[PDFBOX-1206] TrueType glyphs render incorrectly

• Type: Bug
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 1.6.0, 1.7.0, 2.0.0
• Fix Version/s: 2.0.0
• Component/s: Rendering
• Labels: convertToImage image
• Environment: All (tested on OS X and Solaris but believe it affects all platforms), tested java 7 update 1 & update 2
• Assignee: Tilman Hausherr
• Reporter: Armando Singer
• Created: 10/Jan/12 01:52
• Updated: 17/Mar/16 19:07
• Resolved: 15/Feb/15 13:07

Description

I've done a extensive testing of pdfbox under the new Java 7, update 1 & update 2 releases, and am noticing
severe image quality issues when converting a pdf to an image.

Attached is the same pdf turned converted to an image under Java 6, then again with Java 7
with the same code. The Java 7 version looks pretty bad.

This is with jdk 1.7 update 1 & 2 (for solaris x64, running headless, and OS X running Java 7 preview update 2 with default with no addition vm args to the default java command). I've also tested against
the latest code in svn (the images below are from the most current version).

The good image below is from a recent version of the jdk 1.6 (and it has always looked good
on at least jdk1.5+).

To test, I used code like this:

import java.awt.image.BufferedImage;
import java.io.File;
import java.io.IOException;
import javax.imageio.ImageIO;
import org.apache.pdfbox.pdmodel.PDDocument;
import org.apache.pdfbox.pdmodel.PDPage;

public final class PdfToImageTest {

  public static BufferedImage toBufferedImage(final String pdfFile, final int resolution)
    throws IOException {
    PDDocument document = null;
    try {
      document = PDDocument.load(pdfFile);
      final PDPage page = (PDPage) document.getDocumentCatalog().getAllPages().get(0);
      final BufferedImage result = page.convertToImage(BufferedImage.TYPE_INT_ARGB, resolution);
      return result;
    } finally {
      if (document != null) {
        document.close();
      }
    }
  }

  public static void main (String[] args) throws IOException {
    ImageIO.write(toBufferedImage(args[0], 108), "png", new File(args[1]));
  }

}

Issue Links

• is related to: BATIK-1109 svggen.font.SVGFont doesn't always calculate the correct path
• relates to: PDFBOX-1435 text is obscured by the Images