backport dwg import fixes

fec20ae  dwg import: less noisy noise reduction
3aa2d9f  dwg import: catch spline misinterpretation (fixes #20392)
1a96982  dwg import: fix handling of arc and splines in hatches
6090a93  dwg import: less noisy debugging
92e7faa  dwg/dxf import: fix angle and alignment handing of (m)texts
0f6421d  dwg import: use Q_DECLARE_TR_FUNCTIONS in QgsDwgImporter
f12cac7  dwg import: progress display
e1562a7  dwg import: support dxf encoding (fixes #15999)
b8c727f  dwg import: force polyline and hatch/ring continuity
355deb5  dwg import: fix exception (fixes #21177)
d84c34e  dwg import: support nested blocks (refs #20392)
fd15c3e  dwg import: handle wrong hatch interpretation (refs #20392)

external/libdxfrw/drw_entities.cpp

@@ -10,17 +10,29 @@
 **  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
 ******************************************************************************/
 
+// uncomment to get detailed debug output on DWG read. Caution: this option makes DWG import super-slow!
+// #define DWGDEBUG 1
+
 #include <cstdlib>
 
 #include "drw_entities.h"
 #include "intern/dxfreader.h"
 #include "intern/dwgbuffer.h"
 #include "intern/drw_dbg.h"
 
-#undef QGISDEBUG
-#include "qgslogger.h"
 #include <QStringList>
 
+#include "qgslogger.h"
+
+#ifndef DWGDEBUG
+#undef QgsDebugCall
+#undef QgsDebugMsg
+#undef QgsDebugMsgLevel
+#define QgsDebugCall
+#define QgsDebugMsg(str)
+#define QgsDebugMsgLevel(str, level)
+#endif
+
 #define RESERVE( vector, size ) try { \
     vector.reserve(size); \
   } catch(const std::exception &e) { \
@@ -436,7 +448,7 @@ bool DRW_Entity::parseDwg( DRW::Version version, dwgBuffer *buf, dwgBuffer *strB
     duint8 unk = buf->getBit();
     QgsDebugMsg( QString( "unknown bit: %1" ).arg( unk ) );
   }
-#endif
+#endif // 0
   return buf->isGood();
 }
 
@@ -1537,7 +1549,7 @@ bool DRW_LWPolyline::parseDwg( DRW::Version version, dwgBuffer *buf, duint32 bs
 #if 0
         if ( vertlist.size() < i )
           vertlist.at( i )->vertexId = vertexId;
-#endif
+#endif // 0
       }
     }
     //add widths
@@ -1592,7 +1604,7 @@ void DRW_Text::parseCode( int code, dxfReader *reader )
       angle = reader->getDouble() / ARAD;
       break;
     case 51:
-      oblique = reader->getDouble();
+      oblique = reader->getDouble() / ARAD;
       break;
     case 71:
       textgen = reader->getInt32();
@@ -1789,6 +1801,7 @@ bool DRW_MText::parseDwg( DRW::Version version, dwgBuffer *buf, duint32 bs )
 
   extPoint = buf->get3BitDouble(); /* Extrusion 3BD 210 Undocumented; */
   secPoint = buf->get3BitDouble(); /* X-axis dir 3BD 11 */
+  haveXAxis = true;
   updateAngle();
   widthscale = buf->getBitDouble(); /* Rect width BD 41 */
   if ( version > DRW::AC1018 )  //2007+
@@ -2178,7 +2191,7 @@ void DRW_Hatch::parseCode( int code, dxfReader *reader )
       else if ( ellipse ) ellipse->endparam = reader->getDouble() / ARAD;
       break;
     case 52:
-      angle = reader->getDouble();
+      angle = reader->getDouble() / ARAD;
       break;
     case 73:
       if ( arc ) arc->isccw = reader->getInt32();
@@ -2320,7 +2333,7 @@ bool DRW_Hatch::parseDwg( DRW::Version version, dwgBuffer *buf, duint32 bs )
 
       QgsDebugMsg( QString( "segs: %1" ).arg( numPathSeg ) );
 
-      for ( dint32 j = 0; j < numPathSeg; ++j )
+      for ( dint32 j = 0; j < numPathSeg && buf->isGood(); ++j )
       {
         duint8 typePath = buf->getRawChar8();
         QgsDebugMsg( QString( "  typepath: %1" ).arg( typePath ) );
@@ -2364,15 +2377,26 @@ bool DRW_Hatch::parseDwg( DRW::Version version, dwgBuffer *buf, duint32 bs )
                        .arg( spline->nknots ).arg( spline->ncontrol )
                      );
           RESERVE( spline->knotslist, spline->nknots );
-          for ( dint32 j = 0; j < spline->nknots; ++j )
+          dint32 j;
+          for ( j = 0; j < spline->nknots && buf->isGood(); ++j )
           {
             spline->knotslist.push_back( buf->getBitDouble() );
             QgsDebugMsg( QString( "  knot %1: %2" ).arg( j )
                          .arg( spline->knotslist.back() )
                        );
           }
+
+          if ( !buf->isGood() )
+          {
+            QgsDebugMsg( QStringLiteral( "NOT GOOD at %1!  degree:%2 flags:0x%3 nknots:%4 ncontrol:%5" )
+                         .arg( j )
+                         .arg( spline->degree ).arg( spline->flags, 0, 16 )
+                         .arg( spline->nknots ).arg( spline->ncontrol )
+                       );
+          }
+
           RESERVE( spline->controllist, spline->ncontrol );
-          for ( dint32 j = 0; j < spline->ncontrol && buf->isGood(); ++j )
+          for ( j = 0; j < spline->ncontrol && buf->isGood(); ++j )
           {
             DRW_Coord *crd = new DRW_Coord( buf->get2RawDouble() );
             spline->controllist.push_back( crd );
@@ -2933,10 +2957,10 @@ void DRW_Dimension::parseCode( int code, dxfReader *reader )
       rot = reader->getDouble();
       break;
     case 50:
-      angle = reader->getDouble();
+      angle = reader->getDouble() / ARAD;
       break;
     case 52:
-      oblique = reader->getDouble();
+      oblique = reader->getDouble() / ARAD;
       break;
     case 40:
       length = reader->getDouble();

external/libdxfrw/drw_header.cpp

@@ -10,17 +10,30 @@
 **  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
 ******************************************************************************/
 
+// uncomment to get detailed debug output on DWG read. Caution: this option makes DWG import super-slow!
+// #define DWGDEBUG 1
+
 #include "drw_header.h"
 #include "intern/dxfreader.h"
 #include "intern/dxfwriter.h"
 #include "intern/drw_dbg.h"
 #include "intern/dwgbuffer.h"
 
-#include "qgslogger.h"
 #include <QStringList>
 
 #include <cassert>
 
+#include "qgslogger.h"
+
+#ifndef DWGDEBUG
+#undef QgsDebugCall
+#undef QgsDebugMsg
+#undef QgsDebugMsgLevel
+#define QgsDebugCall
+#define QgsDebugMsg(str)
+#define QgsDebugMsgLevel(str, level)
+#endif
+
 DRW_Header::DRW_Header()
   : curr( nullptr )
   , version( DRW::AC1021 )

external/libdxfrw/drw_objects.cpp

@@ -10,6 +10,9 @@
 **  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
 ******************************************************************************/
 
+// uncomment to get detailed debug output on DWG read. Caution: this option makes DWG import super-slow!
+// #define DWGDEBUG 1
+
 #include <iostream>
 #include <cmath>
 
@@ -20,10 +23,19 @@
 #include "intern/drw_dbg.h"
 #include "intern/dwgutil.h"
 
-#undef QGISDEBUG
-#include "qgslogger.h"
 #include <QStringList>
 
+#include "qgslogger.h"
+
+#ifndef DWGDEBUG
+#undef QgsDebugCall
+#undef QgsDebugMsg
+#undef QgsDebugMsgLevel
+#define QgsDebugCall
+#define QgsDebugMsg(str)
+#define QgsDebugMsgLevel(str, level)
+#endif
+
 #define RESERVE( vector, size ) try { \
     vector.reserve(size); \
   } catch(const std::exception &e) { \

external/libdxfrw/intern/drw_textcodec.cpp

@@ -296,7 +296,8 @@ std::string DRW_Converter::encodeNum( int c )
   return std::string( ( char * )ret );
 }
 
-/** 's' is a string with at least 4 bytes length
+/**
+ * 's' is a string with at least 4 bytes length
 ** returned 'b' is byte length of encoded char: 2,3 or 4
 **/
 int DRW_Converter::decodeNum( std::string s, int *b )

external/libdxfrw/intern/dwgbuffer.cpp

@@ -10,34 +10,23 @@
 **  along with this program.  If not, see <http://www.gnu.org/licenses/>.    **
 ******************************************************************************/
 
+// uncomment to get detailed debug output on DWG read. Caution: this option makes DWG import super-slow!
+// #define DWGDEBUG 1
 
 #include "dwgbuffer.h"
 #include "../libdwgr.h"
 #include "drw_textcodec.h"
 #include "drw_dbg.h"
 
-#undef QGISDEBUG
 #include "qgslogger.h"
 
-#if 0
-//#include <bitset>
-#include <fstream>
-#include <algorithm>
-#include <sstream>
-#include "dwgreader.h"
-#include "dxfwriter.h"
-
-#define FIRSTHANDLE 48
-
-enum sections
-{
-  secUnknown,
-  secHeader,
-  secTables,
-  secBlocks,
-  secEntities,
-  secObjects
-};
+#ifndef DWGDEBUG
+#undef QgsDebugCall
+#undef QgsDebugMsg
+#undef QgsDebugMsgLevel
+#define QgsDebugCall
+#define QgsDebugMsg(str)
+#define QgsDebugMsgLevel(str, level)
 #endif
 
 static unsigned int crctable[256] =
@@ -711,7 +700,8 @@ std::string dwgBuffer::getCP8Text()
 
 //TU unicode 16 bit (UCS) text converted to utf8
 
-/** Reads 2-bytes char (UCS2, nullptr terminated) and convert to std::string (only for Latin-1)
+/**
+ * Reads 2-bytes char (UCS2, nullptr terminated) and convert to std::string (only for Latin-1)
    ts= total input size in bytes.
 **/
 std::string dwgBuffer::getUCSStr( duint16 ts )
@@ -919,31 +909,31 @@ duint32 dwgBuffer::getEnColor( DRW::Version v, int &rgb, int &transparency )
   transparency = 0;
 
   duint16 idx = getBitShort();
-  QgsDebugMsg( QString( "idx reads COLOR: 0x%1" ).arg( idx, 0, 16 ) );
+  QgsDebugMsgLevel( QString( "idx reads COLOR: 0x%1" ).arg( idx, 0, 16 ), 4 );
 
   duint16 flags = idx >> 8;
 
   idx = idx & 0x1FF; //RLZ: warning this is correct?
 
-  QgsDebugMsg( QString( "flag COLOR:0x%1, index COLOR:0x%2" ).arg( flags, 0, 16 ).arg( idx, 0, 16 ) );
+  QgsDebugMsgLevel( QString( "flag COLOR:0x%1, index COLOR:0x%2" ).arg( flags, 0, 16 ).arg( idx, 0, 16 ), 4 );
 
   if ( flags & 0x80 )
   {
     // complex color (rgb)
     rgb = getBitLong() & 0xffffff;
 
-    QgsDebugMsg( QString( "RGB COLOR:0x%1" ).arg( rgb, 0, 16 ) );
+    QgsDebugMsgLevel( QString( "RGB COLOR:0x%1" ).arg( rgb, 0, 16 ), 4 );
 
     if ( flags & 0x80 )
     {
-      QgsDebugMsg( "acdbColor COLOR are present" );
+      QgsDebugMsgLevel( "acdbColor COLOR are present", 4 );
     }
   }
 
   if ( flags & 0x20 )
   {
     transparency = getBitLong();
-    QgsDebugMsg( QString( "Transparency COLOR:0x%1" ).arg( transparency, 0, 16 ) );
+    QgsDebugMsgLevel( QString( "Transparency COLOR:0x%1" ).arg( transparency, 0, 16 ), 4 );
   }
 
   return idx; //default return ByLayer