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Diffstat (limited to 'drawinglayer/source/primitive2d/cropprimitive2d.cxx')
| -rw-r--r-- | drawinglayer/source/primitive2d/cropprimitive2d.cxx | 196 |
1 files changed, 196 insertions, 0 deletions
diff --git a/drawinglayer/source/primitive2d/cropprimitive2d.cxx b/drawinglayer/source/primitive2d/cropprimitive2d.cxx new file mode 100644 index 000000000000..9ce8f82f0b77 --- /dev/null +++ b/drawinglayer/source/primitive2d/cropprimitive2d.cxx @@ -0,0 +1,196 @@ +/* -*- 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/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/b2dpolygon.hxx> +#include <basegfx/polygon/b2dpolygontools.hxx> +#include <drawinglayer/primitive2d/maskprimitive2d.hxx> + +////////////////////////////////////////////////////////////////////////////// + +using namespace com::sun::star; + +////////////////////////////////////////////////////////////////////////////// + +namespace drawinglayer +{ + namespace primitive2d + { + CropPrimitive2D::CropPrimitive2D( + const Primitive2DSequence& 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; + } + + Primitive2DSequence CropPrimitive2D::get2DDecomposition(const geometry::ViewInformation2D& /*rViewInformation*/) const + { + Primitive2DSequence xRetval; + + if(getChildren().hasElements()) + { + // decompose to have current translate and scale + basegfx::B2DVector aScale, aTranslate; + double fRotate, fShearX; + + getTransformation().decompose(aScale, aTranslate, fRotate, fShearX); + + // detect 180 degree rotation, this is the same as mirrored in X and Y, + // thus change to mirroring. Prefer mirroring here. Use the equal call + // with getSmallValue here, the original which uses rtl::math::approxEqual + // is too correct here. Maybe this changes with enhanced precision in aw080 + // to the better so that this can be reduced to the more precise call again + if(basegfx::fTools::equal(fRotate, F_PI, 0.000000001)) + { + aScale.setX(aScale.getX() * -1.0); + aScale.setY(aScale.getY() * -1.0); + fRotate = 0.0; + } + + // create target translate and scale + const bool bMirroredX(aScale.getX() < 0.0); + const bool bMirroredY(aScale.getY() < 0.0); + basegfx::B2DVector aTargetScale(aScale); + basegfx::B2DVector aTargetTranslate(aTranslate); + + if(bMirroredX) + { + aTargetTranslate.setX(aTargetTranslate.getX() + getCropRight()); + aTargetScale.setX(aTargetScale.getX() - getCropLeft() - getCropRight()); + } + else + { + aTargetTranslate.setX(aTargetTranslate.getX() - getCropLeft()); + aTargetScale.setX(aTargetScale.getX() + getCropRight() + getCropLeft()); + } + + if(bMirroredY) + { + aTargetTranslate.setY(aTargetTranslate.getY() + getCropBottom()); + aTargetScale.setY(aTargetScale.getY() - getCropTop() - getCropBottom()); + } + else + { + aTargetTranslate.setY(aTargetTranslate.getY() - getCropTop()); + aTargetScale.setY(aTargetScale.getY() + getCropBottom() + getCropTop()); + } + + // create ranges to make comparisons + const basegfx::B2DRange aCurrent( + aTranslate.getX(), aTranslate.getY(), + aTranslate.getX() + aScale.getX(), aTranslate.getY() + aScale.getY()); + const basegfx::B2DRange aCropped( + aTargetTranslate.getX(), aTargetTranslate.getY(), + aTargetTranslate.getX() + aTargetScale.getX(), aTargetTranslate.getY() + aTargetScale.getY()); + + if(aCropped.isEmpty()) + { + // nothing to return since cropped content is completely empty + } + else if(aCurrent.equal(aCropped)) + { + // no crop, just use content + xRetval = getChildren(); + } + else + { + // build new combined content transformation + basegfx::B2DHomMatrix aNewObjectTransform(getTransformation()); + + // remove content transform by inverting + aNewObjectTransform.invert(); + + // add target values and original shear/rotate + aNewObjectTransform = basegfx::tools::createScaleShearXRotateTranslateB2DHomMatrix( + aTargetScale.getX(), + aTargetScale.getY(), + fShearX, + fRotate, + aTargetTranslate.getX(), + aTargetTranslate.getY()) + * aNewObjectTransform; + + // prepare TransformPrimitive2D with xPrimitive + const Primitive2DReference xTransformPrimitive( + new TransformPrimitive2D( + aNewObjectTransform, + getChildren())); + + if(aCurrent.isInside(aCropped)) + { + // crop just shrunk so that its inside content, + // no need to use a mask since not really cropped. + xRetval = Primitive2DSequence(&xTransformPrimitive, 1); + } + else + { + // mask with original object's bounds + basegfx::B2DPolyPolygon aMaskPolyPolygon(basegfx::tools::createUnitPolygon()); + aMaskPolyPolygon.transform(getTransformation()); + + // create maskPrimitive with aMaskPolyPolygon and aMaskContentVector + const Primitive2DReference xMask( + new MaskPrimitive2D( + aMaskPolyPolygon, + Primitive2DSequence(&xTransformPrimitive, 1))); + + xRetval = Primitive2DSequence(&xMask, 1); + } + } + } + + return xRetval; + } + + // provide unique ID + ImplPrimitrive2DIDBlock(CropPrimitive2D, PRIMITIVE2D_ID_CROPPRIMITIVE2D) + + } // end of namespace primitive2d +} // end of namespace drawinglayer + +/* vim:set shiftwidth=4 softtabstop=4 expandtab: */ |