1 pixel difference in Y axis

[gastendonk]

We have switched from Java 8 to 17. Now there's a difference of (I guess) 1 pixel in Y axis. Is there already a solution for this to ignore this difference?

jasperreports:6.4.3

[gastendonk]

This is the cause of the problem and there will be no fix for it: https://bugs.openjdk.org/browse/JDK-8215290

So that the transition from Java 8 to Java 17 still works, I modified the jasperPrint object before the PDF file is created and pdfcompare is executed.

The leadingOffset values of the JRTemplatePrintText class differ for a JasperReport created with Java 8 and one with Java 17.

private void fake(JasperPrint jasperPrint) {
    for (JRPrintPage page : jasperPrint.getPages()) {
        fake2(page.getElements());
    }
}
private void fake2(List<JRPrintElement> list) {
    for (JRPrintElement e : list) {
        if (e instanceof JRTemplatePrintText) {
            JRTemplatePrintText text = (JRTemplatePrintText) e;
            // The values have to be adjusted.
            if (text.getLeadingOffset() == -1.9072266f) {
                text.setLeadingOffset(-1.7600098f);
            } else if (text.getLeadingOffset() == -1.6953125f) {
                text.setLeadingOffset(-1.5644531f);
            } else if (text.getLeadingOffset() == -2.5429688f) {
                text.setLeadingOffset(-2.3466797f);
            } else if (text.getLeadingOffset() == -2.1191406f) {
                text.setLeadingOffset(-1.9555664f);
            } else if (text.getLeadingOffset() != 0f) {
                System.out.println("<> " + text.getLeadingOffset());
            }
        } else if (e instanceof JRPrintFrame) {
            fake2(((JRPrintFrame) e).getElements()); // recursive
        }
    }
}

[finsterwalder]

This is not a problem in PdfCompare, is it? It's more a problem that you compare PDF documents generated with different Java versions? So your system, after upgrading Java produces slightly different documents due to slight changes in font metrics, right?

[gastendonk]

formula for getting the new value: text.getLeadingOffset() / 1.08364544334f