#!/bin/bash

#

# This script generates 'WebP.framework' and 'WebPDecoder.framework'. An iOS

# app can decode WebP images by including 'WebPDecoder.framework' and both

# encode and decode WebP images by including 'WebP.framework'.

#

# Run ./iosbuild.sh to generate the frameworks under the current directory

# (the previous build will be erased if it exists).

#

# This script is inspired by the build script written by Carson McDonald.

# (http://www.ioncannon.net/programming/1483/using-webp-to-reduce-native-ios-app-size/).

set -e

# Extract the latest SDK version from the final field of the form: iphoneosX.Y

readonly SDK=$(xcodebuild -showsdks \

| grep iphoneos | sort | tail -n 1 | awk '{print substr($NF, 9)}'

)

# Extract Xcode version.

readonly XCODE=$(xcodebuild -version | grep Xcode | cut -d " " -f2)

if [[ -z "${XCODE}" ]]; then

echo "Xcode not available"

exit 1

fi

readonly OLDPATH=${PATH}

# Add iPhoneOS-V6 to the list of platforms below if you need armv6 support.

# Note that iPhoneOS-V6 support is not available with the iOS6 SDK.

PLATFORMS="iPhoneSimulator iPhoneSimulator64"

PLATFORMS+=" iPhoneOS-V7 iPhoneOS-V7s iPhoneOS-V7-arm64"

readonly PLATFORMS

readonly SRCDIR=$(dirname $0)

readonly TOPDIR=$(pwd)

readonly BUILDDIR="${TOPDIR}/iosbuild"

readonly TARGETDIR="${TOPDIR}/WebP.framework"

readonly DECTARGETDIR="${TOPDIR}/WebPDecoder.framework"

readonly DEVELOPER=$(xcode-select --print-path)

readonly PLATFORMSROOT="${DEVELOPER}/Platforms"

readonly LIPO=$(xcrun -sdk iphoneos${SDK} -find lipo)

LIBLIST=''

DECLIBLIST=''

if [[ -z "${SDK}" ]]; then

echo "iOS SDK not available"

exit 1

elif [[ ${SDK%%.*} -gt 8 ]]; then

EXTRA_CFLAGS="-fembed-bitcode"

elif [[ ${SDK} < 6.0 ]]; then

echo "You need iOS SDK version 6.0 or above"

exit 1

else

echo "iOS SDK Version ${SDK}"

fi

rm -rf ${BUILDDIR} ${TARGETDIR} ${DECTARGETDIR}

mkdir -p ${BUILDDIR} ${TARGETDIR}/Headers/ ${DECTARGETDIR}/Headers/

if [[ ! -e ${SRCDIR}/configure ]]; then

if ! (cd ${SRCDIR} && sh autogen.sh); then

cat <<EOT

Error creating configure script!

This script requires the autoconf/automake and libtool to build. MacPorts can

be used to obtain these:

http://www.macports.org/install.php

EOT

exit 1

fi

fi

for PLATFORM in ${PLATFORMS}; do

ARCH2=""

if [[ "${PLATFORM}" == "iPhoneOS-V7-arm64" ]]; then

PLATFORM="iPhoneOS"

ARCH="aarch64"

ARCH2="arm64"

elif [[ "${PLATFORM}" == "iPhoneOS-V7s" ]]; then

PLATFORM="iPhoneOS"

ARCH="armv7s"

elif [[ "${PLATFORM}" == "iPhoneOS-V7" ]]; then

PLATFORM="iPhoneOS"

ARCH="armv7"

elif [[ "${PLATFORM}" == "iPhoneOS-V6" ]]; then

PLATFORM="iPhoneOS"

ARCH="armv6"

elif [[ "${PLATFORM}" == "iPhoneSimulator64" ]]; then

PLATFORM="iPhoneSimulator"

ARCH="x86_64"

else

ARCH="i386"

fi

ROOTDIR="${BUILDDIR}/${PLATFORM}-${SDK}-${ARCH}"

mkdir -p "${ROOTDIR}"

DEVROOT="${DEVELOPER}/Toolchains/XcodeDefault.xctoolchain"

SDKROOT="${PLATFORMSROOT}/"

SDKROOT+="${PLATFORM}.platform/Developer/SDKs/${PLATFORM}${SDK}.sdk/"

CFLAGS="-arch ${ARCH2:-${ARCH}} -pipe -isysroot ${SDKROOT} -O3 -DNDEBUG"

CFLAGS+=" -miphoneos-version-min=6.0 ${EXTRA_CFLAGS}"

set -x

export PATH="${DEVROOT}/usr/bin:${OLDPATH}"

${SRCDIR}/configure --host=${ARCH}-apple-darwin --prefix=${ROOTDIR} \

--build=$(${SRCDIR}/config.guess) \

--disable-shared --enable-static \

--enable-libwebpdecoder --enable-swap-16bit-csp \

CFLAGS="${CFLAGS}"

set +x

# run make only in the src/ directory to create libwebp.a/libwebpdecoder.a

cd src/

make V=0

make install

LIBLIST+=" ${ROOTDIR}/lib/libwebp.a"

DECLIBLIST+=" ${ROOTDIR}/lib/libwebpdecoder.a"

make clean

cd ..

export PATH=${OLDPATH}

done

cp -a ${SRCDIR}/src/webp/{decode,encode,types}.h ${TARGETDIR}/Headers/

${LIPO} -create ${LIBLIST} -output ${TARGETDIR}/WebP

cp -a ${SRCDIR}/src/webp/{decode,types}.h ${DECTARGETDIR}/Headers/

${LIPO} -create ${DECLIBLIST} -output ${DECTARGETDIR}/WebPDecoder