[jira] [Commented] (PDFBOX-4627) Wrong color of uncolored tiling pattern

["Jiri Kunhart (Jira)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/PDFBOX-4627?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16920702#comment-16920702 ] 

Jiri Kunhart commented on PDFBOX-4627:
--------------------------------------

[~tilman] According to the last Michael's comment it would be worth to fix it. I think it is matter of time when other pdfbox user has the same problem (if we consider that Amyuni PDF Converter is well know pdf converter and is very often used and maybe other pdf converters would generate the same problematic pdf file).

> Wrong color of uncolored tiling pattern
> ---------------------------------------
>
>                 Key: PDFBOX-4627
>                 URL: https://issues.apache.org/jira/browse/PDFBOX-4627
>             Project: PDFBox
>          Issue Type: Bug
>          Components: Rendering
>    Affects Versions: 2.0.16
>            Reporter: Jiri Kunhart
>            Priority: Major
>         Attachments: after_fix.png, before_fix.png, uncolored_tiling_pattern.patch, uncolored_tiling_pattern.pdf
>
>
> The attached pdf file with uncolored tiling pattern is rendered wrongly (see "before_fix.png"). The problem is that pattern stream contains
> /DevGrayCS cs
> which overwrites PDPattern color space stored in PDGraphicsState#nonStrokingColor. I did a small fix which ignores all settings of color space inside of uncolored tiling pattern stream and the result seems to be good (see "after_fix.png").
> Note: the pattern in the png file looks diferently than in the original pdf file, but this should be handled probably in the other issue.



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