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/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2012 CERN
*
* 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 2
* 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, you may find one here:
* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
* or you may search the http://www.gnu.org website for the version 2 license,
* or you may write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
*/
/**
* @file convert_from_iu.h
* @brief Definitions and functions to convert from internal units to user units
* depending upon the application and/or build options.
*/
#ifndef _CONVERT_FROM_IU_
#define _CONVERT_FROM_IU_
/// Convert from internal units to user units.
#if defined(PCBNEW) || defined(CVPCB) || defined(GERBVIEW)
#if defined(GERBVIEW)
#define MM_PER_IU 1.0 / 1e5 // Gerbview uses 10 micrometer.
#else
#define MM_PER_IU 1.0 / 1e6 // Pcbnew in nanometers.
#endif
#define MILS_PER_IU ( MM_PER_IU * 0.0254 )
#define DECIMILS_PER_IU (MM_PER_IU * 0.00254 )
/// Convert PCBNEW internal units (iu) to mils.
inline int Iu2Mils( int iu )
{
double x = iu * MILS_PER_IU;
return int( x < 0 ? x - 0.5 : x + 0.5 );
}
/// Convert PCBNEW internal units (iu) to deci-mils.
inline int Iu2DMils( int iu )
{
double x = iu * DECIMILS_PER_IU;
return int( x < 0 ? x - 0.5 : x + 0.5 );
}
#else // Eeschema and anything else.
#define MILS_PER_IU 1.0
#define MM_PER_IU (MILS_PER_IU / 0.0254)
inline int Iu2Mils( int iu )
{
return iu;
}
#endif
#endif // #define _CONVERT_FROM_IU_
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