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#!/usr/bin/env python
#-*- encoding: utf-8 -*-
#
# atlas.py
# Generates a texture atlas.
#
# Copyright (c) 2008 Pierre "delroth" Bourdon <root@delroth.is-a-geek.org>
#
# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
import os, sys, time, random
from glob import glob
try:
from PIL import Image
except:
print "You need the Python Imaging Library to use this script."
sys.exit(1)
try: import psyco
except:
print "You should really install the Psyco module, it will speed up"
print "the computations ;)"
class Grid(object):
def __init__(self):
self.w = self.h = 1
self.placed = []
def place(self, w, h):
while w > self.w: self.w *= 2
while h > self.h: self.h *= 2
surface = self.w * self.h
surf_used = 0
for ax,ay,aw,ah in self.placed:
surf_used += aw * ah
print "Ratio used / total : %f" % (surf_used / float(surface))
if surface - surf_used < w * h:
if self.w + w <= self.h: self.w *= 2
else: self.h *= 2
y, x = self.h, self.w
while y >= 0:
while x >= 0:
for ax,ay,aw,ah in self.placed:
while x > 0 and ax < x < ax + aw: x -= 1
if x == 0:
while y > 0 and ay < y < ay + ah: y -= 1
canbeplaced = True
for i in xrange(w):
if not canbeplaced: break
for j in xrange(h):
for ax,ay,aw,ah in self.placed:
if ((ax <= x + i < ax + aw and ay <= y + j < ay + ah)
or x + i >= self.w or y + j >= self.h):
canbeplaced = False
break
if not canbeplaced: break
if canbeplaced:
self.placed.append((x, y, w, h))
return (x, y)
x -= 16
x = self.w
y -= 16
if self.w + w <= self.h:
x = self.w
y = 0
self.w *= 2
self.placed.append((x, y, w, h))
return (x, y)
else:
x = 0
y = self.h
self.h *= 2
self.placed.append((x, y, w, h))
return (x, y)
def main(argv):
if len(argv) < 3:
print "USAGE: %s <files-pattern> <coords-file>" % argv[0]
return 1
random.seed()
files = glob(argv[1])
random.shuffle(files);
images = [Image.open(f) for f in files]
g = Grid()
pos = []
try:
for e,i in enumerate(images):
print "Placing %s" % files[e]
t = time.time()
pos.append((files[e], i, g.place(*i.size)))
print "Placed, size of the grid is now %dx%d" % (g.w, g.h)
#print "Time needed: %f s" % (time.time() - t)
print "Done: %d/%d (%f%%)" % (e+1, len(files), 100*float(e+1)/len(files))
except KeyboardInterrupt:
print "Interrupted, press enter to continue or C-C to exit"
raw_input()
print
print "Generation completed ! Now, generating the coords file."
fp = open(argv[2], 'w')
fp.write("size %d %d\n" % (g.w, g.h))
for f,i,p in pos:
fp.write("%s %d %d\n" % (f, p[0], p[1]))
print "File generated ! Exiting..."
return 0
if __name__ == '__main__': sys.exit(main(sys.argv))
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