rusty_dds 0.1.0

Memory-safe DDS texture toolkit — container, decode, encode, GPU upload plans (Remade With Rust)
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# Proxy cook corpus (CC0)


Real PBR maps for encode speed/quality vs DirectXTex — **not** Star Citizen / Cry assets.

| Source | License | Notes |
|--------|---------|-------|
| [ambientCG](https://ambientcg.com/) | [CC0](https://creativecommons.org/publicdomain/zero/1.0/) | Materials downloaded as `1K-PNG` zips |

## Layout


```text
corpus/
  README.md
  manifest.json       # cook roles + paths (committed)
  fetch_ambientcg.py  # download + unpack
  raw/                # PNGs (gitignored; fetch locally)
```

## Fetch


```bash
python corpus/fetch_ambientcg.py
```

Requires network. Re-running skips files that already exist.

## Roles (Cry-shaped mix)


| Role | Map | Target BCn |
|------|-----|------------|
| albedo | `*Color.png` | BC1, BC7 |
| albedo_alpha | `*Color.png` (opaque→synthetic A later) | BC3, BC7 |
| normal | `*NormalGL.png` | BC5 |
| mask | `*Roughness.png` | BC4 |

## Contents (after fetch)


4 ambientCG materials × Color / NormalGL / Roughness = **12 PNGs** (~1024²):

| Asset | Category | Roles |
|-------|----------|-------|
| Bricks097 | brick | albedo, normal, mask |
| Metal063 | metal | albedo, normal, mask |
| Rock064 | rock | albedo, normal, mask |
| Wood095 | wood | albedo, normal, mask |

`raw/` is gitignored (~20MB PNGs + zips). Commit `manifest.json` + `fetch_ambientcg.py` only.

## Harvest vs DirectXTex


```bash
python corpus/fetch_ambientcg.py
cargo run --release --example harvest_corpus_vs_dxtex
```

Writes `docs/artifacts/corpus-vs-directxtex.{json,md}` (encode µs + round-trip PSNR).