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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 .
*/
#pragma once
#include <drawinglayer/drawinglayerdllapi.h>
#include <drawinglayer/primitive2d/BufferedDecompositionGroupPrimitive2D.hxx>
#include <basegfx/color/bcolor.hxx>
#include <basegfx/matrix/b2dhommatrix.hxx>
namespace drawinglayer::primitive2d
{
/** ShadowPrimitive2D class
This primitive defines a generic shadow geometry construction
for 2D objects. It decomposes to a TransformPrimitive2D embedded
into a ModifiedColorPrimitive2D.
It's for primitive usage convenience, so that not everyone has
to implement the generic shadow construction by himself.
The same geometry as sequence of primitives is used as geometry and
as shadow. Since these are RefCounted Uno-Api objects, no extra objects
are needed for the shadow itself; all the local decompositions of the
original geometry can be reused from the renderer for shadow visualisation.
*/
class DRAWINGLAYER_DLLPUBLIC ShadowPrimitive2D final : public BufferedDecompositionGroupPrimitive2D
{
private:
/// the shadow transformation, normally just an offset
basegfx::B2DHomMatrix maShadowTransform;
/// the shadow color to which all geometry is to be forced
basegfx::BColor maShadowColor;
/// the blur radius of the shadow
double mfShadowBlur;
/// last used DiscreteBlurRadius and ClippedRange
double mfLastDiscreteBlurRadius;
basegfx::B2DRange maLastClippedRange;
/// helpers
void getFullyEmbeddedShadowPrimitives(Primitive2DContainer& rContainer) const;
bool prepareValuesAndcheckValidity(basegfx::B2DRange& rRange, basegfx::B2DRange& rClippedRange,
basegfx::B2DVector& rDiscreteSize,
double& rfDiscreteBlurRadius,
const geometry::ViewInformation2D& rViewInformation) const;
protected:
/** method which is to be used to implement the local decomposition of a 2D primitive. */
virtual void
create2DDecomposition(Primitive2DContainer& rContainer,
const geometry::ViewInformation2D& rViewInformation) const override;
public:
/// constructor
ShadowPrimitive2D(basegfx::B2DHomMatrix aShadowTransform, const basegfx::BColor& rShadowColor,
double fShadowBlur, Primitive2DContainer&& aChildren);
/// data read access
const basegfx::B2DHomMatrix& getShadowTransform() const { return maShadowTransform; }
const basegfx::BColor& getShadowColor() const { return maShadowColor; }
double getShadowBlur() const { return mfShadowBlur; }
/// compare operator
virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
/// get range
virtual basegfx::B2DRange
getB2DRange(const geometry::ViewInformation2D& rViewInformation) const override;
/// create decomposition
virtual void
get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor,
const geometry::ViewInformation2D& rViewInformation) const override;
/// provide unique ID
virtual sal_uInt32 getPrimitive2DID() const override;
};
} // end of namespace drawinglayer::primitive2d
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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