MathBase.h

// SPDX-FileCopyrightText: 2021 Francesco Pretto <ceztko@gmail.com>
// SPDX-License-Identifier: LGPL-2.0-or-later OR MPL-2.0
 
#ifndef AUX_MATH_BASE_H
#define AUX_MATH_BASE_H
 
namespace PoDoFo
{
    enum class AlgebraicTrait
    {
        Tx, 
        Ty, 
        // TODO: Scale/Rotation traits
    };
 
    constexpr AlgebraicTrait Tx = AlgebraicTrait::Tx;   
    constexpr AlgebraicTrait Ty = AlgebraicTrait::Ty;   
 
    template <AlgebraicTrait>
    struct MatrixTraits;
 
    template <>
    struct MatrixTraits<Tx>
    {
        static double Get(const double m[6])
        {
            return m[4];
        }
 
        static void Set(double m[6], double value)
        {
            m[4] = value;
        }
 
        static void Apply(double m[6], double value)
        {
            m[4] = value * m[0] + m[4];
            m[5] = value * m[1] + m[5];
        }
    };
 
    template <>
    struct MatrixTraits<Ty>
    {
        static double Get(const double m[6])
        {
            return m[5];
        }
 
        static void Set(double m[6], double value)
        {
            m[5] = value;
        }
 
        static void Apply(double m[6], double value)
        {
            m[4] = value * m[2] + m[4];
            m[5] = value * m[3] + m[5];
        }
    };
}
 
#endif // AUX_MATH_BASE_H