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/*************************************************************************
** Matrix.h **
** **
** This file is part of dvisvgm -- the DVI to SVG converter **
** Copyright (C) 2005-2015 Martin Gieseking <martin.gieseking@uos.de> **
** **
** This program is free software; you can redistribute it and/or **
** modify it under the terms of the GNU General Public License as **
** published by the Free Software Foundation; either version 3 of **
** the License, or (at your option) any later version. **
** **
** This program is distributed in the hope that it will be useful, but **
** WITHOUT ANY WARRANTY; without even the implied warranty of **
** MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the **
** GNU General Public License for more details. **
** **
** You should have received a copy of the GNU General Public License **
** along with this program; if not, see <http://www.gnu.org/licenses/>. **
*************************************************************************/
#ifndef DVISVGM_MATRIX_H
#define DVISVGM_MATRIX_H
#include <istream>
#include <string>
#include <vector>
#include "MessageException.h"
#include "Pair.h"
struct ParserException : public MessageException
{
ParserException (const std::string &msg) : MessageException(msg) {}
};
class Calculator;
class Matrix
{
friend double det (const Matrix &m);
friend double det (const Matrix &m, int row, int col);
public:
Matrix (const std::string &cmds, Calculator &calc);
Matrix (double d=0);
Matrix (double v[], unsigned size=9);
Matrix (const std::vector<double> &v, int start=0);
Matrix& set (double d);
Matrix& set (double v[], unsigned size);
Matrix& set (const std::vector<double> &v, int start=0);
Matrix& set (const std::string &cmds, Calculator &calc);
double get (int row, int col) const {return _values[row][col];}
Matrix& transpose ();
Matrix& invert ();
Matrix& parse (std::istream &is, Calculator &c);
Matrix& parse (const std::string &cmds, Calculator &c);
Matrix& lmultiply (const Matrix &tm);
Matrix& rmultiply (const Matrix &tm);
Matrix& translate (double tx, double ty);
Matrix& scale (double sx, double sy);
Matrix& rotate (double deg);
Matrix& xskewByAngle (double deg);
Matrix& yskewByAngle (double deg);
Matrix& xskewByRatio (double xyratio);
Matrix& yskewByRatio (double xyratio);
Matrix& flip (bool h, double a);
Matrix& operator *= (double c);
DPair operator * (const DPair &p) const;
bool operator == (const Matrix &m) const;
bool operator != (const Matrix &m) const;
bool isIdentity() const;
bool isTranslation (double &tx, double &ty) const;
std::string getSVG () const;
std::ostream& write (std::ostream &os) const;
private:
double _values[3][3]; // row x col
};
struct TranslationMatrix : public Matrix
{
TranslationMatrix (double tx, double ty);
};
struct ScalingMatrix : public Matrix
{
ScalingMatrix (double sx, double sy);
};
struct RotationMatrix : public Matrix
{
RotationMatrix (double deg);
};
inline std::ostream& operator << (std::ostream &os, const Matrix &m) {
return m.write(os);
}
double det (const Matrix &m);
double det (const Matrix &m, int row, int col);
#endif
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