1#!/bin/bash 2# Copyright 2018 Google LLC 3# 4# Use of this source code is governed by a BSD-style license that can be 5# found in the LICENSE file. 6 7set -ex 8 9BASE_DIR=`cd $(dirname ${BASH_SOURCE[0]}) && pwd` 10HTML_SHELL=$BASE_DIR/shell.html 11BUILD_DIR=${BUILD_DIR:="out/pathkit"} 12mkdir -p $BUILD_DIR 13# sometimes the .a files keep old symbols around - cleaning them out makes sure 14# we get a fresh build. 15rm -f $BUILD_DIR/*.a 16 17# This expects the environment variable EMSDK to be set 18if [[ ! -d $EMSDK ]]; then 19 echo "Be sure to set the EMSDK environment variable." 20 exit 1 21fi 22 23# Navigate to SKIA_HOME from where this file is located. 24pushd $BASE_DIR/../.. 25 26echo "Putting output in $BUILD_DIR (pwd = `pwd`)" 27 28# Run this from $SKIA_HOME, not from the directory this file is in. 29if [[ ! -d ./src ]]; then 30 echo "Cannot locate Skia source. Is the source checkout okay? Exiting." 31 exit 1 32fi 33 34if [[ $@ == *help* ]]; then 35 echo "By default, this script builds a production WASM build of PathKit." 36 echo "" 37 echo "It is put in ${BUILD_DIR}, configured by the BUILD_DIR environment" 38 echo "variable. Additionally, the EMSDK environment variable must be set." 39 echo "This script takes several optional parameters:" 40 echo " test = Make a build suitable for running tests or profiling" 41 echo " debug = Make a build suitable for debugging (defines SK_DEBUG)" 42 echo " asm.js = Build for asm.js instead of WASM (very experimental)" 43 echo " serve = starts a webserver allowing a user to navigate to" 44 echo " localhost:8000/pathkit.html to view the demo page." 45 exit 0 46fi 47 48 49# Use -O0 for larger builds (but generally quicker) 50# Use -Oz for (much slower, but smaller/faster) production builds 51export EMCC_CLOSURE_ARGS="--externs $BASE_DIR/externs.js " 52RELEASE_CONF="-Oz --closure 1 -DSK_RELEASE" 53# It is very important for the -DSK_RELEASE/-DSK_DEBUG to match on the libskia.a, otherwise 54# things like SKDEBUGCODE are sometimes compiled in and sometimes not, which can cause headaches 55# like sizeof() mismatching between .cpp files and .h files. 56EXTRA_CFLAGS="\"-DSK_RELEASE\"" 57if [[ $@ == *test* ]]; then 58 echo "Building a Testing/Profiling build" 59 RELEASE_CONF="-O2 --profiling -DPATHKIT_TESTING -DSK_RELEASE" 60elif [[ $@ == *debug* ]]; then 61 echo "Building a Debug build" 62 EXTRA_CFLAGS="\"-DSK_DEBUG\"" 63 RELEASE_CONF="-O0 --js-opts 0 -sSAFE_HEAP=1 -sASSERTIONS=1 -g3 -DPATHKIT_TESTING -DSK_DEBUG" 64fi 65 66WASM_CONF="-sWASM=1" 67if [[ $@ == *asm.js* ]]; then 68 echo "Building with asm.js instead of WASM" 69 WASM_CONF="-sWASM=0 -sALLOW_MEMORY_GROWTH=1" 70fi 71 72OUTPUT="-o $BUILD_DIR/pathkit.js" 73 74source $EMSDK/emsdk_env.sh 75EMCXX=`which em++` 76 77# Turn off exiting while we check for ninja (which may not be on PATH) 78set +e 79NINJA=`which ninja` 80if [[ -z $NINJA ]]; then 81 git clone "https://chromium.googlesource.com/chromium/tools/depot_tools.git" --depth 1 $BUILD_DIR/depot_tools 82 NINJA=$BUILD_DIR/depot_tools/ninja 83fi 84# Re-enable error checking 85set -e 86 87echo "Compiling bitcode" 88 89./bin/fetch-gn 90./bin/gn gen ${BUILD_DIR} \ 91 --args="skia_emsdk_dir=\"${EMSDK}\" \ 92 extra_cflags=[ 93 \"-sMAIN_MODULE=1\", 94 ${EXTRA_CFLAGS} 95 ] \ 96 is_debug=false \ 97 is_official_build=true \ 98 is_component_build=false \ 99 werror=true \ 100 target_cpu=\"wasm\" " 101 102${NINJA} -C ${BUILD_DIR} libpathkit.a 103 104echo "Generating WASM" 105 106${EMCXX} $RELEASE_CONF -std=c++17 \ 107-I. \ 108--bind \ 109--no-entry \ 110--pre-js $BASE_DIR/helper.js \ 111--pre-js $BASE_DIR/chaining.js \ 112-fno-rtti -fno-exceptions -DEMSCRIPTEN_HAS_UNBOUND_TYPE_NAMES=0 \ 113$WASM_CONF \ 114-sERROR_ON_UNDEFINED_SYMBOLS=1 \ 115-sEXPORT_NAME="PathKitInit" \ 116-sMODULARIZE=1 \ 117-sNO_EXIT_RUNTIME=1 \ 118-sNO_FILESYSTEM=1 \ 119-sDYNAMIC_EXECUTION=0 \ 120-sINITIAL_MEMORY=32MB \ 121-sALLOW_MEMORY_GROWTH=1 \ 122-sSTRICT=1 \ 123$OUTPUT \ 124$BASE_DIR/pathkit_wasm_bindings.cpp \ 125${BUILD_DIR}/libpathkit.a 126 127 128