[poppler] proposal: render dark text as black

[Adrian Johnson]

Jon Cruz wrote:
> On Mar 8, 2010, at 10:44 AM, leidola at newcon.de wrote:
> 
>> Digging a bit further it seems as if acroread does something like using
>> a "luminescence threshold" below which the printed text is defined as
>> black, even if it is not gray, but something like
>>
>> rgb 0.140993 0.121996 0.125002 
>>
>> Is doing the same feasible? And if yes, where is the right way to put
>> it? Knowing where to start, I could try to create a patch.
>>
>>
>> (*): It looks as if there is a halo around the letters of the text;
>> it's not clear.
> 
> Might it be doing CMYK values and using "rich black" to create good print output?
> http://en.wikipedia.org/wiki/Rich_black

The PostScript output device just passes through whatever is in the PDF 
file. ie the PostScript output will use the same color space and color 
component values as the PDF file.