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-rw-r--r--drawinglayer/source/primitive2d/cropprimitive2d.cxx155
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diff --git a/drawinglayer/source/primitive2d/cropprimitive2d.cxx b/drawinglayer/source/primitive2d/cropprimitive2d.cxx
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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 <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(
+ Primitive2DContainer&& aChildren,
+ const basegfx::B2DHomMatrix& rTransformation,
+ double fCropLeft,
+ double fCropTop,
+ double fCropRight,
+ double fCropBottom)
+ : GroupPrimitive2D(std::move(aChildren)),
+ 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,
+ Primitive2DContainer(getChildren())));
+
+ if(aUnitRange.isInside(aNewRange))
+ {
+ // the new range is completely inside the old range (unit range),
+ // so no masking is needed
+ rVisitor.visit(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.visit(xMask);
+ }
+ }
+
+ // provide unique ID
+ sal_uInt32 CropPrimitive2D::getPrimitive2DID() const
+ {
+ return PRIMITIVE2D_ID_CROPPRIMITIVE2D;
+ }
+
+} // end of namespace
+
+/* vim:set shiftwidth=4 softtabstop=4 expandtab: */