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#!/bin/bash
#
# This script generates 'WebP.framework' and 'WebPDecoder.framework',
# 'WebPDemux.framework' and 'WebPMux.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.
# (https://www.ioncannon.net/programming/1483/using-webp-to-reduce-native-ios-app-size/).
set -e
# Set this variable based on the desired minimum deployment target.
readonly IOS_MIN_VERSION=6.0
# 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="${TOPDIR}/WebPDecoder.framework"
readonly MUXTARGETDIR="${TOPDIR}/WebPMux.framework"
readonly DEMUXTARGETDIR="${TOPDIR}/WebPDemux.framework"
readonly DEVELOPER=$(xcode-select --print-path)
readonly PLATFORMSROOT="${DEVELOPER}/Platforms"
readonly LIPO=$(xcrun -sdk iphoneos${SDK} -find lipo)
LIBLIST=''
DECLIBLIST=''
MUXLIBLIST=''
DEMUXLIBLIST=''
if [[ -z "${SDK}" ]]; then
echo "iOS SDK not available"
exit 1
elif [[ ${SDK%%.*} -gt 8 ]]; then
EXTRA_CFLAGS="-fembed-bitcode"
elif [[ ${SDK%%.*} -le 6 ]]; then
echo "You need iOS SDK version 6.0 or above"
exit 1
fi
echo "Xcode Version: ${XCODE}"
echo "iOS SDK Version: ${SDK}"
if [[ -e "${BUILDDIR}" || -e "${TARGETDIR}" || -e "${DECTARGETDIR}" \
|| -e "${MUXTARGETDIR}" || -e "${DEMUXTARGETDIR}" ]]; then
cat << EOF
WARNING: The following directories will be deleted:
WARNING: ${BUILDDIR}
WARNING: ${TARGETDIR}
WARNING: ${DECTARGETDIR}
WARNING: ${MUXTARGETDIR}
WARNING: ${DEMUXTARGETDIR}
WARNING: The build will continue in 5 seconds...
EOF
sleep 5
fi
rm -rf ${BUILDDIR} ${TARGETDIR} ${DECTARGETDIR} \
${MUXTARGETDIR} ${DEMUXTARGETDIR}
mkdir -p ${BUILDDIR} ${TARGETDIR}/Headers/ ${DECTARGETDIR}/Headers/ \
${MUXTARGETDIR}/Headers/ ${DEMUXTARGETDIR}/Headers/
if [[ ! -e ${SRCDIR}/configure ]]; then
if ! (cd ${SRCDIR} && sh autogen.sh); then
cat << EOF
Error creating configure script!
This script requires the autoconf/automake and libtool to build. MacPorts can
be used to obtain these:
https://www.macports.org/install.php
EOF
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 ${SDKROOT} -O3 -DNDEBUG"
CFLAGS+=" -miphoneos-version-min=${IOS_MIN_VERSION} ${EXTRA_CFLAGS}"
set -x
export PATH="${DEVROOT}/usr/bin:${OLDPATH}"
${SRCDIR}/configure --host=${ARCH}-apple-darwin --prefix=${ROOTDIR} \
--build=$(${SRCDIR}/config.guess) \
--disable-shared --enable-static \
--enable-libwebpdecoder --enable-swap-16bit-csp \
--enable-libwebpmux \
CFLAGS="${CFLAGS}"
set +x
# Build only the libraries, skip the examples.
make V=0 -C sharpyuv
make V=0 -C src install
LIBLIST+=" ${ROOTDIR}/lib/libwebp.a"
DECLIBLIST+=" ${ROOTDIR}/lib/libwebpdecoder.a"
MUXLIBLIST+=" ${ROOTDIR}/lib/libwebpmux.a"
DEMUXLIBLIST+=" ${ROOTDIR}/lib/libwebpdemux.a"
make clean
export PATH=${OLDPATH}
done
echo "LIBLIST = ${LIBLIST}"
cp -a ${SRCDIR}/src/webp/{decode,encode,types}.h ${TARGETDIR}/Headers/
${LIPO} -create ${LIBLIST} -output ${TARGETDIR}/WebP
echo "DECLIBLIST = ${DECLIBLIST}"
cp -a ${SRCDIR}/src/webp/{decode,types}.h ${DECTARGETDIR}/Headers/
${LIPO} -create ${DECLIBLIST} -output ${DECTARGETDIR}/WebPDecoder
echo "MUXLIBLIST = ${MUXLIBLIST}"
cp -a ${SRCDIR}/src/webp/{types,mux,mux_types}.h \
${MUXTARGETDIR}/Headers/
${LIPO} -create ${MUXLIBLIST} -output ${MUXTARGETDIR}/WebPMux
echo "DEMUXLIBLIST = ${DEMUXLIBLIST}"
cp -a ${SRCDIR}/src/webp/{decode,types,mux_types,demux}.h \
${DEMUXTARGETDIR}/Headers/
${LIPO} -create ${DEMUXLIBLIST} -output ${DEMUXTARGETDIR}/WebPDemux
echo "SUCCESS"
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