[Gimp-developer] easier way to convert image into selection

[David Gowers]

On 9/15/06, William Skaggs <weskaggs at primate.ucdavis.edu> wrote:
>
>
>
> From: Alexander Rabtchevich <alexander.v.rabtchevich at iaph.bas-net.by>
>
> >Some plug-ins (edge detection for example) provide images as a result.
> >If their result is required as a selection, I new only one way to make
> >it: create layer mask, copy the image into the mask and convert the mask
> >into selection. Is there a shorter way to do it?
> >
> >More common question: maybe it worth improving such plug-ins with an
> >option "Create selection"?
>
> I don't think so, but it might be nice to have a "layer to selection"
> filter that would create a selection from the gray values of the
> active layer.
>
>   -- Bill



Working on it.

It's much easier to code 'image to selection':

        c = pdb.gimp_channel_new_from_component(image, GRAY_CHANNEL, 'TEMP
IMAGE2SELECTION')
        image.add_channel(c)
        pdb.gimp_selection_load(c)
        image.remove_channel(c)
        gimp.delete(c)

'layer to selection' is:

            pdb.gimp_selection_none(image)
            buf = pdb.gimp_edit_named_copy(drawable, bufname)
            c = pdb.gimp_channel_new(image, image.width, image.height,
bufname, 50.0, (0,0,0))
            image.add_channel(c)
            fsel = pdb.gimp_edit_named_paste(c, buf, False)
            pdb.gimp_floating_sel_anchor(fsel)
            pdb.gimp_selection_load(c)
            image.remove_channel(c)
            gimp.delete(c)
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