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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/groupprimitive2d.hxx>
namespace drawinglayer::primitive2d
{
/** TransparencePrimitive2D class
This is the basic primitive for applying freely defined transparence
to freely defined content. The basic idea is to associate a content
which is defined as a sequence of primitives and hold as child content
in the GroupPrimitive2D with a transparence channel also defined as a sequence
of primitives and hold in the transparence member.
The basic definition is to use the transparence content as transparence-Mask by
interpreting the transparence-content not as RGB, but as Luminance transparence mask
using the common RGB_to_luminance definition as e.g. used by VCL.
The defining geometry is the Range of the child primitive sequence,
this means the renderers will/shall use this geometric information for
rendering, not the transparent one. The transparent one should/will be clipped
accordingly.
*/
class DRAWINGLAYER_DLLPUBLIC TransparencePrimitive2D final : public GroupPrimitive2D
{
private:
/// The transparence-Mask who's RGB-Values are interpreted as Luminance
Primitive2DContainer maTransparence;
public:
/** constructor
@param rChildren
The content which is defined to have a transparency. The
range of this primitive is defined by this content
@param rTransparence
The definition of the Transparence-channel for this primitive. It
will be interpreted as mask by interpreting as gray values
using the common RGB_to_luminance definitions
*/
TransparencePrimitive2D(
const Primitive2DContainer& rChildren,
const Primitive2DContainer& rTransparence);
/// data read access
const Primitive2DContainer& getTransparence() const { return maTransparence; }
/// compare operator
virtual bool operator==(const BasePrimitive2D& rPrimitive) 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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