GIMPのPython-Fuでピクセル単位のアクセスで高速塗りつぶし

#!/usr/bin/env python
# coding: utf8

from gimpfu import *
from array import array
from time import time

def getset_pixel_type(layer, w, h):
    # 範囲選択水平ループ
    for x in range(0, w):
        # 範囲選択垂直ループ
        for y in range(0, h):
            # ピクセルを取得
            ch, pixel = pdb.gimp_drawable_get_pixel(layer, x, y)
            pixel = (pixel[0], 0, 0, 255)
            # ピクセルをセット
            pdb.gimp_drawable_set_pixel(layer, x, y, ch, pixel)

def rgn_type(layer, w, h):
    src_rgn = layer.get_pixel_rgn(0, 0, w, h, False, False)
    dst_rgn = layer.get_pixel_rgn(0, 0, w, h, False, True)
    # 範囲選択水平ループ
    for x in range(0, w):
        # 範囲選択垂直ループ
        for y in range(0, h):
            p = map(ord, src_rgn[x, y])
            dst_rgn[x, y] = array("B", [ 0, p[1], 0, 255 ]).tostring()

def rgnbatch_type(layer, w, h):
    src_rgn = layer.get_pixel_rgn(0, 0, w, h, False, False)
    dst_rgn = layer.get_pixel_rgn(0, 0, w, h, False, True)
    src_pixels = array("B", src_rgn[0:w, 0:h])
    pixel_size = len(src_rgn[0,0])
    dest_pixels = array("B", "\x00" * (w * h * pixel_size))
    # 範囲選択水平ループ
    for x in range(0, w):
        # 範囲選択垂直ループ
        for y in range(0, h):
            pos = (x + w * y) * pixel_size
            val = src_pixels[pos: pos + pixel_size]
            val[0] = 0
            val[1] = 0
            val[2] = val[2]
            dest_pixels[pos : pos + pixel_size] = val
    dst_rgn[0:w, 0:h] = dest_pixels.tostring() 

def plugin_main(filltype):
    w = 192
    h = 192
    image = pdb.gimp_image_new(w, h, 0)
    layer = pdb.gimp_layer_new(image, w, h, 1, "Background", 100, 0)
    image.add_layer(layer)
    color = (255, 255, 255, 1.0)
    pdb.gimp_context_set_foreground(color)
    pdb.gimp_drawable_edit_fill(layer, 0)
    pdb.gimp_display_new(image)
    start1 = time()
    if filltype == "getset":
        getset_pixel_type(layer, w, h)
    elif filltype == "rgn":
        rgn_type(layer, w, h)
    elif filltype == "rgnbatch":
        rgnbatch_type(layer, w, h)
    proc_time = time() - start1
    gimp.message("実行時間:{0}".format(proc_time))
    layer.flush()
    layer.merge_shadow()
    layer.update(0, 0, w, h)

register("FillBench", "", "", "", "", "",
    "FillBench", 
    "",
    [
    (PF_RADIO, "filltype", "塗りつぶし方法", "getset", (("getset_pixel", "getset"), ("rgn", "rgn"), ("rgnbatch", "rgnbatch"))),
    ],
    [],
    plugin_main,
    menu = "<Image>/Filters")

main()