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Diffstat (limited to 'svgio/source/svgreader/svgmasknode.cxx')
| -rw-r--r-- | svgio/source/svgreader/svgmasknode.cxx | 316 |
1 files changed, 316 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgmasknode.cxx b/svgio/source/svgreader/svgmasknode.cxx new file mode 100644 index 000000000..6b2bc2b17 --- /dev/null +++ b/svgio/source/svgreader/svgmasknode.cxx @@ -0,0 +1,316 @@ +/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */ +/* + * This file is part of the LibreOffice project. + * + * This Source Code Form is subject to the terms of the Mozilla Public + * License, v. 2.0. If a copy of the MPL was not distributed with this + * file, You can obtain one at http://mozilla.org/MPL/2.0/. + * + * This file incorporates work covered by the following license notice: + * + * Licensed to the Apache Software Foundation (ASF) under one or more + * contributor license agreements. See the NOTICE file distributed + * with this work for additional information regarding copyright + * ownership. The ASF licenses this file to you under the Apache + * License, Version 2.0 (the "License"); you may not use this file + * except in compliance with the License. You may obtain a copy of + * the License at http://www.apache.org/licenses/LICENSE-2.0 . + */ + +#include <svgmasknode.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <drawinglayer/primitive2d/transparenceprimitive2d.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include <drawinglayer/geometry/viewinformation2d.hxx> +#include <drawinglayer/primitive2d/modifiedcolorprimitive2d.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <basegfx/polygon/b2dpolygon.hxx> + +namespace svgio::svgreader +{ + SvgMaskNode::SvgMaskNode( + SvgDocument& rDocument, + SvgNode* pParent) + : SvgNode(SVGToken::Mask, rDocument, pParent), + maSvgStyleAttributes(*this), + maX(SvgNumber(-10.0, SvgUnit::percent, true)), + maY(SvgNumber(-10.0, SvgUnit::percent, true)), + maWidth(SvgNumber(120.0, SvgUnit::percent, true)), + maHeight(SvgNumber(120.0, SvgUnit::percent, true)), + maMaskUnits(SvgUnits::objectBoundingBox), + maMaskContentUnits(SvgUnits::userSpaceOnUse) + { + } + + SvgMaskNode::~SvgMaskNode() + { + } + + const SvgStyleAttributes* SvgMaskNode::getSvgStyleAttributes() const + { + return &maSvgStyleAttributes; + } + + void SvgMaskNode::parseAttribute(const OUString& rTokenName, SVGToken aSVGToken, const OUString& aContent) + { + // call parent + SvgNode::parseAttribute(rTokenName, aSVGToken, aContent); + + // read style attributes + maSvgStyleAttributes.parseStyleAttribute(aSVGToken, aContent, false); + + // parse own + switch(aSVGToken) + { + case SVGToken::Style: + { + readLocalCssStyle(aContent); + break; + } + case SVGToken::X: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + maX = aNum; + } + break; + } + case SVGToken::Y: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + maY = aNum; + } + break; + } + case SVGToken::Width: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + if(aNum.isPositive()) + { + maWidth = aNum; + } + } + break; + } + case SVGToken::Height: + { + SvgNumber aNum; + + if(readSingleNumber(aContent, aNum)) + { + if(aNum.isPositive()) + { + maHeight = aNum; + } + } + break; + } + case SVGToken::Transform: + { + const basegfx::B2DHomMatrix aMatrix(readTransform(aContent, *this)); + + if(!aMatrix.isIdentity()) + { + setTransform(aMatrix); + } + break; + } + case SVGToken::MaskUnits: + { + if(!aContent.isEmpty()) + { + if(aContent.match(commonStrings::aStrUserSpaceOnUse)) + { + setMaskUnits(SvgUnits::userSpaceOnUse); + } + else if(aContent.match(commonStrings::aStrObjectBoundingBox)) + { + setMaskUnits(SvgUnits::objectBoundingBox); + } + } + break; + } + case SVGToken::MaskContentUnits: + { + if(!aContent.isEmpty()) + { + if(aContent.match(commonStrings::aStrUserSpaceOnUse)) + { + setMaskContentUnits(SvgUnits::userSpaceOnUse); + } + else if(aContent.match(commonStrings::aStrObjectBoundingBox)) + { + setMaskContentUnits(SvgUnits::objectBoundingBox); + } + } + break; + } + default: + { + break; + } + } + } + + void SvgMaskNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DContainer& rTarget, bool bReferenced) const + { + drawinglayer::primitive2d::Primitive2DContainer aNewTarget; + + // decompose children + SvgNode::decomposeSvgNode(aNewTarget, bReferenced); + + if(aNewTarget.empty()) + return; + + if(getTransform()) + { + // create embedding group element with transformation + drawinglayer::primitive2d::Primitive2DReference xRef( + new drawinglayer::primitive2d::TransformPrimitive2D( + *getTransform(), + std::move(aNewTarget))); + + aNewTarget = drawinglayer::primitive2d::Primitive2DContainer { xRef }; + } + + // append to current target + rTarget.append(aNewTarget); + } + + void SvgMaskNode::apply( + drawinglayer::primitive2d::Primitive2DContainer& rTarget, + const std::optional<basegfx::B2DHomMatrix>& pTransform) const + { + if(rTarget.empty() || Display::None == getDisplay()) + return; + + drawinglayer::primitive2d::Primitive2DContainer aMaskTarget; + + // get mask definition as primitives + decomposeSvgNode(aMaskTarget, true); + + if(!aMaskTarget.empty()) + { + // get range of content to be masked + const basegfx::B2DRange aContentRange( + rTarget.getB2DRange( + drawinglayer::geometry::ViewInformation2D())); + const double fContentWidth(aContentRange.getWidth()); + const double fContentHeight(aContentRange.getHeight()); + + if(fContentWidth > 0.0 && fContentHeight > 0.0) + { + // create OffscreenBufferRange + basegfx::B2DRange aOffscreenBufferRange; + + if (SvgUnits::objectBoundingBox == maMaskUnits) + { + // fractions or percentages of the bounding box of the element to which the mask is applied + const double fX(SvgUnit::percent == getX().getUnit() ? getX().getNumber() * 0.01 : getX().getNumber()); + const double fY(SvgUnit::percent == getY().getUnit() ? getY().getNumber() * 0.01 : getY().getNumber()); + const double fW(SvgUnit::percent == getWidth().getUnit() ? getWidth().getNumber() * 0.01 : getWidth().getNumber()); + const double fH(SvgUnit::percent == getHeight().getUnit() ? getHeight().getNumber() * 0.01 : getHeight().getNumber()); + + aOffscreenBufferRange = basegfx::B2DRange( + aContentRange.getMinX() + (fX * fContentWidth), + aContentRange.getMinY() + (fY * fContentHeight), + aContentRange.getMinX() + ((fX + fW) * fContentWidth), + aContentRange.getMinY() + ((fY + fH) * fContentHeight)); + } + else + { + const double fX(getX().isSet() ? getX().solve(*this, NumberType::xcoordinate) : 0.0); + const double fY(getY().isSet() ? getY().solve(*this, NumberType::ycoordinate) : 0.0); + + aOffscreenBufferRange = basegfx::B2DRange( + fX, + fY, + fX + (getWidth().isSet() ? getWidth().solve(*this, NumberType::xcoordinate) : 0.0), + fY + (getHeight().isSet() ? getHeight().solve(*this, NumberType::ycoordinate) : 0.0)); + } + + if (SvgUnits::objectBoundingBox == maMaskContentUnits) + { + // mask is object-relative, embed in content transformation + drawinglayer::primitive2d::Primitive2DReference xTransform( + new drawinglayer::primitive2d::TransformPrimitive2D( + basegfx::utils::createScaleTranslateB2DHomMatrix( + aContentRange.getRange(), + aContentRange.getMinimum()), + std::move(aMaskTarget))); + + aMaskTarget = drawinglayer::primitive2d::Primitive2DContainer { xTransform }; + } + else // userSpaceOnUse + { + // #i124852# + if(pTransform) + { + drawinglayer::primitive2d::Primitive2DReference xTransform( + new drawinglayer::primitive2d::TransformPrimitive2D( + *pTransform, + std::move(aMaskTarget))); + + aMaskTarget = drawinglayer::primitive2d::Primitive2DContainer { xTransform }; + } + } + + // embed content to a ModifiedColorPrimitive2D since the definitions + // how content is used as alpha is special for Svg + { + drawinglayer::primitive2d::Primitive2DReference xInverseMask( + new drawinglayer::primitive2d::ModifiedColorPrimitive2D( + std::move(aMaskTarget), + std::make_shared<basegfx::BColorModifier_luminance_to_alpha>())); + + aMaskTarget = drawinglayer::primitive2d::Primitive2DContainer { xInverseMask }; + } + + // prepare new content + drawinglayer::primitive2d::Primitive2DReference xNewContent( + new drawinglayer::primitive2d::TransparencePrimitive2D( + std::move(rTarget), + std::move(aMaskTarget))); + + // output up to now is defined by aContentRange and mask is oriented + // relative to it. It is possible that aOffscreenBufferRange defines + // a smaller area. In that case, embed to a mask primitive + if(!aOffscreenBufferRange.isInside(aContentRange)) + { + xNewContent = new drawinglayer::primitive2d::MaskPrimitive2D( + basegfx::B2DPolyPolygon( + basegfx::utils::createPolygonFromRect( + aOffscreenBufferRange)), + drawinglayer::primitive2d::Primitive2DContainer { xNewContent }); + } + + // redefine target. Use TransparencePrimitive2D with created mask + // geometry + rTarget = drawinglayer::primitive2d::Primitive2DContainer { xNewContent }; + } + else + { + // content is geometrically empty + rTarget.clear(); + } + } + else + { + // An empty clipping path will completely clip away the element that had + // the clip-path property applied. (Svg spec) + rTarget.clear(); + } + } + +} // end of namespace svgio::svgreader + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |