/// <summary>
/// Save to PDF
/// </summary>
/// <param name="stream">Strema to write to</param>
public void SaveToPdf(Stream stream)
{
//NativeMethods.cairo_select_font_face(_rsvgHandle, "serif", 0, 0);
NativeMethods.RsvgDimensionData dim = new NativeMethods.RsvgDimensionData();
NativeMethods.rsvg_handle_get_dimensions(_rsvgHandle, ref dim);
CairoWriteFunction cwf = new CairoWriteFunction(WriteToPDF);
GCHandle handle1 = GCHandle.Alloc(stream);
IntPtr parameter = (IntPtr)handle1;
IntPtr surface = NativeMethods.cairo_pdf_surface_create_for_stream(cwf, parameter, dim.width, dim.height);
IntPtr cairo = NativeMethods.cairo_create(surface);
NativeMethods.rsvg_handle_render_cairo(_rsvgHandle, cairo);
int status = NativeMethods.cairo_status(cairo);
if (status > 0)
{
IntPtr s = NativeMethods.cairo_status_to_string(status);
string ret = Marshal.PtrToStringAnsi(s);
throw new Exception(ret);
}
NativeMethods.cairo_destroy(cairo);
NativeMethods.cairo_surface_destroy(surface);
}
internal static extern IntPtr cairo_pdf_surface_create_for_stream([MarshalAs(UnmanagedType.FunctionPtr)] CairoWriteFunction write_func, IntPtr closure, double width_in_points, double height_in_points);
