[jira] [Created] (PDFBOX-1960) Matrix is wrong

["John Hewson (JIRA)" <ji...@apache.org>]

John Hewson created PDFBOX-1960:
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             Summary: Matrix is wrong
                 Key: PDFBOX-1960
                 URL: https://issues.apache.org/jira/browse/PDFBOX-1960
             Project: PDFBox
          Issue Type: Bug
            Reporter: John Hewson
            Priority: Critical


I've been driven insane recently by trying to get pattern fills to render correctly. Patterns have their own matrix which is concatenated to the CTM and no matter how I applied the transformation, the results were wrong.

It turns out that {{org.apache.pdfbox.util.Matrix}} is not behaving as expected, here's an example from a pattern I'm working on. I performed the same concatenation (i.e. multiplication) using our Matrix and Java's AffineTransform, the results are as follows:

Java: AffineTransform[[2.0, 0.0, 1.251E-12], [-0.0, 2.0, 1684.0]] *
AffineTransform[[0.6, 0.0, 302.6], [0.0, 0.6, 1091.38]] =
[[0.600014,0.0,0.0][0.0,0.6,0.0][605.21,2856.34,1.0]]

PDFBox: [[2.0,-0.0,0.0][0.0,2.0,0.0][1.2505552E-12,1684.0,1.0]] * [[0.3,0.0,0.0][0.0,0.300007,0.0][302.60,586.17,1.0]] = [[0.6,0.0,0.0][0.0,0.6,0.0][302.608,1091.38,1.0]]

I suggest that we remove Matrix and replace it with AffineTransform.



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