30-bit displaying with Krita?

Kai-Uwe Behrmann ku.b at gmx.de
Wed Dec 23 15:55:18 CET 2009

In Krita 2.0.2 on xf86_64 Linux image displaying appears to be limited to 
8-bit per channel even with OpenGL switched on. The source material 
is a 16-bit/3-channels gray gradient Tiff file. But the display output 
looks like 8-bit. Kritas colour picker shows fine differences on a pixel 
level. So loading appears to be correct. However the Krita display showes 
lesser differences. Does Krita display its data in OpenGL as 

Any otheridea why Krita gives only 8-bit output?

In my tests a small test OpenGL viewer shows the rendering in 30-bit 
display mode ("RGB weight 101010") different from Krita and very smooth as 

kind regards
Kai-Uwe Behrmann
developing for colour management
www.behrmann.name + www.oyranos.org

PS: I write in digest mode.

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