lset.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2014 SoftPLC Corporation, Dick Hollenbeck <[email protected]>
 * Copyright (C) 2014-2023 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * 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 <algorithm>
#include <bitset> // for bitset, __bitset<>::ref...
#include <cassert>
#include <cstdarg>
#include <iostream> // for string, endl, basic_ost...
#include <cstddef> // for size_t
 
#include <core/arraydim.h>
#include <layer_ids.h> // for PCB_LAYER_ID
#include <lseq.h>
#include <macros.h> // for arrayDim
#include <wx/debug.h> // for wxASSERT, wxASSERT_MSG
#include <wx/string.h>
 
#include <lset.h>
 
 
LSET::LSET( std::initializer_list<PCB_LAYER_ID> aList ) :
 LSET()
{
 for( PCB_LAYER_ID layer : aList )
 set( layer );
}
 
 
LSET::LSET( const LSEQ& aSeq ) :
 LSET()
{
 for( PCB_LAYER_ID layer : aSeq )
 set( layer );
}
 
 
const wxChar* LSET::Name( PCB_LAYER_ID aLayerId )
{
 const wxChar* txt;
 
 // using a switch to explicitly show the mapping more clearly
 switch( aLayerId )
 {
 case F_Cu: txt = wxT( "F.Cu" ); break;
 case In1_Cu: txt = wxT( "In1.Cu" ); break;
 case In2_Cu: txt = wxT( "In2.Cu" ); break;
 case In3_Cu: txt = wxT( "In3.Cu" ); break;
 case In4_Cu: txt = wxT( "In4.Cu" ); break;
 case In5_Cu: txt = wxT( "In5.Cu" ); break;
 case In6_Cu: txt = wxT( "In6.Cu" ); break;
 case In7_Cu: txt = wxT( "In7.Cu" ); break;
 case In8_Cu: txt = wxT( "In8.Cu" ); break;
 case In9_Cu: txt = wxT( "In9.Cu" ); break;
 case In10_Cu: txt = wxT( "In10.Cu" ); break;
 case In11_Cu: txt = wxT( "In11.Cu" ); break;
 case In12_Cu: txt = wxT( "In12.Cu" ); break;
 case In13_Cu: txt = wxT( "In13.Cu" ); break;
 case In14_Cu: txt = wxT( "In14.Cu" ); break;
 case In15_Cu: txt = wxT( "In15.Cu" ); break;
 case In16_Cu: txt = wxT( "In16.Cu" ); break;
 case In17_Cu: txt = wxT( "In17.Cu" ); break;
 case In18_Cu: txt = wxT( "In18.Cu" ); break;
 case In19_Cu: txt = wxT( "In19.Cu" ); break;
 case In20_Cu: txt = wxT( "In20.Cu" ); break;
 case In21_Cu: txt = wxT( "In21.Cu" ); break;
 case In22_Cu: txt = wxT( "In22.Cu" ); break;
 case In23_Cu: txt = wxT( "In23.Cu" ); break;
 case In24_Cu: txt = wxT( "In24.Cu" ); break;
 case In25_Cu: txt = wxT( "In25.Cu" ); break;
 case In26_Cu: txt = wxT( "In26.Cu" ); break;
 case In27_Cu: txt = wxT( "In27.Cu" ); break;
 case In28_Cu: txt = wxT( "In28.Cu" ); break;
 case In29_Cu: txt = wxT( "In29.Cu" ); break;
 case In30_Cu: txt = wxT( "In30.Cu" ); break;
 case B_Cu: txt = wxT( "B.Cu" ); break;
 
 // Technicals
 case B_Adhes: txt = wxT( "B.Adhes" ); break;
 case F_Adhes: txt = wxT( "F.Adhes" ); break;
 case B_Paste: txt = wxT( "B.Paste" ); break;
 case F_Paste: txt = wxT( "F.Paste" ); break;
 case B_SilkS: txt = wxT( "B.SilkS" ); break;
 case F_SilkS: txt = wxT( "F.SilkS" ); break;
 case B_Mask: txt = wxT( "B.Mask" ); break;
 case F_Mask: txt = wxT( "F.Mask" ); break;
 
 // Users
 case Dwgs_User: txt = wxT( "Dwgs.User" ); break;
 case Cmts_User: txt = wxT( "Cmts.User" ); break;
 case Eco1_User: txt = wxT( "Eco1.User" ); break;
 case Eco2_User: txt = wxT( "Eco2.User" ); break;
 case Edge_Cuts: txt = wxT( "Edge.Cuts" ); break;
 case Margin: txt = wxT( "Margin" ); break;
 
 // Footprint
 case F_CrtYd: txt = wxT( "F.CrtYd" ); break;
 case B_CrtYd: txt = wxT( "B.CrtYd" ); break;
 case F_Fab: txt = wxT( "F.Fab" ); break;
 case B_Fab: txt = wxT( "B.Fab" ); break;
 
 // User definable layers.
 case User_1: txt = wxT( "User.1" ); break;
 case User_2: txt = wxT( "User.2" ); break;
 case User_3: txt = wxT( "User.3" ); break;
 case User_4: txt = wxT( "User.4" ); break;
 case User_5: txt = wxT( "User.5" ); break;
 case User_6: txt = wxT( "User.6" ); break;
 case User_7: txt = wxT( "User.7" ); break;
 case User_8: txt = wxT( "User.8" ); break;
 case User_9: txt = wxT( "User.9" ); break;
 
 // Rescue
 case Rescue: txt = wxT( "Rescue" ); break;
 
 default:
 std::cout << aLayerId << std::endl;
 wxASSERT_MSG( 0, wxT( "aLayerId out of range" ) );
 txt = wxT( "BAD INDEX!" ); break;
 }
 
 return txt;
}
 
 
LSEQ LSET::CuStack() const
{
 // desired sequence
 static const PCB_LAYER_ID sequence[] = {
 F_Cu,
 In1_Cu,
 In2_Cu,
 In3_Cu,
 In4_Cu,
 In5_Cu,
 In6_Cu,
 In7_Cu,
 In8_Cu,
 In9_Cu,
 In10_Cu,
 In11_Cu,
 In12_Cu,
 In13_Cu,
 In14_Cu,
 In15_Cu,
 In16_Cu,
 In17_Cu,
 In18_Cu,
 In19_Cu,
 In20_Cu,
 In21_Cu,
 In22_Cu,
 In23_Cu,
 In24_Cu,
 In25_Cu,
 In26_Cu,
 In27_Cu,
 In28_Cu,
 In29_Cu,
 In30_Cu,
 B_Cu, // 31
 };
 
 return Seq( sequence, arrayDim( sequence ) );
}
 
 
LSEQ LSET::Technicals( LSET aSetToOmit ) const
{
 // desired sequence
 static const PCB_LAYER_ID sequence[] = {
 F_Adhes,
 B_Adhes,
 F_Paste,
 B_Paste,
 F_SilkS,
 B_SilkS,
 F_Mask,
 B_Mask,
 F_CrtYd,
 B_CrtYd,
 F_Fab,
 B_Fab,
 };
 
 LSET subset = ~aSetToOmit & *this;
 
 return subset.Seq( sequence, arrayDim( sequence ) );
}
 
 
LSEQ LSET::Users() const
{
 // desired
 static const PCB_LAYER_ID sequence[] = {
 Dwgs_User,
 Cmts_User,
 Eco1_User,
 Eco2_User,
 Edge_Cuts,
 Margin,
 User_1,
 User_2,
 User_3,
 User_4,
 User_5,
 User_6,
 User_7,
 User_8,
 User_9
 };
 
 return Seq( sequence, arrayDim( sequence ) );
}
 
 
LSEQ LSET::TechAndUserUIOrder() const
{
 static const PCB_LAYER_ID sequence[] = {
 F_Adhes,
 B_Adhes,
 F_Paste,
 B_Paste,
 F_SilkS,
 B_SilkS,
 F_Mask,
 B_Mask,
 Dwgs_User,
 Cmts_User,
 Eco1_User,
 Eco2_User,
 Edge_Cuts,
 Margin,
 F_CrtYd,
 B_CrtYd,
 F_Fab,
 B_Fab,
 User_1,
 User_2,
 User_3,
 User_4,
 User_5,
 User_6,
 User_7,
 User_8,
 User_9
 };
 
 return Seq( sequence, arrayDim( sequence ) );
}
 
 
std::string LSET::FmtBin() const
{
 std::string ret;
 
 int bit_count = size();
 
 for( int bit=0; bit<bit_count; ++bit )
 {
 if( bit )
 {
 if( !( bit % 8 ) )
 ret += '|';
 else if( !( bit % 4 ) )
 ret += '_';
 }
 
 ret += (*this)[bit] ? '1' : '0';
 }
 
 // reverse of string
 return std::string( ret.rbegin(), ret.rend() );
}
 
 
std::string LSET::FmtHex() const
{
 std::string ret;
 
 static const char hex[] = "0123456789abcdef";
 
 size_t nibble_count = ( size() + 3 ) / 4;
 
 for( size_t nibble = 0; nibble < nibble_count; ++nibble )
 {
 unsigned int ndx = 0;
 
 // test 4 consecutive bits and set ndx to 0-15
 for( size_t nibble_bit = 0; nibble_bit < 4; ++nibble_bit )
 {
 size_t nibble_pos = nibble_bit + ( nibble * 4 );
 // make sure it's not extra bits that don't exist in the bitset but need to in the
 // hex format
 if( nibble_pos >= size() )
 break;
 
 if( ( *this )[nibble_pos] )
 ndx |= ( 1 << nibble_bit );
 }
 
 if( nibble && !( nibble % 8 ) )
 ret += '_';
 
 assert( ndx < arrayDim( hex ) );
 
 ret += hex[ndx];
 }
 
 // reverse of string
 return std::string( ret.rbegin(), ret.rend() );
}
 
 
int LSET::ParseHex( const char* aStart, int aCount )
{
 LSET tmp;
 
 const char* rstart = aStart + aCount - 1;
 const char* rend = aStart - 1;
 
 const int bitcount = size();
 
 int nibble_ndx = 0;
 
 while( rstart > rend )
 {
 int cc = *rstart--;
 
 if( cc == '_' )
 continue;
 
 int nibble;
 
 if( cc >= '0' && cc <= '9' )
 nibble = cc - '0';
 else if( cc >= 'a' && cc <= 'f' )
 nibble = cc - 'a' + 10;
 else if( cc >= 'A' && cc <= 'F' )
 nibble = cc - 'A' + 10;
 else
 break;
 
 int bit = nibble_ndx * 4;
 
 for( int ndx=0; bit<bitcount && ndx<4; ++bit, ++ndx )
 if( nibble & (1<<ndx) )
 tmp.set( bit );
 
 if( bit >= bitcount )
 break;
 
 ++nibble_ndx;
 }
 
 int byte_count = aStart + aCount - 1 - rstart;
 
 assert( byte_count >= 0 );
 
 if( byte_count > 0 )
 *this = tmp;
 
 return byte_count;
}
 
 
LSEQ LSET::Seq( const PCB_LAYER_ID* aWishListSequence, unsigned aCount ) const
{
 LSEQ ret;
 
#if defined(DEBUG) && 0
 LSET dup_detector;
 
 for( unsigned i=0; i<aCount; ++i )
 {
 PCB_LAYER_ID id = aWishListSequence[i];
 
 if( test( id ) )
 {
 wxASSERT_MSG( !dup_detector[id], wxT( "Duplicate in aWishListSequence" ) );
 dup_detector[id] = true;
 
 ret.push_back( id );
 }
 }
#else
 
 for( unsigned i=0; i<aCount; ++i )
 {
 PCB_LAYER_ID id = aWishListSequence[i];
 
 if( test( id ) )
 ret.push_back( id );
 }
#endif
 
 return ret;
}
 
 
LSEQ LSET::Seq( const LSEQ& aSequence ) const
{
 LSEQ ret;
 
 for( PCB_LAYER_ID layer : aSequence )
 {
 if( test( layer ) )
 ret.push_back( layer );
 }
 
 return ret;
}
 
 
LSEQ LSET::Seq() const
{
 LSEQ ret;
 
 ret.reserve( size() );
 
 for( unsigned i = 0; i < size(); ++i )
 {
 if( test( i ) )
 ret.push_back( PCB_LAYER_ID( i ) );
 }
 
 return ret;
}
 
 
LSEQ LSET::SeqStackupTop2Bottom( PCB_LAYER_ID aSelectedLayer ) const
{
 static const PCB_LAYER_ID sequence[] = {
 Edge_Cuts,
 Margin,
 Dwgs_User,
 Cmts_User,
 Eco1_User,
 Eco2_User,
 User_1,
 User_2,
 User_3,
 User_4,
 User_5,
 User_6,
 User_7,
 User_8,
 User_9,
 F_Fab,
 F_SilkS,
 F_Paste,
 F_Adhes,
 F_Mask,
 F_CrtYd,
 F_Cu,
 In1_Cu,
 In2_Cu,
 In3_Cu,
 In4_Cu,
 In5_Cu,
 In6_Cu,
 In7_Cu,
 In8_Cu,
 In9_Cu,
 In10_Cu,
 In11_Cu,
 In12_Cu,
 In13_Cu,
 In14_Cu,
 In15_Cu,
 In16_Cu,
 In17_Cu,
 In18_Cu,
 In19_Cu,
 In20_Cu,
 In21_Cu,
 In22_Cu,
 In23_Cu,
 In24_Cu,
 In25_Cu,
 In26_Cu,
 In27_Cu,
 In28_Cu,
 In29_Cu,
 In30_Cu,
 B_Cu,
 B_CrtYd,
 B_Mask,
 B_Adhes,
 B_Paste,
 B_SilkS,
 B_Fab,
 };
 
 LSEQ seq = Seq( sequence, arrayDim( sequence ) );
 
 if( aSelectedLayer != UNDEFINED_LAYER )
 {
 auto it = std::find( seq.begin(), seq.end(), aSelectedLayer );
 
 if( it != seq.end() )
 {
 seq.erase( it );
 seq.insert( seq.begin(), aSelectedLayer );
 }
 }
 
 return seq;
}
 
 
LSEQ LSET::SeqStackupForPlotting() const
{
 // bottom-to-top stack-up layers
 // Note that the bottom technical layers are flipped so that when plotting a bottom-side view,
 // they appear in the correct sequence.
 static const PCB_LAYER_ID sequence[] = {
 B_Cu,
 B_Mask,
 B_Paste,
 B_SilkS,
 B_Adhes,
 B_CrtYd,
 B_Fab,
 In30_Cu,
 In29_Cu,
 In28_Cu,
 In27_Cu,
 In26_Cu,
 In25_Cu,
 In24_Cu,
 In23_Cu,
 In22_Cu,
 In21_Cu,
 In20_Cu,
 In19_Cu,
 In18_Cu,
 In17_Cu,
 In16_Cu,
 In15_Cu,
 In14_Cu,
 In13_Cu,
 In12_Cu,
 In11_Cu,
 In10_Cu,
 In9_Cu,
 In8_Cu,
 In7_Cu,
 In6_Cu,
 In5_Cu,
 In4_Cu,
 In3_Cu,
 In2_Cu,
 In1_Cu,
 F_Cu,
 F_Mask,
 F_Paste,
 F_SilkS,
 F_Adhes,
 F_CrtYd,
 F_Fab,
 Dwgs_User,
 Cmts_User,
 Eco1_User,
 Eco2_User,
 User_1,
 User_2,
 User_3,
 User_4,
 User_5,
 User_6,
 User_7,
 User_8,
 User_9,
 Margin,
 Edge_Cuts,
 };
 
 return Seq( sequence, arrayDim( sequence ) );
}
 
 
LSET& LSET::Flip( int aCopperLayersCount )
{
 LSET oldMask = *this;
 
 reset();
 
 if( oldMask.test( B_Cu ) )
 set( F_Cu );
 
 if( oldMask.test( F_Cu ) )
 set( B_Cu );
 
 if( oldMask.test( B_SilkS ) )
 set( F_SilkS );
 
 if( oldMask.test( F_SilkS ) )
 set( B_SilkS );
 
 if( oldMask.test( B_Adhes ) )
 set( F_Adhes );
 
 if( oldMask.test( F_Adhes ) )
 set( B_Adhes );
 
 if( oldMask.test( B_Mask ) )
 set( F_Mask );
 
 if( oldMask.test( F_Mask ) )
 set( B_Mask );
 
 if( oldMask.test( B_Paste ) )
 set( F_Paste );
 
 if( oldMask.test( F_Paste ) )
 set( B_Paste );
 
 if( oldMask.test( B_Adhes ) )
 set( F_Adhes );
 
 if( oldMask.test( F_Adhes ) )
 set( B_Adhes );
 
 if( oldMask.test( B_CrtYd ) )
 set( F_CrtYd );
 
 if( oldMask.test( F_CrtYd ) )
 set( B_CrtYd );
 
 if( oldMask.test( B_Fab ) )
 set( F_Fab );
 
 if( oldMask.test( F_Fab ) )
 set( B_Fab );
 
 if( aCopperLayersCount >= 4 ) // Internal layers exist
 {
 LSET internalMask = oldMask & InternalCuMask();
 int innerLayerCnt = aCopperLayersCount - 2;
 
 // the flipped mask is the innerLayerCnt bits rewritten in reverse order
 // ( bits innerLayerCnt to 1 rewritten in bits 1 to innerLayerCnt )
 for( int ii = 0; ii < innerLayerCnt; ii++ )
 {
 if( internalMask[innerLayerCnt - ii] )
 {
 set( ii + In1_Cu );
 }
 else
 {
 reset( ii + In1_Cu );
 }
 }
 }
 
 return *this;
}
 
 
PCB_LAYER_ID LSET::ExtractLayer() const
{
 unsigned set_count = count();
 
 if( !set_count )
 return UNSELECTED_LAYER;
 else if( set_count > 1 )
 return UNDEFINED_LAYER;
 
 for( unsigned i=0; i < size(); ++i )
 {
 if( test( i ) )
 return PCB_LAYER_ID( i );
 }
 
 wxASSERT( 0 ); // set_count was verified as 1 above, what did you break?
 
 return UNDEFINED_LAYER;
}
 
 
LSET LSET::FrontAssembly()
{
 static const LSET saved( { F_SilkS, F_Mask, F_Fab, F_CrtYd } );
 return saved;
}
 
 
LSET LSET::BackAssembly()
{
 static const LSET saved( { B_SilkS, B_Mask, B_Fab, B_CrtYd } );
 return saved;
}
 
 
LSET LSET::InternalCuMask()
{
 static const LSET saved( { In1_Cu, In2_Cu, In3_Cu, In4_Cu, In5_Cu, In6_Cu,
 In7_Cu, In8_Cu, In9_Cu, In10_Cu, In11_Cu, In12_Cu,
 In13_Cu, In14_Cu, In15_Cu, In16_Cu, In17_Cu, In18_Cu,
 In19_Cu, In20_Cu, In21_Cu, In22_Cu, In23_Cu, In24_Cu,
 In25_Cu, In26_Cu, In27_Cu, In28_Cu, In29_Cu, In30_Cu } );
 return saved;
}
 
 
LSET LSET::AllCuMask( int aCuLayerCount )
{
 // retain all in static as the full set, which is a common case.
 static const LSET all = InternalCuMask().set( F_Cu ).set( B_Cu );
 
 if( aCuLayerCount == MAX_CU_LAYERS )
 return all;
 
 // subtract out some Cu layers not wanted in the mask.
 LSET ret = all;
 int clear_count = MAX_CU_LAYERS - aCuLayerCount;
 
 clear_count = std::clamp( clear_count, 0, MAX_CU_LAYERS - 2 );
 
 for( int elem = In30_Cu; clear_count; --elem, --clear_count )
 ret.set( elem, false );
 
 return ret;
}
 
 
LSET LSET::AllNonCuMask()
{
 static const LSET saved = LSET().set() & ~AllCuMask();
 return saved;
}
 
 
LSET LSET::ExternalCuMask()
{
 static const LSET saved( { F_Cu, B_Cu } );
 return saved;
}
 
 
LSET LSET::AllLayersMask()
{
 static const LSET saved = LSET().set();
 return saved;
}
 
 
LSET LSET::BackTechMask()
{
 static const LSET saved( { B_SilkS, B_Mask, B_Adhes, B_Paste, B_CrtYd, B_Fab } );
 return saved;
}
 
LSET LSET::BackBoardTechMask()
{
 static const LSET saved( { B_SilkS, B_Mask, B_Adhes, B_Paste } );
 return saved;
}
 
LSET LSET::FrontTechMask()
{
 static const LSET saved( { F_SilkS, F_Mask, F_Adhes, F_Paste, F_CrtYd, F_Fab } );
 return saved;
}
 
 
LSET LSET::FrontBoardTechMask()
{
 static const LSET saved( { F_SilkS, F_Mask, F_Adhes, F_Paste } );
 return saved;
}
 
 
LSET LSET::AllTechMask()
{
 static const LSET saved = BackTechMask() | FrontTechMask();
 return saved;
}
 
 
LSET LSET::AllBoardTechMask()
{
 static const LSET saved = BackBoardTechMask() | FrontBoardTechMask();
 return saved;
}
 
 
LSET LSET::UserMask()
{
 static const LSET saved( { Dwgs_User, Cmts_User, Eco1_User, Eco2_User, Edge_Cuts, Margin } );
 
 return saved;
}
 
 
LSET LSET::PhysicalLayersMask()
{
 static const LSET saved = AllBoardTechMask() | AllCuMask();
 return saved;
}
 
 
LSET LSET::UserDefinedLayers()
{
 static const LSET saved(
 { User_1, User_2, User_3, User_4, User_5, User_6, User_7, User_8, User_9 } );
 
 return saved;
}
 
 
LSET LSET::FrontMask()
{
 static const LSET saved = FrontTechMask().set( F_Cu );
 return saved;
}
 
 
LSET LSET::BackMask()
{
 static const LSET saved = BackTechMask().set( B_Cu );
 return saved;
}
 
LSET LSET::SideSpecificMask()
{
 static const LSET saved = BackTechMask() | FrontTechMask() | AllCuMask();
 return saved;
}
 
 
LSET LSET::ForbiddenFootprintLayers()
{
 static const LSET saved = InternalCuMask();
 return saved;
}
 
 
LSEQ LSET::UIOrder() const
{
 LSEQ order = CuStack();
 LSEQ techuser = TechAndUserUIOrder();
 order.insert( order.end(), techuser.begin(), techuser.end() );
 
 return order;
}
 
 
PCB_LAYER_ID ToLAYER_ID( int aLayer )
{
 wxASSERT( aLayer < GAL_LAYER_ID_END );
 return PCB_LAYER_ID( aLayer );
}
 
 
GAL_SET::GAL_SET( const GAL_LAYER_ID* aArray, unsigned aCount ) : GAL_SET()
{
 for( unsigned i = 0; i < aCount; ++i )
 set( aArray[i] );
}
 
 
std::vector<GAL_LAYER_ID> GAL_SET::Seq() const
{
 std::vector<GAL_LAYER_ID> ret;
 
 for( size_t i = 0; i < size(); ++i )
 {
 if( test( i ) )
 ret.push_back( static_cast<GAL_LAYER_ID>( i + GAL_LAYER_ID_START ) );
 }
 
 return ret;
}
 
 
GAL_SET GAL_SET::DefaultVisible()
{
 static const GAL_LAYER_ID visible[] = {
 LAYER_VIAS,
 LAYER_VIA_MICROVIA,
 LAYER_VIA_BBLIND,
 LAYER_VIA_THROUGH,
 // LAYER_HIDDEN_TEXT, // Invisible text hidden by default
 LAYER_ANCHOR,
 LAYER_PADS_SMD_FR,
 LAYER_PADS_SMD_BK,
 LAYER_RATSNEST,
 LAYER_GRID,
 LAYER_GRID_AXES,
 LAYER_FOOTPRINTS_FR,
 LAYER_FOOTPRINTS_BK,
 LAYER_FP_TEXT,
 LAYER_FP_VALUES,
 LAYER_FP_REFERENCES,
 LAYER_TRACKS,
 LAYER_PADS_TH,
 LAYER_PAD_PLATEDHOLES,
 LAYER_NON_PLATEDHOLES,
 LAYER_PAD_HOLEWALLS,
 LAYER_VIA_HOLES,
 LAYER_VIA_HOLEWALLS,
 LAYER_DRC_ERROR,
 LAYER_DRC_WARNING,
 // LAYER_DRC_EXCLUSION, // DRC exclusions hidden by default
 LAYER_DRAWINGSHEET,
 LAYER_GP_OVERLAY,
 LAYER_SELECT_OVERLAY,
 LAYER_PCB_BACKGROUND,
 LAYER_CURSOR,
 LAYER_AUX_ITEMS,
 LAYER_DRAW_BITMAPS,
 LAYER_PADS,
 LAYER_ZONES,
 LAYER_SHAPES,
 LAYER_LOCKED_ITEM_SHADOW,
 LAYER_CONFLICTS_SHADOW
 };
 
 static const GAL_SET saved( visible, arrayDim( visible ) );
 return saved;
}