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| -rw-r--r-- | include/drawinglayer/primitive2d/svggradientprimitive2d.hxx | 369 |
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..46bda6307 --- /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/baseprimitive2d.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, + const Primitive2DContainer& rTargetColor, + const Primitive2DContainer& rTargetOpacity, + 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, + const 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, + const 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, + const 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: */ |