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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 <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: */
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