valentina/src/libs/ifc/ifcdef.h

/************************************************************************
 **
 **  @file   ifcdef.h
 **  @author Roman Telezhynskyi <dismine(at)gmail.com>
 **  @date   10 12, 2014
 **
 **  @brief
 **  @copyright
 **  This source code is part of the Valentine project, a pattern making
 **  program, whose allow create and modeling patterns of clothing.
 **  Copyright (C) 2013-2015 Valentina project
 **  <https://bitbucket.org/dismine/valentina> All Rights Reserved.
 **
 **  Valentina 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.
 **
 **  Valentina 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 Valentina.  If not, see <http://www.gnu.org/licenses/>.
 **
 *************************************************************************/

#ifndef IFCDEF_H
#define IFCDEF_H

#include <QtGlobal>

#ifdef Q_OS_WIN32
    extern Q_CORE_EXPORT int qt_ntfs_permission_lookup;
    #include <windows.h>
#endif /*Q_OS_WIN32*/

enum class Unit : char { Mm, Cm, Inch, Px };
enum class MeasurementsType : char { Standard, Individual };

static const quint32 null_id = 0;

#define NULL_ID null_id//use this value for initialization variables that keeps id values. 0 mean uknown id value.
#define NULL_ID_STR "0"

// Detect whether the compiler supports C++11 noexcept exception specifications.
#  if   defined(__clang__)
#    if __has_feature(cxx_noexcept)
#      define V_NOEXCEPT_EXPR(x) noexcept(x) // Clang 3.0 and above have noexcept
#    endif
#  elif defined(__GNUC__)
#    if (__GNUC__ > 4 || (__GNUC__ == 4 && __GNUC_MINOR__ >= 6)) && defined(__GXX_EXPERIMENTAL_CXX0X__)
#      define V_NOEXCEPT_EXPR(x) noexcept(x) // GCC 4.7 and following have noexcept
#    endif
#  elif defined(_MSC_FULL_VER) && _MSC_FULL_VER >= 180021114
#    define QMUP_NOEXCEPT_EXPR(x) noexcept(x)
#  else
#    define V_NOEXCEPT_EXPR(x)
#  endif

extern const qreal PrintDPI;

//---------------------------------------------------------------------------------------------------------------------
inline double ToPixel(double val, const Unit &unit)
{
    switch (unit)
    {
        case Unit::Mm:
            return (val / 25.4) * PrintDPI;
        case Unit::Cm:
            return ((val * 10.0) / 25.4) * PrintDPI;
        case Unit::Inch:
            return val * PrintDPI;
        case Unit::Px:
            return val;
        default:
            break;
    }
    return 0;
}

//---------------------------------------------------------------------------------------------------------------------
inline double FromPixel(double pix, const Unit &unit)
{
    switch (unit)
    {
        case Unit::Mm:
            return (pix / PrintDPI) * 25.4;
        case Unit::Cm:
            return ((pix / PrintDPI) * 25.4) / 10.0;
        case Unit::Inch:
            return pix / PrintDPI;
        case Unit::Px:
            return pix;
        default:
            break;
    }
    return 0;
}

//---------------------------------------------------------------------------------------------------------------------
inline qreal UnitConvertor(qreal value, const Unit &from, const Unit &to)
{
    switch (from)
    {
        case Unit::Mm:
            switch (to)
            {
                case Unit::Mm:
                    return value;
                case Unit::Cm:
                    return value / 10.0;
                case Unit::Inch:
                    return value / 25.4;
                case Unit::Px:
                    return (value / 25.4) * PrintDPI;
                default:
                    break;
            }
            break;
        case Unit::Cm:
            switch (to)
            {
                case Unit::Mm:
                    return value * 10.0;
                case Unit::Cm:
                    return value;
                case Unit::Inch:
                    return value / 2.54;
                case Unit::Px:
                    return ((value * 10.0) / 25.4) * PrintDPI;
                default:
                    break;
            }
            break;
        case Unit::Inch:
            switch (to)
            {
                case Unit::Mm:
                    return value * 25.4;
                case Unit::Cm:
                    return value * 2.54;
                case Unit::Inch:
                    return value;
                case Unit::Px:
                    return value * PrintDPI;
                default:
                    break;
            }
            break;
        case Unit::Px:
            switch (to)
            {
                case Unit::Mm:
                    return (value / PrintDPI) * 25.4;
                case Unit::Cm:
                    return ((value / PrintDPI) * 25.4) / 10.0;
                case Unit::Inch:
                    return value / PrintDPI;
                case Unit::Px:
                    return value;
                default:
                    break;
            }
            break;
        default:
            break;
    }
    return 0;
}

#endif // IFCDEF_H