THPDFJpegReducedDecodeStatus

THPDFJpegReducedDecodeStatus =
  (jrdsCompleted, jrdsCancelled, jrdsFailed);

• jrdsCompleted means the exact target bitmap is ready for use
• jrdsCancelled means the cancellation callback stopped decoding between scanlines
• jrdsFailed means validation or native decoding failed and ErrorMessage contains a diagnostic

See THPDFJpegReducedDecoder.Decode