/// <summary>
/// Renders a graph to a data stream
/// </summary>
/// <param name="gvContext">A GraphViz context pointer</param>
/// <param name="gvGraph">A GraphViz graph pointer</param>
/// <param name="format">The GraphViz renderer format string</param>
/// <returns>The stream representing the rendered graph</returns>
protected static GraphVizRenderStream Render(IntPtr gvContext, IntPtr gvGraph, string format)
{
unsafe
{
byte *result;
uint length;
// Render the graph to a byte stream
if (GraphVizCore.gvRenderData(gvContext, gvGraph, format, out result, out length) != 0)
{
throw new InvalidDataException("GraphViz gvRenderData function return empty pointer");
}
// Turn the byte stream to a "managed" stream
return(new GraphVizRenderStream(result, length));
}
}
