1 files changed, 85 insertions, 0 deletions
diff --git a/include/drawinglayer/primitive2d/shadowprimitive2d.hxx b/include/drawinglayer/primitive2d/shadowprimitive2d.hxx
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+++ b/include/drawinglayer/primitive2d/shadowprimitive2d.hxx
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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>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <basegfx/color/bcolor.hxx>
+
+
+namespace drawinglayer::primitive2d
+{
+        /** ShadowPrimitive2D class
+
+            This primitive defines a generic shadow geometry construction
+            for 2D objects. It decomposes to a TransformPrimitive2D embedded
+            into a ModifiedColorPrimitive2D.
+
+            It's for primitive usage convenience, so that not everyone has
+            to implement the generic shadow construction by himself.
+
+            The same geometry as sequence of primitives is used as geometry and
+            as shadow. Since these are RefCounted Uno-Api objects, no extra objects
+            are needed for the shadow itself; all the local decompositions of the
+            original geometry can be reused from the renderer for shadow visualisation.
+        */
+        class DRAWINGLAYER_DLLPUBLIC ShadowPrimitive2D final : public GroupPrimitive2D
+        {
+        private:
+            /// the shadow transformation, normally just an offset
+            basegfx::B2DHomMatrix                   maShadowTransform;
+
+            /// the shadow color to which all geometry is to be forced
+            basegfx::BColor                         maShadowColor;
+
+            /// the blur radius of the shadow
+            double mfShadowBlur;
+
+
+    public:
+            /// constructor
+            ShadowPrimitive2D(
+                const basegfx::B2DHomMatrix& rShadowTransform,
+                const basegfx::BColor& rShadowColor,
+                double fShadowBlur,
+                Primitive2DContainer&& aChildren);
+
+            /// data read access
+            const basegfx::B2DHomMatrix& getShadowTransform() const { return maShadowTransform; }
+            const basegfx::BColor& getShadowColor() const { return maShadowColor; }
+            double getShadowBlur() const { return mfShadowBlur; }
+            /// compare operator
+            virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
+
+            /// get range
+            virtual basegfx::B2DRange getB2DRange(const geometry::ViewInformation2D& rViewInformation) const override;
+
+            ///  create decomposition
+            virtual void get2DDecomposition(Primitive2DDecompositionVisitor& rVisitor, 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: */