| /* |
| Copyright (C) 2004, 2005, 2006, 2007, 2008 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., 51 Franklin Street, Fifth Floor, |
| Boston, MA 02110-1301, USA. |
| */ |
| |
| #include "config.h" |
| |
| #if ENABLE(SVG) |
| #include "SVGPatternElement.h" |
| |
| #include "Document.h" |
| #include "FloatConversion.h" |
| #include "GraphicsContext.h" |
| #include "ImageBuffer.h" |
| #include "MappedAttribute.h" |
| #include "PatternAttributes.h" |
| #include "RenderSVGContainer.h" |
| #include "SVGLength.h" |
| #include "SVGNames.h" |
| #include "SVGPaintServerPattern.h" |
| #include "SVGRenderSupport.h" |
| #include "SVGSVGElement.h" |
| #include "SVGStyledTransformableElement.h" |
| #include "SVGTransformList.h" |
| #include "SVGTransformable.h" |
| #include "SVGUnitTypes.h" |
| #include "TransformationMatrix.h" |
| #include <math.h> |
| #include <wtf/MathExtras.h> |
| #include <wtf/OwnPtr.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| SVGPatternElement::SVGPatternElement(const QualifiedName& tagName, Document* doc) |
| : SVGStyledElement(tagName, doc) |
| , SVGURIReference() |
| , SVGTests() |
| , SVGLangSpace() |
| , SVGExternalResourcesRequired() |
| , SVGFitToViewBox() |
| , m_x(this, SVGNames::xAttr, LengthModeWidth) |
| , m_y(this, SVGNames::yAttr, LengthModeHeight) |
| , m_width(this, SVGNames::widthAttr, LengthModeWidth) |
| , m_height(this, SVGNames::heightAttr, LengthModeHeight) |
| , m_patternUnits(this, SVGNames::patternUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| , m_patternContentUnits(this, SVGNames::patternContentUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) |
| , m_patternTransform(this, SVGNames::patternTransformAttr, SVGTransformList::create(SVGNames::patternTransformAttr)) |
| , m_href(this, XLinkNames::hrefAttr) |
| , m_externalResourcesRequired(this, SVGNames::externalResourcesRequiredAttr, false) |
| , m_viewBox(this, SVGNames::viewBoxAttr) |
| , m_preserveAspectRatio(this, SVGNames::preserveAspectRatioAttr, SVGPreserveAspectRatio::create()) |
| { |
| } |
| |
| SVGPatternElement::~SVGPatternElement() |
| { |
| } |
| |
| 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(LengthModeWidth, attr->value())); |
| else if (attr->name() == SVGNames::yAttr) |
| setYBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| else if (attr->name() == SVGNames::widthAttr) { |
| setWidthBaseValue(SVGLength(LengthModeWidth, attr->value())); |
| if (widthBaseValue().value(this) < 0.0) |
| document()->accessSVGExtensions()->reportError("A negative value for pattern attribute <width> is not allowed"); |
| } else if (attr->name() == SVGNames::heightAttr) { |
| setHeightBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| if (heightBaseValue().value(this) < 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(document(), attr)) |
| return; |
| |
| SVGStyledElement::parseMappedAttribute(attr); |
| } |
| } |
| |
| void SVGPatternElement::svgAttributeChanged(const QualifiedName& attrName) |
| { |
| SVGStyledElement::svgAttributeChanged(attrName); |
| |
| if (!m_resource) |
| return; |
| |
| if (attrName == SVGNames::patternUnitsAttr || attrName == SVGNames::patternContentUnitsAttr || |
| attrName == SVGNames::patternTransformAttr || attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || |
| attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr || |
| SVGURIReference::isKnownAttribute(attrName) || |
| SVGTests::isKnownAttribute(attrName) || |
| SVGLangSpace::isKnownAttribute(attrName) || |
| SVGExternalResourcesRequired::isKnownAttribute(attrName) || |
| SVGFitToViewBox::isKnownAttribute(attrName) || |
| SVGStyledElement::isKnownAttribute(attrName)) |
| m_resource->invalidate(); |
| } |
| |
| void SVGPatternElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) |
| { |
| SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); |
| |
| if (!m_resource) |
| return; |
| |
| m_resource->invalidate(); |
| } |
| |
| void SVGPatternElement::buildPattern(const FloatRect& targetRect) const |
| { |
| PatternAttributes attributes = collectPatternProperties(); |
| |
| // If we didn't find any pattern content, ignore the request. |
| if (!attributes.patternContentElement() || !renderer() || !renderer()->style()) |
| return; |
| |
| FloatRect patternBoundaries; |
| FloatRect patternContentBoundaries; |
| |
| // Determine specified pattern size |
| if (attributes.boundingBoxMode()) |
| patternBoundaries = FloatRect(attributes.x().valueAsPercentage() * targetRect.width(), |
| attributes.y().valueAsPercentage() * targetRect.height(), |
| attributes.width().valueAsPercentage() * targetRect.width(), |
| attributes.height().valueAsPercentage() * targetRect.height()); |
| else |
| patternBoundaries = FloatRect(attributes.x().value(this), |
| attributes.y().value(this), |
| attributes.width().value(this), |
| attributes.height().value(this)); |
| |
| // Clip pattern boundaries to target boundaries |
| if (patternBoundaries.width() > targetRect.width()) |
| patternBoundaries.setWidth(targetRect.width()); |
| |
| if (patternBoundaries.height() > targetRect.height()) |
| patternBoundaries.setHeight(targetRect.height()); |
| |
| IntSize patternSize(patternBoundaries.width(), patternBoundaries.height()); |
| clampImageBufferSizeToViewport(document()->view(), patternSize); |
| |
| if (patternSize.width() < static_cast<int>(patternBoundaries.width())) |
| patternBoundaries.setWidth(patternSize.width()); |
| |
| if (patternSize.height() < static_cast<int>(patternBoundaries.height())) |
| patternBoundaries.setHeight(patternSize.height()); |
| |
| // Eventually calculate the pattern content boundaries (only needed with overflow="visible"). |
| RenderStyle* style = renderer()->style(); |
| if (style->overflowX() == OVISIBLE && style->overflowY() == OVISIBLE) { |
| for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) { |
| if (!n->isSVGElement() || !static_cast<SVGElement*>(n)->isStyledTransformable() || !n->renderer()) |
| continue; |
| patternContentBoundaries.unite(n->renderer()->repaintRectInLocalCoordinates()); |
| } |
| } |
| |
| TransformationMatrix viewBoxCTM = viewBoxToViewTransform(viewBox(), preserveAspectRatio(), patternBoundaries.width(), patternBoundaries.height()); |
| FloatRect patternBoundariesIncludingOverflow = patternBoundaries; |
| |
| // Apply objectBoundingBoxMode fixup for patternContentUnits, if viewBox is not set. |
| if (!patternContentBoundaries.isEmpty()) { |
| if (!viewBoxCTM.isIdentity()) |
| patternContentBoundaries = viewBoxCTM.mapRect(patternContentBoundaries); |
| else if (attributes.boundingBoxModeContent()) |
| patternContentBoundaries = FloatRect(patternContentBoundaries.x() * targetRect.width(), |
| patternContentBoundaries.y() * targetRect.height(), |
| patternContentBoundaries.width() * targetRect.width(), |
| patternContentBoundaries.height() * targetRect.height()); |
| |
| patternBoundariesIncludingOverflow.unite(patternContentBoundaries); |
| } |
| |
| IntSize imageSize(lroundf(patternBoundariesIncludingOverflow.width()), lroundf(patternBoundariesIncludingOverflow.height())); |
| clampImageBufferSizeToViewport(document()->view(), imageSize); |
| |
| OwnPtr<ImageBuffer> patternImage = ImageBuffer::create(imageSize); |
| |
| if (!patternImage) |
| return; |
| |
| GraphicsContext* context = patternImage->context(); |
| ASSERT(context); |
| |
| context->save(); |
| |
| // Move to pattern start origin |
| if (patternBoundariesIncludingOverflow.location() != patternBoundaries.location()) { |
| context->translate(patternBoundaries.x() - patternBoundariesIncludingOverflow.x(), |
| patternBoundaries.y() - patternBoundariesIncludingOverflow.y()); |
| |
| patternBoundaries.setLocation(patternBoundariesIncludingOverflow.location()); |
| } |
| |
| // Process viewBox or boundingBoxModeContent correction |
| if (!viewBoxCTM.isIdentity()) |
| context->concatCTM(viewBoxCTM); |
| else if (attributes.boundingBoxModeContent()) { |
| context->translate(targetRect.x(), targetRect.y()); |
| context->scale(FloatSize(targetRect.width(), targetRect.height())); |
| } |
| |
| // Render subtree into ImageBuffer |
| for (Node* n = attributes.patternContentElement()->firstChild(); n; n = n->nextSibling()) { |
| if (!n->isSVGElement() || !static_cast<SVGElement*>(n)->isStyled() || !n->renderer()) |
| continue; |
| renderSubtreeToImage(patternImage.get(), n->renderer()); |
| } |
| |
| context->restore(); |
| |
| m_resource->setPatternTransform(attributes.patternTransform()); |
| m_resource->setPatternBoundaries(patternBoundaries); |
| m_resource->setTile(patternImage.release()); |
| } |
| |
| 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 = SVGPaintServerPattern::create(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()); |
| |
| if (!attributes.hasY() && current->hasAttribute(SVGNames::yAttr)) |
| attributes.setY(current->y()); |
| |
| if (!attributes.hasWidth() && current->hasAttribute(SVGNames::widthAttr)) |
| attributes.setWidth(current->width()); |
| |
| if (!attributes.hasHeight() && current->hasAttribute(SVGNames::heightAttr)) |
| attributes.setHeight(current->height()); |
| |
| if (!attributes.hasBoundingBoxMode() && current->hasAttribute(SVGNames::patternUnitsAttr)) |
| attributes.setBoundingBoxMode(current->patternUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX); |
| |
| if (!attributes.hasBoundingBoxModeContent() && current->hasAttribute(SVGNames::patternContentUnitsAttr)) |
| attributes.setBoundingBoxModeContent(current->patternContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_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) |
