[Openicc] cross platform toolkits and CM

[Kai-Uwe Behrmann]

Am 02.09.10, 18:26 +0200 schrieb Kai-Uwe Behrmann:
> Am 02.09.10, 10:09 +0200 schrieb Cyrille Berger:
>> On Thursday 02 September 2010, Kai-Uwe Behrmann wrote:
>>> Just an excerpt from my blog:
>>> http://oyranos-cms.blogspot.com/2010/09/cross-platform-toolkits-and-cm.html
>>> 
>>> Application developers be warned. FLTK and Qt defaults to "Generic RGB" on
>>> osX SL. This means no sRGB primaries, alias a different Gamut, and a Gamma
>>> of 1.8.
>> 
>> Has it being reported to FLTK or Qt ? Otherwise they are unlikely to fix 
>> it...
>
> FLTK feature request: http://www.fltk.org/str.php?L2411
> Qt feature request: http://bugreports.qt.nokia.com/browse/QTBUG-13370

generic RGB from ColorSync utility is not the same as 
CGColorSpaceCreateDeviceRGB(). The later is sRGB. I had to fiddle in 
order to save a CGColorSpace to a ICC profile on disk. The former is
the old gamma 1.8 RGB.

A bug report at Apple would be adequate too.

Qt/FLTK applications expecting to render to the device colour space 
render indeed to sRGB on osX SL if they use CGColorSpaceCreateDeviceRGB() 
as both do.

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