#!/bin/sh -e

# Copyright (c) 2015 The crouton Authors. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file.

if [ "${TARGETNOINSTALL:-c}" = 'c' ]; then

if grep -q 'SAMSUNG EXYNOS' /proc/cpuinfo && [ ! -f /sbin/frecon ]; then

error 1 'xorg target does not work on Samsung ARM devices.'

fi

fi

REQUIRES='audio'

PROVIDES='x11'

DESCRIPTION='X.Org X11 backend. Enables GPU acceleration on supported platforms.'

CHROOTBIN='croutoncycle croutontriggerd croutonxinitrc-wrapper setres xinit'

CHROOTETC='xbindkeysrc.scm xorg-intel-sna.conf xserverrc xserverrc-xorg xserverrc-local.example'

. "${TARGETSDIR:="$PWD"}/common"

### Append to prepare.sh:

XMETHOD="${XMETHOD:-xorg}"

# Migration from ambiguous XMETHOD

rm -f '/etc/crouton/xserverrc-x11'

# Figure out what we need on this system

# Freon?

freon=''

if [ ! -f "/sys/class/tty/tty0/active" ]; then

freon='y'

fi

# Pull in backported Xorg when possible on precise to support newer hardware

backport=''

if release -eq precise; then

if [ "${ARCH#arm}" = "$ARCH" ]; then

# Note: lts-trusty mesa requires kernel version >=3.6

if ! uname -r | grep -q "^3.4."; then

backport='-lts-trusty'

fi

else

# ARM only offers quantal backport at the moment

backport='-lts-quantal'

fi

fi

# Intel?

inteldriver=''

intelhasfbc=''

pinmesa=''

intelfbcsupport='y'

if [ "${ARCH#arm}" = "$ARCH" ]; then

inteldriver="xserver-xorg-video-intel$backport"

# If the system has an Intel FBC-capable video card but has too old a driver

# to support the chipset, we'll need to disable hardware acceleration.

if grep -q 1 '/sys/module/i915/parameters/i915_enable_fbc' 2>/dev/null; then

intelhasfbc=y

if release -le wheezy -le sana; then

intelfbcsupport=''

fi

fi

# On saucy onwards, if kernel version is 3.4, manually pin down old mesa

# libraries, as new ones require version >=3.6 (see issue #704).

# This is only required on non-Atom Intel chipsets (Atom uses i915 dri driver)

if release -ge saucy && uname -r | grep -q "^3.4." &&

! grep -q 0xa0 /sys/class/graphics/fb0/device/device; then

pinmesa='y'

fi

# Unhold xserver-xorg-video-intel, modification will be reapplied later.

apt-mark unhold "$inteldriver" 2>/dev/null || true

fi

# Catalog relevant and irrelevant video drivers

# Debian sid has modesetting built into xserver-xorg-core

fbdev="xserver-xorg-video-fbdev$backport"

modesetting="xserver-xorg-video-modesetting$backport,debian~sid+ubuntu~vivid="

installvideodrivers=''

removevideodrivers=''

if [ -n "$freon" ]; then

installvideodrivers="$modesetting"

removevideodrivers="$fbdev"

else

installvideodrivers="$fbdev"

fi

if [ -n "$inteldriver" ]; then

# If we need SNA (for fbc) but don't have it, don't install intel

if [ -z "$intelhasfbc" -o -n "$intelfbcsupport" ]; then

installvideodrivers="$installvideodrivers $inteldriver"

else

removevideodrivers="$removevideodrivers $inteldriver"

fi

fi

# On Freon, we need crazy xorg hacks

if [ -n "$freon" ]; then

compile freon '-ldl' so

fi

# Pin precise's version of mesa if necessary

pinfile='/etc/apt/preferences.d/precise-mesa-pin'

pinlist='/etc/apt/sources.list.d/precise.list'

pindummypkg='libwayland-egl1-dummy'

if [ -n "$pinmesa" ]; then

# Create a dummy libwayland-egl1 package, to satisfy dependencies

# (the libraries are actually provided by libegl1-mesa-drivers in precise)

install --minimal --asdeps equivs

DEBTMP="`mktemp -d crouton.XXXXXX --tmpdir=/tmp`"

addtrap "rm -rf --one-file-system '$DEBTMP'"

( cd "$DEBTMP"; equivs-build - ) <<END

Section: misc

Priority: optional

Standards-Version: 3.9.2

Package: $pindummypkg

Version: 8.0.4

Depends: libegl1-mesa-drivers

Provides: libwayland-egl1

Description: Dummy package providing libwayland-egl1

END

# Add precise package sources

mirror="`detect_mirror`"

cat > "$pinlist" <<END

deb $mirror precise main

deb $mirror precise-updates main

deb $mirror precise-security main

END

cat > "$pinfile" <<END

# Do not install any packages from precise by default

Package: *

Pin: release n=precise

Pin-Priority: -10

# Install mesa packages and their dependencies from precise

Package: libegl1-mesa:* libegl1-mesa-dbg:* libegl1-mesa-dev:* \

libegl1-mesa-drivers:* libegl1-mesa-drivers-dbg:* \

libgl1-mesa-dev:* libgl1-mesa-dri:* libgl1-mesa-dri-dbg:* \

libgl1-mesa-glx:* libgl1-mesa-glx-dbg:* \

libglapi-mesa:* libglapi-mesa-dbg:* \

libgles1-mesa:* libgles1-mesa-dbg:* libgles1-mesa-dev:* \

libgles2-mesa:* libgles2-mesa-dbg:* libgles2-mesa-dev:* \

libdrm-nouveau1a:* libllvm3.0:* libudev0:*

Pin: release n=precise

Pin-Priority: 1100

END

# Fetch new package sources

apt-get update || true

# Forcibly replace libwayland-egl1-mesa by libwayland-egl1-dummy

# (dpkg -r does not fail if package does not exist)

dpkg -r --force-depends libwayland-egl1-mesa libwayland-egl1-mesa:i386

dpkg -i --force-depends "$DEBTMP"/libwayland-egl1-dummy_*_all.deb

# Downgrade packages, -f is needed as dependencies are broken

# This happens to install python2.7-minimal as well, pulled in by a wrong

# dependency of ubuntu-minimal-1.267 (precise), which we did not install.

# Looks like an apt bug, I guess we can live with that.

apt-get -y --force-yes --no-install-recommends dist-upgrade -f

elif [ -f "$pinfile" -o -f "$pinlist" ]; then

# No longer need the pin; remove it

rm -f "$pinfile" "$pinlist"

apt-get update || true

dpkg -r --force-depends "$pindummypkg"

apt-get -y --force-yes --no-install-recommends dist-upgrade -f

fi

# Install backported xorg instead of the default one

if [ -n "$backport" ]; then

# We still install xorg later to pull in its dependencies

install --minimal "xserver-xorg$backport" "libgl1-mesa-glx$backport" \

"libegl1-mesa$backport" "libgles2-mesa$backport" \

"xserver-xorg-input-synaptics$backport" $installvideodrivers

fi

# Install xorg, no video drivers

if [ -z "$inteldriver" -a -n "$backport" ] && release -eq precise; then

# xorg is packaged wrong on ARM and conflicts with xserver-xorg-lts-quantal

# so replace it with something not broken

install_dummy xorg -- xserver-xorg$backport libgl1-mesa-glx$backport \

libgl1-mesa-dri$backport libglu1-mesa xfonts-base x11-apps \

x11-session-utils x11-utils x11-xfs-utils x11-xkb-utils \

x11-xserver-utils xauth xinit xfonts-utils xkb-data xorg-docs-core \

xterm x11-common xinput

else

install xorg $installvideodrivers -- xserver-xorg-video-all$backport

fi

# Remove bad video drivers

if [ -n "$removevideodrivers" ]; then

remove $removevideodrivers

fi

# If this is a system with framebuffer compression, we need SNA+tearfree

xorgconf='/usr/share/X11/xorg.conf.d/20-crouton-intel-sna.conf'

if [ -n "$intelhasfbc" -a -n "$intelfbcsupport" ]; then

mkdir -p "${xorgconf%/*}"

ln -sfT /etc/crouton/xorg-intel-sna.conf "$xorgconf"

else

# In case this got moved to a different system, delete the config

rm -f "$xorgconf"

fi

# Fix launching X11 from inside crosh (user doesn't own a TTY)

sed -i 's/allowed_users=.*/allowed_users=anybody/' '/etc/X11/Xwrapper.config'

inteldrv='/usr/lib/xorg/modules/drivers/intel_drv.so'

if [ -n "$freon" -a -e "$inteldrv" ]; then

# Modify the Intel driver to call getuid0 (provided by croutonfreon.so)

# instead of geteuid, to force DRM master setting/dropping.

offset="`grep -F -m 1 -boa 'geteuid' "$inteldrv" 2>/dev/null || true`"

if [ -n "$offset" ]; then

echo -n 'getuid0' | dd seek="${offset%:*}" bs=1 of="$inteldrv" \

conv=notrunc,nocreat 2>/dev/null

fi

if grep -F -q -a 'getuid0' "$inteldrv" 2>/dev/null; then

# Hold xserver-xorg-video-intel to make sure that the modification

# (which may have been made in a previous update) does not get erased.

apt-mark hold "$inteldriver"

fi

fi

TIPS="$TIPS

You can flip through your running chroot desktops and Chromium OS by hitting

Ctrl+Alt+Shift+Back and Ctrl+Alt+Shift+Forward.

"

### append x11-common