339 lines
9.7 KiB
C++
339 lines
9.7 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) 2010-2014 Jean-Pierre Charras jp.charras at wanadoo.fr
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* Copyright (C) 1992-2014 KiCad Developers, see change_log.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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#include <fctsys.h>
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#include <common.h>
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#include <gerber_file_image.h>
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#include <base_units.h>
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/* These routines read the text string point from Text.
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* On exit, Text points the beginning of the sequence unread
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*/
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// convertion scale from gerber file units to Gerbview internal units
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// depending on the gerber file format
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// this scale list assumes gerber units are imperial.
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// for metric gerber units, the imperial to metric conversion is made in read functions
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#define SCALE_LIST_SIZE 9
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static double scale_list[SCALE_LIST_SIZE] =
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{
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1000.0 * IU_PER_MILS, // x.1 format (certainly useless)
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100.0 * IU_PER_MILS, // x.2 format (certainly useless)
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10.0 * IU_PER_MILS, // x.3 format
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1.0 * IU_PER_MILS, // x.4 format
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0.1 * IU_PER_MILS, // x.5 format
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0.01 * IU_PER_MILS, // x.6 format
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0.001 * IU_PER_MILS, // x.7 format (currently the max allowed precision)
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0.0001 * IU_PER_MILS, // provided, but not used
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0.00001 * IU_PER_MILS, // provided, but not used
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};
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/*
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* Function scale
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* converts a coordinate given in floating point to Gerbvies internal units
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* (currently = 10 nanometers)
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*/
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int scaletoIU( double aCoord, bool isMetric )
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{
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int ret;
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if( isMetric ) // gerber are units in mm
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ret = KiROUND( aCoord * IU_PER_MM );
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else // gerber are units in inches
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ret = KiROUND( aCoord * IU_PER_MILS * 1000.0 );
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return ret;
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}
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wxPoint GERBER_FILE_IMAGE::ReadXYCoord( char*& Text, bool aExcellonMode )
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{
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wxPoint pos;
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int type_coord = 0, current_coord, nbdigits;
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bool is_float = false;
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char* text;
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char line[256];
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if( m_Relative )
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pos.x = pos.y = 0;
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else
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pos = m_CurrentPos;
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if( Text == NULL )
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return pos;
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text = line;
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while( *Text )
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{
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if( (*Text == 'X') || (*Text == 'Y') )
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{
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type_coord = *Text;
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Text++;
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text = line;
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nbdigits = 0;
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while( IsNumber( *Text ) )
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{
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if( *Text == '.' ) // Force decimat format if reading a floating point number
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is_float = true;
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// count digits only (sign and decimal point are not counted)
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if( (*Text >= '0') && (*Text <='9') )
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nbdigits++;
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*(text++) = *(Text++);
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}
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*text = 0;
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if( is_float )
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{
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// When X or Y values are float numbers, they are given in mm or inches
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if( m_GerbMetric ) // units are mm
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current_coord = KiROUND( atof( line ) * IU_PER_MILS / 0.0254 );
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else // units are inches
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current_coord = KiROUND( atof( line ) * IU_PER_MILS * 1000 );
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}
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else
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{
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int fmt_scale = (type_coord == 'X') ? m_FmtScale.x : m_FmtScale.y;
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if( m_NoTrailingZeros )
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{
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// no trailing zero format, we need to add missing zeros.
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int digit_count = (type_coord == 'X') ? m_FmtLen.x : m_FmtLen.y;
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while( nbdigits < digit_count )
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{
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*(text++) = '0';
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nbdigits++;
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}
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if( aExcellonMode )
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{
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// Truncate the extra digits if the len is more than expected
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// because the conversion to internal units expect exactly
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// digit_count digits
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while( nbdigits > digit_count )
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{
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*(text--) = 0;
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nbdigits--;
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}
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}
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*text = 0;
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}
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current_coord = atoi( line );
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double real_scale = scale_list[fmt_scale];
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if( m_GerbMetric )
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real_scale = real_scale / 25.4;
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current_coord = KiROUND( current_coord * real_scale );
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}
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if( type_coord == 'X' )
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pos.x = current_coord;
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else if( type_coord == 'Y' )
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pos.y = current_coord;
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continue;
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}
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else
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break;
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}
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if( m_Relative )
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{
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pos.x += m_CurrentPos.x;
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pos.y += m_CurrentPos.y;
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}
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m_CurrentPos = pos;
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return pos;
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}
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/* Returns the current coordinate type pointed to by InnJnn Text (InnnnJmmmm)
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* These coordinates are relative, so if coordinate is absent, it's value
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* defaults to 0
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*/
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wxPoint GERBER_FILE_IMAGE::ReadIJCoord( char*& Text )
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{
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wxPoint pos( 0, 0 );
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int type_coord = 0, current_coord, nbdigits;
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bool is_float = false;
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char* text;
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char line[256];
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if( Text == NULL )
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return pos;
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text = line;
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while( *Text )
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{
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if( (*Text == 'I') || (*Text == 'J') )
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{
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type_coord = *Text;
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Text++;
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text = line;
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nbdigits = 0;
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while( IsNumber( *Text ) )
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{
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if( *Text == '.' )
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is_float = true;
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// count digits only (sign and decimal point are not counted)
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if( (*Text >= '0') && (*Text <='9') )
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nbdigits++;
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*(text++) = *(Text++);
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}
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*text = 0;
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if( is_float )
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{
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// When X or Y values are float numbers, they are given in mm or inches
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if( m_GerbMetric ) // units are mm
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current_coord = KiROUND( atof( line ) * IU_PER_MILS / 0.0254 );
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else // units are inches
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current_coord = KiROUND( atof( line ) * IU_PER_MILS * 1000 );
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}
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else
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{
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int fmt_scale =
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(type_coord == 'I') ? m_FmtScale.x : m_FmtScale.y;
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if( m_NoTrailingZeros )
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{
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int min_digit =
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(type_coord == 'I') ? m_FmtLen.x : m_FmtLen.y;
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while( nbdigits < min_digit )
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{
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*(text++) = '0';
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nbdigits++;
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}
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*text = 0;
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}
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current_coord = atoi( line );
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double real_scale = scale_list[fmt_scale];
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if( m_GerbMetric )
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real_scale = real_scale / 25.4;
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current_coord = KiROUND( current_coord * real_scale );
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}
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if( type_coord == 'I' )
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pos.x = current_coord;
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else if( type_coord == 'J' )
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pos.y = current_coord;
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continue;
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}
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else
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break;
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}
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m_IJPos = pos;
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return pos;
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}
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// Helper functions:
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/**
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* Function ReadInt
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* reads an int from an ASCII character buffer. If there is a comma after the
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* int, then skip over that.
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* @param text A reference to a character pointer from which bytes are read
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* and the pointer is advanced for each byte read.
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* @param aSkipSeparator = true (default) to skip comma
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* @return int - The int read in.
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*/
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int ReadInt( char*& text, bool aSkipSeparator = true )
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{
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int ret;
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// For strtol, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
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// However, 'X' is a separator in Gerber strings with numbers.
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// We need to detect that
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if( strncasecmp( text, "0X", 2 ) == 0 )
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{
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text++;
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ret = 0;
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}
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else
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ret = (int) strtol( text, &text, 10 );
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if( *text == ',' || isspace( *text ) )
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{
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if( aSkipSeparator )
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++text;
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}
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return ret;
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}
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/**
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* Function ReadDouble
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* reads a double from an ASCII character buffer. If there is a comma after
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* the double, then skip over that.
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* @param text A reference to a character pointer from which the ASCII double
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* is read from and the pointer advanced for each character read.
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* @param aSkipSeparator = true (default) to skip comma
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* @return double
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*/
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double ReadDouble( char*& text, bool aSkipSeparator = true )
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{
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double ret;
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// For strtod, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
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// However, 'X' is a separator in Gerber strings with numbers.
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// We need to detect that
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if( strncasecmp( text, "0X", 2 ) == 0 )
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{
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text++;
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ret = 0.0;
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}
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else
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ret = strtod( text, &text );
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if( *text == ',' || isspace( *text ) )
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{
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if( aSkipSeparator )
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++text;
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}
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return ret;
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}
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