93 lines
3.9 KiB
C++
93 lines
3.9 KiB
C++
/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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/*
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* This file is part of the LibreOffice project.
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*
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* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/.
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*
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* This file incorporates work covered by the following license notice:
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*
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* Licensed to the Apache Software Foundation (ASF) under one or more
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* contributor license agreements. See the NOTICE file distributed
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* with this work for additional information regarding copyright
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* ownership. The ASF licenses this file to you under the Apache
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* License, Version 2.0 (the "License"); you may not use this file
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* except in compliance with the License. You may obtain a copy of
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* the License at http://www.apache.org/licenses/LICENSE-2.0 .
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*/
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#pragma once
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#include <drawinglayer/drawinglayerdllapi.h>
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#include <drawinglayer/primitive2d/baseprimitive2d.hxx>
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#include <drawinglayer/primitive2d/Primitive2DContainer.hxx>
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// GroupPrimitive2D class
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namespace drawinglayer::primitive2d
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{
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/** GroupPrimitive2D class
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Baseclass for all grouping 2D primitives
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The grouping primitive in its basic form is capable of holding
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a child primitive content and returns it on decomposition on default.
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It is used for two main purposes, but more may apply:
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- to transport extended information, e.g. for text classification,
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see e.g. TextHierarchy*Primitive2D implementations. Since they
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decompose to their child content, renderers not aware/interested
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in that extra information will just ignore these primitives
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- to encapsulate common geometry, e.g. the ShadowPrimitive2D implements
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applying a generic shadow to a child sequence by adding the needed
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offset and color stuff in the decomposition
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In most cases the decomposition is straightforward, so by default
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this primitive will not buffer the result and is not derived from
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BufferedDecompositionPrimitive2D, but from BasePrimitive2D.
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A renderer has to take GroupPrimitive2D derivations into account which
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are used to hold a state.
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Current Basic 2D StatePrimitives are:
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- TransparencePrimitive2D (objects with freely defined transparence)
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- InvertPrimitive2D (for XOR)
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- MaskPrimitive2D (for masking)
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- ModifiedColorPrimitive2D (for a stack of color modifications)
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- TransformPrimitive2D (for a transformation stack)
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*/
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class DRAWINGLAYER_DLLPUBLIC GroupPrimitive2D : public BasePrimitive2D
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{
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private:
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/// the children. Declared private since this shall never be changed at all after construction
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Primitive2DContainer maChildren;
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public:
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/// constructor
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explicit GroupPrimitive2D(Primitive2DContainer&& aChildren);
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/// data read access
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const Primitive2DContainer& getChildren() const { return maChildren; }
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void getChildren(Primitive2DDecompositionVisitor& rVisitor) const { rVisitor.visit(maChildren); }
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/// compare operator
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virtual bool operator==( const BasePrimitive2D& rPrimitive ) const override;
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/// local decomposition. Implementation will just return children
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virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, const geometry::ViewInformation2D& rViewInformation) const override;
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/// provide unique ID
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virtual sal_uInt32 getPrimitive2DID() const override;
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// XAccounting
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virtual sal_Int64 estimateUsage() override final;
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};
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} // end of namespace drawinglayer::primitive2d
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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