Bug 347845

Summary:	Gaussian blur filter is limited to 100px range
Product:	[Applications] krita	Reporter:	Jonas Thiem <jonas.th>
Component:	Filters	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	wishlist	CC:	grossosilvio, halla
Priority:	NOR
Version First Reported In:	2.9.4
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Jonas Thiem 2015-05-17 17:02:59 UTC

The Gaussian blur filter is limited to 100px range for no apparent reason. Much worse, there's also no obvious way to override that. (Compare GIMP 2.8 here, where you can simply click and drag beyond the right side of the slider and it will easily let you specify something beyond the default maximum - or you can double-click and enter a value and IT ACCEPTS something larger than the maximum whereas krita doesn't)

Because this largely limits the use of blurring on really large images, it would be nice if you could fix this soon. (alternatively, tell me how to work around  this limitation)

Reproducible: Always

Steps to Reproduce:
1. Filter -> Gaussian blur
2. Try to blur a range larger than 100px.

Actual Results:  
You can't. (at least as far as I can see as a user)

Expected Results:  
No *hard* limit on blur range - let me override to whatever I want.

Comment 1 Silvio Grosso 2015-05-17 17:43:52 UTC

Hello Jonas Thiem,

>  alternatively, tell me how to work around this limitation

Just out of curiosity, have you tried the G'MIC filters as well ?

I mean the G'mic filters allowing to blur your images:
Menu Filter > G'mic > Degradations > Blur (angular, depth-of-field, gaussian, glow, radial etc)

Hopefully, these G'mic filters might be a temporary workaround for you :-)

Comment 2 Jonas Thiem 2015-05-17 18:03:14 UTC

Is it supposed to help with the range? I just tried G'mic > Degradations > Blur [gaussian] and maxed out all sliders and pressed "Ok", and the result looks like it was barely blurred to a 20px range.

So no, that doesn't seem to help the slightest. (unless I misunderstood what "amplitude" means, shouldn't I max out the sliders for maximum range? I'm used to "range" for blur filter settings.)

Also for some reason, the filter took ~5 minutes just for 20px blurring. Compared to the default one, that's really insanely slow.

Comment 3 Halla Rempt 2016-01-24 15:25:51 UTC

Sorry, we will not in the near future get down to this.
WISHGROUP: Out of scope

The wish doesn't fit the architecture of our gaussian blur filter; a new gaussian blur filter that works like other application can be proposed as a patch. For now, it's out of scope.