drc_test_provider_annular_width.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2004-2020 KiCad Developers.
 *
 * 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.
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 * GNU General Public License for more details.
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 * or you may search the http://www.gnu.org website for the version 2 license,
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 */

#include <common.h>
#include <pcb_track.h>
#include <drc/drc_engine.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider.h>

/*
 Via/pad annular ring width test. Checks if there's sufficient copper ring around
 PTH/NPTH holes (vias/pads)
 Errors generated:
 - DRCE_ANNULAR_WIDTH

 Todo:
 - check pad holes too.
 - pad stack support (different IAR/OAR values depending on layer)
*/

class DRC_TEST_PROVIDER_ANNULAR_WIDTH : public DRC_TEST_PROVIDER
{
public:
 DRC_TEST_PROVIDER_ANNULAR_WIDTH()
 {
 }

 virtual ~DRC_TEST_PROVIDER_ANNULAR_WIDTH()
 {
 }

 virtual bool Run() override;

 virtual const wxString GetName() const override
 {
 return "annular_width";
 };

 virtual const wxString GetDescription() const override
 {
 return "Tests pad/via annular rings";
 }

 virtual std::set<DRC_CONSTRAINT_T> GetConstraintTypes() const override;

 int GetNumPhases() const override;
};


bool DRC_TEST_PROVIDER_ANNULAR_WIDTH::Run()
{
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_ANNULAR_WIDTH ) )
 {
 reportAux( "Annular width violations ignored. Skipping check." );
 return true; // continue with other tests
 }

 const int delta = 250; // This is the number of tests between 2 calls to the progress bar

 if( !m_drcEngine->HasRulesForConstraintType( ANNULAR_WIDTH_CONSTRAINT ) )
 {
 reportAux( "No annular width constraints found. Tests not run." );
 return true; // continue with other tests
 }

 if( !reportPhase( _( "Checking via annular rings..." ) ) )
 return false; // DRC cancelled

 auto checkAnnularWidth =
 [&]( BOARD_ITEM* item ) -> bool
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_ANNULAR_WIDTH ) )
 return false;

 int v_min = 0;
 int v_max = 0;
 PCB_VIA* via = dyn_cast<PCB_VIA*>( item );

 // fixme: check minimum IAR/OAR ring for THT pads too
 if( !via )
 return true;

 // PADSTACKS TODO: once we have padstacks we'll need to run this per-layer....
 auto constraint = m_drcEngine->EvalRules( ANNULAR_WIDTH_CONSTRAINT, via, nullptr,
 UNDEFINED_LAYER );
 int annularWidth = ( via->GetWidth() - via->GetDrillValue() ) / 2;
 bool fail_min = false;
 bool fail_max = false;

 if( constraint.Value().HasMin() )
 {
 v_min = constraint.Value().Min();
 fail_min = annularWidth < v_min;
 }

 if( constraint.Value().HasMax() )
 {
 v_max = constraint.Value().Max();
 fail_max = annularWidth > v_max;
 }

 if( fail_min || fail_max )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_ANNULAR_WIDTH );

 if( fail_min )
 m_msg.Printf( _( "(%s min annular width %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( userUnits(), v_min ),
 MessageTextFromValue( userUnits(), annularWidth ) );

 if( fail_max )
 m_msg.Printf( _( "(%s max annular width %s; actual %s)" ),
 constraint.GetName(),
 MessageTextFromValue( userUnits(), v_max ),
 MessageTextFromValue( userUnits(), annularWidth ) );

 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + m_msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );

 reportViolation( drcItem, via->GetPosition() );
 }

 return true;
 };

 BOARD* board = m_drcEngine->GetBoard();
 int ii = 0;

 for( PCB_TRACK* item : board->Tracks() )
 {
 if( !reportProgress( ii++, board->Tracks().size(), delta ) )
 break;

 if( !checkAnnularWidth( item ) )
 return false; // DRC cancelled
 }

 reportRuleStatistics();

 return true;
}


int DRC_TEST_PROVIDER_ANNULAR_WIDTH::GetNumPhases() const
{
 return 1;
}


std::set<DRC_CONSTRAINT_T> DRC_TEST_PROVIDER_ANNULAR_WIDTH::GetConstraintTypes() const
{
 return { ANNULAR_WIDTH_CONSTRAINT };
}


namespace detail
{
static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_ANNULAR_WIDTH> dummy;
}