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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namespace drawinglayer::primitive2d
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{
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/** TransparencePrimitive2D class
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This is the basic primitive for applying freely defined transparence
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to freely defined content. The basic idea is to associate a content
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which is defined as a sequence of primitives and hold as child content
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in the GroupPrimitive2D with a transparence channel also defined as a sequence
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of primitives and hold in the transparence member.
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The basic definition is to use the transparence content as transparence-Mask by
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interpreting the transparence-content not as RGB, but as Luminance transparence mask
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using the common RGB_to_luminance definition as e.g. used by VCL.
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The defining geometry is the Range of the child primitive sequence,
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this means the renderers will/shall use this geometric information for
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rendering, not the transparent one. The transparent one should/will be clipped
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accordingly.
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*/
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class DRAWINGLAYER_DLLPUBLIC TransparencePrimitive2D final : public GroupPrimitive2D
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{
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private:
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/// The transparence-Mask who's RGB-Values are interpreted as Luminance
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Primitive2DContainer maTransparence;
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public:
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/** constructor
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@param rChildren
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The content which is defined to have a transparency. The
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range of this primitive is defined by this content
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@param rTransparence
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The definition of the Transparence-channel for this primitive. It
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will be interpreted as mask by interpreting as gray values
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using the common RGB_to_luminance definitions
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*/
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TransparencePrimitive2D(
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Primitive2DContainer&& rChildren,
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Primitive2DContainer&& aTransparence);
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/// data read access
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const Primitive2DContainer& getTransparence() const { return maTransparence; }
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/// compare operator
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virtual bool operator==(const BasePrimitive2D& rPrimitive) 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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