiterLimit(svgStyle->strokeMiterLimit());

     const Vector<SVGLength>& dashes = svgStyle->strokeDashArray();
     if (dashes.isEmpty())
         context->setStrokeStyle(SolidStroke);
     else {
         DashArray dashArray;
         const Vector<SVGLength>::const_iterator end = dashes.end();
         for (Vector<SVGLength>::const_iterator it = dashes.begin(); it != end; ++it)
             dashArray.append((*it).value(lengthContext));

         context->setLineDash(dashArray, svgStyle->strokeDashOffset().value(lengthContext));
     }
 }

 const RenderObject* SVGRenderSupport::findTextRootObject(const RenderObject* start)
 {
     while (start && !start->isSVGText())
         start = start->parent();
     ASSERT(start);
     ASSERT(start->isSVGText());

     return start;
 }

 }

 #endif
	/*
	* Copyright (C) 2007, 2008 Rob Buis <buis@kde.org>
	* (C) 2007 Nikolas Zimmermann <zimmermann@kde.org>
	* (C) 2007 Eric Seidel <eric@webkit.org>
	* (C) 2009 Google, Inc. All rights reserved.
	* (C) 2009 Dirk Schulze <krit@webkit.org>
	* Copyright (C) Research In Motion Limited 2009-2010. 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"

	#if ENABLE(SVG)
	#include "SVGRenderSupport.h"

	#include "FrameView.h"
	#include "ImageBuffer.h"
	#include "NodeRenderStyle.h"
	#include "RenderLayer.h"
	#include "RenderPath.h"
	#include "RenderSVGResource.h"
	#include "RenderSVGResourceClipper.h"
	#include "RenderSVGResourceFilter.h"
	#include "RenderSVGResourceMarker.h"
	#include "RenderSVGResourceMasker.h"
	#include "RenderSVGRoot.h"
	#include "SVGResources.h"
	#include "SVGStyledElement.h"
	#include "TransformState.h"
	#include <wtf/UnusedParam.h>

	namespace WebCore {

	IntRect SVGRenderSupport::clippedOverflowRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer)
	{
	// Return early for any cases where we don't actually paint
	if (object->style()->visibility() != VISIBLE && !object->enclosingLayer()->hasVisibleContent())
	return IntRect();

	// Pass our local paint rect to computeRectForRepaint() which will
	// map to parent coords and recurse up the parent chain.
	IntRect repaintRect = enclosingIntRect(object->repaintRectInLocalCoordinates());
	object->computeRectForRepaint(repaintContainer, repaintRect);
	return repaintRect;
	}

	void SVGRenderSupport::computeRectForRepaint(RenderObject* object, RenderBoxModelObject* repaintContainer, IntRect& repaintRect, bool fixed)
	{
	const SVGRenderStyle* svgStyle = object->style()->svgStyle();
	if (const ShadowData* shadow = svgStyle->shadow())
	shadow->adjustRectForShadow(repaintRect);

	// Translate to coords in our parent renderer, and then call computeRectForRepaint on our parent
	repaintRect = object->localToParentTransform().mapRect(repaintRect);
	object->parent()->computeRectForRepaint(repaintContainer, repaintRect, fixed);
	}

	void SVGRenderSupport::mapLocalToContainer(const RenderObject* object, RenderBoxModelObject* repaintContainer, bool fixed , bool useTransforms, TransformState& transformState)
	{
	ASSERT(!fixed); // We should have no fixed content in the SVG rendering tree.
	ASSERT(useTransforms); // Mapping a point through SVG w/o respecting transforms is useless.
	transformState.applyTransform(object->localToParentTransform());
	object->parent()->mapLocalToContainer(repaintContainer, fixed, useTransforms, transformState);
	}

	bool SVGRenderSupport::prepareToRenderSVGContent(RenderObject* object, PaintInfo& paintInfo)
	{
	ASSERT(object);

	RenderStyle* style = object->style();
	ASSERT(style);

	const SVGRenderStyle* svgStyle = style->svgStyle();
	ASSERT(svgStyle);

	// Setup transparency layers before setting up SVG resources!
	float opacity = style->opacity();
	const ShadowData* shadow = svgStyle->shadow();
	if (opacity < 1 \|\| shadow) {
	FloatRect repaintRect = object->repaintRectInLocalCoordinates();

	if (opacity < 1) {
	paintInfo.context->clip(repaintRect);
	paintInfo.context->beginTransparencyLayer(opacity);
	}

	if (shadow) {
	paintInfo.context->clip(repaintRect);
	paintInfo.context->setShadow(IntSize(shadow->x(), shadow->y()), shadow->blur(), shadow->color(), style->colorSpace());
	paintInfo.context->beginTransparencyLayer(1);
	}
	}

	SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
	if (!resources)
	return true;

	if (RenderSVGResourceMasker* masker = resources->masker()) {
	if (!masker->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
	return false;
	}

	if (RenderSVGResourceClipper* clipper = resources->clipper()) {
	if (!clipper->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
	return false;
	}

	#if ENABLE(FILTERS)
	if (RenderSVGResourceFilter* filter = resources->filter()) {
	if (!filter->applyResource(object, style, paintInfo.context, ApplyToDefaultMode))
	return false;
	}
	#endif

	return true;
	}

	void SVGRenderSupport::finishRenderSVGContent(RenderObject* object, PaintInfo& paintInfo, GraphicsContext* savedContext)
	{
	#if !ENABLE(FILTERS)
	UNUSED_PARAM(savedContext);
	#endif

	ASSERT(object);

	const RenderStyle* style = object->style();
	ASSERT(style);

	const SVGRenderStyle* svgStyle = style->svgStyle();
	ASSERT(svgStyle);

	#if ENABLE(FILTERS)
	SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
	if (resources) {
	if (RenderSVGResourceFilter* filter = resources->filter()) {
	filter->postApplyResource(object, paintInfo.context, ApplyToDefaultMode);
	paintInfo.context = savedContext;
	}
	}
	#endif

	if (style->opacity() < 1)
	paintInfo.context->endTransparencyLayer();

	if (svgStyle->shadow())
	paintInfo.context->endTransparencyLayer();
	}

	void SVGRenderSupport::computeContainerBoundingBoxes(const RenderObject* container, FloatRect& objectBoundingBox, FloatRect& strokeBoundingBox, FloatRect& repaintBoundingBox)
	{
	for (RenderObject* current = container->firstChild(); current; current = current->nextSibling()) {
	if (current->isSVGHiddenContainer())
	continue;

	const AffineTransform& transform = current->localToParentTransform();
	if (transform.isIdentity()) {
	objectBoundingBox.unite(current->objectBoundingBox());
	strokeBoundingBox.unite(current->strokeBoundingBox());
	repaintBoundingBox.unite(current->repaintRectInLocalCoordinates());
	} else {
	objectBoundingBox.unite(transform.mapRect(current->objectBoundingBox()));
	strokeBoundingBox.unite(transform.mapRect(current->strokeBoundingBox()));
	repaintBoundingBox.unite(transform.mapRect(current->repaintRectInLocalCoordinates()));
	}
	}
	}

	bool SVGRenderSupport::paintInfoIntersectsRepaintRect(const FloatRect& localRepaintRect, const AffineTransform& localTransform, const PaintInfo& paintInfo)
	{
	if (localTransform.isIdentity())
	return localRepaintRect.intersects(paintInfo.rect);

	return localTransform.mapRect(localRepaintRect).intersects(paintInfo.rect);
	}

	const RenderSVGRoot* SVGRenderSupport::findTreeRootObject(const RenderObject* start)
	{
	while (start && !start->isSVGRoot())
	start = start->parent();

	ASSERT(start);
	ASSERT(start->isSVGRoot());
	return toRenderSVGRoot(start);
	}

	static inline void invalidateResourcesOfChildren(RenderObject* start)
	{
	ASSERT(!start->needsLayout());
	if (SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(start))
	resources->removeClientFromCache(start, false);

	for (RenderObject* child = start->firstChild(); child; child = child->nextSibling())
	invalidateResourcesOfChildren(child);
	}

	void SVGRenderSupport::layoutChildren(RenderObject* start, bool selfNeedsLayout)
	{
	bool layoutSizeChanged = findTreeRootObject(start)->isLayoutSizeChanged();
	HashSet<RenderObject*> notlayoutedObjects;

	for (RenderObject* child = start->firstChild(); child; child = child->nextSibling()) {
	bool needsLayout = selfNeedsLayout;

	if (layoutSizeChanged) {
	// When selfNeedsLayout is false and the layout size changed, we have to check whether this child uses relative lengths
	if (SVGElement* element = child->node()->isSVGElement() ? static_cast<SVGElement*>(child->node()) : 0) {
	if (element->isStyled() && static_cast<SVGStyledElement*>(element)->hasRelativeLengths()) {
	// When the layout size changed and when using relative values tell the RenderPath to update its Path object
	if (child->isRenderPath())
	toRenderPath(child)->setNeedsPathUpdate();

	needsLayout = true;
	}
	}
	}

	if (needsLayout) {
	child->setNeedsLayout(true, false);
	child->layout();
	} else {
	if (child->needsLayout())
	child->layout();
	else if (layoutSizeChanged)
	notlayoutedObjects.add(child);
	}

	ASSERT(!child->needsLayout());
	}

	if (!layoutSizeChanged) {
	ASSERT(notlayoutedObjects.isEmpty());
	return;
	}

	// If the layout size changed, invalidate all resources of all children that didn't go through the layout() code path.
	HashSet<RenderObject*>::iterator end = notlayoutedObjects.end();
	for (HashSet<RenderObject*>::iterator it = notlayoutedObjects.begin(); it != end; ++it)
	invalidateResourcesOfChildren(*it);
	}

	bool SVGRenderSupport::isOverflowHidden(const RenderObject* object)
	{
	// SVG doesn't support independent x/y overflow
	ASSERT(object->style()->overflowX() == object->style()->overflowY());

	// OSCROLL is never set for SVG - see CSSStyleSelector::adjustRenderStyle
	ASSERT(object->style()->overflowX() != OSCROLL);

	// RenderSVGRoot should never query for overflow state - it should always clip itself to the initial viewport size.
	ASSERT(!object->isRoot());

	return object->style()->overflowX() == OHIDDEN;
	}

	void SVGRenderSupport::intersectRepaintRectWithResources(const RenderObject* object, FloatRect& repaintRect)
	{
	ASSERT(object);

	RenderStyle* style = object->style();
	ASSERT(style);

	const SVGRenderStyle* svgStyle = style->svgStyle();
	ASSERT(svgStyle);

	RenderObject* renderer = const_cast<RenderObject*>(object);
	SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(renderer);
	if (!resources) {
	if (const ShadowData* shadow = svgStyle->shadow())
	shadow->adjustRectForShadow(repaintRect);
	return;
	}

	#if ENABLE(FILTERS)
	if (RenderSVGResourceFilter* filter = resources->filter())
	repaintRect = filter->resourceBoundingBox(renderer);
	#endif

	if (RenderSVGResourceClipper* clipper = resources->clipper())
	repaintRect.intersect(clipper->resourceBoundingBox(renderer));

	if (RenderSVGResourceMasker* masker = resources->masker())
	repaintRect.intersect(masker->resourceBoundingBox(renderer));

	if (const ShadowData* shadow = svgStyle->shadow())
	shadow->adjustRectForShadow(repaintRect);
	}

	bool SVGRenderSupport::pointInClippingArea(RenderObject* object, const FloatPoint& point)
	{
	ASSERT(object);

	// We just take clippers into account to determine if a point is on the node. The Specification may
	// change later and we also need to check maskers.
	SVGResources* resources = SVGResourcesCache::cachedResourcesForRenderObject(object);
	if (!resources)
	return true;

	if (RenderSVGResourceClipper* clipper = resources->clipper())
	return clipper->hitTestClipContent(object->objectBoundingBox(), point);

	return true;
	}

	void SVGRenderSupport::applyStrokeStyleToContext(GraphicsContext* context, const RenderStyle* style, const RenderObject* object)
	{
	ASSERT(context);
	ASSERT(style);
	ASSERT(object);
	ASSERT(object->node());
	ASSERT(object->node()->isSVGElement());

	const SVGRenderStyle* svgStyle = style->svgStyle();
	ASSERT(svgStyle);

	SVGElement* lengthContext = static_cast<SVGElement*>(object->node());
	context->setStrokeThickness(svgStyle->strokeWidth().value(lengthContext));
	context->setLineCap(svgStyle->capStyle());
	context->setLineJoin(svgStyle->joinStyle());
	if (svgStyle->joinStyle() == MiterJoin)
	context->setMiterLimit(svgStyle->strokeMiterLimit());

	const Vector<SVGLength>& dashes = svgStyle->strokeDashArray();
	if (dashes.isEmpty())
	context->setStrokeStyle(SolidStroke);
	else {
	DashArray dashArray;
	const Vector<SVGLength>::const_iterator end = dashes.end();
	for (Vector<SVGLength>::const_iterator it = dashes.begin(); it != end; ++it)
	dashArray.append((*it).value(lengthContext));

	context->setLineDash(dashArray, svgStyle->strokeDashOffset().value(lengthContext));
	}
	}

	const RenderObject* SVGRenderSupport::findTextRootObject(const RenderObject* start)
	{
	while (start && !start->isSVGText())
	start = start->parent();
	ASSERT(start);
	ASSERT(start->isSVGText());

	return start;
	}

	}

	#endif