Any coder in "C" around here?

dinasset · **Posted:** Wed Jul 05, 2017 1:44 am **(#1)**

GIMP Version: 2.8.14
Operating System: Windows
GIMP Experience: Basic Level

List any relevant plug-ins or scripts:
Gimp Render/Pattern/Qbist

List any ERROR messages you received:
no possibility to use it from inside a (.py) filter

If there is some C expert and if (s)he likes to take a challenge, it could be interesting to add to the mentioned Gimp filter (Qbist) the possibility of being called from inside a filter, using the PDB interface, to generate random QBist patterns without the necessity to pre-load a set of generated patterns.
Thanks.

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1365

Hi dinasset.
I noticed the qbist filter is implemented from gimp-gap in the 'Filter all layers' menu.
So probably using the PDB interface. It works on one layer or many layers.

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4756

Yes, but it's the user's clicking that generates random patterns. As a far as I can tell you always get the same initial pattern once Gimp is started.

Tas_mania · **Joined:** Nov 04, 2015 **Posts:** 1365

Quote:

it's the user's clicking that generates random patterns

Your right ofnuts. Looking at qbist.c
https://github.com/piksels-and-lines-orchestra/gimp/blob/master/plug-ins/common/qbist.c#L1
it seems the main formula and 8 variations are coded into the plugin.
I guess re-writing qbist.c to be totally random is not a possibility because the new version would have to be distributed with the proposed plugin. Maybe including the 'random genetic formula' from qbist.c into the new plugin would be a solution? I'm sure Python can either load or include c code.

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4756

Tas_mania wrote:

Quote:

it's the user's clicking that generates random patterns

Your right ofnuts. Looking at qbist.c
https://github.com/piksels-and-lines-orchestra/gimp/blob/master/plug-ins/common/qbist.c#L1
it seems the main formula and 8 variations are coded into the plugin.
I guess re-writing qbist.c to be totally random is not a possibility because the new version would have to be distributed with the proposed plugin. Maybe including the 'random genetic formula' from qbist.c into the new plugin would be a solution? I'm sure Python can either load or include c code.

Yes, you can write a Python module in C, but in this case that would be more complicated than distributing a "qbist-with-api" plugin together with the script.

sallyanne · **Posted:** Thu Jul 06, 2017 4:56 am **(#6)**

Like the qbist pattern. Look forward to see if you can make anything with it.

dinasset · **Posted:** Thu Jul 06, 2017 5:30 am **(#7)**

The subject of my query is exactly that one, Sallyanne.
I have created a filter (my last ancillary) which makes use of QBist patterns, but the user has to have a set of pre-created patterns (which I attached also),

Rod · **Joined:** May 16, 2010 **Posts:** 14709 **Location:** USA

The only member of Gimp Chat i have ever seen mess with C programing is/was Scott (Tux).
When he added scrolling to script-fu.exe plug-in. =)

dinasset · **Posted:** Sat Jul 08, 2017 11:16 pm **(#9)**

Thanks Rod,
Unfortunately he is no more active now, unless....he likes to take this challenge!