[krita] [Bug 375585] [mergedimage.png] Vectors layers are not correctly rendered anymore

[David REVOY]

https://bugs.kde.org/show_bug.cgi?id=375585

David REVOY <i...@davidrevoy.com> changed:

           What    |Removed                     |Added
----------------------------------------------------------------------------
             Status|RESOLVED                    |REOPENED
         Resolution|FIXED                       |---
     Ever confirmed|0                           |1

--- Comment #6 from David REVOY <i...@davidrevoy.com> ---
Hey, I ran a big hour of new tests, and I have new informations changing
everything!

New observations:
=================
The bug affect only vector-layers **with a layer-style on it**. On my example
file, the layer-style was disabled (Fx icon on layer stack). So, this new
information invalidate the time period information in my report. It can be old.
I saw it only last evening. Even if the layer-style is disabled it's sufficient
to trigger the bug (Fx icon is greyed, not removed). It's easy to reproduce
with krita-3.1.2-x86_64.appimage but **also** krita-3.1.1-x86_64.appimage and
krita-3.0.94-x86_64.appimage ... the bug is even more dramatic with
krita-3.0.92-x86_64.appimage ( no tiles rendered at all in this situation )
*but* krita-3.0.1-Alpha-4c91a18-x86_64.appimage render everything correctly
same for krita-3.0.1-x86_64.appimage , krita-3.0.1.1-x86_64.appimage ,
krita-3.0.91-x86_64.appimage ; so it means the bug born between 3.0.91 and
3.0.92! ( so between 2016-10-19 and ... 3.0.92 don't have tag in the code, but
from blog-post 'Third Beta' it's on 2016-11-07 ).   Also, now I can reproduce
the bug with any file, with this steps:

To reproduce bug from a new file:
=================================
1. open a new 512x512 px white document
2. create a vector layer on top
4. fill canvas with random vector circles, squares and lines
3. right-click on the vector-layer -> Layer-style
4. in Layer style dialog activate the check-box in front of Bevel and Emboss
(and Enable Effects) and press OK.
5. Save the file as test.kra
6. On your file manager, open the *.kra file with an archive editor/extractor,
and visualize the mergedimage.png

Result:
=======
mergedimage.png is empty: no tiles were fast enough to render.

Workaround: 
===========
- put all mis-rendered vector-layers inside group.
- remove the layer-styles.

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