"Toner/Ink Saver" implementation?

[gary carroll]

Michael Sweet wrote:
> garycarroll wrote:
> 
>> Neither the brightness or gamma functions do what I want, since each 
>> lightens grays but leaves dead black unchanged. I do think one or the 
>> other is in fact what most people would want, since most want to save 
>> toner on graphics but leave text black.
> 
> 
> Sounds like your printer or driver is bypassing the PostScript
> transfer function, or the current implementation of brightness
> isn't working with your apps/documents.
> 
>> Your comment about the transfer function pointed me at what I needed.
>> added several modified transfer functions to the ppd so that the user 
>> can select the desired transfer function via the CUPS "modify printer" 
>> UI. The user selects the appropriate function to fit the printer 
>> (different printers react differently), the document type, and the 
>> degree of lightening that is acceptable. Rather than change the 
>> function for different runs we just set up several queues pointing to 
>> the same printer, each with a different function selected.
> 
> 
> Hmm, that would seem to indicate that brightness is not working in
> the current release.  Can you file a STR on this so we can fix it
> for 1.2.3?
> 
> Thanks!
> 
Yes, I will do a little more experimenting so I can file something 
properly. It also occurs to me I should test on more than one printer, 
just in case it's something wierd with just that printer.