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Diffstat (limited to 'drawinglayer/source/primitive2d/gridprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/gridprimitive2d.cxx | 336 |
1 files changed, 336 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/gridprimitive2d.cxx b/drawinglayer/source/primitive2d/gridprimitive2d.cxx new file mode 100644 index 000000000..ddb468e9a --- /dev/null +++ b/drawinglayer/source/primitive2d/gridprimitive2d.cxx @@ -0,0 +1,336 @@ +/* -*- 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 <drawinglayer/primitive2d/gridprimitive2d.hxx> +#include <drawinglayer/primitive2d/pointarrayprimitive2d.hxx> +#include <drawinglayer/primitive2d/markerarrayprimitive2d.hxx> +#include <drawinglayer/geometry/viewinformation2d.hxx> +#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> + + +using namespace com::sun::star; + + +namespace drawinglayer::primitive2d +{ + void GridPrimitive2D::create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const + { + if(!(!rViewInformation.getViewport().isEmpty() && getWidth() > 0.0 && getHeight() > 0.0)) + return; + + // decompose grid matrix to get logic size + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + getTransform().decompose(aScale, aTranslate, fRotate, fShearX); + + // create grid matrix which transforms from scaled logic to view + basegfx::B2DHomMatrix aRST(basegfx::utils::createShearXRotateTranslateB2DHomMatrix( + fShearX, fRotate, aTranslate.getX(), aTranslate.getY())); + aRST *= rViewInformation.getObjectToViewTransformation(); + + // get step widths + double fStepX(getWidth()); + double fStepY(getHeight()); + const double fMinimalStep(10.0); + + // guarantee a step width of 10.0 + if(basegfx::fTools::less(fStepX, fMinimalStep)) + { + fStepX = fMinimalStep; + } + + if(basegfx::fTools::less(fStepY, fMinimalStep)) + { + fStepY = fMinimalStep; + } + + // get relative distances in view coordinates + double fViewStepX((rViewInformation.getObjectToViewTransformation() * basegfx::B2DVector(fStepX, 0.0)).getLength()); + double fViewStepY((rViewInformation.getObjectToViewTransformation() * basegfx::B2DVector(0.0, fStepY)).getLength()); + double fSmallStepX(1.0), fViewSmallStepX(1.0), fSmallStepY(1.0), fViewSmallStepY(1.0); + sal_uInt32 nSmallStepsX(0), nSmallStepsY(0); + + // setup subdivisions + if(getSubdivisionsX()) + { + fSmallStepX = fStepX / getSubdivisionsX(); + fViewSmallStepX = fViewStepX / getSubdivisionsX(); + } + + if(getSubdivisionsY()) + { + fSmallStepY = fStepY / getSubdivisionsY(); + fViewSmallStepY = fViewStepY / getSubdivisionsY(); + } + + // correct step width + while(fViewStepX < getSmallestViewDistance()) + { + fViewStepX *= 2.0; + fStepX *= 2.0; + } + + while(fViewStepY < getSmallestViewDistance()) + { + fViewStepY *= 2.0; + fStepY *= 2.0; + } + + // correct small step width + if(getSubdivisionsX()) + { + while(fViewSmallStepX < getSmallestSubdivisionViewDistance()) + { + fViewSmallStepX *= 2.0; + fSmallStepX *= 2.0; + } + + nSmallStepsX = static_cast<sal_uInt32>(fStepX / fSmallStepX); + } + + if(getSubdivisionsY()) + { + while(fViewSmallStepY < getSmallestSubdivisionViewDistance()) + { + fViewSmallStepY *= 2.0; + fSmallStepY *= 2.0; + } + + nSmallStepsY = static_cast<sal_uInt32>(fStepY / fSmallStepY); + } + + // calculate extended viewport in which grid points may lie at all + basegfx::B2DRange aExtendedViewport; + + if(rViewInformation.getDiscreteViewport().isEmpty()) + { + // not set, use logic size to travel over all potential grid points + aExtendedViewport = basegfx::B2DRange(0.0, 0.0, aScale.getX(), aScale.getY()); + } + else + { + // transform unit range to discrete view + aExtendedViewport = basegfx::B2DRange(0.0, 0.0, 1.0, 1.0); + basegfx::B2DHomMatrix aTrans(rViewInformation.getObjectToViewTransformation() * getTransform()); + aExtendedViewport.transform(aTrans); + + // intersect with visible part + aExtendedViewport.intersect(rViewInformation.getDiscreteViewport()); + + if(!aExtendedViewport.isEmpty()) + { + // convert back and apply scale + aTrans.invert(); + aTrans.scale(aScale.getX(), aScale.getY()); + aExtendedViewport.transform(aTrans); + + // crop start/end in X/Y to multiples of logical step width + const double fHalfCrossSize((rViewInformation.getInverseObjectToViewTransformation() * basegfx::B2DVector(3.0, 0.0)).getLength()); + const double fMinX(floor((aExtendedViewport.getMinX() - fHalfCrossSize) / fStepX) * fStepX); + const double fMaxX(ceil((aExtendedViewport.getMaxX() + fHalfCrossSize) / fStepX) * fStepX); + const double fMinY(floor((aExtendedViewport.getMinY() - fHalfCrossSize) / fStepY) * fStepY); + const double fMaxY(ceil((aExtendedViewport.getMaxY() + fHalfCrossSize) / fStepY) * fStepY); + + // put to aExtendedViewport and crop on object logic size + aExtendedViewport = basegfx::B2DRange( + std::max(fMinX, 0.0), + std::max(fMinY, 0.0), + std::min(fMaxX, aScale.getX()), + std::min(fMaxY, aScale.getY())); + } + } + + if(aExtendedViewport.isEmpty()) + return; + + // prepare point vectors for point and cross markers + std::vector< basegfx::B2DPoint > aPositionsPoint; + std::vector< basegfx::B2DPoint > aPositionsCross; + + for(double fX(aExtendedViewport.getMinX()); fX < aExtendedViewport.getMaxX(); fX += fStepX) + { + const bool bXZero(basegfx::fTools::equalZero(fX)); + + for(double fY(aExtendedViewport.getMinY()); fY < aExtendedViewport.getMaxY(); fY += fStepY) + { + const bool bYZero(basegfx::fTools::equalZero(fY)); + + if(!bXZero && !bYZero) + { + // get discrete position and test against 3x3 area surrounding it + // since it's a cross + const double fHalfCrossSize(3.0 * 0.5); + const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fX, fY)); + const basegfx::B2DRange aDiscreteRangeCross( + aViewPos.getX() - fHalfCrossSize, aViewPos.getY() - fHalfCrossSize, + aViewPos.getX() + fHalfCrossSize, aViewPos.getY() + fHalfCrossSize); + + if(rViewInformation.getDiscreteViewport().overlaps(aDiscreteRangeCross)) + { + const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos); + aPositionsCross.push_back(aLogicPos); + } + } + + if(getSubdivisionsX() && !bYZero) + { + double fF(fX + fSmallStepX); + + for(sal_uInt32 a(1); a < nSmallStepsX && fF < aExtendedViewport.getMaxX(); a++, fF += fSmallStepX) + { + const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fF, fY)); + + if(rViewInformation.getDiscreteViewport().isInside(aViewPos)) + { + const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos); + aPositionsPoint.push_back(aLogicPos); + } + } + } + + if(getSubdivisionsY() && !bXZero) + { + double fF(fY + fSmallStepY); + + for(sal_uInt32 a(1); a < nSmallStepsY && fF < aExtendedViewport.getMaxY(); a++, fF += fSmallStepY) + { + const basegfx::B2DPoint aViewPos(aRST * basegfx::B2DPoint(fX, fF)); + + if(rViewInformation.getDiscreteViewport().isInside(aViewPos)) + { + const basegfx::B2DPoint aLogicPos(rViewInformation.getInverseObjectToViewTransformation() * aViewPos); + aPositionsPoint.push_back(aLogicPos); + } + } + } + } + } + + // prepare return value + const sal_uInt32 nCountPoint(aPositionsPoint.size()); + const sal_uInt32 nCountCross(aPositionsCross.size()); + + // add PointArrayPrimitive2D if point markers were added + if(nCountPoint) + { + rContainer.push_back(new PointArrayPrimitive2D(std::move(aPositionsPoint), getBColor())); + } + + // add MarkerArrayPrimitive2D if cross markers were added + if(!nCountCross) + return; + + if(!getSubdivisionsX() && !getSubdivisionsY()) + { + // no subdivisions, so fall back to points at grid positions, no need to + // visualize a difference between divisions and sub-divisions + rContainer.push_back(new PointArrayPrimitive2D(std::move(aPositionsCross), getBColor())); + } + else + { + rContainer.push_back(new MarkerArrayPrimitive2D(std::move(aPositionsCross), getCrossMarker())); + } + } + + GridPrimitive2D::GridPrimitive2D( + const basegfx::B2DHomMatrix& rTransform, + double fWidth, + double fHeight, + double fSmallestViewDistance, + double fSmallestSubdivisionViewDistance, + sal_uInt32 nSubdivisionsX, + sal_uInt32 nSubdivisionsY, + const basegfx::BColor& rBColor, + const BitmapEx& rCrossMarker) + : maTransform(rTransform), + mfWidth(fWidth), + mfHeight(fHeight), + mfSmallestViewDistance(fSmallestViewDistance), + mfSmallestSubdivisionViewDistance(fSmallestSubdivisionViewDistance), + mnSubdivisionsX(nSubdivisionsX), + mnSubdivisionsY(nSubdivisionsY), + maBColor(rBColor), + maCrossMarker(rCrossMarker) + { + } + + bool GridPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const + { + if(BufferedDecompositionPrimitive2D::operator==(rPrimitive)) + { + const GridPrimitive2D& rCompare = static_cast<const GridPrimitive2D&>(rPrimitive); + + return (getTransform() == rCompare.getTransform() + && getWidth() == rCompare.getWidth() + && getHeight() == rCompare.getHeight() + && getSmallestViewDistance() == rCompare.getSmallestViewDistance() + && getSmallestSubdivisionViewDistance() == rCompare.getSmallestSubdivisionViewDistance() + && getSubdivisionsX() == rCompare.getSubdivisionsX() + && getSubdivisionsY() == rCompare.getSubdivisionsY() + && getBColor() == rCompare.getBColor() + && getCrossMarker() == rCompare.getCrossMarker()); + } + + return false; + } + + basegfx::B2DRange GridPrimitive2D::getB2DRange(const geometry::ViewInformation2D& rViewInformation) const + { + // get object's range + basegfx::B2DRange aUnitRange(0.0, 0.0, 1.0, 1.0); + aUnitRange.transform(getTransform()); + + // intersect with visible part + aUnitRange.intersect(rViewInformation.getViewport()); + + return aUnitRange; + } + + void GridPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const + { + if(!getBuffered2DDecomposition().empty()) + { + if(maLastViewport != rViewInformation.getViewport() || maLastObjectToViewTransformation != rViewInformation.getObjectToViewTransformation()) + { + // conditions of last local decomposition have changed, delete + const_cast< GridPrimitive2D* >(this)->setBuffered2DDecomposition(Primitive2DContainer()); + } + } + + if(getBuffered2DDecomposition().empty()) + { + // remember ViewRange and ViewTransformation + const_cast< GridPrimitive2D* >(this)->maLastObjectToViewTransformation = rViewInformation.getObjectToViewTransformation(); + const_cast< GridPrimitive2D* >(this)->maLastViewport = rViewInformation.getViewport(); + } + + // use parent implementation + BufferedDecompositionPrimitive2D::get2DDecomposition(rVisitor, rViewInformation); + } + + // provide unique ID + sal_uInt32 GridPrimitive2D::getPrimitive2DID() const + { + return PRIMITIVE2D_ID_GRIDPRIMITIVE2D; + } + +} // end of namespace + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |