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# This script captures MSKP files from RenderEngine in a connected device.
# this only functions when RenderEngine uses the Skia backend.
# it triggers code in SkiaCapture.cpp.
# for a newly flashed device, perform first time steps with
# record.sh rootandsetup
# record all frames that RenderEngine handles over the span of 2 seconds.
# record.sh 2000
if [ -z "$1" ]; then
printf 'Usage:\n record.sh rootandsetup\n'
printf ' record.sh MILLISECONDS\n\n'
exit 1
elif [ "$1" == "rootandsetup" ]; then
# first time use requires these changes
adb root
adb shell setenforce 0
adb shell setprop debug.renderengine.backend "skiaglthreaded"
adb shell stop
adb shell start
exit 1;
fi
check_permission() {
adb shell getenforce
}
mode=$(check_permission)
if [ "$mode" != "Permissive" ]; then
echo "Cannot write to disk from RenderEngine. run 'record.sh rootandsetup'"
exit 5
fi
# record frames for some number of milliseconds.
adb shell setprop debug.renderengine.capture_skia_ms $1
# give the device time to both record, and starting writing the file.
# Total time needed to write the file depends on how much data was recorded.
# the loop at the end waits for this.
sleep $(($1 / 1000 + 4));
# There is no guarantee that at least one frame passed through renderengine during that time
# but as far as I know it always at least writes a 0-byte file with a new name, unless it crashes
# the process it is recording.
# /data/user/re_skiacapture_56204430551705.mskp
spin() {
case "$spin" in
1) printf '\b|';;
2) printf '\b\\';;
3) printf '\b-';;
*) printf '\b/';;
esac
spin=$(( ( ${spin:-0} + 1 ) % 4 ))
sleep $1
}
local_path=~/Downloads/
get_filename() {
adb shell getprop debug.renderengine.capture_filename
}
remote_path=""
counter=0 # used to check only 1/sec though we update spinner 20/sec
while [ -z $remote_path ] ; do
spin 0.05
counter=$(( $counter+1 ))
if ! (( $counter % 20)) ; then
remote_path=$(get_filename)
fi
done
printf '\b'
printf "MSKP file serialized to: $remote_path\n"
adb_pull_cmd="adb pull $remote_path $local_path"
echo $adb_pull_cmd
$adb_pull_cmd
adb shell rm "$remote_path"
printf 'SKP saved to %s\n\n' "$local_path"
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