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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(
+ Primitive2DContainer&& rChildren,
+ Primitive2DContainer&& aTransparence);
+
+ /// 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: */