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Posted to dev@cocoon.apache.org by "Nikolas List (JIRA)" <ji...@apache.org> on 2009/08/26 12:11:59 UTC

[jira] Created: (COCOON-2266) Result of RotateOperation/MirrorOperation is a black image

Result of RotateOperation/MirrorOperation is a black image
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                 Key: COCOON-2266
                 URL: https://issues.apache.org/jira/browse/COCOON-2266
             Project: Cocoon
          Issue Type: Bug
          Components: Blocks: ImageOp
    Affects Versions: 2.2, 2.2-dev (Current SVN)
            Reporter: Nikolas List
            Priority: Trivial


As already mentioned in the cocoon-imageop-samples the RotateOperation and MirrorOperation don't work satisfactorily.

The reason is that the resulting pixel have negative coordinates and are therefore not drawn.

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[jira] Updated: (COCOON-2266) Result of RotateOperation/MirrorOperation is a black image

Posted by "Nikolas List (JIRA)" <ji...@apache.org>.

     [ https://issues.apache.org/jira/browse/COCOON-2266?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Nikolas List updated COCOON-2266:
---------------------------------

    Attachment: imageop.patch

The following patch (partially) solves the two problems.

Two drawbacks for the solution of RotateOperation:
 1) Will enlarge image for all angles not in 0, 90, 180, 270 (should probably be controlled by allow-enlarge param ?)
 2) Background is always black


> Result of RotateOperation/MirrorOperation is a black image
> ----------------------------------------------------------
>
>                 Key: COCOON-2266
>                 URL: https://issues.apache.org/jira/browse/COCOON-2266
>             Project: Cocoon
>          Issue Type: Bug
>          Components: Blocks: ImageOp
>    Affects Versions: 2.2, 2.2-dev (Current SVN)
>            Reporter: Nikolas List
>            Priority: Trivial
>         Attachments: imageop.patch
>
>
> As already mentioned in the cocoon-imageop-samples the RotateOperation and MirrorOperation don't work satisfactorily.
> The reason is that the resulting pixel have negative coordinates and are therefore not drawn.

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