THPDFJBIG2Decoder.LastSegmentGraphValidationInfo Property

Keeps hold of the JBIG2 segment-graph validation report from the most recent decode so callers can inspect why a stream passed or failed before the decoded scanlines are put to use

Declaration

Property LastSegmentGraphValidationInfo: TJBIG2SegmentGraphValidationInfo Read FLastSegmentGraphValidationInfo;

Unit

HPDFJBIG2

Parameters

Return value

Returns the current last segment graph validation info value

Usage notes

• Read this property after LoadFromByteArray or LoadRegionFromByteArray to obtain the same TJBIG2SegmentGraphValidationInfo record the standalone HPDFValidateJBIG2SegmentGraph routine produces
• The record is reset to jbgvsNotChecked at the start of every decode, and an empty image payload records jbgvsEmptyStream with FailureStreamKind set to jbsskImage
• Status holds a TJBIG2SegmentGraphValidationStatus value, whilst segment and reference counts, declared new symbols, maximum dependency depth and the first-failure offsets identify the exact cause
• See JBIG2 Segment-Graph Validation for the fail-closed conditions and the budget fields of TJBIG2SegmentGraphValidationOptions

Related APIs

• THPDFJBIG2Decoder
• THPDFJBIG2Decoder.LoadFromByteArray Method
• THPDFJBIG2Decoder.LoadRegionFromByteArray Method
• JBIG2 Segment-Graph Validation
• Contents