Initial Commit

.gitignore

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+libs
+build
+tests/**/out.stl

.vscode/settings.json

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+{
+    "deno.enable": true,
+    "deno.lint": true,
+    "deno.unstable": true
+}

Dockerfile

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+FROM emscripten/emsdk as boost
+COPY boost . 
+RUN ./bootstrap.sh
+RUN ./b2 toolset=emscripten cxxflags="-std=c++11 -stdlib=libc++" linkflags="-stdlib=libc++" cxxflags=-DPTHREADS cxxflags=-DBOOST_THREAD_POSIX cxxflags=-pthread cxxflags=-DTHREAD release --disable-icu --with-regex --with-filesystem --with-system --with-thread --with-program_options install link=static runtime-link=static --prefix=/emsdk/upstream/emscripten/cache/sysroot
+
+
+FROM emscripten/emsdk as zlib
+COPY zlib . 
+RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as libzip
+COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY libzip . 
+RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as glib
+COPY glib .
+RUN apt-get update \
+  && apt-get install -qqy \
+    build-essential \
+    prelink \
+    autoconf \
+    libtool \
+    texinfo \
+    pkgconf \
+    # needed for Meson
+    ninja-build \
+    python3-pip \
+  && pip3 install meson
+ARG MESON_PATCH=https://github.com/kleisauke/wasm-vips/raw/master/build/patches/meson-emscripten.patch
+RUN cd $(dirname `python3 -c "import mesonbuild as _; print(_.__path__[0])"`) \
+  && curl -Ls $MESON_PATCH | patch -p1
+RUN chmod +x build.sh; ./build.sh
+
+
+FROM emscripten/emsdk as freetype
+COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY freetype . 
+RUN emcmake cmake -B ../build . -DFT_REQUIRE_ZLIB=TRUE -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as libxml2
+COPY libxml2 . 
+RUN emcmake cmake -B ../build . -DLIBXML2_WITH_PYTHON=OFF -DLIBXML2_WITH_LZMA=OFF -DLIBXML2_WITH_ZLIB=OFF -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as fontconfig
+RUN apt-get update && apt-get install pkg-config gperf automake libtool gettext autopoint -y
+COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=freetype /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=libxml2 /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY fontconfig . 
+RUN FREETYPE_CFLAGS="-I/emsdk/upstream/emscripten/cache/sysroot/include/freetype2" FREETYPE_LIBS="-lfreetype -lz" emconfigure ./autogen.sh CFLAGS="-s USE_PTHREADS=1" --host none --disable-docs --disable-shared --enable-static --sysconfdir=/ --localstatedir=/ --with-default-fonts=/fonts --enable-libxml2 --prefix=/emsdk/upstream/emscripten/cache/sysroot
+RUN echo "all install:" > test/Makefile.in
+RUN emmake make
+RUN emmake make install || true
+
+
+FROM emscripten/emsdk as harfbuzz
+COPY --from=freetype /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY harfbuzz . 
+RUN emcmake cmake -E env CXXFLAGS="-s USE_PTHREADS=1" cmake -B ../build . -DCMAKE_BUILD_TYPE=Release -DHB_HAVE_FREETYPE=ON
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as eigen
+COPY eigen . 
+RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as cgal
+COPY cgal . 
+RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
+RUN cd ../build && make && make install
+
+
+FROM emscripten/emsdk as gmp
+COPY gmp-6.1.2 . 
+RUN emconfigure ./configure --disable-assembly --host none --enable-cxx --prefix=/emsdk/upstream/emscripten/cache/sysroot
+RUN make && make install
+
+
+FROM emscripten/emsdk as mpfr
+COPY --from=gmp /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY mpfr-4.1.0 . 
+RUN emconfigure ./configure CFLAGS="-s USE_PTHREADS=1" --host none --with-gmp=/emsdk/upstream/emscripten/cache/sysroot --prefix=/emsdk/upstream/emscripten/cache/sysroot
+RUN make && make install
+
+
+FROM emscripten/emsdk as openscad
+RUN apt-get update && apt-get install pkg-config flex bison -y
+# Dependencies
+COPY --from=boost /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=gmp /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=mpfr /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=cgal /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=eigen /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=harfbuzz /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=fontconfig /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=glib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+COPY --from=libzip /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
+# End Dependencies
+
+COPY openscad . 
+RUN export PKG_CONFIG_PATH="/emsdk/upstream/emscripten/cache/sysroot/lib/pkgconfig"
+RUN emcmake cmake -B ../build . -DNULLGL=ON \
+    -DCMAKE_BUILD_TYPE=Release \
+    -DHARFBUZZ_INCLUDE_DIRS=/emsdk/upstream/emscripten/cache/sysroot/include/harfbuzz \
+    -DFONTCONFIG_INCLUDE_DIR=/emsdk/upstream/emscripten/cache/sysroot/include/fontconfig \
+    -DFONTCONFIG_LIBRARIES=libfontconfig.a
+
+# Hack to fix build includes
+RUN sed -e "s|-isystem /emsdk/upstream/emscripten/cache/sysroot/include||g" -i ../build/CMakeFiles/OpenSCAD.dir/includes_C.rsp
+RUN sed -e "s|-isystem /emsdk/upstream/emscripten/cache/sysroot/include||g" -i ../build/CMakeFiles/OpenSCAD.dir/includes_CXX.rsp
+RUN sed -e "s|-lfontconfig|/emsdk/upstream/emscripten/cache/sysroot/lib/libglib-2.0.a /emsdk/upstream/emscripten/cache/sysroot/lib/libzip.a /emsdk/upstream/emscripten/cache/sysroot/lib/libz.a /emsdk/upstream/emscripten/cache/sysroot/lib/libfontconfig.a|g" -i ../build/CMakeFiles/OpenSCAD.dir/linklibs.rsp
+
+# Add emscripten flags here
+RUN sed -e "s|em++|em++ -s USE_PTHREADS=1 -s NO_DISABLE_EXCEPTION_CATCHING -s FORCE_FILESYSTEM=1 -s ALLOW_MEMORY_GROWTH=1 -s EXTRA_EXPORTED_RUNTIME_METHODS=['FS'] -s EXPORTED_RUNTIME_METHODS=callMain -s EXPORT_ES6=1 -s ENVIRONMENT=web,worker -s MODULARIZE=1 -s EXPORT_NAME=OpenSCAD -s EXIT_RUNTIME=1|g" -i ../build/CMakeFiles/OpenSCAD.dir/link.txt
+
+RUN cd ../build && make -j12

Makefile

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+all: build/openscad.js
+
+clean:
+	rm -rf libs
+	rm -rf build
+
+test:
+	cd tests; deno test --allow-read --allow-write
+
+.PHONY: example
+example:
+	cd example; deno run --allow-net --allow-read server.ts
+
+build/openscad.js: build
+	docker run --name tmpcpy openscad-wasm
+	docker cp tmpcpy:/build/openscad.js build
+	docker cp tmpcpy:/build/openscad.worker.js build
+	docker cp tmpcpy:/build/openscad.wasm build
+	docker rm tmpcpy
+
+build: libs
+	docker build libs -f Dockerfile --target openscad -t openscad-wasm
+	mkdir build
+
+libs: libs/cgal \
+	libs/eigen \
+	libs/fontconfig \
+	libs/freetype \
+	libs/glib \
+	libs/harfbuzz \
+	libs/lib3mf \
+	libs/libexpat \
+	libs/liblzma \
+	libs/libzip \
+	libs/openscad \
+	libs/boost \
+	libs/gmp-6.1.2 \
+	libs/mpfr-4.1.0 \
+	libs/zlib \
+	libs/libxml2
+
+SINGLE_BRANCH=--branch master --single-branch
+SHALLOW=--depth 1 ${SINGLE_BRANCH}
+
+libs/cgal:
+	git clone https://github.com/CGAL/cgal.git ${SHALLOW} $@
+
+libs/eigen:
+	git clone https://github.com/PX4/eigen.git ${SHALLOW} $@
+
+libs/fontconfig:
+	git clone https://gitlab.freedesktop.org/fontconfig/fontconfig.git ${SHALLOW} $@
+
+libs/freetype:
+	git clone https://gitlab.freedesktop.org/freetype/freetype.git ${SHALLOW} $@
+
+libs/glib:
+	git clone https://gist.github.com/acfa1c09522705efa5eb0541d2d00887.git ${SHALLOW} $@
+	git -C $@ apply ../../patches/glib.patch 
+
+libs/harfbuzz:
+	git clone https://github.com/harfbuzz/harfbuzz.git ${SHALLOW} $@
+
+libs/lib3mf:
+	git clone https://github.com/3MFConsortium/lib3mf.git ${SHALLOW} $@
+
+libs/libexpat:
+	git clone  https://github.com/libexpat/libexpat ${SHALLOW} $@
+
+libs/liblzma:
+	git clone https://github.com/kobolabs/liblzma.git ${SHALLOW} $@
+
+libs/libzip:
+	git clone https://github.com/nih-at/libzip.git ${SHALLOW} $@
+
+libs/zlib:
+	git clone https://github.com/madler/zlib.git ${SHALLOW} $@
+
+libs/libxml2:
+	git clone https://gitlab.gnome.org/GNOME/libxml2.git ${SHALLOW} $@
+
+libs/openscad:
+	git clone --recurse https://github.com/openscad/openscad.git ${SINGLE_BRANCH} $@
+	git -C $@ checkout f4d57fb3b2da39953c843c0372b5a0a8730b3189
+	git -C $@ apply ../../patches/openscad-2019.patch
+
+libs/boost:
+	git clone --recurse https://github.com/boostorg/boost.git ${SHALLOW} $@
+	git -C $@/libs/filesystem apply ../../../../patches/boost-filesystem.patch
+
+libs/gmp-6.1.2:
+	wget https://gmplib.org/download/gmp/gmp-6.1.2.tar.lz
+	tar xf gmp-6.1.2.tar.lz -C libs
+	rm gmp-6.1.2.tar.lz
+
+libs/mpfr-4.1.0:
+	wget  https://www.mpfr.org/mpfr-current/mpfr-4.1.0.tar.xz
+	tar xf mpfr-4.1.0.tar.xz -C libs
+	rm mpfr-4.1.0.tar.xz

README.md

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+# OpenSCAD WASM Port
+
+A full port of OpenSCAD to WASM. 
+
+This project cross compiles all of the project dependencies and created a headless OpenSCAD WASM module.
+
+## Setup
+Make sure that you have the following installed:
+- Make
+- Docker
+- Deno
+
+To build the project:
+```
+make all
+```
+
+Or for specific steps:
+```
+# Generate the library files
+make libs 
+
+# Build the project
+make build
+```
+
+## Usage
+
+There is an example project in the example folder. Run it using:
+```
+cd example
+deno run --allow-net --allow-read server.ts
+
+# or
+
+make example
+```
+
+There are also automated tests that can be run using:
+```
+cd tests
+deno test --allow-read --allow-write
+
+# or
+
+make test
+```
+
+## Usage
+
+The project is a ES6 module. Simply import the module:
+```ts
+import OpenSCAD from "./openscad.js";
+
+// Instantiate the application
+const instance = await OpenSCAD({ noInitialRun: true });
+
+// Write a file to the filesystem
+instance.FS.writeFile("/input.scad", `cube(10);`);
+
+// Run OpenSCAD with the arguments "/input.scad -o cube.stl"
+instance.callMain(["/input.scad", "-o", "cube.stl"]);
+
+// Read the data from cube.stl
+const output = instance.FS.readFile("/cube.stl");
+```
+
+For more information on reading and writing files check out the [Emscripten File System API](https://emscripten.org/docs/api_reference/Filesystem-API.html).
+
+## Project Status
+- [x] module builds
+- [x] module runs
+- [ ] library created
+- [ ] tests exist
+
+## Future work
+- [ ] Fix NULLGL in OpenSCAD 2021
+- [ ] Merge WASM patch into Boost.Filesystem
+
+## Known Issues
+- [ ] text does not render
+    Fonts appear to be missing but FontConfig seems to be working correctly. This seems to just be a config issue at runtime.
+- [ ] CGAL error on intersection between cube and circle (might be a 2019 issue)

example/server.ts

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+import { Application } from "https://deno.land/x/oak/mod.ts";
+import logger from "https://deno.land/x/oak_logger/mod.ts";
+import { join } from "https://deno.land/std/path/mod.ts";
+
+const app = new Application();
+
+app.use(logger.logger);
+
+// Enable CORP headers for SharedArrayBuffer
+app.use(async (context, next) => {
+    context.response.headers.append("Cross-Origin-Opener-Policy", "same-origin");
+    context.response.headers.append("Cross-Origin-Embedder-Policy", "require-corp");
+    await next();
+})
+
+// Serve static files from example/www and build folders
+app.use(async (context, next) => {
+  try {
+    await context.send({ root: join(Deno.cwd(), "www") });
+  } catch {
+    try {
+      await context.send({ root: join(Deno.cwd(), "../build") });
+    } catch {
+      await next();
+    }
+  }
+});
+
+const port = 8080;
+console.log(`server listening on port ${port}...`);
+await app.listen({ port });

example/www/index.html

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+<!DOCTYPE html>
+<html>
+
+<body>
+    <script type="module">
+        import OpenScad from "./openscad.js";
+
+        function downloadFile(blob, fileName) {
+            const link = document.createElement('a');
+            link.href = URL.createObjectURL(blob);
+            link.download = fileName;
+            document.body.append(link);
+            link.click();
+            link.remove();
+        };
+
+        const instance = await OpenScad({ noInitialRun: true });
+
+        instance.FS.writeFile("/input.scad", `cube(10);`);
+        instance.callMain(["/input.scad", "-o", "cube.stl"]);
+        const output = instance.FS.readFile("/cube.stl");
+
+        downloadFile(new Blob([output], { type: "application/octet-stream" }), "cube.stl");
+    </script>
+</body>
+
+</html>