Text with outline and blur (GIMP Python-Fu)

from gimpfu import *

def munge(img, s):
    names = []
    for layer in img.layers:
        names.append(layer.name)
    n = 0
    s1 = s
    while s1 in names:
        s1 = '{}{}'.format(s, n)
        n += 1
    return s1

def do_stuff(img, layer, initstr, font, size, fgcolor, bgcolor, outline_radius, blur_radius):
    gimp.progress_init("Doing stuff to " + layer.name + "...")

    # Set up an undo group, so the operation will be undone in one step.
    pdb.gimp_undo_push_group_start(img)

    # Save the current foreground color:
    pdb.gimp_context_push()

    # Set the text color
    gimp.set_foreground(fgcolor)
    gimp.set_background(bgcolor)

    # Get position of current selection, if there is one
    # Otherwise, put the new text near top-left of image
    non_empty, x1, y1, x2, y2 = pdb.gimp_selection_bounds(img)

    if non_empty == True:
        x = x1
        y = y1
    else:
        x = 5
        y = 5

    # Create a new text layer (-1 for the layer means create a new layer)
    text_layer = pdb.gimp_text_fontname(
        img, None, x, y, initstr, -1, True, size, PIXELS, font)

    # Path from text
    text_vectors = pdb.gimp_vectors_new_from_text_layer(img, text_layer)

    pdb.gimp_image_insert_vectors(img, text_vectors, None, 0)

    # Make the layer a little bigger
    w = text_layer.width
    h = text_layer.height

    text_layer.resize(w + 10, h + 10, 5, 5)

    # New layer for the outline
    bg_layer = img.new_layer(munge(img, initstr + ' Background'))

    # Select the path created earlier
    pdb.gimp_image_select_item(img, CHANNEL_OP_REPLACE, text_vectors)

    # Same as Select -> Grow...
    pdb.gimp_selection_grow(img, outline_radius)

    # Fill in the outline
    pdb.gimp_edit_bucket_fill(bg_layer, BG_BUCKET_FILL, NORMAL_MODE,
                              100, 0, False, 0., 0.)

    # Apply the blur
    pdb.gimp_selection_all(img)
    if blur_radius > 0:
        pdb.plug_in_gauss_iir(img, bg_layer, blur_radius, True, True)

    #Move the outline layer underneath the text layer
    pdb.gimp_image_lower_item(img, img.layers[0])

    #Merge outline and text layers
    pdb.gimp_image_merge_down(img, img.layers[0], EXPAND_AS_NECESSARY)

    # Show the new image window
    gimp.displays_flush()

    # Restore the old foreground color:
    pdb.gimp_context_pop()

    # Close the undo group.
    pdb.gimp_undo_push_group_end(img)

register(
    "python_fu_glow",
    "Text glow effect",
    "Create glow effect around text",
    "flamethrower",
    "flamethrower",
    "2017",
    "Glow...",
    "*",
    [
        (PF_IMAGE, "image", "Input image", None),
        (PF_DRAWABLE, "drawable", "Input layer", None),
        (PF_STRING, "string", "Text string", 'Hello, world!'),
        (PF_FONT, "font", "Font face", "Arial"),
        (PF_SPINNER, "size", "Font size", 16, (1, 3000, 1)),
        (PF_COLOR, "color", "Text color", (255., 255., 255.)),
        (PF_COLOR, "color", "BG color", (1.0, 0.0, 0.0)),
        (PF_SPINNER, "outline_radius", "Outline radius", 1, (1, 100, 1)),
        (PF_SPINNER, "blur_radius", "Blur radius", 3, (0, 100, 1))

    ],
    [],
    do_stuff, menu="<Image>/Filters/Alpha to Logo")

main()