| /* |
| Copyright (C) 2004, 2005, 2006, 2008 Nikolas Zimmermann <zimmermann@kde.org> |
| 2004, 2005, 2006, 2007 Rob Buis <buis@kde.org> |
| 2005 Alexander Kellett <lypanov@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 "SVGMaskElement.h" |
| |
| #include "CSSStyleSelector.h" |
| #include "GraphicsContext.h" |
| #include "ImageBuffer.h" |
| #include "MappedAttribute.h" |
| #include "RenderSVGContainer.h" |
| #include "SVGLength.h" |
| #include "SVGNames.h" |
| #include "SVGRenderSupport.h" |
| #include "SVGUnitTypes.h" |
| #include <math.h> |
| #include <wtf/MathExtras.h> |
| #include <wtf/OwnPtr.h> |
| |
| using namespace std; |
| |
| namespace WebCore { |
| |
| SVGMaskElement::SVGMaskElement(const QualifiedName& tagName, Document* doc) |
| : SVGStyledLocatableElement(tagName, doc) |
| , SVGURIReference() |
| , SVGTests() |
| , SVGLangSpace() |
| , SVGExternalResourcesRequired() |
| , m_maskUnits(this, SVGNames::maskUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| , m_maskContentUnits(this, SVGNames::maskContentUnitsAttr, SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE) |
| , m_x(this, SVGNames::xAttr, LengthModeWidth, "-10%") |
| , m_y(this, SVGNames::yAttr, LengthModeHeight, "-10%") |
| , m_width(this, SVGNames::widthAttr, LengthModeWidth, "120%") |
| , m_height(this, SVGNames::heightAttr, LengthModeHeight, "120%") |
| , m_href(this, XLinkNames::hrefAttr) |
| , m_externalResourcesRequired(this, SVGNames::externalResourcesRequiredAttr, false) |
| { |
| // Spec: If the x/y attribute is not specified, the effect is as if a value of "-10%" were specified. |
| // Spec: If the width/height attribute is not specified, the effect is as if a value of "120%" were specified. |
| } |
| |
| SVGMaskElement::~SVGMaskElement() |
| { |
| } |
| |
| void SVGMaskElement::parseMappedAttribute(MappedAttribute* attr) |
| { |
| if (attr->name() == SVGNames::maskUnitsAttr) { |
| if (attr->value() == "userSpaceOnUse") |
| setMaskUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE); |
| else if (attr->value() == "objectBoundingBox") |
| setMaskUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX); |
| } else if (attr->name() == SVGNames::maskContentUnitsAttr) { |
| if (attr->value() == "userSpaceOnUse") |
| setMaskContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_USERSPACEONUSE); |
| else if (attr->value() == "objectBoundingBox") |
| setMaskContentUnitsBaseValue(SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX); |
| } 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())); |
| else if (attr->name() == SVGNames::heightAttr) |
| setHeightBaseValue(SVGLength(LengthModeHeight, attr->value())); |
| else { |
| if (SVGURIReference::parseMappedAttribute(attr)) |
| return; |
| if (SVGTests::parseMappedAttribute(attr)) |
| return; |
| if (SVGLangSpace::parseMappedAttribute(attr)) |
| return; |
| if (SVGExternalResourcesRequired::parseMappedAttribute(attr)) |
| return; |
| SVGStyledElement::parseMappedAttribute(attr); |
| } |
| } |
| |
| void SVGMaskElement::svgAttributeChanged(const QualifiedName& attrName) |
| { |
| SVGStyledElement::svgAttributeChanged(attrName); |
| |
| if (!m_masker) |
| return; |
| |
| if (attrName == SVGNames::maskUnitsAttr || attrName == SVGNames::maskContentUnitsAttr || |
| attrName == SVGNames::xAttr || attrName == SVGNames::yAttr || |
| attrName == SVGNames::widthAttr || attrName == SVGNames::heightAttr || |
| SVGURIReference::isKnownAttribute(attrName) || |
| SVGTests::isKnownAttribute(attrName) || |
| SVGLangSpace::isKnownAttribute(attrName) || |
| SVGExternalResourcesRequired::isKnownAttribute(attrName) || |
| SVGStyledElement::isKnownAttribute(attrName)) |
| m_masker->invalidate(); |
| } |
| |
| void SVGMaskElement::childrenChanged(bool changedByParser, Node* beforeChange, Node* afterChange, int childCountDelta) |
| { |
| SVGStyledElement::childrenChanged(changedByParser, beforeChange, afterChange, childCountDelta); |
| |
| if (!m_masker) |
| return; |
| |
| m_masker->invalidate(); |
| } |
| |
| PassOwnPtr<ImageBuffer> SVGMaskElement::drawMaskerContent(const FloatRect& targetRect, FloatRect& maskDestRect) const |
| { |
| // Determine specified mask size |
| if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| maskDestRect = FloatRect(x().valueAsPercentage() * targetRect.width(), |
| y().valueAsPercentage() * targetRect.height(), |
| width().valueAsPercentage() * targetRect.width(), |
| height().valueAsPercentage() * targetRect.height()); |
| else |
| maskDestRect = FloatRect(x().value(this), |
| y().value(this), |
| width().value(this), |
| height().value(this)); |
| |
| IntSize imageSize(lroundf(maskDestRect.width()), lroundf(maskDestRect.height())); |
| clampImageBufferSizeToViewport(document()->view(), imageSize); |
| |
| if (imageSize.width() < static_cast<int>(maskDestRect.width())) |
| maskDestRect.setWidth(imageSize.width()); |
| |
| if (imageSize.height() < static_cast<int>(maskDestRect.height())) |
| maskDestRect.setHeight(imageSize.height()); |
| |
| // FIXME: This changes color space to linearRGB, the default color space |
| // for masking operations in SVG. We need a switch for the other color-space |
| // attribute values sRGB, inherit and auto. |
| OwnPtr<ImageBuffer> maskImage = ImageBuffer::create(imageSize, LinearRGB); |
| if (!maskImage) |
| return 0; |
| |
| FloatPoint maskContextLocation = maskDestRect.location(); |
| if (maskUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| maskDestRect.move(targetRect.x(), targetRect.y()); |
| |
| if (maskContentUnits() != SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| maskContextLocation.move(targetRect.x(), targetRect.y()); |
| |
| GraphicsContext* maskImageContext = maskImage->context(); |
| ASSERT(maskImageContext); |
| |
| maskImageContext->save(); |
| maskImageContext->translate(-maskContextLocation.x(), -maskContextLocation.y()); |
| |
| if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) { |
| maskImageContext->save(); |
| maskImageContext->scale(FloatSize(targetRect.width(), targetRect.height())); |
| } |
| |
| // Render subtree into ImageBuffer |
| for (Node* n = firstChild(); n; n = n->nextSibling()) { |
| SVGElement* elem = 0; |
| if (n->isSVGElement()) |
| elem = static_cast<SVGElement*>(n); |
| if (!elem || !elem->isStyled()) |
| continue; |
| |
| SVGStyledElement* e = static_cast<SVGStyledElement*>(elem); |
| RenderObject* item = e->renderer(); |
| if (!item) |
| continue; |
| |
| renderSubtreeToImage(maskImage.get(), item); |
| } |
| |
| if (maskContentUnits() == SVGUnitTypes::SVG_UNIT_TYPE_OBJECTBOUNDINGBOX) |
| maskImageContext->restore(); |
| |
| maskImageContext->restore(); |
| return maskImage.release(); |
| } |
| |
| RenderObject* SVGMaskElement::createRenderer(RenderArena* arena, RenderStyle*) |
| { |
| RenderSVGContainer* maskContainer = new (arena) RenderSVGContainer(this); |
| maskContainer->setDrawsContents(false); |
| return maskContainer; |
| } |
| |
| SVGResource* SVGMaskElement::canvasResource() |
| { |
| if (!m_masker) |
| m_masker = SVGResourceMasker::create(this); |
| return m_masker.get(); |
| } |
| |
| } |
| |
| #endif // ENABLE(SVG) |
