Re: [Gimp-developer] [Gegl-developer] Don't make an architectural mistake based on a groundless premise

[Jon Nordby <jononor gmail com>]

On 11 October 2014 13:41, Elle Stone <ellestone ninedegreesbelow com> wrote:

> On 10/10/2014 07:49 PM, Øyvind Kolås wrote:
>
> > This is not about how images with no embedded profile are handled.
> > sRGB derived 8bit (and to a lesser degree 16bit) formats are used for
> > many other things than images with no embedded profile.
>
> You falsely assume that 8-bit images are always sRGB images and that
> 16-bit integer images are probably sRGB images.
No-one said always. sRGB is however the most common for 8-bit images.


> These pixel
> > formats are crucical for integrating with existing file formats and
> > libraries;
>
> File formats that only work with sRGB images should not impact
> color-managed image editing. Advise the user to convert to sRGB.
>
> Accurate UI colors is a desktop color management issue, entirely
> irrelevant to programming a color-managed image editor.

The application needs to interface with the desktop (windowing system).
GIMP uses GTK+ for that, which uses Cairo APIs for rendering - which
basically assumes 8-bit sRGB. I suspect that on X11/Linux these assumptions
go deeper in the graphics stack as well.  Yes, it is not right, but such is
the state of things. We will have to improve it step-by-step.


-- 
Jon Nordby - www.jonnor.com