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Example for a Emscripten project boilerplate
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#!/bin/bash | |
set -e | |
export OPTIMIZE="-Os" | |
export LDFLAGS="${OPTIMIZE}" | |
export CFLAGS="${OPTIMIZE}" | |
export CPPFLAGS="${OPTIMIZE}" | |
eval $@ | |
echo "=============================================" | |
echo "Compiling libvpx" | |
echo "=============================================" | |
test -n "$SKIP_LIBVPX" || ( | |
rm -rf build-vpx || true | |
mkdir build-vpx | |
cd build-vpx | |
emconfigure ../node_modules/libvpx/configure \ | |
--target=generic-gnu | |
emmake make | |
) | |
echo "=============================================" | |
echo "Compiling libvpx done" | |
echo "=============================================" | |
echo "=============================================" | |
echo "Compiling wasm bindings" | |
echo "=============================================" | |
( | |
# Compile C/C++ code | |
emcc \ | |
${OPTIMIZE} \ | |
--bind \ | |
-s STRICT=1 \ | |
-s ALLOW_MEMORY_GROWTH=1 \ | |
-s ASSERTIONS=0 \ | |
-s MALLOC=emmalloc \ | |
-s MODULARIZE=1 \ | |
-s EXPORT_ES6=1 \ | |
-o ./my-module.js \ | |
-I ./node_modules/libvpx \ | |
my-module.cpp \ | |
build-vpx/libvpx.a | |
# Create output folder | |
mkdir -p dist | |
# Move artifacts | |
mv my-module.{js,wasm} dist | |
) | |
echo "=============================================" | |
echo "Compiling wasm bindings done" | |
echo "=============================================" |
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FROM trzeci/emscripten | |
RUN apt-get update && \ | |
apt-get install -qqy doxygen |
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<!doctype html> | |
Open the console to see the output from the wasm module. | |
<script type="module"> | |
import wasmModule from "./my-module.js"; | |
const instance = wasmModule({ | |
onRuntimeInitialized() { | |
instance.sayHello(); | |
} | |
}); | |
</script> |
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#include "vpxenc.h" | |
#include <emscripten/bind.h> | |
using namespace emscripten; | |
int say_hello() { | |
printf("Hello from your wasm module with libvpx %d\n", VPX_CODEC_ABI_VERSION); | |
return 0; | |
} | |
EMSCRIPTEN_BINDINGS(my_module) { | |
function("sayHello", &say_hello); | |
} |
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{ | |
"name": "my-worldchanging-project", | |
"scripts": { | |
"install": "napa", | |
"build:dockerimage": "docker image inspect -f '.' mydockerimage || docker build -t mydockerimage .", | |
"build:emscripten": "docker run --rm -v $(pwd):/src mydockerimage ./build.sh", | |
"build:app": "cp index.html dist/index.html", | |
"build": "npm run build:dockerimage && npm run build:emscripten && npm run build:app", | |
"serve": "http-server -c0 dist" | |
}, | |
"devDependencies": { | |
"http-server": "*" | |
}, | |
"dependencies": { | |
"napa": "^3.0.0" | |
}, | |
"napa": { | |
"libvpx": "git+https://github.com/webmproject/libvpx" | |
} | |
} |
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