public override Primitives.VisualItem Create( Primitives.Path source )
{
Primitives.Container container = new Primitives.Container( _offset );
PathCommandVisitor visitor = new PathCommandVisitor( this );
source = _renderer.FlattenPath( source );
foreach( Primitives.Path.Command command in source.Commands )
{
command.Visit( visitor );
}
foreach( Primitives.Path path in visitor.Paths )
{
container.AddFront( path );
}
return container;
}
private GraphicsPath CreateGraphicsPath( Primitives.Path path )
{
GraphicsPath gp;
if( _mapPathToGraphicsPath.TryGetValue( path, out gp ) )
{
return gp;
}
PathCommandVisitor visitor = new PathCommandVisitor();
foreach( Primitives.Path.Command pathCommand in path.Commands )
{
pathCommand.Visit( visitor );
}
gp = visitor.GetGraphicsPath();
_mapPathToGraphicsPath.Add( path, gp );
return gp;
}
public override Primitives.Path FlattenPath( Primitives.Path source )
{
PathCommandVisitor visitor = new PathCommandVisitor();
foreach( Primitives.Path.Command pathCommand in source.Commands )
{
pathCommand.Visit( visitor );
}
using( GraphicsPath gp = visitor.GetGraphicsPath() )
{
gp.Flatten();
PointF lastPoint = PointF.Empty;
Primitives.Path path = new Primitives.Path();
path.Pen = source.Pen;
path.Brush = source.Brush;
for( int i = 0; i < gp.PointCount; ++i )
{
PointF point = gp.PathPoints[i];
byte type = gp.PathTypes[i];
PointF nextPoint = point;
if( i < gp.PointCount - 1 && gp.PathTypes[i + 1] == 1 )
{
nextPoint = gp.PathPoints[i + 1];
}
switch( type )
{
case 0:
{
path.Add( new Primitives.Path.Move( new Types.Point( point.X, point.Y ) ) );
break;
}
case 1:
{
bool first = (i == 0) || gp.PathTypes[i - 1] != 1;
bool last = (i == gp.PointCount - 1) || gp.PathTypes[i + 1] != 1;
if( first || last
|| Math.Sqrt( Math.Pow( point.X - lastPoint.X, 2 ) + Math.Pow( point.Y - lastPoint.Y, 2 ) ) > _accuracy
|| Math.Sqrt( Math.Pow( point.X - nextPoint.X, 2 ) + Math.Pow( point.Y - nextPoint.Y, 2 ) ) > _accuracy )
{
path.Add( new Primitives.Path.Line( new Types.Point( point.X, point.Y ) ) );
lastPoint = point;
}
break;
}
case 129:
{
path.Add( new Primitives.Path.Line( new Types.Point( point.X, point.Y ) ) );
path.Add( new Primitives.Path.Close() );
break;
}
default:
throw new InvalidOperationException();
}
}
return path;
}
}