Bug 351482

Summary:	Locked alpha can be modified with an eraser
Product:	[Applications] krita	Reporter:	Floatharr <kde.10.floatharr>
Component:	Layer Stack	Assignee:	Krita Bugs <krita-bugs-null>
Status:	RESOLVED INTENTIONAL
Severity:	normal	CC:	halla
Priority:	NOR
Version First Reported In:	unspecified
Target Milestone:	---
Platform:	Microsoft Windows
OS:	Microsoft Windows
Latest Commit:		Version Fixed/Implemented In:
Sentry Crash Report:

Description Floatharr 2015-08-19 13:11:19 UTC

Eraser doesn't respect the locked alpha toggle. 

For example when using white pixels in an alpha locked multiply layer as a mask this regularly causes me to have to go back and repair it since I only notice it much later since the change is invisible until I try to paint on the layer again.

Reproducible: Always

Steps to Reproduce:
1. Make a document with only 1 transparent layer
2. Paint on the layer with a brush
3. Lock alpha of the layer
4. Hit E and erase

Actual Results:  
Alpha is modified despite the alpha lock. Painting on the layer becomes impossible until alpha is unlocked and re-created.

Expected Results:  
Alpha remains the same. Maybe paint with background color instead (like photoshop), do nothing. Subsequent paint strokes are visible and constrained in the expected area.

Comment 1 Halla Rempt 2016-03-22 15:29:47 UTC

Alpha lock meant to make sure you don't draw outside the lines, not to prevent you from erasing what's there, so this works as expected, I think.