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#!/bin/sh
# Copyright 2015 Google Inc.
#
# Use of this source code is governed by a BSD-style license that can be
# found in the LICENSE file.
#
# Before this can be used, the device must be rooted and the filesystem must be writable by Skia
# - These steps are necessary once after flashing to enable capture -
# adb root
# adb remount
# adb reboot
if [ -z "$1" ]; then
printf 'Usage:\n skp-capture.sh PACKAGE_NAME OPTIONAL_FRAME_COUNT\n\n'
printf "Use \`adb shell 'pm list packages'\` to get a listing.\n\n"
exit 1
fi
if ! command -v adb > /dev/null 2>&1; then
if [ -x "${ANDROID_SDK_ROOT}/platform-tools/adb" ]; then
adb() {
"${ANDROID_SDK_ROOT}/platform-tools/adb" "$@"
}
else
echo 'adb missing'
exit 2
fi
fi
phase1_timeout_seconds=60
phase2_timeout_seconds=300
package="$1"
extension="skp"
if (( "$2" > 1 )); then # 2nd arg is number of frames
extension="mskp" # use different extension for multi frame files.
fi
filename="$(date '+%H%M%S').${extension}"
remote_path="/data/data/${package}/cache/${filename}"
local_path_prefix="$(date '+%Y-%m-%d_%H%M%S')_${package}"
local_path="${local_path_prefix}.${extension}"
enable_capture_key='debug.hwui.capture_skp_enabled'
enable_capture_value=$(adb shell "getprop '${enable_capture_key}'")
# TODO(nifong): check if filesystem is writable here with "avbctl get-verity"
# result will either start with "verity is disabled" or "verity is enabled"
if [ -z "$enable_capture_value" ]; then
printf 'debug.hwui.capture_skp_enabled was found to be disabled, enabling it now.\n'
printf " restart the process you want to capture on the device, then retry this script.\n\n"
adb shell "setprop '${enable_capture_key}' true"
exit 1
fi
if [ ! -z "$2" ]; then
adb shell "setprop 'debug.hwui.capture_skp_frames' $2"
fi
filename_key='debug.hwui.skp_filename'
adb shell "setprop '${filename_key}' '${remote_path}'"
spin() {
case "$spin" in
1) printf '\b|';;
2) printf '\b\\';;
3) printf '\b-';;
*) printf '\b/';;
esac
spin=$(( ( ${spin:-0} + 1 ) % 4 ))
sleep $1
}
banner() {
printf '\n=====================\n'
printf ' %s' "$*"
printf '\n=====================\n'
}
banner '...WAITING FOR APP INTERACTION...'
# Waiting for nonzero file is an indication that the pipeline has both opened the file and written
# the header. With multiple frames this does not occur until the last frame has been recorded,
# so we continue to show the "waiting for app interaction" message as long as the app still requires
# interaction to draw more frames.
adb_test_file_nonzero() {
# grab first byte of `wc -c` output
X="$(adb shell "wc -c \"$1\" 2> /dev/null | dd bs=1 count=1 2> /dev/null")"
test "$X" && test "$X" -ne 0
}
timeout=$(( $(date +%s) + $phase1_timeout_seconds))
while ! adb_test_file_nonzero "$remote_path"; do
spin 0.05
if [ $(date +%s) -gt $timeout ] ; then
printf '\bTimed out.\n'
adb shell "setprop '${filename_key}' ''"
exit 3
fi
done
printf '\b'
# Disable further capturing
adb shell "setprop '${filename_key}' ''"
banner '...SAVING...'
# return the size of a file in bytes
adb_filesize() {
adb shell "wc -c \"$1\"" 2> /dev/null | awk '{print $1}'
}
timeout=$(( $(date +%s) + $phase2_timeout_seconds))
last_size='0' # output of last size check command
unstable=true # false once the file size stops changing
counter=0 # used to perform size check only 1/sec though we update spinner 20/sec
# loop until the file size is unchanged for 1 second.
while [ $unstable != 0 ] ; do
spin 0.05
counter=$(( $counter+1 ))
if ! (( $counter % 20)) ; then
new_size=$(adb_filesize "$remote_path")
unstable=$(($(adb_filesize "$remote_path") != last_size))
last_size=$new_size
fi
if [ $(date +%s) -gt $timeout ] ; then
printf '\bTimed out.\n'
adb shell "setprop '${filename_key}' ''"
exit 3
fi
done
printf '\b'
printf "SKP file serialized: %s\n" $(echo $last_size | numfmt --to=iec)
i=0; while [ $i -lt 10 ]; do spin 0.10; i=$(($i + 1)); done; echo
adb pull "$remote_path" "$local_path"
if ! [ -f "$local_path" ] ; then
printf "something went wrong with `adb pull`."
exit 4
fi
adb shell rm "$remote_path"
printf '\nSKP saved to file:\n %s\n\n' "$local_path"
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