bugMyPaint - Bugs: bug #16741, Background image shifted when...

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bug #16741: Background image shifted when reactivated

Submitted by:  Griatch <griatch>
Submitted on:  Tue 21 Sep 2010 07:21:21 PM UTC  
Severity: 3 - NormalPriority: 5 - Normal
Status: ConfirmedPrivacy: Public
Assigned to: NoneOpen/Closed: Open
Release: GITPlanned Release: None
Operating System: Linux Debian

Sun 03 Oct 2010 07:28:29 AM UTC, comment #2:

Actually the same bug also happens with OpenRaster.

In contrast to PNG, you would usually not have re-activate the same background, because it gets loaded properly as background pattern. But if you do, it gets shifted with no way to recover.

Martin Renold <martinxyz>
Project Administrator
Wed 22 Sep 2010 05:22:17 PM UTC, comment #1:

That's why you should save to OpenRaster instead of PNG.

This works for small backgrounds only because mypaint always adds padding to the next tile. We could store the background offset as a PNG property, maybe. It feels a bit like a hack...

Martin Renold <martinxyz>
Project Administrator
Tue 21 Sep 2010 07:21:21 PM UTC, original submission:

Steps to reproduce:

1) Start MyPaint, load one of the "patterned" Background images (e.g. the comic-page template or movie storyboard template patterns).
2) Work with these background as reference, e.g create a comic page.
3) Save as PNG. Shut down MyPaint.
4) Start MyPaint and load your work again. Re-activate the same background as before.

In this last step I find that the background is now shifted half a comic-page relative to the open PNG image, making it impossible to continue working. It seems the origin point of the PNG image has changed relative to the background.

Griatch <griatch>


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Carbon-Copy List
  • -unavailable- added by jonnor (Updated the item)
  • -unavailable- added by martinxyz (Posted a comment)
  • -unavailable- added by griatch (Submitted the item)

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    Follow 2 latest changes.

    Date Changed By Updated Field Previous Value => Replaced By
    Sun 10 Oct 2010 11:05:48 AM UTCjonnorStatusNone=>Confirmed
      SummaryBackground image not matched=>Background image shifted when reactivated
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