# W-030 Status

status: done
task: 从内存读取 `.blend`

## Evidence

- Reader: `blender-5.2.0/source/blender/web_engine/web_engine_blend_reader.cpp`
- ABI: `web_engine_open_blend(handle, data, length)` copies an `ArrayBuffer` into
  WASM memory and never receives a browser or POSIX path.
- Worker: `web/app/src/workers/web-engine.worker.ts` reports started/progress/completed
  phases and maps malformed input to `BLEND_READ_FAILED`.
- Golden: `tests/golden/W-030/manifest.json`

The reader accepts uncompressed, gzip and zstd Blender streams, validates the
little-endian Blender header, decodes the embedded DNA1 schema and returns an
empty or populated SceneIR snapshot. `empty.blend` and `basic_scene.blend` are
both exercised by the WASM smoke.

## Verification

```text
node tools/web/run-web-engine-smoke.mjs  # empty + basic + save passed
tools/web/check-dual-engine.sh           # native ABI + WASM reader passed
```

## Remaining risk

The first reader is deliberately bounded to a 1 GiB block and summary export;
evaluated mesh buffers are W-033.