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64 lines
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Python

#!/usr/bin/env python
from PIL import Image
import re
def fitbox (boxw, boxh, w, h):
rw = boxw
rh = int(rw * (float(h) / w))
if (rh >= boxh):
rh = boxh
rw = int(rh * (float(w) / h))
return rw, rh
def tile_image (im, maxz=0, tilew=256, tileh=256, base=".", template="z{0[z]}y{0[y]}x{0[x]}.jpg", bgcolor=(0,0,0)):
z = 0
boxw, boxh = tilew, tileh
alpha = bgcolor != None # not template.endswith("jpg")
while True:
rw, rh = fitbox(boxw, boxh, im.size[0], im.size[1])
rim = im.resize((rw, rh), Image.ANTIALIAS)
if bgcolor:
tim = Image.new("RGB", (boxw, boxh), bgcolor)
tim.paste(rim, (0, 0))
else:
tim = Image.new("RGBA", (boxw, boxh))
tim.paste(rim, (0, 0))
rows, cols = 2**z, 2**z
for r in range(rows):
for c in range(cols):
ix = c*tileh
iy = r*tilew
cim = tim.crop((ix, iy, ix+tilew, iy+tileh))
op = base + template.format({'z':z, 'x':c, 'y':r})
# if not alpha:
# cim = cim.convert("RGB")
cim.save(op)
z += 1
if z>maxz:
break
boxw *= 2
boxh *= 2
if __name__ == "__main__":
from argparse import ArgumentParser
p = ArgumentParser("tile an image")
p.add_argument("--tilewidth", type=int, default=256, help="default: 256")
p.add_argument("--tileheight", type=int, default=256, help="default: 256")
p.add_argument("input")
p.add_argument("--output", default="./tile", help="output path, default: ./tile")
p.add_argument("--tilename", default="Z{z}Y{y}X{x}.jpg", help="template for tiles, default: Z{z}Y{y}X{x}.jpg")
p.add_argument("--background", default="0,0,0", help="background color, default: 0,0,0")
p.add_argument("--zoom", type=int, default=0, help="default 0")
args = p.parse_args()
im = Image.open(args.input)
tilename = re.sub(r"\{(.+?)\}", r"{0[\1]}", args.tilename)
background = tuple([int(x) for x in args.background.split(",")])
tile_image (im, args.zoom, args.tilewidth, args.tileheight, args.output, tilename, background)