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-rw-r--r-- | include/drawinglayer/primitive2d/transformprimitive2d.hxx | 75 |
1 files changed, 75 insertions, 0 deletions
diff --git a/include/drawinglayer/primitive2d/transformprimitive2d.hxx b/include/drawinglayer/primitive2d/transformprimitive2d.hxx new file mode 100644 index 000000000..25549e633 --- /dev/null +++ b/include/drawinglayer/primitive2d/transformprimitive2d.hxx @@ -0,0 +1,75 @@ +/* -*- 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/groupprimitive2d.hxx> +#include <basegfx/matrix/b2dhommatrix.hxx> + + +namespace drawinglayer::primitive2d +{ + /** TransformPrimitive2D class + + This is one of the basic grouping primitives and it provides + embedding a sequence of primitives (a geometry) into a + transformation. All renderers have to handle this, usually by + building a current transformation stack (linear combination) + and applying this to all to-be-rendered geometry. If not handling + this, the output will be mostly wrong since this primitive is + widely used. + + It does transform by embedding an existing geometry into a + transformation as Child-content. This allows re-usage of the + refcounted Uno-Api primitives and their existing, buffered + decompositions. + + It could e.g. be used to show a single object geometry in 1000 + different, transformed states without the need to create those + thousand primitive contents. + */ + class DRAWINGLAYER_DLLPUBLIC TransformPrimitive2D final : public GroupPrimitive2D + { + private: + // the transformation to apply to the child geometry + basegfx::B2DHomMatrix maTransformation; + + public: + /// constructor + TransformPrimitive2D( + const basegfx::B2DHomMatrix& rTransformation, + const Primitive2DContainer& rChildren); + + /// data read access + const basegfx::B2DHomMatrix& getTransformation() const { return maTransformation; } + + /// compare operator + virtual bool operator==(const BasePrimitive2D& rPrimitive) const override; + + /// get range + virtual basegfx::B2DRange getB2DRange(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: */ |