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| -rw-r--r-- | drawinglayer/source/primitive2d/cropprimitive2d.cxx | 152 |
1 files changed, 152 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/cropprimitive2d.cxx b/drawinglayer/source/primitive2d/cropprimitive2d.cxx new file mode 100644 index 000000000..2d780ac26 --- /dev/null +++ b/drawinglayer/source/primitive2d/cropprimitive2d.cxx @@ -0,0 +1,152 @@ +/* -*- 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 <primitive2d/cropprimitive2d.hxx> +#include <drawinglayer/primitive2d/drawinglayer_primitivetypes2d.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> +#include <basegfx/matrix/b2dhommatrixtools.hxx> +#include <drawinglayer/primitive2d/transformprimitive2d.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> + + +using namespace com::sun::star; + + +namespace drawinglayer::primitive2d +{ + CropPrimitive2D::CropPrimitive2D( + const Primitive2DContainer& rChildren, + const basegfx::B2DHomMatrix& rTransformation, + double fCropLeft, + double fCropTop, + double fCropRight, + double fCropBottom) + : GroupPrimitive2D(rChildren), + maTransformation(rTransformation), + mfCropLeft(fCropLeft), + mfCropTop(fCropTop), + mfCropRight(fCropRight), + mfCropBottom(fCropBottom) + { + } + + bool CropPrimitive2D::operator==(const BasePrimitive2D& rPrimitive) const + { + if(GroupPrimitive2D::operator==(rPrimitive)) + { + const CropPrimitive2D& rCompare = static_cast< const CropPrimitive2D& >(rPrimitive); + + return (getTransformation() == rCompare.getTransformation() + && getCropLeft() == rCompare.getCropLeft() + && getCropTop() == rCompare.getCropTop() + && getCropRight() == rCompare.getCropRight() + && getCropBottom() == rCompare.getCropBottom()); + } + + return false; + } + + void CropPrimitive2D::get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& /*rViewInformation*/) const + { + if(getChildren().empty()) + return; + + // get original object scale in unit coordinates (no mirroring) + const basegfx::B2DVector aObjectScale(basegfx::absolute(getTransformation() * basegfx::B2DVector(1.0, 1.0))); + + // we handle cropping, so when no width or no height, content will be empty, + // so only do something when we have a width and a height + if(aObjectScale.equalZero()) + return; + + // calculate crop distances in unit coordinates. They are already combined with CropScaleFactor, thus + // are relative only to object scale + const double fBackScaleX(basegfx::fTools::equalZero(aObjectScale.getX()) ? 1.0 : 1.0 / fabs(aObjectScale.getX())); + const double fBackScaleY(basegfx::fTools::equalZero(aObjectScale.getY()) ? 1.0 : 1.0 / fabs(aObjectScale.getY())); + const double fLeft(getCropLeft() * fBackScaleX); + const double fTop(getCropTop() * fBackScaleY); + const double fRight(getCropRight() * fBackScaleX); + const double fBottom(getCropBottom() * fBackScaleY); + + // calc new unit range for comparisons; the original range is the unit range + const basegfx::B2DRange aUnitRange(0.0, 0.0, 1.0, 1.0); + const basegfx::B2DRange aNewRange( + -fLeft, + -fTop, + 1.0 + fRight, + 1.0 + fBottom); + + // if we have no overlap the crop has removed everything, so we do only + // have to create content if this is not the case + if(!aNewRange.overlaps(aUnitRange)) + return; + + // create new transform; first take out old transform to get + // to unit coordinates by inverting. Inverting should be flawless + // since we already checked that object size is not zero in X or Y + basegfx::B2DHomMatrix aNewTransform(getTransformation()); + + aNewTransform.invert(); + + // apply crop enlargement in unit coordinates + aNewTransform = basegfx::utils::createScaleTranslateB2DHomMatrix( + aNewRange.getRange(), + aNewRange.getMinimum()) * aNewTransform; + + // apply original transformation. Since we have manipulated the crop + // in unit coordinates we do not need to care about mirroring or + // a corrected point for a possible shear or rotation, this all comes for + // free + aNewTransform = getTransformation() * aNewTransform; + + // prepare TransformPrimitive2D with xPrimitive + const Primitive2DReference xTransformPrimitive( + new TransformPrimitive2D( + aNewTransform, + getChildren())); + + if(aUnitRange.isInside(aNewRange)) + { + // the new range is completely inside the old range (unit range), + // so no masking is needed + rVisitor.append(xTransformPrimitive); + } + else + { + // mask with original object's bounds + basegfx::B2DPolyPolygon aMaskPolyPolygon(basegfx::utils::createUnitPolygon()); + aMaskPolyPolygon.transform(getTransformation()); + + // create maskPrimitive with aMaskPolyPolygon and aMaskContentVector + const Primitive2DReference xMask( + new MaskPrimitive2D( + aMaskPolyPolygon, + Primitive2DContainer { xTransformPrimitive })); + + rVisitor.append(xMask); + } + } + + // provide unique ID + ImplPrimitive2DIDBlock(CropPrimitive2D, PRIMITIVE2D_ID_CROPPRIMITIVE2D) + +} // end of namespace + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |