Matrix3.hxx

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/* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
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 */
 
#pragma once
 
#include <vcl/dllapi.h>
#include <basegfx/point/b2dpoint.hxx>
#include <tools/gen.hxx>
 
namespace vcl::pdf
{
// matrix helper class
// TODO: use basegfx matrix class instead or derive from it
 
/*  for sparse matrices of the form (2D linear transformations)
 *  f[0] f[1] 0
 *  f[2] f[3] 0
 *  f[4] f[5] 1
 */
class Matrix3
{
    double f[6];
 
    void set(const double* pn)
    {
        for (int i = 0; i < 6; i++)
            f[i] = pn[i];
    }
 
public:
    Matrix3();
 
    void skew(double alpha, double beta);
    void scale(double sx, double sy);
    void rotate(double angle);
    void translate(double tx, double ty);
    void invert();
 
    double get(size_t i) const { return f[i]; }
 
    Point transform(const Point& rPoint) const;
    basegfx::B2DPoint transform(const basegfx::B2DPoint& rPoint) const;
};
}
 
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