Source/WebCore/rendering/svg/RenderSVGResourceFilter.cpp - WebKit - Git at Google

 /*
  * Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
  * Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
  * Copyright (C) 2005 Eric Seidel <eric@webkit.org>
  * Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
  * 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 "RenderSVGResourceFilter.h"

 #include "ElementChildIterator.h"
 #include "FilterEffect.h"
 #include "FloatPoint.h"
 #include "Frame.h"
 #include "GraphicsContext.h"
 #include "Image.h"
 #include "ImageData.h"
 #include "IntRect.h"
 #include "Logging.h"
 #include "RenderSVGResourceFilterInlines.h"
 #include "RenderSVGResourceFilterPrimitive.h"
 #include "RenderView.h"
 #include "SVGElementTypeHelpers.h"
 #include "SVGFilterPrimitiveStandardAttributes.h"
 #include "SVGNames.h"
 #include "SVGRenderingContext.h"
 #include "Settings.h"
 #include "SourceGraphic.h"
 #include <wtf/IsoMallocInlines.h>
 #include <wtf/text/TextStream.h>

 namespace WebCore {

 WTF_MAKE_ISO_ALLOCATED_IMPL(FilterData);
 WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGResourceFilter);

 RenderSVGResourceFilter::RenderSVGResourceFilter(SVGFilterElement& element, RenderStyle&& style)
     : RenderSVGResourceContainer(element, WTFMove(style))
 {
 }

 RenderSVGResourceFilter::~RenderSVGResourceFilter() = default;

 void RenderSVGResourceFilter::removeAllClientsFromCache(bool markForInvalidation)
 {
     LOG(Filters, "RenderSVGResourceFilter %p removeAllClientsFromCache", this);

     m_rendererFilterDataMap.clear();

     markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
 }

 void RenderSVGResourceFilter::removeClientFromCache(RenderElement& client, bool markForInvalidation)
 {
     LOG(Filters, "RenderSVGResourceFilter %p removing client %p", this, &client);

     auto findResult = m_rendererFilterDataMap.find(&client);
     if (findResult != m_rendererFilterDataMap.end()) {
         FilterData& filterData = *findResult->value;
         if (filterData.savedContext)
             filterData.state = FilterData::MarkedForRemoval;
         else
             m_rendererFilterDataMap.remove(findResult);
     }

     markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
 }

 bool RenderSVGResourceFilter::applyResource(RenderElement& renderer, const RenderStyle&, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode)
 {
     ASSERT(context);
     ASSERT_UNUSED(resourceMode, !resourceMode);

     LOG(Filters, "RenderSVGResourceFilter %p applyResource renderer %p", this, &renderer);

     if (m_rendererFilterDataMap.contains(&renderer)) {
         FilterData* filterData = m_rendererFilterDataMap.get(&renderer);
         if (filterData->state == FilterData::PaintingSource || filterData->state == FilterData::Applying)
             filterData->state = FilterData::CycleDetected;
         return false; // Already built, or we're in a cycle, or we're marked for removal. Regardless, just do nothing more now.
     }

     auto addResult = m_rendererFilterDataMap.set(&renderer, makeUnique<FilterData>());
     auto filterData = addResult.iterator->value.get();

     FloatRect targetBoundingBox = renderer.objectBoundingBox();

     filterData->boundaries = SVGLengthContext::resolveRectangle<SVGFilterElement>(&filterElement(), filterElement().filterUnits(), targetBoundingBox);
     if (filterData->boundaries.isEmpty()) {
         m_rendererFilterDataMap.remove(&renderer);
         return false;
     }

     // Determine absolute transformation matrix for filter.
     AffineTransform absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
     if (!absoluteTransform.isInvertible()) {
         m_rendererFilterDataMap.remove(&renderer);
         return false;
     }

     // Eliminate shear of the absolute transformation matrix, to be able to produce unsheared tile images for feTile.
     FloatSize filterScale(absoluteTransform.xScale(), absoluteTransform.yScale());

     // Determine absolute boundaries of the filter and the drawing region.
     filterData->drawingRegion = renderer.strokeBoundingBox();
     filterData->drawingRegion.intersect(filterData->boundaries);

     // Determine scale factor for filter. The size of intermediate ImageBuffers shouldn't be bigger than kMaxFilterSize.
     FloatRect absoluteDrawingRegion = filterData->drawingRegion;
     absoluteDrawingRegion.scale(filterScale);
     ImageBuffer::sizeNeedsClamping(absoluteDrawingRegion.size(), filterScale);

     // Create the SVGFilter object.
     filterData->builder = makeUnique<SVGFilterBuilder>();
     filterData->filter = SVGFilter::create(filterElement(), *filterData->builder, filterScale, absoluteDrawingRegion, filterData->boundaries, targetBoundingBox);
     if (!filterData->filter) {
         m_rendererFilterDataMap.remove(&renderer);
         return false;
     }

     auto lastEffect = filterData->builder->lastEffect();
     ASSERT(lastEffect);

     LOG_WITH_STREAM(Filters, stream << "RenderSVGResourceFilter::applyResource\n" << *filterData->builder->lastEffect());

     lastEffect->determineFilterPrimitiveSubregion(*filterData->filter);
     FloatRect subRegion = lastEffect->maxEffectRect();

     // At least one FilterEffect has a too big image size,
     // recalculate the effect sizes with new scale factors.
     if (ImageBuffer::sizeNeedsClamping(subRegion.size(), filterScale)) {
         filterData->filter->setFilterScale(filterScale);
         lastEffect->determineFilterPrimitiveSubregion(*filterData->filter);
     }

     // If the drawingRegion is empty, we have something like <g filter=".."/>.
     // Even if the target objectBoundingBox() is empty, we still have to draw the last effect result image in postApplyResource.
     if (filterData->drawingRegion.isEmpty()) {
         ASSERT(m_rendererFilterDataMap.contains(&renderer));
         filterData->savedContext = context;
         return false;
     }

     // Change the coordinate transformation applied to the filtered element to reflect the resolution of the filter.
     AffineTransform effectiveTransform = AffineTransform(filterScale.width(), 0, 0, filterScale.height(), 0, 0);

     auto renderingMode = renderer.settings().acceleratedFiltersEnabled() ? RenderingMode::Accelerated : RenderingMode::Unaccelerated;
 #if ENABLE(DESTINATION_COLOR_SPACE_LINEAR_SRGB)
     auto colorSpace = DestinationColorSpace::LinearSRGB();
 #else
     auto colorSpace = DestinationColorSpace::SRGB();
 #endif
     auto sourceGraphic = SVGRenderingContext::createImageBuffer(filterData->drawingRegion, effectiveTransform, colorSpace, renderingMode, context);
     if (!sourceGraphic) {
         ASSERT(m_rendererFilterDataMap.contains(&renderer));
         filterData->savedContext = context;
         return false;
     }

     // Set the rendering mode from the page's settings.
     filterData->filter->setRenderingMode(renderingMode);

     GraphicsContext& sourceGraphicContext = sourceGraphic->context();

     filterData->sourceGraphicBuffer = WTFMove(sourceGraphic);
     filterData->savedContext = context;

     context = &sourceGraphicContext;

     ASSERT(m_rendererFilterDataMap.contains(&renderer));
     return true;
 }

 void RenderSVGResourceFilter::postApplyResource(RenderElement& renderer, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode, const Path*, const RenderSVGShape*)
 {
     ASSERT(context);
     ASSERT_UNUSED(resourceMode, !resourceMode);

     auto findResult = m_rendererFilterDataMap.find(&renderer);
     if (findResult == m_rendererFilterDataMap.end())
         return;

     FilterData& filterData = *findResult->value;

     LOG_WITH_STREAM(Filters, stream << "\nRenderSVGResourceFilter " << this << " postApplyResource - renderer " << &renderer << " filter state " << filterData.state);

     switch (filterData.state) {
     case FilterData::MarkedForRemoval:
         m_rendererFilterDataMap.remove(findResult);
         return;

     case FilterData::CycleDetected:
     case FilterData::Applying:
         // We have a cycle if we are already applying the data.
         // This can occur due to FeImage referencing a source that makes use of the FEImage itself.
         // This is the first place we've hit the cycle, so set the state back to PaintingSource so the return stack
         // will continue correctly.
         filterData.state = FilterData::PaintingSource;
         return;

     case FilterData::PaintingSource:
         if (!filterData.savedContext) {
             removeClientFromCache(renderer);
             return;
         }

         context = filterData.savedContext;
         filterData.savedContext = nullptr;
         break;

     case FilterData::Built:
         break;
     }

     auto lastEffect = filterData.filter->lastEffect();

     if (lastEffect && !filterData.boundaries.isEmpty() && !lastEffect->filterPrimitiveSubregion().isEmpty()) {
         // This is the real filtering of the object. It just needs to be called on the
         // initial filtering process. We just take the stored filter result on a
         // second drawing.
         if (filterData.state != FilterData::Built)
             filterData.filter->setSourceImage(WTFMove(filterData.sourceGraphicBuffer));

         // Always true if filterData is just built (filterData->state == FilterData::Built).
         if (!lastEffect->hasResult()) {
             filterData.state = FilterData::Applying;
             filterData.filter->apply();
             lastEffect->correctPremultipliedResultIfNeeded();
             lastEffect->transformResultColorSpace(DestinationColorSpace::SRGB());
         }
         filterData.state = FilterData::Built;

         if (auto result = lastEffect->filterImage()) {
             auto resultImage = result->imageBuffer();
             context->scale(FloatSize(1 / filterData.filter->filterScale().width(), 1 / filterData.filter->filterScale().height()));
             context->drawImageBuffer(*resultImage, result->absoluteImageRect());
             context->scale(filterData.filter->filterScale());
         }
     }
     filterData.sourceGraphicBuffer = nullptr;

     LOG_WITH_STREAM(Filters, stream << "RenderSVGResourceFilter " << this << " postApplyResource done\n");
 }

 FloatRect RenderSVGResourceFilter::resourceBoundingBox(const RenderObject& object)
 {
     return SVGLengthContext::resolveRectangle<SVGFilterElement>(&filterElement(), filterElement().filterUnits(), object.objectBoundingBox());
 }

 void RenderSVGResourceFilter::primitiveAttributeChanged(RenderObject* object, const QualifiedName& attribute)
 {
     SVGFilterPrimitiveStandardAttributes* primitve = static_cast<SVGFilterPrimitiveStandardAttributes*>(object->node());

     LOG(Filters, "RenderSVGResourceFilter %p primitiveAttributeChanged renderer %p", this, object);

     for (const auto& objectFilterDataPair : m_rendererFilterDataMap) {
         const auto& filterData = objectFilterDataPair.value;
         if (filterData->state != FilterData::Built)
             continue;

         SVGFilterBuilder* builder = filterData->builder.get();
         FilterEffect* effect = builder->effectByRenderer(object);
         if (!effect)
             continue;
         // Since all effects shares the same attribute value, all
         // or none of them will be changed.
         if (!primitve->setFilterEffectAttribute(effect, attribute))
             return;
         builder->clearResultsRecursive(effect);

         // Repaint the image on the screen.
         markClientForInvalidation(*objectFilterDataPair.key, RepaintInvalidation);
     }
     markAllClientLayersForInvalidation();
 }

 FloatRect RenderSVGResourceFilter::drawingRegion(RenderObject* object) const
 {
     FilterData* filterData = m_rendererFilterDataMap.get(object);
     return filterData ? filterData->drawingRegion : FloatRect();
 }

 TextStream& operator<<(TextStream& ts, FilterData::FilterDataState state)
 {
     switch (state) {
     case FilterData::PaintingSource:
         ts << "painting source";
         break;
     case FilterData::Applying:
         ts << "applying";
         break;
     case FilterData::Built:
         ts << "built";
         break;
     case FilterData::CycleDetected:
         ts << "cycle detected";
         break;
     case FilterData::MarkedForRemoval:
         ts << "marked for removal";
         break;
     }
     return ts;
 }

 } // namespace WebCore
	/*
	* Copyright (C) 2004, 2005, 2006, 2007 Nikolas Zimmermann <zimmermann@kde.org>
	* Copyright (C) 2004, 2005 Rob Buis <buis@kde.org>
	* Copyright (C) 2005 Eric Seidel <eric@webkit.org>
	* Copyright (C) 2009 Dirk Schulze <krit@webkit.org>
	* 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 "RenderSVGResourceFilter.h"

	#include "ElementChildIterator.h"
	#include "FilterEffect.h"
	#include "FloatPoint.h"
	#include "Frame.h"
	#include "GraphicsContext.h"
	#include "Image.h"
	#include "ImageData.h"
	#include "IntRect.h"
	#include "Logging.h"
	#include "RenderSVGResourceFilterInlines.h"
	#include "RenderSVGResourceFilterPrimitive.h"
	#include "RenderView.h"
	#include "SVGElementTypeHelpers.h"
	#include "SVGFilterPrimitiveStandardAttributes.h"
	#include "SVGNames.h"
	#include "SVGRenderingContext.h"
	#include "Settings.h"
	#include "SourceGraphic.h"
	#include <wtf/IsoMallocInlines.h>
	#include <wtf/text/TextStream.h>

	namespace WebCore {

	WTF_MAKE_ISO_ALLOCATED_IMPL(FilterData);
	WTF_MAKE_ISO_ALLOCATED_IMPL(RenderSVGResourceFilter);

	RenderSVGResourceFilter::RenderSVGResourceFilter(SVGFilterElement& element, RenderStyle&& style)
	: RenderSVGResourceContainer(element, WTFMove(style))
	{
	}

	RenderSVGResourceFilter::~RenderSVGResourceFilter() = default;

	void RenderSVGResourceFilter::removeAllClientsFromCache(bool markForInvalidation)
	{
	LOG(Filters, "RenderSVGResourceFilter %p removeAllClientsFromCache", this);

	m_rendererFilterDataMap.clear();

	markAllClientsForInvalidation(markForInvalidation ? LayoutAndBoundariesInvalidation : ParentOnlyInvalidation);
	}

	void RenderSVGResourceFilter::removeClientFromCache(RenderElement& client, bool markForInvalidation)
	{
	LOG(Filters, "RenderSVGResourceFilter %p removing client %p", this, &client);

	auto findResult = m_rendererFilterDataMap.find(&client);
	if (findResult != m_rendererFilterDataMap.end()) {
	FilterData& filterData = *findResult->value;
	if (filterData.savedContext)
	filterData.state = FilterData::MarkedForRemoval;
	else
	m_rendererFilterDataMap.remove(findResult);
	}

	markClientForInvalidation(client, markForInvalidation ? BoundariesInvalidation : ParentOnlyInvalidation);
	}

	bool RenderSVGResourceFilter::applyResource(RenderElement& renderer, const RenderStyle&, GraphicsContext*& context, OptionSet<RenderSVGResourceMode> resourceMode)
	{
	ASSERT(context);
	ASSERT_UNUSED(resourceMode, !resourceMode);

	LOG(Filters, "RenderSVGResourceFilter %p applyResource renderer %p", this, &renderer);

	if (m_rendererFilterDataMap.contains(&renderer)) {
	FilterData* filterData = m_rendererFilterDataMap.get(&renderer);
	if (filterData->state == FilterData::PaintingSource \|\| filterData->state == FilterData::Applying)
	filterData->state = FilterData::CycleDetected;
	return false; // Already built, or we're in a cycle, or we're marked for removal. Regardless, just do nothing more now.
	}

	auto addResult = m_rendererFilterDataMap.set(&renderer, makeUnique<FilterData>());
	auto filterData = addResult.iterator->value.get();

	FloatRect targetBoundingBox = renderer.objectBoundingBox();

	filterData->boundaries = SVGLengthContext::resolveRectangle<SVGFilterElement>(&filterElement(), filterElement().filterUnits(), targetBoundingBox);
	if (filterData->boundaries.isEmpty()) {
	m_rendererFilterDataMap.remove(&renderer);
	return false;
	}

	// Determine absolute transformation matrix for filter.
	AffineTransform absoluteTransform = SVGRenderingContext::calculateTransformationToOutermostCoordinateSystem(renderer);
	if (!absoluteTransform.isInvertible()) {
	m_rendererFilterDataMap.remove(&renderer);
	return false;
	}

	// Eliminate shear of the absolute transformation matrix, to be able to produce unsheared tile images for feTile.
	FloatSize filterScale(absoluteTransform.xScale(), absoluteTransform.yScale());

	// Determine absolute boundaries of the filter and the drawing region.
	filterData->drawingRegion = renderer.strokeBoundingBox();
	filterData->drawingRegion.intersect(filterData->boundaries);

	// Determine scale factor for filter. The size of intermediate ImageBuffers shouldn't be bigger than kMaxFilterSize.
	FloatRect absoluteDrawingRegion = filterData->drawingRegion;
	absoluteDrawingRegion.scale(filterScale);
	ImageBuffer::sizeNeedsClamping(absoluteDrawingRegion.size(), filterScale);

	// Create the SVGFilter object.
	filterData->builder = makeUnique<SVGFilterBuilder>();
	filterData->filter = SVGFilter::create(filterElement(), *filterData->builder, filterScale, absoluteDrawingRegion, filterData->boundaries, targetBoundingBox);
	if (!filterData->filter) {
	m_rendererFilterDataMap.remove(&renderer);
	return false;
	}

	auto lastEffect = filterData->builder->lastEffect();
	ASSERT(lastEffect);

	LOG_WITH_STREAM(Filters, stream << "RenderSVGResourceFilter::applyResource\n" << *filterData->builder->lastEffect());

	lastEffect->determineFilterPrimitiveSubregion(*filterData->filter);
	FloatRect subRegion = lastEffect->maxEffectRect();

	// At least one FilterEffect has a too big image size,
	// recalculate the effect sizes with new scale factors.
	if (ImageBuffer::sizeNeedsClamping(subRegion.size(), filterScale)) {
	filterData->filter->setFilterScale(filterScale);
	lastEffect->determineFilterPrimitiveSubregion(*filterData->filter);
	}

	// If the drawingRegion is empty, we have something like <g filter=".."/>.
	// Even if the target objectBoundingBox() is empty, we still have to draw the last effect result image in postApplyResource.
	if (filterData->drawingRegion.isEmpty()) {
	ASSERT(m_rendererFilterDataMap.contains(&renderer));
	filterData->savedContext = context;
	return false;
	}

	// Change the coordinate transformation applied to the filtered element to reflect the resolution of the filter.
	AffineTransform effectiveTransform = AffineTransform(filterScale.width(), 0, 0, filterScale.height(), 0, 0);

	auto renderingMode = renderer.settings().acceleratedFiltersEnabled() ? RenderingMode::Accelerated : RenderingMode::Unaccelerated;
	#if ENABLE(DESTINATION_COLOR_SPACE_LINEAR_SRGB)
	auto colorSpace = DestinationColorSpace::LinearSRGB();
	#else
	auto colorSpace = DestinationColorSpace::SRGB();
	#endif
	auto sourceGraphic = SVGRenderingContext::createImageBuffer(filterData->drawingRegion, effectiveTransform, colorSpace, renderingMode, context);
	if (!sourceGraphic) {
	ASSERT(m_rendererFilterDataMap.contains(&renderer));
	filterData->savedContext = context;
	return false;
	}

	// Set the rendering mode from the page's settings.
	filterData->filter->setRenderingMode(renderingMode);

	GraphicsContext& sourceGraphicContext = sourceGraphic->context();

	filterData->sourceGraphicBuffer = WTFMove(sourceGraphic);
	filterData->savedContext = context;

	context = &sourceGraphicContext;

	ASSERT(m_rendererFilterDataMap.contains(&renderer));
	return true;
	}

	void RenderSVGResourceFilter::postApplyResource(RenderElement& renderer, GraphicsContext& context, OptionSet<RenderSVGResourceMode> resourceMode, const Path, const RenderSVGShape*)
	{
	ASSERT(context);
	ASSERT_UNUSED(resourceMode, !resourceMode);

	auto findResult = m_rendererFilterDataMap.find(&renderer);
	if (findResult == m_rendererFilterDataMap.end())
	return;

	FilterData& filterData = *findResult->value;

	LOG_WITH_STREAM(Filters, stream << "\nRenderSVGResourceFilter " << this << " postApplyResource - renderer " << &renderer << " filter state " << filterData.state);

	switch (filterData.state) {
	case FilterData::MarkedForRemoval:
	m_rendererFilterDataMap.remove(findResult);
	return;

	case FilterData::CycleDetected:
	case FilterData::Applying:
	// We have a cycle if we are already applying the data.
	// This can occur due to FeImage referencing a source that makes use of the FEImage itself.
	// This is the first place we've hit the cycle, so set the state back to PaintingSource so the return stack
	// will continue correctly.
	filterData.state = FilterData::PaintingSource;
	return;

	case FilterData::PaintingSource:
	if (!filterData.savedContext) {
	removeClientFromCache(renderer);
	return;
	}

	context = filterData.savedContext;
	filterData.savedContext = nullptr;
	break;

	case FilterData::Built:
	break;
	}

	auto lastEffect = filterData.filter->lastEffect();

	if (lastEffect && !filterData.boundaries.isEmpty() && !lastEffect->filterPrimitiveSubregion().isEmpty()) {
	// This is the real filtering of the object. It just needs to be called on the
	// initial filtering process. We just take the stored filter result on a
	// second drawing.
	if (filterData.state != FilterData::Built)
	filterData.filter->setSourceImage(WTFMove(filterData.sourceGraphicBuffer));

	// Always true if filterData is just built (filterData->state == FilterData::Built).
	if (!lastEffect->hasResult()) {
	filterData.state = FilterData::Applying;
	filterData.filter->apply();
	lastEffect->correctPremultipliedResultIfNeeded();
	lastEffect->transformResultColorSpace(DestinationColorSpace::SRGB());
	}
	filterData.state = FilterData::Built;

	if (auto result = lastEffect->filterImage()) {
	auto resultImage = result->imageBuffer();
	context->scale(FloatSize(1 / filterData.filter->filterScale().width(), 1 / filterData.filter->filterScale().height()));
	context->drawImageBuffer(*resultImage, result->absoluteImageRect());
	context->scale(filterData.filter->filterScale());
	}
	}
	filterData.sourceGraphicBuffer = nullptr;

	LOG_WITH_STREAM(Filters, stream << "RenderSVGResourceFilter " << this << " postApplyResource done\n");
	}

	FloatRect RenderSVGResourceFilter::resourceBoundingBox(const RenderObject& object)
	{
	return SVGLengthContext::resolveRectangle<SVGFilterElement>(&filterElement(), filterElement().filterUnits(), object.objectBoundingBox());
	}

	void RenderSVGResourceFilter::primitiveAttributeChanged(RenderObject* object, const QualifiedName& attribute)
	{
	SVGFilterPrimitiveStandardAttributes* primitve = static_cast<SVGFilterPrimitiveStandardAttributes*>(object->node());

	LOG(Filters, "RenderSVGResourceFilter %p primitiveAttributeChanged renderer %p", this, object);

	for (const auto& objectFilterDataPair : m_rendererFilterDataMap) {
	const auto& filterData = objectFilterDataPair.value;
	if (filterData->state != FilterData::Built)
	continue;

	SVGFilterBuilder* builder = filterData->builder.get();
	FilterEffect* effect = builder->effectByRenderer(object);
	if (!effect)
	continue;
	// Since all effects shares the same attribute value, all
	// or none of them will be changed.
	if (!primitve->setFilterEffectAttribute(effect, attribute))
	return;
	builder->clearResultsRecursive(effect);

	// Repaint the image on the screen.
	markClientForInvalidation(*objectFilterDataPair.key, RepaintInvalidation);
	}
	markAllClientLayersForInvalidation();
	}

	FloatRect RenderSVGResourceFilter::drawingRegion(RenderObject* object) const
	{
	FilterData* filterData = m_rendererFilterDataMap.get(object);
	return filterData ? filterData->drawingRegion : FloatRect();
	}

	TextStream& operator<<(TextStream& ts, FilterData::FilterDataState state)
	{
	switch (state) {
	case FilterData::PaintingSource:
	ts << "painting source";
	break;
	case FilterData::Applying:
	ts << "applying";
	break;
	case FilterData::Built:
	ts << "built";
	break;
	case FilterData::CycleDetected:
	ts << "cycle detected";
	break;
	case FilterData::MarkedForRemoval:
	ts << "marked for removal";
	break;
	}
	return ts;
	}

	} // namespace WebCore