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Diffstat (limited to 'svgio/source/svgreader/svgclippathnode.cxx')
| -rw-r--r-- | svgio/source/svgreader/svgclippathnode.cxx | 203 |
1 files changed, 203 insertions, 0 deletions
diff --git a/svgio/source/svgreader/svgclippathnode.cxx b/svgio/source/svgreader/svgclippathnode.cxx new file mode 100644 index 000000000000..5c271400d5f0 --- /dev/null +++ b/svgio/source/svgreader/svgclippathnode.cxx @@ -0,0 +1,203 @@ +/* -*- 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 <svgio/svgreader/svgclippathnode.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include <drawinglayer/geometry/viewinformation2d.hxx> +#include <drawinglayer/processor2d/contourextractor2d.hxx> +#include <basegfx/polygon/b2dpolypolygoncutter.hxx> + +////////////////////////////////////////////////////////////////////////////// + +namespace svgio +{ + namespace svgreader + { + SvgClipPathNode::SvgClipPathNode( + SvgDocument& rDocument, + SvgNode* pParent) + : SvgNode(SVGTokenClipPathNode, rDocument, pParent), + maSvgStyleAttributes(*this), + mpaTransform(0), + maClipPathUnits(userSpaceOnUse) + { + } + + SvgClipPathNode::~SvgClipPathNode() + { + if(mpaTransform) delete mpaTransform; + } + + const SvgStyleAttributes* SvgClipPathNode::getSvgStyleAttributes() const + { + return &maSvgStyleAttributes; + } + + void SvgClipPathNode::parseAttribute(const rtl::OUString& rTokenName, SVGToken aSVGToken, const rtl::OUString& aContent) + { + // call parent + SvgNode::parseAttribute(rTokenName, aSVGToken, aContent); + + // read style attributes + maSvgStyleAttributes.parseStyleAttribute(rTokenName, aSVGToken, aContent); + + // parse own + switch(aSVGToken) + { + case SVGTokenStyle: + { + maSvgStyleAttributes.readStyle(aContent); + break; + } + case SVGTokenTransform: + { + const basegfx::B2DHomMatrix aMatrix(readTransform(aContent, *this)); + + if(!aMatrix.isIdentity()) + { + setTransform(&aMatrix); + } + break; + } + case SVGTokenClipPathUnits: + { + if(aContent.getLength()) + { + if(aContent.match(commonStrings::aStrUserSpaceOnUse, 0)) + { + setClipPathUnits(userSpaceOnUse); + } + else if(aContent.match(commonStrings::aStrObjectBoundingBox, 0)) + { + setClipPathUnits(objectBoundingBox); + } + } + break; + } + default: + { + break; + } + } + } + + void SvgClipPathNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DSequence& rTarget, bool bReferenced) const + { + drawinglayer::primitive2d::Primitive2DSequence aNewTarget; + + // decompose childs + SvgNode::decomposeSvgNode(aNewTarget, bReferenced); + + if(aNewTarget.hasElements()) + { + if(getTransform()) + { + // create embedding group element with transformation + const drawinglayer::primitive2d::Primitive2DReference xRef( + new drawinglayer::primitive2d::TransformPrimitive2D( + *getTransform(), + aNewTarget)); + + drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xRef); + } + else + { + // append to current target + drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aNewTarget); + } + } + } + + void SvgClipPathNode::apply(drawinglayer::primitive2d::Primitive2DSequence& rContent) const + { + if(rContent.hasElements()) + { + const drawinglayer::geometry::ViewInformation2D aViewInformation2D; + drawinglayer::primitive2d::Primitive2DSequence aClipTarget; + basegfx::B2DPolyPolygon aClipPolyPolygon; + + // get clipPath definition as primitives + decomposeSvgNode(aClipTarget, true); + + if(aClipTarget.hasElements()) + { + // extract filled plygons as base for a mask PolyPolygon + drawinglayer::processor2d::ContourExtractor2D aExtractor(aViewInformation2D, true); + + aExtractor.process(aClipTarget); + + const basegfx::B2DPolyPolygonVector& rResult(aExtractor.getExtractedContour()); + const sal_uInt32 nSize(rResult.size()); + + if(nSize > 1) + { + // merge to single clipPolyPolygon + aClipPolyPolygon = basegfx::tools::mergeToSinglePolyPolygon(rResult); + } + else + { + aClipPolyPolygon = rResult[0]; + } + } + + if(aClipPolyPolygon.count()) + { + if(objectBoundingBox == getClipPathUnits()) + { + // clip is object-relative, transform using content transformation + const basegfx::B2DRange aContentRange( + drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence( + rContent, + aViewInformation2D)); + + aClipPolyPolygon.transform( + basegfx::tools::createScaleTranslateB2DHomMatrix( + aContentRange.getRange(), + aContentRange.getMinimum())); + } + + // redefine target. Use MaskPrimitive2D with created clip + // geometry. Using the automatically set mbIsClipPathContent at + // SvgStyleAttributes the clip definition is without fill, stroke, + // and strokeWidth and forced to black + const drawinglayer::primitive2d::Primitive2DReference xEmbedTransparence( + new drawinglayer::primitive2d::MaskPrimitive2D( + aClipPolyPolygon, + rContent)); + + rContent = drawinglayer::primitive2d::Primitive2DSequence(&xEmbedTransparence, 1); + } + else + { + // An empty clipping path will completely clip away the element that had + // the ‘clip-path’ property applied. (Svg spec) + rContent.realloc(0); + } + } + } + + } // end of namespace svgreader +} // end of namespace svgio + +////////////////////////////////////////////////////////////////////////////// +// eof + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |