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#!/system/xbin/bash
#
# Copyright (C) 2017 Jeremy Rand <jeremy@veclabs.net>
# Partially based on code by Wolfgang Wiedmeyer <wolfgit@wiedmeyer.de> and Filippo Fil Bergamo
#
# This file is part of "Replicant Renderer Switcher", a set of shell scripts to switch between
# the Android Software Renderer and the llvmpipe renderer in Replicant.
#
# Replicant Renderer Switcher is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# Replicant Renderer Switcher is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
set -euf -o pipefail
usage()
{
echo "Usage: graphics.sh [faster|compatible]"
echo "Examples:"
echo "graphics.sh faster"
echo "|-> Uses Android's libagl"
echo " which is faster"
echo " but some applications"
echo " like icecat won't work"
echo "graphics.sh compatible"
echo "|-> Uses llvmpipe"
echo " which is slower"
echo " but more compatible"
exit 1
}
check_permissions()
{
new_renderer="$1"
root_access="$(getprop persist.sys.root_access)"
uid="$(id -u)"
# 0: Root access: Disabled, 2: Root access: ADB only
# For both the terminal application and ADB we have something
# like that:
# shell@i9100:/ $ su
# 255|shell@i9100:/ $
# 1: Root access: Apps only
# From ADB:
# shell@i9100:/ $ su
# Permission denied
# 1|shell@i9100:/ $
# From the terminal application
# u0_a51@i9100:/ $ su
# root@i9100:/ #
if [ "${uid}" != "0" ] ; then
echo ""
echo "This script requires root."
echo "To give it root:"
case "${root_access}" in
"0"|"1"|"2")
echo "- Go in Settings"
echo "- Go in Developer options"
echo "- Select Root access"
echo "- Set it to \"Apps and ADB\""
;;
esac
echo "- Run these 2 commands:"
echo " su"
echo " graphics.sh ${new_renderer}"
exit 1
fi
}
graphics()
{
new_renderer="$1" # libagl || llvmpipe
check_permissions "${new_renderer}"
grep -q "ro.libagl=0" /system/build.prop && \
old_renderer="llvmpipe" || old_renderer="libagl"
if [ "${old_renderer}" == "${new_renderer}" ] ; then
if [ "${old_renderer}" = "libagl" ] ; then
echo "Android software renderer is already enabled!"
else
echo "${old_renderer} renderer is already enabled!"
fi
exit 1
fi
echo "Remounting system partition as writable..."
mount -o rw,remount /system
if [ "${new_renderer}" == "libagl" ] ; then
echo "Enabling Android software renderer..."
sed "s/ro.libagl=0/ro.libagl=1/" -i /system/build.prop
else
echo "Enabling ${new_renderer}..."
sed "s/ro.libagl=1/ro.libagl=0/" -i /system/build.prop
fi
echo "Syncing filesystem..."
sync
sync
echo "Remounting system partition as read-only..."
mount -o ro,remount /system
echo "Syncing filesystem..."
sync
sync
if [ "${new_renderer}" == "libagl" ] ; then
echo "Android software renderer will be enabled after we reboot now..."
else
echo "${new_renderer} will be enabled after we reboot now..."
fi
# https://android.stackexchange.com/a/139139
am start -a android.intent.action.REBOOT
}
if [ $# -ne 1 ] ; then
usage
fi
if [ "$1" = "faster" ] ; then
graphics libagl
elif [ "$1" = "compatible" ] ;then
graphics llvmpipe
else
usage
fi
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