public DjvuPageInfo(DjvuDocumentInfo docInfo, int pageNumber)
{
if (docInfo == null)
{
throw new ArgumentNullException(nameof(docInfo));
}
if ((_Info = docInfo.GetPageInfo(pageNumber)) == null)
{
throw new ArgumentException(
$"{nameof(DjvuDocumentInfo)} object {nameof(docInfo)} is not fully initialized.",
nameof(docInfo));
}
if (pageNumber < 0 || pageNumber >= docInfo.PageCount)
{
throw new ArgumentOutOfRangeException(nameof(pageNumber));
}
_DocumentInfo = docInfo;
Number = pageNumber;
Page = NativeMethods.GetDjvuDocumentPage(_DocumentInfo.Document, pageNumber);
DjvuJobStatus status = DjvuJobStatus.NotStarted;
List <object> messagesList = new List <object>();
while (true)
{
status = NativeMethods.GetDjvuJobStatus(Page);
if ((int)status >= 2)
{
break;
}
else
{
messagesList.AddRange(DjvuDocumentInfo.ProcessMessage(docInfo.Context, true));
}
}
if (status == DjvuJobStatus.Failed)
{
throw new ApplicationException($"Failed to parse document page: {pageNumber}");
}
else if (status == DjvuJobStatus.Stopped)
{
throw new ApplicationException(
$"Parsing of DjVu document page interrupted by user. Page number: {pageNumber}");
}
if (_Info != null)
{
Width = _Info.Width;
Height = _Info.Height;
Dpi = _Info.Dpi;
Version = _Info.Version;
Rotation = _Info.Rotation;
}
PageType = NativeMethods.GetDjvuPageType(Page);
}
public static DjvuDocumentInfo CreateDjvuDocumentInfo(string filePath)
{
if (filePath == null)
{
throw new ArgumentNullException(nameof(filePath));
}
if (string.IsNullOrWhiteSpace(filePath))
{
throw new ArgumentException(nameof(filePath));
}
if (!File.Exists(filePath))
{
throw new FileNotFoundException($"File was not found - path: {filePath}");
}
Process proc = Process.GetCurrentProcess();
string fileName = System.IO.Path.GetFileNameWithoutExtension(filePath);
string programName = $"{proc.ProcessName}:{proc.Id:0000#}:{fileName}:{DateTime.UtcNow}";
IntPtr context = IntPtr.Zero;
IntPtr document = IntPtr.Zero;
try
{
context = NativeMethods.CreateDjvuContext(programName);
if (context == IntPtr.Zero)
{
throw new ApplicationException("Failed to create native ddjvu_context object");
}
document = NativeMethods.LoadDjvuDocument(context, filePath, 1);
if (document == IntPtr.Zero)
{
throw new ApplicationException($"Failed to open native djvu_document: {filePath}");
}
DjvuJobStatus status = DjvuJobStatus.NotStarted;
while (true)
{
status = NativeMethods.GetDjvuJobStatus(document);
if ((int)status >= 2)
{
break;
}
else
{
ProcessMessage(context, true);
}
}
if (status == DjvuJobStatus.OK)
{
return(new DjvuDocumentInfo(context, document, filePath));
}
else if (status == DjvuJobStatus.Failed)
{
throw new ApplicationException($"Failed to parse document: {filePath}");
}
else if (status == DjvuJobStatus.Stopped)
{
throw new ApplicationException(
$"Parsing of DjVu document interrupted by user. Document path: {filePath}");
}
throw new ApplicationException($"Unknown error: \"{status}\" while processing document: {filePath}");
}
catch (Exception error)
{
if (document != IntPtr.Zero)
{
NativeMethods.ReleaseDjvuDocument(document);
document = IntPtr.Zero;
}
if (context != IntPtr.Zero)
{
NativeMethods.ReleaseDjvuContext(context);
context = IntPtr.Zero;
}
throw new AggregateException($"Failed to create DjvuDocumenyInfo from file {filePath}", error);
}
}
