A few bug fixes and test updates

- edge pairs are normalized before turning them into polygons.
  This makes flat and deep implementation more consistent.
- deep region and flat regions were not cooperating in geo
  checks
- unnamed layers are not registered in make_layer - this
  does not make sense and will just hold a fake ref
- tests now use GDS to represent texts after transformation
  (with orientation, OASIS can't do this)
- texts are more consistently handled in the tests
- test debug output is not written in the same format
  than golden data unless special normalization is
  requested.
- a non-orientable polygon was converted to orientable in
  a text because this can be represented in GDS consistently
- DRC testsuite uses "polygons" instead of "input" to achieve
  identical behavior for deep and flat mode with respect to
  texts
- dbRegionTests are updated because texts are not allowed
  for non-original layers too

src/db/db/dbAsIfFlatEdgePairs.cc

@@ -292,7 +292,7 @@ AsIfFlatEdgePairs::insert_into_as_polygons (Layout *layout, db::cell_index_type
 
   db::Shapes &shapes = layout->cell (into_cell).shapes (into_layer);
   for (EdgePairsIterator e (begin ()); ! e.at_end (); ++e) {
-    shapes.insert (e->to_simple_polygon (enl));
+    shapes.insert (e->normalized ().to_simple_polygon (enl));
   }
 }
 

src/db/db/dbDeepRegion.cc

@@ -247,7 +247,7 @@ DeepRegion::has_valid_polygons () const
 bool
 DeepRegion::has_valid_merged_polygons () const
 {
-  return merged_semantics ();
+  return false;
 }
 
 const db::RecursiveShapeIterator *

src/db/db/dbDeepShapeStore.cc

@@ -873,7 +873,7 @@ DeepShapeStore::insert_as_polygons (const DeepLayer &deep_layer, db::Layout *int
 
       if (s->is_edge_pair ()) {
 
-        out.insert (s->edge_pair ().to_simple_polygon (enl));
+        out.insert (s->edge_pair ().normalized ().to_simple_polygon (enl));
 
       } else if (s->is_path () || s->is_polygon () || s->is_box ()) {
 

src/db/db/dbFlatEdgePairs.cc

@@ -185,7 +185,7 @@ FlatEdgePairs::insert_into_as_polygons (Layout *layout, db::cell_index_type into
 {
   db::Shapes &out = layout->cell (into_cell).shapes (into_layer);
   for (EdgePairsIterator p (begin ()); ! p.at_end (); ++p) {
-    out.insert (p->to_simple_polygon (enl));
+    out.insert (p->normalized ().to_simple_polygon (enl));
   }
 }
 

src/db/db/dbLayoutToNetlist.cc

@@ -129,7 +129,9 @@ db::Region *LayoutToNetlist::make_layer (const std::string &n)
   si.shape_flags (db::ShapeIterator::Nothing);
 
   std::auto_ptr <db::Region> region (new db::Region (si, dss ()));
-  register_layer (*region, n);
+  if (! n.empty ()) {
+    register_layer (*region, n);
+  }
   return region.release ();
 }
 
@@ -140,7 +142,9 @@ db::Region *LayoutToNetlist::make_layer (unsigned int layer_index, const std::st
   si.shape_flags (db::ShapeIterator::All);
 
   std::auto_ptr <db::Region> region (new db::Region (si, dss ()));
-  register_layer (*region, n);
+  if (! n.empty ()) {
+    register_layer (*region, n);
+  }
   return region.release ();
 }
 

src/db/db/dbLayoutToNetlist.h

@@ -305,6 +305,30 @@ public:
    */
   void set_netlist_extracted ();
 
+  /**
+   *  @brief Gets the internal DeepShapeStore object
+   *
+   *  This method is intended for special cases, i.e. for the master
+   *  LayoutToNetlist object in the DRC environment. The DSS provided
+   *  for DRC needs to be initialized properly for text representation.
+   */
+  db::DeepShapeStore &dss ()
+  {
+    tl_assert (mp_dss.get () != 0);
+    return *mp_dss;
+  }
+
+  /**
+   *  @brief Gets the internal DeepShapeStore object (const version)
+   *
+   *  See the non-const version for details.
+   */
+  const db::DeepShapeStore &dss () const
+  {
+    tl_assert (mp_dss.get () != 0);
+    return *mp_dss;
+  }
+
   /**
    *  @brief Gets the internal layout
    */
@@ -526,18 +550,6 @@ private:
   bool m_is_flat;
   db::DeepLayer m_dummy_layer;
 
-  db::DeepShapeStore &dss ()
-  {
-    tl_assert (mp_dss.get () != 0);
-    return *mp_dss;
-  }
-
-  const db::DeepShapeStore &dss () const
-  {
-    tl_assert (mp_dss.get () != 0);
-    return *mp_dss;
-  }
-
   void init ();
   size_t search_net (const db::ICplxTrans &trans, const db::Cell *cell, const db::local_cluster<db::PolygonRef> &test_cluster, std::vector<db::InstElement> &rev_inst_path);
   void build_net_rec (const db::Net &net, db::Layout &target, db::Cell &target_cell, const std::map<unsigned int, const db::Region *> &lmap, const char *net_cell_name_prefix, const char *cell_name_prefix, const char *device_cell_name_prefix, std::map<std::pair<db::cell_index_type, size_t>, db::cell_index_type> &cmap, const ICplxTrans &tr) const;

src/db/db/dbTestSupport.cc

@@ -59,9 +59,13 @@ void compare_layouts (tl::TestBase *_this, const db::Layout &layout, const std::
   if (norm == WriteGDS2) {
     tmp_file = _this->tmp_file (tl::sprintf ("tmp_%x.gds", hash));
     options.set_format ("GDS2");
-  } else {
+  } else if (norm == WriteOAS) {
     tmp_file = _this->tmp_file (tl::sprintf ("tmp_%x.oas", hash));
     options.set_format ("OASIS");
+  } else {
+    //  write the temp file in the same format than the au file
+    tmp_file = _this->tmp_file (tl::sprintf ("tmp_%x." + tl::extension (au_file), hash));
+    options.set_format_from_filename (tmp_file);
   }
 
   {

src/db/unit_tests/dbLayoutToNetlistTests.cc

@@ -2111,7 +2111,11 @@ TEST(9_FlatExtractionWithExternalDSS)
 
   db::Cell &tc = ly.cell (*ly.begin_top_down ());
 
-  db::DeepShapeStore dss;
+  //  NOTE: we use a DSS from a LayoutToNetlist object - this one is initialized properly
+  //  with the text representation settings.
+  db::LayoutToNetlist l2n_master;
+  db::DeepShapeStore &dss = l2n_master.dss ();
+
   db::LayoutToNetlist l2n (&dss);
 
   std::auto_ptr<db::Region> rbulk (new db::Region ());

src/drc/unit_tests/drcBasicTests.cc

@@ -30,7 +30,7 @@ TEST(1)
   std::string input = tl::testsrc ();
   input += "/testdata/drc/drctest.gds";
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcBasicTests_au.oas";
+  au += "/testdata/drc/drcBasicTests_au.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 

src/drc/unit_tests/drcSimpleTests.cc

@@ -31,7 +31,7 @@ TEST(1)
   rs += "/testdata/drc/drcSimpleTests_1.drc";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au1.oas";
+  au += "/testdata/drc/drcSimpleTests_au1.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -71,7 +71,7 @@ TEST(2)
   input += "/testdata/drc/drctest.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au2.oas";
+  au += "/testdata/drc/drcSimpleTests_au2.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -111,7 +111,7 @@ TEST(3_Flat)
   input += "/testdata/drc/drctest.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au3.oas";
+  au += "/testdata/drc/drcSimpleTests_au3.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -151,7 +151,7 @@ TEST(4_Hierarchical)
   input += "/testdata/drc/drctest.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au4.oas";
+  au += "/testdata/drc/drcSimpleTests_au4.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -191,7 +191,7 @@ TEST(5_FlatAntenna)
   input += "/testdata/drc/antenna_l1.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au5.oas";
+  au += "/testdata/drc/drcSimpleTests_au5.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -231,7 +231,7 @@ TEST(6_HierarchicalAntenna)
   input += "/testdata/drc/antenna_l1.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au6.oas";
+  au += "/testdata/drc/drcSimpleTests_au6.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -271,7 +271,7 @@ TEST(7_AntennaWithDiodes)
   input += "/testdata/drc/antenna_l1.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au7.oas";
+  au += "/testdata/drc/drcSimpleTests_au7.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 
@@ -311,7 +311,7 @@ TEST(8_TextsAndPolygons)
   input += "/testdata/drc/texts.gds";
 
   std::string au = tl::testsrc ();
-  au += "/testdata/drc/drcSimpleTests_au8.oas";
+  au += "/testdata/drc/drcSimpleTests_au8.gds";
 
   std::string output = this->tmp_file ("tmp.gds");
 

testdata/drc/drcSimpleTests_1.drc

@@ -16,6 +16,6 @@ x.is_box? == false || raise("unexpected value")
 x.output(10, 0)
 
 y = polygon_layer
-y.insert(polygon([ p(0, 0), p(0, 1.0), p(2.0, 1.0), p(2.0, 2.0), p(1.0, 2.0), p(1.0, 0) ]))
+y.insert(polygon([ p(0, 0), p(0, 1.0), p(2.0, 1.0), p(2.0, 2.0), p(3.0, 2.0), p(3.0, 0) ]))
 y.output(11, 0)
 

testdata/drc/drcSuiteTests.drc

@@ -14,12 +14,12 @@ def run_testsuite(dm, ic, tiled = false, hier = false)
 
   lb = 100
 
-  a = input(RBA::LayerInfo::new(1, 0))
-  b = input(2)
-  c = input(3)
-  x = input(10)
-  y = input(11)
-  empty = input(1000)
+  a = polygons(RBA::LayerInfo::new(1, 0))
+  b = polygons(2)
+  c = polygons(3)
+  x = polygons(10)
+  y = polygons(11)
+  empty = polygons(1000)
 
   h = {}
   layers.each { |l| h[l] = true }

testdata/ruby/dbRegionTest.rb

@@ -793,20 +793,12 @@ class DBRegion_TestClass < TestBase
   def test_15
 
     r = RBA::Region::new
-    ex = nil
-    begin
-      t = r.texts("*", true)
-    rescue => ex
-    end
-    assert_equal(ex.to_s, "Texts can only be identified on an original layer in Region::texts")
+    t = r.texts("*", true)
+    assert_equal(t.to_s, "")
 
     r.insert(RBA::Box::new(1, 2, 3, 4))
-    ex = nil
-    begin
-      t = r.texts("*", true)
-    rescue => ex
-    end
-    assert_equal(ex.to_s, "Texts can only be identified on an original layer in Region::texts")
+    t = r.texts("*", true)
+    assert_equal(t.to_s, "")
 
     ly = RBA::Layout::new
     top = ly.create_cell("TOP")