| /************************************************************** |
| * |
| * 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 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| * |
| *************************************************************/ |
| |
| // MARKER(update_precomp.py): autogen include statement, do not remove |
| #include "precompiled_svgio.hxx" |
| |
| #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(), |
| mbStyleAttributesInitialized(false) // #125258# |
| { |
| } |
| |
| // #125258# |
| void SvgSvgNode::initializeStyleAttributes() |
| { |
| if(!mbStyleAttributesInitialized) |
| { |
| // #125258# determine if initial values need to be initialized with hard values |
| // for the case that this is the outmost SVG statement and it has no parent |
| // stale (CssStyle for svg may be defined) |
| bool bSetInitialValues(true); |
| |
| if(getParent()) |
| { |
| // #125258# no initial values when it's a SVG element embedded in SVG |
| bSetInitialValues = false; |
| } |
| |
| if(bSetInitialValues) |
| { |
| const SvgStyleAttributes* pStyles = getSvgStyleAttributes(); |
| |
| if(pStyles && pStyles->getParentStyle()) |
| { |
| // #125258# no initial values when SVG has a parent style (probably CssStyle) |
| bSetInitialValues = false; |
| } |
| } |
| |
| if(bSetInitialValues) |
| { |
| // #125258# only set if not yet initialized (SvgSvgNode::parseAttribute is already done, |
| // just setting may revert an already set valid value) |
| if(!maSvgStyleAttributes.isFillSet()) |
| { |
| // #125258# initial fill is black (see SVG1.1 spec) |
| maSvgStyleAttributes.setFill(SvgPaint(basegfx::BColor(0.0, 0.0, 0.0), true, true)); |
| } |
| } |
| |
| mbStyleAttributesInitialized = true; |
| } |
| } |
| |
| SvgSvgNode::~SvgSvgNode() |
| { |
| if(mpViewBox) delete mpViewBox; |
| } |
| |
| const SvgStyleAttributes* SvgSvgNode::getSvgStyleAttributes() const |
| { |
| // #125258# svg node can vahe CssStyles, too, so check for it here |
| static rtl::OUString aClassStr(rtl::OUString::createFromAscii("svg")); |
| |
| return checkForCssStyle(aClassStr, 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::seekReferenceWidth(double& fWidth, bool& bHasFound) const |
| { |
| if (!getParent() || bHasFound) |
| { |
| return; |
| } |
| const SvgSvgNode* pParentSvgSvgNode = 0; |
| // enclosing svg might have relative width, need to cumulate them till they are |
| // resolved somewhere up in the node tree |
| double fPercentage(1.0); |
| for(const SvgNode* pParent = getParent(); pParent && !bHasFound; pParent = pParent->getParent()) |
| { |
| // dynamic_cast results Null-pointer for not SvgSvgNode and so skips them in if condition |
| pParentSvgSvgNode = dynamic_cast< const SvgSvgNode* >(pParent); |
| if (pParentSvgSvgNode) |
| { |
| if (pParentSvgSvgNode->getViewBox()) |
| { |
| // viewbox values are already in 'user unit'. |
| fWidth = pParentSvgSvgNode->getViewBox()->getWidth() * fPercentage; |
| bHasFound = true; |
| } |
| else |
| { |
| // take absolute value or cummulate percentage |
| if (pParentSvgSvgNode->getWidth().isSet()) |
| { |
| if (Unit_percent == pParentSvgSvgNode->getWidth().getUnit()) |
| { |
| fPercentage *= pParentSvgSvgNode->getWidth().getNumber() * 0.01; |
| } |
| else |
| { |
| fWidth = pParentSvgSvgNode->getWidth().solveNonPercentage(*pParentSvgSvgNode) * fPercentage; |
| bHasFound = true; |
| } |
| } // not set => width=100% => factor 1, no need for else |
| } |
| } |
| } |
| } |
| |
| void SvgSvgNode::seekReferenceHeight(double& fHeight, bool& bHasFound) const |
| { |
| if (!getParent() || bHasFound) |
| { |
| return; |
| } |
| const SvgSvgNode* pParentSvgSvgNode = 0; |
| // enclosing svg might have relative width and height, need to cumulate them till they are |
| // resolved somewhere up in the node tree |
| double fPercentage(1.0); |
| for(const SvgNode* pParent = getParent(); pParent && !bHasFound; pParent = pParent->getParent()) |
| { |
| // dynamic_cast results Null-pointer for not SvgSvgNode and so skips them in if condition |
| pParentSvgSvgNode = dynamic_cast< const SvgSvgNode* >(pParent); |
| if (pParentSvgSvgNode) |
| { |
| if (pParentSvgSvgNode->getViewBox()) |
| { |
| // viewbox values are already in 'user unit'. |
| fHeight = pParentSvgSvgNode->getViewBox()->getHeight() * fPercentage; |
| bHasFound = true; |
| } |
| else |
| { |
| // take absolute value or cummulate percentage |
| if (pParentSvgSvgNode->getHeight().isSet()) |
| { |
| if (Unit_percent == pParentSvgSvgNode->getHeight().getUnit()) |
| { |
| fPercentage *= pParentSvgSvgNode->getHeight().getNumber() * 0.01; |
| } |
| else |
| { |
| fHeight = pParentSvgSvgNode->getHeight().solveNonPercentage(*pParentSvgSvgNode) * fPercentage; |
| bHasFound = true; |
| } |
| } // not set => height=100% => factor 1, no need for else |
| } |
| } |
| } |
| } |
| |
| // ToDo: Consider attribute overflow in method decomposeSvgNode |
| void SvgSvgNode::decomposeSvgNode(drawinglayer::primitive2d::Primitive2DSequence& rTarget, bool bReferenced) const |
| { |
| drawinglayer::primitive2d::Primitive2DSequence aSequence; |
| |
| // #125258# check now if we need to init some style settings locally. Do not do this |
| // in the constructor, there is not yet informatikon e.g. about existing CssStyles. |
| // Here all nodes are read and interpreted |
| const_cast< SvgSvgNode* >(this)->initializeStyleAttributes(); |
| |
| // decompose childs |
| SvgNode::decomposeSvgNode(aSequence, bReferenced); |
| |
| if(aSequence.hasElements()) |
| { |
| if(getParent()) |
| { |
| // #122594# if width/height is not given, it's 100% (see 5.1.2 The 'svg' element in SVG1.1 spec). |
| // If it is relative, the question is to what. The previous implementatin assumed relative to the |
| // local ViewBox which is implied by (4.2 Basic data types): |
| // |
| // "Note that the non-property <length> definition also allows a percentage unit identifier. |
| // The meaning of a percentage length value depends on the attribute for which the percentage |
| // length value has been specified. Two common cases are: (a) when a percentage length value |
| // represents a percentage of the viewport width or height (refer to the section that discusses |
| // units in general), and (b) when a percentage length value represents a percentage of the |
| // bounding box width or height on a given object (refer to the section that describes object |
| // bounding box units)." |
| |
| // Comparisons with commom browsers show, that it's mostly interpreted relative to the viewport |
| // of the parent, and so does the new implementation. |
| |
| // Extract known viewport data |
| // bXXXIsAbsolute tracks whether relative values could be resolved to absolute values |
| |
| // If width or height is not provided, the default 100% is used, see SVG 1.1 section 5.1.2 |
| // value 0.0 here is only to initialize variable |
| bool bWidthIsAbsolute(getWidth().isSet() && Unit_percent != getWidth().getUnit()); |
| double fW( bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : 0.0); |
| |
| bool bHeightIsAbsolute(getHeight().isSet() && Unit_percent != getHeight().getUnit()); |
| double fH( bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : 0.0); |
| |
| // If x or y not provided, then default 0.0 is used, see SVG 1.1 Section 5.1.2 |
| bool bXIsAbsolute((getX().isSet() && Unit_percent != getX().getUnit()) || !getX().isSet()); |
| double fX( bXIsAbsolute && getX().isSet() ? getX().solveNonPercentage(*this) : 0.0); |
| |
| bool bYIsAbsolute((getY().isSet() && Unit_percent != getY().getUnit()) || !getY().isSet()); |
| double fY( bYIsAbsolute && getY().isSet() ? getY().solveNonPercentage(*this) : 0.0); |
| |
| if ( !bXIsAbsolute || !bWidthIsAbsolute) |
| { |
| // get width of enclosing svg and resolve percentage in x and width; |
| double fWReference(0.0); |
| bool bHasFoundWidth(false); |
| seekReferenceWidth(fWReference, bHasFoundWidth); |
| if (!bHasFoundWidth) |
| { |
| // Even outermost svg has not all information to resolve relative values, |
| // I use content itself as fallback to set missing values for viewport |
| // Any better idea for such ill structures svg documents? |
| const basegfx::B2DRange aChildRange( |
| drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence( |
| aSequence, |
| drawinglayer::geometry::ViewInformation2D())); |
| fWReference = aChildRange.getWidth(); |
| } |
| // referenced values are already in 'user unit' |
| if (!bXIsAbsolute) |
| { |
| fX = getX().getNumber() * 0.01 * fWReference; |
| } |
| if (!bWidthIsAbsolute) |
| { |
| fW = (getWidth().isSet() ? getWidth().getNumber() *0.01 : 1.0) * fWReference; |
| } |
| } |
| |
| if ( !bYIsAbsolute || !bHeightIsAbsolute) |
| { |
| // get height of enclosing svg and resolve percentage in y and height |
| double fHReference(0.0); |
| bool bHasFoundHeight(false); |
| seekReferenceHeight(fHReference, bHasFoundHeight); |
| if (!bHasFoundHeight) |
| { |
| // Even outermost svg has not all information to resolve relative values, |
| // I use content itself as fallback to set missing values for viewport |
| // Any better idea for such ill structures svg documents? |
| const basegfx::B2DRange aChildRange( |
| drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence( |
| aSequence, |
| drawinglayer::geometry::ViewInformation2D())); |
| fHReference = aChildRange.getHeight(); |
| } |
| |
| // referenced values are already in 'user unit' |
| if (!bYIsAbsolute) |
| { |
| fY = getY().getNumber() * 0.01 * fHReference; |
| } |
| if (!bHeightIsAbsolute) |
| { |
| fH = (getHeight().isSet() ? getHeight().getNumber() *0.01 : 1.0) * fHReference; |
| } |
| } |
| |
| if(getViewBox()) |
| { |
| // SVG 1.1 defines in section 7.7 that a negative value for width or height |
| // in viewBox is an error and that 0.0 disables rendering |
| if(basegfx::fTools::more(getViewBox()->getWidth(),0.0) && basegfx::fTools::more(getViewBox()->getHeight(),0.0)) |
| { |
| // create target range homing x,y, width and height as calculated above |
| 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 |
| // #i122610 SVG 1.1 defines in section 5.1.2 that if the attribute perserveAspectRatio is not specified, |
| // then the effect is as if a value of 'xMidYMid meet' were specified. |
| SvgAspectRatio aRatioDefault(Align_xMidYMid,false,true); |
| const SvgAspectRatio& rRatio = getSvgAspectRatio().isSet()? getSvgAspectRatio() : aRatioDefault; |
| |
| // 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 // no viewBox attribute |
| { |
| // 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)) |
| { |
| 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 |
| { |
| double fW = 0.0; // effective value depends on viewBox |
| double fH = 0.0; |
| |
| // Svg defines that a negative value is an error and that 0.0 disables rendering |
| // isPositive() not usable because it allows 0.0 in contrast to mathematical definition of 'positive' |
| const bool bWidthInvalid(getWidth().isSet() && basegfx::fTools::lessOrEqual(getWidth().getNumber(), 0.0)); |
| const bool bHeightInvalid(getHeight().isSet() && basegfx::fTools::lessOrEqual(getHeight().getNumber(), 0.0)); |
| if(!bWidthInvalid && !bHeightInvalid) |
| { |
| basegfx::B2DRange aSvgCanvasRange; // effective value depends on viewBox |
| if(getViewBox()) |
| { |
| // SVG 1.1 defines in section 7.7 that a negative value for width or height |
| // in viewBox is an error and that 0.0 disables rendering |
| const double fViewBoxWidth = getViewBox()->getWidth(); |
| const double fViewBoxHeight = getViewBox()->getHeight(); |
| if(basegfx::fTools::more(fViewBoxWidth,0.0) && basegfx::fTools::more(fViewBoxHeight,0.0)) |
| { |
| // The intrinsic aspect ratio of the svg element is given by absolute values of both width and height |
| // or if one or both of them is relative by the width and height of the viewBox |
| // see SVG 1.1 section 7.12 |
| const bool bWidthIsAbsolute(getWidth().isSet() && Unit_percent != getWidth().getUnit()); |
| const bool bHeightIsAbsolute(getHeight().isSet() && Unit_percent != getHeight().getUnit()); |
| if(bWidthIsAbsolute && bHeightIsAbsolute) |
| { |
| fW =getWidth().solveNonPercentage(*this); |
| fH =getHeight().solveNonPercentage(*this); |
| } |
| else if (bWidthIsAbsolute) |
| { |
| fW = getWidth().solveNonPercentage(*this); |
| fH = fW * fViewBoxWidth / fViewBoxHeight ; |
| } |
| else if (bHeightIsAbsolute) |
| { |
| fH = getHeight().solveNonPercentage(*this); |
| fW = fH * fViewBoxWidth / fViewBoxHeight ; |
| } |
| else |
| { |
| fW = fViewBoxWidth; |
| fH = fViewBoxHeight; |
| } |
| // SVG 1.1 defines in section 5.1.2 that x,y has no meanig for the outermost SVG element. |
| aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); |
| |
| // create mapping |
| // SVG 1.1 defines in section 5.1.2 that if the attribute perserveAspectRatio is not specified, |
| // then the effect is as if a value of 'xMidYMid meet' were specified. |
| SvgAspectRatio aRatioDefault(Align_xMidYMid,false,true); |
| const SvgAspectRatio& rRatio = getSvgAspectRatio().isSet()? getSvgAspectRatio() : aRatioDefault; |
| |
| basegfx::B2DHomMatrix aViewBoxMapping; |
| aViewBoxMapping = rRatio.createMapping(aSvgCanvasRange, *getViewBox()); |
| // no need to check ratio here for slice, the outermost Svg will |
| // be clipped anyways (see below) |
| |
| // scale content to viewBox definitions |
| const drawinglayer::primitive2d::Primitive2DReference xTransform( |
| new drawinglayer::primitive2d::TransformPrimitive2D( |
| aViewBoxMapping, |
| aSequence)); |
| |
| aSequence = drawinglayer::primitive2d::Primitive2DSequence(&xTransform, 1); |
| } |
| } |
| else // no viewbox |
| { |
| // There exists no parent to resolve relative width or height. |
| // Use child size as fallback. |
| const bool bWidthIsAbsolute(getWidth().isSet() && Unit_percent != getWidth().getUnit()); |
| const bool bHeightIsAbsolute(getHeight().isSet() && Unit_percent != getHeight().getUnit()); |
| if (bWidthIsAbsolute && bHeightIsAbsolute) |
| { |
| fW =getWidth().solveNonPercentage(*this); |
| fH =getHeight().solveNonPercentage(*this); |
| |
| } |
| else |
| { |
| const basegfx::B2DRange aChildRange( |
| drawinglayer::primitive2d::getB2DRangeFromPrimitive2DSequence( |
| aSequence, |
| drawinglayer::geometry::ViewInformation2D())); |
| const double fChildWidth(aChildRange.getWidth()); |
| const double fChildHeight(aChildRange.getHeight()); |
| fW = bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : fChildWidth; |
| fH = bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : fChildHeight; |
| } |
| // SVG 1.1 defines in section 5.1.2 that x,y has no meanig for the outermost SVG element. |
| aSvgCanvasRange = basegfx::B2DRange(0.0, 0.0, fW, fH); |
| } |
| |
| // 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 inch == 25.4 mm to get from Svg coordinates (px) to |
| // drawinglayer coordinates |
| const double fScaleTo100thmm(25.4 * 100.0 / F_SVG_PIXEL_PER_INCH); |
| 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 // viewport should be given by x, y, width, and height |
| { |
| // Extract known viewport data |
| // bXXXIsAbsolute tracks whether relative values could be resolved to absolute values |
| if (getParent()) |
| { |
| // If width or height is not provided, the default 100% is used, see SVG 1.1 section 5.1.2 |
| // value 0.0 here is only to initialize variable |
| bool bWidthIsAbsolute(getWidth().isSet() && Unit_percent != getWidth().getUnit()); |
| double fW( bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : 0.0); |
| bool bHeightIsAbsolute(getHeight().isSet() && Unit_percent != getHeight().getUnit()); |
| double fH( bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : 0.0); |
| |
| // If x or y not provided, then default 0.0 is used, see SVG 1.1 Section 5.1.2 |
| bool bXIsAbsolute((getX().isSet() && Unit_percent != getX().getUnit()) || !getX().isSet()); |
| double fX( bXIsAbsolute && getX().isSet() ? getX().solveNonPercentage(*this) : 0.0); |
| |
| bool bYIsAbsolute((getY().isSet() && Unit_percent != getY().getUnit()) || !getY().isSet()); |
| double fY( bYIsAbsolute && getY().isSet() ? getY().solveNonPercentage(*this) : 0.0); |
| |
| if (bXIsAbsolute && bYIsAbsolute && bWidthIsAbsolute && bHeightIsAbsolute) |
| { |
| return basegfx::B2DRange(fX, fY, fX+fW, fY+fH); |
| } |
| else // try to resolve relative values |
| { |
| if (!bXIsAbsolute || !bWidthIsAbsolute) |
| { |
| // get width of enclosing svg and resolve percentage in x and width |
| double fWReference(0.0); |
| bool bHasFoundWidth(false); |
| seekReferenceWidth(fWReference, bHasFoundWidth); |
| // referenced values are already in 'user unit' |
| if (!bXIsAbsolute && bHasFoundWidth) |
| { |
| fX = getX().getNumber() * 0.01 * fWReference; |
| bXIsAbsolute = true; |
| } |
| if (!bWidthIsAbsolute && bHasFoundWidth) |
| { |
| fW = (getWidth().isSet() ? getWidth().getNumber() *0.01 : 1.0) * fWReference; |
| bWidthIsAbsolute = true; |
| } |
| } |
| if (!bYIsAbsolute || !bHeightIsAbsolute) |
| { |
| // get height of enclosing svg and resolve percentage in y and height |
| double fHReference(0.0); |
| bool bHasFoundHeight(false); |
| seekReferenceHeight(fHReference, bHasFoundHeight); |
| // referenced values are already in 'user unit' |
| if (!bYIsAbsolute && bHasFoundHeight) |
| { |
| fY = getY().getNumber() * 0.01 * fHReference; |
| bYIsAbsolute = true; |
| } |
| if (!bHeightIsAbsolute && bHasFoundHeight) |
| { |
| fH = (getHeight().isSet() ? getHeight().getNumber() *0.01 : 1.0) * fHReference; |
| bHeightIsAbsolute = true; |
| } |
| } |
| |
| if (bXIsAbsolute && bYIsAbsolute && bWidthIsAbsolute && bHeightIsAbsolute) |
| { |
| return basegfx::B2DRange(fX, fY, fX+fW, fY+fH); |
| } |
| else // relative values could not be resolved, there exists no fallback |
| { |
| return SvgNode::getCurrentViewPort(); |
| } |
| } |
| } |
| else //outermost svg |
| { |
| // If width or height is not provided, the default would be 100%, see SVG 1.1 section 5.1.2 |
| // But here it cannot be resolved and no fallback exists. |
| // SVG 1.1 defines in section 5.1.2 that x,y has no meanig for the outermost SVG element. |
| bool bWidthIsAbsolute(getWidth().isSet() && Unit_percent != getWidth().getUnit()); |
| double fW( bWidthIsAbsolute ? getWidth().solveNonPercentage(*this) : 0.0); |
| bool bHeightIsAbsolute(getHeight().isSet() && Unit_percent != getHeight().getUnit()); |
| double fH( bHeightIsAbsolute ? getHeight().solveNonPercentage(*this) : 0.0); |
| if (bWidthIsAbsolute && bHeightIsAbsolute) |
| { |
| return basegfx::B2DRange(0.0, 0.0, fW, fH); |
| } |
| else // no fallback exists |
| { |
| return SvgNode::getCurrentViewPort(); |
| } |
| } |
| // ToDo: Is it possible to decompose and use the bounding box of the childs, if even the |
| // outermost svg has no information to resolve percentage? Is it worth, how expensive is it? |
| |
| } |
| } |
| |
| } // end of namespace svgreader |
| } // end of namespace svgio |
| |
| ////////////////////////////////////////////////////////////////////////////// |
| // eof |
