kicad/gerbview/rs274_read_XY_and_IJ_coordi...

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2014-10-21 18:36:45 +00:00
/*
* This program source code file is part of KiCad, a free EDA CAD application.
*
* Copyright (C) 2010-2014 Jean-Pierre Charras jp.charras at wanadoo.fr
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* Copyright (C) 1992-2021 KiCad Developers, see AUTHORS.txt for contributors.
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*
* 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
*/
#include <math/util.h> // for KiROUND
#include <gerber_file_image.h>
#include <base_units.h>
/* These routines read the text string point from Text.
* On exit, Text points the beginning of the sequence unread
*/
// conversion scale from gerber file units to Gerbview internal units
// depending on the gerber file format
// this scale list assumes gerber units are imperial.
// for metric gerber units, the imperial to metric conversion is made in read functions
#define SCALE_LIST_SIZE 9
static double scale_list[SCALE_LIST_SIZE] =
{
1000.0 * GERB_IU_PER_MM * 0.0254, // x.1 format (certainly useless)
100.0 * GERB_IU_PER_MM * 0.0254, // x.2 format (certainly useless)
10.0 * GERB_IU_PER_MM * 0.0254, // x.3 format
1.0 * GERB_IU_PER_MM * 0.0254, // x.4 format
0.1 * GERB_IU_PER_MM * 0.0254, // x.5 format
0.01 * GERB_IU_PER_MM * 0.0254, // x.6 format
0.001 * GERB_IU_PER_MM * 0.0254, // x.7 format (currently the max allowed precision)
0.0001 * GERB_IU_PER_MM * 0.0254, // provided, but not used
0.00001 * GERB_IU_PER_MM * 0.0254, // provided, but not used
};
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/**
* Convert a coordinate given in floating point to GerbView's internal units
* (currently = 10 nanometers).
*/
int scaletoIU( double aCoord, bool isMetric )
{
int ret;
if( isMetric ) // gerber are units in mm
ret = KiROUND( aCoord * GERB_IU_PER_MM );
else // gerber are units in inches
ret = KiROUND( aCoord * GERB_IU_PER_MM * 0.0254 );
return ret;
}
VECTOR2I GERBER_FILE_IMAGE::ReadXYCoord( char*& aText, bool aExcellonMode )
{
VECTOR2I pos( 0, 0 );
bool is_float = false;
std::string line;
// Reserve the anticipated length plus an optional sign and decimal
line.reserve( std::max( m_FmtLen.x, m_FmtLen.y ) + 3 );
if( m_Relative )
pos = m_CurrentPos;
if( aText == nullptr )
return pos;
while( *aText && ( ( *aText == 'X' ) || ( *aText == 'Y' ) || ( *aText == 'A' ) ) )
{
double decimal_scale = 1.0;
int nbdigits = 0;
int current_coord = 0;
char type_coord = *aText++;
line.clear();
while( IsNumber( *aText ) )
{
if( *aText == '.' ) // Force decimal format if reading a floating point number
is_float = true;
// count digits only (sign and decimal point are not counted)
if( (*aText >= '0') && (*aText <='9') )
nbdigits++;
line.push_back( *( aText++ ) );
}
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double val = strtod( line.data(), nullptr );
if( is_float )
{
// When X or Y (or A) values are float numbers, they are given in mm or inches
if( m_GerbMetric ) // units are mm
current_coord = KiROUND( val * GERB_IU_PER_MM );
else // units are inches
current_coord = KiROUND( val * GERB_IU_PER_MM * 0.0254 );
}
else
{
int fmt_scale = (type_coord == 'X') ? m_FmtScale.x : m_FmtScale.y;
if( m_NoTrailingZeros )
{
// no trailing zero format, we need to add missing zeros.
int digit_count = (type_coord == 'X') ? m_FmtLen.x : m_FmtLen.y;
// Truncate the extra digits if the len is more than expected
// because the conversion to internal units expect exactly
// digit_count digits. Alternatively, add some additional digits
// to pad out to the missing zeros
if( nbdigits < digit_count || ( aExcellonMode && ( nbdigits > digit_count ) ) )
decimal_scale = std::pow<double>( 10, digit_count - nbdigits );
}
double real_scale = scale_list[fmt_scale];
if( m_GerbMetric )
real_scale = real_scale / 25.4;
current_coord = KiROUND( val * real_scale * decimal_scale );
}
if( type_coord == 'X' )
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{
pos.x += current_coord;
}
else if( type_coord == 'Y' )
{
pos.y += current_coord;
}
else if( type_coord == 'A' )
{
m_ArcRadius = current_coord;
m_LastArcDataType = ARC_INFO_TYPE_RADIUS;
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}
}
m_CurrentPos = pos;
return pos;
}
VECTOR2I GERBER_FILE_IMAGE::ReadIJCoord( char*& aText )
{
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VECTOR2I pos( 0, 0 );
bool is_float = false;
std::string line;
// Reserve the anticipated length plus an optional sign and decimal
line.reserve( std::max( m_FmtLen.x, m_FmtLen.y ) + 3 );
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if( aText == nullptr )
return pos;
while( *aText && ( ( *aText == 'I' ) || ( *aText == 'J' ) ) )
{
double decimal_scale = 1.0;
int nbdigits = 0;
int current_coord = 0;
char type_coord = *aText++;
line.clear();
while( IsNumber( *aText ) )
{
if( *aText == '.' ) // Force decimal format if reading a floating point number
is_float = true;
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// count digits only (sign and decimal point are not counted)
if( (*aText >= '0') && (*aText <='9') )
nbdigits++;
line.push_back( *( aText++ ) );
}
double val = strtod( line.data(), nullptr );
if( is_float )
{
// When X or Y (or A) values are float numbers, they are given in mm or inches
if( m_GerbMetric ) // units are mm
current_coord = KiROUND( val * GERB_IU_PER_MM );
else // units are inches
current_coord = KiROUND( val * GERB_IU_PER_MM * 0.0254 );
}
else
{
int fmt_scale = ( type_coord == 'I' ) ? m_FmtScale.x : m_FmtScale.y;
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if( m_NoTrailingZeros )
{
// no trailing zero format, we need to add missing zeros.
int digit_count = ( type_coord == 'I' ) ? m_FmtLen.x : m_FmtLen.y;
// Truncate the extra digits if the len is more than expected
// because the conversion to internal units expect exactly
// digit_count digits. Alternatively, add some additional digits
// to pad out to the missing zeros
if( nbdigits < digit_count )
decimal_scale = std::pow<double>( 10, digit_count - nbdigits );
}
double real_scale = scale_list[fmt_scale];
if( m_GerbMetric )
real_scale = real_scale / 25.4;
current_coord = KiROUND( val * real_scale * decimal_scale );
}
if( type_coord == 'I' )
{
pos.x = current_coord;
}
else if( type_coord == 'J' )
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{
pos.y = current_coord;
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}
}
m_IJPos = pos;
m_LastArcDataType = ARC_INFO_TYPE_CENTER;
m_LastCoordIsIJPos = true;
return pos;
}
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// Helper functions:
/**
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* Read an integer from an ASCII character buffer.
*
* If there is a comma after the integer, then skip over that.
*
* @param text is a reference to a character pointer from which bytes are read
* and the pointer is advanced for each byte read.
* @param aSkipSeparator set to true (default) to skip comma.
* @return The integer read in.
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*/
int ReadInt( char*& text, bool aSkipSeparator = true )
{
int ret;
// For strtol, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
// However, 'X' is a separator in Gerber strings with numbers.
// We need to detect that
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if( strncasecmp( text, "0X", 2 ) == 0 )
{
text++;
ret = 0;
}
else
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{
ret = (int) strtol( text, &text, 10 );
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}
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if( *text == ',' || isspace( *text ) )
{
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if( aSkipSeparator )
++text;
}
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return ret;
}
/**
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* Read a double precision floating point number from an ASCII character buffer.
*
* If there is a comma after the number, then skip over that.
*
* @param text is a reference to a character pointer from which the ASCII double
* is read from and the pointer advanced for each character read.
* @param aSkipSeparator set to true (default) to skip comma.
* @return number read.
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*/
double ReadDouble( char*& text, bool aSkipSeparator = true )
{
double ret;
// For strtod, a string starting by 0X or 0x is a valid number in hexadecimal or octal.
// However, 'X' is a separator in Gerber strings with numbers.
// We need to detect that
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if( strncasecmp( text, "0X", 2 ) == 0 )
{
text++;
ret = 0.0;
}
else
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{
ret = strtod( text, &text );
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}
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if( *text == ',' || isspace( *text ) )
{
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if( aSkipSeparator )
++text;
}
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return ret;
}