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/* -*- 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: */
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