#!/bin/bash

# Copyright 2019-2020 Hunter Sezen California, USA
# Copyright 2024  Patrick J. Volkerding, Sebeka, MN, USA
# All rights reserved.
#
# Redistribution and use of this script, with or without modification, is
# permitted provided that the following conditions are met:
#
# 1. Redistributions of this script must retain the above copyright
#    notice, this list of conditions and the following disclaimer.
#
#  THIS SOFTWARE IS PROVIDED BY THE AUTHOR "AS IS" AND ANY EXPRESS OR IMPLIED
#  WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF
#  MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.  IN NO
#  EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
#  SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
#  PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
#  OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
#  WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
#  OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
#  ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.

# Modifications and name change 2026 by Eric Hameleers <alien@slackware.com>
# in order to compile VLC 3.x with support for libplacebo.

cd $(dirname $0) ; CWD=$(pwd)

PKGNAM=libplacebo5
SRCNAM=libplacebo
VERSION=${VERSION:-$(echo libplacebo-*.tar.?z | rev | cut -f 3- -d . | cut -f 1 -d- | rev)}
BUILD=${BUILD:-1}
TAG=${TAG:-""}

if [ -z "$ARCH" ]; then
  case "$( uname -m )" in
    i?86) ARCH=i686 ;;
    arm*) ARCH=arm ;;
       *) ARCH=$( uname -m ) ;;
  esac
fi

# If the variable PRINT_PACKAGE_NAME is set, then this script will report what
# the name of the created package would be, and then exit. This information
# could be useful to other scripts.
if [ ! -z "${PRINT_PACKAGE_NAME}" ]; then
  echo "$PKGNAM-$VERSION-$ARCH-$BUILD.txz"
  exit 0
fi

NUMJOBS=${NUMJOBS:-" -j$(expr $(nproc) + 1) "}

if [ "$ARCH" = "i686" ]; then
  SLKCFLAGS="-O2 -march=pentium4 -mtune=generic"
  SLKLDFLAGS=""; LIBDIRSUFFIX=""
elif [ "$ARCH" = "x86_64" ]; then
  SLKCFLAGS="-O2 -march=x86-64 -mtune=generic -fPIC"
  SLKLDFLAGS="-L/usr/lib64"; LIBDIRSUFFIX="64"
  LIBDIRSUFFIX="64"
else
  SLKCFLAGS="-O2"
  SLKLDFLAGS=""; LIBDIRSUFFIX=""
fi

TMP=${TMP:-/tmp}
PKG=$TMP/package-$PKGNAM

rm -rf $PKG
mkdir -p $TMP $PKG
cd $TMP
rm -rf $SRCNAM-$VERSION
tar xvf $CWD/$SRCNAM-$VERSION.tar.?z || exit 1
cd $SRCNAM-$VERSION || exit 1

# Fix build witn newer pysetuptools:
cat $CWD/patches/libplacebo_pysetuptools.patch | patch -p1 --verbose || exit 1

chown -R root:root .
find -L . \
 \( -perm 777 -o -perm 775 -o -perm 750 -o -perm 711 -o -perm 555 -o -perm 511 \) \
 -exec chmod 755 {} \+ -o \
 \( -perm 666 -o -perm 664 -o -perm 600 -o -perm 444 -o -perm 440 -o -perm 400 \) \
 -exec chmod 644 {} \+

# Configure, build, and install:
export CFLAGS="$SLKCFLAGS"
export CXXFLAGS="$SLKCFLAGS"
export LDFLAGS="$SLKLDFLAGS -lglslang"
mkdir meson-build
cd meson-build
meson setup \
  --prefix=/usr \
  --libdir=lib${LIBDIRSUFFIX} \
  --libexecdir=/usr/libexec \
  --bindir=/usr/bin \
  --sbindir=/usr/sbin \
  --includedir=/usr/include \
  --datadir=/usr/share \
  --mandir=/usr/man \
  --sysconfdir=/etc \
  --localstatedir=/var \
  --default-library=static \
  -Dbuildtype=release \
  -Dshaderc=disabled \
  -Dglslang=enabled \
  -Ddemos=false \
  -Dtests=false \
  .. || exit 1
  "${NINJA:=ninja}" $NUMJOBS || exit 1
  DESTDIR=$PKG $NINJA install || exit 1
cd ..

# Renaming where needed to allow co-existence with libplacebo:
# header files:
mkdir -p $PKG/usr/include/$PKGNAM
mv -i $PKG/usr/include/$SRCNAM $PKG/usr/include/$PKGNAM/
pushd $PKG/usr/lib$LIBDIRSUFFIX
  # static library:
  mv -i ${SRCNAM}.a ${PKGNAM}.a
  ## dynamic library:
  #find -type l | xargs rm
  #DYNLIB=$(find ${SRCNAM}.so*)
  #mv -i $DYNLIB ${PKGNAM}.${DYNLIB#*.}
  #ln -s ${PKGNAM}.${DYNLIB#*.}  ${PKGNAM}.so
popd
# pkgconfig file:
cat $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/${SRCNAM}.pc \
  | sed -e "s,\(includedir=\${prefix}/include\),\1/$PKGNAM," \
        -e "s,Name: $SRCNAM,Name: $PKGNAM," \
        -e "s,Libs: -L${libdir} -l$SRCNAM,Libs: -L${libdir} -l$PKGNAM," \
  > $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/${PKGNAM}.pc
rm $PKG/usr/lib$LIBDIRSUFFIX/pkgconfig/${SRCNAM}.pc

# Documentation:
mkdir -p $PKG/usr/doc/$PKGNAM-$VERSION
cp -a LICENSE* README* $PKG/usr/doc/$PKGNAM-$VERSION

# Add a package description:
mkdir -p $PKG/install
cat $CWD/slack-desc > $PKG/install/slack-desc

# Create the package:
cd $PKG
/sbin/makepkg -l y -c n $TMP/$PKGNAM-$VERSION-$ARCH-$BUILD$TAG.txz