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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 <sal/config.h>
#include <ostream>
#include <sal/types.h>
#include <basegfx/basegfxdllapi.h>
#include <array>
namespace basegfx
{
class B2DTuple;
class SAL_WARN_UNUSED BASEGFX_DLLPUBLIC B2DHomMatrix
{
private:
// Since this is a graphics matrix, the last row is always 0 0 1, so we don't bother to store it.
std::array<std::array<double, 3>, 2> mfValues {
std::array<double, 3>{ 1.0, 0.0, 0.0 },
std::array<double, 3>{ 0.0, 1.0, 0.0 } };
public:
constexpr B2DHomMatrix() = default;
/** constructor to allow setting all needed values for a 3x2 matrix at once. The
parameter f_0x1 e.g. is the same as using set(0, 1, f)
*/
constexpr B2DHomMatrix(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2)
{
mfValues[0][0] = f_0x0;
mfValues[0][1] = f_0x1;
mfValues[0][2] = f_0x2;
mfValues[1][0] = f_1x0;
mfValues[1][1] = f_1x1;
mfValues[1][2] = f_1x2;
}
/** Convenience creator for declaration of the matrix that is commonly
used by web standards (SVG, CSS, HTML).
Values a,b,c,d,e,f represent the following values in the matrix:
[a,c,e] [a,c,e]
[b,d,f] or [b,d,f]
[0,0,1]
*/
static B2DHomMatrix abcdef(double da, double db, double dc, double dd, double de, double df)
{
return B2DHomMatrix(da, dc, de, db, dd, df);
}
// Convenience accessor for value at 0,0 position in the matrix
double a() const { return get(0,0); }
// Convenience accessor for value at 1,0 position in the matrix
double b() const { return get(1,0); }
// Convenience accessor for value at 0,1 position in the matrix
double c() const { return get(0,1); }
// Convenience accessor for value at 1,1 position in the matrix
double d() const { return get(1,1); }
// Convenience accessor for value at 0,2 position in the matrix
double e() const { return get(0,2); }
// Convenience accessor for value at 1,2 position in the matrix
double f() const { return get(1,2); }
double get(sal_uInt16 nRow, sal_uInt16 nColumn) const
{
return mfValues[nRow][nColumn];
}
void set(sal_uInt16 nRow, sal_uInt16 nColumn, double fValue)
{
mfValues[nRow][nColumn] = fValue;
}
/** allow setting all needed values for a 3x2 matrix in one call. The
parameter f_0x1 e.g. is the same as using set(0, 1, f)
*/
void set3x2(double f_0x0, double f_0x1, double f_0x2, double f_1x0, double f_1x1, double f_1x2);
// reset to a standard matrix
bool isIdentity() const;
void identity();
bool isInvertible() const;
bool invert();
void rotate(double fRadiant);
void translate(double fX, double fY);
void translate(const B2DTuple& rTuple);
void scale(double fX, double fY);
void scale(const B2DTuple& rTuple);
// Shearing-Matrices
void shearX(double fSx);
void shearY(double fSy);
bool operator==(const B2DHomMatrix& rMat) const;
bool operator!=(const B2DHomMatrix& rMat) const;
// matrix multiplication from the left to the local
B2DHomMatrix& operator*=(const B2DHomMatrix& rMat);
/**
* Help routine to decompose given homogen 3x3 matrix to components. A correction of the
* components is done to avoid inaccuracies.
*
* See basegfx::utils::createScaleShearXRotateTranslateB2DHomMatrix() for the opposite, to
* compose a homogen 3x3 matrix from components.
*/
bool decompose(B2DTuple& rScale, B2DTuple& rTranslate, double& rRotate, double& rShearX) const;
private:
void computeAdjoint(double (&dst)[6]) const;
double computeDeterminant(double (&dst)[6]) const;
void doMulMatrix(const B2DHomMatrix& rMat);
};
inline B2DHomMatrix operator*(const B2DHomMatrix& rMatA, const B2DHomMatrix& rMatB)
{
B2DHomMatrix aMul(rMatB);
aMul *= rMatA;
return aMul;
}
template<typename charT, typename traits>
std::basic_ostream<charT, traits> & operator <<(
std::basic_ostream<charT, traits> & stream, B2DHomMatrix const & matrix)
{
return stream
<< '[' << matrix.get(0, 0) << ' ' << matrix.get(0, 1) << ' '
<< matrix.get(0, 2) << "; " << matrix.get(1, 0) << ' '
<< matrix.get(1, 1) << ' ' << matrix.get(1, 2) << ']';
}
} // end of namespace basegfx
/* vim:set shiftwidth=4 softtabstop=4 expandtab: */
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