1ae7a81e54
by avoiding making multiple copies of the Primitive2D container that we pass to TransformPrimitive2D. Instead, make TransformPrimitive2D store its children using a GroupPrimitive2D, which means we can share the GroupPrimitive2D among all the TransformPrimitive2D instances we create. Change-Id: I8a4398f9db6a6ab013ee24ad53836975fba6f3df Reviewed-on: https://gerrit.libreoffice.org/c/core/+/162951 Tested-by: Jenkins Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>
80 lines
3.3 KiB
C++
80 lines
3.3 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/groupprimitive2d.hxx>
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#include <basegfx/matrix/b2dhommatrix.hxx>
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namespace drawinglayer::primitive2d
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{
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/** TransformPrimitive2D class
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This is one of the basic grouping primitives and it provides
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embedding a sequence of primitives (a geometry) into a
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transformation. All renderers have to handle this, usually by
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building a current transformation stack (linear combination)
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and applying this to all to-be-rendered geometry. If not handling
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this, the output will be mostly wrong since this primitive is
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widely used.
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It does transform by embedding an existing geometry into a
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transformation as Child-content. This allows re-usage of the
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refcounted Uno-Api primitives and their existing, buffered
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decompositions.
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It could e.g. be used to show a single object geometry in 1000
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different, transformed states without the need to create those
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thousand primitive contents.
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*/
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class DRAWINGLAYER_DLLPUBLIC TransformPrimitive2D final : public BasePrimitive2D
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{
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private:
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// the transformation to apply to the child geometry
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basegfx::B2DHomMatrix maTransformation;
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rtl::Reference<GroupPrimitive2D> mxChildren;
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public:
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/// constructor
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TransformPrimitive2D(
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basegfx::B2DHomMatrix aTransformation,
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Primitive2DContainer&& rChildren);
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TransformPrimitive2D(
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basegfx::B2DHomMatrix aTransformation,
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GroupPrimitive2D& rChildren);
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/// data read access
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const Primitive2DContainer& getChildren() const { return mxChildren->getChildren(); }
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const basegfx::B2DHomMatrix& getTransformation() const { return maTransformation; }
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/// compare operator
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virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
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/// get range
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virtual basegfx::B2DRange getB2DRange(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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};
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} // end of namespace drawinglayer::primitive2d
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/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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