105 lines
3.0 KiB
C
105 lines
3.0 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) 2012-2016 Jean-Pierre Charras, jp.charras at wanadoo.fr
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* Copyright (C) 1992-2016 KiCad Developers, see CHANGELOG.TXT for contributors.
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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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#ifndef CONVERT_TO_BIU_H_
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#define CONVERT_TO_BIU_H_
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/**
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* @file convert_to_biu.h
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*/
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/**
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* @brief some define and functions to convert a value in mils, decimils or mm
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* to the internal unit used in pcbnew, cvpcb or gerbview (nanometer or deci-mil)
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* depending on compile time option
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*/
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/// Scaling factor to convert mils to internal units.
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#if defined(PCBNEW) || defined(CVPCB) || defined(GERBVIEW)
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#if defined(GERBVIEW)
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#define IU_PER_MM 1e5 // Gerbview IU is 10 nanometers.
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#else
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#define IU_PER_MM 1e6 // Pcbnew IU is 1 nanometer.
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#endif
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#define IU_PER_MILS (IU_PER_MM * 0.0254)
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/// Convert mils to PCBNEW internal units (iu).
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inline int Mils2iu( int mils )
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{
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double x = mils * IU_PER_MILS;
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return int( x < 0 ? x - 0.5 : x + 0.5 );
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}
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#elif defined (PL_EDITOR)
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#define IU_PER_MM 1e3 // internal units in micron (should be enough)
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#define IU_PER_MILS (IU_PER_MM * 0.0254)
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/// Convert mils to page layout editor internal units (iu).
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inline int Mils2iu( int mils )
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{
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double x = mils * IU_PER_MILS;
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return int( x < 0 ? x - 0.5 : x + 0.5 );
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}
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#elif defined (EESCHEMA) // Eeschema
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#define IU_PER_MILS 1.0
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#define IU_PER_MM (IU_PER_MILS / 0.0254)
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inline int Mils2iu( int mils )
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{
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return mils;
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}
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#else
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// Here, we do not know the value of internal units: do not define
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// conversion functions (They do not have meaning
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#define UNKNOWN_IU
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#endif
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#ifndef UNKNOWN_IU
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// Other definitions used in a few files
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#define MM_PER_IU (1/IU_PER_MM)
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/// Convert mm to internal units (iu).
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inline int Millimeter2iu( double mm )
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{
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return (int) ( mm < 0 ? mm * IU_PER_MM - 0.5 : mm * IU_PER_MM + 0.5);
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}
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/// Convert mm to internal units (iu).
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inline double Iu2Millimeter( int iu )
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{
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return iu / IU_PER_MM;
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}
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/// Convert mm to internal units (iu).
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inline double Iu2Mils( int iu )
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{
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return iu / IU_PER_MILS;
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}
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#endif
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#endif // CONVERT_TO_BIU_H_
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