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from cStringIO import StringIO

try:

from PIL import Image as im

IMAGE_UTILS_AVAILABLE = True

Image = im.open

def resize(image, size):

output = StringIO()

back = im.new('RGBA', size, (0,0,0,0))

image.thumbnail(size, im.ANTIALIAS)

offset = [0,0]

if image.size[0] >= image.size[1]:

offset[1] = back.size[1]/2-image.size[1]/2

else:

offset[0] = back.size[0]/2-image.size[0]/2

back.paste(image, tuple(offset))

back.save(output, image.format)

contents = output.getvalue()

output.close()

return contents

except ImportError:

IMAGE_UTILS_AVAILABLE = False

LARGEST_ICON_SIZE = 1024

SMALLEST_ICON_SIZE = 16

sizes = [LARGEST_ICON_SIZE,512,256,128,48,32,SMALLEST_ICON_SIZE]

def nearest_icon_size(width, height):

maximum = max(width, height)

if maximum >= LARGEST_ICON_SIZE:

return LARGEST_ICON_SIZE

if maximum <= SMALLEST_ICON_SIZE:

return SMALLEST_ICON_SIZE

for i in xrange(len(sizes)-1):

current_size = sizes[i]

next_size = sizes[i+1]

if current_size > maximum >= next_size:

return next_size