plot_board_layers.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 1992-2022 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 <eda_item.h>
#include <layer_ids.h>
#include <geometry/geometry_utils.h>
#include <geometry/shape_segment.h>
#include <pcb_base_frame.h>
#include <math/util.h> // for KiROUND
 
#include <board.h>
#include <board_design_settings.h>
#include <core/arraydim.h>
#include <footprint.h>
#include <pcb_track.h>
#include <fp_shape.h>
#include <pad.h>
#include <pcb_text.h>
#include <zone.h>
#include <pcb_shape.h>
#include <pcb_target.h>
#include <pcb_dimension.h>
 
#include <pcbplot.h>
#include <plotters/plotter_dxf.h>
#include <plotters/plotter_hpgl.h>
#include <plotters/plotter_gerber.h>
#include <plotters/plotters_pslike.h>
#include <pcb_painter.h>
#include <gbr_metadata.h>
#include <advanced_config.h>
 
/*
 * Plot a solder mask layer. Solder mask layers have a minimum thickness value and cannot be
 * drawn like standard layers, unless the minimum thickness is 0.
 */
static void PlotSolderMaskLayer( BOARD *aBoard, PLOTTER* aPlotter, LSET aLayerMask,
 const PCB_PLOT_PARAMS& aPlotOpt, int aMinThickness );
 
 
void PlotBoardLayers( BOARD* aBoard, PLOTTER* aPlotter, const LSEQ& aLayers,
 const PCB_PLOT_PARAMS& aPlotOptions )
{
 wxCHECK( aBoard && aPlotter && aLayers.size(), /* void */ );
 
 for( LSEQ seq = aLayers; seq; ++seq )
 PlotOneBoardLayer( aBoard, aPlotter, *seq, aPlotOptions );
}
 
 
void PlotInteractiveLayer( BOARD* aBoard, PLOTTER* aPlotter )
{
 for( const FOOTPRINT* fp : aBoard->Footprints() )
 {
 std::vector<wxString> properties;
 
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
 _( "Reference designator" ),
 fp->Reference().GetShownText() ) );
 
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
 _( "Value" ),
 fp->Value().GetShownText() ) );
 
 for( const auto& [ name, value ] : fp->GetProperties() )
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ), name, value ) );
 
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
 _( "Footprint" ),
 fp->GetFPIDAsString() ) );
 
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
 _( "Description" ),
 fp->GetDescription() ) );
 
 properties.emplace_back( wxString::Format( wxT( "!%s = %s" ),
 _( "Keywords" ),
 fp->GetKeywords() ) );
 
 aPlotter->HyperlinkMenu( fp->GetBoundingBox(), properties );
 }
}
 
 
void PlotOneBoardLayer( BOARD *aBoard, PLOTTER* aPlotter, PCB_LAYER_ID aLayer,
 const PCB_PLOT_PARAMS& aPlotOpt )
{
 PCB_PLOT_PARAMS plotOpt = aPlotOpt;
 int soldermask_min_thickness = aBoard->GetDesignSettings().m_SolderMaskMinWidth;
 
 // Set a default color and the text mode for this layer
 aPlotter->SetColor( BLACK );
 aPlotter->SetTextMode( aPlotOpt.GetTextMode() );
 
 // Specify that the contents of the "Edges Pcb" layer are to be plotted in addition to the
 // contents of the currently specified layer.
 LSET layer_mask( aLayer );
 
 if( IsCopperLayer( aLayer ) )
 {
 // Skip NPTH pads on copper layers ( only if hole size == pad size ):
 // Drill mark will be plotted if drill mark is SMALL_DRILL_SHAPE or FULL_DRILL_SHAPE
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF )
 {
 plotOpt.SetSkipPlotNPTH_Pads( false );
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 }
 else
 {
 plotOpt.SetSkipPlotNPTH_Pads( true );
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 }
 }
 else
 {
 switch( aLayer )
 {
 case B_Mask:
 case F_Mask:
 plotOpt.SetSkipPlotNPTH_Pads( false );
 
 // Disable plot pad holes
 plotOpt.SetDrillMarksType( DRILL_MARKS::NO_DRILL_SHAPE );
 
 // Plot solder mask:
 if( soldermask_min_thickness == 0 )
 {
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF )
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 else
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 }
 else
 {
 PlotSolderMaskLayer( aBoard, aPlotter, layer_mask, plotOpt,
 soldermask_min_thickness );
 }
 
 break;
 
 case B_Adhes:
 case F_Adhes:
 case B_Paste:
 case F_Paste:
 plotOpt.SetSkipPlotNPTH_Pads( false );
 
 // Disable plot pad holes
 plotOpt.SetDrillMarksType( DRILL_MARKS::NO_DRILL_SHAPE );
 
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF )
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 else
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 
 break;
 
 case F_SilkS:
 case B_SilkS:
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF && plotOpt.GetDXFPlotPolygonMode() )
 // PlotLayerOutlines() is designed only for DXF plotters.
 // and must not be used for other plot formats
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 else
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 
 // Gerber: Subtract soldermask from silkscreen if enabled
 if( aPlotter->GetPlotterType() == PLOT_FORMAT::GERBER
 && plotOpt.GetSubtractMaskFromSilk() )
 {
 if( aLayer == F_SilkS )
 layer_mask = LSET( F_Mask );
 else
 layer_mask = LSET( B_Mask );
 
 // Create the mask to subtract by creating a negative layer polarity
 aPlotter->SetLayerPolarity( false );
 
 // Disable plot pad holes
 plotOpt.SetDrillMarksType( DRILL_MARKS::NO_DRILL_SHAPE );
 
 // Plot the mask
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 }
 
 break;
 
 // These layers are plotted like silk screen layers.
 // Mainly, pads on these layers are not filled.
 // This is not necessary the best choice.
 case Dwgs_User:
 case Cmts_User:
 case Eco1_User:
 case Eco2_User:
 case Edge_Cuts:
 case Margin:
 case F_CrtYd:
 case B_CrtYd:
 case F_Fab:
 case B_Fab:
 plotOpt.SetSkipPlotNPTH_Pads( false );
 plotOpt.SetDrillMarksType( DRILL_MARKS::NO_DRILL_SHAPE );
 
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF && plotOpt.GetDXFPlotPolygonMode() )
 // PlotLayerOutlines() is designed only for DXF plotters.
 // and must not be used for other plot formats
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 else
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 
 break;
 
 default:
 plotOpt.SetSkipPlotNPTH_Pads( false );
 plotOpt.SetDrillMarksType( DRILL_MARKS::NO_DRILL_SHAPE );
 
 if( plotOpt.GetFormat() == PLOT_FORMAT::DXF && plotOpt.GetDXFPlotPolygonMode() )
 // PlotLayerOutlines() is designed only for DXF plotters.
 // and must not be used for other plot formats
 PlotLayerOutlines( aBoard, aPlotter, layer_mask, plotOpt );
 else
 PlotStandardLayer( aBoard, aPlotter, layer_mask, plotOpt );
 
 break;
 }
 }
}
 
 
void PlotStandardLayer( BOARD* aBoard, PLOTTER* aPlotter, LSET aLayerMask,
 const PCB_PLOT_PARAMS& aPlotOpt )
{
 BRDITEMS_PLOTTER itemplotter( aPlotter, aBoard, aPlotOpt );
 
 itemplotter.SetLayerSet( aLayerMask );
 
 OUTLINE_MODE plotMode = aPlotOpt.GetPlotMode();
 bool onCopperLayer = ( LSET::AllCuMask() & aLayerMask ).any();
 bool onSolderMaskLayer = ( LSET( 2, F_Mask, B_Mask ) & aLayerMask ).any();
 bool onSolderPasteLayer = ( LSET( 2, F_Paste, B_Paste ) & aLayerMask ).any();
 bool onFrontFab = ( LSET( F_Fab ) & aLayerMask ).any();
 bool onBackFab = ( LSET( B_Fab ) & aLayerMask ).any();
 bool sketchPads = ( onFrontFab || onBackFab ) && aPlotOpt.GetSketchPadsOnFabLayers();
 
 // Plot edge layer and graphic items
 itemplotter.PlotBoardGraphicItems();
 
 // Draw footprint texts:
 for( const FOOTPRINT* footprint : aBoard->Footprints() )
 itemplotter.PlotFootprintTextItems( footprint );
 
 // Draw footprint other graphic items:
 for( const FOOTPRINT* footprint : aBoard->Footprints() )
 itemplotter.PlotFootprintGraphicItems( footprint );
 
 // Plot footprint pads
 for( FOOTPRINT* footprint : aBoard->Footprints() )
 {
 aPlotter->StartBlock( nullptr );
 
 for( PAD* pad : footprint->Pads() )
 {
 OUTLINE_MODE padPlotMode = plotMode;
 
 if( !( pad->GetLayerSet() & aLayerMask ).any() )
 {
 if( sketchPads &&
 ( ( onFrontFab && pad->GetLayerSet().Contains( F_Cu ) ) ||
 ( onBackFab && pad->GetLayerSet().Contains( B_Cu ) ) ) )
 {
 padPlotMode = SKETCH;
 }
 else
 {
 continue;
 }
 }
 
 if( onCopperLayer && !pad->FlashLayer( aLayerMask ) )
  continue;
 
 COLOR4D color = COLOR4D::BLACK;
 
 // If we're plotting a single layer, the color for that layer can be used directly.
 if( aLayerMask.count() == 1 )
 {
 color = aPlotOpt.ColorSettings()->GetColor( aLayerMask.Seq()[0] );
 }
 else
 {
 if( ( pad->GetLayerSet() & aLayerMask )[B_Cu] )
 color = aPlotOpt.ColorSettings()->GetColor( B_Cu );
 
 if( ( pad->GetLayerSet() & aLayerMask )[F_Cu] )
 color = color.LegacyMix( aPlotOpt.ColorSettings()->GetColor( F_Cu ) );
 
 if( sketchPads && aLayerMask[F_Fab] )
 color = aPlotOpt.ColorSettings()->GetColor( F_Fab );
 else if( sketchPads && aLayerMask[B_Fab] )
 color = aPlotOpt.ColorSettings()->GetColor( B_Fab );
 }
 
 VECTOR2I margin;
 int width_adj = 0;
 
 if( onCopperLayer )
 width_adj = itemplotter.getFineWidthAdj();
 
 if( onSolderMaskLayer )
 margin.x = margin.y = pad->GetSolderMaskExpansion();
 
  if( onSolderPasteLayer )
 margin = pad->GetSolderPasteMargin();
 
 // not all shapes can have a different margin for x and y axis
 // in fact only oval and rect shapes can have different values.
 // Round shape have always the same x,y margin
 // so define a unique value for other shapes that do not support different values
 int mask_clearance = margin.x;
 
 // Now offset the pad size by margin + width_adj
 VECTOR2I padPlotsSize = pad->GetSize() + margin * 2 + VECTOR2I( width_adj, width_adj );
 
 // Store these parameters that can be modified to plot inflated/deflated pads shape
 PAD_SHAPE padShape = pad->GetShape();
 VECTOR2I padSize = pad->GetSize();
 VECTOR2I padDelta = pad->GetDelta(); // has meaning only for trapezoidal pads
 double padCornerRadius = pad->GetRoundRectCornerRadius();
 
 // Don't draw a 0 sized pad.
 // Note: a custom pad can have its pad anchor with size = 0
 if( pad->GetShape() != PAD_SHAPE::CUSTOM
 && ( padPlotsSize.x <= 0 || padPlotsSize.y <= 0 ) )
 continue;
 
 switch( pad->GetShape() )
 {
 case PAD_SHAPE::CIRCLE:
 case PAD_SHAPE::OVAL:
 pad->SetSize( padPlotsSize );
 
 if( aPlotOpt.GetSkipPlotNPTH_Pads() &&
 ( aPlotOpt.GetDrillMarksType() == DRILL_MARKS::NO_DRILL_SHAPE ) &&
 ( pad->GetSize() == pad->GetDrillSize() ) &&
 ( pad->GetAttribute() == PAD_ATTRIB::NPTH ) )
 {
 break;
 }
 
 itemplotter.PlotPad( pad, color, padPlotMode );
 break;
 
 case PAD_SHAPE::RECT:
 pad->SetSize( padPlotsSize );
 
 if( mask_clearance > 0 )
 {
 pad->SetShape( PAD_SHAPE::ROUNDRECT );
 pad->SetRoundRectCornerRadius( mask_clearance );
 }
 
 itemplotter.PlotPad( pad, color, padPlotMode );
 break;
 
 case PAD_SHAPE::TRAPEZOID:
 // inflate/deflate a trapezoid is a bit complex.
 // so if the margin is not null, build a similar polygonal pad shape,
 // and inflate/deflate the polygonal shape
 // because inflating/deflating using different values for y and y
 // we are using only margin.x as inflate/deflate value
 if( mask_clearance == 0 )
 {
 itemplotter.PlotPad( pad, color, padPlotMode );
 }
 else
 {
 PAD dummy( *pad );
 dummy.SetAnchorPadShape( PAD_SHAPE::CIRCLE );
 dummy.SetShape( PAD_SHAPE::CUSTOM );
 SHAPE_POLY_SET outline;
 outline.NewOutline();
 int dx = padSize.x / 2;
 int dy = padSize.y / 2;
 int ddx = padDelta.x / 2;
 int ddy = padDelta.y / 2;
 
 outline.Append( -dx - ddy, dy + ddx );
 outline.Append( dx + ddy, dy - ddx );
 outline.Append( dx - ddy, -dy + ddx );
 outline.Append( -dx + ddy, -dy - ddx );
 
 // Shape polygon can have holes so use InflateWithLinkedHoles(), not Inflate()
 // which can create bad shapes if margin.x is < 0
 int maxError = aBoard->GetDesignSettings().m_MaxError;
 int numSegs = GetArcToSegmentCount( mask_clearance, maxError, FULL_CIRCLE );
 outline.InflateWithLinkedHoles( mask_clearance, numSegs,
 SHAPE_POLY_SET::PM_FAST );
 dummy.DeletePrimitivesList();
 dummy.AddPrimitivePoly( outline, 0, true );
 
 // Be sure the anchor pad is not bigger than the deflated shape because this
 // anchor will be added to the pad shape when plotting the pad. So now the
 // polygonal shape is built, we can clamp the anchor size
 dummy.SetSize( wxSize( 0,0 ) );
 
 itemplotter.PlotPad( &dummy, color, padPlotMode );
 }
 
 break;
 
 case PAD_SHAPE::ROUNDRECT:
 {
 // rounding is stored as a percent, but we have to change the new radius
 // to initial_radius + clearance to have a inflated/deflated similar shape
 int initial_radius = pad->GetRoundRectCornerRadius();
 pad->SetSize( padPlotsSize );
 pad->SetRoundRectCornerRadius( std::max( initial_radius + mask_clearance, 0 ) );
 
 itemplotter.PlotPad( pad, color, padPlotMode );
 break;
 }
 
 case PAD_SHAPE::CHAMFERED_RECT:
 if( mask_clearance == 0 )
 {
 // the size can be slightly inflated by width_adj (PS/PDF only)
 pad->SetSize( padPlotsSize );
 itemplotter.PlotPad( pad, color, padPlotMode );
 }
 else
 {
 // Due to the polygonal shape of a CHAMFERED_RECT pad, the best way is to
 // convert the pad shape to a full polygon, inflate/deflate the polygon
 // and use a dummy CUSTOM pad to plot the final shape.
 PAD dummy( *pad );
 // Build the dummy pad outline with coordinates relative to the pad position
 // and orientation 0. The actual pos and rotation will be taken in account
 // later by the plot function
 dummy.SetPosition( VECTOR2I( 0, 0 ) );
 dummy.SetOrientation( ANGLE_0 );
 SHAPE_POLY_SET outline;
 int maxError = aBoard->GetDesignSettings().m_MaxError;
 int numSegs = GetArcToSegmentCount( mask_clearance, maxError, FULL_CIRCLE );
 dummy.TransformShapeToPolygon( outline, UNDEFINED_LAYER, 0, maxError,
 ERROR_INSIDE );
 outline.InflateWithLinkedHoles( mask_clearance, numSegs,
 SHAPE_POLY_SET::PM_FAST );
 
 // Initialize the dummy pad shape:
 dummy.SetAnchorPadShape( PAD_SHAPE::CIRCLE );
 dummy.SetShape( PAD_SHAPE::CUSTOM );
 dummy.DeletePrimitivesList();
 dummy.AddPrimitivePoly( outline, 0, true );
 
 // Be sure the anchor pad is not bigger than the deflated shape because this
 // anchor will be added to the pad shape when plotting the pad.
 // So we set the anchor size to 0
 dummy.SetSize( wxSize( 0,0 ) );
 dummy.SetPosition( pad->GetPosition() );
 dummy.SetOrientation( pad->GetOrientation() );
 
 itemplotter.PlotPad( &dummy, color, padPlotMode );
 }
 
 break;
 
 case PAD_SHAPE::CUSTOM:
 {
 // inflate/deflate a custom shape is a bit complex.
 // so build a similar pad shape, and inflate/deflate the polygonal shape
 PAD dummy( *pad );
 SHAPE_POLY_SET shape;
 pad->MergePrimitivesAsPolygon( &shape );
 
 // Shape polygon can have holes so use InflateWithLinkedHoles(), not Inflate()
 // which can create bad shapes if margin.x is < 0
 int maxError = aBoard->GetDesignSettings().m_MaxError;
 int numSegs = GetArcToSegmentCount( mask_clearance, maxError, FULL_CIRCLE );
 shape.InflateWithLinkedHoles( mask_clearance, numSegs, SHAPE_POLY_SET::PM_FAST );
 dummy.DeletePrimitivesList();
 dummy.AddPrimitivePoly( shape, 0, true );
 
 // Be sure the anchor pad is not bigger than the deflated shape because this
 // anchor will be added to the pad shape when plotting the pad. So now the
 // polygonal shape is built, we can clamp the anchor size
 if( mask_clearance < 0 ) // we expect margin.x = margin.y for custom pads
 dummy.SetSize( padPlotsSize );
 
 itemplotter.PlotPad( &dummy, color, padPlotMode );
 break;
 }
 }
 
 // Restore the pad parameters modified by the plot code
 pad->SetSize( padSize );
 pad->SetDelta( padDelta );
 pad->SetShape( padShape );
 pad->SetRoundRectCornerRadius( padCornerRadius );
 }
 
 aPlotter->EndBlock( nullptr );
 aPlotter->Bookmark( footprint->GetBoundingBox(), footprint->GetReference(), _( "Footprints" ) );
 }
 
 // Plot vias on copper layers, and if aPlotOpt.GetPlotViaOnMaskLayer() is true,
 // plot them on solder mask
 
 GBR_METADATA gbr_metadata;
 
 bool isOnCopperLayer = ( aLayerMask & LSET::AllCuMask() ).any();
 
 if( isOnCopperLayer )
 {
 gbr_metadata.SetApertureAttrib( GBR_APERTURE_METADATA::GBR_APERTURE_ATTRIB_VIAPAD );
 gbr_metadata.SetNetAttribType( GBR_NETLIST_METADATA::GBR_NETINFO_NET );
 }
 
 aPlotter->StartBlock( nullptr );
 
 for( const PCB_TRACK* track : aBoard->Tracks() )
 {
 const PCB_VIA* via = dyn_cast<const PCB_VIA*>( track );
 
 if( !via )
 continue;
 
 // vias are not plotted if not on selected layer, but if layer is SOLDERMASK_LAYER_BACK
 // or SOLDERMASK_LAYER_FRONT, vias are drawn only if they are on the corresponding
 // external copper layer
 LSET via_mask_layer = via->GetLayerSet();
 
 if( aPlotOpt.GetPlotViaOnMaskLayer() )
 {
 if( via_mask_layer[B_Cu] )
 via_mask_layer.set( B_Mask );
 
 if( via_mask_layer[F_Cu] )
 via_mask_layer.set( F_Mask );
 }
 
 if( !( via_mask_layer & aLayerMask ).any() )
 continue;
 
 int via_margin = 0;
 double width_adj = 0;
 
 if( aLayerMask[B_Mask] || aLayerMask[F_Mask] )
 via_margin = via->GetSolderMaskExpansion();
 
 if( ( aLayerMask & LSET::AllCuMask() ).any() )
 width_adj = itemplotter.getFineWidthAdj();
 
 int diameter = via->GetWidth() + 2 * via_margin + width_adj;
 
 if( onCopperLayer && !via->FlashLayer( aLayerMask ) )
 continue;
 
 // Don't draw a null size item :
 if( diameter <= 0 )
 continue;
 
 // Some vias can be not connected (no net).
 // Set the m_NotInNet for these vias to force a empty net name in gerber file
 gbr_metadata.m_NetlistMetadata.m_NotInNet = via->GetNetname().IsEmpty();
 
 gbr_metadata.SetNetName( via->GetNetname() );
 
 COLOR4D color = aPlotOpt.ColorSettings()->GetColor(
 LAYER_VIAS + static_cast<int>( via->GetViaType() ) );
 
 // Set plot color (change WHITE to LIGHTGRAY because the white items are not seen on a
 // white paper or screen
 aPlotter->SetColor( color != WHITE ? color : LIGHTGRAY );
 aPlotter->FlashPadCircle( via->GetStart(), diameter, plotMode, &gbr_metadata );
 }
 
 aPlotter->EndBlock( nullptr );
 aPlotter->StartBlock( nullptr );
 gbr_metadata.SetApertureAttrib( GBR_APERTURE_METADATA::GBR_APERTURE_ATTRIB_CONDUCTOR );
 
 // Plot tracks (not vias) :
 for( const PCB_TRACK* track : aBoard->Tracks() )
 {
 if( track->Type() == PCB_VIA_T )
 continue;
 
 if( !aLayerMask[track->GetLayer()] )
 continue;
 
 // Some track segments can be not connected (no net).
 // Set the m_NotInNet for these segments to force a empty net name in gerber file
 gbr_metadata.m_NetlistMetadata.m_NotInNet = track->GetNetname().IsEmpty();
 
 gbr_metadata.SetNetName( track->GetNetname() );
 int width = track->GetWidth() + itemplotter.getFineWidthAdj();
 aPlotter->SetColor( itemplotter.getColor( track->GetLayer() ) );
 
 if( track->Type() == PCB_ARC_T )
 {
 const PCB_ARC* arc = static_cast<const PCB_ARC*>( track );
 
 // ThickArc expects only positive angle arcs, so flip start/end if
 // we are negative
 if( arc->GetAngle() < ANGLE_0 )
 {
 aPlotter->ThickArc( arc->GetCenter(), arc->GetEnd(), arc->GetStart(),
 width, plotMode, &gbr_metadata );
 }
 else
 {
 aPlotter->ThickArc( arc->GetCenter(), arc->GetStart(), arc->GetEnd(),
 width, plotMode, &gbr_metadata );
 }
 }
 else
 {
 aPlotter->ThickSegment( track->GetStart(), track->GetEnd(), width, plotMode,
 &gbr_metadata );
 }
 }
 
 aPlotter->EndBlock( nullptr );
 
 // Plot filled ares
 aPlotter->StartBlock( nullptr );
 
 NETINFO_ITEM nonet( aBoard );
 
 for( const ZONE* zone : aBoard->Zones() )
 {
 for( PCB_LAYER_ID layer : zone->GetLayerSet().Seq() )
 {
 if( !aLayerMask[layer] )
 continue;
 
 SHAPE_POLY_SET mainArea = zone->GetFilledPolysList( layer )->CloneDropTriangulation();
 SHAPE_POLY_SET islands;
 
 for( int i = mainArea.OutlineCount() - 1; i >= 0; i-- )
 {
 if( zone->IsIsland( layer, i ) )
 {
 islands.AddOutline( mainArea.CPolygon( i )[0] );
 mainArea.DeletePolygon( i );
 }
 }
 
 itemplotter.PlotFilledAreas( zone, layer, mainArea );
 
 if( !islands.IsEmpty() )
 {
 ZONE dummy( *zone );
 dummy.SetNet( &nonet );
 itemplotter.PlotFilledAreas( &dummy, layer, islands );
 }
 }
 }
 
 aPlotter->EndBlock( nullptr );
 
 // Adding drill marks, if required and if the plotter is able to plot them:
 if( aPlotOpt.GetDrillMarksType() != DRILL_MARKS::NO_DRILL_SHAPE )
 itemplotter.PlotDrillMarks();
}
 
 
void PlotLayerOutlines( BOARD* aBoard, PLOTTER* aPlotter, LSET aLayerMask,
 const PCB_PLOT_PARAMS& aPlotOpt )
{
 BRDITEMS_PLOTTER itemplotter( aPlotter, aBoard, aPlotOpt );
 itemplotter.SetLayerSet( aLayerMask );
 
 SHAPE_POLY_SET outlines;
 
 for( LSEQ seq = aLayerMask.Seq( aLayerMask.SeqStackupBottom2Top() ); seq; ++seq )
 {
 PCB_LAYER_ID layer = *seq;
 
 outlines.RemoveAllContours();
 aBoard->ConvertBrdLayerToPolygonalContours( layer, outlines );
 
 outlines.Simplify( SHAPE_POLY_SET::PM_FAST );
 
 // Plot outlines
 std::vector<VECTOR2I> cornerList;
 
 // Now we have one or more basic polygons: plot each polygon
 for( int ii = 0; ii < outlines.OutlineCount(); ii++ )
 {
 for( int kk = 0; kk <= outlines.HoleCount(ii); kk++ )
 {
 cornerList.clear();
 const SHAPE_LINE_CHAIN& path =
 ( kk == 0 ) ? outlines.COutline( ii ) : outlines.CHole( ii, kk - 1 );
 
 aPlotter->PlotPoly( path, FILL_T::NO_FILL );
 }
 }
 
 // Plot pad holes
 if( aPlotOpt.GetDrillMarksType() != DRILL_MARKS::NO_DRILL_SHAPE )
 {
 int smallDrill = ( aPlotOpt.GetDrillMarksType() == DRILL_MARKS::SMALL_DRILL_SHAPE )
 ? pcbIUScale.mmToIU( ADVANCED_CFG::GetCfg().m_SmallDrillMarkSize ) :
 INT_MAX;
 
 for( FOOTPRINT* footprint : aBoard->Footprints() )
 {
 for( PAD* pad : footprint->Pads() )
 {
 if( pad->HasHole() )
 {
 std::shared_ptr<SHAPE_SEGMENT> slot = pad->GetEffectiveHoleShape();
 
 if( slot->GetSeg().A == slot->GetSeg().B ) // circular hole
 {
 int drill = std::min( smallDrill, slot->GetWidth() );
 aPlotter->Circle( pad->GetPosition(), drill, FILL_T::NO_FILL );
 }
 else
 {
 // Note: small drill marks have no significance when applied to slots
 aPlotter->ThickSegment( slot->GetSeg().A,
 slot->GetSeg().B,
 slot->GetWidth(), SKETCH, nullptr );
 }
 }
 }
 }
 }
 
 // Plot vias holes
 for( PCB_TRACK* track : aBoard->Tracks() )
 {
 const PCB_VIA* via = dyn_cast<const PCB_VIA*>( track );
 
 if( via && via->IsOnLayer( layer ) ) // via holes can be not through holes
 aPlotter->Circle( via->GetPosition(), via->GetDrillValue(), FILL_T::NO_FILL );
 }
 }
}
 
 
#define NEW_ALGO 1
 
void PlotSolderMaskLayer( BOARD *aBoard, PLOTTER* aPlotter, LSET aLayerMask,
 const PCB_PLOT_PARAMS& aPlotOpt, int aMinThickness )
{
 int maxError = aBoard->GetDesignSettings().m_MaxError;
 PCB_LAYER_ID layer = aLayerMask[B_Mask] ? B_Mask : F_Mask;
 SHAPE_POLY_SET buffer;
 SHAPE_POLY_SET* boardOutline = nullptr;
 
 if( aBoard->GetBoardPolygonOutlines( buffer ) )
 boardOutline = &buffer;
 
 // We remove 1nm as we expand both sides of the shapes, so allowing for a strictly greater
 // than or equal comparison in the shape separation (boolean add)
 int inflate = aMinThickness / 2 - 1;
 
 BRDITEMS_PLOTTER itemplotter( aPlotter, aBoard, aPlotOpt );
 itemplotter.SetLayerSet( aLayerMask );
 
 for( FOOTPRINT* footprint : aBoard->Footprints() )
 itemplotter.PlotFootprintTextItems( footprint );
 
 // Build polygons for each pad shape. The size of the shape on solder mask should be size
 // of pad + clearance around the pad, where clearance = solder mask clearance + extra margin.
 // Extra margin is half the min width for solder mask, which is used to merge too-close shapes
 // (distance < aMinThickness), and will be removed when creating the actual shapes.
 
 // Will contain shapes inflated by inflate value that will be merged and deflated by
 // inflate value to build final polygons
 // After calculations the remaining polygons are polygons to plot
 SHAPE_POLY_SET areas;
 
 // Will contain exact shapes of all items on solder mask
 SHAPE_POLY_SET initialPolys;
 
#if NEW_ALGO
 // Generate polygons with arcs inside the shape or exact shape to minimize shape changes
 // created by arc to segment size correction.
 DISABLE_ARC_RADIUS_CORRECTION disabler;
#endif
 {
 // Plot footprint pads and graphics
 for( const FOOTPRINT* footprint : aBoard->Footprints() )
 {
 // add shapes with their exact mask layer size in initialPolys
 footprint->TransformPadsToPolySet( initialPolys, layer, 0, maxError, ERROR_OUTSIDE );
 // add shapes inflated by aMinThickness/2 in areas
 footprint->TransformPadsToPolySet( areas, layer, inflate, maxError, ERROR_OUTSIDE );
 
 for( const BOARD_ITEM* item : footprint->GraphicalItems() )
 {
 if( item->Type() == PCB_FP_SHAPE_T && item->IsOnLayer( layer ) )
 {
 // add shapes with their exact mask layer size in initialPolys
 item->TransformShapeToPolygon( initialPolys, layer, 0, maxError, ERROR_OUTSIDE );
 
 // add shapes inflated by aMinThickness/2 in areas
 item->TransformShapeToPolygon( areas, layer, inflate, maxError, ERROR_OUTSIDE );
 }
 else if( item->Type() == PCB_FP_SHAPE_T && item->IsOnLayer( Edge_Cuts ) )
 {
 itemplotter.PlotFootprintShape( static_cast<const FP_SHAPE*>( item ) );
 }
 }
 }
 
 // Plot (untented) vias
 for( const PCB_TRACK* track : aBoard->Tracks() )
 {
 const PCB_VIA* via = dyn_cast<const PCB_VIA*>( track );
 
 // Note: IsOnLayer() checks relevant mask layers of untented vias
 if( !via || !via->IsOnLayer( layer ) )
 continue;
 
 int clearance = via->GetSolderMaskExpansion();
 
 // add shapes with their exact mask layer size in initialPolys
 via->TransformShapeToPolygon( initialPolys, layer, clearance, maxError, ERROR_OUTSIDE );
 
 // add shapes inflated by aMinThickness/2 in areas
 clearance += inflate;
 via->TransformShapeToPolygon( areas, layer, clearance, maxError, ERROR_OUTSIDE );
 }
 
 // Add filled zone areas.
#if 0 // Set to 1 if a solder mask expansion must be applied to zones on solder mask
 int zone_margin = aBoard->GetDesignSettings().m_SolderMaskExpansion;
#else
 int zone_margin = 0;
#endif
 
 for( const BOARD_ITEM* item : aBoard->Drawings() )
 {
 if( item->IsOnLayer( layer ) )
 {
 // add shapes with their exact mask layer size in initialPolys
 item->TransformShapeToPolygon( initialPolys, layer, 0, maxError, ERROR_OUTSIDE );
 // add shapes inflated by aMinThickness/2 in areas
 item->TransformShapeToPolygon( areas, layer, inflate, maxError, ERROR_OUTSIDE );
 }
 else if( item->IsOnLayer( Edge_Cuts ) )
 {
 itemplotter.PlotPcbGraphicItem( item );
 }
 }
 
 for( ZONE* zone : aBoard->Zones() )
  {
 if( !zone->IsOnLayer( layer ) )
 continue;
 
 // add shapes inflated by aMinThickness/2 in areas
 zone->TransformSmoothedOutlineToPolygon( areas, inflate + zone_margin, maxError,
 ERROR_OUTSIDE, boardOutline );
 
 // add shapes with their exact mask layer size in initialPolys
 zone->TransformSmoothedOutlineToPolygon( initialPolys, zone_margin, maxError,
 ERROR_OUTSIDE, boardOutline );
 }
 }
 
 int numSegs = GetArcToSegmentCount( inflate, maxError, FULL_CIRCLE );
 
 // Merge all polygons: After deflating, not merged (not overlapping) polygons
 // will have the initial shape (with perhaps small changes due to deflating transform)
 areas.Simplify( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 areas.Deflate( inflate, numSegs );
 
#if !NEW_ALGO
 // To avoid a lot of code, use a ZONE to handle and plot polygons, because our polygons look
 // exactly like filled areas in zones.
 // Note, also this code is not optimized: it creates a lot of copy/duplicate data.
 // However it is not complex, and fast enough for plot purposes (copy/convert data is only a
 // very small calculation time for these calculations).
 ZONE zone( aBoard );
 zone.SetMinThickness( 0 ); // trace polygons only
 zone.SetLayer( layer );
 
 // Combine the current areas to initial areas. This is mandatory because inflate/deflate
 // transform is not perfect, and we want the initial areas perfectly kept
 areas.BooleanAdd( initialPolys, SHAPE_POLY_SET::PM_FAST );
 areas.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 
 itemplotter.PlotFilledAreas( &zone, layer, areas );
#else
 
 // Remove initial shapes: each shape will be added later, as flashed item or region
 // with a suitable attribute.
 // Do not merge pads is mandatory in Gerber files: They must be identified as pads
 
 // we deflate areas in polygons, to avoid after subtracting initial shapes
 // having small artifacts due to approximations during polygon transforms
 areas.BooleanSubtract( initialPolys, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 
 // Slightly inflate polygons to avoid any gap between them and other shapes,
 // These gaps are created by arc to segments approximations
 areas.Inflate( pcbIUScale.mmToIU( 0.002 ), 6 );
 
 // Now, only polygons with a too small thickness are stored in areas.
 areas.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
 
 // Plot each initial shape (pads and polygons on mask layer), with suitable attributes:
 PlotStandardLayer( aBoard, aPlotter, aLayerMask, aPlotOpt );
 
 for( int ii = 0; ii < areas.OutlineCount(); ii++ )
 {
 const SHAPE_LINE_CHAIN& path = areas.COutline( ii );
 
 // polygon area in mm^2 :
 double curr_area = path.Area() / ( pcbIUScale.IU_PER_MM * pcbIUScale.IU_PER_MM );
 
 // Skip very small polygons: they are certainly artifacts created by
 // arc approximations and polygon transforms
 // (inflate/deflate transforms)
 constexpr double poly_min_area_mm2 = 0.01; // 0.01 mm^2 gives a good filtering
 
 if( curr_area < poly_min_area_mm2 )
 continue;
 
 aPlotter->PlotPoly( path, FILL_T::FILLED_SHAPE );
 }
#endif
}
 
 
static void initializePlotter( PLOTTER* aPlotter, const BOARD* aBoard,
 const PCB_PLOT_PARAMS* aPlotOpts )
{
 PAGE_INFO pageA4( wxT( "A4" ) );
 const PAGE_INFO& pageInfo = aBoard->GetPageSettings();
 const PAGE_INFO* sheet_info;
 double paperscale; // Page-to-paper ratio
 wxSize paperSizeIU;
 wxSize pageSizeIU( pageInfo.GetSizeIU( pcbIUScale.IU_PER_MILS ) );
 bool autocenter = false;
 
 // Special options: to fit the sheet to an A4 sheet replace the paper size. However there
 // is a difference between the autoscale and the a4paper option:
 // - Autoscale fits the board to the paper size
 // - A4paper fits the original paper size to an A4 sheet
 // - Both of them fit the board to an A4 sheet
 if( aPlotOpts->GetA4Output() )
 {
 sheet_info = &pageA4;
 paperSizeIU = pageA4.GetSizeIU( pcbIUScale.IU_PER_MILS );
 paperscale = (double) paperSizeIU.x / pageSizeIU.x;
 autocenter = true;
 }
 else
 {
 sheet_info = &pageInfo;
 paperSizeIU = pageSizeIU;
 paperscale = 1;
 
 // Need autocentering only if scale is not 1:1
 autocenter = (aPlotOpts->GetScale() != 1.0);
 }
 
 BOX2I bbox = aBoard->ComputeBoundingBox();
 VECTOR2I boardCenter = bbox.Centre();
 VECTOR2I boardSize = bbox.GetSize();
 
 double compound_scale;
 
 // Fit to 80% of the page if asked; it could be that the board is empty, in this case
 // regress to 1:1 scale
 if( aPlotOpts->GetAutoScale() && boardSize.x > 0 && boardSize.y > 0 )
 {
 double xscale = (paperSizeIU.x * 0.8) / boardSize.x;
 double yscale = (paperSizeIU.y * 0.8) / boardSize.y;
 
 compound_scale = std::min( xscale, yscale ) * paperscale;
 }
 else
 {
 compound_scale = aPlotOpts->GetScale() * paperscale;
 }
 
 // For the plot offset we have to keep in mind the auxiliary origin too: if autoscaling is
 // off we check that plot option (i.e. autoscaling overrides auxiliary origin)
 VECTOR2I offset( 0, 0);
 
 if( autocenter )
 {
 offset.x = KiROUND( boardCenter.x - ( paperSizeIU.x / 2.0 ) / compound_scale );
 offset.y = KiROUND( boardCenter.y - ( paperSizeIU.y / 2.0 ) / compound_scale );
 }
 else
 {
 if( aPlotOpts->GetUseAuxOrigin() )
 offset = aBoard->GetDesignSettings().GetAuxOrigin();
 }
 
 aPlotter->SetPageSettings( *sheet_info );
 
 aPlotter->SetViewport( offset, pcbIUScale.IU_PER_MILS/10, compound_scale, aPlotOpts->GetMirror() );
 
 // Has meaning only for gerber plotter. Must be called only after SetViewport
 aPlotter->SetGerberCoordinatesFormat( aPlotOpts->GetGerberPrecision() );
 
 // Has meaning only for SVG plotter. Must be called only after SetViewport
 aPlotter->SetSvgCoordinatesFormat( aPlotOpts->GetSvgPrecision() );
 
 aPlotter->SetCreator( wxT( "PCBNEW" ) );
 aPlotter->SetColorMode( !aPlotOpts->GetBlackAndWhite() ); // default is plot in Black and White.
 aPlotter->SetTextMode( aPlotOpts->GetTextMode() );
}
 
 
static void FillNegativeKnockout( PLOTTER *aPlotter, const BOX2I &aBbbox )
{
 const int margin = 5 * pcbIUScale.IU_PER_MM; // Add a 5 mm margin around the board
 aPlotter->SetNegative( true );
 aPlotter->SetColor( WHITE ); // Which will be plotted as black
 
 BOX2I area = aBbbox;
 area.Inflate( margin );
 aPlotter->Rect( area.GetOrigin(), area.GetEnd(), FILL_T::FILLED_SHAPE );
 aPlotter->SetColor( BLACK );
}
 
 
static void ConfigureHPGLPenSizes( HPGL_PLOTTER *aPlotter, const PCB_PLOT_PARAMS *aPlotOpts )
{
 // Compute penDiam (the value is given in mils) in pcb units, with plot scale (if Scale is 2,
 // penDiam value is always m_HPGLPenDiam so apparent penDiam is actually penDiam / Scale
 int penDiam = KiROUND( aPlotOpts->GetHPGLPenDiameter() * pcbIUScale.IU_PER_MILS / aPlotOpts->GetScale() );
 
 // Set HPGL-specific options and start
 aPlotter->SetPenSpeed( aPlotOpts->GetHPGLPenSpeed() );
 aPlotter->SetPenNumber( aPlotOpts->GetHPGLPenNum() );
 aPlotter->SetPenDiameter( penDiam );
}
 
 
PLOTTER* StartPlotBoard( BOARD *aBoard, const PCB_PLOT_PARAMS *aPlotOpts, int aLayer,
 const wxString& aFullFileName, const wxString& aSheetName,
 const wxString& aSheetPath )
{
 // Create the plotter driver and set the few plotter specific options
 PLOTTER* plotter = nullptr;
 
 switch( aPlotOpts->GetFormat() )
 {
 case PLOT_FORMAT::DXF:
 DXF_PLOTTER* DXF_plotter;
 DXF_plotter = new DXF_PLOTTER();
 DXF_plotter->SetUnits( aPlotOpts->GetDXFPlotUnits() );
 
 plotter = DXF_plotter;
 break;
 
 case PLOT_FORMAT::POST:
 PS_PLOTTER* PS_plotter;
 PS_plotter = new PS_PLOTTER();
 PS_plotter->SetScaleAdjust( aPlotOpts->GetFineScaleAdjustX(),
 aPlotOpts->GetFineScaleAdjustY() );
 plotter = PS_plotter;
 break;
 
 case PLOT_FORMAT::PDF:
 plotter = new PDF_PLOTTER();
 break;
 
 case PLOT_FORMAT::HPGL:
 HPGL_PLOTTER* HPGL_plotter;
 HPGL_plotter = new HPGL_PLOTTER();
 
 // HPGL options are a little more convoluted to compute, so they get their own function
 ConfigureHPGLPenSizes( HPGL_plotter, aPlotOpts );
 plotter = HPGL_plotter;
 break;
 
 case PLOT_FORMAT::GERBER:
 // For Gerber plotter, a valid board layer must be set, in order to create a valid
 // Gerber header, especially the TF.FileFunction and .FilePolarity data
 if( aLayer < PCBNEW_LAYER_ID_START || aLayer >= PCB_LAYER_ID_COUNT )
 {
 wxLogError( wxString::Format(
 "Invalid board layer %d, cannot build a valid Gerber file header",
 aLayer ) );
 }
 
 plotter = new GERBER_PLOTTER();
 break;
 
 case PLOT_FORMAT::SVG:
 plotter = new SVG_PLOTTER();
 break;
 
 default:
 wxASSERT( false );
 return nullptr;
 }
 
 KIGFX::PCB_RENDER_SETTINGS* renderSettings = new KIGFX::PCB_RENDER_SETTINGS();
 renderSettings->LoadColors( aPlotOpts->ColorSettings() );
 renderSettings->SetDefaultPenWidth( pcbIUScale.mmToIU( 0.0212 ) ); // Hairline at 1200dpi
 
 if( aLayer >= 0 && aLayer < GAL_LAYER_ID_END )
 renderSettings->SetLayerName( aBoard->GetLayerName( ToLAYER_ID( aLayer ) ) );
 
 plotter->SetRenderSettings( renderSettings );
 
 // Compute the viewport and set the other options
 
 // page layout is not mirrored, so temporarily change mirror option for the page layout
 PCB_PLOT_PARAMS plotOpts = *aPlotOpts;
 
 if( plotOpts.GetPlotFrameRef() && plotOpts.GetMirror() )
 plotOpts.SetMirror( false );
 
 initializePlotter( plotter, aBoard, &plotOpts );
 
 if( plotter->OpenFile( aFullFileName ) )
 {
 plotter->ClearHeaderLinesList();
 
 // For the Gerber "file function" attribute, set the layer number
 if( plotter->GetPlotterType() == PLOT_FORMAT::GERBER )
 {
 bool useX2mode = plotOpts.GetUseGerberX2format();
 
 GERBER_PLOTTER* gbrplotter = static_cast <GERBER_PLOTTER*> ( plotter );
 gbrplotter->DisableApertMacros( plotOpts.GetDisableGerberMacros() );
 gbrplotter->UseX2format( useX2mode );
 gbrplotter->UseX2NetAttributes( plotOpts.GetIncludeGerberNetlistInfo() );
 
 // Attributes can be added using X2 format or as comment (X1 format)
 AddGerberX2Attribute( plotter, aBoard, aLayer, not useX2mode );
 }
 
 plotter->StartPlot( wxT( "1" ) );
 
 // Plot the frame reference if requested
 if( aPlotOpts->GetPlotFrameRef() )
 {
 PlotDrawingSheet( plotter, aBoard->GetProject(), aBoard->GetTitleBlock(),
 aBoard->GetPageSettings(), &aBoard->GetProperties(), wxT( "1" ), 1,
 aSheetName, aSheetPath, aBoard->GetFileName() );
 
 if( aPlotOpts->GetMirror() )
 initializePlotter( plotter, aBoard, aPlotOpts );
 }
 
 // When plotting a negative board: draw a black rectangle (background for plot board
 // in white) and switch the current color to WHITE; note the color inversion is actually
 // done in the driver (if supported)
 if( aPlotOpts->GetNegative() )
 {
 BOX2I bbox = aBoard->ComputeBoundingBox();
 FillNegativeKnockout( plotter, bbox );
 }
 
 return plotter;
 }
 
 delete plotter->RenderSettings();
 delete plotter;
 return nullptr;
}