WebCore/ksvg2/svg/SVGPatternElement.cpp - WebKit - Git at Google

 /*
     Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
                   2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>

     This file is part of the KDE project

     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., 59 Temple Place - Suite 330,
     Boston, MA 02111-1307, USA.
 */

 #include "config.h"

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

 #include "AffineTransform.h"
 #include "Document.h"
 #include "FloatConversion.h"
 #include "GraphicsContext.h"
 #include "ImageBuffer.h"
 #include "PatternAttributes.h"
 #include "RenderSVGContainer.h"
 #include "SVGLength.h"
 #include "SVGNames.h"
 #include "SVGPaintServerPattern.h"
 #include "SVGSVGElement.h"
 #include "SVGTransformList.h"
 #include "SVGTransformable.h"
 #include "SVGUnitTypes.h"

 #include <math.h>
 #include <wtf/OwnPtr.h>
 #include <wtf/MathExtras.h>

 using namespace std;

 namespace WebCore {

 SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* doc)
     : SVGStyledElement(tagName, doc)
     , SVGURIReference()
     , SVGTests()
     , SVGLangSpace()
     , SVGExternalResourcesRequired()
     , SVGFitToViewBox()
     , m_x(this, LengthModeWidth)
     , m_y(this, LengthModeHeight)
     , m_width(this, LengthModeWidth)
     , m_height(this, LengthModeHeight)
     , m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
     , m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
     , m_patternTransform(new SVGTransformList)
 {
 }

 SVGPatternElement::~SVGPatternElement()
 {
 }

 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, int, Enumeration, enumeration, PatternUnits, patternUnits, SVGNames::patternUnitsAttr.localName(), m_patternUnits)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, int, Enumeration, enumeration, PatternContentUnits, patternContentUnits, SVGNames::patternContentUnitsAttr.localName(), m_patternContentUnits)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, X, x, SVGNames::xAttr.localName(), m_x)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Y, y, SVGNames::yAttr.localName(), m_y)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Width, width, SVGNames::widthAttr.localName(), m_width)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Height, height, SVGNames::heightAttr.localName(), m_height)
 ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGTransformList*, TransformList, transformList, PatternTransform, patternTransform, SVGNames::patternTransformAttr.localName(), m_patternTransform.get())

 void SVGPatternElement::parseMappedAttribute(MappedAttribute* attr)
 {
     if (attr->name() == SVGNames::patternUnitsAttr) {
         if (attr->value() == "userSpaceOnUse")
             setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
         else if (attr->value() == "objectBoundingBox")
             setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
     } else if (attr->name() == SVGNames::patternContentUnitsAttr) {
         if (attr->value() == "userSpaceOnUse")
             setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
         else if (attr->value() == "objectBoundingBox")
             setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
     } else if (attr->name() == SVGNames::patternTransformAttr) {
         SVGTransformList* patternTransforms = patternTransformBaseValue();
         if (!SVGTransformable::parseTransformAttribute(patternTransforms, attr->value())) {
             ExceptionCode ec = 0;
             patternTransforms->clear(ec);
         }
     } else if (attr->name() == SVGNames::xAttr)
         setXBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
     else if (attr->name() == SVGNames::yAttr)
         setYBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
     else if (attr->name() == SVGNames::widthAttr) {
         setWidthBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
         if (width().value() < 0.0)
             document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed");
     } else if (attr->name() == SVGNames::heightAttr) {
         setHeightBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
         if (width().value() < 0.0)
             document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <height> is not allowed");
     } else {
         if (SVGURIReference::parseMappedAttribute(attr))
             return;
         if (SVGTests::parseMappedAttribute(attr))
             return;
         if (SVGLangSpace::parseMappedAttribute(attr))
             return;
         if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
             return;
         if (SVGFitToViewBox::parseMappedAttribute(attr))
             return;

         SVGStyledElement::parseMappedAttribute(attr);
     }
 }

 void SVGPatternElement::buildPattern(const FloatRect& targetRect) const
 {
     PatternAttributes attributes = collectPatternProperties();

     // If we didn't find any pattern content, ignore the request.
     if (!attributes.patternContentElement())
         return;

     // Determine specified pattern size
     float xValue = narrowPrecisionToFloat(attributes.x());
     float yValue = narrowPrecisionToFloat(attributes.y());
     float widthValue = narrowPrecisionToFloat(attributes.width());
     float heightValue = narrowPrecisionToFloat(attributes.height());

     if (attributes.boundingBoxMode()) {
         xValue *= targetRect.width();
         yValue *= targetRect.height();
         widthValue *= targetRect.width();
         heightValue *= targetRect.height();
     }

     // As we're allocating buffers here, clip the buffer size to the target object size as upper boundary
     if (widthValue > targetRect.width())
         widthValue = targetRect.width();

     if (heightValue > targetRect.height())
         heightValue = targetRect.height();

     auto_ptr<ImageBuffer> patternImage = ImageBuffer::create(IntSize(lroundf(widthValue), lroundf(heightValue)), false);
     if (!patternImage.get())
         return;

     GraphicsContext* context = patternImage->context();
     ASSERT(context);

     if (attributes.boundingBoxModeContent()) {
         context->save();
         context->scale(FloatSize(targetRect.width(), targetRect.height()));
     }

     // Render subtree into ImageBuffer
     for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) {
         SVGElement* elem = svg_dynamic_cast(n);
         if (!elem || !elem->isStyled())
             continue;

         SVGStyledElement* e = static_cast<SVGStyledElement*>(elem);
         RenderObject* item = e->renderer();
         if (!item)
             continue;

         ImageBuffer::renderSubtreeToImage(patternImage.get(), item);
     }

     if (attributes.boundingBoxModeContent())
         context->restore();

     m_resource->setPatternTransform(attributes.patternTransform());
     m_resource->setPatternBoundaries(FloatRect(xValue, yValue, widthValue, heightValue));
     m_resource->setTile(patternImage);
 }

 void SVGPatternElement::notifyAttributeChange() const
 {
     if (!m_resource || !attached() || ownerDocument()->parsing())
         return;

     m_resource->invalidate();
     m_resource->repaintClients();
 }

 RenderObject* SVGPatternElement::createRenderer(RenderArena* arena, RenderStyle*)
 {
     RenderSVGContainer* patternContainer = new (arena) RenderSVGContainer(this);
     patternContainer->setDrawsContents(false);
     return patternContainer;
 }

 SVGResource* SVGPatternElement::canvasResource()
 {
     if (!m_resource)
         m_resource = new SVGPaintServerPattern(this);

     return m_resource.get();
 }

 PatternAttributes SVGPatternElement::collectPatternProperties() const
 {
     PatternAttributes attributes;
     HashSet<const SVGPatternElement*> processedPatterns;

     const SVGPatternElement* current = this;
     while (current) {
         if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))
             attributes.setX(current->x().valueAsPercentage());

         if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))
             attributes.setY(current->y().valueAsPercentage());

         if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))
             attributes.setWidth(current->width().valueAsPercentage());

         if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))
             attributes.setHeight(current->height().valueAsPercentage());

         if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr))
             attributes.setBoundingBoxMode(current->getAttribute(SVGNames::patternUnitsAttr) == "objectBoundingBox");

         if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr))
             attributes.setBoundingBoxModeContent(current->getAttribute(SVGNames::patternContentUnitsAttr) == "objectBoundingBox");

         if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr))
             attributes.setPatternTransform(current->patternTransform()->consolidate().matrix());

         if (!attributes.hasPatternContentElement() && current->hasChildNodes())
             attributes.setPatternContentElement(current);

         processedPatterns.add(current);

         // Respect xlink:href, take attributes from referenced element
         Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
         if (refNode && refNode->hasTagName(SVGNames::patternTag)) {
             current = static_cast<const SVGPatternElement*>(const_cast<const Node*>(refNode));

             // Cycle detection
             if (processedPatterns.contains(current))
                 return PatternAttributes();
         } else
             current = 0;
     }

     return attributes;
 }

 }

 #endif // ENABLE(SVG)

 // vim:ts=4:noet
	/*
	Copyright (C) 2004, 2005, 2006 Nikolas Zimmermann <zimmermann@kde.org>
	2004, 2005, 2006, 2007 Rob Buis <buis@kde.org>

	This file is part of the KDE project

	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., 59 Temple Place - Suite 330,
	Boston, MA 02111-1307, USA.
	*/

	#include "config.h"

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

	#include "AffineTransform.h"
	#include "Document.h"
	#include "FloatConversion.h"
	#include "GraphicsContext.h"
	#include "ImageBuffer.h"
	#include "PatternAttributes.h"
	#include "RenderSVGContainer.h"
	#include "SVGLength.h"
	#include "SVGNames.h"
	#include "SVGPaintServerPattern.h"
	#include "SVGSVGElement.h"
	#include "SVGTransformList.h"
	#include "SVGTransformable.h"
	#include "SVGUnitTypes.h"

	#include <math.h>
	#include <wtf/OwnPtr.h>
	#include <wtf/MathExtras.h>

	using namespace std;

	namespace WebCore {

	SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* doc)
	: SVGStyledElement(tagName, doc)
	, SVGURIReference()
	, SVGTests()
	, SVGLangSpace()
	, SVGExternalResourcesRequired()
	, SVGFitToViewBox()
	, m_x(this, LengthModeWidth)
	, m_y(this, LengthModeHeight)
	, m_width(this, LengthModeWidth)
	, m_height(this, LengthModeHeight)
	, m_patternUnits(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX)
	, m_patternContentUnits(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE)
	, m_patternTransform(new SVGTransformList)
	{
	}

	SVGPatternElement::~SVGPatternElement()
	{
	}

	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, int, Enumeration, enumeration, PatternUnits, patternUnits, SVGNames::patternUnitsAttr.localName(), m_patternUnits)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, int, Enumeration, enumeration, PatternContentUnits, patternContentUnits, SVGNames::patternContentUnitsAttr.localName(), m_patternContentUnits)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, X, x, SVGNames::xAttr.localName(), m_x)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Y, y, SVGNames::yAttr.localName(), m_y)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Width, width, SVGNames::widthAttr.localName(), m_width)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGLength, Length, length, Height, height, SVGNames::heightAttr.localName(), m_height)
	ANIMATED_PROPERTY_DEFINITIONS(SVGPatternElement, SVGTransformList*, TransformList, transformList, PatternTransform, patternTransform, SVGNames::patternTransformAttr.localName(), m_patternTransform.get())

	void SVGPatternElement::parseMappedAttribute(MappedAttribute* attr)
	{
	if (attr->name() == SVGNames::patternUnitsAttr) {
	if (attr->value() == "userSpaceOnUse")
	setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
	else if (attr->value() == "objectBoundingBox")
	setPatternUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
	} else if (attr->name() == SVGNames::patternContentUnitsAttr) {
	if (attr->value() == "userSpaceOnUse")
	setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE);
	else if (attr->value() == "objectBoundingBox")
	setPatternContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX);
	} else if (attr->name() == SVGNames::patternTransformAttr) {
	SVGTransformList* patternTransforms = patternTransformBaseValue();
	if (!SVGTransformable::parseTransformAttribute(patternTransforms, attr->value())) {
	ExceptionCode ec = 0;
	patternTransforms->clear(ec);
	}
	} else if (attr->name() == SVGNames::xAttr)
	setXBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
	else if (attr->name() == SVGNames::yAttr)
	setYBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
	else if (attr->name() == SVGNames::widthAttr) {
	setWidthBaseValue(SVGLength(this, LengthModeWidth, attr->value()));
	if (width().value() < 0.0)
	document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed");
	} else if (attr->name() == SVGNames::heightAttr) {
	setHeightBaseValue(SVGLength(this, LengthModeHeight, attr->value()));
	if (width().value() < 0.0)
	document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <height> is not allowed");
	} else {
	if (SVGURIReference::parseMappedAttribute(attr))
	return;
	if (SVGTests::parseMappedAttribute(attr))
	return;
	if (SVGLangSpace::parseMappedAttribute(attr))
	return;
	if (SVGExternalResourcesRequired::parseMappedAttribute(attr))
	return;
	if (SVGFitToViewBox::parseMappedAttribute(attr))
	return;

	SVGStyledElement::parseMappedAttribute(attr);
	}
	}

	void SVGPatternElement::buildPattern(const FloatRect& targetRect) const
	{
	PatternAttributes attributes = collectPatternProperties();

	// If we didn't find any pattern content, ignore the request.
	if (!attributes.patternContentElement())
	return;

	// Determine specified pattern size
	float xValue = narrowPrecisionToFloat(attributes.x());
	float yValue = narrowPrecisionToFloat(attributes.y());
	float widthValue = narrowPrecisionToFloat(attributes.width());
	float heightValue = narrowPrecisionToFloat(attributes.height());

	if (attributes.boundingBoxMode()) {
	xValue *= targetRect.width();
	yValue *= targetRect.height();
	widthValue *= targetRect.width();
	heightValue *= targetRect.height();
	}

	// As we're allocating buffers here, clip the buffer size to the target object size as upper boundary
	if (widthValue > targetRect.width())
	widthValue = targetRect.width();

	if (heightValue > targetRect.height())
	heightValue = targetRect.height();

	auto_ptr<ImageBuffer> patternImage = ImageBuffer::create(IntSize(lroundf(widthValue), lroundf(heightValue)), false);
	if (!patternImage.get())
	return;

	GraphicsContext* context = patternImage->context();
	ASSERT(context);

	if (attributes.boundingBoxModeContent()) {
	context->save();
	context->scale(FloatSize(targetRect.width(), targetRect.height()));
	}

	// Render subtree into ImageBuffer
	for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) {
	SVGElement* elem = svg_dynamic_cast(n);
	if (!elem \|\| !elem->isStyled())
	continue;

	SVGStyledElement* e = static_cast<SVGStyledElement*>(elem);
	RenderObject* item = e->renderer();
	if (!item)
	continue;

	ImageBuffer::renderSubtreeToImage(patternImage.get(), item);
	}

	if (attributes.boundingBoxModeContent())
	context->restore();

	m_resource->setPatternTransform(attributes.patternTransform());
	m_resource->setPatternBoundaries(FloatRect(xValue, yValue, widthValue, heightValue));
	m_resource->setTile(patternImage);
	}

	void SVGPatternElement::notifyAttributeChange() const
	{
	if (!m_resource \|\| !attached() \|\| ownerDocument()->parsing())
	return;

	m_resource->invalidate();
	m_resource->repaintClients();
	}

	RenderObject* SVGPatternElement::createRenderer(RenderArena* arena, RenderStyle*)
	{
	RenderSVGContainer* patternContainer = new (arena) RenderSVGContainer(this);
	patternContainer->setDrawsContents(false);
	return patternContainer;
	}

	SVGResource* SVGPatternElement::canvasResource()
	{
	if (!m_resource)
	m_resource = new SVGPaintServerPattern(this);

	return m_resource.get();
	}

	PatternAttributes SVGPatternElement::collectPatternProperties() const
	{
	PatternAttributes attributes;
	HashSet<const SVGPatternElement*> processedPatterns;

	const SVGPatternElement* current = this;
	while (current) {
	if (!attributes.hasX() && current->hasAttribute(SVGNames::xAttr))
	attributes.setX(current->x().valueAsPercentage());

	if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr))
	attributes.setY(current->y().valueAsPercentage());

	if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr))
	attributes.setWidth(current->width().valueAsPercentage());

	if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr))
	attributes.setHeight(current->height().valueAsPercentage());

	if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr))
	attributes.setBoundingBoxMode(current->getAttribute(SVGNames::patternUnitsAttr) == "objectBoundingBox");

	if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr))
	attributes.setBoundingBoxModeContent(current->getAttribute(SVGNames::patternContentUnitsAttr) == "objectBoundingBox");

	if (!attributes.hasPatternTransform() && current->hasAttribute(SVGNames::patternTransformAttr))
	attributes.setPatternTransform(current->patternTransform()->consolidate().matrix());

	if (!attributes.hasPatternContentElement() && current->hasChildNodes())
	attributes.setPatternContentElement(current);

	processedPatterns.add(current);

	// Respect xlink:href, take attributes from referenced element
	Node* refNode = ownerDocument()->getElementById(SVGURIReference::getTarget(current->href()));
	if (refNode && refNode->hasTagName(SVGNames::patternTag)) {
	current = static_cast<const SVGPatternElement>(const_cast<const Node>(refNode));

	// Cycle detection
	if (processedPatterns.contains(current))
	return PatternAttributes();
	} else
	current = 0;
	}

	return attributes;
	}

	}

	#endif // ENABLE(SVG)

	// vim:ts=4:noet