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Handle cases where Simplify removes all outlines

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This could theoretically happen for a fully degenerate polygon

Fixes https://gitlab.com/kicad/code/kicad/issues/12120

(cherry picked from commit 5a37211fdb0d565be640ea1c224f68f1b0475ba3)
This commit is contained in:
Seth Hillbrand 2022-08-26 16:41:04 -07:00
parent b72675ba92
commit b324abefe5
2 changed files with 17 additions and 14 deletions
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5
bitmap2component/bitmap2component.cpp
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@ -503,8 +503,8 @@ void BITMAPCONV_INFO::createOutputData( BMP2CMP_MOD_LAYER aModLayer )
polyset_areas.BooleanSubtract( polyset_holes, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE ); polyset_areas.BooleanSubtract( polyset_holes, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
// Ensure there are no self intersecting polygons // Ensure there are no self intersecting polygons
polyset_areas.NormalizeAreaOutlines(); if( polyset_areas.NormalizeAreaOutlines() )
{
// Convert polygon with holes to a unique polygon // Convert polygon with holes to a unique polygon
polyset_areas.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE ); polyset_areas.Fracture( SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
@ -519,6 +519,7 @@ void BITMAPCONV_INFO::createOutputData( BMP2CMP_MOD_LAYER aModLayer )
polyset_holes.RemoveAllContours(); polyset_holes.RemoveAllContours();
main_outline = true; main_outline = true;
} }
}
paths = paths->next; paths = paths->next;
} }

2
libs/kimath/src/geometry/shape_poly_set.cpp
View File

@ -1294,6 +1294,8 @@ int SHAPE_POLY_SET::NormalizeAreaOutlines()
BooleanSubtract( holesBuffer, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE ); BooleanSubtract( holesBuffer, SHAPE_POLY_SET::PM_STRICTLY_SIMPLE );
} }
// In degenerate cases, simplify might return no outlines
if( OutlineCount() > 0 )
RemoveNullSegments(); RemoveNullSegments();
return OutlineCount(); return OutlineCount();