On 28 August 2011 13:37, Thomas Baruchel <baruc...@gmx.com> wrote:
> On Sun, 28 Aug 2011, Jon Nordby wrote:
>> Using path = "-" on a load operation is meant to work for this
>> purpose. If it does not, that is a regression and is worth a bug
>> report.
> Thank you for your very quick answer. I have some other questions. First,
> I couldn't manage to get it work with the standard input. I tried
> with - with '-' and with "-" like that:
I tested it now and it does indeed not work in latest gegl.
Will you file a bugreport for this issue and the previous one
(previous issue should probably be filed against GIMP)?

> Another question: is there a way to blend layers by combining the HSV or HSL
> values (ie. take hue and saturation from one layer and light from the
> other one)? ImageMagick calls these modes: Luminize or Colorize; Gimp calls
> them Color or Value:
> http://www.imagemagick.org/Usage/compose/#hue
> http://www.linuxtopia.org/online_books/graphics_tools/gimp_advanced_guide/gimp_guide_node55_004.html

I do not think there are such operations available at the moment (they
should have been in the "compositors" category of the operation
Implementing such an operation can be done by subclassing
GeglOperationPointComposer, and using BABL to convert between HSV and

We want to have such operations in GEGL, contributions very welcomed!

1. http://gegl.org/operations.html#Categories

Jon Nordby - www.jonnor.com
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