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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 <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>
#include <o3tl/string_view.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(SVGToken aSVGToken, const OUString& aContent)
{
// call parent
SvgNode::parseAttribute(aSVGToken, aContent);
// read style attributes
maSvgStyleAttributes.parseStyleAttribute(aSVGToken, aContent);
// 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(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), commonStrings::aStrUserSpaceOnUse))
{
setMaskUnits(SvgUnits::userSpaceOnUse);
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), commonStrings::aStrObjectBoundingBox))
{
setMaskUnits(SvgUnits::objectBoundingBox);
}
}
break;
}
case SVGToken::MaskContentUnits:
{
if(!aContent.isEmpty())
{
if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), commonStrings::aStrUserSpaceOnUse))
{
setMaskContentUnits(SvgUnits::userSpaceOnUse);
}
else if(o3tl::equalsIgnoreAsciiCase(o3tl::trim(aContent), 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: */
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