#!/bin/bash

#+--------------------------------------------------------------------------------------------
#|Description:  This shell script used download and compile libpng for ARM
#|     Author:  GuoWenxue <guowenxue@gmail.com>
#|  ChangeLog:
#|           1, Initialize 1.0.0 on 2011.04.12
#+--------------------------------------------------------------------------------------------

PRJ_PATH=`pwd`
PREFIX_PATH=`pwd`/../install/

LYFTP_SRC=http://master.weike-iot.com:2211/src/

CROSS_COMPILE=/opt/gcc-aarch32-10.3-2021.07/bin/arm-none-linux-gnueabihf-

function msg_banner()
{
    echo ""
    echo "+-----------------------------------------------------------------------"
    echo "|  $1 "
    echo "+-----------------------------------------------------------------------"
    echo ""
}

function check_result()
{
    if [ $? != 0 ] ; then
       echo ""
       echo "+-----------------------------------------------------------------------"
       echo "|  $1 "
       echo "+-----------------------------------------------------------------------"
       echo ""
       exit ;
    fi
}

function export_cross()
{
    # export cross toolchain
    export CC=${CROSS_COMPILE}gcc
    export AS=${CROSS_COMPILE}as
    export AR=${CROSS_COMPILE}ar
    export LD=${CROSS_COMPILE}ld
    export NM=${CROSS_COMPILE}nm
    export RANLIB=${CROSS_COMPILE}ranlib
    export OBJDUMP=${CROSS_COMPILE}objdump
    export STRIP=${CROSS_COMPILE}strip

    # export cross configure 
    export CONFIG_CROSS=" --build=i686-pc-linux --host=arm-linux "

    # Clear LDFLAGS and CFLAGS
    export LDFLAGS=
    export CFLAGS=
}


function compile_png()
{
    SRC_NAME=libpng-1.6.37
    PACK_SUFIX=tar.gz

    if [ -f ${PREFIX_PATH}/lib/libpng.a ] ; then
        msg_banner "$SRC_NAME already compile and installed"
        return 0;
    fi

    msg_banner "Start cross compile $SRC_NAME "

    if [ ! -f ${SRC_NAME}.${PACK_SUFIX} ] ; then
        #wget https://nchc.dl.sourceforge.net/project/libpng/libpng16/1.6.37/${SRC_NAME}.${PACK_SUFIX}
        wget ${LYFTP_SRC}/${SRC_NAME}.${PACK_SUFIX}
        check_result "ERROR: download ${SRC_NAME} failure"
    fi

    tar -xzf ${SRC_NAME}.${PACK_SUFIX}
    cd ${SRC_NAME}

    export CFLAGS=" -I${PREFIX_PATH}/include" 
    export CPPFLAGS=" -I${PREFIX_PATH}/include" 
    export LDFLAGS=" -L${PREFIX_PATH}/lib" 
    ./configure --prefix=${PREFIX_PATH} ${CONFIG_CROSS} --enable-static  --enable-shared --enable-arm-neon 
    check_result "ERROR: configure ${SRC_NAME} failure"

    make && make install
    check_result "ERROR: compile ${SRC_NAME} failure"

    cd -
}

export_cross

if [ ! -f ${PREFIX_PATH}/lib/libz.a ] ; then 
    cd ../zlib
    ./build.sh
    cd -
fi

compile_png