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‎.gitignore

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libs
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build
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tests/**/out.stl

‎.vscode/settings.json

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

‎COPYING

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‎Dockerfile

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FROM emscripten/emsdk as boost
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COPY boost .
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RUN ./bootstrap.sh
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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
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FROM emscripten/emsdk as zlib
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COPY zlib .
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RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as libzip
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COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY libzip .
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RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as glib
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COPY glib .
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RUN apt-get update \
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&& apt-get install -qqy \
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build-essential \
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prelink \
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autoconf \
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libtool \
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texinfo \
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pkgconf \
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# needed for Meson
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ninja-build \
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python3-pip \
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&& pip3 install meson
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ARG MESON_PATCH=https://github.com/kleisauke/wasm-vips/raw/master/build/patches/meson-emscripten.patch
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RUN cd $(dirname `python3 -c "import mesonbuild as _; print(_.__path__[0])"`) \
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&& curl -Ls $MESON_PATCH | patch -p1
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RUN chmod +x build.sh; ./build.sh
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FROM emscripten/emsdk as freetype
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COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY freetype .
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RUN emcmake cmake -B ../build . -DFT_REQUIRE_ZLIB=TRUE -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as libxml2
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COPY libxml2 .
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RUN emcmake cmake -B ../build . -DLIBXML2_WITH_PYTHON=OFF -DLIBXML2_WITH_LZMA=OFF -DLIBXML2_WITH_ZLIB=OFF -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as fontconfig
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RUN apt-get update && apt-get install pkg-config gperf automake libtool gettext autopoint -y
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COPY --from=zlib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=freetype /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=libxml2 /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY fontconfig .
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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
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RUN echo "all install:" > test/Makefile.in
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RUN emmake make
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RUN emmake make install || true
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FROM emscripten/emsdk as harfbuzz
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COPY --from=freetype /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY harfbuzz .
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RUN emcmake cmake -E env CXXFLAGS="-s USE_PTHREADS=1" cmake -B ../build . -DCMAKE_BUILD_TYPE=Release -DHB_HAVE_FREETYPE=ON
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as eigen
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COPY eigen .
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RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as cgal
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COPY cgal .
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RUN emcmake cmake -B ../build . -DCMAKE_BUILD_TYPE=Release
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RUN cd ../build && make && make install
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FROM emscripten/emsdk as gmp
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COPY gmp-6.1.2 .
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RUN emconfigure ./configure --disable-assembly --host none --enable-cxx --prefix=/emsdk/upstream/emscripten/cache/sysroot
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RUN make && make install
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FROM emscripten/emsdk as mpfr
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COPY --from=gmp /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY mpfr-4.1.0 .
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RUN emconfigure ./configure CFLAGS="-s USE_PTHREADS=1" --host none --with-gmp=/emsdk/upstream/emscripten/cache/sysroot --prefix=/emsdk/upstream/emscripten/cache/sysroot
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RUN make && make install
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FROM emscripten/emsdk as openscad
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RUN apt-get update && apt-get install pkg-config flex bison -y
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# Dependencies
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COPY --from=boost /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=gmp /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=mpfr /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=cgal /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=eigen /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=harfbuzz /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=fontconfig /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=glib /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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COPY --from=libzip /emsdk/upstream/emscripten/cache/sysroot /emsdk/upstream/emscripten/cache/sysroot
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# End Dependencies
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COPY openscad .
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RUN export PKG_CONFIG_PATH="/emsdk/upstream/emscripten/cache/sysroot/lib/pkgconfig"
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RUN emcmake cmake -B ../build . -DNULLGL=ON \
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-DCMAKE_BUILD_TYPE=Release \
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-DHARFBUZZ_INCLUDE_DIRS=/emsdk/upstream/emscripten/cache/sysroot/include/harfbuzz \
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-DFONTCONFIG_INCLUDE_DIR=/emsdk/upstream/emscripten/cache/sysroot/include/fontconfig \
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-DFONTCONFIG_LIBRARIES=libfontconfig.a
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# Hack to fix build includes
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RUN sed -e "s|-isystem /emsdk/upstream/emscripten/cache/sysroot/include||g" -i ../build/CMakeFiles/OpenSCAD.dir/includes_C.rsp
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RUN sed -e "s|-isystem /emsdk/upstream/emscripten/cache/sysroot/include||g" -i ../build/CMakeFiles/OpenSCAD.dir/includes_CXX.rsp
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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
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# Add emscripten flags here
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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
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RUN cd ../build && make -j12

‎Makefile

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

‎README.md

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# OpenSCAD WASM Port
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A full port of OpenSCAD to WASM.
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This project cross compiles all of the project dependencies and created a headless OpenSCAD WASM module.
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## Setup
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Make sure that you have the following installed:
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- Make
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- Docker
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- Deno
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To build the project:
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```
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make all
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```
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Or for specific steps:
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```
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# Generate the library files
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make libs
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# Build the project
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make build
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```
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## Usage
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There is an example project in the example folder. Run it using:
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```
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cd example
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deno run --allow-net --allow-read server.ts
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# or
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make example
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```
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There are also automated tests that can be run using:
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```
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cd tests
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deno test --allow-read --allow-write
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# or
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make test
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```
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## Usage
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The project is a ES6 module. Simply import the module:
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```ts
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import OpenSCAD from "./openscad.js";
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// Instantiate the application
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const instance = await OpenSCAD({ noInitialRun: true });
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// Write a file to the filesystem
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instance.FS.writeFile("/input.scad", `cube(10);`);
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// Run OpenSCAD with the arguments "/input.scad -o cube.stl"
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instance.callMain(["/input.scad", "-o", "cube.stl"]);
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// Read the data from cube.stl
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const output = instance.FS.readFile("/cube.stl");
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```
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For more information on reading and writing files check out the [Emscripten File System API](https://emscripten.org/docs/api_reference/Filesystem-API.html).
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## Project Status
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- [x] module builds
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- [x] module runs
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- [ ] library created
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- [ ] tests exist
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## Future work
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- [ ] Fix NULLGL in OpenSCAD 2021
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- [ ] Merge WASM patch into Boost.Filesystem
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## Known Issues
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- [ ] text does not render
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Fonts appear to be missing but FontConfig seems to be working correctly. This seems to just be a config issue at runtime.
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- [ ] 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";
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import logger from "https://deno.land/x/oak_logger/mod.ts";
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import { join } from "https://deno.land/std/path/mod.ts";
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const app = new Application();
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app.use(logger.logger);
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// Enable CORP headers for SharedArrayBuffer
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app.use(async (context, next) => {
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context.response.headers.append("Cross-Origin-Opener-Policy", "same-origin");
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context.response.headers.append("Cross-Origin-Embedder-Policy", "require-corp");
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await next();
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})
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// Serve static files from example/www and build folders
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app.use(async (context, next) => {
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try {
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await context.send({ root: join(Deno.cwd(), "www") });
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} catch {
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try {
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await context.send({ root: join(Deno.cwd(), "../build") });
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} catch {
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await next();
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}
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}
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});
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const port = 8080;
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console.log(`server listening on port ${port}...`);
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await app.listen({ port });

‎example/www/index.html

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

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