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Improved non-compliant VRML1 model support by processing all top-level nodes (spec. mandates single top-level node which must be a grouping node)

This commit is contained in:
Cirilo Bernardo 2016-02-22 11:57:16 +11:00
parent 52e093087e
commit 970955d1a2
1 changed files with 6 additions and 71 deletions
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77
plugins/3d/vrml/v1/vrml1_base.cpp
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@ -146,85 +146,20 @@ bool WRL1BASE::Read( WRLPROC& proc )
// Note: according to the VRML1 specification, a file may contain
// only one grouping node at the top level. The following code
// supports non-conformant VRML1 files by processing all top level
// grouping nodes and ignoring any top-level non-grouping nodes.
// nodes as if the vrml1_base were the equivalent of a vrml1_separator
while( proc.ReadName( glob ) )
while( proc.Peek() )
{
// Process node name: only Separator, Switch and DEF are acceptable;
// WWWAnchor and LOD will not be supported
if( !glob.compare( "DEF" ) )
{
// read the name and discard it; we must not add it to the dictionary
// because that invites the possibility of a circular reference
for( int i = 0; i < 2; ++i )
{
if( !proc.ReadName( glob ) )
{
#if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
std::cerr << proc.GetError() << "\n";
#endif
return false;
}
}
}
ntype = getNodeTypeID( glob );
size_t line = 0;
size_t column = 0;
proc.GetFilePosData( line, column );
#if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 2 )
std::cerr << " * [INFO] Processing node '" << glob << "' ID: " << ntype << "\n";
#endif
if( ntype != WRL1_SEPARATOR && ntype != WRL1_SWITCH && ntype != WRL1_GROUP )
if( !ReadNode( proc, this, NULL ) )
{
#if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
std::cerr << " * [INFO] bad file - top node is not a Separator, Switch, or Group\n";
std::cerr << " * [INFO] bad file format; unexpected eof at line ";
std::cerr << line << ", column " << column << "\n";
#endif
if( !proc.DiscardNode() )
{
#if defined( DEBUG_VRML1 ) && ( DEBUG_VRML1 > 1 )
std::cerr << proc.GetError() << "\n";
std::cerr << __FILE__ << ": " << __FUNCTION__ << ": " << __LINE__ << "\n";
std::cerr << " * [INFO] could not discard node at line " << line;
std::cerr << ", column " << column << "\n";
#endif
return false;
}
continue;
return false;
}
switch( ntype )
{
case WRL1_SEPARATOR:
if( !readSeparator( proc, this, NULL ) )
return false;
break;
case WRL1_GROUP:
if( !readGroup( proc, this, NULL ) )
return false;
break;
default:
if( !readSwitch( proc, this, NULL ) )
return false;
}
}
if( !proc.eof() )