Problem with pdb.gimp_drawable_set_pixel

PKHG · **Joined:** Sep 13, 2016 **Posts:** 137

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

Hello
who confirms this error for gimp.2.8.18 under windows 10 python console:
>>> image = gimp.image_list()[0]
>>> drawable = image.layers[0]
>>> for x in range(50):
... for y in range(50):
... pdb.gimp_drawable_set_pixel(drawable,x,y,3,(255,255,255))
...
>>>
on a totally black picture does not show a white square at all????

EDIT
I think a flush is missing and eventually a save and reopen

SOLVED so to say :yes

dinasset · **Posted:** Mon Oct 24, 2016 5:34 am **(#2)**

did you try also with ...x,y,4,(255,255,255,255)
maybe your open image is RGBA

PKHG · **Joined:** Sep 13, 2016 **Posts:** 137

dinasset wrote:

did you try also with ...x,y,4,(255,255,255,255)
maybe your open image is RGBA

No, was no RGBA ...

flush alone seemed not to help, save and open showed the pixel-manipulations ...

ofnuts · **Joined:** Oct 25, 2010 **Posts:** 4812

A script of mine that uses pdb.gimp_drawable_set_pixel() doesn't need more than pdb.gimp_displays_flush().

trandoductin · **Posted:** Mon Oct 24, 2016 11:57 am **(#5)**

you need to call this

Code: Select all

pdb.gimp_drawable_update(drawable,0,0,drawable.width,drawable.height)

PKHG · **Joined:** Sep 13, 2016 **Posts:** 137

Attachment:

glab_opacity_ex01.jpg [ 21.67 KiB | Viewed 2477 times ]

trandoductin wrote:

you need to call this

Code: Select all

pdb.gimp_drawable_update(drawable,0,0,drawable.width,drawable.height)

Thanks, good to know

EDIT:
used in my expanded guide-lab to fill selections with an color (either random or with color of the pixel in the center of an ellipse or rectangle)

Attachment:

glab_opacity_ex01.jpg [ 21.67 KiB | Viewed 2477 times ]