#!/bin/sh
# -*- Mode: shell-script -*-
# Copyright (C) 2002 by Chmouel Boudjnah <chmouel@mandrakesoft.com>
# Redistribution of this file is permitted under the terms of the GNU 
# Public License (GPL)
# $Id$

: ${splash_dir=/usr/share/bootsplash}

[[ -f /etc/sysconfig/bootsplash ]] && source /etc/sysconfig/bootsplash
[[ -z $THEME ]] && THEME=Mandrake

initrd_file=$1

[[ -z $initrd_file ]] && {
    echo "You need to specify a initrd file as argument"
    exit 1;
}

vgamode=$2

if [[ -z $vgamode || $vgamode == auto ]];then
    vgamode=$( $splash_dir/scripts/detect-resolution )
fi

if [[ $vgamode == 800* ]];then
    resolution=800x600
elif [[ $vgamode == 1024* ]];then
    resolution=1024x768
elif [[ $vgamode == 1280* ]];then
    resolution=1280x1024
fi

if [[ -f $splash_dir/themes/$THEME/images/bootsplash-$resolution.jpg && -f $splash_dir/themes/$THEME/cfg/bootsplash-$resolution.cfg ]];then
    image=$splash_dir/themes/$THEME/images/bootsplash-$resolution.jpg
    config=$splash_dir/themes/$THEME/cfg/bootsplash-$resolution.cfg
fi

if [[ -n $image ]];then
    if [[ -z $config ]];then
	echo "Can't find a config files for $resolution";
	exit 1;
    fi
else #no image
    echo "Can't find images for $resolution";
fi

# From SuSe mk_initrd script
function out_byte()
{
 	let x=$1
	echo -en "`printf \\\\%o $x`"
}
function write_int()
{
	let tmp1=($1 & 255)
	let tmp2=($1>>8)
	let tmp2=($tmp2&255)
	let tmp3=($1>>16)
	let tmp3=($tmp3&255)
	let tmp4=($1>>24)
	let tmp4=($tmp4&255)
	out_byte $tmp1
	out_byte $tmp2
	out_byte $tmp3
	out_byte $tmp4
}
function write_short()
{
	let tmp1=($1>>8)
	let tmp2=($1&0xff)
	out_byte $tmp2
	out_byte $tmp1
}

function write_header()
{
  	# write signature
	echo -n "BOOTSPL1"
	# write text x coordinate
	write_short $1
	# write text y coordinate
	write_short $2
	# write text width
	write_short $3
	# write text height
	write_short $4
	# write file length
	write_int $5
}

source $config
size=`wc -c<$image`
write_header $tx $ty $tw $th $size >> $initrd_file
cat $image >> $initrd_file