Adding upstream version 4:7.4.7.upstream/4%7.4.7upstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 369 insertions, 0 deletions

diff --git a/include/drawinglayer/primitive2d/svggradientprimitive2d.hxx b/include/drawinglayer/primitive2d/svggradientprimitive2d.hxx
new file mode 100644
index 000000000..66c68fdaf
--- /dev/null
+++ b/include/drawinglayer/primitive2d/svggradientprimitive2d.hxx
@@ -0,0 +1,369 @@
+/* -*- 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 <basegfx/color/bcolor.hxx>
+#include <basegfx/polygon/b2dpolypolygon.hxx>
+#include <basegfx/matrix/b2dhommatrix.hxx>
+#include <drawinglayer/primitive2d/primitivetools2d.hxx>
+#include <vector>
+
+
+// SvgGradientEntry class
+
+namespace drawinglayer::primitive2d
+{
+        /// a single GradientStop defining a color and opacity at a distance
+        class SvgGradientEntry
+        {
+        private:
+            double              mfOffset;
+            basegfx::BColor     maColor;
+            double              mfOpacity;
+
+        public:
+            SvgGradientEntry(double fOffset, const basegfx::BColor& rColor, double fOpacity)
+            :   mfOffset(fOffset),
+                maColor(rColor),
+                mfOpacity(fOpacity)
+            {
+            }
+
+            double getOffset() const { return mfOffset; }
+            const basegfx::BColor& getColor() const { return maColor; }
+            double getOpacity() const { return mfOpacity; }
+
+            bool operator==(const SvgGradientEntry& rCompare) const
+            {
+                return (getOffset() == rCompare.getOffset()
+                    && getColor() == rCompare.getColor()
+                    && getOpacity() == rCompare.getOpacity());
+            }
+
+            bool operator<(const SvgGradientEntry& rCompare) const
+            {
+                return getOffset() < rCompare.getOffset();
+            }
+        };
+
+        typedef ::std::vector< SvgGradientEntry > SvgGradientEntryVector;
+
+        // SvgGradientHelper class
+
+        enum class SpreadMethod
+        {
+            Pad,
+            Reflect,
+            Repeat
+        };
+
+        /*  helper for linear and radial gradient, both get derived from this
+            to share common definitions and functionality
+         **/
+        class SvgGradientHelper
+        {
+        private:
+            /// the extra gradient transform
+            basegfx::B2DHomMatrix       maGradientTransform;
+
+            /// geometric definition, the geometry to be filled
+            basegfx::B2DPolyPolygon     maPolyPolygon;
+
+            /// the gradient definition
+            SvgGradientEntryVector      maGradientEntries;
+
+            // internal helper for case SpreadMethod::Reflect
+            SvgGradientEntryVector      maMirroredGradientEntries;
+
+            /// start and/or center point
+            basegfx::B2DPoint           maStart;
+
+            /// how to spread
+            SpreadMethod                maSpreadMethod;
+
+            bool                        mbPreconditionsChecked : 1;
+            bool                        mbCreatesContent : 1;
+            bool                        mbSingleEntry : 1;
+            bool                        mbFullyOpaque : 1;
+
+            // true = interpret in unit coordinate system -> object aspect ratio will scale result
+            // false = interpret in object coordinate system -> object aspect ratio will not scale result
+            // (related to SVG's gradientUnits (userSpaceOnUse|objectBoundingBox)
+            bool                        mbUseUnitCoordinates : 1;
+
+            /// local helpers
+            const SvgGradientEntryVector& getMirroredGradientEntries() const;
+            void createMirroredGradientEntries();
+            const SvgGradientEntry& FindEntryLessOrEqual(sal_Int32& rInt, const double fFrac) const;
+            const SvgGradientEntry& FindEntryMore(sal_Int32& rInt,const double fFrac) const;
+
+        protected:
+            /// local helpers
+            void createSingleGradientEntryFill(Primitive2DContainer& rContainer) const;
+            virtual void createAtom(
+                Primitive2DContainer& rTargetColor,
+                Primitive2DContainer& rTargetOpacity,
+                const SvgGradientEntry& rFrom,
+                const SvgGradientEntry& rTo,
+                sal_Int32 nOffsetFrom,
+                sal_Int32 nOffsetTo) const = 0;
+            void createRun(
+                Primitive2DContainer& rTargetColor,
+                Primitive2DContainer& rTargetOpacity,
+                double fStart,
+                double fEnd) const;
+            virtual void checkPreconditions();
+            void createResult(
+                Primitive2DContainer& rContainer,
+                Primitive2DContainer aTargetColor,
+                Primitive2DContainer aTargetOpacity,
+                const basegfx::B2DHomMatrix& rUnitGradientToObject,
+                bool bInvert = false) const;
+            bool getCreatesContent() const { return mbCreatesContent; }
+            bool getSingleEntry() const { return mbSingleEntry; }
+            void setSingleEntry() { mbSingleEntry = true; }
+            bool getPreconditionsChecked() const { return mbPreconditionsChecked; }
+            bool getFullyOpaque() const { return mbFullyOpaque; }
+
+        public:
+            /// constructor
+            SvgGradientHelper(
+                const basegfx::B2DHomMatrix& rGradientTransform,
+                const basegfx::B2DPolyPolygon& rPolyPolygon,
+                SvgGradientEntryVector&& rGradientEntries,
+                const basegfx::B2DPoint& rStart,
+                bool bUseUnitCoordinates,
+                SpreadMethod aSpreadMethod);
+            virtual ~SvgGradientHelper();
+
+            /// data read access
+            const basegfx::B2DHomMatrix& getGradientTransform() const { return maGradientTransform; }
+            const basegfx::B2DPolyPolygon& getPolyPolygon() const { return maPolyPolygon; }
+            const SvgGradientEntryVector& getGradientEntries() const { return maGradientEntries; }
+            const basegfx::B2DPoint& getStart() const { return maStart; }
+            bool getUseUnitCoordinates() const { return mbUseUnitCoordinates; }
+            SpreadMethod getSpreadMethod() const { return maSpreadMethod; }
+
+            /// compare operator
+            bool operator==(const SvgGradientHelper& rSvgGradientHelper) const;
+        };
+
+        /// the basic linear gradient primitive
+        class DRAWINGLAYER_DLLPUBLIC SvgLinearGradientPrimitive2D final : public BufferedDecompositionPrimitive2D, public SvgGradientHelper
+        {
+        private:
+            /// the end point for linear gradient
+            basegfx::B2DPoint                       maEnd;
+
+            /// local helpers
+            virtual void createAtom(
+                Primitive2DContainer& rTargetColor,
+                Primitive2DContainer& rTargetOpacity,
+                const SvgGradientEntry& rFrom,
+                const SvgGradientEntry& rTo,
+                sal_Int32 nOffsetFrom,
+                sal_Int32 nOffsetTo) const override;
+            virtual void checkPreconditions() override;
+
+            /// local decomposition.
+            virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+        public:
+            /// constructor
+            SvgLinearGradientPrimitive2D(
+                const basegfx::B2DHomMatrix& rGradientTransform,
+                const basegfx::B2DPolyPolygon& rPolyPolygon,
+                SvgGradientEntryVector&& rGradientEntries,
+                const basegfx::B2DPoint& rStart,
+                const basegfx::B2DPoint& rEnd,
+                bool bUseUnitCoordinates,
+                SpreadMethod aSpreadMethod);
+            virtual ~SvgLinearGradientPrimitive2D() override;
+
+            /// data read access
+            const basegfx::B2DPoint& getEnd() const { return maEnd; }
+
+            /// 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;
+        };
+
+        /// the basic radial gradient primitive
+        class DRAWINGLAYER_DLLPUBLIC SvgRadialGradientPrimitive2D final : public BufferedDecompositionPrimitive2D, public SvgGradientHelper
+        {
+        private:
+            /// the geometric definition
+            double                                  mfRadius;
+
+            /// Focal only used when focal is set at all, see constructors
+            basegfx::B2DPoint                       maFocal;
+            basegfx::B2DVector                      maFocalVector;
+            double                                  maFocalLength;
+
+            bool                                    mbFocalSet : 1;
+
+            /// local helpers
+            virtual void createAtom(
+                Primitive2DContainer& rTargetColor,
+                Primitive2DContainer& rTargetOpacity,
+                const SvgGradientEntry& rFrom,
+                const SvgGradientEntry& rTo,
+                sal_Int32 nOffsetFrom,
+                sal_Int32 nOffsetTo) const override;
+            virtual void checkPreconditions() override;
+
+            /// local decomposition.
+            virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+        public:
+            /// constructor
+            SvgRadialGradientPrimitive2D(
+                const basegfx::B2DHomMatrix& rGradientTransform,
+                const basegfx::B2DPolyPolygon& rPolyPolygon,
+                SvgGradientEntryVector&& rGradientEntries,
+                const basegfx::B2DPoint& rStart,
+                double fRadius,
+                bool bUseUnitCoordinates,
+                SpreadMethod aSpreadMethod,
+                const basegfx::B2DPoint* pFocal);
+            virtual ~SvgRadialGradientPrimitive2D() override;
+
+            /// data read access
+            double getRadius() const { return mfRadius; }
+            const basegfx::B2DPoint& getFocal() const { return maFocal; }
+            bool isFocalSet() const { return mbFocalSet; }
+
+            /// 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;
+        };
+
+        // SvgLinearAtomPrimitive2D class
+
+        /*  basic primitive for a single linear GradientRun in unit coordinates.
+            It's derived from DiscreteMetricDependentPrimitive2D to allow view-dependent
+            decompositions allowing reduced color steps
+         **/
+        class SvgLinearAtomPrimitive2D final : public DiscreteMetricDependentPrimitive2D
+        {
+        private:
+            /// the geometric definition in unit coordinates
+            basegfx::BColor             maColorA;
+            basegfx::BColor             maColorB;
+            double                      mfOffsetA;
+            double                      mfOffsetB;
+
+            /// local decomposition.
+            virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+        public:
+            /// constructor
+            SvgLinearAtomPrimitive2D(
+                const basegfx::BColor& aColorA, double fOffsetA,
+                const basegfx::BColor& aColorB, double fOffsetB);
+
+            /// data read access
+            const basegfx::BColor& getColorA() const { return maColorA; }
+            const basegfx::BColor& getColorB() const { return maColorB; }
+            double getOffsetA() const { return mfOffsetA; }
+            double getOffsetB() const { return mfOffsetB; }
+
+            /// compare operator
+            virtual bool operator==(const BasePrimitive2D& rPrimitive) const override;
+
+            /// provide unique ID
+            virtual sal_uInt32 getPrimitive2DID() const override;
+        };
+
+        // SvgRadialAtomPrimitive2D class
+
+        /*  basic primitive for a single radial GradientRun in unit coordinates.
+            It's derived from DiscreteMetricDependentPrimitive2D to allow view-dependent
+            decompositions allowing reduced color steps
+         **/
+        class SvgRadialAtomPrimitive2D final : public DiscreteMetricDependentPrimitive2D
+        {
+        private:
+            /// the geometric definition in unit coordinates
+            basegfx::BColor             maColorA;
+            basegfx::BColor             maColorB;
+            double                      mfScaleA;
+            double                      mfScaleB;
+
+            // helper to hold translation vectors when given (for focal)
+            struct VectorPair
+            {
+                basegfx::B2DVector          maTranslateA;
+                basegfx::B2DVector          maTranslateB;
+
+                VectorPair(const basegfx::B2DVector& rTranslateA, const basegfx::B2DVector& rTranslateB)
+                :   maTranslateA(rTranslateA),
+                    maTranslateB(rTranslateB)
+                {
+                }
+            };
+
+            /// Only used when focal is set
+            std::unique_ptr<VectorPair> mpTranslate;
+
+            /// local decomposition.
+            virtual void create2DDecomposition(Primitive2DContainer& rContainer, const geometry::ViewInformation2D& rViewInformation) const override;
+
+        public:
+            /// constructor
+            SvgRadialAtomPrimitive2D(
+                const basegfx::BColor& aColorA, double fScaleA, const basegfx::B2DVector& rTranslateA,
+                const basegfx::BColor& aColorB, double fScaleB, const basegfx::B2DVector& rTranslateB);
+            SvgRadialAtomPrimitive2D(
+                const basegfx::BColor& aColorA, double fScaleA,
+                const basegfx::BColor& aColorB, double fScaleB);
+            virtual ~SvgRadialAtomPrimitive2D() override;
+
+            /// data read access
+            const basegfx::BColor& getColorA() const { return maColorA; }
+            const basegfx::BColor& getColorB() const { return maColorB; }
+            double getScaleA() const { return mfScaleA; }
+            double getScaleB() const { return mfScaleB; }
+            bool isTranslateSet() const { return (nullptr != mpTranslate); }
+            basegfx::B2DVector getTranslateA() const { if(mpTranslate) return mpTranslate->maTranslateA; return basegfx::B2DVector(); }
+            basegfx::B2DVector getTranslateB() const { if(mpTranslate) return mpTranslate->maTranslateB; return basegfx::B2DVector(); }
+
+            /// 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: */