svgfedropshadownode.cxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 * This file incorporates work covered by the following license notice:
 *
 *   Licensed to the Apache Software Foundation (ASF) under one or more
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#include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
#include <drawinglayer/primitive2d/shadowprimitive2d.hxx>
#include <drawinglayer/primitive2d/unifiedtransparenceprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <svgfedropshadownode.hxx>
#include <o3tl/string_view.hxx>
 
namespace svgio::svgreader
{
SvgFeDropShadowNode::SvgFeDropShadowNode(SvgDocument& rDocument, SvgNode* pParent)
    : SvgFilterNode(SVGToken::FeDropShadow, rDocument, pParent)
    , maDx(0.0)
    , maDy(0.0)
    , maStdDeviation(0.0)
    , maFloodColor(SvgPaint())
    , maFloodOpacity(1.0)
{
}
 
SvgFeDropShadowNode::~SvgFeDropShadowNode() {}
 
void SvgFeDropShadowNode::parseAttribute(const OUString& /*rTokenName*/, SVGToken aSVGToken,
                                         const OUString& aContent)
{
    // parse own
    switch (aSVGToken)
    {
        case SVGToken::Style:
        {
            readLocalCssStyle(aContent);
            break;
        }
        case SVGToken::Dx:
        {
            SvgNumber aNum;
 
            if (readSingleNumber(aContent, aNum))
            {
                maDx = aNum;
            }
            break;
        }
        case SVGToken::Dy:
        {
            SvgNumber aNum;
 
            if (readSingleNumber(aContent, aNum))
            {
                maDy = aNum;
            }
            break;
        }
        case SVGToken::StdDeviation:
        {
            SvgNumber aNum;
 
            if (readSingleNumber(aContent, aNum))
            {
                maStdDeviation = aNum;
            }
            break;
        }
        case SVGToken::FloodColor:
        {
            SvgPaint aSvgPaint;
            OUString aURL;
            SvgNumber aOpacity;
 
            if (readSvgPaint(aContent, aSvgPaint, aURL, aOpacity))
            {
                maFloodColor = aSvgPaint;
            }
            break;
        }
        case SVGToken::FloodOpacity:
        {
            SvgNumber aNum;
 
            if (readSingleNumber(aContent, aNum))
            {
                maFloodOpacity = SvgNumber(std::clamp(aNum.getNumber(), 0.0, 1.0), aNum.getUnit(),
                                           aNum.isSet());
            }
            break;
        }
 
        default:
        {
            break;
        }
    }
}
 
void SvgFeDropShadowNode::apply(drawinglayer::primitive2d::Primitive2DContainer& rTarget) const
{
    basegfx::B2DHomMatrix aTransform;
    if (maDx.isSet() || maDy.isSet())
    {
        aTransform.translate(maDx.solve(*this, NumberType::xcoordinate),
                             maDy.solve(*this, NumberType::ycoordinate));
    }
 
    drawinglayer::primitive2d::Primitive2DContainer aTempTarget;
 
    // Create the shadow
    aTempTarget.append(drawinglayer::primitive2d::Primitive2DReference(
        new drawinglayer::primitive2d::ShadowPrimitive2D(
            aTransform, maFloodColor.getBColor(), maStdDeviation.getNumber(),
            drawinglayer::primitive2d::Primitive2DContainer(rTarget))));
 
    const double fOpacity(maFloodOpacity.solve(*this));
    if (basegfx::fTools::less(fOpacity, 1.0))
    {
        // Apply transparence to the shadow
        aTempTarget.append(drawinglayer::primitive2d::Primitive2DReference(
            new drawinglayer::primitive2d::UnifiedTransparencePrimitive2D(std::move(aTempTarget),
                                                                          1.0 - fOpacity)));
    }
 
    // Append the original target
    aTempTarget.append(rTarget);
 
    rTarget = aTempTarget;
}
 
} // end of namespace svgio::svgreader
 
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */