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#!/bin/bash -i
# This script can be used to build PdfiumAndroid library (libjniPdfium) and its dependent libraries(libpng and libfreetype2).
export NDK_ROOT=/d/Android/ndk/28.2.13676358
export BUILD_ROOT="builddir"
rm -fr ${BUILD_ROOT}
# LIST OF ARCHS TO BE BUILT.
if [ -z "${BUILD_ARCHS}" ]; then
# If no environment variable is defined, use all archs.
BUILD_ARCHS="x86 armeabi-v7a x86_64 arm64-v8a"
fi
check_command_result() {
local exit_code=$?
local command=$1
echo "exit code = ${exit_code}"
if [ ${exit_code} -ne 0 ]; then
echo "${command} failed. Exiting."
exit 1
fi
}
build_libpng() {
rm -fr libpng
git clone https://github.com/pnggroup/libpng
cd libpng
git checkout v1.6.44
cd ..
for ABI in ${BUILD_ARCHS}; do
export BUILD_DIR=${BUILD_ROOT}/libpng/${ABI}
rm -fr ${BUILD_DIR} &&
cmake -G "Ninja" -B ${BUILD_DIR} -S libpng \
-DCMAKE_ANDROID_NDK=${NDK_ROOT} \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_ANDROID_ARCH_ABI=${ABI} \
-DBUILD_SHARED_LIBS:BOOL=true \
-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
-DANDROID_ABI=${ABI} \
-DCMAKE_SYSTEM_NAME=Android \
-DCMAKE_SHARED_LINKER_FLAGS="-Wl,-z,max-page-size=0x4000"
check_command_result "configuring libpng"
cmake --build ${BUILD_DIR} -j10
check_command_result "building libpng"
ls -lh ${BUILD_DIR}/*.so
cp ${BUILD_DIR}/libpng16.so src/main/jni/lib/${ABI}/libmodpng.so
done
}
build_libfreetype2() {
FREETYPE_VERSION=2.13.3
rm -fr freetype-${FREETYPE_VERSION}.tar.gz freetype-${FREETYPE_VERSION}
wget https://download.savannah.gnu.org/releases/freetype/freetype-${FREETYPE_VERSION}.tar.gz
tar -xvzf freetype-${FREETYPE_VERSION}.tar.gz
export SRC_DIR=freetype-${FREETYPE_VERSION}
for ABI in ${BUILD_ARCHS}; do
export BUILD_DIR=${BUILD_ROOT}/${SRC_DIR}/${ABI}
rm -fr ${BUILD_DIR} &&
cmake -G "Ninja" -B ${BUILD_DIR} -S ${SRC_DIR} \
-DCMAKE_ANDROID_NDK=${NDK_ROOT} \
-DCMAKE_BUILD_TYPE=Release \
-DCMAKE_ANDROID_ARCH_ABI=${ABI} \
-DBUILD_SHARED_LIBS:BOOL=true \
-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
-DANDROID_ABI=${ABI} \
-DCMAKE_SYSTEM_NAME=Android \
-DCMAKE_SHARED_LINKER_FLAGS="-Wl,-z,max-page-size=0x4000"
check_command_result "configuring freetype"
cmake --build ${BUILD_DIR} -j10
check_command_result "building freetype"
ls -lh ${BUILD_DIR}/*.so
cp ${BUILD_DIR}/libfreetype.so src/main/jni/lib/${ABI}/libmodft2.so
done
}
build_pdfiumAndroid() {
for ABI in ${BUILD_ARCHS}; do
cmake -G "Ninja" -B ${BUILD_ROOT}/pdfiumAndroid/${ABI}/ \
-S . \
-DCMAKE_BUILD_TYPE=Release \
-DANDROID_NDK=${NDK_ROOT} \
-DCMAKE_ANDROID_NDK=${NDK_ROOT} \
-DCMAKE_SYSTEM_NAME=Android \
-DCMAKE_ANDROID_ARCH_ABI=${ABI} \
-DANDROID_ABI=${ABI} \
-DANDROID_PLATFORM=android-26 \
-DANDROID_SUPPORT_FLEXIBLE_PAGE_SIZES=ON \
-DCMAKE_SHARED_LINKER_FLAGS="-Wl,-z,max-page-size=0x4000"
check_command_result "configuring pdfiumAndroid"
cmake --build ${BUILD_ROOT}/pdfiumAndroid/${ABI}/ -j10
check_command_result "building pdfiumAndroid"
# Copy the built libjniPdfium.so to the jni/lib directory for packaging
echo "Copying libjniPdfium.so for ${ABI}"
cp ${BUILD_ROOT}/pdfiumAndroid/${ABI}/libjniPdfium.so src/main/jni/lib/${ABI}/
# Copy the correct libc++_shared.so from the NDK for each ABI
echo "Copying libc++_shared.so for ${ABI}"
# Map ABI to target triple for NDK 28
case ${ABI} in
"arm64-v8a")
TARGET_TRIPLE="aarch64-linux-android"
;;
"armeabi-v7a")
TARGET_TRIPLE="arm-linux-androideabi"
;;
"x86")
TARGET_TRIPLE="i686-linux-android"
;;
"x86_64")
TARGET_TRIPLE="x86_64-linux-android"
;;
*)
echo "Unknown ABI: ${ABI}"
continue
;;
esac
# NDK 28 path structure
LIBCPP_PATH="$NDK_ROOT/toolchains/llvm/prebuilt/windows-x86_64/sysroot/usr/lib/${TARGET_TRIPLE}/libc++_shared.so"
if [ -f "$LIBCPP_PATH" ]; then
cp "$LIBCPP_PATH" src/main/jni/lib/${ABI}/
echo " ✓ Copied libc++_shared.so for ${ABI}"
else
echo " ✗ libc++_shared.so not found at: $LIBCPP_PATH"
fi
done
}
deploy_to_mega() {
local mega_path=$1
target_folder=${mega_path}/sdk/src/main/jniLibs
for ABI in ${BUILD_ARCHS}; do
cp -fv src/main/jni/lib/${ABI}/libmodpng.so ${target_folder}/${ABI}/
cp -fv src/main/jni/lib/${ABI}/libmodft2.so ${target_folder}/${ABI}/
cp -fv src/main/jni/lib/${ABI}/libmodpdfium.so ${target_folder}/${ABI}/
cp -fv src/main/jni/lib/${ABI}/libmodpdfium.so ${target_folder}/${ABI}/
cp -fv builddir/pdfiumAndroid/${ABI}/libjniPdfium.so ${target_folder}/${ABI}/
done
}
print_usage() {
echo "Build script for PdfiumAndroid library and its dependent libraries(libpng and libfreetype2)."
echo " And deploy the library to MEGA code directly."
echo "Usage: $0 [options]"
echo "Example 1: build everything and deploy to MEGA code"
echo " bash build.sh --build-png --build-freetype --deploy-to-mega /PATH/TO/MEGA/CODE"
echo "Example 2: build only pdfiumAndroid and deploy to MEGA code"
echo " bash build.sh --deploy-to-mega /PATH/TO/MEGA/CODE"
echo "Options:"
echo " --build-png [Optional] Build libpng"
echo " --build-freetype [Optional] Build libfreetype2"
echo " --deploy-to-mega <path> [Optional] Deploy to the specified MEGA code path"
echo " --help Display this help message"
}
# Parse optional parameters
BUILD_PNG=false
BUILD_FREETYPE=false
MEGA_CODE_PATH=""
for arg in "$@"; do
case $arg in
--build-png)
BUILD_PNG=true
shift
;;
--build-freetype)
BUILD_FREETYPE=true
shift
;;
--deploy-to-mega)
MEGA_CODE_PATH="$2"
shift 2
;;
--help)
print_usage
exit 0
;;
esac
done
# Call the functions based on the parameters
if [ "$BUILD_PNG" = true ]; then
echo "building libpng"
build_libpng
fi
if [ "$BUILD_FREETYPE" = true ]; then
echo "building freetype"
build_libfreetype2
fi
build_pdfiumAndroid
if [ -n "$MEGA_CODE_PATH" ]; then
if [ -d "$MEGA_CODE_PATH" ]; then
deploy_to_mega "$MEGA_CODE_PATH"
else
echo "Directory $MEGA_CODE_PATH does not exist."
exit 1
fi
fi
echo "Build finished Ok"