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Posted to dev@pdfbox.apache.org by "Tilman Hausherr (JIRA)" <ji...@apache.org> on 2018/01/09 18:58:00 UTC

[jira] [Created] (PDFBOX-4060) Slow rendering of PDF file with DeviceN jpeg file

Tilman Hausherr created PDFBOX-4060:
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             Summary: Slow rendering of PDF file with DeviceN jpeg file
                 Key: PDFBOX-4060
                 URL: https://issues.apache.org/jira/browse/PDFBOX-4060
             Project: PDFBox
          Issue Type: Bug
          Components: Rendering
    Affects Versions: 2.0.8
            Reporter: Tilman Hausherr


(File submitted by Soon Keong Tan on the user mailing list)

There is a large jpeg file (5349 x 3806) that uses a DeviceN colorspace which in turn is based on CMYK. There's some slowness due to the type0 convert function from DeviceN to CMYK, but this is less than 10%. Most time is from converting the CMYK to RGB, one pixel at a time. (Because of the DeviceN colorspace we can't use bulk conversion, which may or may not be faster)



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