private void HandleReferedToSegmentNumbers(SegmentHeader segmentHeader)
{
int referredToSegmentCount = segmentHeader.GetReferredToSegmentCount();
int[] referredToSegments = new int[referredToSegmentCount];
int segmentNumber = segmentHeader.GetSegmentNumber();
if (segmentNumber <= 256)
{
for (int i = 0; i < referredToSegmentCount; i++)
{
referredToSegments[i] = reader.Readbyte();
}
}
else if (segmentNumber <= 65536)
{
short[] buf = new short[2];
for (int i = 0; i < referredToSegmentCount; i++)
{
reader.Readbyte(buf);
referredToSegments[i] = BinaryOperation.GetInt16(buf);
}
}
else
{
short[] buf = new short[4];
for (int i = 0; i < referredToSegmentCount; i++)
{
reader.Readbyte(buf);
referredToSegments[i] = BinaryOperation.GetInt32(buf);
}
}
segmentHeader.SetReferredToSegments(referredToSegments);
if (JBIG2StreamDecoder.debug)
{
Console.WriteLine("referredToSegments = ");
for (int i = 0; i < referredToSegments.Length; i++)
{
Console.WriteLine(referredToSegments[i] + " ");
}
Console.WriteLine("");
}
}
private void ReadSegments()
{
bool finished = false;
while (!reader.IsFinished() && !finished)
{
SegmentHeader segmentHeader = new SegmentHeader();
ReadSegmentHeader(segmentHeader);
// read the Segment data
Segment segment = null;
int segmentType = segmentHeader.GetSegmentType();
int[] referredToSegments = segmentHeader.GetReferredToSegments();
int noOfReferredToSegments = segmentHeader.GetReferredToSegmentCount();
switch (segmentType)
{
case Segment.SYMBOL_DICTIONARY:
segment = new SymbolDictionarySegment(this);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_TEXT_REGION:
segment = new TextRegionSegment(this, false);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_TEXT_REGION:
segment = new TextRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_TEXT_REGION:
segment = new TextRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.PATTERN_DICTIONARY:
segment = new PatternDictionarySegment(this);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, false);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_HALFTONE_REGION:
segment = new HalftoneRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_GENERIC_REGION:
segment = new GenericRegionSegment(this, false);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_GENERIC_REGION:
segment = new GenericRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_GENERIC_REGION:
segment = new GenericRegionSegment(this, true);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.INTERMEDIATE_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, false, referredToSegments, noOfReferredToSegments);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, true, referredToSegments, noOfReferredToSegments);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.IMMEDIATE_LOSSLESS_GENERIC_REFINEMENT_REGION:
segment = new RefinementRegionSegment(this, true, referredToSegments, noOfReferredToSegments);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.PAGE_INFORMATION:
segment = new PageInformationSegment(this);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.END_OF_PAGE:
continue;
case Segment.END_OF_STRIPE:
segment = new EndOfStripeSegment(this);
segment.SetSegmentHeader(segmentHeader);
break;
case Segment.END_OF_FILE:
finished = true;
continue;
case Segment.PROFILES:
break;
case Segment.TABLES:
break;
case Segment.EXTENSION:
segment = new ExtensionSegment(this);
segment.SetSegmentHeader(segmentHeader);
break;
default:
break;
}
if (!randomAccessOrganisation)
{
segment.ReadSegment();
}
segments.Add(segment);
}
if (randomAccessOrganisation)
{
foreach (Segment segment in segments)
{
segment.ReadSegment();
}
}
}