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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/svgsvgnode.hxx>
#include <drawinglayer/geometry/viewinformation2d.hxx>
#include <drawinglayer/primitive2d/transformprimitive2d.hxx>
#include <drawinglayer/primitive2d/maskprimitive2d.hxx>
#include <basegfx/polygon/b2dpolygontools.hxx>
#include <basegfx/polygon/b2dpolygon.hxx>
#include <basegfx/matrix/b2dhommatrixtools.hxx>
#include <drawinglayer/primitive2d/polygonprimitive2d.hxx>
#include <drawinglayer/primitive2d/hiddengeometryprimitive2d.hxx>
//////////////////////////////////////////////////////////////////////////////
namespace svgio
{
namespace svgreader
{
SvgSvgNode::SvgSvgNode(
SvgDocument& rDocument,
SvgNode* pParent)
: SvgNode(SVGTokenSvg, rDocument, pParent),
maSvgStyleAttributes(*this),
mpViewBox(0),
maSvgAspectRatio(),
maX(),
maY(),
maWidth(),
maHeight(),
maVersion()
{
if(!getParent())
{
// initial fill is black
maSvgStyleAttributes.setFill(SvgPaint(basegfx::BColor(0.0, 0.0, 0.0), true, true));
}
}
SvgSvgNode::~SvgSvgNode()
{
if(mpViewBox) delete mpViewBox;
}
const SvgStyleAttributes* SvgSvgNode::getSvgStyleAttributes() const
{
return &maSvgStyleAttributes;
}
void SvgSvgNode::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 SVGTokenViewBox:
{
const basegfx::B2DRange aRange(readViewBox(aContent, *this));
if(!aRange.isEmpty())
{
setViewBox(&aRange);
}
break;
}
case SVGTokenPreserveAspectRatio:
{
setSvgAspectRatio(readSvgAspectRatio(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 SVGTokenVersion:
{
SvgNumber aNum;
if(readSingleNumber(aContent, aNum))
{
setVersion(aNum);
}
break;
}
default:
{
break;
}
}
}
void SvgSvgNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DSequence& rTarget, bool bReferenced) const
{
drawinglayer::primitive2d::Primitive2DSequence aSequence;
// decompose childs
SvgNode::decomposeSvgNode(aSequence, bReferenced);
if(aSequence.hasElements())
{
if(getParent())
{
if(getViewBox())
{
// Svg defines that with no width or no height the viewBox content is empty,
// so both need to exist
if(!basegfx::fTools::equalZero(getViewBox()->getWidth()) && !basegfx::fTools::equalZero(getViewBox()->getHeight()))
{
// create target range homing x,y, width and height as given
const double fX(getX().isSet() ? getX().solve(*this, xcoordinate) : 0.0);
const double fY(getY().isSet() ? getY().solve(*this, ycoordinate) : 0.0);
const double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : getViewBox()->getWidth());
const double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : getViewBox()->getHeight());
const basegfx::B2DRange aTarget(fX, fY, fX + fW, fY + fH);
if(aTarget.equal(*getViewBox()))
{
// no mapping needed, append
drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aSequence);
}
else
{
// create mapping
const SvgAspectRatio& rRatio = getSvgAspectRatio();
if(rRatio.isSet())
{
// let mapping be created from SvgAspectRatio
const basegfx::B2DHomMatrix aEmbeddingTransform(
rRatio.createMapping(aTarget, *getViewBox()));
// prepare embedding in transformation
const drawinglayer::primitive2d::Primitive2DReference xRef(
new drawinglayer::primitive2d::TransformPrimitive2D(
aEmbeddingTransform,
aSequence));
if(rRatio.isMeetOrSlice())
{
// embed in transformation
drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xRef);
}
else
{
// need to embed in MaskPrimitive2D, too
const drawinglayer::primitive2d::Primitive2DReference xMask(
new drawinglayer::primitive2d::MaskPrimitive2D(
basegfx::B2DPolyPolygon(basegfx::tools::createPolygonFromRect(aTarget)),
drawinglayer::primitive2d::Primitive2DSequence(&xRef, 1)));
drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xMask);
}
}
else
{
// choose default mapping
const basegfx::B2DHomMatrix aEmbeddingTransform(
rRatio.createLinearMapping(
aTarget, *getViewBox()));
// embed in transformation
const drawinglayer::primitive2d::Primitive2DReference xTransform(
new drawinglayer::primitive2d::TransformPrimitive2D(
aEmbeddingTransform,
aSequence));
drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xTransform);
}
}
}
}
else
{
// check if we have a size
const double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : 0.0);
const double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : 0.0);
// Svg defines that a negative value is an error and that 0.0 disables rendering
if(basegfx::fTools::more(fW, 0.0) && basegfx::fTools::more(fH, 0.0))
{
// check if we have a x,y position
const double fX(getX().isSet() ? getX().solve(*this, xcoordinate) : 0.0);
const double fY(getY().isSet() ? getY().solve(*this, ycoordinate) : 0.0);
if(!basegfx::fTools::equalZero(fX) || !basegfx::fTools::equalZero(fY))
{
// embed in transform
const drawinglayer::primitive2d::Primitive2DReference xRef(
new drawinglayer::primitive2d::TransformPrimitive2D(
basegfx::tools::createTranslateB2DHomMatrix(fX, fY),
aSequence));
aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xRef, 1);
}
// embed in MaskPrimitive2D to clip
const drawinglayer::primitive2d::Primitive2DReference xMask(
new drawinglayer::primitive2d::MaskPrimitive2D(
basegfx::B2DPolyPolygon(
basegfx::tools::createPolygonFromRect(
basegfx::B2DRange(fX, fY, fX + fW, fY + fH))),
aSequence));
// append
drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(rTarget, xMask);
}
}
}
else
{
// Outermost SVG element; create target range homing width and height as given.
// SVG defines that x,y has no meanig for the outermost SVG element. Use a fallback
// width and height of din A 4 (21 x 29,7 cm)
double fW(getWidth().isSet() ? getWidth().solve(*this, xcoordinate) : (210.0 * 3.543307));
double fH(getHeight().isSet() ? getHeight().solve(*this, ycoordinate) : (297.0 * 3.543307));
// Svg defines that a negative value is an error and that 0.0 disables rendering
if(basegfx::fTools::more(fW, 0.0) && basegfx::fTools::more(fH, 0.0))
{
const basegfx::B2DRange aSvgCanvasRange(0.0, 0.0, fW, fH);
if(getViewBox())
{
if(!basegfx::fTools::equalZero(getViewBox()->getWidth()) && !basegfx::fTools::equalZero(getViewBox()->getHeight()))
{
// create mapping
const SvgAspectRatio& rRatio = getSvgAspectRatio();
basegfx::B2DHomMatrix aViewBoxMapping;
if(rRatio.isSet())
{
// let mapping be created from SvgAspectRatio
aViewBoxMapping = rRatio.createMapping(aSvgCanvasRange, *getViewBox());
// no need to check ratio here for slice, the outermost Svg will
// be clipped anyways (see below)
}
else
{
// choose default mapping
aViewBoxMapping = rRatio.createLinearMapping(aSvgCanvasRange, *getViewBox());
}
// scale content to viewBox definitions
const drawinglayer::primitive2d::Primitive2DReference xTransform(
new drawinglayer::primitive2d::TransformPrimitive2D(
aViewBoxMapping,
aSequence));
aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1);
}
}
// to be completely correct in Svg sense it is necessary to clip
// the whole content to the given canvas. I choose here to do this
// initially despite I found various examples of Svg files out there
// which have no correct values for this clipping. It's correct
// due to the Svg spec.
bool bDoCorrectCanvasClipping(true);
if(bDoCorrectCanvasClipping)
{
// different from Svg we have the possibility with primitives to get
// a correct bounding box for the geometry. Get it for evtl. taking action
const basegfx::B2DRange aContentRange(
drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence(
aSequence,
drawinglayer::geometry::ViewInformation2D()));
if(aSvgCanvasRange.isInside(aContentRange))
{
// no clip needed, but an invisible HiddenGeometryPrimitive2D
// to allow getting the full Svg range using the primitive mechanisms.
// This is needed since e.g. an SdrObject using this as graphic will
// create a mapping transformation to exactly map the content to it's
// real life size
const drawinglayer::primitive2d::Primitive2DReference xLine(
new drawinglayer::primitive2d::PolygonHairlinePrimitive2D(
basegfx::tools::createPolygonFromRect(
aSvgCanvasRange),
basegfx::BColor(0.0, 0.0, 0.0)));
const drawinglayer::primitive2d::Primitive2DReference xHidden(
new drawinglayer::primitive2d::HiddenGeometryPrimitive2D(
drawinglayer::primitive2d::Primitive2DSequence(&xLine, 1)));
drawinglayer::primitive2d::appendPrimitive2DReferenceToPrimitive2DSequence(aSequence, xHidden);
}
else if(aSvgCanvasRange.overlaps(aContentRange))
{
// Clip is necessary. This will make Svg images evtl. smaller
// than wanted from Svg (the free space which may be around it is
// conform to the Svg spec), but avoids an expensive and unneccessary
// clip. Keep the full Svg range here to get the correct mappings
// to objects using this. Optimizations can be done in the processors
const drawinglayer::primitive2d::Primitive2DReference xMask(
new drawinglayer::primitive2d::MaskPrimitive2D(
basegfx::B2DPolyPolygon(
basegfx::tools::createPolygonFromRect(
aSvgCanvasRange)),
aSequence));
aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xMask, 1);
}
else
{
// not inside, no overlap. Empty Svg
aSequence.realloc(0);
}
}
if(aSequence.hasElements())
{
// embed in transform primitive to scale to 1/100th mm
// where 1 mm == 3.543307 px to get from Svg coordinates to
// drawinglayer ones
const double fScaleTo100thmm(100.0 / 3.543307);
const basegfx::B2DHomMatrix aTransform(
basegfx::tools::createScaleB2DHomMatrix(
fScaleTo100thmm,
fScaleTo100thmm));
const drawinglayer::primitive2d::Primitive2DReference xTransform(
new drawinglayer::primitive2d::TransformPrimitive2D(
aTransform,
aSequence));
aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1);
// append to result
drawinglayer::primitive2d::appendPrimitive2DSequenceToPrimitive2DSequence(rTarget, aSequence);
}
}
}
}
}
const basegfx::B2DRange* SvgSvgNode::getCurrentViewPort() const
{
if(getViewBox())
{
return getViewBox();
}
else
{
return SvgNode::getCurrentViewPort();
}
}
} // end of namespace svgreader
} // end of namespace svgio
//////////////////////////////////////////////////////////////////////////////
// eof
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
|
