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Reduce memory allocation in DocstrumBoundingBoxes

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This commit is contained in:
BobLd
2024-06-24 12:15:20 +01:00
parent dc933aede9
commit 14e7024545
1 changed files with 26 additions and 10 deletions
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36
src/UglyToad.PdfPig.DocumentLayoutAnalysis/PageSegmenter/DocstrumBoundingBoxes.cs
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@@ -405,6 +405,27 @@
}
}
private sealed class PdfPointXYComparer : IComparer<PdfPoint>
{
public static readonly PdfPointXYComparer Instance = new();
public int Compare(PdfPoint p1, PdfPoint p2)
{
int comp = p1.X.CompareTo(p2.X);
return comp == 0 ? p1.Y.CompareTo(p2.Y) : comp;
}
}
private sealed class PdfPointYComparer : IComparer<PdfPoint>
{
public static readonly PdfPointYComparer Instance = new();
public int Compare(PdfPoint p1, PdfPoint p2)
{
return p1.Y.CompareTo(p2.Y);
}
}
/// <summary>
/// Get the structural blocking parameters.
/// </summary>
@@ -446,28 +467,23 @@
}
// Get middle points
var ps = new[] { j.Point1, j.Point2, Aj.Value, Bj.Value };
PdfPoint[] ps = [j.Point1, j.Point2, Aj.Value, Bj.Value];
if (dXj != 0)
{
ps = ps.OrderBy(p => p.X).ThenBy(p => p.Y).ToArray();
Array.Sort(ps, PdfPointXYComparer.Instance);
}
else if (dYj != 0)
{
ps = ps.OrderBy(p => p.Y).ToArray();
Array.Sort(ps, PdfPointYComparer.Instance);
}
PdfPoint Cj = ps[1];
PdfPoint Dj = ps[2];
bool overlap = true;
// Cj and Dj should be contained within both j and [Aj,Bj] if overlapped
if (!PointInLine(j.Point1, j.Point2, Cj) || !PointInLine(j.Point1, j.Point2, Dj) ||
!PointInLine(Aj.Value, Bj.Value, Cj) || !PointInLine(Aj.Value, Bj.Value, Dj))
{
// nonoverlapped
overlap = false;
}
bool overlap = !(!PointInLine(j.Point1, j.Point2, Cj) || !PointInLine(j.Point1, j.Point2, Dj) ||
!PointInLine(Aj.Value, Bj.Value, Cj) || !PointInLine(Aj.Value, Bj.Value, Dj));
double pj = Distances.Euclidean(Cj, Dj);