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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/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: */
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