private Bitmap getSymbol(Symbol2D symbol2D)
{
if (symbol2D == null)
{
return(null);
}
SymbolLookupKey key = new SymbolLookupKey(symbol2D.GetHashCode());
Bitmap symbol;
_symbolCache.TryGetValue(key, out symbol);
if (symbol == null)
{
MemoryStream data = new MemoryStream();
symbol2D.SymbolData.Position = 0;
using (BinaryReader reader = new BinaryReader(new NondisposingStream(symbol2D.SymbolData)))
{
data.Write(reader.ReadBytes((Int32)symbol2D.SymbolData.Length), 0, (Int32)symbol2D.SymbolData.Length);
}
symbol = new Bitmap(data);
_symbolCache[key] = symbol;
}
return(symbol);
}
private Bitmap getSymbol(Symbol2D symbol2D)
{
if (symbol2D == null)
{
return null;
}
SymbolLookupKey key = new SymbolLookupKey(symbol2D.GetHashCode());
Bitmap symbol;
_symbolCache.TryGetValue(key, out symbol);
if (symbol == null)
{
lock (symbol2D)
{
MemoryStream data = new MemoryStream();
symbol2D.SymbolData.Position = 0;
using (BinaryReader reader = new BinaryReader(new NondisposingStream(symbol2D.SymbolData)))
{
data.Write(reader.ReadBytes((Int32) symbol2D.SymbolData.Length), 0,
(Int32) symbol2D.SymbolData.Length);
}
symbol = new Bitmap(data);
if (symbol.PixelFormat != PixelFormat.Undefined)
{
_symbolCache[key] = symbol;
}
else
{
symbol = null;
}
}
}
return symbol ?? getSymbol(symbol2D);
}
