<html>
<head>
<meta http-equiv="content-type" content="text/html; charset=UTF-8">
</head>
<body text="#000000" bgcolor="#FFFFFF">
<p>Hi to all,<br>
It was nice to attend LGM2019 my first time and talk to a lot of
LGM Developers and Designers. :-))<br>
</p>
<p>I want to dive deeper in GEGL and the OpenRaster Format
concerning color and have some questions:<br>
<br>
<b>1) Current state of the OpenRaster specifications:</b><br>
I found following site about the OpenRaster Specifications<br>
1a) <a class="moz-txt-link-freetext" href="https://www.openraster.org/">https://www.openraster.org/</a><br>
1b) <a class="moz-txt-link-freetext" href="https://freedesktop.org/wiki/Specifications/OpenRaster/">https://freedesktop.org/wiki/Specifications/OpenRaster/</a></p>
<p>They have very similar content, but 1a seems to be most up to
date version. Is this correct?<br>
</p>
<p><b>2) Whats about Color in OpenRaster ?</b><br>
I didn´t found any description about supported Colorspaces and the
handling of color profiles in the OpenRaster Spec.<br>
So which colorspaces are supported in OpenRaster:<br>
RGB<br>
RGBA<br>
Gray<br>
LAB<br>
1-Bit (Black and White)<br>
CMYK<br>
Spotcolor Channels / Multichannel Images<br>
</p>
<p>Does OpenRaster supports embedded ICC profiles?<br>
</p>
<p><b>3) GEGL and Color</b><br>
Pippin, did I understood you at LGM correct, that GEGL is able to
use different ICC-profiles for chunks/nodes in the GEGL tree ?<br>
If yes, is it correct, that OpenRaster would not be an appropriate
file format for such cases?<br>
or, If yes, do you provide an extension the the OpenRaster format?<br>
If not, this was probably a missunderstanding from my side...</p>
<p>If yes, the complexity of interactions between colormanagement
and blending modes will increase massively. Photoshop still avoids
this complexity by allowing only one profile per document. If any
new image with a differnt colorspace (e.g. CMYK instead of RGB) or
different profile (e.g. sRGB instead of AdobeRGB) will be added to
an document, all image colors will concerted to actual document
colorspace.</p>
<p>Best regards<br>
Jan-Peter<br>
</p>
<p><br>
</p>
<p><br>
</p>
<p><br>
</p>
<pre class="moz-signature" cols="72">--
Homann colormanagement tel: +49 30 611 075 18
Jan-Peter Homann mob: +49 171 54 70 358
Herzbergstr. 55 <a class="moz-txt-link-abbreviated" href="http://www.colormanagement.de">www.colormanagement.de</a>
10365 Berlin <a class="moz-txt-link-freetext" href="mailto:homann@colormanagement.de">mailto:homann@colormanagement.de</a>
</pre>
</body>
</html>