vcl/inc/pdf/Matrix3.hxx

   1 /* -*- Mode: C++; tab-width: 4; indent-tabs-mode: nil; c-basic-offset: 4 -*- */
   2 /*
   3  * This file is part of the LibreOffice project.
   4  *
   5  * This Source Code Form is subject to the terms of the Mozilla Public
   6  * License, v. 2.0. If a copy of the MPL was not distributed with this
   7  * file, You can obtain one at http://mozilla.org/MPL/2.0/.
   8  *
   9  */
  10
  11 #pragma once
  12
  13 #include <vcl/dllapi.h>
  14 #include <tools/gen.hxx>
  15
  16 namespace vcl::pdf
  17 {
  18 // matrix helper class
  19 // TODO: use basegfx matrix class instead or derive from it
  20
  21 /*  for sparse matrices of the form (2D linear transformations)
  22  *  f[0] f[1] 0
  23  *  f[2] f[3] 0
  24  *  f[4] f[5] 1
  25  */
  26 class Matrix3
  27 {
  28     double f[6];
  29
  30     void set(const double* pn)
  31     {
  32         for (int i = 0; i < 6; i++)
  33             f[i] = pn[i];
  34     }
  35
  36 public:
  37     Matrix3();
  38
  39     void skew(double alpha, double beta);
  40     void scale(double sx, double sy);
  41     void rotate(double angle);
  42     void translate(double tx, double ty);
  43     void invert();
  44
  45     double get(size_t i) const { return f[i]; }
  46
  47     Point transform(const Point& rPoint) const;
  48 };
  49 }
  50
  51 /* vim:set shiftwidth=4 softtabstop=4 expandtab: */