drc_test_provider_text_dims.cpp

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/*
 * This program source code file is part of KiCad, a free EDA CAD application.
 *
 * Copyright (C) 2021-2023 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.
 *
 * 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 <macros.h>
#include <pcb_field.h>
#include <pcb_text.h>
#include <pcb_textbox.h>
#include <drc/drc_engine.h>
#include <drc/drc_item.h>
#include <drc/drc_rule.h>
#include <drc/drc_test_provider.h>
#include <font/font.h>
 
 
/*
 Text dimensions tests.
 Errors generated:
 - DRCE_TEXT_HEIGHT
 - DRCE_TEXT_THICKNESS
*/
 
class DRC_TEST_PROVIDER_TEXT_DIMS : public DRC_TEST_PROVIDER
{
public:
 DRC_TEST_PROVIDER_TEXT_DIMS()
 {
 }
 
 virtual ~DRC_TEST_PROVIDER_TEXT_DIMS()
 {
 }
 
 virtual bool Run() override;
 
 virtual const wxString GetName() const override
 {
 return wxT( "text_dimensions" );
 };
 
 virtual const wxString GetDescription() const override
 {
 return wxT( "Tests text height and thickness" );
 }
};
 
 
bool DRC_TEST_PROVIDER_TEXT_DIMS::Run()
{
 const int progressDelta = 250;
 int count = 0;
 int ii = 0;
 
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_TEXT_HEIGHT )
 && m_drcEngine->IsErrorLimitExceeded( DRCE_TEXT_THICKNESS ) )
 {
 reportAux( wxT( "Text dimension violations ignored. Tests not run." ) );
 return true; // continue with other tests
 }
 
 if( !m_drcEngine->HasRulesForConstraintType( TEXT_HEIGHT_CONSTRAINT )
 && !m_drcEngine->HasRulesForConstraintType( TEXT_THICKNESS_CONSTRAINT ) )
 {
 reportAux( wxT( "No text height or text thickness constraints found. Tests not run." ) );
 return true; // continue with other tests
 }
 
 if( !reportPhase( _( "Checking text dimensions..." ) ) )
 return false; // DRC cancelled
 
 auto checkTextHeight =
 [&]( BOARD_ITEM* item, EDA_TEXT* text ) -> bool
 {
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_TEXT_HEIGHT ) )
 return false;
 
 DRC_CONSTRAINT constraint = m_drcEngine->EvalRules( TEXT_HEIGHT_CONSTRAINT, item,
 nullptr, item->GetLayer() );
 
 if( constraint.GetSeverity() == RPT_SEVERITY_IGNORE )
 return true;
 
 int actualHeight = text->GetTextSize().y;
 
 if( constraint.Value().HasMin() && actualHeight < constraint.Value().Min() )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_TEXT_HEIGHT );
 wxString msg = formatMsg( _( "(%s min height %s; actual %s)" ),
 constraint.GetName(),
 constraint.Value().Min(),
 actualHeight );
 
 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, item->GetPosition(), item->GetLayer() );
 }
 
 if( constraint.Value().HasMax() && actualHeight > constraint.Value().Max() )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_TEXT_HEIGHT );
 wxString msg = formatMsg( _( "(%s max height %s; actual %s)" ),
 constraint.GetName(),
 constraint.Value().Max(),
 actualHeight );
 
 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, item->GetPosition(), item->GetLayer() );
 }
 
 return true;
 };
 
 auto checkTextThickness =
 [&]( BOARD_ITEM* item, EDA_TEXT* text ) -> bool
 {
 DRC_CONSTRAINT constraint = m_drcEngine->EvalRules( TEXT_THICKNESS_CONSTRAINT, item,
 nullptr, item->GetLayer() );
 
 if( constraint.GetSeverity() == RPT_SEVERITY_IGNORE )
 return true;
 
 KIFONT::FONT* font = text->GetFont();
 
 if( !font )
 font = KIFONT::FONT::GetFont( wxEmptyString, text->IsBold(), text->IsItalic() );
 
 if( font->IsOutline() )
 {
 if( !constraint.Value().HasMin() || constraint.Value().Min() <= 0 )
 return true;
 
 auto* glyphs = text->GetRenderCache( font, text->GetShownText( true ) );
 bool collapsedStroke = false;
 bool collapsedArea = false;
 
 for( const std::unique_ptr<KIFONT::GLYPH>& glyph : *glyphs )
 {
 // Ensure the glyph is a OUTLINE_GLYPH (for instance, overbars in outline
 // font text are represented as STROKE_GLYPHs).
 if( !glyph->IsOutline() )
 continue;
 
 auto outlineGlyph = static_cast<KIFONT::OUTLINE_GLYPH*>( glyph.get() );
 int outlineCount = outlineGlyph->OutlineCount();
 int holeCount = 0;
 
 if( outlineCount == 0 )
 continue; // ignore spaces
 
 for( ii = 0; ii < outlineCount; ++ii )
 holeCount += outlineGlyph->HoleCount( ii );
 
 SHAPE_POLY_SET poly = outlineGlyph->CloneDropTriangulation();
 poly.Deflate( constraint.Value().Min() / 2,
 CORNER_STRATEGY::CHAMFER_ALL_CORNERS, ARC_LOW_DEF );
 poly.Simplify( SHAPE_POLY_SET::PM_FAST );
 
 int resultingOutlineCount = poly.OutlineCount();
 int resultingHoleCount = 0;
 
 for( ii = 0; ii < resultingOutlineCount; ++ii )
 resultingHoleCount += poly.HoleCount( ii );
 
 if( ( resultingOutlineCount != outlineCount )
 || ( resultingHoleCount != holeCount ) )
 {
 collapsedStroke = true;
 break;
 }
 
 double glyphArea = outlineGlyph->Area();
 
 if( glyphArea == 0 )
 continue;
 
 poly.Inflate( constraint.Value().Min() / 2,
 CORNER_STRATEGY::CHAMFER_ALL_CORNERS, ARC_LOW_DEF, true );
 
 double resultingGlyphArea = poly.Area();
 
 if( ( std::abs( resultingGlyphArea - glyphArea ) / glyphArea ) > 0.1 )
 {
 collapsedArea = true;
 break;
 }
 }
 
 if( collapsedStroke || collapsedArea )
 {
 auto drcItem = DRC_ITEM::Create( DRCE_TEXT_THICKNESS );
 wxString msg;
 
 msg = _( "(TrueType font characters with insufficient stroke weight)" );
 
 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, item->GetPosition(), item->GetLayer() );
 }
 }
 else
 {
 int actualThickness = text->GetEffectiveTextPenWidth();
 
 if( constraint.Value().HasMin() && actualThickness < constraint.Value().Min() )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_TEXT_THICKNESS );
 wxString msg = formatMsg( _( "(%s min thickness %s; actual %s)" ),
 constraint.GetName(),
 constraint.Value().Min(),
 actualThickness );
 
 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, item->GetPosition(), item->GetLayer() );
 }
 
 if( constraint.Value().HasMax() && actualThickness > constraint.Value().Max() )
 {
 std::shared_ptr<DRC_ITEM> drcItem = DRC_ITEM::Create( DRCE_TEXT_THICKNESS );
 wxString msg = formatMsg( _( "(%s max thickness %s; actual %s)" ),
 constraint.GetName(),
 constraint.Value().Max(),
 actualThickness );
 
 drcItem->SetErrorMessage( drcItem->GetErrorText() + wxS( " " ) + msg );
 drcItem->SetItems( item );
 drcItem->SetViolatingRule( constraint.GetParentRule() );
 
 reportViolation( drcItem, item->GetPosition(), item->GetLayer() );
 }
 }
 
 return true;
 };
 
 static const std::vector<KICAD_T> itemTypes = { PCB_FIELD_T, PCB_TEXT_T, PCB_TEXTBOX_T };
 
 forEachGeometryItem( itemTypes, LSET::AllLayersMask(),
 [&]( BOARD_ITEM* item ) -> bool
 {
 ++count;
 return true;
 } );
 
 forEachGeometryItem( itemTypes, LSET::AllLayersMask(),
 [&]( BOARD_ITEM* item ) -> bool
 {
 if( !reportProgress( ii++, count, progressDelta ) )
 return false;
 
 EDA_TEXT* text = nullptr;
 int strikes = 0;
 
 switch( item->Type() )
 {
 case PCB_FIELD_T: text = static_cast<PCB_FIELD*>( item ); break;
 case PCB_TEXT_T: text = static_cast<PCB_TEXT*>( item ); break;
 case PCB_TEXTBOX_T: text = static_cast<PCB_TEXTBOX*>( item ); break;
 default: UNIMPLEMENTED_FOR( item->GetClass() ); break;
 }
 
 if( !text || !text->IsVisible() )
 return true;
 
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_TEXT_THICKNESS ) )
 strikes++;
 else
 checkTextThickness( item, text );
 
 if( m_drcEngine->IsErrorLimitExceeded( DRCE_TEXT_HEIGHT ) )
 strikes++;
 else
 checkTextHeight( item, text );
 
 if( strikes >= 2 )
 return false;
 
 return true;
 } );
 
 reportRuleStatistics();
 
 return !m_drcEngine->IsCancelled();
}
 
 
namespace detail
{
static DRC_REGISTER_TEST_PROVIDER<DRC_TEST_PROVIDER_TEXT_DIMS> dummy;
}