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#45 Add an option to toggle pre-multiplied alpha

1.3.0
closed
None
5
2019-06-03
2015-01-03
No

Discussion

  • Timothée Giet

    Timothée Giet - 2015-02-13

    That's one of the first thing I've been looking for. Looking forward to it :)

     
  • Bret Karson

    Bret Karson - 2018-06-21

    Why hasn't this been implemented or even planned to become part of dvj_view after all these years?

    For example, 3ds max got ancient bugs that can create erroneous half-transparent pixels when rendering to a premultiplied image in certain formats, hence why I always render out straight images I intend for compositing.

    But previewing such straight images in dvj_view will always look terrible as dvj_view so far cannot toggle between premultiplied and straight alpha modes.

    It's a highly useful and needed feature.

     
  • darbyjohnston

    darbyjohnston - 2018-10-30

    Hi,

    Sorry for the very late reply! I will add this to the next version.

     
  • darbyjohnston

    darbyjohnston - 2018-10-30
    • assigned_to: darbyjohnston
    • Group: None --> 1.3.0
     
  • darbyjohnston

    darbyjohnston - 2018-10-31
    • status: open --> pending
     
  • Bret Karson

    Bret Karson - 2018-11-02

    Thank you. While this this being considered, can it be made so that djv_convert can convert straight material to premultiplied? It can be useful when encoding nice looking previews for distribution while keeping the orignal material straight.

     
  • darbyjohnston

    darbyjohnston - 2018-11-02

    Sure thing, good suggestion!

     
  • darbyjohnston

    darbyjohnston - 2018-12-28
    • Group: 1.3.0 --> 1.2.3
     
  • darbyjohnston

    darbyjohnston - 2018-12-28
    • Group: 1.2.3 --> 1.3.0
     
  • darbyjohnston

    darbyjohnston - 2019-06-02

    Hi, sorry again for the very long delay! I just released a new version which has a toggle for pre-multiplied alpha in the "Image" menu. You can download it here:
    http://djv.sourceforge.net/Download.html

    I realized I forgot to also add the option to djv_convert, which I will do for the next version.

     
  • darbyjohnston

    darbyjohnston - 2019-06-03

    I made a separate ticket to add the pre-multiplied toggle to djv_convert:
    https://sourceforge.net/p/djv/feature-requests/78/

     
  • darbyjohnston

    darbyjohnston - 2019-06-03
    • status: pending --> closed