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https://issues.apache.org/jira/browse/PDFBOX-1206?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14321540#comment-14321540
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Maruan Sahyoun commented on PDFBOX-1206:
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If with the given knowledge of the Batik flaws resolving these on the existing
code is too much effort or world be a rewrite we should be able to us the
PDF.js, as it is ASL licensed, as a base for our own implementation - of course
with proper recognition - and do optimizations from there. This should also
avoid potential issues with you trying to implement something with the Sun code
in mind as you already pointed to the risk that this might be treated as a copy
of the code to some extend.
> TrueType glyphs render incorrectly
> -----------------------------------
>
> Key: PDFBOX-1206
> URL: https://issues.apache.org/jira/browse/PDFBOX-1206
> Project: PDFBox
> Issue Type: Bug
> Components: Rendering
> Affects Versions: 1.6.0, 1.7.0
> Environment: All (tested on OS X and Solaris but believe it affects
> all platforms), tested java 7 update 1 & update 2
> Reporter: Armando Singer
> Labels: convertToImage, image
> Fix For: 2.0.0
>
> Attachments: bad-text-rendering-jdk-1.8-source.pdf,
> bad-text-rendering-jdk-1.8.jpg, bauer.ttf, convertToImage.pdf,
> converttoimage.pdf-1.png, preflight.png
>
>
> 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:
> {code}
> 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]));
> }
> }
> {code}
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