On 11 October 2014 13:41, Elle Stone <ellestone@xxxxxxxxxxxxxxxxxxxx> 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
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