/// <summary>
/// Extracts text fragments from the 2nd page and highlights the glyphs in the fragment.
/// </summary>
/// <param name="document"></param>
private static void ExtractTextAndHighlightGlyphs(PdfFixedDocument document)
{
PdfRgbColor penColor = new PdfRgbColor();
PdfPen pen = new PdfPen(penColor, 0.5);
Random rnd = new Random();
byte[] rgb = new byte[3];
PdfContentExtractor ce = new PdfContentExtractor(document.Pages[1]);
PdfTextFragmentCollection tfc = ce.ExtractTextFragments();
PdfTextFragment tf = tfc[1];
for (int i = 0; i < tf.Glyphs.Count; i++)
{
rnd.NextBytes(rgb);
penColor.R = rgb[0];
penColor.G = rgb[1];
penColor.B = rgb[2];
PdfPath boundingPath = new PdfPath();
boundingPath.StartSubpath(tf.Glyphs[i].GlyphCorners[0].X, tf.Glyphs[i].GlyphCorners[0].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[1].X, tf.Glyphs[i].GlyphCorners[1].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[2].X, tf.Glyphs[i].GlyphCorners[2].Y);
boundingPath.AddLineTo(tf.Glyphs[i].GlyphCorners[3].X, tf.Glyphs[i].GlyphCorners[3].Y);
boundingPath.CloseSubpath();
document.Pages[1].Graphics.DrawPath(pen, boundingPath);
}
}
private static void HighlightSearchResults(PdfPage page, PdfTextSearchResultCollection searchResults, PdfColor color)
{
PdfPen pen = new PdfPen(color, 0.5);
for (int i = 0; i < searchResults.Count; i++)
{
PdfTextFragmentCollection tfc = searchResults[i].TextFragments;
for (int j = 0; j < tfc.Count; j++)
{
PdfPath path = new PdfPath();
path.StartSubpath(tfc[j].FragmentCorners[0].X, tfc[j].FragmentCorners[0].Y);
path.AddPolygon(tfc[j].FragmentCorners);
page.Graphics.DrawPath(pen, path);
}
}
}