[sane-devel] inactive options / xsane

Tobias Richter tsr-debian at achos.com
Sun Jan 5 16:32:27 UTC 2014

tsr-debian at achos.com wrote:
> How does xsane manage to do what the library refuses to do?
> Why can't the command line tools to the same thing?
> Or why can't the library handle this transparently for the application
> (if the trick is in separate settings for each colour channel)?

After a bit of source code reading I discovered that xsane applies 
this in a post processing step. Only when switching to gray scale it
supports native brightness and contrast contol in the device just as 
scanimage does. All is back to normal.

Now that I know what to look for this is trivial to find on Google.
I was following a trangent with this "inactive" setting that is a 
bit confusing.

Sorry for the noise. 


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