#2 Transparency stripping and misleading errors

closed-fixed
nobody
None
5
2008-03-18
2008-03-05
Anonymous
No

It seems that pngstrip (and thus opt-png) strips some transparency, even if not asked. For example, try to opt-png the attached image.

Also, in opt-png.in the error messages on lines 74 and 84 are seemingly mixed up.

Discussion

  • Nobody/Anonymous

    Test image for pngstripping

     
  • Brian Lindholm

    Brian Lindholm - 2008-03-17

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    Bug confirmed. Error messages in opt-png.in are swapped and will be fixed with 1.0.20.

    Unwanted transparency stripping happens when the tRNS chuck is used, but not when full alpha channels are used. A tentative bug fix has been identified and is being tested.

     
  • Brian Lindholm

    Brian Lindholm - 2008-03-18
    • status: open --> closed-fixed
     
  • Brian Lindholm

    Brian Lindholm - 2008-03-18

    Logged In: YES
    user_id=1006823
    Originator: NO

    The recently-released littleutils 1.0.20 fixes both the unwanted transparency stripping of pngstrip and the confusing error messages in opt-png.in.

     

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