1 files changed, 105 insertions, 0 deletions
diff --git a/include/drawinglayer/primitive2d/fillgradientprimitive2d.hxx b/include/drawinglayer/primitive2d/fillgradientprimitive2d.hxx
new file mode 100644
index 0000000000..ffdf874fa9
--- /dev/null
+++ b/include/drawinglayer/primitive2d/fillgradientprimitive2d.hxx
@@ -0,0 +1,105 @@
+/* -*- 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/BufferedDecompositionPrimitive2D.hxx>
+#include <drawinglayer/attribute/fillgradientattribute.hxx>
+
+
+// predefines
+
+namespace basegfx { class B2DPolygon; }
+
+
+// FillGradientPrimitive2D class
+
+namespace drawinglayer::primitive2d
+{
+        /** FillGradientPrimitive2D class
+
+            This class defines a gradient filling for a rectangular area. The
+            Range is defined by the Transformation, the gradient by the FillGradientAttribute.
+
+            The decomposition will deliver the decomposed gradient, e.g. for an ellipse
+            gradient the various ellipses in various color steps will be created.
+
+            I have added functionality to create both versions of filled decompositions:
+            Those who overlap and non-overlapping ones. The overlapping version is the
+            default one since it works with and without AntiAliasing. The non-overlapping
+            version is used in the MetafilePrimitive2D decomposition when the old XOR
+            paint was recorded.
+         */
+        class DRAWINGLAYER_DLLPUBLIC FillGradientPrimitive2D : public BufferedDecompositionPrimitive2D
+        {
+        private:
+            /// the geometrically visible area
+            basegfx::B2DRange                       maOutputRange;
+
+            /// the area the gradient definition is based on
+            /// in the simplest case identical to OutputRange
+            basegfx::B2DRange                       maDefinitionRange;
+
+            /// the gradient definition
+            attribute::FillGradientAttribute        maFillGradient;
+
+
+        protected:
+            /// local helper
+            void createFill(Primitive2DContainer& rContainer, bool bOverlapping) const;
+
+            /// local decomposition.
+            virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+        public:
+            /// helpers that support e.g. direct paint/geometry creation
+            basegfx::B2DPolygon getUnitPolygon() const;
+            basegfx::BColor getOuterColor() const;
+            void generateMatricesAndColors(
+                std::function<void(const basegfx::B2DHomMatrix& rMatrix, const basegfx::BColor& rColor)> aCallback) const;
+
+            /// constructors. The one without definition range will use output range as definition range
+            FillGradientPrimitive2D(
+                const basegfx::B2DRange& rOutputRange,
+                attribute::FillGradientAttribute aFillGradient);
+            FillGradientPrimitive2D(
+                const basegfx::B2DRange& rOutputRange,
+                const basegfx::B2DRange& rDefinitionRange,
+                attribute::FillGradientAttribute aFillGradient);
+
+            /// data read access
+            const basegfx::B2DRange& getOutputRange() const { return maOutputRange; }
+            const basegfx::B2DRange& getDefinitionRange() const { return maDefinitionRange; }
+            const attribute::FillGradientAttribute& getFillGradient() const { return maFillGradient; }
+
+            /// 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: */