70 lines
2.1 KiB
C
70 lines
2.1 KiB
C
/*
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* This program source code file is part of KiCad, a free EDA CAD application.
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*
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* Copyright (C) 2012 CERN
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*
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License
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* as published by the Free Software Foundation; either version 2
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* of the License, or (at your option) any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, you may find one here:
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* http://www.gnu.org/licenses/old-licenses/gpl-2.0.html
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* or you may search the http://www.gnu.org website for the version 2 license,
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* or you may write to the Free Software Foundation, Inc.,
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* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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/**
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* @file convert_from_iu.h
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* @brief Definitions and functions to convert from internal units to user units
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* depending upon the application and/or build options.
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*/
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#ifndef _CONVERT_FROM_IU_
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#define _CONVERT_FROM_IU_
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/// Convert from internal units to user units.
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#if defined(PCBNEW) || defined(CVPCB) || defined(GERBVIEW)
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#if defined(GERBVIEW)
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#define MM_PER_IU 1.0 / 1e5 // Gerbview uses 10 micrometer.
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#else
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#define MM_PER_IU 1.0 / 1e6 // Pcbnew in nanometers.
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#endif
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#define MILS_PER_IU ( MM_PER_IU * 0.0254 )
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#define DECIMILS_PER_IU (MM_PER_IU * 0.00254 )
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/// Convert PCBNEW internal units (iu) to mils.
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inline int Iu2Mils( int iu )
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{
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double x = iu * MILS_PER_IU;
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return int( x < 0 ? x - 0.5 : x + 0.5 );
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}
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/// Convert PCBNEW internal units (iu) to deci-mils.
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inline int Iu2DMils( int iu )
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{
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double x = iu * DECIMILS_PER_IU;
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return int( x < 0 ? x - 0.5 : x + 0.5 );
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}
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#else // Eeschema and anything else.
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#define MILS_PER_IU 1.0
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#define MM_PER_IU (MILS_PER_IU / 0.0254)
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inline int Iu2Mils( int iu )
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{
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return iu;
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}
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#endif
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#endif // #define _CONVERT_FROM_IU_
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