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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/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
+{
+ namespace svgreader
+ {
+ SvgMaskNode::SvgMaskNode(
+ SvgDocument& rDocument,
+ SvgNode* pParent)
+ : SvgNode(SVGTokenMask, rDocument, pParent),
+ maSvgStyleAttributes(*this),
+ maX(SvgNumber(-10.0, Unit_percent, true)),
+ maY(SvgNumber(-10.0, Unit_percent, true)),
+ maWidth(SvgNumber(120.0, Unit_percent, true)),
+ maHeight(SvgNumber(120.0, Unit_percent, true)),
+ mpaTransform(0),
+ maMaskUnits(objectBoundingBox),
+ maMaskContentUnits(userSpaceOnUse)
+ {
+ }
+
+ SvgMaskNode::~SvgMaskNode()
+ {
+ if(mpaTransform) delete mpaTransform;
+ }
+
+ const SvgStyleAttributes* SvgMaskNode::getSvgStyleAttributes() const
+ {
+ return &maSvgStyleAttributes;
+ }
+
+ void SvgMaskNode::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 SVGTokenX:
+ {
+ SvgNumber aNum;
+
+ if(readSingleNumber(aContent, aNum))
+ {
+ setX(aNum);
+ }
+ break;
+ }
+ case SVGTokenY:
+ {
+ SvgNumber aNum;
+
+ if(readSingleNumber(aContent, aNum))
+ {
+ setY(aNum);
+ }
+ break;
+ }
+ case SVGTokenWidth:
+ {
+ SvgNumber aNum;
+
+ if(readSingleNumber(aContent, aNum))
+ {
+ if(aNum.isPositive())
+ {
+ setWidth(aNum);
+ }
+ }
+ break;
+ }
+ case SVGTokenHeight:
+ {
+ SvgNumber aNum;
+
+ if(readSingleNumber(aContent, aNum))
+ {
+ if(aNum.isPositive())
+ {
+ setHeight(aNum);
+ }
+ }
+ break;
+ }
+ case SVGTokenTransform:
+ {
+ const basegfx::B2DHomMatrix aMatrix(readTransform(aContent, *this));
+
+ if(!aMatrix.isIdentity())
+ {
+ setTransform(&aMatrix);
+ }
+ break;
+ }
+ case SVGTokenMaskUnits:
+ {
+ if(aContent.getLength())
+ {
+ if(aContent.match(commonStrings::aStrUserSpaceOnUse, 0))
+ {
+ setMaskUnits(userSpaceOnUse);
+ }
+ else if(aContent.match(commonStrings::aStrObjectBoundingBox, 0))
+ {
+ setMaskUnits(objectBoundingBox);
+ }
+ }
+ break;
+ }
+ case SVGTokenMaskContentUnits:
+ {
+ if(aContent.getLength())
+ {
+ if(aContent.match(commonStrings::aStrUserSpaceOnUse, 0))
+ {
+ setMaskContentUnits(userSpaceOnUse);
+ }
+ else if(aContent.match(commonStrings::aStrObjectBoundingBox, 0))
+ {
+ setMaskContentUnits(objectBoundingBox);
+ }
+ }
+ break;
+ }
+ default:
+ {
+ break;
+ }
+ }
+ }
+
+ void SvgMaskNode::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));
+
+ aNewTarget = drawinglayer::primitive2d::Primitive2DSequence(&xRef, 1);
+ }
+
+ // append to current target
+ drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aNewTarget);
+ }
+ }
+
+ void SvgMaskNode::apply(drawinglayer::primitive2d::Primitive2DSequence& rTarget) const
+ {
+ if(rTarget.hasElements())
+ {
+ drawinglayer::primitive2d::Primitive2DSequence aMaskTarget;
+
+ // get mask definition as primitives
+ decomposeSvgNode(aMaskTarget, true);
+
+ if(aMaskTarget.hasElements())
+ {
+ // get range of content to be masked
+ const basegfx::B2DRange aContentRange(
+ drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence(
+ rTarget,
+ 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(objectBoundingBox == getMaskUnits())
+ {
+ // fractions or percentages of the bounding box of the element to which the mask is applied
+ const double fX(Unit_percent == getX().getUnit() ? getX().getNumber() * 0.01 : getX().getNumber());
+ const double fY(Unit_percent == getY().getUnit() ? getY().getNumber() * 0.01 : getY().getNumber());
+ const double fW(Unit_percent == getWidth().getUnit() ? getWidth().getNumber() * 0.01 : getWidth().getNumber());
+ const double fH(Unit_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, xcoordinate) : 0.0);
+ const double fY(getY().isSet() ? getY().solve(*this, ycoordinate) : 0.0);
+
+ aOffscreenBufferRange = basegfx::B2DRange(
+ fX,
+ fY,
+ fX + (getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : 0.0),
+ fY + (getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : 0.0));
+ }
+
+ if(objectBoundingBox == getMaskContentUnits())
+ {
+ // mask is object-relative, embed in content transformation
+ const drawinglayer::primitive2d::Primitive2DReference xTransform(
+ new drawinglayer::primitive2d::TransformPrimitive2D(
+ basegfx::tools::createScaleTranslateB2DHomMatrix(
+ aContentRange.getRange(),
+ aContentRange.getMinimum()),
+ aMaskTarget));
+
+ aMaskTarget = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1);
+ }
+
+ // embed content to a ModifiedColorPrimitive2D since the definitions
+ // how content is used as alpha is special for Svg
+ {
+ const drawinglayer::primitive2d::Primitive2DReference xInverseMask(
+ new drawinglayer::primitive2d::ModifiedColorPrimitive2D(
+ aMaskTarget,
+ basegfx::BColorModifier(
+ basegfx::BColor(0.0, 0.0, 0.0),
+ 0.5,
+ basegfx::BCOLORMODIFYMODE_LUMINANCE_TO_ALPHA)));
+
+ aMaskTarget = drawinglayer::primitive2d::Primitive2DSequence(&xInverseMask, 1);
+ }
+
+ // prepare new content
+ drawinglayer::primitive2d::Primitive2DReference xNewContent(
+ new drawinglayer::primitive2d::TransparencePrimitive2D(
+ rTarget,
+ 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::tools::createPolygonFromRect(
+ aOffscreenBufferRange)),
+ drawinglayer::primitive2d::Primitive2DSequence(&xNewContent, 1));
+ }
+
+ // redefine target. Use TransparencePrimitive2D with created mask
+ // geometry
+ rTarget = drawinglayer::primitive2d::Primitive2DSequence(&xNewContent, 1);
+ }
+ else
+ {
+ // content is geometrically empty
+ rTarget.realloc(0);
+ }
+ }
+ else
+ {
+ // An empty clipping path will completely clip away the element that had
+ // the ‘clip-path’ property applied. (Svg spec)
+ rTarget.realloc(0);
+ }
+ }
+ }
+
+ } // end of namespace svgreader
+} // end of namespace svgio
+
+//////////////////////////////////////////////////////////////////////////////
+// eof
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */