EnderTheCoder
889ce945f2
The engine now runs on a plain Web Worker (no SDL, no PROXY_TO_PTHREAD: in a pthread Emscripten proxies every filesystem syscall to the main browser thread, where synchronous XHR - and thus FS.createLazyFile - is forbidden). A page/worker pair transfers an OffscreenCanvas and forwards DOM input; assets load lazily from an embedded manifest, so entering a map fetches only that map and its tiles. Presentation: ra3.webgpu (WebGPU via Emscripten's emdawnwebgpu port, WGSL shaders, the default on wasm) and ra3.wasmgl (WebGL2, GLSL ES). The legacy SDL ra3.webgl backend is removed.
57 lines
2.3 KiB
Docker
57 lines
2.3 KiB
Docker
# syntax=docker/dockerfile:1
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# WebAssembly build environment (Emscripten), producing openra3.js/.wasm plus the
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# `index.html` page and `openra3.worker.js` bootstrap. The engine runs on a plain
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# Web Worker (WebGL2 and WebGPU backends), with lazy on-demand assets.
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#
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# The emsdk image ships CMake 3.28, whose experimental `import std` support is
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# too old for the project, so an upstream CMake is layered on top.
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FROM emscripten/emsdk:6.0.10 AS dev
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ENV DEBIAN_FRONTEND=noninteractive
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ARG APT_MIRROR=""
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RUN if [ -n "$APT_MIRROR" ]; then \
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sed -i -e "s|http://archive.ubuntu.com/ubuntu|${APT_MIRROR}|g" \
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-e "s|http://security.ubuntu.com/ubuntu|${APT_MIRROR}|g" \
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-e "s|http://ports.ubuntu.com/ubuntu-ports|${APT_MIRROR}|g" \
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/etc/apt/sources.list /etc/apt/sources.list.d/*.sources 2>/dev/null || true; \
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fi
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RUN --mount=type=cache,target=/var/lib/apt,sharing=locked \
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--mount=type=cache,target=/var/cache/apt,sharing=locked \
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for attempt in 1 2 3 4 5; do \
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apt-get -o Acquire::Retries=5 update && break; \
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echo "apt-get update failed (attempt $attempt), retrying"; \
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sleep 5; \
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done \
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&& apt-get -o Acquire::Retries=5 install -y --no-install-recommends \
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ca-certificates \
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curl \
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ninja-build \
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&& rm -rf /var/lib/apt/lists/*
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# Upstream CMake, because the emsdk image's 3.28 cannot build the project.
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ARG CMAKE_VERSION=4.2.3
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RUN mkdir -p /opt/cmake \
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&& curl -fL "https://github.com/Kitware/CMake/releases/download/v${CMAKE_VERSION}/cmake-${CMAKE_VERSION}-linux-x86_64.tar.gz" \
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| tar -xz -C /opt/cmake --strip-components=1
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ENV PATH="/opt/cmake/bin:${PATH}"
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# Pre-fetch the emdawnwebgpu port into the image. The WebGPU backend needs
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# <webgpu/webgpu_cpp.h>, and CMake's module dependency scanner does not process
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# `--use-port`, so a warm cache is required before the project is configured.
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RUN . /emsdk/emsdk_env.sh \
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&& printf '#include <webgpu/webgpu_cpp.h>\nint main(){}\n' > /tmp/wgpu_port.cpp \
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&& em++ -c /tmp/wgpu_port.cpp -o /tmp/wgpu_port.o --use-port=emdawnwebgpu \
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&& rm -f /tmp/wgpu_port.cpp /tmp/wgpu_port.o
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WORKDIR /work
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COPY . .
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RUN cmake -S . -B build/wasm -G Ninja \
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-DCMAKE_TOOLCHAIN_FILE=cmake/toolchains/emscripten-wasm.cmake \
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-DCMAKE_BUILD_TYPE=Release \
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&& cmake --build build/wasm -j
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