public string GetDocumentAnnotation()
{
IntPtr miniexp = IntPtr.Zero;
try
{
miniexp = NativeMethods.GetDjvuDocumentAnnotation(Document, 1);
if (miniexp != IntPtr.Zero)
{
// TODO - improve data extraction from miniexp - only part is recovered now
string result = DjvuPageInfo.ExtractTextFromMiniexp(Document, miniexp);
if (result == null)
{
return(string.Empty);
}
else
{
return(result);
}
}
return(null);
}
finally
{
if (miniexp != IntPtr.Zero)
{
NativeMethods.ReleaseDjvuMiniexp(Document, miniexp);
}
}
}
public RenderEngine(DjvuPageInfo page)
{
if (page == null)
{
throw new ArgumentNullException(nameof(page));
}
if (page.Page == IntPtr.Zero)
{
throw new ArgumentException("Invalid native Page pointer.", nameof(page));
}
_Page = page;
_PageNative = page.Page;
}