mirror of
https://github.com/HeyPuter/blender-wasm.git
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velzieandClaude Opus 5.5
e73ddff770
GL backend (build-blender-gl, BLENDER_GPU=gl): wink/epoxy build scripts, cmake cache, Blender/Mesa patches, WGSL seed cache, demo wiring, and the compat/latency/GPU bench + profiling harnesses. numpy: scripts/build_numpy.sh cross-compiles numpy 2.3.4 and links its extension modules into blender.wasm as builtins (fixes glTF/FBX import, 'No module named numpy'). CPython: undo mimalloc's __wasi__ leak in timemodule.c so time.process_time() works (FBX export). Bump BLENDER_REF for the glTF/FBX add-on fixes. scripts/numpy_io_test.mjs covers numpy and glTF/FBX/OBJ/PLY/STL import/export in the browser. Co-Authored-By: Claude Opus 5.5 <[email protected]> Claude-Session: https://claude.ai/code/session_25da9696629446c4ae08c8603ff6ea2f
93 lines
4.3 KiB
Bash
93 lines
4.3 KiB
Bash
#!/usr/bin/env bash
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# CPython 3.13.13 → wasm-sysroot (static libpython, embedded into Blender).
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# Two-step emscripten cross-build per CPython's Tools/wasm/README.md:
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# 1) a native build-python of the SAME version (freezes stdlib during cross-build)
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# 2) the wasm cross-build with --enable-wasm-pthreads (matches our -pthread ABI)
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set -euo pipefail
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source "$(dirname "$0")/dep_common.sh"
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PYSRC=$(fetch_extract \
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"https://www.python.org/ftp/python/3.13.13/Python-3.13.13.tar.xz" \
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"Python-3.13.13.tar.xz" "Python-3.13.13")
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# The bundled mimalloc's internal.h does `#define __wasi__` on Emscripten, and it
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# leaks into every core module through pycore_*.h. timemodule.c then takes its
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# WASI-only (gh-115714) fallbacks, leaving time.process_time()/times() on clock(),
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# which Emscripten doesn't implement -> RuntimeError (breaks e.g. the FBX
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# exporter). Emscripten's CPU-time clocks work, so undo the leak in that file.
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if ! grep -q "blender-wasm: mimalloc __wasi__ leak" "$PYSRC/Modules/timemodule.c"; then
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python3 - "$PYSRC/Modules/timemodule.c" <<'PYEOF'
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import sys
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p = sys.argv[1]; s = open(p).read()
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anchor = '#include <time.h> // clock()\n'
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assert anchor in s
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s = s.replace(anchor, anchor + (
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'/* blender-wasm: mimalloc __wasi__ leak (see scripts/build_python.sh). */\n'
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'#if defined(__EMSCRIPTEN__) && defined(__wasi__)\n'
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'# undef __wasi__\n'
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'#endif\n'), 1)
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open(p, 'w').write(s)
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PYEOF
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log "patched timemodule.c (emscripten CPU-time clocks)"
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fi
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# 1) Native build-python (host interpreter used by the cross-build).
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NATIVE="$BLD/python-native"
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# Must be a COMPLETE build (incl. extension modules like binascii) — the wasm
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# cross-build runs this interpreter for its freeze/codegen steps.
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if [ ! -x "$NATIVE/python" ] || ! "$NATIVE/python" -c "import binascii, zlib" 2>/dev/null; then
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log "building native build-python 3.13.13 (full)"
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rm -rf "$NATIVE"; mkdir -p "$NATIVE"; ( cd "$NATIVE"
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"$PYSRC/configure" -C >/dev/null
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make -j"$NPROC" >/dev/null 2>&1 )
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fi
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BUILD_PY="$NATIVE/python"
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"$BUILD_PY" --version
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# 2) WASM cross-build → $SYSROOT.
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WB="$BLD/python-wasm"; rm -rf "$WB"; mkdir -p "$WB"
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( cd "$WB"
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# -DPY_CALL_TRAMPOLINE: enable CPython's Emscripten C-function call trampoline.
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# WASM call_indirect enforces exact signature match; CPython calls METH_NOARGS/
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# METH_O C functions through a generic PyCFunctionWithKeywords pointer, which is
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# a bad fpcast that traps ("null function or function signature mismatch") on
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# wasm. The trampoline routes those calls through JS (wasmTable.get + arity
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# reflection) so the real arity is honored. Not auto-defined by 3.13 configure.
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CONFIG_SITE="$PYSRC/Tools/wasm/config.site-wasm32-emscripten" \
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CFLAGS="-fexceptions -DPY_CALL_TRAMPOLINE" \
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emconfigure "$PYSRC/configure" -C \
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--host=wasm32-unknown-emscripten \
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--build=x86_64-pc-linux-gnu \
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--enable-wasm-pthreads \
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--with-build-python="$BUILD_PY" \
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--prefix="$SYSROOT" \
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--disable-shared \
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--disable-test-modules \
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--with-ensurepip=no
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emmake make -j"$NPROC"
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emmake make install )
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# The _decimal module's bundled libmpdec objects compile but are NOT archived
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# into libpython3.13.a by CPython's static-wasm build, so _decimal.o is left with
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# undefined mpd_* symbols at the final Blender link. Fold them into the archive.
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# Several bundled modules compile their support sources but CPython's static-wasm
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# build does NOT archive them into libpython3.13.a, leaving undefined symbols at
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# the final Blender link: _decimal's libmpdec (mpd_*), pyexpat/_elementtree's
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# vendored expat (PyExpat_XML_*), and hashlib's HACL SHA2 (python_hashlib_*).
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# Fold them in. Prefix member names: libmpdec has context.o/io.o whose BASENAMES
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# collide with core CPython objects in the flat-namespaced archive (`ar r` keys
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# by basename and would silently overwrite Python's own context.o).
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_mz=$(mktemp -d)
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for _o in "$WB"/Modules/_decimal/libmpdec/*.o \
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"$WB"/Modules/expat/xmlparse.o "$WB"/Modules/expat/xmltok.o "$WB"/Modules/expat/xmlrole.o \
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"$WB"/Modules/_hacl/Hacl_Hash_SHA2.o; do
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[ -f "$_o" ] && cp "$_o" "$_mz/pymod_$(basename "$_o")"
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done
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if ls "$_mz"/*.o >/dev/null 2>&1; then
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emar r "$SYSROOT/lib/libpython3.13.a" "$_mz"/*.o
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log "archived bundled libmpdec/expat/hacl objects into libpython3.13.a"
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fi
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rm -rf "$_mz"
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log "installed python into $SYSROOT"
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ls -la "$SYSROOT"/lib/libpython3.13*.a 2>&1
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