pcb_painter.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2013-2019 CERN
 * Copyright (C) 2021-2024 KiCad Developers, see AUTHORS.txt for contributors.
 *
 * @author Tomasz Wlostowski <[email protected]>
 * @author Maciej Suminski <[email protected]>
 *
 * 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 <board.h>
#include <board_design_settings.h>
#include <pcb_track.h>
#include <pcb_group.h>
#include <footprint.h>
#include <pad.h>
#include <pcb_shape.h>
#include <string_utils.h>
#include <zone.h>
#include <pcb_reference_image.h>
#include <pcb_text.h>
#include <pcb_textbox.h>
#include <pcb_table.h>
#include <pcb_tablecell.h>
#include <pcb_marker.h>
#include <pcb_dimension.h>
#include <pcb_target.h>
 
#include <layer_ids.h>
#include <lset.h>
#include <pcb_painter.h>
#include <pcb_display_options.h>
#include <project/net_settings.h>
#include <settings/color_settings.h>
#include <settings/common_settings.h>
#include <settings/settings_manager.h>
#include <settings/cvpcb_settings.h>
#include <pcbnew_settings.h>
#include <footprint_editor_settings.h>
 
#include <convert_basic_shapes_to_polygon.h>
#include <gal/graphics_abstraction_layer.h>
#include <callback_gal.h>
#include <geometry/geometry_utils.h>
#include <geometry/shape_line_chain.h>
#include <geometry/shape_rect.h>
#include <geometry/shape_segment.h>
#include <geometry/shape_simple.h>
#include <geometry/shape_circle.h>
#include <bezier_curves.h>
#include <kiface_base.h>
#include <gr_text.h>
#include <pgm_base.h>
 
using namespace KIGFX;
 
 
PCBNEW_SETTINGS* pcbconfig()
{
 return dynamic_cast<PCBNEW_SETTINGS*>( Kiface().KifaceSettings() );
}
 
// Helpers for display options existing in Cvpcb and Pcbnew
// Note, when running Cvpcb, pcbconfig() returns nullptr and viewer_settings()
// returns the viewer options existing to Cvpcb and Pcbnew
PCB_VIEWERS_SETTINGS_BASE* PCB_PAINTER::viewer_settings()
{
 switch( m_frameType )
 {
 case FRAME_PCB_EDITOR:
 case FRAME_PCB_DISPLAY3D:
 default:
 return Pgm().GetSettingsManager().GetAppSettings<PCBNEW_SETTINGS>();
 
 case FRAME_FOOTPRINT_EDITOR:
 case FRAME_FOOTPRINT_WIZARD:
 return Pgm().GetSettingsManager().GetAppSettings<FOOTPRINT_EDITOR_SETTINGS>();
 
 case FRAME_FOOTPRINT_VIEWER:
 case FRAME_FOOTPRINT_CHOOSER:
 case FRAME_FOOTPRINT_PREVIEW:
 case FRAME_CVPCB:
 case FRAME_CVPCB_DISPLAY:
 return Pgm().GetSettingsManager().GetAppSettings<CVPCB_SETTINGS>();
 }
}
 
 
PCB_RENDER_SETTINGS::PCB_RENDER_SETTINGS()
{
 m_backgroundColor = COLOR4D( 0.0, 0.0, 0.0, 1.0 );
 m_ZoneDisplayMode = ZONE_DISPLAY_MODE::SHOW_FILLED;
 m_netColorMode = NET_COLOR_MODE::RATSNEST;
 m_ContrastModeDisplay = HIGH_CONTRAST_MODE::NORMAL;
 
 m_trackOpacity = 1.0;
 m_viaOpacity = 1.0;
 m_padOpacity = 1.0;
 m_zoneOpacity = 1.0;
 m_imageOpacity = 1.0;
 m_filledShapeOpacity = 1.0;
 
 m_ForcePadSketchModeOn = false;
 
 m_PadEditModePad = nullptr;
 
 SetDashLengthRatio( 12 ); // From ISO 128-2
 SetGapLengthRatio( 3 ); // From ISO 128-2
 
 m_ForceShowFieldsWhenFPSelected = true;
 
 update();
}
 
 
void PCB_RENDER_SETTINGS::LoadColors( const COLOR_SETTINGS* aSettings )
{
 SetBackgroundColor( aSettings->GetColor( LAYER_PCB_BACKGROUND ) );
 
 // Init board layers colors:
 for( int i = 0; i < PCB_LAYER_ID_COUNT; i++ )
 {
 m_layerColors[i] = aSettings->GetColor( i );
 
 // Guard: if the alpha channel is too small, the layer is not visible.
 if( m_layerColors[i].a < 0.2 )
 m_layerColors[i].a = 0.2;
 }
 
 // Init specific graphic layers colors:
 for( int i = GAL_LAYER_ID_START; i < GAL_LAYER_ID_END; i++ )
 m_layerColors[i] = aSettings->GetColor( i );
 
 // Colors for layers that aren't theme-able
 m_layerColors[LAYER_PAD_PLATEDHOLES] = aSettings->GetColor( LAYER_PCB_BACKGROUND );
 m_layerColors[LAYER_VIA_NETNAMES] = COLOR4D( 0.2, 0.2, 0.2, 0.9 );
 m_layerColors[LAYER_PAD_NETNAMES] = COLOR4D( 1.0, 1.0, 1.0, 0.9 );
 m_layerColors[LAYER_PADS_SMD_FR] = aSettings->GetColor( F_Cu );
 m_layerColors[LAYER_PADS_SMD_BK] = aSettings->GetColor( B_Cu );
 m_layerColors[LAYER_PAD_FR_NETNAMES] = COLOR4D( 1.0, 1.0, 1.0, 0.9 );
 m_layerColors[LAYER_PAD_BK_NETNAMES] = COLOR4D( 1.0, 1.0, 1.0, 0.9 );
 
 // Netnames for copper layers
 for( PCB_LAYER_ID layer : LSET::AllCuMask().CuStack() )
 {
 const COLOR4D lightLabel( 1.0, 1.0, 1.0, 0.7 );
 const COLOR4D darkLabel = lightLabel.Inverted();
 
 if( m_layerColors[layer].GetBrightness() > 0.5 )
 m_layerColors[GetNetnameLayer( layer )] = darkLabel;
 else
 m_layerColors[GetNetnameLayer( layer )] = lightLabel;
 }
 
 if( PgmOrNull() ) // can be null if used without project (i.e. from python script)
 m_hiContrastFactor = 1.0f - Pgm().GetCommonSettings()->m_Appearance.hicontrast_dimming_factor;
 else
 m_hiContrastFactor = 1.0f - 0.8f; // default value
 
 update();
}
 
 
void PCB_RENDER_SETTINGS::LoadDisplayOptions( const PCB_DISPLAY_OPTIONS& aOptions )
{
 m_hiContrastEnabled = aOptions.m_ContrastModeDisplay != HIGH_CONTRAST_MODE::NORMAL;
 m_ZoneDisplayMode = aOptions.m_ZoneDisplayMode;
 m_ContrastModeDisplay = aOptions.m_ContrastModeDisplay;
 m_netColorMode = aOptions.m_NetColorMode;
 
 m_trackOpacity = aOptions.m_TrackOpacity;
 m_viaOpacity = aOptions.m_ViaOpacity;
 m_padOpacity = aOptions.m_PadOpacity;
 m_zoneOpacity = aOptions.m_ZoneOpacity;
 m_imageOpacity = aOptions.m_ImageOpacity;
 m_filledShapeOpacity = aOptions.m_FilledShapeOpacity;
}
 
 
COLOR4D PCB_RENDER_SETTINGS::GetColor( const VIEW_ITEM* aItem, int aLayer ) const
{
 return GetColor( dynamic_cast<const BOARD_ITEM*>( aItem ), aLayer );
}
 
 
COLOR4D PCB_RENDER_SETTINGS::GetColor( const BOARD_ITEM* aItem, int aLayer ) const
{
 int netCode = -1;
 int originalLayer = aLayer;
 
 // Marker shadows
 if( aLayer == LAYER_MARKER_SHADOWS )
 return m_backgroundColor.WithAlpha( 0.6 );
 
 if( IsHoleLayer( aLayer ) && m_isPrinting )
 {
 // Careful that we don't end up with the same colour for the annular ring and the hole
 // when printing in B&W.
 const PAD* pad = dynamic_cast<const PAD*>( aItem );
 const PCB_VIA* via = dynamic_cast<const PCB_VIA*>( aItem );
 int holeLayer = aLayer;
 int annularRingLayer = UNDEFINED_LAYER;
 
 if( pad && pad->GetAttribute() == PAD_ATTRIB::PTH )
 annularRingLayer = LAYER_PADS_TH;
 else if( via && via->GetViaType() == VIATYPE::MICROVIA )
 annularRingLayer = LAYER_VIA_MICROVIA;
 else if( via && via->GetViaType() == VIATYPE::BLIND_BURIED )
 annularRingLayer = LAYER_VIA_BBLIND;
 else if( via && via->GetViaType() == VIATYPE::THROUGH )
 annularRingLayer = LAYER_VIA_THROUGH;
 
 if( annularRingLayer != UNDEFINED_LAYER
 && m_layerColors[ holeLayer ] == m_layerColors[ annularRingLayer ] )
 {
 aLayer = LAYER_PCB_BACKGROUND;
 }
 }
 
 // Zones should pull from the copper layer
 if( aItem && aItem->Type() == PCB_ZONE_T )
 {
 if( IsZoneFillLayer( aLayer ) )
 aLayer = aLayer - LAYER_ZONE_START;
 }
 
 // Hole walls should pull from the copper layer
 if( aLayer == LAYER_PAD_HOLEWALLS )
 aLayer = LAYER_PADS_TH;
 else if( aLayer == LAYER_VIA_HOLEWALLS )
 aLayer = LAYER_VIA_THROUGH;
 
 // Show via mask layers if appropriate
 if( aLayer == LAYER_VIA_THROUGH && !m_isPrinting )
 {
 if( aItem && aItem->GetBoard() )
 {
 LSET visibleLayers = aItem->GetBoard()->GetVisibleLayers()
 & aItem->GetBoard()->GetEnabledLayers()
 & aItem->GetLayerSet();
 
 if( GetActiveLayer() == F_Mask && visibleLayers.test( F_Mask ) )
 aLayer = F_Mask;
 else if( GetActiveLayer() == B_Mask && visibleLayers.test( B_Mask ) )
 aLayer = B_Mask;
 else if( ( visibleLayers & LSET::AllCuMask() ).none() )
 {
 if( visibleLayers.any() )
 aLayer = visibleLayers.Seq().back();
 }
 }
 }
 
 // Normal path: get the layer base color
 COLOR4D color = m_layerColors[aLayer];
 
 if( !aItem )
 return m_layerColors[aLayer];
 
 // Selection disambiguation
 if( aItem->IsBrightened() )
 return color.Brightened( m_selectFactor ).WithAlpha( 0.8 );
 
 // Normal selection
 if( aItem->IsSelected() )
 color = m_layerColorsSel[aLayer];
 
 // Some graphic objects are BOARD_CONNECTED_ITEM, but they are seen here as
 // actually board connected objects only if on a copper layer
 const BOARD_CONNECTED_ITEM* conItem =
 aItem->IsConnected() && aItem->IsOnCopperLayer()
 ? static_cast<const BOARD_CONNECTED_ITEM*>( aItem )
 : nullptr;
 
 // Try to obtain the netcode for the aItem
 if( conItem )
 netCode = conItem->GetNetCode();
 
 bool highlighted = m_highlightEnabled && m_highlightNetcodes.count( netCode );
 bool selected = aItem->IsSelected();
 
 // Apply net color overrides
 if( conItem && m_netColorMode == NET_COLOR_MODE::ALL && IsNetCopperLayer( aLayer ) )
 {
 COLOR4D netColor = COLOR4D::UNSPECIFIED;
 
 auto ii = m_netColors.find( netCode );
 
 if( ii != m_netColors.end() )
 netColor = ii->second;
 
 if( netColor == COLOR4D::UNSPECIFIED )
 {
 auto jj = m_netclassColors.find( conItem->GetNetClassName() );
 
 if( jj != m_netclassColors.end() )
 netColor = jj->second;
 }
 
 if( netColor == COLOR4D::UNSPECIFIED )
 netColor = color;
 
 if( selected )
 {
 // Selection brightening overrides highlighting
 netColor.Brighten( m_selectFactor );
 }
 else if( m_highlightEnabled )
 {
 // Highlight brightens objects on all layers and darkens everything else for contrast
 if( highlighted )
 netColor.Brighten( m_highlightFactor );
 else
 netColor.Darken( 1.0 - m_highlightFactor );
 }
 
 color = netColor;
 }
 else if( !selected && m_highlightEnabled )
 {
 // Single net highlight mode
 color = m_highlightNetcodes.count( netCode ) ? m_layerColorsHi[aLayer]
 : m_layerColorsDark[aLayer];
 }
 
 // Apply high-contrast dimming
 if( m_hiContrastEnabled && m_highContrastLayers.size() && !highlighted && !selected )
 {
 PCB_LAYER_ID primary = GetPrimaryHighContrastLayer();
 bool isActive = m_highContrastLayers.count( aLayer );
 bool hide = false;
 
 switch( originalLayer )
 {
 case LAYER_PADS_SMD_FR:
 case LAYER_PADS_SMD_BK:
 case LAYER_PADS_TH:
 {
 const PAD* pad = static_cast<const PAD*>( aItem );
 
 if( pad->IsOnLayer( primary ) && !pad->FlashLayer( primary ) )
 {
 isActive = false;
 
 if( IsCopperLayer( primary ) )
 hide = true;
 }
 
 if( m_PadEditModePad && pad != m_PadEditModePad )
 isActive = false;
 
 break;
 }
 
 case LAYER_VIA_BBLIND:
 case LAYER_VIA_MICROVIA:
 {
 const PCB_VIA* via = static_cast<const PCB_VIA*>( aItem );
 
 // Target graphic is active if the via crosses the primary layer
 if( via->GetLayerSet().test( primary ) == 0 )
 {
 isActive = false;
 hide = true;
 }
 
 break;
 }
 
 case LAYER_VIA_THROUGH:
 {
 const PCB_VIA* via = static_cast<const PCB_VIA*>( aItem );
 
 if( !via->FlashLayer( primary ) )
 {
 isActive = false;
 
 if( IsCopperLayer( primary ) )
 hide = true;
 }
 
 break;
 }
 
 case LAYER_PAD_PLATEDHOLES:
 case LAYER_PAD_HOLEWALLS:
 case LAYER_NON_PLATEDHOLES:
 // Pad holes are active is any physical layer is active
 if( LSET::PhysicalLayersMask().test( primary ) == 0 )
 isActive = false;
 
 break;
 
 case LAYER_VIA_HOLES:
 case LAYER_VIA_HOLEWALLS:
 {
 const PCB_VIA* via = static_cast<const PCB_VIA*>( aItem );
 
 if( via->GetViaType() == VIATYPE::BLIND_BURIED
 || via->GetViaType() == VIATYPE::MICROVIA )
 {
 // A blind or micro via's hole is active if it crosses the primary layer
 if( via->GetLayerSet().test( primary ) == 0 )
 isActive = false;
 }
 else
 {
 // A through via's hole is active if any physical layer is active
 if( LSET::PhysicalLayersMask().test( primary ) == 0 )
 isActive = false;
 }
 
 break;
 }
 
 case LAYER_DRC_ERROR:
 case LAYER_DRC_WARNING:
 case LAYER_DRC_EXCLUSION:
 isActive = true;
 break;
 
 default:
 break;
 }
 
 if( !isActive )
 {
 if( m_ContrastModeDisplay == HIGH_CONTRAST_MODE::HIDDEN
 || IsNetnameLayer( aLayer )
 || hide )
 {
 color = COLOR4D::CLEAR;
 }
 else
 {
 color = color.Mix( m_layerColors[LAYER_PCB_BACKGROUND], m_hiContrastFactor );
 
 // Reference images can't have their color mixed so just reduce the opacity a bit
 // so they show through less
 if( aItem->Type() == PCB_REFERENCE_IMAGE_T )
 color.a *= m_hiContrastFactor;
 }
 }
 }
 else if( originalLayer == LAYER_VIA_BBLIND || originalLayer == LAYER_VIA_MICROVIA )
 {
 const PCB_VIA* via = static_cast<const PCB_VIA*>( aItem );
 const BOARD* board = via->GetBoard();
 LSET visibleLayers = board->GetVisibleLayers() & board->GetEnabledLayers();
 
 // Target graphic is visible if the via crosses a visible layer
 if( ( via->GetLayerSet() & visibleLayers ).none() )
 color = COLOR4D::CLEAR;
 }
 
 // Apply per-type opacity overrides
 if( aItem->Type() == PCB_TRACE_T || aItem->Type() == PCB_ARC_T )
 color.a *= m_trackOpacity;
 else if( aItem->Type() == PCB_VIA_T )
 color.a *= m_viaOpacity;
 else if( aItem->Type() == PCB_PAD_T )
 color.a *= m_padOpacity;
 else if( aItem->Type() == PCB_ZONE_T && static_cast<const ZONE*>( aItem )->IsTeardropArea() )
 color.a *= m_trackOpacity;
 else if( aItem->Type() == PCB_ZONE_T )
 color.a *= m_zoneOpacity;
 else if( aItem->Type() == PCB_REFERENCE_IMAGE_T )
 color.a *= m_imageOpacity;
 else if( aItem->Type() == PCB_SHAPE_T && static_cast<const PCB_SHAPE*>( aItem )->IsFilled() )
 color.a *= m_filledShapeOpacity;
 else if( aItem->Type() == PCB_SHAPE_T && aItem->IsOnCopperLayer() )
 color.a *= m_trackOpacity;
 
 if( aItem->GetForcedTransparency() > 0.0 )
 color = color.WithAlpha( color.a * ( 1.0 - aItem->GetForcedTransparency() ) );
 
 // No special modifiers enabled
 return color;
}
 
 
bool PCB_RENDER_SETTINGS::GetShowPageLimits() const
{
 return pcbconfig() && pcbconfig()->m_ShowPageLimits;
}
 
 
PCB_PAINTER::PCB_PAINTER( GAL* aGal, FRAME_T aFrameType ) :
 PAINTER( aGal ),
 m_frameType( aFrameType ),
 m_maxError( ARC_HIGH_DEF ),
 m_holePlatingThickness( 0 ),
 m_lockedShadowMargin( 0 )
{
}
 
 
int PCB_PAINTER::getLineThickness( int aActualThickness ) const
{
 // if items have 0 thickness, draw them with the outline
 // width, otherwise respect the set value (which, no matter
 // how small will produce something)
 if( aActualThickness == 0 )
 return m_pcbSettings.m_outlineWidth;
 
 return aActualThickness;
}
 
 
PAD_DRILL_SHAPE PCB_PAINTER::getDrillShape( const PAD* aPad ) const
{
 return aPad->GetDrillShape();
}
 
 
SHAPE_SEGMENT PCB_PAINTER::getPadHoleShape( const PAD* aPad ) const
{
 SHAPE_SEGMENT segm = *aPad->GetEffectiveHoleShape().get();
 return segm;
}
 
 
int PCB_PAINTER::getViaDrillSize( const PCB_VIA* aVia ) const
{
 return aVia->GetDrillValue();
}
 
 
bool PCB_PAINTER::Draw( const VIEW_ITEM* aItem, int aLayer )
{
 const BOARD_ITEM* item = dynamic_cast<const BOARD_ITEM*>( aItem );
 
 if( !item )
 return false;
 
 if( const BOARD* board = item->GetBoard() )
 {
 BOARD_DESIGN_SETTINGS& bds = board->GetDesignSettings();
 m_maxError = bds.m_MaxError;
 m_holePlatingThickness = bds.GetHolePlatingThickness();
 m_lockedShadowMargin = bds.GetLineThickness( F_SilkS ) * 4;
 
 if( item->GetParentFootprint() && !board->IsFootprintHolder() )
 {
 FOOTPRINT* parentFP = item->GetParentFootprint();
 
 // Never draw footprint reference images on board
 if( item->Type() == PCB_REFERENCE_IMAGE_T )
 {
 return false;
 }
 else if( item->GetLayerSet().count() > 1 )
 {
 // For multi-layer objects, exclude only those layers that are private
 if( IsPcbLayer( aLayer ) && parentFP->GetPrivateLayers().test( aLayer ) )
 return false;
 }
 else if( item->GetLayerSet().count() == 1 )
 {
 // For single-layer objects, exclude all layers including ancillary layers
 // such as holes, netnames, etc.
 PCB_LAYER_ID singleLayer = item->GetLayerSet().ExtractLayer();
 
 if( parentFP->GetPrivateLayers().test( singleLayer ) )
 return false;
 }
 }
 }
 else
 {
 m_maxError = ARC_HIGH_DEF;
 m_holePlatingThickness = 0;
 }
 
 // the "cast" applied in here clarifies which overloaded draw() is called
 switch( item->Type() )
 {
 case PCB_TRACE_T:
 draw( static_cast<const PCB_TRACK*>( item ), aLayer );
 break;
 
 case PCB_ARC_T:
 draw( static_cast<const PCB_ARC*>( item ), aLayer );
 break;
 
 case PCB_VIA_T:
 draw( static_cast<const PCB_VIA*>( item ), aLayer );
 break;
 
 case PCB_PAD_T:
 draw( static_cast<const PAD*>( item ), aLayer );
 break;
 
 case PCB_SHAPE_T:
 draw( static_cast<const PCB_SHAPE*>( item ), aLayer );
 break;
 
 case PCB_REFERENCE_IMAGE_T:
 draw( static_cast<const PCB_REFERENCE_IMAGE*>( item ), aLayer );
 break;
 
 case PCB_FIELD_T:
 case PCB_TEXT_T:
 draw( static_cast<const PCB_TEXT*>( item ), aLayer );
 break;
 
 case PCB_TEXTBOX_T:
 draw( static_cast<const PCB_TEXTBOX*>( item ), aLayer );
 break;
 
 case PCB_TABLE_T:
 draw( static_cast<const PCB_TABLE*>( item ), aLayer );
 break;
 
 case PCB_FOOTPRINT_T:
 draw( static_cast<const FOOTPRINT*>( item ), aLayer );
 break;
 
 case PCB_GROUP_T:
 draw( static_cast<const PCB_GROUP*>( item ), aLayer );
 break;
 
 case PCB_ZONE_T:
 draw( static_cast<const ZONE*>( item ), aLayer );
 break;
 
 case PCB_DIM_ALIGNED_T:
 case PCB_DIM_CENTER_T:
 case PCB_DIM_RADIAL_T:
 case PCB_DIM_ORTHOGONAL_T:
 case PCB_DIM_LEADER_T:
 draw( static_cast<const PCB_DIMENSION_BASE*>( item ), aLayer );
 break;
 
 case PCB_TARGET_T:
 draw( static_cast<const PCB_TARGET*>( item ) );
 break;
 
 case PCB_MARKER_T:
 draw( static_cast<const PCB_MARKER*>( item ), aLayer );
 break;
 
 default:
 // Painter does not know how to draw the object
 return false;
 }
 
 // Draw bounding boxes after drawing objects so they can be seen.
 if( m_pcbSettings.GetDrawBoundingBoxes() )
 {
 // Show bounding boxes of painted objects for debugging.
 BOX2I box = item->GetBoundingBox();
 
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 
 if( item->Type() == PCB_FOOTPRINT_T )
 {
 m_gal->SetStrokeColor( item->IsSelected() ? COLOR4D( 1.0, 0.2, 0.2, 1 ) :
 COLOR4D( MAGENTA ) );
 }
 else
 {
 m_gal->SetStrokeColor( item->IsSelected() ? COLOR4D( 1.0, 0.2, 0.2, 1 ) :
 COLOR4D( 0.4, 0.4, 0.4, 1 ) );
 }
 
 m_gal->SetLineWidth( 1 );
 m_gal->DrawRectangle( box.GetOrigin(), box.GetEnd() );
 
 if( item->Type() == PCB_FOOTPRINT_T )
 {
 m_gal->SetStrokeColor( item->IsSelected() ? COLOR4D( 1.0, 0.2, 0.2, 1 ) :
 COLOR4D( CYAN ) );
 
 const FOOTPRINT* fp = static_cast<const FOOTPRINT*>( item );
 
 if( fp )
 {
 const SHAPE_POLY_SET& convex = fp->GetBoundingHull();
 
 m_gal->DrawPolyline( convex.COutline( 0 ) );
 }
 }
 }
 
 return true;
}
 
 
void PCB_PAINTER::draw( const PCB_TRACK* aTrack, int aLayer )
{
 VECTOR2I start( aTrack->GetStart() );
 VECTOR2I end( aTrack->GetEnd() );
 int track_width = aTrack->GetWidth();
 COLOR4D color = m_pcbSettings.GetColor( aTrack, aLayer );
 
 if( IsNetnameLayer( aLayer ) )
 {
 if( !pcbconfig() || pcbconfig()->m_Display.m_NetNames < 2 )
 return;
 
 if( aTrack->GetNetCode() <= NETINFO_LIST::UNCONNECTED )
 return;
 
 SHAPE_SEGMENT trackShape( { aTrack->GetStart(), aTrack->GetEnd() }, aTrack->GetWidth() );
 renderNetNameForSegment( trackShape, color, aTrack->GetDisplayNetname() );
 return;
 }
 else if( IsCopperLayer( aLayer ) || aLayer == LAYER_LOCKED_ITEM_SHADOW )
 {
 // Draw a regular track
 bool outline_mode = pcbconfig()
 && !pcbconfig()->m_Display.m_DisplayPcbTrackFill
 && aLayer != LAYER_LOCKED_ITEM_SHADOW;
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetIsStroke( outline_mode );
 m_gal->SetIsFill( not outline_mode );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW )
 track_width = track_width + m_lockedShadowMargin;
 
 m_gal->DrawSegment( start, end, track_width );
 }
 
 // Clearance lines
 if( pcbconfig() && pcbconfig()->m_Display.m_TrackClearance == SHOW_WITH_VIA_ALWAYS
 && !m_pcbSettings.m_isPrinting
 && aLayer != LAYER_LOCKED_ITEM_SHADOW )
 {
 /*
 * Showing the clearance area is not obvious for optionally-flashed pads and vias, so we
 * choose to not display clearance lines at all on non-copper active layers. We follow
 * the same rule for tracks to be consistent (even though they don't have the same issue).
 */
 PCB_LAYER_ID activeLayer = m_pcbSettings.GetActiveLayer();
 const BOARD* board = aTrack->GetBoard();
 
 if( IsCopperLayer( activeLayer ) && board->GetVisibleLayers().test( activeLayer ) )
 {
 int clearance = aTrack->GetOwnClearance( activeLayer );
 
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 m_gal->DrawSegment( start, end, track_width + clearance * 2 );
 }
 }
}
 
 
void PCB_PAINTER::renderNetNameForSegment( const SHAPE_SEGMENT& aSeg, const COLOR4D& aColor,
 const wxString& aNetName ) const
{
 // When drawing netnames, clip the track to the viewport
 BOX2D viewport;
 VECTOR2D screenSize = m_gal->GetScreenPixelSize();
 const MATRIX3x3D& matrix = m_gal->GetScreenWorldMatrix();
 
 viewport.SetOrigin( VECTOR2D( matrix * VECTOR2D( 0, 0 ) ) );
 viewport.SetEnd( VECTOR2D( matrix * screenSize ) );
 viewport.Normalize();
 
 int num_char = aNetName.size();
 
 // Check if the track is long enough to have a netname displayed
 int seg_minlength = aSeg.GetWidth() * num_char;
 SEG::ecoord seg_minlength_sq = (SEG::ecoord)seg_minlength * seg_minlength;
 
 if( aSeg.GetSeg().SquaredLength() < seg_minlength_sq )
 return;
 
 double textSize = aSeg.GetWidth();
 double penWidth = textSize / 12.0;
 EDA_ANGLE textOrientation;
 int num_names = 1;
 
 VECTOR2I start = aSeg.GetSeg().A;
 VECTOR2I end = aSeg.GetSeg().B;
 VECTOR2D segV = end - start;
 
 if( end.y == start.y ) // horizontal
 {
 textOrientation = ANGLE_HORIZONTAL;
 num_names = std::max( num_names, KiROUND( aSeg.GetSeg().Length() / viewport.GetWidth() ) );
 }
 else if( end.x == start.x ) // vertical
 {
 textOrientation = ANGLE_VERTICAL;
 num_names = std::max( num_names, KiROUND( aSeg.GetSeg().Length() / viewport.GetHeight() ) );
 }
 else
 {
 textOrientation = -EDA_ANGLE( segV );
 textOrientation.Normalize90();
 
 double min_size = std::min( viewport.GetWidth(), viewport.GetHeight() );
 num_names = std::max( num_names, KiROUND( aSeg.GetSeg().Length() / ( M_SQRT2 * min_size ) ) );
 }
 
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 m_gal->SetStrokeColor( aColor );
 m_gal->SetLineWidth( penWidth );
 m_gal->SetFontBold( false );
 m_gal->SetFontItalic( false );
 m_gal->SetFontUnderlined( false );
 m_gal->SetTextMirrored( false );
 m_gal->SetGlyphSize( VECTOR2D( textSize * 0.55, textSize * 0.55 ) );
 m_gal->SetHorizontalJustify( GR_TEXT_H_ALIGN_CENTER );
 m_gal->SetVerticalJustify( GR_TEXT_V_ALIGN_CENTER );
 
 int divisions = num_names + 1;
 
 for( int ii = 1; ii < divisions; ++ii )
 {
 VECTOR2I textPosition = start + segV * ( (double) ii / divisions );
 
 if( viewport.Contains( textPosition ) )
 m_gal->BitmapText( aNetName, textPosition, textOrientation );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_ARC* aArc, int aLayer )
{
 VECTOR2D center( aArc->GetCenter() );
 int width = aArc->GetWidth();
 COLOR4D color = m_pcbSettings.GetColor( aArc, aLayer );
 double radius = aArc->GetRadius();
 EDA_ANGLE start_angle = aArc->GetArcAngleStart();
 EDA_ANGLE angle = aArc->GetAngle();
 
 if( IsNetnameLayer( aLayer ) )
 {
 // Ummm, yeah. Anyone fancy implementing text on a path?
 return;
 }
 else if( IsCopperLayer( aLayer ) || aLayer == LAYER_LOCKED_ITEM_SHADOW )
 {
 // Draw a regular track
 bool outline_mode = pcbconfig()
 && !pcbconfig()->m_Display.m_DisplayPcbTrackFill
 && aLayer != LAYER_LOCKED_ITEM_SHADOW;
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetIsStroke( outline_mode );
 m_gal->SetIsFill( not outline_mode );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW )
 width = width + m_lockedShadowMargin;
 
 m_gal->DrawArcSegment( center, radius, start_angle, angle, width, m_maxError );
 }
 
 // Clearance lines
 if( pcbconfig() && pcbconfig()->m_Display.m_TrackClearance == SHOW_WITH_VIA_ALWAYS
 && !m_pcbSettings.m_isPrinting
 && aLayer != LAYER_LOCKED_ITEM_SHADOW )
 {
 /*
 * Showing the clearance area is not obvious for optionally-flashed pads and vias, so we
 * choose to not display clearance lines at all on non-copper active layers. We follow
 * the same rule for tracks to be consistent (even though they don't have the same issue).
 */
 PCB_LAYER_ID activeLayer = m_pcbSettings.GetActiveLayer();
 const BOARD* board = aArc->GetBoard();
 
 if( IsCopperLayer( activeLayer ) && board->GetVisibleLayers().test( activeLayer ) )
 {
 int clearance = aArc->GetOwnClearance( activeLayer );
 
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 
 m_gal->DrawArcSegment( center, radius, start_angle, angle, width + clearance * 2,
 m_maxError );
 }
 }
 
// Debug only: enable this code only to test the TransformArcToPolygon function
// and display the polygon outline created by it.
// arcs on F_Cu are approximated with ERROR_INSIDE, others with ERROR_OUTSIDE
#if 0
 SHAPE_POLY_SET cornerBuffer;
 ERROR_LOC errorloc = aLayer == F_Cu ? ERROR_LOC::ERROR_INSIDE : ERROR_LOC::ERROR_OUTSIDE;
 TransformArcToPolygon( cornerBuffer, aArc->GetStart(), aArc->GetMid(), aArc->GetEnd(), width,
 m_maxError, errorloc );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( COLOR4D( 0, 0, 1.0, 1.0 ) );
 m_gal->DrawPolygon( cornerBuffer );
#endif
 
// Debug only: enable this code only to test the SHAPE_ARC::ConvertToPolyline function
// and display the polyline created by it.
#if 0
 SHAPE_ARC arc( aArc->GetCenter(), aArc->GetStart(), aArc->GetAngle(), aArc->GetWidth() );
 SHAPE_LINE_CHAIN arcSpine = arc.ConvertToPolyline( m_maxError );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( COLOR4D( 0.3, 0.2, 0.5, 1.0 ) );
 
 for( int idx = 1; idx < arcSpine.PointCount(); idx++ )
 m_gal->DrawSegment( arcSpine.CPoint( idx-1 ), arcSpine.CPoint( idx ), aArc->GetWidth() );
#endif
}
 
 
void PCB_PAINTER::draw( const PCB_VIA* aVia, int aLayer )
{
 const BOARD* board = aVia->GetBoard();
 COLOR4D color = m_pcbSettings.GetColor( aVia, aLayer );
 VECTOR2D center( aVia->GetStart() );
 
 if( color == COLOR4D::CLEAR )
 return;
 
 // Draw description layer
 if( IsNetnameLayer( aLayer ) )
 {
 VECTOR2D position( center );
 
 // Is anything that we can display enabled (netname and/or layers ids)?
 bool showNets = pcbconfig() && pcbconfig()->m_Display.m_NetNames != 0
 && !aVia->GetNetname().empty();
 bool showLayers = aVia->GetViaType() != VIATYPE::THROUGH;
 
 if( !showNets && !showLayers )
 return;
 
 double maxSize = PCB_RENDER_SETTINGS::MAX_FONT_SIZE;
 double size = aVia->GetWidth();
 
 // Font size limits
 if( size > maxSize )
 size = maxSize;
 
 m_gal->Save();
 m_gal->Translate( position );
 
 // Default font settings
 m_gal->ResetTextAttributes();
 m_gal->SetHorizontalJustify( GR_TEXT_H_ALIGN_CENTER );
 m_gal->SetVerticalJustify( GR_TEXT_V_ALIGN_CENTER );
 m_gal->SetFontBold( false );
 m_gal->SetFontItalic( false );
 m_gal->SetFontUnderlined( false );
 m_gal->SetTextMirrored( false );
 m_gal->SetStrokeColor( m_pcbSettings.GetColor( nullptr, aLayer ) );
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 
 // Set the text position via position. if only one text, it is on the via position
 // For 2 lines, the netname is slightly below the center, and the layer IDs above
 // the netname
 VECTOR2D textpos( 0.0, 0.0 );
 
 wxString netname = aVia->GetDisplayNetname();
 
 int topLayer = aVia->TopLayer() + 1;
 int bottomLayer = std::min( aVia->BottomLayer() + 1, board->GetCopperLayerCount() );
 
 wxString layerIds;
#if wxUSE_UNICODE_WCHAR
 layerIds << std::to_wstring( topLayer ) << L'-' << std::to_wstring( bottomLayer );
#else
 layerIds << std::to_string( topLayer ) << '-' << std::to_string( bottomLayer );
#endif
 
 // a good size is set room for at least 6 chars, to be able to print 2 lines of text,
 // or at least 3 chars for only the netname
 // (The layerIds string has 5 chars max)
 int minCharCnt = showLayers ? 6 : 3;
 
 // approximate the size of netname and layerIds text:
 double tsize = 1.5 * size / std::max( PrintableCharCount( netname ), minCharCnt );
 tsize = std::min( tsize, size );
 
 // Use a smaller text size to handle interline, pen size..
 tsize *= 0.75;
 VECTOR2D namesize( tsize, tsize );
 
 // For 2 lines, adjust the text pos (move it a small amount to the bottom)
 if( showLayers )
 textpos.y += tsize/5;
 
 m_gal->SetGlyphSize( namesize );
 m_gal->SetLineWidth( namesize.x / 10.0 );
 
 if( showNets )
 m_gal->BitmapText( netname, textpos, ANGLE_HORIZONTAL );
 
 if( showLayers )
 {
 if( showNets )
 textpos.y -= tsize * 1.3;
 
 m_gal->BitmapText( layerIds, textpos, ANGLE_HORIZONTAL );
 }
 
 m_gal->Restore();
 
 return;
 }
 
 bool outline_mode = pcbconfig() && !pcbconfig()->m_Display.m_DisplayViaFill;
 
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 
 if( outline_mode )
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 
 if( aLayer == LAYER_VIA_HOLEWALLS )
 {
 double radius = ( getViaDrillSize( aVia ) / 2.0 ) + m_holePlatingThickness;
 
 if( !outline_mode )
 {
 m_gal->SetLineWidth( m_holePlatingThickness );
 radius -= m_holePlatingThickness / 2.0;
 }
 
 m_gal->DrawCircle( center, radius );
 }
 else if( aLayer == LAYER_VIA_HOLES )
 {
 m_gal->SetIsStroke( false );
 m_gal->SetIsFill( true );
 m_gal->DrawCircle( center, getViaDrillSize( aVia ) / 2.0 );
 }
 else if( ( aLayer == F_Mask && aVia->IsOnLayer( F_Mask ) )
 || ( aLayer == B_Mask && aVia->IsOnLayer( B_Mask ) ) )
 {
 int margin = board->GetDesignSettings().m_SolderMaskExpansion;
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 m_gal->SetLineWidth( margin );
 m_gal->DrawCircle( center, aVia->GetWidth() / 2.0 + margin );
 }
 else if( aLayer == LAYER_VIA_THROUGH || m_pcbSettings.IsPrinting() )
 {
 int annular_width = ( aVia->GetWidth() - getViaDrillSize( aVia ) ) / 2.0;
 double radius = aVia->GetWidth() / 2.0;
 bool draw = false;
 
 if( m_pcbSettings.IsPrinting() )
 {
 draw = aVia->FlashLayer( m_pcbSettings.GetPrintLayers() );
 }
 else if( aVia->FlashLayer( board->GetVisibleLayers() & board->GetEnabledLayers() ) )
 {
 draw = true;
 }
 else if( aVia->IsSelected() )
 {
 draw = true;
 outline_mode = true;
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 }
 
 if( !outline_mode )
 {
 m_gal->SetLineWidth( annular_width );
 radius -= annular_width / 2.0;
 }
 
 if( draw )
 m_gal->DrawCircle( center, radius );
 }
 else if( aLayer == LAYER_VIA_BBLIND || aLayer == LAYER_VIA_MICROVIA )
 {
 int annular_width = ( aVia->GetWidth() - getViaDrillSize( aVia ) ) / 2.0;
 double radius = aVia->GetWidth() / 2.0;
 
 // Outer circles of blind/buried and micro-vias are drawn in a special way to indicate the
 // top and bottom layers
 PCB_LAYER_ID layerTop, layerBottom;
 aVia->LayerPair( &layerTop, &layerBottom );
 
 if( !outline_mode )
 {
 m_gal->SetIsStroke( false );
 m_gal->SetIsFill( true );
 }
 
 m_gal->SetStrokeColor( m_pcbSettings.GetColor( aVia, layerTop ) );
 m_gal->SetFillColor( m_pcbSettings.GetColor( aVia, layerTop ) );
 m_gal->DrawArc( center, radius, EDA_ANGLE( 240, DEGREES_T ), EDA_ANGLE( 60, DEGREES_T ) );
 
 m_gal->SetStrokeColor( m_pcbSettings.GetColor( aVia, layerBottom ) );
 m_gal->SetFillColor( m_pcbSettings.GetColor( aVia, layerBottom ) );
 m_gal->DrawArc( center, radius, EDA_ANGLE( 60, DEGREES_T ), EDA_ANGLE( 60, DEGREES_T ) );
 
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 
 if( !outline_mode )
 {
 m_gal->SetLineWidth( annular_width );
 radius -= annular_width / 2.0;
 }
 
 m_gal->DrawCircle( center, radius );
 }
 else if( aLayer == LAYER_LOCKED_ITEM_SHADOW ) // draw a ring around the via
 {
 m_gal->SetLineWidth( m_lockedShadowMargin );
 
 m_gal->DrawCircle( center, ( aVia->GetWidth() + m_lockedShadowMargin ) / 2.0 );
 }
 
 // Clearance lines
 if( pcbconfig() && pcbconfig()->m_Display.m_TrackClearance == SHOW_WITH_VIA_ALWAYS
 && aLayer != LAYER_VIA_HOLES
 && !m_pcbSettings.m_isPrinting
 && aLayer != LAYER_LOCKED_ITEM_SHADOW )
 {
 /*
 * Showing the clearance area is not obvious as the clearance extends from the via's pad
 * on flashed copper layers and from the via's hole on non-flashed copper layers. Because
 * of this, we choose to not display clearance lines at all on non-copper active layers as
 * it's not clear which we'd be displaying.
 */
 PCB_LAYER_ID activeLayer = m_pcbSettings.GetActiveLayer();
 
 if( IsCopperLayer( activeLayer ) && board->GetVisibleLayers().test( activeLayer ) )
 {
 double radius;
 
 if( aVia->FlashLayer( activeLayer ) )
 radius = aVia->GetWidth() / 2.0;
 else
 radius = getViaDrillSize( aVia ) / 2.0 + m_holePlatingThickness;
 
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 m_gal->DrawCircle( center, radius + aVia->GetOwnClearance( activeLayer ) );
 }
 }
}
 
 
void PCB_PAINTER::draw( const PAD* aPad, int aLayer )
{
 const BOARD* board = aPad->GetBoard();
 COLOR4D color = m_pcbSettings.GetColor( aPad, aLayer );
 
 if( IsNetnameLayer( aLayer ) )
 {
 PCBNEW_SETTINGS::DISPLAY_OPTIONS* displayOpts = pcbconfig() ? &pcbconfig()->m_Display : nullptr;
 wxString netname;
 wxString padNumber;
 
 if( viewer_settings()->m_ViewersDisplay.m_DisplayPadNumbers )
 {
 padNumber = UnescapeString( aPad->GetNumber() );
 
 if( dynamic_cast<CVPCB_SETTINGS*>( viewer_settings() ) )
 netname = aPad->GetPinFunction();
 }
 
 if( displayOpts && !dynamic_cast<CVPCB_SETTINGS*>( viewer_settings() ) )
 {
 if( displayOpts->m_NetNames == 1 || displayOpts->m_NetNames == 3 )
 netname = aPad->GetDisplayNetname();
 
 if( aPad->IsNoConnectPad() )
 netname = wxT( "x" );
 else if( aPad->IsFreePad() )
 netname = wxT( "*" );
 }
 
 if( netname.IsEmpty() && padNumber.IsEmpty() )
 return;
 
 BOX2I padBBox = aPad->GetBoundingBox();
 VECTOR2D position = padBBox.Centre();
 VECTOR2D padsize = VECTOR2D( padBBox.GetSize() );
 
 if( aPad->IsEntered() )
 {
 FOOTPRINT* fp = aPad->GetParentFootprint();
 
 // Find the number box
 for( const BOARD_ITEM* aItem : fp->GraphicalItems() )
 {
 if( aItem->Type() == PCB_SHAPE_T )
 {
 const PCB_SHAPE* shape = static_cast<const PCB_SHAPE*>( aItem );
 
 if( shape->IsProxyItem() && shape->GetShape() == SHAPE_T::RECTANGLE )
 {
 position = shape->GetCenter();
 padsize = shape->GetBotRight() - shape->GetTopLeft();
 
 // We normally draw a bit outside the pad, but this will be somewhat
 // unexpected when the user has drawn a box.
 padsize *= 0.9;
 
 break;
 }
 }
 }
 }
 else if( aPad->GetShape() == PAD_SHAPE::CUSTOM )
 {
 // See if we have a number box
 for( const std::shared_ptr<PCB_SHAPE>& primitive : aPad->GetPrimitives() )
 {
 if( primitive->IsProxyItem() && primitive->GetShape() == SHAPE_T::RECTANGLE )
 {
 position = primitive->GetCenter();
 RotatePoint( position, aPad->GetOrientation() );
 position += aPad->ShapePos();
 
 padsize.x = abs( primitive->GetBotRight().x - primitive->GetTopLeft().x );
 padsize.y = abs( primitive->GetBotRight().y - primitive->GetTopLeft().y );
 
 // We normally draw a bit outside the pad, but this will be somewhat
 // unexpected when the user has drawn a box.
 padsize *= 0.9;
 
 break;
 }
 }
 }
 
 if( aPad->GetShape() != PAD_SHAPE::CUSTOM )
 {
 // Don't allow a 45° rotation to bloat a pad's bounding box unnecessarily
 double limit = std::min( aPad->GetSize().x, aPad->GetSize().y ) * 1.1;
 
 if( padsize.x > limit && padsize.y > limit )
 {
 padsize.x = limit;
 padsize.y = limit;
 }
 }
 
 double maxSize = PCB_RENDER_SETTINGS::MAX_FONT_SIZE;
 double size = padsize.y;
 
 m_gal->Save();
 m_gal->Translate( position );
 
 // Keep the size ratio for the font, but make it smaller
 if( padsize.x < ( padsize.y * 0.95 ) )
 {
 m_gal->Rotate( -ANGLE_90.AsRadians() );
 size = padsize.x;
 std::swap( padsize.x, padsize.y );
 }
 
 // Font size limits
 if( size > maxSize )
 size = maxSize;
 
 // Default font settings
 m_gal->ResetTextAttributes();
 m_gal->SetHorizontalJustify( GR_TEXT_H_ALIGN_CENTER );
 m_gal->SetVerticalJustify( GR_TEXT_V_ALIGN_CENTER );
 m_gal->SetFontBold( false );
 m_gal->SetFontItalic( false );
 m_gal->SetFontUnderlined( false );
 m_gal->SetTextMirrored( false );
 m_gal->SetStrokeColor( m_pcbSettings.GetColor( aPad, aLayer ) );
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 
 // We have already translated the GAL to be centered at the center of the pad's
 // bounding box
 VECTOR2I textpos( 0, 0 );
 
 // Divide the space, to display both pad numbers and netnames and set the Y text
 // offset position to display 2 lines
 int Y_offset_numpad = 0;
 int Y_offset_netname = 0;
 
 if( !netname.IsEmpty() && !padNumber.IsEmpty() )
 {
 // The magic numbers are defined experimentally for a better look.
 size = size / 2.5;
 Y_offset_netname = size / 1.4; // netname size is usually smaller than num pad
 // so the offset can be smaller
 Y_offset_numpad = size / 1.7;
 }
 
 // We are using different fonts to display names, depending on the graphic
 // engine (OpenGL or Cairo).
 // Xscale_for_stroked_font adjust the text X size for cairo (stroke fonts) engine
 const double Xscale_for_stroked_font = 0.9;
 
 if( !netname.IsEmpty() )
 {
 // approximate the size of net name text:
 // We use a size for at least 5 chars, to give a good look even for short names
 // (like VCC, GND...)
 double tsize = 1.5 * padsize.x / std::max( PrintableCharCount( netname )+1, 5 );
 tsize = std::min( tsize, size );
 
 // Use a smaller text size to handle interline, pen size...
 tsize *= 0.85;
 
 // Round and oval pads have less room to display the net name than other
 // (i.e RECT) shapes, so reduce the text size for these shapes
 if( aPad->GetShape() == PAD_SHAPE::CIRCLE || aPad->GetShape() == PAD_SHAPE::OVAL )
 tsize *= 0.9;
 
 VECTOR2D namesize( tsize*Xscale_for_stroked_font, tsize );
 textpos.y = std::min( tsize * 1.4, double( Y_offset_netname ) );
 
 m_gal->SetGlyphSize( namesize );
 m_gal->SetLineWidth( namesize.x / 6.0 );
 m_gal->SetFontBold( true );
 m_gal->BitmapText( netname, textpos, ANGLE_HORIZONTAL );
 }
 
 if( !padNumber.IsEmpty() )
 {
 // approximate the size of the pad number text:
 // We use a size for at least 3 chars, to give a good look even for short numbers
 double tsize = 1.5 * padsize.x / std::max( PrintableCharCount( padNumber ), 3 );
 tsize = std::min( tsize, size );
 
 // Use a smaller text size to handle interline, pen size...
 tsize *= 0.85;
 tsize = std::min( tsize, size );
 VECTOR2D numsize( tsize*Xscale_for_stroked_font, tsize );
 textpos.y = -Y_offset_numpad;
 
 m_gal->SetGlyphSize( numsize );
 m_gal->SetLineWidth( numsize.x / 6.0 );
 m_gal->SetFontBold( true );
 m_gal->BitmapText( padNumber, textpos, ANGLE_HORIZONTAL );
 }
 
 m_gal->Restore();
 
 return;
 }
 else if( aLayer == LAYER_PAD_HOLEWALLS )
 {
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( m_holePlatingThickness );
 m_gal->SetStrokeColor( color );
 
 std::shared_ptr<SHAPE_SEGMENT> slot = aPad->GetEffectiveHoleShape();
 int holeSize = slot->GetWidth() + m_holePlatingThickness;
 
 if( slot->GetSeg().A == slot->GetSeg().B ) // Circular hole
 m_gal->DrawCircle( slot->GetSeg().A, KiROUND( holeSize / 2.0 ) );
 else
 m_gal->DrawSegment( slot->GetSeg().A, slot->GetSeg().B, holeSize );
 
 return;
 }
 
 bool outline_mode = !viewer_settings()->m_ViewersDisplay.m_DisplayPadFill;
 
 if( m_pcbSettings.m_ForcePadSketchModeOn )
 outline_mode = true;
 
 if( outline_mode )
 {
 // Outline mode
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetStrokeColor( color );
 }
 else
 {
 // Filled mode
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->SetFillColor( color );
 }
 
 bool drawShape = false;
 
 if( aLayer == LAYER_PAD_PLATEDHOLES || aLayer == LAYER_NON_PLATEDHOLES )
 {
 SHAPE_SEGMENT slot = getPadHoleShape( aPad );
 
 if( slot.GetSeg().A == slot.GetSeg().B ) // Circular hole
 m_gal->DrawCircle( slot.GetSeg().A, slot.GetWidth() / 2.0 );
 else
 m_gal->DrawSegment( slot.GetSeg().A, slot.GetSeg().B, slot.GetWidth() );
 }
 else if( m_pcbSettings.IsPrinting() )
 {
 drawShape = aPad->FlashLayer( m_pcbSettings.GetPrintLayers() );
 }
 else if( aPad->FlashLayer( board->GetVisibleLayers() & board->GetEnabledLayers() ) )
 {
 drawShape = true;
 }
 else if( aPad->IsSelected() )
 {
 drawShape = true;
 outline_mode = true;
 }
 
 if( outline_mode )
 {
 // Outline mode
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetStrokeColor( color );
 }
 
 if( drawShape )
 {
 VECTOR2I pad_size = aPad->GetSize();
 VECTOR2I margin;
 
 switch( aLayer )
 {
 case F_Mask:
 case B_Mask:
 margin.x = margin.y = aPad->GetSolderMaskExpansion();
 break;
 
 case F_Paste:
 case B_Paste:
 margin = aPad->GetSolderPasteMargin();
 break;
 
 default:
 margin.x = margin.y = 0;
 break;
 }
 
 std::unique_ptr<PAD> dummyPad;
 std::shared_ptr<SHAPE_COMPOUND> shapes;
 
 // Drawing components of compound shapes in outline mode produces a mess.
 bool simpleShapes = !outline_mode;
 
 if( simpleShapes )
 {
 if( ( margin.x != margin.y && aPad->GetShape() != PAD_SHAPE::CUSTOM )
 || ( aPad->GetShape() == PAD_SHAPE::ROUNDRECT && ( margin.x < 0 || margin.y < 0 ) ) )
 {
 // Our algorithms below (polygon inflation in particular) can't handle differential
 // inflation along separate axes. So for those cases we build a dummy pad instead,
 // and inflate it.
 
 // Margin is added to both sides. If the total margin is larger than the pad
 // then don't display this layer
 if( pad_size.x + 2 * margin.x <= 0 || pad_size.y + 2 * margin.y <= 0 )
 return;
 
 dummyPad.reset( static_cast<PAD*>( aPad->Duplicate() ) );
 
 if( dummyPad->GetParentGroup() )
 dummyPad->GetParentGroup()->RemoveItem( dummyPad.get() );
 
 int initial_radius = dummyPad->GetRoundRectCornerRadius();
 
 dummyPad->SetSize( pad_size + margin + margin );
 
 if( dummyPad->GetShape() == PAD_SHAPE::ROUNDRECT )
 {
 // To keep the right margin around the corners, we need to modify the corner radius.
 // We must have only one radius correction, so use the smallest absolute margin.
 int radius_margin = std::max( margin.x, margin.y ); // radius_margin is < 0
 dummyPad->SetRoundRectCornerRadius( std::max( initial_radius + radius_margin, 0 ) );
 }
 
 shapes = std::dynamic_pointer_cast<SHAPE_COMPOUND>( dummyPad->GetEffectiveShape() );
 margin.x = margin.y = 0;
 }
 else
 {
 shapes = std::dynamic_pointer_cast<SHAPE_COMPOUND>( aPad->GetEffectiveShape() );
 }
 
 if( aPad->GetShape() == PAD_SHAPE::CUSTOM && ( margin.x || margin.y ) )
 {
 // We can't draw as shapes because we don't know which edges are internal and which
 // are external (so we don't know when to apply the margin and when not to).
 simpleShapes = false;
 }
 
 for( const SHAPE* shape : shapes->Shapes() )
 {
 if( !simpleShapes )
 break;
 
 switch( shape->Type() )
 {
 case SH_SEGMENT:
 case SH_CIRCLE:
 case SH_RECT:
 case SH_SIMPLE:
 // OK so far
 break;
 
 default:
 // Not OK
 simpleShapes = false;
 break;
 }
 }
 }
 
 if( simpleShapes )
 {
 for( const SHAPE* shape : shapes->Shapes() )
 {
 switch( shape->Type() )
 {
 case SH_SEGMENT:
 {
 const SHAPE_SEGMENT* seg = (const SHAPE_SEGMENT*) shape;
 int effectiveWidth = seg->GetWidth() + 2 * margin.x;
 
 if( effectiveWidth > 0 )
 m_gal->DrawSegment( seg->GetSeg().A, seg->GetSeg().B, effectiveWidth );
 
 break;
 }
 
 case SH_CIRCLE:
 {
 const SHAPE_CIRCLE* circle = (const SHAPE_CIRCLE*) shape;
 int effectiveRadius = circle->GetRadius() + margin.x;
 
 if( effectiveRadius > 0 )
 m_gal->DrawCircle( circle->GetCenter(), effectiveRadius );
 
 break;
 }
 
 case SH_RECT:
 {
 const SHAPE_RECT* r = (const SHAPE_RECT*) shape;
 VECTOR2I pos = r->GetPosition();
 VECTOR2I effectiveMargin = margin;
 
 if( effectiveMargin.x < 0 )
 {
 // A negative margin just produces a smaller rect.
 VECTOR2I effectiveSize = r->GetSize() + effectiveMargin;
 
 if( effectiveSize.x > 0 && effectiveSize.y > 0 )
 m_gal->DrawRectangle( pos - effectiveMargin, pos + effectiveSize );
 }
 else if( effectiveMargin.x > 0 )
 {
 // A positive margin produces a larger rect, but with rounded corners
 m_gal->DrawRectangle( r->GetPosition(), r->GetPosition() + r->GetSize() );
 
 // Use segments to produce the margin with rounded corners
 m_gal->DrawSegment( pos,
 pos + VECTOR2I( r->GetWidth(), 0 ),
 effectiveMargin.x * 2 );
 m_gal->DrawSegment( pos + VECTOR2I( r->GetWidth(), 0 ),
 pos + r->GetSize(),
 effectiveMargin.x * 2 );
 m_gal->DrawSegment( pos + r->GetSize(),
 pos + VECTOR2I( 0, r->GetHeight() ),
 effectiveMargin.x * 2 );
 m_gal->DrawSegment( pos + VECTOR2I( 0, r->GetHeight() ),
 pos,
 effectiveMargin.x * 2 );
 }
 else
 {
 m_gal->DrawRectangle( r->GetPosition(), r->GetPosition() + r->GetSize() );
 }
 
 break;
 }
 
 case SH_SIMPLE:
 {
 const SHAPE_SIMPLE* poly = static_cast<const SHAPE_SIMPLE*>( shape );
 
 if( poly->PointCount() < 2 ) // Careful of empty pads
 break;
 
 if( margin.x < 0 ) // The poly shape must be deflated
 {
 SHAPE_POLY_SET outline;
 outline.NewOutline();
 
 for( int ii = 0; ii < poly->PointCount(); ++ii )
 outline.Append( poly->CPoint( ii ) );
 
 outline.Deflate( -margin.x, CORNER_STRATEGY::CHAMFER_ALL_CORNERS,
 m_maxError );
 
 m_gal->DrawPolygon( outline );
 }
 else
 {
 m_gal->DrawPolygon( poly->Vertices() );
 }
 
 // Now add on a rounded margin (using segments) if the margin > 0
 if( margin.x > 0 )
 {
 for( size_t ii = 0; ii < poly->GetSegmentCount(); ++ii )
 {
 SEG seg = poly->GetSegment( ii );
 m_gal->DrawSegment( seg.A, seg.B, margin.x * 2 );
 }
 }
 
 break;
 }
 
 default:
 // Better not get here; we already pre-flighted the shapes...
 break;
 }
 }
 }
 else
 {
 // This is expensive. Avoid if possible.
 SHAPE_POLY_SET polySet;
 aPad->TransformShapeToPolygon( polySet, ToLAYER_ID( aLayer ), margin.x, m_maxError,
 ERROR_INSIDE );
 m_gal->DrawPolygon( polySet );
 }
 }
 
 if( pcbconfig() && pcbconfig()->m_Display.m_PadClearance
 && ( aLayer == LAYER_PADS_SMD_FR || aLayer == LAYER_PADS_SMD_BK || aLayer == LAYER_PADS_TH )
 && !m_pcbSettings.m_isPrinting )
 {
 /*
 * Showing the clearance area is not obvious as the clearance extends from the pad on
 * flashed copper layers and from the hole on non-flashed copper layers. Because of this,
 * we choose to not display clearance lines at all on non-copper active layers as it's
 * not clear which we'd be displaying.
 */
 PCB_LAYER_ID activeLayer = m_pcbSettings.GetActiveLayer();
 
 if( IsCopperLayer( activeLayer ) && board->GetVisibleLayers().test( activeLayer ) )
 {
 if( aPad->GetAttribute() == PAD_ATTRIB::NPTH )
 color = m_pcbSettings.GetLayerColor( LAYER_NON_PLATEDHOLES );
 
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetIsStroke( true );
 m_gal->SetIsFill( false );
 m_gal->SetStrokeColor( color );
 
 int clearance = aPad->GetOwnClearance( activeLayer );
 
 if( aPad->FlashLayer( activeLayer ) && clearance > 0 )
 {
 auto shape = std::dynamic_pointer_cast<SHAPE_COMPOUND>( aPad->GetEffectiveShape() );
 
 if( shape && shape->Size() == 1 && shape->Shapes()[0]->Type() == SH_SEGMENT )
 {
 const SHAPE_SEGMENT* seg = (SHAPE_SEGMENT*) shape->Shapes()[0];
 m_gal->DrawSegment( seg->GetSeg().A, seg->GetSeg().B,
 seg->GetWidth() + 2 * clearance );
 }
 else if( shape && shape->Size() == 1 && shape->Shapes()[0]->Type() == SH_CIRCLE )
 {
 const SHAPE_CIRCLE* circle = (SHAPE_CIRCLE*) shape->Shapes()[0];
 m_gal->DrawCircle( circle->GetCenter(), circle->GetRadius() + clearance );
 }
 else
 {
 SHAPE_POLY_SET polySet;
 
 // Use ERROR_INSIDE because it avoids Clipper and is therefore much faster.
 aPad->TransformShapeToPolygon( polySet, activeLayer, clearance, m_maxError,
 ERROR_INSIDE );
 
 if( polySet.Outline( 0 ).PointCount() > 2 ) // Careful of empty pads
 m_gal->DrawPolygon( polySet );
 }
 }
 else if( aPad->GetEffectiveHoleShape() && clearance > 0 )
 {
 std::shared_ptr<SHAPE_SEGMENT> slot = aPad->GetEffectiveHoleShape();
 m_gal->DrawSegment( slot->GetSeg().A, slot->GetSeg().B,
 slot->GetWidth() + 2 * clearance );
 }
 }
 }
}
 
 
void PCB_PAINTER::draw( const PCB_SHAPE* aShape, int aLayer )
{
 COLOR4D color = m_pcbSettings.GetColor( aShape, aLayer );
 bool outline_mode = !viewer_settings()->m_ViewersDisplay.m_DisplayGraphicsFill;
 int thickness = getLineThickness( aShape->GetWidth() );
 LINE_STYLE lineStyle = aShape->GetStroke().GetLineStyle();
 
 if( IsNetnameLayer( aLayer ) )
 {
 // Net names are shown only in board editor:
 if( m_frameType != FRAME_T::FRAME_PCB_EDITOR )
 return;
 
 if( !pcbconfig() || pcbconfig()->m_Display.m_NetNames < 2 )
 return;
 
 if( aShape->GetNetCode() <= NETINFO_LIST::UNCONNECTED )
 return;
 
 wxString netname = aShape->GetDisplayNetname();
 
 if( netname.IsEmpty() )
 return;
 
 if( aShape->GetShape() == SHAPE_T::SEGMENT )
 {
 SHAPE_SEGMENT seg( { aShape->GetStart(), aShape->GetEnd() }, aShape->GetWidth() );
 renderNetNameForSegment( seg, color, netname );
 return;
 }
 
 // TODO: Maybe use some of the pad code?
 
 return;
 }
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW )
 {
 color = m_pcbSettings.GetColor( aShape, aLayer );
 thickness = thickness + m_lockedShadowMargin;
 }
 
 if( outline_mode )
 {
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 }
 
 m_gal->SetFillColor( color );
 m_gal->SetStrokeColor( color );
 
 // Note: on LAYER_LOCKED_ITEM_SHADOW always draw shadow shapes as continuous lines
 // otherwise the look is very strange and ugly
 if( lineStyle <= LINE_STYLE::FIRST_TYPE || aLayer == LAYER_LOCKED_ITEM_SHADOW )
 {
 switch( aShape->GetShape() )
 {
 case SHAPE_T::SEGMENT:
 if( aShape->IsProxyItem() )
 {
 std::vector<VECTOR2I> pts;
 VECTOR2I offset = ( aShape->GetEnd() - aShape->GetStart() ).Perpendicular();
 offset = offset.Resize( thickness / 2 );
 
 pts.push_back( aShape->GetStart() + offset );
 pts.push_back( aShape->GetStart() - offset );
 pts.push_back( aShape->GetEnd() - offset );
 pts.push_back( aShape->GetEnd() + offset );
 
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->DrawLine( pts[0], pts[1] );
 m_gal->DrawLine( pts[1], pts[2] );
 m_gal->DrawLine( pts[2], pts[3] );
 m_gal->DrawLine( pts[3], pts[0] );
 m_gal->DrawLine( ( pts[0] + pts[1] ) / 2, ( pts[1] + pts[2] ) / 2 );
 m_gal->DrawLine( ( pts[1] + pts[2] ) / 2, ( pts[2] + pts[3] ) / 2 );
 m_gal->DrawLine( ( pts[2] + pts[3] ) / 2, ( pts[3] + pts[0] ) / 2 );
 m_gal->DrawLine( ( pts[3] + pts[0] ) / 2, ( pts[0] + pts[1] ) / 2 );
 }
 else if( outline_mode )
 {
 m_gal->DrawSegment( aShape->GetStart(), aShape->GetEnd(), thickness );
 }
 else
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 m_gal->DrawSegment( aShape->GetStart(), aShape->GetEnd(), thickness );
 }
 
 break;
 
 case SHAPE_T::RECTANGLE:
 {
 std::vector<VECTOR2I> pts = aShape->GetRectCorners();
 
 if( aShape->IsProxyItem() )
 {
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->DrawLine( pts[0], pts[1] );
 m_gal->DrawLine( pts[1], pts[2] );
 m_gal->DrawLine( pts[2], pts[3] );
 m_gal->DrawLine( pts[3], pts[0] );
 m_gal->DrawLine( pts[0], pts[2] );
 m_gal->DrawLine( pts[1], pts[3] );
 }
 else if( outline_mode )
 {
 m_gal->DrawSegment( pts[0], pts[1], thickness );
 m_gal->DrawSegment( pts[1], pts[2], thickness );
 m_gal->DrawSegment( pts[2], pts[3], thickness );
 m_gal->DrawSegment( pts[3], pts[0], thickness );
 }
 else
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 if( thickness > 0 )
 {
 m_gal->DrawSegment( pts[0], pts[1], thickness );
 m_gal->DrawSegment( pts[1], pts[2], thickness );
 m_gal->DrawSegment( pts[2], pts[3], thickness );
 m_gal->DrawSegment( pts[3], pts[0], thickness );
 }
 
 if( aShape->IsFilled() )
 {
 SHAPE_POLY_SET poly;
 poly.NewOutline();
 
 for( const VECTOR2I& pt : pts )
 poly.Append( pt );
 
 m_gal->DrawPolygon( poly );
 }
 }
 
 break;
 }
 
 case SHAPE_T::ARC:
 {
 EDA_ANGLE startAngle;
 EDA_ANGLE endAngle;
 aShape->CalcArcAngles( startAngle, endAngle );
 
 if( outline_mode )
 {
 m_gal->DrawArcSegment( aShape->GetCenter(), aShape->GetRadius(), startAngle,
 endAngle - startAngle, thickness, m_maxError );
 }
 else
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 m_gal->DrawArcSegment( aShape->GetCenter(), aShape->GetRadius(), startAngle,
 endAngle - startAngle, thickness, m_maxError );
 }
 break;
 }
 
 case SHAPE_T::CIRCLE:
 if( outline_mode )
 {
 m_gal->DrawCircle( aShape->GetStart(), aShape->GetRadius() - thickness / 2 );
 m_gal->DrawCircle( aShape->GetStart(), aShape->GetRadius() + thickness / 2 );
 }
 else
 {
 m_gal->SetIsFill( aShape->IsFilled() );
 m_gal->SetIsStroke( thickness > 0 );
 m_gal->SetLineWidth( thickness );
 
 m_gal->DrawCircle( aShape->GetStart(), aShape->GetRadius() );
 }
 break;
 
 case SHAPE_T::POLY:
 {
 SHAPE_POLY_SET& shape = const_cast<PCB_SHAPE*>( aShape )->GetPolyShape();
 
 if( shape.OutlineCount() == 0 )
 break;
 
 if( outline_mode )
 {
 for( int ii = 0; ii < shape.OutlineCount(); ++ii )
 m_gal->DrawSegmentChain( shape.Outline( ii ), thickness );
 }
 else
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 if( thickness > 0 )
 {
 for( int ii = 0; ii < shape.OutlineCount(); ++ii )
 m_gal->DrawSegmentChain( shape.Outline( ii ), thickness );
 }
 
 if( aShape->IsFilled() )
 {
 // On Opengl, a not convex filled polygon is usually drawn by using triangles
 // as primitives. CacheTriangulation() can create basic triangle primitives to
 // draw the polygon solid shape on Opengl. GLU tessellation is much slower,
 // so currently we are using our tessellation.
 if( m_gal->IsOpenGlEngine() && !shape.IsTriangulationUpToDate() )
 shape.CacheTriangulation( true, true );
 
 m_gal->DrawPolygon( shape );
 }
 }
 
 break;
 }
 
 case SHAPE_T::BEZIER:
 if( outline_mode )
 {
 std::vector<VECTOR2D> output;
 std::vector<VECTOR2D> pointCtrl;
 
 pointCtrl.push_back( aShape->GetStart() );
 pointCtrl.push_back( aShape->GetBezierC1() );
 pointCtrl.push_back( aShape->GetBezierC2() );
 pointCtrl.push_back( aShape->GetEnd() );
 
 BEZIER_POLY converter( pointCtrl );
 converter.GetPoly( output, m_maxError );
 
 m_gal->DrawSegmentChain( aShape->GetBezierPoints(), thickness );
 }
 else
 {
 m_gal->SetIsFill( aShape->IsFilled() );
 m_gal->SetIsStroke( thickness > 0 );
 m_gal->SetLineWidth( thickness );
 
 if( aShape->GetBezierPoints().size() > 2 )
 {
 m_gal->DrawPolygon( aShape->GetBezierPoints() );
 }
 else
 {
 m_gal->DrawCurve( VECTOR2D( aShape->GetStart() ),
 VECTOR2D( aShape->GetBezierC1() ),
 VECTOR2D( aShape->GetBezierC2() ),
 VECTOR2D( aShape->GetEnd() ), m_maxError );
 }
 }
 
 break;
 
 case SHAPE_T::UNDEFINED:
 break;
 }
 }
 else
 {
 if( !outline_mode )
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 }
 
 std::vector<SHAPE*> shapes = aShape->MakeEffectiveShapes( true );
 
 for( SHAPE* shape : shapes )
 {
 STROKE_PARAMS::Stroke( shape, lineStyle, thickness, &m_pcbSettings,
 [&]( const VECTOR2I& a, const VECTOR2I& b )
 {
 m_gal->DrawSegment( a, b, thickness );
 } );
 }
 
 for( SHAPE* shape : shapes )
 delete shape;
 }
}
 
 
void PCB_PAINTER::strokeText( const wxString& aText, const VECTOR2I& aPosition,
 const TEXT_ATTRIBUTES& aAttrs, const KIFONT::METRICS& aFontMetrics )
{
 KIFONT::FONT* font = aAttrs.m_Font;
 
 if( !font )
 font = KIFONT::FONT::GetFont( wxEmptyString, aAttrs.m_Bold, aAttrs.m_Italic );
 
 m_gal->SetIsFill( font->IsOutline() );
 m_gal->SetIsStroke( font->IsStroke() );
 
 VECTOR2I pos( aPosition );
 VECTOR2I fudge( KiROUND( 0.16 * aAttrs.m_StrokeWidth ), 0 );
 
 RotatePoint( fudge, aAttrs.m_Angle );
 
 if( ( aAttrs.m_Halign == GR_TEXT_H_ALIGN_LEFT && !aAttrs.m_Mirrored )
 || ( aAttrs.m_Halign == GR_TEXT_H_ALIGN_RIGHT && aAttrs.m_Mirrored ) )
 {
 pos -= fudge;
 }
 else if( ( aAttrs.m_Halign == GR_TEXT_H_ALIGN_RIGHT && !aAttrs.m_Mirrored )
 || ( aAttrs.m_Halign == GR_TEXT_H_ALIGN_LEFT && aAttrs.m_Mirrored ) )
 {
 pos += fudge;
 }
 
 font->Draw( m_gal, aText, pos, aAttrs, aFontMetrics );
}
 
 
void PCB_PAINTER::draw( const PCB_REFERENCE_IMAGE* aBitmap, int aLayer )
{
 m_gal->Save();
 m_gal->Translate( aBitmap->GetPosition() );
 
 // When the image scale factor is not 1.0, we need to modify the actual as the image scale
 // factor is similar to a local zoom
 double img_scale = aBitmap->GetImageScale();
 
 if( img_scale != 1.0 )
 m_gal->Scale( VECTOR2D( img_scale, img_scale ) );
 
 if( aBitmap->IsSelected() || aBitmap->IsBrightened() )
 {
 COLOR4D color = m_pcbSettings.GetColor( aBitmap, LAYER_ANCHOR );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth * 2.0f );
 m_gal->SetIsFill( false );
 
 // Draws a bounding box.
 VECTOR2D bm_size( aBitmap->GetSize() );
 // bm_size is the actual image size in UI.
 // but m_gal scale was previously set to img_scale
 // so recalculate size relative to this image size.
 bm_size.x /= img_scale;
 bm_size.y /= img_scale;
 VECTOR2D origin( -bm_size.x / 2.0, -bm_size.y / 2.0 );
 VECTOR2D end = origin + bm_size;
 
 m_gal->DrawRectangle( origin, end );
 
 // Hard code reference images as opaque when selected. Otherwise cached layers will
 // not be rendered under the selected image because cached layers are rendered after
 // non-cached layers (e.g. bitmaps), which will have a closer Z order.
 m_gal->DrawBitmap( *aBitmap->GetImage(), 1.0 );
 }
 else
 m_gal->DrawBitmap( *aBitmap->GetImage(),
 m_pcbSettings.GetColor( aBitmap, aBitmap->GetLayer() ).a );
 
 
 m_gal->Restore();
}
 
 
void PCB_PAINTER::draw( const PCB_TEXT* aText, int aLayer )
{
 wxString resolvedText( aText->GetShownText( true ) );
 
 if( resolvedText.Length() == 0
 || !( aText->GetAttributes().m_Visible || aLayer == LAYER_HIDDEN_TEXT ) )
 return;
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW ) // happens only if locked
 {
 const COLOR4D color = m_pcbSettings.GetColor( aText, aLayer );
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( true );
 m_gal->SetFillColor( color );
 m_gal->SetStrokeColor( color );
 m_gal->SetLineWidth( m_lockedShadowMargin );
 
 SHAPE_POLY_SET poly;
 aText->TransformShapeToPolygon( poly, aText->GetLayer(), 0, m_maxError, ERROR_OUTSIDE );
 m_gal->DrawPolygon( poly );
 
 return;
 }
 
 const KIFONT::METRICS& metrics = aText->GetFontMetrics();
 TEXT_ATTRIBUTES attrs = aText->GetAttributes();
 const COLOR4D& color = m_pcbSettings.GetColor( aText, aLayer );
 bool outline_mode = !viewer_settings()->m_ViewersDisplay.m_DisplayTextFill;
 
 KIFONT::FONT* font = aText->GetFont();
 
 if( !font )
 {
 font = KIFONT::FONT::GetFont( m_pcbSettings.GetDefaultFont(), aText->IsBold(),
 aText->IsItalic() );
 }
 
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 attrs.m_Angle = aText->GetDrawRotation();
 
 if( aText->IsKnockout() )
 {
 SHAPE_POLY_SET finalPoly;
 aText->TransformTextToPolySet( finalPoly, 0, m_maxError, ERROR_INSIDE );
 finalPoly.Fracture( SHAPE_POLY_SET::PM_FAST );
 
 m_gal->SetIsStroke( false );
 m_gal->SetIsFill( true );
 m_gal->DrawPolygon( finalPoly );
 }
 else
 {
 if( outline_mode )
 attrs.m_StrokeWidth = m_pcbSettings.m_outlineWidth;
 else
 attrs.m_StrokeWidth = getLineThickness( aText->GetEffectiveTextPenWidth() );
 
 if( m_gal->IsFlippedX() && !aText->IsSideSpecific() )
 {
 VECTOR2I textPos = aText->GetTextPos();
 VECTOR2I textWidth = VECTOR2I( aText->GetTextBox().GetWidth(), 0 );
 RotatePoint( textWidth, textPos, aText->GetDrawRotation() );
 
 if( attrs.m_Mirrored )
 textPos -= textWidth;
 else
 textPos += textWidth;
 
 attrs.m_Mirrored = !attrs.m_Mirrored;
 strokeText( resolvedText, textPos, attrs, metrics );
 return;
 }
 
 std::vector<std::unique_ptr<KIFONT::GLYPH>>* cache = nullptr;
 
 if( font->IsOutline() )
 cache = aText->GetRenderCache( font, resolvedText );
 
 if( cache )
 {
 m_gal->SetLineWidth( attrs.m_StrokeWidth );
 m_gal->DrawGlyphs( *cache );
 }
 else
 {
 strokeText( resolvedText, aText->GetTextPos(), attrs, metrics );
 }
 }
 
 // Draw the umbilical line for texts in footprints
 FOOTPRINT* fp_parent = aText->GetParentFootprint();
 
 if( fp_parent && aText->IsSelected() )
 {
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 m_gal->SetStrokeColor( m_pcbSettings.GetColor( nullptr, LAYER_ANCHOR ) );
 m_gal->DrawLine( aText->GetTextPos(), fp_parent->GetPosition() );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_TEXTBOX* aTextBox, int aLayer )
{
 if( aTextBox->Type() == PCB_TABLECELL_T )
 {
 const PCB_TABLECELL* cell = static_cast<const PCB_TABLECELL*>( aTextBox );
 
 if( cell->GetColSpan() == 0 || cell->GetRowSpan() == 0 )
 return;
 }
 
 COLOR4D color = m_pcbSettings.GetColor( aTextBox, aLayer );
 int thickness = getLineThickness( aTextBox->GetWidth() );
 LINE_STYLE lineStyle = aTextBox->GetStroke().GetLineStyle();
 wxString resolvedText( aTextBox->GetShownText( true ) );
 
 KIFONT::FONT* font = aTextBox->GetFont();
 
 if( !font )
 {
 font = KIFONT::FONT::GetFont( m_pcbSettings.GetDefaultFont(), aTextBox->IsBold(),
 aTextBox->IsItalic() );
 }
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW ) // happens only if locked
 {
 const COLOR4D sh_color = m_pcbSettings.GetColor( aTextBox, aLayer );
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->SetFillColor( sh_color );
 m_gal->SetStrokeColor( sh_color );
 
 // Draw the box with a larger thickness than box thickness to show
 // the shadow mask
 std::vector<VECTOR2I> pts = aTextBox->GetCorners();
 int line_thickness = std::max( thickness*3, pcbIUScale.mmToIU( 0.2 ) );
 
 std::deque<VECTOR2D> dpts;
 
 for( const VECTOR2I& pt : pts )
 dpts.push_back( VECTOR2D( pt ) );
 
 dpts.push_back( VECTOR2D( pts[0] ) );
 
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( line_thickness );
 m_gal->DrawPolygon( dpts );
 }
 
 if( aTextBox->Type() == PCB_TABLECELL_T )
 {
 // Selection for tables is done with a background wash, so pass in nullptr to GetColor()
 // so we just get the "normal" (un-selected/un-brightened) color for the borders.
 color = m_pcbSettings.GetColor( nullptr, aLayer );
 }
 
 m_gal->SetFillColor( color );
 m_gal->SetStrokeColor( color );
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 
 if( aTextBox->Type() != PCB_TABLECELL_T && aTextBox->IsBorderEnabled() )
 {
 if( lineStyle <= LINE_STYLE::FIRST_TYPE )
 {
 if( thickness > 0 )
 {
 std::vector<VECTOR2I> pts = aTextBox->GetCorners();
 
 for( size_t ii = 0; ii < pts.size(); ++ii )
 m_gal->DrawSegment( pts[ii], pts[( ii + 1 ) % pts.size()], thickness );
 }
 }
 else
 {
 std::vector<SHAPE*> shapes = aTextBox->MakeEffectiveShapes( true );
 
 for( SHAPE* shape : shapes )
 {
 STROKE_PARAMS::Stroke( shape, lineStyle, thickness, &m_pcbSettings,
 [&]( const VECTOR2I& a, const VECTOR2I& b )
 {
 m_gal->DrawSegment( a, b, thickness );
 } );
 }
 
 for( SHAPE* shape : shapes )
 delete shape;
 }
 }
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW )
 {
 // For now, the textbox is a filled shape.
 // so the text drawn on LAYER_LOCKED_ITEM_SHADOW with a thick width is disabled
 // If enabled, the thick text position must be offsetted to be exactly on the
 // initial text, which is not easy, depending on its rotation and justification.
#if 0
 const COLOR4D sh_color = m_pcbSettings.GetColor( aTextBox, aLayer );
 m_gal->SetFillColor( sh_color );
 m_gal->SetStrokeColor( sh_color );
 attrs.m_StrokeWidth += m_lockedShadowMargin;
#else
 return;
#endif
 }
 
 if( resolvedText.Length() == 0 )
 return;
 
 const KIFONT::METRICS& metrics = aTextBox->GetFontMetrics();
 TEXT_ATTRIBUTES attrs = aTextBox->GetAttributes();
 attrs.m_StrokeWidth = getLineThickness( aTextBox->GetEffectiveTextPenWidth() );
 
 if( m_gal->IsFlippedX() && !aTextBox->IsSideSpecific() )
 {
 attrs.m_Mirrored = !attrs.m_Mirrored;
 strokeText( resolvedText, aTextBox->GetDrawPos( true ), attrs, metrics );
 return;
 }
 
 std::vector<std::unique_ptr<KIFONT::GLYPH>>* cache = nullptr;
 
 if( font->IsOutline() )
 cache = aTextBox->GetRenderCache( font, resolvedText );
 
 if( cache )
 {
 m_gal->SetLineWidth( attrs.m_StrokeWidth );
 m_gal->DrawGlyphs( *cache );
 }
 else
 {
 strokeText( resolvedText, aTextBox->GetDrawPos(), attrs, metrics );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_TABLE* aTable, int aLayer )
{
 for( PCB_TABLECELL* cell : aTable->GetCells() )
 draw( static_cast<PCB_TEXTBOX*>( cell ), aLayer );
 
 VECTOR2I pos = aTable->GetPosition();
 VECTOR2I end = aTable->GetEnd();
 EDA_ANGLE drawOrientation = aTable->GetOrientation();
 
 // Selection for tables is done with a background wash, so pass in nullptr to GetColor()
 // so we just get the "normal" (un-selected/un-brightened) color for the borders.
 COLOR4D color = m_pcbSettings.GetColor( nullptr, aLayer );
 int lineWidth;
 LINE_STYLE lineStyle;
 
 auto setupStroke =
 [&]( const STROKE_PARAMS& stroke )
 {
 lineWidth = getLineThickness( stroke.GetWidth() );
 lineStyle = stroke.GetLineStyle();
 
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 m_gal->SetLineWidth( lineWidth );
 };
 
 auto strokeShape =
 [&]( const SHAPE& shape )
 {
 STROKE_PARAMS::Stroke( &shape, lineStyle, lineWidth, &m_pcbSettings,
 [&]( VECTOR2I a, VECTOR2I b )
 {
 RotatePoint( a, pos, drawOrientation );
 RotatePoint( b, pos, drawOrientation );
 
 // DrawLine has problem with 0 length lines so enforce minimum
 if( a == b )
 m_gal->DrawLine( a+1, b );
 else
 m_gal->DrawLine( a, b );
 } );
 };
 
 auto strokeLine =
 [&]( VECTOR2I ptA, VECTOR2I ptB )
 {
 RotatePoint( ptA, pos, drawOrientation );
 RotatePoint( ptB, pos, drawOrientation );
 
 if( lineStyle <= LINE_STYLE::FIRST_TYPE )
 {
 m_gal->DrawLine( ptA, ptB );
 }
 else
 {
 SHAPE_SEGMENT seg( ptA, ptB );
 strokeShape( seg );
 }
 };
 
 auto strokeRect =
 [&]( VECTOR2I ptA, VECTOR2I ptB )
 {
 RotatePoint( ptA, pos, drawOrientation );
 RotatePoint( ptB, pos, drawOrientation );
 
 if( lineStyle <= LINE_STYLE::FIRST_TYPE )
 {
 m_gal->DrawRectangle( ptA, ptB );
 }
 else
 {
 SHAPE_RECT rect( BOX2I( ptA, ptB - ptA ) );
 strokeShape( rect );
 }
 };
 
 if( aTable->GetSeparatorsStroke().GetWidth() >= 0 )
 {
 setupStroke( aTable->GetSeparatorsStroke() );
 
 if( aTable->StrokeColumns() )
 {
 int x = pos.x;
 
 for( int col = 0; col < aTable->GetColCount() - 1; ++col )
 {
 int y = pos.y;
 
 for( int row = 0; row < aTable->GetRowCount(); ++row )
 {
 PCB_TABLECELL* cell = aTable->GetCell( row, col );
 int rowHeight = aTable->GetRowHeight( row );
 
 if( cell->GetColSpan() > 0 && cell->GetRowSpan() > 0 )
 strokeLine( VECTOR2I( x, y ), VECTOR2I( x, y + rowHeight ) );
 
 y += rowHeight;
 }
 
 x += aTable->GetColWidth( col );
 }
 }
 
 if( aTable->StrokeRows() )
 {
 int y = pos.y;
 
 for( int row = 0; row < aTable->GetRowCount() - 1; ++row )
 {
 int x = pos.x;
 
 for( int col = 0; col < aTable->GetColCount(); ++col )
 {
 PCB_TABLECELL* cell = aTable->GetCell( row, col );
 int colWidth = aTable->GetColWidth( col );
 
 if( cell->GetColSpan() > 0 && cell->GetRowSpan() > 0 )
 strokeLine( VECTOR2I( x, y ), VECTOR2I( x + colWidth, y ) );
 
 x += colWidth;
 }
 
 y += aTable->GetRowHeight( row );
 }
 }
 }
 
 if( aTable->GetBorderStroke().GetWidth() >= 0 )
 {
 setupStroke( aTable->GetBorderStroke() );
 
 if( aTable->StrokeHeader() )
 {
 int headerBottom = pos.y + aTable->GetRowHeight( 0 );
 
 strokeLine( VECTOR2I( pos.x, headerBottom ), VECTOR2I( end.x, headerBottom ) );
 }
 
 if( aTable->StrokeExternal() )
 strokeRect( pos, end );
 }
 
 // Highlight selected tablecells with a background wash.
 for( PCB_TABLECELL* cell : aTable->GetCells() )
 {
 if( aTable->IsSelected() || cell->IsSelected() )
 {
 std::vector<VECTOR2I> corners = cell->GetCorners();
 std::deque<VECTOR2D> pts;
 
 pts.insert( pts.end(), corners.begin(), corners.end() );
 
 m_gal->SetFillColor( color.WithAlpha( 0.5 ) );
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->DrawPolygon( pts );
 }
 }
}
 
 
void PCB_PAINTER::draw( const FOOTPRINT* aFootprint, int aLayer )
{
 if( aLayer == LAYER_ANCHOR )
 {
 const COLOR4D color = m_pcbSettings.GetColor( aFootprint, aLayer );
 
 // Keep the size and width constant, not related to the scale because the anchor
 // is just a marker on screen
 double anchorSize = 5.0 / m_gal->GetWorldScale(); // 5 pixels size
 double anchorThickness = 1.0 / m_gal->GetWorldScale(); // 1 pixels width
 
 // Draw anchor
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetStrokeColor( color );
 m_gal->SetLineWidth( anchorThickness );
 
 VECTOR2D center = aFootprint->GetPosition();
 m_gal->DrawLine( center - VECTOR2D( anchorSize, 0 ), center + VECTOR2D( anchorSize, 0 ) );
 m_gal->DrawLine( center - VECTOR2D( 0, anchorSize ), center + VECTOR2D( 0, anchorSize ) );
 }
 
 if( aLayer == LAYER_LOCKED_ITEM_SHADOW && m_frameType == FRAME_PCB_EDITOR ) // happens only if locked
 {
 const COLOR4D color = m_pcbSettings.GetColor( aFootprint, aLayer );
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->SetFillColor( color );
 
#if 0 // GetBoundingHull() can be very slow, especially for logos imported from graphics
 const SHAPE_POLY_SET& poly = aFootprint->GetBoundingHull();
 m_gal->DrawPolygon( poly );
#else
 BOX2I bbox = aFootprint->GetBoundingBox( false, false );
 VECTOR2I topLeft = bbox.GetPosition();
 VECTOR2I botRight = bbox.GetPosition() + bbox.GetSize();
 
 m_gal->DrawRectangle( topLeft, botRight );
 
 // Use segments to produce a margin with rounded corners
 m_gal->DrawSegment( topLeft, VECTOR2I( botRight.x, topLeft.y ), m_lockedShadowMargin );
 m_gal->DrawSegment( VECTOR2I( botRight.x, topLeft.y ), botRight, m_lockedShadowMargin );
 m_gal->DrawSegment( botRight, VECTOR2I( topLeft.x, botRight.y ), m_lockedShadowMargin );
 m_gal->DrawSegment( VECTOR2I( topLeft.x, botRight.y ), topLeft, m_lockedShadowMargin );
#endif
 }
 
 if( aLayer == LAYER_CONFLICTS_SHADOW )
 {
 const SHAPE_POLY_SET& frontpoly = aFootprint->GetCourtyard( F_CrtYd );
 const SHAPE_POLY_SET& backpoly = aFootprint->GetCourtyard( B_CrtYd );
 
 const COLOR4D color = m_pcbSettings.GetColor( aFootprint, aLayer );
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->SetFillColor( color );
 
 if( frontpoly.OutlineCount() > 0 )
 m_gal->DrawPolygon( frontpoly );
 
 if( backpoly.OutlineCount() > 0 )
 m_gal->DrawPolygon( backpoly );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_GROUP* aGroup, int aLayer )
{
 if( aLayer == LAYER_ANCHOR )
 {
 if( aGroup->IsSelected() && !( aGroup->GetParent() && aGroup->GetParent()->IsSelected() ) )
 {
 // Selected on our own; draw enclosing box
 }
 else if( aGroup->IsEntered() )
 {
 // Entered group; draw enclosing box
 }
 else
 {
 // Neither selected nor entered; draw nothing at the group level (ie: only draw
 // its members)
 return;
 }
 
 const COLOR4D color = m_pcbSettings.GetColor( aGroup, LAYER_ANCHOR );
 
 m_gal->SetStrokeColor( color );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth * 2.0f );
 
 BOX2I bbox = aGroup->GetBoundingBox();
 VECTOR2I topLeft = bbox.GetPosition();
 VECTOR2I width = VECTOR2I( bbox.GetWidth(), 0 );
 VECTOR2I height = VECTOR2I( 0, bbox.GetHeight() );
 
 m_gal->DrawLine( topLeft, topLeft + width );
 m_gal->DrawLine( topLeft + width, topLeft + width + height );
 m_gal->DrawLine( topLeft + width + height, topLeft + height );
 m_gal->DrawLine( topLeft + height, topLeft );
 
 wxString name = aGroup->GetName();
 
 if( name.IsEmpty() )
 return;
 
 int ptSize = 12;
 int scaledSize = abs( KiROUND( m_gal->GetScreenWorldMatrix().GetScale().x * ptSize ) );
 int unscaledSize = pcbIUScale.MilsToIU( ptSize );
 
 // Scale by zoom a bit, but not too much
 int textSize = ( scaledSize + ( unscaledSize * 2 ) ) / 3;
 VECTOR2I textOffset = VECTOR2I( width.x / 2, -KiROUND( textSize * 0.5 ) );
 VECTOR2I titleHeight = VECTOR2I( 0, KiROUND( textSize * 2.0 ) );
 
 if( PrintableCharCount( name ) * textSize < bbox.GetWidth() )
 {
 m_gal->DrawLine( topLeft, topLeft - titleHeight );
 m_gal->DrawLine( topLeft - titleHeight, topLeft + width - titleHeight );
 m_gal->DrawLine( topLeft + width - titleHeight, topLeft + width );
 
 TEXT_ATTRIBUTES attrs;
 attrs.m_Italic = true;
 attrs.m_Halign = GR_TEXT_H_ALIGN_CENTER;
 attrs.m_Valign = GR_TEXT_V_ALIGN_BOTTOM;
 attrs.m_Size = VECTOR2I( textSize, textSize );
 attrs.m_StrokeWidth = GetPenSizeForNormal( textSize );
 
 KIFONT::FONT::GetFont()->Draw( m_gal, aGroup->GetName(), topLeft + textOffset, attrs,
 aGroup->GetFontMetrics() );
 }
 }
}
 
 
void PCB_PAINTER::draw( const ZONE* aZone, int aLayer )
{
 if( aLayer == LAYER_CONFLICTS_SHADOW )
 {
 COLOR4D color = m_pcbSettings.GetColor( aZone, aLayer );
 
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 m_gal->SetFillColor( color );
 
 m_gal->DrawPolygon( aZone->Outline()->Outline( 0 ) );
 return;
 }
 
 /*
 * aLayer will be the virtual zone layer (LAYER_ZONE_START, ... in GAL_LAYER_ID)
 * This is used for draw ordering in the GAL.
 * The color for the zone comes from the associated copper layer ( aLayer - LAYER_ZONE_START )
 * and the visibility comes from the combination of that copper layer and LAYER_ZONES
 */
 PCB_LAYER_ID layer;
 
 if( IsZoneFillLayer( aLayer ) )
 layer = ToLAYER_ID( aLayer - LAYER_ZONE_START );
 else
 layer = ToLAYER_ID( aLayer );
 
 if( !aZone->IsOnLayer( layer ) )
 return;
 
 COLOR4D color = m_pcbSettings.GetColor( aZone, layer );
 std::deque<VECTOR2D> corners;
 ZONE_DISPLAY_MODE displayMode = m_pcbSettings.m_ZoneDisplayMode;
 
 // Draw the outline
 if( !IsZoneFillLayer( aLayer ) )
 {
 const SHAPE_POLY_SET* outline = aZone->Outline();
 bool allowDrawOutline = aZone->GetHatchStyle() != ZONE_BORDER_DISPLAY_STYLE::INVISIBLE_BORDER;
 
 if( allowDrawOutline && !m_pcbSettings.m_isPrinting && outline && outline->OutlineCount() > 0 )
 {
 m_gal->SetStrokeColor( color.a > 0.0 ? color.WithAlpha( 1.0 ) : color );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 
 // Draw each contour (main contour and holes)
 
 /*
 * m_gal->DrawPolygon( *outline );
 * should be enough, but currently does not work to draw holes contours in a complex
 * polygon so each contour is draw as a simple polygon
 */
 
 // Draw the main contour(s?)
 for( int ii = 0; ii < outline->OutlineCount(); ++ii )
 {
 m_gal->DrawPolyline( outline->COutline( ii ) );
 
 // Draw holes
 int holes_count = outline->HoleCount( ii );
 
 for( int jj = 0; jj < holes_count; ++jj )
 m_gal->DrawPolyline( outline->CHole( ii, jj ) );
 }
 
 // Draw hatch lines
 for( const SEG& hatchLine : aZone->GetHatchLines() )
 m_gal->DrawLine( hatchLine.A, hatchLine.B );
 }
 }
 
 // Draw the filling
 if( IsZoneFillLayer( aLayer )
 && ( displayMode == ZONE_DISPLAY_MODE::SHOW_FILLED
 || displayMode == ZONE_DISPLAY_MODE::SHOW_FRACTURE_BORDERS
 || displayMode == ZONE_DISPLAY_MODE::SHOW_TRIANGULATION ) )
 {
 const std::shared_ptr<SHAPE_POLY_SET>& polySet = aZone->GetFilledPolysList( layer );
 
 if( polySet->OutlineCount() == 0 ) // Nothing to draw
 return;
 
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetLineWidth( 0 );
 
 if( displayMode == ZONE_DISPLAY_MODE::SHOW_FILLED )
 {
 m_gal->SetIsFill( true );
 m_gal->SetIsStroke( false );
 }
 else
 {
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 }
 
 // On Opengl, a not convex filled polygon is usually drawn by using triangles
 // as primitives. CacheTriangulation() can create basic triangle primitives to
 // draw the polygon solid shape on Opengl. GLU tessellation is much slower,
 // so currently we are using our tessellation.
 if( m_gal->IsOpenGlEngine() && !polySet->IsTriangulationUpToDate() )
 polySet->CacheTriangulation( true, true );
 
 m_gal->DrawPolygon( *polySet, displayMode == ZONE_DISPLAY_MODE::SHOW_TRIANGULATION );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_DIMENSION_BASE* aDimension, int aLayer )
{
 const COLOR4D& color = m_pcbSettings.GetColor( aDimension, aLayer );
 
 m_gal->SetStrokeColor( color );
 m_gal->SetFillColor( color );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 
 bool outline_mode = !viewer_settings()->m_ViewersDisplay.m_DisplayGraphicsFill;
 
 if( outline_mode )
 m_gal->SetLineWidth( m_pcbSettings.m_outlineWidth );
 else
 m_gal->SetLineWidth( getLineThickness( aDimension->GetLineThickness() ) );
 
 // Draw dimension shapes
 // TODO(JE) lift this out
 for( const std::shared_ptr<SHAPE>& shape : aDimension->GetShapes() )
 {
 switch( shape->Type() )
 {
 case SH_SEGMENT:
 {
 const SEG& seg = static_cast<const SHAPE_SEGMENT*>( shape.get() )->GetSeg();
 m_gal->DrawLine( seg.A, seg.B );
 break;
 }
 
 case SH_CIRCLE:
 {
 int radius = static_cast<const SHAPE_CIRCLE*>( shape.get() )->GetRadius();
 m_gal->DrawCircle( shape->Centre(), radius );
 break;
 }
 
 default:
 break;
 }
 }
 
 // Draw text
 wxString resolvedText = aDimension->GetShownText( true );
 TEXT_ATTRIBUTES attrs = aDimension->GetAttributes();
 
 if( m_gal->IsFlippedX() && !aDimension->IsSideSpecific() )
 attrs.m_Mirrored = !attrs.m_Mirrored;
 
 if( outline_mode )
 attrs.m_StrokeWidth = m_pcbSettings.m_outlineWidth;
 else
 attrs.m_StrokeWidth = getLineThickness( aDimension->GetEffectiveTextPenWidth() );
 
 std::vector<std::unique_ptr<KIFONT::GLYPH>>* cache = nullptr;
 
 if( aDimension->GetFont() && aDimension->GetFont()->IsOutline() )
 cache = aDimension->GetRenderCache( aDimension->GetFont(), resolvedText );
 
 if( cache )
 {
 for( const std::unique_ptr<KIFONT::GLYPH>& glyph : *cache )
 m_gal->DrawGlyph( *glyph.get() );
 }
 else
 {
 strokeText( resolvedText, aDimension->GetTextPos(), attrs, aDimension->GetFontMetrics() );
 }
}
 
 
void PCB_PAINTER::draw( const PCB_TARGET* aTarget )
{
 const COLOR4D& strokeColor = m_pcbSettings.GetColor( aTarget, aTarget->GetLayer() );
 VECTOR2D position( aTarget->GetPosition() );
 double size, radius;
 
 m_gal->SetLineWidth( getLineThickness( aTarget->GetWidth() ) );
 m_gal->SetStrokeColor( strokeColor );
 m_gal->SetIsFill( false );
 m_gal->SetIsStroke( true );
 
 m_gal->Save();
 m_gal->Translate( position );
 
 if( aTarget->GetShape() )
 {
 // shape x
 m_gal->Rotate( M_PI / 4.0 );
 size = 2.0 * aTarget->GetSize() / 3.0;
 radius = aTarget->GetSize() / 2.0;
 }
 else
 {
 // shape +
 size = aTarget->GetSize() / 2.0;
 radius = aTarget->GetSize() / 3.0;
 }
 
 m_gal->DrawLine( VECTOR2D( -size, 0.0 ), VECTOR2D( size, 0.0 ) );
 m_gal->DrawLine( VECTOR2D( 0.0, -size ), VECTOR2D( 0.0, size ) );
 m_gal->DrawCircle( VECTOR2D( 0.0, 0.0 ), radius );
 
 m_gal->Restore();
}
 
 
void PCB_PAINTER::draw( const PCB_MARKER* aMarker, int aLayer )
{
 bool isShadow = aLayer == LAYER_MARKER_SHADOWS;
 
 // Don't paint invisible markers.
 // It would be nice to do this through layer dependencies but we can't do an "or" there today
 if( aMarker->GetBoard() && !aMarker->GetBoard()->IsElementVisible( aMarker->GetColorLayer() ) )
 return;
 
 const_cast<PCB_MARKER*>( aMarker )->SetZoom( 1.0 / sqrt( m_gal->GetZoomFactor() ) );
 
 SHAPE_LINE_CHAIN polygon;
 aMarker->ShapeToPolygon( polygon );
 
 COLOR4D color = m_pcbSettings.GetColor( aMarker, isShadow ? LAYER_MARKER_SHADOWS
 : aMarker->GetColorLayer() );
 
 m_gal->Save();
 m_gal->Translate( aMarker->GetPosition() );
 
 if( isShadow )
 {
 m_gal->SetStrokeColor( color );
 m_gal->SetIsStroke( true );
 m_gal->SetLineWidth( aMarker->MarkerScale() );
 }
 else
 {
 m_gal->SetFillColor( color );
 m_gal->SetIsFill( true );
 }
 
 m_gal->DrawPolygon( polygon );
 m_gal->Restore();
}
 
 
const double PCB_RENDER_SETTINGS::MAX_FONT_SIZE = pcbIUScale.mmToIU( 10.0 );