Ahh... autoformatting... this should be easier to read... (sorry)
def create_border(image, selection_type='rectangle', size=1):
is_selection, x1, y1, x2, y2 = pdb.gimp_selection_bounds(image)
if is_selection:
if size < 1:
size = 1
if selection_type =='rectangle':
pdb.gimp_rect_select(image,
x1+size,
y1+size,
(x2-x1)-(size*2),
(y2-y1)-(size*2),
CHANNEL_OP_SUBTRACT,
False,
0)
elif selection_type == 'ellipse':
pdb.gimp_ellipse_select(image,
x1+size,
y1+size,
(x2-x1)-(size*2),
(y2-y1)-(size*2),
CHANNEL_OP_SUBTRACT,
True,
False,
0)
else:
gimp.message("Please make a selection...")
def test_plugin(image, drawable):
image.undo_group_start()
# A rectangular selecion with default settings...
create_border(image)
# Ellipse with custom settings... Uncomment to activate
#create_border(image, selection_type='ellipse', size=3)
# Fill
pdb.gimp_edit_fill(drawable, 0)
pdb.gimp_selection_none(image)
image.undo_group_end()
On 09/24/2010 06:18 PM, Jerry Baker wrote:
> Calculating a new selection from the current selection would be faster
> (I think):
>
> def create_border(image, selection_type='rectangle', size=1):
> is_selection, x1, y1, x2, y2 = pdb.gimp_selection_bounds(image)
>
> if is_selection:
> if size< 1:
> size = 1
> if selection_type =='rectangle':
> pdb.gimp_rect_select(image, x1+size, y1+size,
> (x2-x1)-(size*2), (y2-y1)-(size*2), CHANNEL_OP_SUBTRACT, False, 0)
> elif selection_type == 'ellipse':
> pdb.gimp_ellipse_select(image, x1+size, y1+size,
> (x2-x1)-(size*2), (y2-y1)-(size*2), CHANNEL_OP_SUBTRACT, True, False, 0)
> else:
> gimp.message("Please make a selection...")
>
> def test_plugin(image, drawable):
> image.undo_group_start()
>
> create_border(image) # A rectangular selecion with default
> settings...
> #create_border(image, selection_type='ellipse', size=3) # Or
> Ellipse with custom settings...
>
> # Fill
> pdb.gimp_edit_fill(drawable, 0)
> pdb.gimp_selection_none(image)
>
> image.undo_group_end()
>
> On 09/24/2010 10:19 AM, Ofnuts wrote:
>> Hi,
>>
>> My code needs to do a one-pixel-wide selection, at distance "x" from the
>> current selection. This looks a lot like a border selection except that
>> the border selection creates at best a two-pixel wide ribbon and I only
>> want one (but if I'm wrong, please tell me how to :-)
>>
>> So far my code goes like this:
>>
>> # Selects pixels that are between x and x+1 pixels from
>> # the original selection. Bumping the selection by one
>> # each time doesn't work, a small circle degenerates into
>> # a square with rounded corners instead of a big circle.
>> def select_ribbon(self,image,selection,dist):
>> pdb.gimp_selection_load(selection)
>> pdb.gimp_selection_grow(image,dist+1)
>> outer=pdb.gimp_selection_save(image)
>> pdb.gimp_selection_load(selection)
>> pdb.gimp_selection_grow(image,dist)
>> inner=pdb.gimp_selection_save(image)
>> pdb.gimp_channel_combine_masks(outer,inner,CHANNEL_OP_SUBTRACT,0,0)
>> pdb.gimp_selection_load(outer)
>> image.remove_channel(outer)
>> image.remove_channel(inner)
>>
>> That works, but can be slow (especially since it's at the core of a
>> loop). Is there any better way? Or useless code to jettison?
>>
>> Next improvement is to create a 3-pixels selection and feather it one
>> pixel. Anything to be wary of?
>>
>> --
>> Ofnuts
>>
>> _______________________________________________
>> Gimp-developer mailing list
>> Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx
>> https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
> _______________________________________________
> Gimp-developer mailing list
> Gimp-developer@xxxxxxxxxxxxxxxxxxxxxx
> https://lists.XCF.Berkeley.EDU/mailman/listinfo/gimp-developer
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