Bug 356537 - "Alpha Darken" brush blending mode doesn't use sensor-modulated opacity
Summary: "Alpha Darken" brush blending mode doesn't use sensor-modulated opacity
Status: RESOLVED FIXED
Alias: None
Product: krita
Classification: Applications
Component: Brush engines (other bugs)
Version First Reported In: 2.9.10
Platform: Compiled Sources Linux
: NOR normal
Target Milestone: ---
Assignee: Krita Bugs
URL:
Keywords:
Depends on:
Blocks:
 
Reported: 2015-12-12 03:26 UTC by Nicholas LaPointe
Modified: 2016-04-16 13:08 UTC (History)
1 user (show)

See Also:
Latest Commit:
Version Fixed In:
Sentry Crash Report:

Attachments
Image showing issue (9.34 KB, image/png)
2015-12-12 03:26 UTC, Nicholas LaPointe 		Details
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Description Nicholas LaPointe 2015-12-12 03:26:16 UTC 
When used as a brush blending mode, alpha darken uses only the opacity value specified in the toolbar and ignores modifications provided by sensors.

Reproducible: Always

Steps to Reproduce:
1. Select "Basic-tip-default"
2. Set color to black
3. Set opacity to 1.00
4. Set brush blending mode to "Alpha Darken"
5. Draw a line with medium pressure
6. Draw a line intersecting that line, with lighter pressure

Actual Results:  
A darker intersection is formed

Expected Results:  
The first line should have remained unmodified
Comment 1 Nicholas LaPointe 2015-12-12 03:26:59 UTC 
Created attachment 96001 [details]
Image showing issue

The left cross was drawn as described, and the right cross was drawn by disabling the pen settings for opacity and manually setting the opacity from the toolbar.
Comment 2 Halla Rempt 2016-04-16 13:08:46 UTC 
I'm sorry, but this is expected behavior; please check whether the Greater blending mode works for your workflow instead. Alpha Darken actually only was intended to be an internal blending mode only used for the wash mode when painting, but people wanted to have it available anyway.