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feat(imaging): add pure-Rust Skia backend (#112)
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Chili Palmer
2026-08-13 07:49:37 +00:00
parent e1744f44bb
commit 8c18b2ac8c
46 changed files with 4301 additions and 148 deletions
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12
docs/imaging-meshing.md
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@@ -18,7 +18,8 @@ and [`MeshFoundry` guide](../crates/libremetaverse-rendering-mesh-foundry/README
| Managed images and TGA | enabled | n/a | none |
| JPEG 2000 | disabled | `libremetaverse-imaging/jpeg2000` | OpenJPEG 2.5.x |
| JPEG 2000 (pure Rust) | disabled | `libremetaverse-imaging/rust-j2k` | none (`j2k` 0.8.1) |
| BMP/GIF/ICO/JPEG/PNG/WBMP/WebP | disabled | `libremetaverse-imaging-skia/skia` | Skia |
| BMP/GIF/ICO/JPEG/PNG/WBMP/WebP (pure Rust) | disabled | `libremetaverse-imaging-skia/rust-skia` | none (`skia-rs-codec` 0.3.0 plus `image-webp` 0.2.4) |
| BMP/GIF/ICO/JPEG/PNG/WBMP/WebP (native) | disabled | `libremetaverse-imaging-skia/skia` | Skia |
| Prim and sculpt meshing, OBJ ingestion | enabled | n/a | none |
OpenJPEG is a non-default workspace member so release tooling can package the
@@ -26,10 +27,11 @@ adapter explicitly, and imaging reaches it only through the optional
dependency. The independent `rust-j2k` feature reaches only the audited
pure-Rust `j2k` graph; enabling both features keeps both explicit codec types
available for interoperability testing. Skia is likewise an optional,
target-specific dependency. The
consolidated required Gitea gate exercises both optional features on
`ubuntu-latest` while its minimal-feature check proves that no native codec is
needed for the owned Rust and translated compatibility tests.
target-specific dependency. The consolidated required Gitea gate exercises the
native feature, while a dedicated `ubuntu-latest` job tests `rust-skia`, audits
its normal/build graph without installing native codec tools, and compiles the
same code for WASM. Minimal-feature checks still prove no codec is needed for
the owned Rust and translated compatibility tests.
## Bounds and rendering contract

1
docs/release-candidate.md
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@@ -24,6 +24,7 @@ Optional boundaries are explicit:
| --- | --- | --- |
| `jpeg2000` | J2K/JP2 through the safe OpenJPEG adapter | OpenJPEG 2.5.4 or newer |
| `rust-j2k` | J2K/JP2 through `RustJ2kCodec` | none; exact pure-Rust `j2k` 0.8.1 |
| `rust-skia` | BMP/GIF/ICO/JPEG/PNG/WBMP/WebP through `RustSkiaTextureCodec` | none; exact pure-Rust `skia-rs-codec` 0.3.0 and `image-webp` 0.2.4 |
| `skia` | PNG/JPEG/WebP and other Skia formats | Skia 0.99 target cache or documented source tools |
| `vorbis` | PCM to Ogg Vorbis | the locked `vorbis_rs` native build stack |
| default WebRTC | native ICE/DTLS/SRTP/RTP/SCTP and Opus | system libopus 1.3 or newer |

2
docs/rust-api-guide.md
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@@ -19,7 +19,7 @@ they use those APIs directly.
| `libremetaverse-types` | UUIDs, vectors, matrices, colors, cancellation, compatibility collections, and boundary types | Pure Rust |
| `libremetaverse-structured-data` | LLSD/OSD XML, JSON, binary, and notation | Pure Rust |
| `libremetaverse-imaging` | Managed images, TGA/DDS, codec traits | Optional `jpeg2000` or pure-Rust `rust-j2k` |
| `libremetaverse-imaging-skia` | Common raster formats through Skia | Optional `skia`; native Skia build/cache |
| `libremetaverse-imaging-skia` | Common raster formats through native Skia or pure Rust | Optional `skia` native build/cache; optional `rust-skia` has no native prerequisites |
| `libremetaverse-prim-mesher` | Legacy prim and sculpt geometry | Pure Rust |
| `libremetaverse-rendering-simple` | Deterministic reference geometry | Pure Rust |
| `libremetaverse-rendering-mesh-foundry` | Prim, terrain, sculpt, and mesh-asset rendering | Pure Rust |