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# Copyright (C) 2011 The Android Open Source Project
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# See the License for the specific language governing permissions and
# limitations under the License.
"""Script to take a set of frames (PNG files) for a recovery
"installing" icon animation and turn it into a base image plus a set
of overlays, as needed by the recovery UI code. Run with the names of
all the input frames on the command line, in order."""
import sys
import Image
except ImportError:
print "This script requires the Python Imaging Library to be installed."
# Find the smallest box that contains all the pixels which change
# between images.
print "reading", sys.argv[1]
base =[1])
minmini = base.size[0]-1
maxmaxi = 0
minminj = base.size[1]-1
maxmaxj = 0
for top_name in sys.argv[2:]:
print "reading", top_name
top =
assert base.size == top.size
mini = base.size[0]-1
maxi = 0
minj = base.size[1]-1
maxj = 0
h, w = base.size
for j in range(w):
for i in range(h):
b = base.getpixel((i,j))
t = top.getpixel((i,j))
if b != t:
if i < mini: mini = i
if i > maxi: maxi = i
if j < minj: minj = j
if j > maxj: maxj = j
minmini = min(minmini, mini)
maxmaxi = max(maxmaxi, maxi)
minminj = min(minminj, minj)
maxmaxj = max(maxmaxj, maxj)
w = maxmaxi - minmini + 1
h = maxmaxj - minminj + 1
# Now write out an image containing just that box, for each frame.
for num, top_name in enumerate(sys.argv[1:]):
top =
out ="RGB", (w, h))
for i in range(w):
for j in range(h):
t = top.getpixel((i+minmini, j+minminj))
out.putpixel((i, j), t)
fn = "icon_installing_overlay%02d.png" % (num+1,)
print "saved", fn
# Write out the base icon, which is the first frame with that box
# blacked out (just to make the file smaller, since it's always
# displayed with one of the overlays on top of it).
for i in range(w):
for j in range(h):
base.putpixel((i+minmini, j+minminj), (0, 0, 0))
fn = "icon_installing.png"
print "saved", fn
# The device_ui_init() function needs to tell the recovery UI the
# position of the overlay box.
print "add this to your device_ui_init() function:"
print "-" * 40
print " ui_parameters->install_overlay_offset_x = %d;" % (minmini,)
print " ui_parameters->install_overlay_offset_y = %d;" % (minminj,)
print "-" * 40
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