https://bugs.kde.org/show_bug.cgi?id=395124

            Bug ID: 395124
           Summary: Edge Detect filter layer initializes incorrectly and
                    requires manual refresh
           Product: krita
           Version: 4.0.3
          Platform: Other
                OS: Linux
            Status: UNCONFIRMED
          Severity: normal
          Priority: NOR
         Component: Filter Layers
          Assignee: [email protected]
          Reporter: [email protected]
  Target Milestone: ---

Sorry I can't attach test file. Reopening file fixes Edge Detect Layer so no
point in example file :(

It's hard for me to explain it xD
To understand it, the best way is to reproduce the effect. Steps below.

Description:
If user creates Filter Layer with Edge Detect filter it displays wrong output
of this filter, resulting with opaque black layer with edge from input layer.

Steps:
1 In empty file, add group with Pain Layer.
2 Paint shape on this Layer.
3 Create Filter Layer and apply Edge Detect filter to it.
4 Click "Eye" icon of this Filter Layer.
5 Click "Eye" again

Results:
Before step 4 and 5 Edge Detect displays different (preview?) output.

Expected result:
Edge Detect like output after step 5

Extra info:
I create layers like this also from Python and it has similar issues, although
even worse. Layer is not displaying anything at all. I have to manually refresh
it with step 4-5.

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