resize_half.py

#!/usr/bin/env python
# -*- coding: utf-8 -*-

from gimpfu import *

def plugin_main(image, layer):
    image.disable_undo()
    image.resize(image.width / 2, image.height / 2, 0, 0)
    layer.scale(image.width, image.height, 0, 0)
    image.enable_undo()

register(
        "python_fu_resize_half",
        "blurb: Resize half",
        "help: Resize the picture to half size",
        "author",
        "copyright",
        "2017/9/11",
        "<Image>/Image/Resize to half size",
        "*",
        [],
        [],
        plugin_main)

main()