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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 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())
{
// 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())
{
// 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))
{
// create new transform; first take out old transform to get
// to unit coordinates by inverting. Inverting should be flawless
// since we already cheched 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 primitive2d
} // end of namespace drawinglayer
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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