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#!/bin/bash -e
# Copyright (c) 2010 The Chromium OS Authors. All rights reserved.
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# This script searches the directory tree passed in as the parameter for
# bmp_*.fv files, figures out the FWID strings from files' names, verifies the
# FWIDs' integrity (by recalculating the CRC included in the FWID string) and
# then rebuilds the bitmaps with the appropriate text and target specific
# geometry.
#
# Given a string "<prefix>_<el1>_<el2>_.._<eln>_<suffix>" print string
# '<el1> <el2> .. <eln>', i.e. <prefix>_ and _<suffix> dropped and underscores
# replaced with spaces.
get_elements() {
echo $1 | awk 'BEGIN {FS="_"}; {
x = 2;
do {
printf "%s ", $x;
x += 1
} while (x < (NF - 1))
printf "%s", $(NF-1);
}'
}
# Concatenate input parameters into a space separated string, calculate the
# string's CRC32 and print the last four hex digits of the crc.
signer() {
python -c "import sys,zlib;
me=' '.join(sys.argv[1:]);
print ('%04u'%(zlib.crc32(me)&0xffffffffL))[-4:]" $1
}
if [ "$#" != "1" -o ! -d "$1" ]; then
echo "One parameter is required, the path to the chromeos release tree" >&2
exit 1
fi
tree=$(readlink -f $1)
cd $(dirname "$0")
for f in $(find "${tree}" -type f -name 'bmp_*_[0-9]*.fv'); do
filename=$(basename "$f")
elements="$(get_elements $filename)"
signature=$(signer "${elements}")
# Rebuild file name to verify CRC.
comp_name=bmp_${elements// /_}_${signature}.fv
if [ "${filename}" != "${comp_name}" ]; then
echo "skipping ${filename} (crc mismatch with ${comp_name})"
continue
fi
echo "Processing ${filename}"
case "${elements}" in
(*ACER*) geometry='1366x768'
;;
(*MARIO*) geometry='1280x800'
;;
(*) echo "skipping ${filename}, unknown target geometry"
echo
continue
;;
esac
./make_bmp_images.sh "${elements} ${signature}" "${geometry}" "x86"
echo
done
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