feat(imaging): add pure-Rust Skia backend (#112)

2026-08-13 07:49:37 +00:00
parent e1744f44bb
commit 8c18b2ac8c
46 changed files with 4301 additions and 148 deletions
--- a/.gitea/workflows/ci.yml
+++ b/.gitea/workflows/ci.yml
@@ -16,6 +16,35 @@ concurrency:
  cancel-in-progress: true
 jobs:
  rust-skia:
    name: rust-skia (Rust only)
    runs-on: ubuntu-latest
    timeout-minutes: 15
    env:
      CARGO_BUILD_JOBS: "1"
      CARGO_INCREMENTAL: "0"
      CARGO_PROFILE_DEV_DEBUG: "0"
      CARGO_PROFILE_TEST_DEBUG: "0"
    steps:
      - uses: actions/checkout@v4
      # Deliberately do not install CMake, Clang, pkg-config, Skia, WebP, or
      # any other native codec prerequisite in this job.
      - name: Install pinned Rust
        uses: dtolnay/rust-toolchain@master
        with:
          toolchain: 1.97.1
          targets: wasm32-unknown-unknown
      - name: Test the pure-Rust Skia-compatible extension
        run: cargo test --locked -j 1 -p libremetaverse-imaging-skia --no-default-features --features rust-skia
      - name: Audit the normal and build dependency graph
        run: cargo tree --locked -p libremetaverse-imaging-skia --no-default-features --features rust-skia -e normal,build
      - name: Compile the same Rust codec for WASM
        run: cargo check --locked -j 1 -p libremetaverse-imaging-skia --no-default-features --features rust-skia --target wasm32-unknown-unknown
  required:
    name: required
    runs-on: ubuntu-latest
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -52,6 +52,12 @@ dependencies = [
 "memchr",
 ]
 [[package]]
 name = "allocator-api2"
 version = "0.2.21"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "683d7910e743518b0e34f1186f92494becacb047c7b6bf616c96772180fef923"
 [[package]]
 name = "alsa"
 version = "0.11.0"
@@ -59,7 +65,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "812947049edcd670a82cd5c73c3661d2e58468577ba8489de58e1a73c04cbd5d"
 dependencies = [
 "alsa-sys",
- "bitflags",
+ "bitflags 2.13.1",
 "cfg-if",
 "libc",
 ]
@@ -143,6 +149,15 @@ dependencies = [
 "ogg_next_sys",
 ]
 [[package]]
 name = "approx"
 version = "0.5.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cab112f0a86d568ea0e627cc1d6be74a1e9cd55214684db5561995f6dad897c6"
 dependencies = [
 "num-traits",
 ]
 [[package]]
 name = "arrayvec"
 version = "0.7.8"
@@ -254,7 +269,7 @@ version = "0.72.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "993776b509cfb49c750f11b8f07a46fa23e0a1386ffc01fb1e7d343efc387895"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "cexpr",
 "clang-sys",
 "itertools",
@@ -263,11 +278,26 @@ dependencies = [
 "proc-macro2",
 "quote",
 "regex",
- "rustc-hash",
+ "rustc-hash 2.1.3",
 "shlex 1.3.0",
 "syn 2.0.119",
 ]
 [[package]]
 name = "bit-set"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08807e080ed7f9d5433fa9b275196cfc35414f66a0c79d864dc51a0d825231a3"
 dependencies = [
 "bit-vec 0.8.0",
 ]
 [[package]]
 name = "bit-vec"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5e764a1d40d510daf35e07be9eb06e75770908c27d411ee6c92109c9840eaaf7"
 [[package]]
 name = "bit-vec"
 version = "0.9.1"
@@ -277,6 +307,12 @@ dependencies = [
 "serde",
 ]
 [[package]]
 name = "bitflags"
 version = "1.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bef38d45163c2f1dde094a7dfd33ccf595c92905c8f8f4fdc18d06fb1037718a"
 [[package]]
 name = "bitflags"
 version = "2.13.1"
@@ -316,6 +352,38 @@ version = "3.20.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "72f5acc6cb2ba439de613abc23857ec3d78374d8ed5ac84e9d11336e87da8649"
 [[package]]
 name = "bytemuck"
 version = "1.25.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "95832e849adfb21180ccb6826a99da14e5d266ae5c2e668e1602cf234f153797"
 dependencies = [
 "bytemuck_derive",
 ]
 [[package]]
 name = "bytemuck_derive"
 version = "1.12.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "fc0e56a716f1e132ff6bf4bdac1c944a3fcdc1cae65f70a4a2a1ac3b401d2d1f"
 dependencies = [
 "proc-macro2",
 "quote",
 "syn 3.0.3",
 ]
 [[package]]
 name = "byteorder"
 version = "1.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1fd0f2584146f6f2ef48085050886acf353beff7305ebd1ae69500e27c67f64b"
 [[package]]
 name = "byteorder-lite"
 version = "0.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8f1fe948ff07f4bd06c30984e69f5b4899c516a3ef74f34df92a2df2ab535495"
 [[package]]
 name = "bytes"
 version = "1.12.1"
@@ -479,6 +547,22 @@ dependencies = [
 "cc",
 ]
 [[package]]
 name = "codespan-reporting"
 version = "0.11.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3538270d33cc669650c4b093848450d380def10c331d38c768e34cac80576e6e"
 dependencies = [
 "termcolor",
 "unicode-width",
 ]
 [[package]]
 name = "color_quant"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "3d7b894f5411737b7867f4827955924d7c254fc9f4d91a6aad6b097804b1018b"
 [[package]]
 name = "colorchoice"
 version = "1.0.5"
@@ -529,7 +613,7 @@ version = "0.14.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7d5d7dca3ebcf65a035582c9ad4385371a9d9ee6537474d2a278f4e1e475bb58"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "libc",
 "objc2-audio-toolbox",
 "objc2-core-audio",
@@ -823,7 +907,7 @@ version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e0e367e4e7da84520dedcac1901e4da967309406d1e51017ae1abfb97adbd38"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 ]
@@ -844,6 +928,15 @@ version = "1.0.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92773504d58c093f6de2459af4af33faa518c13451eb8f2b5698ed3d36e7c813"
 [[package]]
 name = "earcut"
 version = "0.4.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88459a2a8e3a514b6e6de38cf3aaa9250a894cb098f74a932db77fcc8341b6d0"
 dependencies = [
 "num-traits",
 ]
 [[package]]
 name = "ecdsa"
 version = "0.16.9"
@@ -907,6 +1000,15 @@ version = "2.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "da7c62ceae207dd37ea5b845da6a0696c799f85e97da1ab5b7910be3c1c80223"
 [[package]]
 name = "fdeflate"
 version = "0.3.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1e6853b52649d4ac5c0bd02320cddc5ba956bdb407c4b75a2c6b75bf51500f8c"
 dependencies = [
 "simd-adler32",
 ]
 [[package]]
 name = "fearless_simd"
 version = "0.4.1"
@@ -961,6 +1063,18 @@ dependencies = [
 "miniz_oxide",
 ]
 [[package]]
 name = "float_next_after"
 version = "2.0.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "37007738a80ea34f969af54a3390dd72cacdef654974cfd449c9f6f72dbaac10"
 [[package]]
 name = "foldhash"
 version = "0.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "77ce24cb58228fbb8aa041425bb1050850ac19177686ea6e0f41a70416f56fdb"
 [[package]]
 name = "form_urlencoded"
 version = "1.2.2"
@@ -1047,6 +1161,51 @@ dependencies = [
 "zeroize",
 ]
 [[package]]
 name = "geo"
 version = "0.33.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "30eb1fdc57c1e5cfd11826fe0caec4b9dc7901f3758263bb506228d88c8d9e9a"
 dependencies = [
 "earcut",
 "float_next_after",
 "geo-types",
 "geographiclib-rs",
 "i_overlay",
 "log",
 "num-traits",
 "rand 0.10.2",
 "rand_pcg",
 "robust",
 "rstar",
 "sif-itree",
 "spade",
 ]
 [[package]]
 name = "geo-types"
 version = "0.7.20"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "777d18aa0f12f8b285331cd867133ee14422b3f023f6d388034c47d43e28786a"
 dependencies = [
 "approx",
 "num-traits",
 "rayon",
 "rstar",
 "serde",
 "spade",
 "thiserror 2.0.20",
 ]
 [[package]]
 name = "geographiclib-rs"
 version = "0.2.7"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c5a7f08910fd98737a6eda7568e7c5e645093e073328eeef49758cfe8b0489c7"
 dependencies = [
 "libm",
 ]
 [[package]]
 name = "getrandom"
 version = "0.2.17"
@@ -1096,6 +1255,22 @@ dependencies = [
 "polyval",
 ]
 [[package]]
 name = "gif"
 version = "0.13.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4ae047235e33e2829703574b54fdec96bfbad892062d97fed2f76022287de61b"
 dependencies = [
 "color_quant",
 "weezl",
 ]
 [[package]]
 name = "glam"
 version = "0.29.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8babf46d4c1c9d92deac9f7be466f76dfc4482b6452fc5024b5e8daf6ffeb3ee"
 [[package]]
 name = "glob"
 version = "0.3.4"
@@ -1124,18 +1299,54 @@ dependencies = [
 "subtle",
 ]
 [[package]]
 name = "hash32"
 version = "0.3.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "47d60b12902ba28e2730cd37e95b8c9223af2808df9e902d4df49588d1470606"
 dependencies = [
 "byteorder",
 ]
 [[package]]
 name = "hashbrown"
 version = "0.16.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "841d1cc9bed7f9236f321df977030373f4a4163ae1a7dbfe1a51a2c1a51d9100"
 dependencies = [
 "allocator-api2",
 "equivalent",
 "foldhash",
 ]
 [[package]]
 name = "hashbrown"
 version = "0.17.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed5909b6e89a2db4456e54cd5f673791d7eca6732202bbf2a9cc504fe2f9b84a"
 [[package]]
 name = "heapless"
 version = "0.8.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0bfb9eb618601c89945a70e254898da93b13be0388091d42117462b265bb3fad"
 dependencies = [
 "hash32",
 "stable_deref_trait",
 ]
 [[package]]
 name = "heck"
 version = "0.5.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2304e00983f87ffb38b55b444b5e3b60a884b5d30c0fca7d82fe33449bbe55ea"
 [[package]]
 name = "hexf-parse"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "dfa686283ad6dd069f105e5ab091b04c62850d3e4cf5d67debad1933f55023df"
 [[package]]
 name = "hkdf"
 version = "0.12.4"
@@ -1266,6 +1477,52 @@ dependencies = [
 "tracing",
 ]
 [[package]]
 name = "i_float"
 version = "1.16.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "813145bb0ad5b60f55cbbf3c74cdceda1c0a9d253b35c4cc36ae0df7887cb78f"
 dependencies = [
 "libm",
 ]
 [[package]]
 name = "i_key_sort"
 version = "0.10.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d73d122b937fca067feb0ad74f62388920272b27c356d4df2d0cfdd59e044cf0"
 dependencies = [
 "rayon",
 ]
 [[package]]
 name = "i_overlay"
 version = "4.5.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "8dd314b4668e2b3a12508f2e125558c82a6c0a8636fa5107a900f79ce414e450"
 dependencies = [
 "i_float",
 "i_key_sort",
 "i_shape",
 "i_tree",
 "rayon",
 ]
 [[package]]
 name = "i_shape"
 version = "1.18.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "bfa9eac533d7509a8ab87672b60ac610c17240f9ea4851d26227689fdfe349c8"
 dependencies = [
 "i_float",
 ]
 [[package]]
 name = "i_tree"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4804bdc1dc124eb7e1aa9e144ecc04096bcf787a10a15fa44af682b51f0f6cce"
 [[package]]
 name = "icu_collections"
 version = "2.2.0"
@@ -1369,6 +1626,16 @@ dependencies = [
 "icu_properties",
 ]
 [[package]]
 name = "image-webp"
 version = "0.2.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "525e9ff3e1a4be2fbea1fdf0e98686a6d98b4d8f937e1bf7402245af1909e8c3"
 dependencies = [
 "byteorder-lite",
 "quick-error",
 ]
 [[package]]
 name = "indexmap"
 version = "2.14.0"
@@ -1376,7 +1643,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d466e9454f08e4a911e14806c24e16fba1b4c121d1ea474396f396069cf949d9"
 dependencies = [
 "equivalent",
- "hashbrown",
+ "hashbrown 0.17.1",
 ]
 [[package]]
@@ -1551,6 +1818,21 @@ dependencies = [
 "libc",
 ]
 [[package]]
 name = "jpeg-decoder"
 version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "00810f1d8b74be64b13dbf3db89ac67740615d6c891f0e7b6179326533011a07"
 dependencies = [
 "rayon",
 ]
 [[package]]
 name = "jpeg-encoder"
 version = "0.6.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b454d911ac55068f53495488d8ccd0646eaa540c033a28ee15b07838afafb01f"
 [[package]]
 name = "js-sys"
 version = "0.3.104"
@@ -1660,8 +1942,10 @@ dependencies = [
 name = "libremetaverse-imaging-skia"
 version = "0.0.1"
 dependencies = [
 "image-webp",
 "libremetaverse-imaging",
 "libremetaverse-types",
 "skia-rs-codec",
 "skia-safe",
 ]
@@ -1821,6 +2105,15 @@ version = "0.8.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "92daf443525c4cce67b150400bc2316076100ce0b3686209eb8cf3c31612e6f0"
 [[package]]
 name = "lock_api"
 version = "0.4.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "224399e74b87b5f3557511d98dff8b14089b3dadafcab6bb93eab67d3aace965"
 dependencies = [
 "scopeguard",
 ]
 [[package]]
 name = "log"
 version = "0.4.33"
@@ -1954,13 +2247,34 @@ dependencies = [
 "pxfm",
 ]
 [[package]]
 name = "naga"
 version = "23.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "364f94bc34f61332abebe8cad6f6cd82a5b65cff22c828d05d0968911462ca4f"
 dependencies = [
 "arrayvec",
 "bit-set",
 "bitflags 2.13.1",
 "cfg_aliases 0.1.1",
 "codespan-reporting",
 "hexf-parse",
 "indexmap",
 "log",
 "rustc-hash 1.1.0",
 "spirv",
 "termcolor",
 "thiserror 1.0.69",
 "unicode-xid",
 ]
 [[package]]
 name = "ndk"
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 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "c3f42e7bbe13d351b6bead8286a43aac9534b82bd3cc43e47037f012ebfd62d4"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "jni-sys 0.3.1",
 "log",
 "ndk-sys",
@@ -1989,7 +2303,7 @@ version = "0.28.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ab2156c4fce2f8df6c499cc1c763e4394b7482525bf2a9701c9d79d215f519e4"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "cfg-if",
 "cfg_aliases 0.1.1",
 "libc",
@@ -2002,7 +2316,7 @@ version = "0.31.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "cf20d2fde8ff38632c426f1165ed7436270b44f199fc55284c38276f9db47c3d"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "cfg-if",
 "cfg_aliases 0.2.2",
 "libc",
@@ -2070,6 +2384,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "071dfc062690e90b734c0b2273ce72ad0ffa95f0c74596bc250dcfd960262841"
 dependencies = [
 "autocfg",
 "libm",
 ]
 [[package]]
@@ -2109,7 +2424,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "6948501a91121d6399b79abaa33a8aa4ea7857fe019f341b8c23ad6e81b79b08"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "libc",
 "objc2",
 "objc2-core-audio",
@@ -2124,7 +2439,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "13a380031deed8e99db00065c45937da434ca987c034e13b87e4441f9e4090be"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 "objc2-foundation",
 ]
@@ -2135,7 +2450,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "73ad74d880bb43877038da939b7427bba67e9dd42004a18b809ba7d87cee241c"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 "objc2-foundation",
 ]
@@ -2159,7 +2474,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "5a89f2ec274a0cf4a32642b2991e8b351a404d290da87bb6a9a9d8632490bd1c"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 ]
@@ -2179,7 +2494,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2a180dd8642fa45cdb7dd721cd4c11b1cadd4929ce112ebd8b9f5803cc79d536"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "block2",
 "dispatch2",
 "libc",
@@ -2192,7 +2507,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e022c9d066895efa1345f8e33e584b9f958da2fd4cd116792e15e07e4720a807"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "dispatch2",
 "objc2",
 "objc2-core-foundation",
@@ -2225,7 +2540,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "0cde0dfb48d25d2b4862161a4d5fcc0e3c24367869ad306b0c9ec0073bfed92d"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 "objc2-core-foundation",
 "objc2-core-graphics",
@@ -2243,7 +2558,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e3e0adef53c21f888deb4fa59fc59f7eb17404926ee8a6f59f5df0fd7f9f3272"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "block2",
 "libc",
 "objc2",
@@ -2256,7 +2571,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "180788110936d59bab6bd83b6060ffdfffb3b922ba1396b312ae795e1de9d81d"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 "objc2-core-foundation",
 ]
@@ -2267,7 +2582,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "96c1358452b371bf9f104e21ec536d37a650eb10f7ee379fff67d2e08d537f1f"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "objc2",
 "objc2-core-foundation",
 "objc2-foundation",
@@ -2279,7 +2594,7 @@ version = "0.3.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d87d638e33c06f577498cbcc50491496a3ed4246998a7fbba7ccb98b1e7eab22"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "block2",
 "objc2",
 "objc2-cloud-kit",
@@ -2385,6 +2700,29 @@ dependencies = [
 "sha2 0.10.9",
 ]
 [[package]]
 name = "parking_lot"
 version = "0.12.5"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "93857453250e3077bd71ff98b6a65ea6621a19bb0f559a85248955ac12c45a1a"
 dependencies = [
 "lock_api",
 "parking_lot_core",
 ]
 [[package]]
 name = "parking_lot_core"
 version = "0.9.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "2621685985a2ebf1c516881c026032ac7deafcda1a2c9b7850dc81e3dfcb64c1"
 dependencies = [
 "cfg-if",
 "libc",
 "redox_syscall",
 "smallvec",
 "windows-link",
 ]
 [[package]]
 name = "pem-rfc7468"
 version = "0.7.0"
@@ -2428,6 +2766,19 @@ version = "0.2.3"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b4596b6d070b27117e987119b4dac604f3c58cfb0b191112e24771b2faeac1a6"
 [[package]]
 name = "png"
 version = "0.17.16"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "82151a2fc869e011c153adc57cf2789ccb8d9906ce52c0b39a6b5697749d7526"
 dependencies = [
 "bitflags 1.3.2",
 "crc32fast",
 "fdeflate",
 "flate2",
 "miniz_oxide",
 ]
 [[package]]
 name = "poly1305"
 version = "0.8.0"
@@ -2518,6 +2869,12 @@ version = "0.1.30"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d55d956fa96f5ec02be2e13af0e20391a5aa83d6a074e3ad368959d0fab299ea"
 [[package]]
 name = "quick-error"
 version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a993555f31e5a609f617c12db6250dedcac1b0a85076912c436e6fc9b2c8e6a3"
 [[package]]
 name = "quinn"
 version = "0.11.11"
@@ -2529,7 +2886,7 @@ dependencies = [
 "pin-project-lite",
 "quinn-proto",
 "quinn-udp",
- "rustc-hash",
+ "rustc-hash 2.1.3",
 "rustls",
 "socket2",
 "thiserror 2.0.20",
@@ -2551,7 +2908,7 @@ dependencies = [
 "rand 0.10.2",
 "rand_pcg",
 "ring",
- "rustc-hash",
+ "rustc-hash 2.1.3",
 "rustls",
 "rustls-pki-types",
 "slab",
@@ -2693,6 +3050,15 @@ dependencies = [
 "yasna",
 ]
 [[package]]
 name = "redox_syscall"
 version = "0.5.18"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ed2bf2547551a7053d6fdfafda3f938979645c44812fbfcda098faae3f1a362d"
 dependencies = [
 "bitflags 2.13.1",
 ]
 [[package]]
 name = "regex"
 version = "1.13.1"
@@ -2784,6 +3150,12 @@ dependencies = [
 "windows-sys 0.52.0",
 ]
 [[package]]
 name = "robust"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4e27ee8bb91ca0adcf0ecb116293afa12d393f9c2b9b9cd54d33e8078fe19839"
 [[package]]
 name = "roxmltree"
 version = "0.21.1"
@@ -2793,6 +3165,23 @@ dependencies = [
 "memchr",
 ]
 [[package]]
 name = "rstar"
 version = "0.12.2"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "421400d13ccfd26dfa5858199c30a5d76f9c54e0dba7575273025b43c5175dbb"
 dependencies = [
 "heapless",
 "num-traits",
 "smallvec",
 ]
 [[package]]
 name = "rustc-hash"
 version = "1.1.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "08d43f7aa6b08d49f382cde6a7982047c3426db949b1424bc4b7ec9ae12c6ce2"
 [[package]]
 name = "rustc-hash"
 version = "2.1.3"
@@ -2823,7 +3212,7 @@ version = "1.1.4"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b6fe4565b9518b83ef4f91bb47ce29620ca828bd32cb7e408f0062e9930ba190"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "errno",
 "libc",
 "linux-raw-sys",
@@ -2929,6 +3318,12 @@ dependencies = [
 "windows-sys 0.61.2",
 ]
 [[package]]
 name = "scopeguard"
 version = "1.2.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "94143f37725109f92c262ed2cf5e59bce7498c01bcc1502d7b9afe439a4e9f49"
 [[package]]
 name = "scroll"
 version = "0.13.0"
@@ -2959,7 +3354,7 @@ dependencies = [
 "crc",
 "log",
 "rand 0.9.5",
- "rustc-hash",
+ "rustc-hash 2.1.3",
 "slab",
 "thiserror 2.0.20",
 ]
@@ -2984,7 +3379,7 @@ version = "3.7.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b7f4bc775c73d9a02cde8bf7b2ec4c9d12743edf609006c7facc23998404cd1d"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "core-foundation",
 "core-foundation-sys",
 "libc",
@@ -3104,6 +3499,12 @@ version = "2.0.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f8fadd59c855ef2080decdef8ff161eb6661b86933c9d82e5ba29dc602a55aba"
 [[package]]
 name = "sif-itree"
 version = "0.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "d7f45b8998ced5134fb1d75732c77842a3e888f19c1ff98481822e8fbfbf930b"
 [[package]]
 name = "signal-hook-registry"
 version = "1.4.8"
@@ -3163,6 +3564,60 @@ dependencies = [
 "toml",
 ]
 [[package]]
 name = "skia-rs-codec"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "733be303d09c7e2bd0628dc1e592855d80e79a32c7f020f980ab0abe710d77a6"
 dependencies = [
 "gif",
 "jpeg-decoder",
 "jpeg-encoder",
 "parking_lot",
 "png",
 "skia-rs-core",
 "skia-rs-paint",
 "thiserror 2.0.20",
 ]
 [[package]]
 name = "skia-rs-core"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "88c10ce81ab452a6fa88e7228a5af713328e698b7100c2d021f58287a5370c49"
 dependencies = [
 "bitflags 2.13.1",
 "bytemuck",
 "getrandom 0.2.17",
 "glam",
 "smallvec",
 "thiserror 2.0.20",
 ]
 [[package]]
 name = "skia-rs-paint"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "f4b7ea0fc7fa887d5875e49809eabc3cbd9e6a0247930a9f6456ad4c59cedfb1"
 dependencies = [
 "bitflags 2.13.1",
 "naga",
 "skia-rs-core",
 "skia-rs-path",
 "thiserror 2.0.20",
 ]
 [[package]]
 name = "skia-rs-path"
 version = "0.3.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "1f928ca29bc3e26f46393048186bf64cf7eb7c39cc7176e8285a1828c601d7c0"
 dependencies = [
 "geo",
 "skia-rs-core",
 "smallvec",
 ]
 [[package]]
 name = "skia-safe"
 version = "0.99.0"
@@ -3170,7 +3625,7 @@ source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9f512ac418a64194842dd05566320805dad1c957c521039db2486fd6368865bc"
 dependencies = [
 "base64",
- "bitflags",
+ "bitflags 2.13.1",
 "percent-encoding",
 "skia-bindings",
 "skia-svg-macros",
@@ -3209,6 +3664,27 @@ dependencies = [
 "windows-sys 0.61.2",
 ]
 [[package]]
 name = "spade"
 version = "2.15.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9699399fd9349b00b184f5635b074f9ec93afffef30c853f8c875b32c0f8c7fa"
 dependencies = [
 "hashbrown 0.16.1",
 "num-traits",
 "robust",
 "smallvec",
 ]
 [[package]]
 name = "spirv"
 version = "0.3.0+sdk-1.3.268.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "eda41003dc44290527a59b13432d4a0379379fa074b70174882adfbdfd917844"
 dependencies = [
 "bitflags 2.13.1",
 ]
 [[package]]
 name = "spki"
 version = "0.7.3"
@@ -3349,6 +3825,15 @@ dependencies = [
 "xattr",
 ]
 [[package]]
 name = "termcolor"
 version = "1.4.1"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "06794f8f6c5c898b3275aebefa6b8a1cb24cd2c6c79397ab15774837a0bc5755"
 dependencies = [
 "winapi-util",
 ]
 [[package]]
 name = "thiserror"
 version = "1.0.69"
@@ -3566,7 +4051,7 @@ version = "0.6.11"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "4cfcf7e2740e6fc6d4d688b4ef00650406bb94adf4731e43c096c3a19fe40840"
 dependencies = [
- "bitflags",
+ "bitflags 2.13.1",
 "bytes",
 "futures-util",
 "http",
@@ -3645,6 +4130,18 @@ version = "1.0.24"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "e6e4313cd5fcd3dad5cafa179702e2b244f760991f45397d14d4ebf38247da75"
 [[package]]
 name = "unicode-width"
 version = "0.1.14"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "7dd6e30e90baa6f72411720665d41d89b9a3d039dc45b8faea1ddd07f617f6af"
 [[package]]
 name = "unicode-xid"
 version = "0.2.6"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "ebc1c04c71510c7f702b52b7c350734c9ff1295c464a03335b00bb84fc54f853"
 [[package]]
 name = "universal-hash"
 version = "0.5.1"
@@ -3699,9 +4196,19 @@ checksum = "bf3923a6f5c4c6382e0b653c4117f48d631ea17f38ed86e2a828e6f7412f5239"
 dependencies = [
 "getrandom 0.4.3",
 "js-sys",
 "uuid-rng-internal",
 "wasm-bindgen",
 ]
 [[package]]
 name = "uuid-rng-internal"
 version = "1.24.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "9dff7387287837acf196f2596a6216f94c555d947d5331e1cc48393131020119"
 dependencies = [
 "getrandom 0.4.3",
 ]
 [[package]]
 name = "vcpkg"
 version = "0.2.15"
@@ -3859,6 +4366,12 @@ dependencies = [
 "rustls-pki-types",
 ]
 [[package]]
 name = "weezl"
 version = "0.1.12"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "a28ac98ddc8b9274cb41bb4d9d4d5c425b6020c50c46f25559911905610b4a88"
 [[package]]
 name = "widestring"
 version = "1.2.1"
@@ -4144,7 +4657,7 @@ version = "0.6.0"
 source = "registry+https://github.com/rust-lang/crates.io-index"
 checksum = "b5f6765e852b9b4dc8e2a76843e4d64d1cea8e79bcde0b6901aea8e7c7f08282"
 dependencies = [
- "bit-vec",
+ "bit-vec 0.9.1",
 "time",
 ]
--- a/README.md
+++ b/README.md
@@ -62,7 +62,8 @@ The currently available opt-in codec backends are:
 | --- | --- | --- | --- |
 | Raw J2K and JP2 decoding/encoding through OpenJPEG | `libremetaverse/jpeg2000` | `cargo build -p libremetaverse --features jpeg2000` | OpenJPEG 2.5.4 or newer |
 | Raw J2K and JP2 decoding/encoding in pure Rust | `libremetaverse/rust-j2k` | `cargo build -p libremetaverse --no-default-features --features rust-j2k` | none |
-| BMP, GIF, ICO, JPEG, PNG, WBMP, and WebP decoding through Skia | `libremetaverse-imaging-skia/skia` | `cargo build -p libremetaverse-imaging-skia --features skia` | A matching rust-skia binary cache, or the documented native source-build tools |
+| BMP, GIF, ICO, JPEG, PNG, WBMP, and WebP decoding in pure Rust | `libremetaverse-imaging-skia/rust-skia` | `cargo build -p libremetaverse-imaging-skia --features rust-skia` | None |
 | BMP, GIF, ICO, JPEG, PNG, WBMP, and WebP decoding through native Skia | `libremetaverse-imaging-skia/skia` | `cargo build -p libremetaverse-imaging-skia --features skia` | A matching rust-skia binary cache, or the documented native source-build tools |
 | PCM to Ogg Vorbis encoding | `libremetaverse/vorbis` | `cargo build -p libremetaverse --features vorbis` | `vorbis_rs` 0.5.6 and its native encoder build prerequisites |
 Run their focused test suites with:
@@ -71,6 +72,7 @@ Run their focused test suites with:
 cargo test -p libremetaverse-imaging --features jpeg2000
 cargo test -p libremetaverse-imaging --no-default-features --features rust-j2k
 cargo test -p libremetaverse-imaging-skia --features skia
 cargo test -p libremetaverse-imaging-skia --features rust-skia
 cargo test -p libremetaverse --no-default-features --features vorbis
 ```
--- a/RUSTREWRITE.md
+++ b/RUSTREWRITE.md
@@ -404,7 +404,7 @@ MSRV, features, and licenses at adoption time.
 | `System.Net.Http` / WinHTTP | [`reqwest` 0.13.4](https://crates.io/crates/reqwest/0.13.4) | MSRV 1.85. Use rustls/default TLS deliberately, connection pooling, streaming bodies, and injected client/timeouts. |
 | JSON and general data mapping | [`serde` 1.0.229](https://crates.io/crates/serde/1.0.229), [`serde_json` 1.0.151](https://crates.io/crates/serde_json/1.0.151), [`serde_bytes` 0.11.19](https://crates.io/crates/serde_bytes/0.11.19) | Use only where the C# implementation is schema-driven JSON. Hand-write LLSD encodings. |
 | MessagePack 3.1.8 | [`rmp-serde` 1.3.1](https://crates.io/crates/rmp-serde/1.3.1), [`rmpv` 1.3.1](https://crates.io/crates/rmpv/1.3.1) | Golden byte vectors must prove integer widths, maps, extensions, and field ordering. |
-| UUID | [`uuid` 1.24.0](https://crates.io/crates/uuid/1.24.0) | Wrap it; do not expose dependency-specific endian assumptions as protocol behavior. |
+| UUID | [`uuid` 1.24.0](https://crates.io/crates/uuid/1.24.0) | Wrap it; do not expose dependency-specific endian assumptions as protocol behavior. WASM selects UUID's `rng-getrandom` adapter and `getrandom`'s Web Crypto-backed `wasm_js` feature while desktop targets retain operating-system entropy. |
 | byte buffers | [`bytes` 1.12.1](https://crates.io/crates/bytes/1.12.1), [`bytemuck` 1.25.2](https://crates.io/crates/bytemuck/1.25.2) | Prefer explicit endian reads. `bytemuck` is only for proven POD layouts, never untrusted variable packets. |
 | vector/matrix math | [`glam` 0.33.3](https://crates.io/crates/glam/0.33.3) | Keep compatibility newtypes to control component order, precision, equality, and serialization. |
 | flags | [`bitflags` 2.13.1](https://crates.io/crates/bitflags/2.13.1) | Retain unknown bits from newer grids. |
@@ -417,6 +417,7 @@ MSRV, features, and licenses at adoption time.
 | CoreJ2K 2.3.3.91 | system [OpenJPEG](https://www.openjpeg.org/) 2.5.4+ through the private `libremetaverse-openjpeg` adapter | Opt-in `jpeg2000` feature; checked-in minimal bindings avoid a libclang build dependency. Bounded memory streams and header validation isolate native code. Golden tests cover channel order, alpha, 16-bit precision, dimensions, discard levels, lossless/lossy modes, and malformed input. |
 | CoreJ2K pure-Rust extension | [`j2k`](https://crates.io/crates/j2k) 0.8.1 | Independent opt-in `rust-j2k` feature with no native library. The safe adapter provides J2K/JP2 encode/decode, native component preservation, bounded streams and allocations, reduced resolution, progressive quality layers, strict/permissive truncation, and OpenJPEG interoperability. |
 | SkiaSharp 4.150.1 | [`skia-safe` 0.99.0](https://crates.io/crates/skia-safe/0.99.0) | Adopted behind the opt-in `skia` feature. Target-specific official binary-cache feature sets provide BMP/GIF/ICO/JPEG/PNG/WBMP/WebP decoding on macOS, Linux, and Windows; checked owned buffers keep Skia types out of the core image API. |
 | SkiaSharp pure-Rust extension | [`skia-rs-codec` 0.3.0](https://crates.io/crates/skia-rs-codec/0.3.0) and [`image-webp` 0.2.4](https://crates.io/crates/image-webp/0.2.4) | Independent opt-in `rust-skia` feature with no native codec. Default features stay disabled: pure-Rust PNG/JPEG/GIF plus built-in BMP/ICO/WBMP come from `skia-rs-codec`, and pure-Rust WebP comes from `image-webp` instead of the native `libwebp-sys` path. |
 | Pfim 0.11.4 | [`image` 0.25.10](https://crates.io/crates/image/0.25.10), [`ddsfile` 0.6.0](https://crates.io/crates/ddsfile/0.6.0) | `image` covers TGA and common DDS decoding; `ddsfile` exposes DDS container details. Golden files decide whether both are needed. |
 | OggVorbisEncoder 1.2.2 | [`vorbis_rs` 0.5.6](https://crates.io/crates/vorbis_rs/0.5.6) | BSD-3-Clause, MSRV 1.82, backed by C libraries. Feature-gate native audio encoding. |
 | SIPSorcery 8.0.23 | [`str0m` 0.22.0](https://crates.io/crates/str0m/0.22.0), [`cpal` 0.18.1](https://crates.io/crates/cpal/0.18.1), system libopus 1.3+ through `libremetaverse-opus` | The private safe adapter avoids the unmaintained `audiopus_sys` binding. Validate SDP, ICE, data-channel framing, audio formats, device hotplug, and native libopus deployment separately. Do not claim parity from successful compilation. |
@@ -444,7 +445,7 @@ The current adopted set is:
 | Async and HTTP | `tokio`, `futures-channel`, `futures-util`, `reqwest` |
 | Wire data and parsing | `base64`, `serde`, `serde_json`, `roxmltree`, `regex`, `unicode-general-category` |
 | Identity, hashing, and platform facts | `uuid`, `getrandom`, `md-5`, `sha1`, `sha2`, `mac_address2`, `os_info` |
-| Archives, images, and audio | `flate2`, `tar`, `bcdec_rs`, `skia-safe`, `hound`, `vorbis_rs`, `str0m`, `cpal` |
+| Archives, images, and audio | `flate2`, `tar`, `bcdec_rs`, `skia-safe`, `skia-rs-codec`, `image-webp`, `hound`, `vorbis_rs`, `str0m`, `cpal` |
 | Code generation, program CLI, and artifact inspection | `syn`, `prettyplease`, `clap`, `goblin` |
 | Build and compatibility-test support | `pkg-config`, `vcpkg`, `stats_alloc` |
@@ -518,10 +519,12 @@ and invalid-dimension tests match the original.
 ### 5.4 `libremetaverse-imaging-skia`
-Implement `SkiaTextureCodec` as an optional adapter with `skia-safe`. Convert at
+Implement `SkiaTextureCodec` as an optional adapter with `skia-safe`, plus an
-the boundary to/from `ManagedImage`; never expose `skia_safe` types in the core
+independently selectable `RustSkiaTextureCodec` using `skia-rs-codec` and
-trait. CI must cover macOS, Linux, and Windows or explicitly document unsupported
+`image-webp`. Convert at the boundary to/from `ManagedImage`; never expose
-targets. Validate native binary provenance and packaging.
+backend-specific types in the core trait. CI must cover macOS, Linux, Windows,
 and the Rust-only WASM compile boundary. Validate native binary provenance and
 the locked Rust dependency/license inventory.
 ### 5.5 `libremetaverse-prim-mesher`
--- a/api/SEMVER-AUDIT.md
+++ b/api/SEMVER-AUDIT.md
@@ -24,7 +24,7 @@ The compatibility source is pinned at [`2aa70bb68513b39795da5d13c88f31b86e85a3ba
 | `libremetaverse-types` | 45 | 942 | 887 | none | `532cdfc175a60cb6ab109b2c43cfdda1d89cf0aadffccbcd7c9b18e1a3215bee` |
 | `libremetaverse-structured-data` | 16 | 295 | 304 | none | `b1c2ca9a683efe92ea22293384189f9e7c9a1926860893ab78c41829e641a8c3` |
 | `libremetaverse-imaging` | 3 | 20 | 70 | default, jpeg2000, rust-j2k | `19423a5aec60e38d547b809ab947e7aff6366318f97f69cde824f57ae6194c0e` |
-| `libremetaverse-imaging-skia` | 1 | 3 | 13 | default, skia | `a6a1445725410a036204496ad4953c84dcfea1e6a00390ce4e10d12d36f2876b` |
+| `libremetaverse-imaging-skia` | 1 | 3 | 17 | default, rust-skia, skia | `855a181b77413a1e5f0094b1581971fd5e0a4d93fadb5f83d54f82a7ba8ee71f` |
 | `libremetaverse-prim-mesher` | 17 | 207 | 117 | none | `dde798e86c485948f1d67e093f8194a76082101416516df3f8dca4de04c2d415` |
 | `libremetaverse-rendering-simple` | 1 | 6 | 12 | none | `4dc284ea0abb16de63494435758c8b7c5eeb57a80d2e32a141e488e5861f2fad` |
 | `libremetaverse-rendering-mesh-foundry` | 1 | 14 | 25 | none | `3689f6b454061fdae699d5fb66a11482909fa25bda398e26c38327995a9e2896` |
@@ -46,7 +46,7 @@ The exact mapping, exported-marker, feature, and normalized Rust declaration has
 - .NET events become `subscribe_*` calls returning an owned `Subscription`; callbacks are `Send + Sync` and dispatch outside internal locks.
 - `IDisposable` becomes explicit idempotent shutdown plus `Drop`; cancellation remains a typed `Error::Cancelled`.
 - Closed C# enums retain fixed discriminants and are SemVer-breaking to extend; flags retain unknown bits, while public Rust error enums are `non_exhaustive`.
- Optional native backends remain feature-gated (`jpeg2000`, `skia`, `vorbis`, `real-audio`); default and empty-default sets are part of the baseline.
+- Optional native and pure-Rust backends remain feature-gated (`jpeg2000`, `rust-j2k`, `skia`, `rust-skia`, `vorbis`, `real-audio`); default and empty-default sets are part of the baseline.
 - Capability HTTP injection uses project-owned `HttpMessageHandler`, `CapsHttpLimits`, and `with_native_transport`; the internal `reqwest` client is not part of the public surface.
 - External C# signature types map to core/std, adopted cross-platform crates, or project-owned boundary types; no third-party crate path leaks through mapped signatures or public Rust declarations.
--- a/api/SEMVER-BASELINE.json
+++ b/api/SEMVER-BASELINE.json
@@ -20,7 +20,7 @@
  "type_mapping_sha256": "21025889c62b0f8666a2dda46a03ff4f28931f51156927822a1c04e97b49f221",
  "member_mapping_sha256": "cd99420643c665ea393dd59418c33fb00f97f7030e71540c00b2b27470abb1d4",
  "exported_mapping_sha256": "5b8a502ce229d26732744f2b44c029fc4a86b403966dc2f9b4a1c913a7b242b9",
-  "rust_declaration_sha256": "687d3d29bb0e79651881ffdda962be21df8716a4d96417175611541d0fe27a8e",
+  "rust_declaration_sha256": "b2ba1ccf9293ac94164e593546891a2a122b1e5997ee4ecc2de86ef5eb0d866e",
  "crates": [
    {
      "name": "libremetaverse",
@@ -87,14 +87,21 @@
      "version": "0.0.1",
      "features": {
        "default": [],
        "rust-skia": [
          "dep:image-webp",
          "dep:skia-rs-codec",
          "skia-rs-codec/gif",
          "skia-rs-codec/jpeg",
          "skia-rs-codec/png"
        ],
        "skia": [
          "dep:skia-safe"
        ]
      },
      "mapped_types": 1,
      "mapped_members": 3,
-      "public_declarations": 13,
+      "public_declarations": 17,
-      "declaration_sha256": "a6a1445725410a036204496ad4953c84dcfea1e6a00390ce4e10d12d36f2876b"
+      "declaration_sha256": "855a181b77413a1e5f0094b1581971fd5e0a4d93fadb5f83d54f82a7ba8ee71f"
    },
    {
      "name": "libremetaverse-prim-mesher",
--- a/ci/ci-coverage.json
+++ b/ci/ci-coverage.json
@@ -13,6 +13,7 @@
    "minimal-features",
    "jpeg2000",
    "rust-j2k",
    "rust-skia",
    "skia-binary",
    "program-offline-smoke",
    "clippy",
@@ -104,8 +105,8 @@
      "workflow": "skia.yml",
      "responsibility": "Default and Skia feature tests plus package listing",
      "destination": "required",
-      "checks": ["skia-binary", "workspace-tests"],
+      "checks": ["rust-skia", "skia-binary", "workspace-tests"],
-      "rationale": "The required gate proves the exact ARM64 GNU archive is installed and forbids source compilation."
+      "rationale": "A dedicated dependency-free job tests the Rust-only codec graph, while the required gate proves the exact ARM64 GNU archive is installed and forbids source compilation."
    },
    {
      "workflow": "supply-chain.yml",
--- a/ci/dependency-policy.json
+++ b/ci/dependency-policy.json
@@ -2,7 +2,7 @@
  "schema": 1,
  "msrv": "1.96.0",
  "current": "stable",
-  "reviewed_on": "2026-08-12",
+  "reviewed_on": "2026-08-13",
  "review_by": "2026-11-11",
  "direct": [
    { "name": "base64", "versions": ["0.22.1"], "purpose": "LLSD, login, asset, and protocol base64 encoding", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`base64`" },
@@ -15,6 +15,7 @@
    { "name": "getrandom", "versions": ["0.4.3"], "purpose": "Operating-system entropy for protocol identifiers", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`getrandom`" },
    { "name": "goblin", "versions": ["0.10.5"], "purpose": "Cross-platform ELF, PE, and Mach-O release artifact inspection", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`goblin`" },
    { "name": "hound", "versions": ["3.5.1"], "purpose": "Bounded PCM WAV parsing for WebRTC playback", "maintenance": "stable", "transitive_cost": "low", "native": false, "rewrite_anchor": "`hound`" },
    { "name": "image-webp", "versions": ["0.2.4"], "purpose": "Opt-in pure-Rust bounded WebP image decoding", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`image-webp`" },
    { "name": "j2k", "versions": ["0.8.1"], "purpose": "Opt-in pure-Rust bounded JPEG 2000 and JP2 encoding and decoding", "maintenance": "active", "transitive_cost": "medium", "native": false, "rewrite_anchor": "`j2k`" },
    { "name": "mac_address2", "versions": ["2.0.2"], "purpose": "Cross-platform machine identity compatibility input", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`mac_address2`" },
    { "name": "md-5", "versions": ["0.10.6"], "purpose": "Legacy protocol checksum compatibility", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`md-5`" },
@@ -29,6 +30,7 @@
    { "name": "sha1", "versions": ["0.10.7"], "purpose": "Legacy protocol hash compatibility", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`sha1`" },
    { "name": "sha2", "versions": ["0.11.0"], "purpose": "Manifest integrity and protocol hashing", "maintenance": "active", "transitive_cost": "low", "native": false, "rewrite_anchor": "`sha2`" },
    { "name": "skia-safe", "versions": ["0.99.0"], "purpose": "Opt-in cross-platform Skia image decoding", "maintenance": "monitored-native", "transitive_cost": "high", "native": true, "rewrite_anchor": "`skia-safe`" },
    { "name": "skia-rs-codec", "versions": ["0.3.0"], "purpose": "Opt-in pure-Rust BMP, GIF, ICO, JPEG, PNG, and WBMP image decoding", "maintenance": "active", "transitive_cost": "high", "native": false, "rewrite_anchor": "`skia-rs-codec`" },
    { "name": "stats_alloc", "versions": ["0.1.10"], "purpose": "Allocation-budget compatibility tests, concurrency leak audits, and reproducible performance evidence", "maintenance": "stable", "transitive_cost": "low", "native": false, "rewrite_anchor": "`stats_alloc`" },
    { "name": "str0m", "versions": ["0.22.0"], "purpose": "Native Rust ICE, DTLS, SRTP, RTP, and SCTP WebRTC transport", "maintenance": "active", "transitive_cost": "high", "native": false, "rewrite_anchor": "`str0m`" },
    { "name": "syn", "versions": ["2.0.119"], "purpose": "Syntax validation for generated Rust sources", "maintenance": "active", "transitive_cost": "medium", "native": false, "rewrite_anchor": "`syn`" },
@@ -40,6 +42,8 @@
    { "name": "vorbis_rs", "versions": ["0.5.6"], "purpose": "Opt-in Ogg Vorbis asset encoding", "maintenance": "monitored-native", "transitive_cost": "medium", "native": true, "rewrite_anchor": "`vorbis_rs`" }
  ],
  "approved_duplicates": [
    { "name": "bit-vec", "versions": ["0.8.0", "0.9.1"], "reason": "The pinned skia-rs shader parser and current WebRTC certificate stack require adjacent bit-vector API lines." },
    { "name": "bitflags", "versions": ["1.3.2", "2.13.1"], "reason": "The pinned pure-Rust PNG codec remains on bitflags 1 while the rest of the workspace uses bitflags 2." },
    { "name": "block-buffer", "versions": ["0.10.4", "0.12.1"], "reason": "RustCrypto digest 0.10 and 0.11 consumers have not unified their block-buffer major version." },
    { "name": "cfg_aliases", "versions": ["0.1.1", "0.2.2"], "reason": "The target-specific native stacks use different nix-generation build helpers." },
    { "name": "chacha20", "versions": ["0.9.1", "0.10.1"], "reason": "The WebRTC crypto and current random-number stacks require different RustCrypto generations." },
@@ -48,12 +52,14 @@
    { "name": "crypto-common", "versions": ["0.1.7", "0.2.2"], "reason": "Legacy protocol hashes and current SHA-2 intentionally span RustCrypto digest generations." },
    { "name": "digest", "versions": ["0.10.7", "0.11.3"], "reason": "MD5, SHA-1, and WebRTC use digest 0.10 while manifest SHA-2 uses the audited 0.11 API." },
    { "name": "getrandom", "versions": ["0.2.17", "0.3.4", "0.4.3"], "reason": "WebRTC crypto, transitive rand, and direct UUID entropy consumers span three compatible APIs." },
    { "name": "hashbrown", "versions": ["0.16.1", "0.17.1"], "reason": "The pinned skia-rs geometry and shader dependencies have not unified their hash table minor line." },
    { "name": "jni-sys", "versions": ["0.3.1", "0.4.1"], "reason": "CPAL Android NDK support and rustls Android certificate verification require different JNI bindings." },
    { "name": "nix", "versions": ["0.28.0", "0.31.3"], "reason": "Machine-address and operating-system reporting crates have not unified their Unix API generation." },
    { "name": "nom", "versions": ["7.1.3", "8.0.0"], "reason": "Skia bindgen tooling remains on nom 7 while the native WebRTC stack uses nom 8." },
    { "name": "r-efi", "versions": ["5.3.0", "6.0.0"], "reason": "The three resolved getrandom generations require two WASI EFI interface generations." },
    { "name": "rand", "versions": ["0.9.5", "0.10.2"], "reason": "WebRTC protocol crates use rand 0.9 while target-specific dependencies have adopted rand 0.10." },
    { "name": "rand_core", "versions": ["0.6.4", "0.9.5", "0.10.1"], "reason": "DTLS elliptic curves and the two resolved rand generations require distinct rand_core APIs." },
    { "name": "rustc-hash", "versions": ["1.1.0", "2.1.3"], "reason": "The pinned skia-rs shader parser remains on rustc-hash 1 while existing workspace parsers use version 2." },
    { "name": "sha2", "versions": ["0.10.9", "0.11.0"], "reason": "WebRTC crypto still requires SHA-2 0.10 while MetaCrate integrity code directly uses 0.11." },
    { "name": "shlex", "versions": ["1.3.0", "2.0.1"], "reason": "Skia bindgen and current native C compilation helpers use different shell-token parsers." },
    { "name": "syn", "versions": ["2.0.119", "3.0.3"], "reason": "MetaCrate code generation uses syn 2 while current derive macro dependencies use syn 3." },
--- a/ci/release-matrix.json
+++ b/ci/release-matrix.json
@@ -42,12 +42,12 @@
      "execution": "native",
      "toolchain": "1.96.0",
      "target": "x86_64-unknown-linux-gnu",
-      "feature_sets": ["no-default-features", "rust-j2k"],
+      "feature_sets": ["no-default-features", "rust-j2k", "rust-skia"],
      "prerequisites": ["libopus-1.3"],
      "commands": [
        {
          "label": "Compile the portable public crates on the declared MSRV",
-          "args": ["check", "--locked", "-j", "1", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
+          "args": ["check", "--locked", "-j", "1", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k,libremetaverse-imaging-skia/rust-skia", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
        },
        {
          "label": "Compile the safe native Opus boundary and WebRTC voice on the declared MSRV",
@@ -106,7 +106,7 @@
      "execution": "native",
      "toolchain": "stable",
      "target": "x86_64-unknown-linux-gnu",
-      "feature_sets": ["all-features", "dds-bc67", "jpeg2000", "rust-j2k", "skia", "vorbis", "real-audio", "tests"],
+      "feature_sets": ["all-features", "dds-bc67", "jpeg2000", "rust-j2k", "rust-skia", "skia", "vorbis", "real-audio", "tests"],
      "prerequisites": ["openjpeg-2.5.4", "skia-safe-0.99.0", "libopus-1.3", "alsa-1.2", "vorbis-rs-0.5.6"],
      "commands": [
        {
@@ -125,10 +125,18 @@
          "label": "Test OpenJPEG and pure-Rust JPEG 2000 interoperability",
          "args": ["test", "-p", "libremetaverse-imaging", "--no-default-features", "--features", "jpeg2000,rust-j2k", "--locked", "-j", "1"]
        },
        {
          "label": "Test the pure-Rust Skia-compatible feature independently",
          "args": ["test", "-p", "libremetaverse-imaging-skia", "--no-default-features", "--features", "rust-skia", "--locked", "-j", "1"]
        },
        {
          "label": "Test the Skia feature independently",
          "args": ["test", "-p", "libremetaverse-imaging-skia", "--no-default-features", "--features", "skia", "--locked", "-j", "1"]
        },
        {
          "label": "Test native Skia and pure-Rust codec interoperability",
          "args": ["test", "-p", "libremetaverse-imaging-skia", "--no-default-features", "--features", "skia,rust-skia", "--locked", "-j", "1"]
        },
        {
          "label": "Test the Vorbis feature independently",
          "args": ["test", "-p", "libremetaverse", "--no-default-features", "--features", "vorbis", "--lib", "--locked", "-j", "1", "--", "asset_pipeline_semantics"]
@@ -170,12 +178,12 @@
      "execution": "cross",
      "toolchain": "stable",
      "target": "x86_64-pc-windows-gnu",
-      "feature_sets": ["no-default-features", "dds-bc67", "rust-j2k"],
+      "feature_sets": ["no-default-features", "dds-bc67", "rust-j2k", "rust-skia"],
      "prerequisites": [],
      "commands": [
        {
          "label": "Cross-check portable crates for Windows GNU",
-          "args": ["check", "--locked", "-j", "1", "--target", "x86_64-pc-windows-gnu", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
+          "args": ["check", "--locked", "-j", "1", "--target", "x86_64-pc-windows-gnu", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k,libremetaverse-imaging-skia/rust-skia", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
        }
      ]
    },
@@ -186,12 +194,12 @@
      "execution": "cross",
      "toolchain": "stable",
      "target": "x86_64-apple-darwin",
-      "feature_sets": ["no-default-features", "dds-bc67", "rust-j2k"],
+      "feature_sets": ["no-default-features", "dds-bc67", "rust-j2k", "rust-skia"],
      "prerequisites": [],
      "commands": [
        {
          "label": "Cross-check portable crates for macOS",
-          "args": ["check", "--locked", "-j", "1", "--target", "x86_64-apple-darwin", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
+          "args": ["check", "--locked", "-j", "1", "--target", "x86_64-apple-darwin", "--all-targets", "--no-default-features", "--features", "libremetaverse-imaging/rust-j2k,libremetaverse-imaging-skia/rust-skia", "-p", "libremetaverse-types", "-p", "libremetaverse-structured-data", "-p", "libremetaverse-imaging", "-p", "libremetaverse-imaging-skia", "-p", "libremetaverse-prim-mesher", "-p", "libremetaverse-lsl-tools", "-p", "libremetaverse-rlv", "-p", "metacrate-ci-matrix"]
        }
      ]
    }
--- a/crates/libremetaverse-imaging-skia/Cargo.toml
+++ b/crates/libremetaverse-imaging-skia/Cargo.toml
@@ -10,10 +10,13 @@ description = "Optional Skia image decoder for the MetaCrate LibreMetaverse rewr
 [features]
 default = []
 skia = ["dep:skia-safe"]
 rust-skia = ["dep:image-webp", "dep:skia-rs-codec", "skia-rs-codec/gif", "skia-rs-codec/jpeg", "skia-rs-codec/png"]
 [dependencies]
 libremetaverse-imaging = { version = "0.0.1", path = "../libremetaverse-imaging" }
 libremetaverse-types = { version = "0.0.1", path = "../libremetaverse-types" }
 image-webp = { version = "=0.2.4", optional = true }
 skia-rs-codec = { version = "=0.3.0", default-features = false, optional = true }
 # rust-skia publishes WebP-capable binary caches with Vulkan on Linux/Windows
 # and without Vulkan on macOS. Matching those sets avoids an hours-long Skia
--- a/crates/libremetaverse-imaging-skia/README.md
+++ b/crates/libremetaverse-imaging-skia/README.md
@@ -6,10 +6,43 @@ exposes a `skia-safe` type and never discovers or links Skia.
 ## Features and formats
-The default feature set has no Skia dependency. `SkiaTextureCodec::decode`
+The default feature set has no Skia dependency. `SkiaTextureCodec::decode` and
-returns a typed `InvalidOperation` error in that configuration, while conversion
+`RustSkiaTextureCodec::decode` return a typed `InvalidOperation` error when
-from the checked project-owned `backend::SKBitmap` remains available for tests
+their respective feature is disabled, while conversion from the checked
-and callers that already own decoded pixels.
+project-owned `backend::SKBitmap` remains available for tests and callers that
 already own decoded pixels.
 For a fully Rust implementation, enable:
 ```sh
 cargo test -p libremetaverse-imaging-skia --no-default-features --features rust-skia
 ```
 `rust-skia` pins [`skia-rs-codec` 0.3.0](https://github.com/rust-skia/skia-rs)
 with default features disabled and only
 its pure-Rust PNG, JPEG, and GIF codecs selected. Its `webp` feature is
 deliberately disabled because that feature selects `libwebp-sys`; WebP is
 instead decoded by the separately pinned, safe-Rust
 [`image-webp` 0.2.4](https://github.com/image-rs/image-webp) crate.
 BMP, ICO, and WBMP are built into `skia-rs-codec`. The resulting normal/build
 graph has no codec `-sys` crate, C/C++ compilation, CMake, system-library
 lookup, or binary download.
 The locked transitive codec lines are `png` 0.17.16, `jpeg-decoder` 0.3.2,
 `jpeg-encoder` 0.6.1 (the upstream JPEG feature couples decode and encode), and
 `gif` 0.13.3. `skia-rs-codec` also brings its ordinary Rust core, paint, and
 path crates; their build helpers only select Rust cfgs and compile no native
 code. A source audit of the locked `skia-rs-*` crates found no unsafe blocks,
 and `image-webp` declares `forbid(unsafe_code)`. MetaCrate itself continues to
 compile with workspace `unsafe_code = "forbid"`.
 `RustSkiaTextureCodec` implements the same `ITextureCodec` abstraction and
 decodes BMP, GIF, ICO, baseline/progressive JPEG, interlaced PNG, WBMP, and
 lossless/lossy/animated WebP. GIF and WebP return frame one composited on the
 logical canvas; ICO chooses its largest valid entry. Both Skia features may be
 enabled together, and each codec remains independently constructible.
 The graph builds on the workspace Rust 1.96 MSRV; both selected direct codecs
 declare older compatible Rust floors.
 Enable native decoding with:
@@ -17,7 +50,7 @@ Enable native decoding with:
 cargo test -p libremetaverse-imaging-skia --features skia
 ```
-The `skia` feature decodes the CPU codec formats supported by the pinned
+The native `skia` feature decodes the CPU codec formats supported by the pinned
 rust-skia release: BMP, GIF, ICO, JPEG, PNG, WBMP, and WebP. Input is buffered
 to at most 64 MiB. Dimensions are rejected before native pixel allocation when
 they exceed the core 16,777,216-pixel limit, and decoded storage uses checked
@@ -31,6 +64,25 @@ alpha at this boundary. RGB565, BGRA8888, RGBA8888, RGBA/BGRA1010102, Gray8,
 Alpha8, row padding, and the reference byte-width fallback retain the pinned
 C# channel and rounding rules.
 Both paths accept any `ReadWrite + Send` stream and stop buffering after 64
 MiB plus one sentinel byte. The pure-Rust path probes encoded dimensions before
 codec pixel allocation and enforces the shared 16,777,216-pixel ceiling; WebP
 also receives an explicit decoder memory limit. Checked dimensions, strides,
 buffer sizes, and fallible project-owned allocations turn malformed,
 truncated, oversized, and allocation failures into typed errors. Decoded rows
 have a top-left origin and premultiplied native samples are normalized to
 straight alpha at the shared `ManagedImage` boundary.
 The pure-Rust graph has identical code on Linux, Windows, macOS, and WASM and
 does not call platform APIs. Checked static fixtures cover top-down/bottom-up
 BMP, palette/offset GIF, largest-entry ICO, baseline/progressive JPEG,
 interlaced palette PNG, multibyte WBMP, lossless-alpha/lossy WebP, malformed and
 oversized inputs, and concurrent decode/drop. Gitea runs the `rust-skia` suite
 in a dedicated `ubuntu-latest` job that installs no native codec prerequisites.
 `image-webp` 0.2's animated-canvas blend fast path rounds fully opaque nonzero
 samples one low; the bounded adapter corrects that single upstream edge so the
 checked first-frame planes remain byte-identical to native Skia.
 ## Binary cache and source builds
 `skia-safe` 0.99.0 downloads an official prebuilt Skia archive when the target
@@ -66,3 +118,8 @@ explicitly.
 is BSD-3-Clause licensed. Official binary-cache archives contain compiled Skia.
 Products that redistribute the resulting native artifacts must preserve the
 applicable MIT and BSD notices and audit the exact archive they ship.
 `skia-rs-codec` is MIT OR Apache-2.0 and `image-webp` is MIT OR Apache-2.0.
 They are ordinary Rust source dependencies recorded in `Cargo.lock`; generated
 dependency notices and the distribution manifest bind their crates.io checksums
 and license texts for source and binary redistribution.
--- a/crates/libremetaverse-imaging-skia/src/lib.rs
+++ b/crates/libremetaverse-imaging-skia/src/lib.rs
@@ -1,7 +1,7 @@
 //! Optional Skia imaging adapter corresponding to `LibreMetaverse.Imaging.Skia`.
 //!
-//! Enable `skia` for bounded `BMP`, `GIF`, `ICO`, `JPEG`, `PNG`, `WBMP`, and
+//! Enable `skia` or the fully native-Rust `rust-skia` alternative for bounded
-//! `WebP` decoding.
+//! `BMP`, `GIF`, `ICO`, `JPEG`, `PNG`, `WBMP`, and `WebP` decoding.
 //! The default build remains inert. See the crate README for native cache,
 //! source-build, licensing, and cross-platform prerequisite details.
@@ -15,6 +15,7 @@ mod skia_codec;
 pub use generated::*;
 pub use libremetaverse_imaging as imaging;
 pub use libremetaverse_types::Error;
 pub use skia_codec::RustSkiaTextureCodec;
 impl libremetaverse_imaging::ITextureCodec for SkiaTextureCodec {
    fn decode(
@@ -24,3 +25,12 @@ impl libremetaverse_imaging::ITextureCodec for SkiaTextureCodec {
        Self::decode(self, stream)
    }
 }
 impl libremetaverse_imaging::ITextureCodec for RustSkiaTextureCodec {
    fn decode(
        &self,
        stream: Box<dyn libremetaverse_types::compat::ReadWrite + Send>,
    ) -> Result<libremetaverse_imaging::ManagedImage, Error> {
        Self::decode(self, stream)
    }
 }
--- a/crates/libremetaverse-imaging-skia/src/skia_codec.rs
+++ b/crates/libremetaverse-imaging-skia/src/skia_codec.rs
@@ -2,17 +2,24 @@
 use crate::Error;
 use crate::backend::{SKAlphaType, SKBitmap, SKColorType};
-#[cfg(feature = "skia")]
+#[cfg(any(feature = "rust-skia", feature = "skia"))]
 use libremetaverse_imaging::{DEFAULT_MAX_ENCODED_BYTES, DEFAULT_MAX_PIXELS};
 use libremetaverse_imaging::{ManagedImage, ManagedImageImageChannels};
 use libremetaverse_types::compat::ReadWrite;
-#[cfg(feature = "skia")]
+#[cfg(any(feature = "rust-skia", feature = "skia"))]
 use std::io::Read;
 /// Optional Skia-backed decoder and format-neutral bitmap converter.
 #[derive(Clone, Copy, Debug, Default)]
 pub struct SkiaTextureCodec;
 /// Pure-Rust alternative to [`SkiaTextureCodec`] with the same image boundary.
 ///
 /// Enable the `rust-skia` feature to decode the common Skia codec formats
 /// without a native library, build script, system package lookup, or download.
 #[derive(Clone, Copy, Debug, Default)]
 pub struct RustSkiaTextureCodec;
 impl SkiaTextureCodec {
    /// Creates the stateless codec adapter.
    ///
@@ -33,17 +40,7 @@ impl SkiaTextureCodec {
    pub fn decode(&self, mut stream: Box<dyn ReadWrite + Send>) -> Result<ManagedImage, Error> {
        #[cfg(feature = "skia")]
        {
-            let mut encoded = Vec::new();
+            let encoded = read_bounded(&mut stream)?;
            Read::by_ref(&mut stream)
                .take((DEFAULT_MAX_ENCODED_BYTES + 1) as u64)
                .read_to_end(&mut encoded)
                .map_err(|_| Error::InvalidOperation)?;
            if encoded.is_empty() {
                return Err(Error::InvalidOperation);
            }
            if encoded.len() > DEFAULT_MAX_ENCODED_BYTES {
                return Err(Error::Argument);
            }
            decode_with_skia(&encoded)
        }
        #[cfg(not(feature = "skia"))]
@@ -65,6 +62,55 @@ impl SkiaTextureCodec {
    }
 }
 impl RustSkiaTextureCodec {
    /// Creates the stateless pure-Rust codec adapter.
    ///
    /// # Errors
    ///
    /// This fixed compatibility constructor cannot fail.
    pub const fn new() -> Result<Self, Error> {
        Ok(Self)
    }
    /// Decodes a bounded stream with Rust-only BMP, GIF, ICO, JPEG, PNG,
    /// WBMP, and WebP codecs.
    ///
    /// # Errors
    ///
    /// With `rust-skia`, returns [`Error::Argument`] for an input or decoded
    /// canvas above the documented limits and [`Error::InvalidOperation`] for
    /// malformed or unsupported images. Without the feature it returns
    /// [`Error::InvalidOperation`].
    pub fn decode(&self, mut stream: Box<dyn ReadWrite + Send>) -> Result<ManagedImage, Error> {
        #[cfg(feature = "rust-skia")]
        {
            let encoded = read_bounded(&mut stream)?;
            decode_with_rust_skia(&encoded)
        }
        #[cfg(not(feature = "rust-skia"))]
        {
            let _ = &mut stream;
            Err(Error::InvalidOperation)
        }
    }
 }
 #[cfg(any(feature = "rust-skia", feature = "skia"))]
 fn read_bounded(stream: &mut (dyn ReadWrite + Send)) -> Result<Vec<u8>, Error> {
    let mut encoded = Vec::new();
    stream
        .take((DEFAULT_MAX_ENCODED_BYTES + 1) as u64)
        .read_to_end(&mut encoded)
        .map_err(|_| Error::InvalidOperation)?;
    if encoded.is_empty() {
        return Err(Error::InvalidOperation);
    }
    if encoded.len() > DEFAULT_MAX_ENCODED_BYTES {
        return Err(Error::Argument);
    }
    Ok(encoded)
 }
 // Keeping the format branches together makes comparison with the pinned C#
 // color switch auditable and prevents subtly different indexing paths.
 #[allow(clippy::too_many_lines)]
@@ -238,6 +284,404 @@ fn normalize_10bit_alpha(
    (normalize(red), normalize(green), normalize(blue))
 }
 #[cfg(feature = "rust-skia")]
 fn decode_with_rust_skia(encoded: &[u8]) -> Result<ManagedImage, Error> {
    use skia_rs_codec::{ImageDecoder, ImageFormat};
    let format = if wbmp_dimensions(encoded).is_ok() {
        ImageFormat::Wbmp
    } else {
        ImageFormat::from_magic(encoded)
    };
    if format == ImageFormat::WebP {
        return decode_webp_with_rust(encoded);
    }
    if !matches!(
        format,
        ImageFormat::Bmp
            | ImageFormat::Gif
            | ImageFormat::Ico
            | ImageFormat::Jpeg
            | ImageFormat::Png
            | ImageFormat::Wbmp
    ) {
        return Err(Error::InvalidOperation);
    }
    let (width, height) = match format {
        ImageFormat::Gif => gif_dimensions(encoded)?,
        ImageFormat::Ico => ico_dimensions(encoded)?,
        ImageFormat::Wbmp => wbmp_dimensions(encoded)?,
        _ => skia_rs_codec::get_image_dimensions(encoded).map_err(|_| Error::InvalidOperation)?,
    };
    validate_dimensions(width, height)?;
    let decoded = if format == ImageFormat::Wbmp {
        skia_rs_codec::WbmpDecoder::new().decode_bytes(encoded)
    } else {
        skia_rs_codec::decode_image(encoded)
    }
    .map_err(|_| Error::InvalidOperation)?;
    validate_dimensions(decoded.width(), decoded.height())?;
    if decoded.width() != width || decoded.height() != height {
        return Err(Error::InvalidOperation);
    }
    let width_usize = usize::try_from(width).map_err(|_| Error::Argument)?;
    if decoded.row_bytes() != width_usize.checked_mul(4).ok_or(Error::Argument)? {
        return Err(Error::InvalidOperation);
    }
    let source_pixels = decoded.peek_pixels().ok_or(Error::InvalidOperation)?;
    let grayscale = match format {
        ImageFormat::Jpeg => jpeg_is_grayscale(encoded)?,
        ImageFormat::Png => encoded.get(25) == Some(&0),
        ImageFormat::Wbmp => true,
        _ => false,
    };
    let (row_bytes, color_type, alpha_type, pixels) = if grayscale {
        let pixel_count = width_usize
            .checked_mul(usize::try_from(height).map_err(|_| Error::Argument)?)
            .ok_or(Error::Argument)?;
        let mut gray = Vec::new();
        gray.try_reserve_exact(pixel_count)
            .map_err(|_| Error::InvalidOperation)?;
        gray.extend(source_pixels.chunks_exact(4).map(|rgba| rgba[0]));
        if gray.len() != pixel_count {
            return Err(Error::InvalidOperation);
        }
        (width_usize, SKColorType::Gray8, SKAlphaType::Opaque, gray)
    } else {
        let mut rgba = Vec::new();
        rgba.try_reserve_exact(source_pixels.len())
            .map_err(|_| Error::InvalidOperation)?;
        rgba.extend_from_slice(source_pixels);
        (
            decoded.row_bytes(),
            SKColorType::Rgba8888,
            if decoded.is_opaque() {
                SKAlphaType::Opaque
            } else {
                SKAlphaType::Unpremul
            },
            rgba,
        )
    };
    let bitmap = SKBitmap::new(width, height, row_bytes, color_type, alpha_type, pixels)?;
    bitmap_to_managed(&bitmap)
 }
 #[cfg(feature = "rust-skia")]
 fn jpeg_is_grayscale(encoded: &[u8]) -> Result<bool, Error> {
    let mut offset = 2;
    while offset + 1 < encoded.len() {
        if encoded[offset] != 0xff {
            offset += 1;
            continue;
        }
        let mut marker_offset = offset + 1;
        while encoded.get(marker_offset) == Some(&0xff) {
            marker_offset += 1;
        }
        let marker = *encoded.get(marker_offset).ok_or(Error::InvalidOperation)?;
        if marker == 0 || marker == 1 || (0xd0..=0xd9).contains(&marker) {
            offset = marker_offset + 1;
            continue;
        }
        let length_bytes = encoded
            .get(marker_offset + 1..marker_offset + 3)
            .ok_or(Error::InvalidOperation)?;
        let length = usize::from(u16::from_be_bytes(
            length_bytes
                .try_into()
                .map_err(|_| Error::InvalidOperation)?,
        ));
        if matches!(
            marker,
            0xc0..=0xc3 | 0xc5..=0xc7 | 0xc9..=0xcb | 0xcd..=0xcf
        ) {
            let components = *encoded
                .get(marker_offset + 8)
                .ok_or(Error::InvalidOperation)?;
            return match components {
                1 => Ok(true),
                3 => Ok(false),
                _ => Err(Error::InvalidOperation),
            };
        }
        if length < 2 {
            return Err(Error::InvalidOperation);
        }
        offset = marker_offset
            .checked_add(1)
            .and_then(|offset| offset.checked_add(length))
            .ok_or(Error::InvalidOperation)?;
    }
    Err(Error::InvalidOperation)
 }
 #[cfg(feature = "rust-skia")]
 fn gif_dimensions(encoded: &[u8]) -> Result<(i32, i32), Error> {
    if encoded.len() < 13 || !(encoded.starts_with(b"GIF87a") || encoded.starts_with(b"GIF89a")) {
        return Err(Error::InvalidOperation);
    }
    let canvas = (
        i32::from(u16::from_le_bytes([encoded[6], encoded[7]])),
        i32::from(u16::from_le_bytes([encoded[8], encoded[9]])),
    );
    validate_dimensions(canvas.0, canvas.1)?;
    let global_table_bytes = if encoded[10] & 0x80 == 0 {
        0
    } else {
        3_usize
            .checked_mul(1_usize << (usize::from(encoded[10] & 0x07) + 1))
            .ok_or(Error::InvalidOperation)?
    };
    let mut offset = 13_usize
        .checked_add(global_table_bytes)
        .filter(|offset| *offset <= encoded.len())
        .ok_or(Error::InvalidOperation)?;
    loop {
        let marker = *encoded.get(offset).ok_or(Error::InvalidOperation)?;
        offset += 1;
        match marker {
            0x2c => {
                let end = offset.checked_add(9).ok_or(Error::InvalidOperation)?;
                let descriptor = encoded.get(offset..end).ok_or(Error::InvalidOperation)?;
                let frame_width = i32::from(u16::from_le_bytes([descriptor[4], descriptor[5]]));
                let frame_height = i32::from(u16::from_le_bytes([descriptor[6], descriptor[7]]));
                validate_dimensions(frame_width, frame_height)?;
                return Ok(canvas);
            }
            0x21 => {
                offset = offset.checked_add(1).ok_or(Error::InvalidOperation)?;
                loop {
                    let length = *encoded.get(offset).ok_or(Error::InvalidOperation)?;
                    offset += 1;
                    if length == 0 {
                        break;
                    }
                    offset = offset
                        .checked_add(usize::from(length))
                        .filter(|offset| *offset <= encoded.len())
                        .ok_or(Error::InvalidOperation)?;
                }
            }
            _ => return Err(Error::InvalidOperation),
        }
    }
 }
 #[cfg(feature = "rust-skia")]
 fn wbmp_dimensions(encoded: &[u8]) -> Result<(i32, i32), Error> {
    if encoded.get(..2) != Some(&[0, 0]) {
        return Err(Error::InvalidOperation);
    }
    let mut offset = 2;
    let width =
        i32::try_from(read_wbmp_integer(encoded, &mut offset)?).map_err(|_| Error::Argument)?;
    let height =
        i32::try_from(read_wbmp_integer(encoded, &mut offset)?).map_err(|_| Error::Argument)?;
    validate_dimensions(width, height)?;
    Ok((width, height))
 }
 #[cfg(feature = "rust-skia")]
 fn read_wbmp_integer(encoded: &[u8], offset: &mut usize) -> Result<u32, Error> {
    let mut value = 0_u32;
    for _ in 0..5 {
        let byte = *encoded.get(*offset).ok_or(Error::InvalidOperation)?;
        *offset += 1;
        value = value
            .checked_shl(7)
            .and_then(|value| value.checked_add(u32::from(byte & 0x7f)))
            .ok_or(Error::InvalidOperation)?;
        if byte & 0x80 == 0 {
            return Ok(value);
        }
    }
    Err(Error::InvalidOperation)
 }
 #[cfg(feature = "rust-skia")]
 fn ico_dimensions(encoded: &[u8]) -> Result<(i32, i32), Error> {
    if encoded.len() < 6 || encoded.get(..4) != Some(&[0, 0, 1, 0]) {
        return Err(Error::InvalidOperation);
    }
    let count = usize::from(u16::from_le_bytes([encoded[4], encoded[5]]));
    let mut best: Option<(u32, usize, usize)> = None;
    for index in 0..count {
        let offset = 6_usize
            .checked_add(index.checked_mul(16).ok_or(Error::InvalidOperation)?)
            .ok_or(Error::InvalidOperation)?;
        let end = offset.checked_add(16).ok_or(Error::InvalidOperation)?;
        let entry = encoded.get(offset..end).ok_or(Error::InvalidOperation)?;
        let width = if entry[0] == 0 {
            256
        } else {
            u32::from(entry[0])
        };
        let height = if entry[1] == 0 {
            256
        } else {
            u32::from(entry[1])
        };
        let area = width.checked_mul(height).ok_or(Error::Argument)?;
        let length = usize::try_from(u32::from_le_bytes(
            entry[8..12]
                .try_into()
                .map_err(|_| Error::InvalidOperation)?,
        ))
        .map_err(|_| Error::Argument)?;
        let image_offset = usize::try_from(u32::from_le_bytes(
            entry[12..16]
                .try_into()
                .map_err(|_| Error::InvalidOperation)?,
        ))
        .map_err(|_| Error::Argument)?;
        if best.is_none_or(|(best_area, _, _)| area > best_area) {
            best = Some((area, image_offset, length));
        }
    }
    let (_, offset, length) = best.ok_or(Error::InvalidOperation)?;
    let end = offset.checked_add(length).ok_or(Error::Argument)?;
    let image = encoded
        .get(offset..end)
        .filter(|image| !image.is_empty())
        .ok_or(Error::InvalidOperation)?;
    if image.starts_with(&[0x89, b'P', b'N', b'G']) {
        return skia_rs_codec::get_image_dimensions(image).map_err(|_| Error::InvalidOperation);
    }
    if image.len() < 40 {
        return Err(Error::InvalidOperation);
    }
    let header_size = u32::from_le_bytes(
        image[0..4]
            .try_into()
            .map_err(|_| Error::InvalidOperation)?,
    );
    if header_size < 40 {
        return Err(Error::InvalidOperation);
    }
    let width = i32::from_le_bytes(
        image[4..8]
            .try_into()
            .map_err(|_| Error::InvalidOperation)?,
    );
    let stored_height = i32::from_le_bytes(
        image[8..12]
            .try_into()
            .map_err(|_| Error::InvalidOperation)?,
    );
    if stored_height <= 0 || stored_height % 2 != 0 {
        return Err(Error::InvalidOperation);
    }
    Ok((width, stored_height / 2))
 }
 #[cfg(feature = "rust-skia")]
 fn validate_dimensions(width: i32, height: i32) -> Result<(), Error> {
    let width = usize::try_from(width).map_err(|_| Error::Argument)?;
    let height = usize::try_from(height).map_err(|_| Error::Argument)?;
    width
        .checked_mul(height)
        .filter(|pixels| *pixels > 0 && *pixels <= DEFAULT_MAX_PIXELS)
        .map(|_| ())
        .ok_or(Error::Argument)
 }
 #[cfg(feature = "rust-skia")]
 fn decode_webp_with_rust(encoded: &[u8]) -> Result<ManagedImage, Error> {
    use std::io::{BufReader, Cursor};
    let reader = BufReader::new(Cursor::new(encoded));
    let mut decoder = image_webp::WebPDecoder::new(reader).map_err(|_| Error::InvalidOperation)?;
    let (width, height) = decoder.dimensions();
    let animated = decoder.is_animated();
    let width_i32 = i32::try_from(width).map_err(|_| Error::Argument)?;
    let height_i32 = i32::try_from(height).map_err(|_| Error::Argument)?;
    validate_dimensions(width_i32, height_i32)?;
    decoder.set_memory_limit(DEFAULT_MAX_PIXELS * 16);
    let output_size = decoder.output_buffer_size().ok_or(Error::Argument)?;
    if output_size > DEFAULT_MAX_PIXELS * 4 {
        return Err(Error::Argument);
    }
    let mut packed_pixels = Vec::new();
    packed_pixels
        .try_reserve_exact(output_size)
        .map_err(|_| Error::InvalidOperation)?;
    packed_pixels.resize(output_size, 0);
    decoder
        .read_image(&mut packed_pixels)
        .map_err(|_| Error::InvalidOperation)?;
    let has_alpha = decoder.has_alpha();
    // image-webp 0.2 uses a divide-by-256 blend fast path for animated
    // canvases. Its fully opaque nonzero samples are consequently one below
    // Skia/libwebp's divide-by-255 result. Correct that bounded first-frame
    // canvas here; partially transparent samples already use the same rounding
    // as the compatibility backend.
    if animated {
        if has_alpha {
            for rgba in packed_pixels.chunks_exact_mut(4) {
                if rgba[3] == u8::MAX {
                    for channel in &mut rgba[..3] {
                        if *channel != 0 {
                            *channel = channel.saturating_add(1);
                        }
                    }
                }
            }
        } else {
            for channel in &mut packed_pixels {
                if *channel != 0 {
                    *channel = channel.saturating_add(1);
                }
            }
        }
    }
    let pixels = if has_alpha {
        packed_pixels
    } else {
        let pixel_count = usize::try_from(width)
            .ok()
            .and_then(|width| {
                usize::try_from(height)
                    .ok()
                    .and_then(|height| width.checked_mul(height))
            })
            .ok_or(Error::Argument)?;
        let rgba_size = pixel_count.checked_mul(4).ok_or(Error::Argument)?;
        let mut rgba = Vec::new();
        rgba.try_reserve_exact(rgba_size)
            .map_err(|_| Error::InvalidOperation)?;
        for rgb in packed_pixels.chunks_exact(3) {
            rgba.extend_from_slice(&[rgb[0], rgb[1], rgb[2], u8::MAX]);
        }
        if rgba.len() != rgba_size {
            return Err(Error::InvalidOperation);
        }
        rgba
    };
    let row_bytes = usize::try_from(width)
        .map_err(|_| Error::Argument)?
        .checked_mul(4)
        .ok_or(Error::Argument)?;
    let bitmap = SKBitmap::new(
        width_i32,
        height_i32,
        row_bytes,
        SKColorType::Rgba8888,
        if has_alpha {
            SKAlphaType::Unpremul
        } else {
            SKAlphaType::Opaque
        },
        pixels,
    )?;
    bitmap_to_managed(&bitmap)
 }
 #[cfg(feature = "skia")]
 fn decode_with_skia(encoded: &[u8]) -> Result<ManagedImage, Error> {
    use skia_safe::Data;
@@ -528,6 +972,394 @@ mod tests {
            SkiaTextureCodec.decode(Box::new(std::io::Cursor::new(Vec::new()))),
            Err(Error::InvalidOperation)
        );
        #[cfg(not(feature = "rust-skia"))]
        assert_eq!(
            RustSkiaTextureCodec.decode(Box::new(std::io::Cursor::new(Vec::new()))),
            Err(Error::InvalidOperation)
        );
    }
    #[cfg(any(feature = "rust-skia", feature = "skia"))]
    fn hex_fixture(source: &str) -> Vec<u8> {
        let digits: Vec<_> = source.bytes().filter(u8::is_ascii_hexdigit).collect();
        assert_eq!(digits.len() % 2, 0, "fixture contains a partial byte");
        digits
            .chunks_exact(2)
            .map(|pair| {
                let high = (pair[0] as char).to_digit(16).expect("hex digit");
                let low = (pair[1] as char).to_digit(16).expect("hex digit");
                u8::try_from(high * 16 + low).expect("hex byte")
            })
            .collect()
    }
    #[cfg(feature = "rust-skia")]
    fn rust_decode(encoded: Vec<u8>) -> Result<ManagedImage, Error> {
        RustSkiaTextureCodec.decode(Box::new(std::io::Cursor::new(encoded)))
    }
    #[cfg(any(feature = "rust-skia", feature = "skia"))]
    fn checked_format_matrix() -> [(&'static str, &'static str, (i32, i32)); 19] {
        [
            (
                "BMP 16-bit RGB555",
                include_str!("../tests/fixtures/rgb555.bmp.hex"),
                (2, 1),
            ),
            (
                "BMP 24-bit bottom-up",
                include_str!("../tests/fixtures/bottom-up.bmp.hex"),
                (8, 8),
            ),
            (
                "BMP 32-bit BGRX",
                include_str!("../tests/fixtures/bgrx32.bmp.hex"),
                (2, 1),
            ),
            (
                "GIF palette and frame offset",
                include_str!("../tests/fixtures/palette-offset.gif.hex"),
                (4, 2),
            ),
            (
                "ICO largest entry",
                include_str!("../tests/fixtures/multi.ico.hex"),
                (2, 2),
            ),
            (
                "JPEG baseline RGB",
                include_str!("../tests/fixtures/baseline.jpg.hex"),
                (8, 8),
            ),
            (
                "JPEG progressive grayscale",
                include_str!("../tests/fixtures/progressive.jpg.hex"),
                (128, 128),
            ),
            (
                "PNG grayscale",
                include_str!("../tests/fixtures/gray.png.hex"),
                (32, 32),
            ),
            (
                "PNG grayscale alpha",
                include_str!("../tests/fixtures/gray-alpha.png.hex"),
                (32, 32),
            ),
            (
                "PNG RGB",
                include_str!("../tests/fixtures/rgb.png.hex"),
                (32, 32),
            ),
            (
                "PNG RGBA",
                include_str!("../tests/fixtures/rgba.png.hex"),
                (32, 32),
            ),
            (
                "PNG straight alpha",
                include_str!("../tests/fixtures/straight-alpha.png.hex"),
                (1, 1),
            ),
            (
                "PNG interlaced palette",
                include_str!("../tests/fixtures/interlaced-palette.png.hex"),
                (32, 32),
            ),
            (
                "WBMP multibyte width",
                include_str!("../tests/fixtures/multibyte.wbmp.hex"),
                (130, 1),
            ),
            (
                "WBMP minimum-length image",
                include_str!("../tests/fixtures/small.wbmp.hex"),
                (2, 2),
            ),
            (
                "WebP lossless RGB",
                include_str!("../tests/fixtures/rgb-lossless.webp.hex"),
                (2, 2),
            ),
            (
                "WebP lossless alpha",
                include_str!("../tests/fixtures/alpha.webp.hex"),
                (1, 1),
            ),
            (
                "WebP lossy",
                include_str!("../tests/fixtures/lossy-red.webp.hex"),
                (8, 8),
            ),
            (
                "WebP animated first frame",
                include_str!("../tests/fixtures/animated.webp.hex"),
                (11, 29),
            ),
        ]
    }
    #[cfg(any(feature = "rust-skia", feature = "skia"))]
    fn assert_checked_format_matrix(codec: &dyn libremetaverse_imaging::ITextureCodec) {
        for (name, fixture, dimensions) in checked_format_matrix() {
            let image = codec
                .decode(Box::new(std::io::Cursor::new(hex_fixture(fixture))))
                .unwrap_or_else(|error| panic!("{name} failed to decode: {error:?}"));
            assert_eq!((image.width, image.height), dimensions, "{name}");
            assert_eq!(
                image.channels,
                if matches!(
                    name,
                    "JPEG progressive grayscale"
                        | "PNG grayscale"
                        | "WBMP multibyte width"
                        | "WBMP minimum-length image"
                ) {
                    ManagedImageImageChannels::GRAY
                } else {
                    ManagedImageImageChannels::COLOR | ManagedImageImageChannels::ALPHA
                },
                "{name}"
            );
        }
    }
    #[cfg(feature = "rust-skia")]
    #[test]
    fn rust_feature_decodes_the_checked_format_matrix() {
        assert_checked_format_matrix(&RustSkiaTextureCodec);
    }
    #[cfg(feature = "skia")]
    #[test]
    fn native_feature_decodes_the_checked_format_matrix() {
        assert_checked_format_matrix(&SkiaTextureCodec);
    }
    #[cfg(all(feature = "rust-skia", feature = "skia"))]
    #[test]
    fn native_and_rust_backends_match_the_shared_contract_matrix() {
        fn assert_plane(name: &str, plane: &str, native: &[u8], rust: &[u8], tolerance: u8) {
            assert_eq!(native.len(), rust.len(), "{name} {plane} length");
            for (index, (&native, &rust)) in native.iter().zip(rust).enumerate() {
                assert!(
                    native.abs_diff(rust) <= tolerance,
                    "{name} {plane}[{index}]: native={native}, rust={rust}, tolerance={tolerance}"
                );
            }
        }
        for (name, fixture, _) in checked_format_matrix() {
            let bytes = hex_fixture(fixture);
            let native = SkiaTextureCodec
                .decode(Box::new(std::io::Cursor::new(bytes.clone())))
                .unwrap_or_else(|error| panic!("native {name}: {error:?}"));
            let rust = RustSkiaTextureCodec
                .decode(Box::new(std::io::Cursor::new(bytes)))
                .unwrap_or_else(|error| panic!("Rust {name}: {error:?}"));
            assert_eq!(native.width, rust.width, "{name} width");
            assert_eq!(native.height, rust.height, "{name} height");
            assert_eq!(native.channels, rust.channels, "{name} channels");
            let tolerance = if name.starts_with("JPEG") {
                8
            } else if name == "WebP lossy" {
                10
            } else {
                0
            };
            assert_plane(name, "red", &native.red, &rust.red, tolerance);
            assert_plane(name, "green", &native.green, &rust.green, tolerance);
            assert_plane(name, "blue", &native.blue, &rust.blue, tolerance);
            assert_plane(name, "alpha", &native.alpha, &rust.alpha, tolerance);
        }
    }
    #[cfg(feature = "rust-skia")]
    #[test]
    fn rust_feature_preserves_canvas_orientation_selection_and_alpha() {
        for fixture in [
            include_str!("../tests/fixtures/two-by-two-bottom-up.bmp.hex"),
            include_str!("../tests/fixtures/two-by-two-top-down.bmp.hex"),
        ] {
            let bitmap = rust_decode(hex_fixture(fixture)).expect("oriented BMP");
            assert_eq!(bitmap.red, [255, 0, 0, 255]);
            assert_eq!(bitmap.green, [0, 255, 0, 255]);
            assert_eq!(bitmap.blue, [0, 0, 255, 255]);
        }
        let gif = rust_decode(hex_fixture(include_str!(
            "../tests/fixtures/palette-offset.gif.hex"
        )))
        .expect("GIF logical canvas");
        assert_eq!((gif.width, gif.height), (4, 2));
        let icon = rust_decode(hex_fixture(include_str!("../tests/fixtures/multi.ico.hex")))
            .expect("largest ICO entry");
        assert_eq!(icon.red, [255, 0, 0, 255]);
        assert_eq!(icon.green, [0, 255, 0, 255]);
        assert_eq!(icon.blue, [0, 0, 255, 255]);
        let alpha = rust_decode(hex_fixture(include_str!(
            "../tests/fixtures/alpha.webp.hex"
        )))
        .expect("alpha WebP");
        assert_eq!(
            (alpha.red[0], alpha.green[0], alpha.blue[0]),
            (255, 255, 255)
        );
        assert!((127..=128).contains(&alpha.alpha[0]));
        let lossy = rust_decode(hex_fixture(include_str!(
            "../tests/fixtures/lossy-red.webp.hex"
        )))
        .expect("lossy WebP");
        assert!(lossy.red.iter().all(|red| *red >= 245));
        assert!(lossy.green.iter().all(|green| *green <= 10));
        assert!(lossy.blue.iter().all(|blue| *blue <= 10));
        assert!(lossy.alpha.iter().all(|alpha| *alpha == u8::MAX));
    }
    #[cfg(feature = "rust-skia")]
    #[test]
    fn rust_feature_rejects_invalid_truncated_and_oversized_input_without_panicking() {
        for malformed in [Vec::new(), b"not an image".to_vec(), b"GIF89a".to_vec()] {
            let result =
                std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| rust_decode(malformed)));
            assert!(result.is_ok(), "malformed input panicked");
            assert_eq!(result.expect("checked above"), Err(Error::InvalidOperation));
        }
        let mut pixel_bomb =
            hex_fixture(include_str!("../tests/fixtures/interlaced-palette.png.hex"));
        pixel_bomb[16..20].copy_from_slice(&4097_u32.to_be_bytes());
        pixel_bomb[20..24].copy_from_slice(&4097_u32.to_be_bytes());
        assert_eq!(rust_decode(pixel_bomb), Err(Error::Argument));
        let mut gif_frame_bomb =
            hex_fixture(include_str!("../tests/fixtures/palette-offset.gif.hex"));
        let descriptor = gif_frame_bomb[109..]
            .iter()
            .position(|byte| *byte == 0x2c)
            .map(|offset| offset + 109)
            .expect("first GIF image descriptor");
        gif_frame_bomb[descriptor + 5..descriptor + 7].copy_from_slice(&u16::MAX.to_le_bytes());
        gif_frame_bomb[descriptor + 7..descriptor + 9].copy_from_slice(&u16::MAX.to_le_bytes());
        assert_eq!(rust_decode(gif_frame_bomb), Err(Error::Argument));
        let mut malformed_gif_palette =
            hex_fixture(include_str!("../tests/fixtures/palette-offset.gif.hex"));
        // Advertise a 256-entry global palette while retaining the fixture's
        // much smaller checked table. Preflight must reject the missing table
        // before the decoder can allocate or index palette storage.
        malformed_gif_palette[10] = (malformed_gif_palette[10] & 0xf8) | 0x07;
        assert_eq!(
            rust_decode(malformed_gif_palette),
            Err(Error::InvalidOperation)
        );
        let mut icon_embedded_bomb = hex_fixture(include_str!("../tests/fixtures/multi.ico.hex"));
        icon_embedded_bomb[86..90].copy_from_slice(&4097_i32.to_le_bytes());
        icon_embedded_bomb[90..94].copy_from_slice(&8194_i32.to_le_bytes());
        assert_eq!(rust_decode(icon_embedded_bomb), Err(Error::Argument));
        let over_limit = vec![0_u8; DEFAULT_MAX_ENCODED_BYTES + 1];
        assert_eq!(rust_decode(over_limit), Err(Error::Argument));
        for fixture in [
            include_str!("../tests/fixtures/bottom-up.bmp.hex"),
            include_str!("../tests/fixtures/palette-offset.gif.hex"),
            include_str!("../tests/fixtures/multi.ico.hex"),
            include_str!("../tests/fixtures/interlaced-palette.png.hex"),
            include_str!("../tests/fixtures/alpha.webp.hex"),
        ] {
            let mut bytes = hex_fixture(fixture);
            bytes.truncate(bytes.len() / 2);
            let result =
                std::panic::catch_unwind(std::panic::AssertUnwindSafe(|| rust_decode(bytes)));
            assert!(result.is_ok(), "truncated input panicked");
            assert!(result.expect("checked above").is_err());
        }
    }
    #[cfg(feature = "rust-skia")]
    struct DropStream {
        cursor: std::io::Cursor<Vec<u8>>,
        drops: std::sync::Arc<std::sync::atomic::AtomicUsize>,
    }
    #[cfg(feature = "rust-skia")]
    impl std::io::Read for DropStream {
        fn read(&mut self, buffer: &mut [u8]) -> std::io::Result<usize> {
            std::io::Read::read(&mut self.cursor, buffer)
        }
    }
    #[cfg(feature = "rust-skia")]
    impl std::io::Write for DropStream {
        fn write(&mut self, buffer: &[u8]) -> std::io::Result<usize> {
            std::io::Write::write(&mut self.cursor, buffer)
        }
        fn flush(&mut self) -> std::io::Result<()> {
            Ok(())
        }
    }
    #[cfg(feature = "rust-skia")]
    impl std::io::Seek for DropStream {
        fn seek(&mut self, position: std::io::SeekFrom) -> std::io::Result<u64> {
            std::io::Seek::seek(&mut self.cursor, position)
        }
    }
    #[cfg(feature = "rust-skia")]
    impl Drop for DropStream {
        fn drop(&mut self) {
            self.drops.fetch_add(1, std::sync::atomic::Ordering::SeqCst);
        }
    }
    #[cfg(feature = "rust-skia")]
    #[test]
    fn rust_feature_is_thread_safe_across_repeated_decode_and_drop() {
        use std::sync::Arc;
        use std::sync::atomic::{AtomicUsize, Ordering};
        fn assert_texture_codec<T: libremetaverse_imaging::ITextureCodec + Send + Sync>() {}
        assert_texture_codec::<RustSkiaTextureCodec>();
        let codec = Arc::new(RustSkiaTextureCodec);
        let png = Arc::new(hex_fixture(include_str!(
            "../tests/fixtures/interlaced-palette.png.hex"
        )));
        let mut workers = Vec::new();
        for _ in 0..8 {
            let codec = Arc::clone(&codec);
            let png = Arc::clone(&png);
            workers.push(std::thread::spawn(move || {
                for _ in 0..16 {
                    let image = codec
                        .decode(Box::new(std::io::Cursor::new((*png).clone())))
                        .expect("concurrent PNG decode");
                    assert_eq!((image.width, image.height), (32, 32));
                    let repeated = codec
                        .decode(Box::new(std::io::Cursor::new((*png).clone())))
                        .expect("repeated concurrent PNG decode");
                    assert_eq!(image, repeated);
                }
            }));
        }
        for worker in workers {
            worker.join().expect("decoder worker did not panic");
        }
        let drops = Arc::new(AtomicUsize::new(0));
        let stream = DropStream {
            cursor: std::io::Cursor::new((*png).clone()),
            drops: Arc::clone(&drops),
        };
        codec.decode(Box::new(stream)).expect("drop-probe decode");
        assert_eq!(drops.load(Ordering::SeqCst), 1);
    }
    #[cfg(feature = "skia")]
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/README.md
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/README.md
@@ -0,0 +1,29 @@
 # Rust codec fixtures
 The tests decode these hexadecimal files into their exact checked-in bytes; no
 image is generated while tests run. Unless noted below, fixtures come from the
 BSD-3-Clause Skia test resources vendored by `skia-bindings 0.99.0`.
 | Fixture | SHA-256 |
 | --- | --- |
 | `alpha.webp` | `8b09993d8ffc9a9ec4e7f5f26a1c126cf265c37b0d63c0c5be2506e20dbc6fea` |
 | `animated.webp` | `292753f066add623af1e30bbeeca58f15b3d6d1052e12b13e30f21f8d3c14505` |
 | `baseline.jpg` | `4e45048dbe3078943eb364221a9757df9b9845b80e795ccdc944f1c18b5e221b` |
 | `bottom-up.bmp` | `d9cc5fff9e8e351727ad4519236ae46eaf37f8007dad5cdb8619fcd67ec68903` |
 | `gray-alpha.png` | `377a67510b4ccc74cdcce14847b02035e75ccab36e9d8e00586c4c24d1ae385a` |
 | `gray.png` | `85b19fcda452d6cbf02f570c353cfa9e47c29237f2fc8f0114deb6cd0b23f97a` |
 | `interlaced-palette.png` | `6283a61b1f7344c0cfa741076d6aed4a16a6bc5582e81db8dd7374a34230b0df` |
 | `palette-offset.gif` | `32d3409a79b75614ef385354d54f148f08856f8e9ce0d55054582ff7f40f4461` |
 | `progressive.jpg` | `d07a9815dc792543c16b796ec7729c19d6a29e7d9b4d0bbab50f4ef210be7767` |
 | `rgb.png` | `ecea1ef4a001a999ce9b82d18abf47401eb92998708b306b6c9a8ac3a6a9a2c8` |
 | `rgba.png` | `756a03364c02e3c9f85d6f4029eb3cef2488c081dc537d46e102bebcb9e02732` |
 | `straight-alpha.png` | `5a647404fa5289da777b1bb9e1dcfe20027262f992a214f38efaecc3da0e08a4` |
 `lossy-red.webp` was produced once with FFmpeg 5.1.8/libwebp from a solid
 8x8 red source (`-c:v libwebp -lossless 0 -quality 80`) and has SHA-256
 `7e3aaf1a442b6e69f7706ee5afe0aeacb2d096e384dbb63e792421fe2449cfe8`.
 The remaining tiny BMP, ICO, WBMP, and lossless RGB WebP files are original
 MetaCrate byte-level fixtures. Their reviewed bytes are intentionally readable
 in the `.hex` files and exercise header fields, row layout, masks, multi-byte
 integers, and multi-entry selection directly.
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/alpha.webp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/alpha.webp.hex
@@ -0,0 +1,3 @@
 524946461e000000574542505650384c110000002f0000001007d0fffef7
 bf7f8188e87f0000
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/animated.webp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/animated.webp.hex
@@ -0,0 +1,12 @@
 524946464c01000057454250565038580a000000120000000a00001c0000
 414e494d060000000000ffff0000414e4d465a0000000000000000000a00
 001c0000e80300005650384c420000002f0a0007001720164ce6ff849cc6
 388ee3fc078e0645b1ad54573b50821444f0db8728aec9f9562688e8bf80
 a0c8013bd09c2c5e759505ce8f25232ee33615170c0d414e4d465a000000
 010000050000060000100000f40100005650384c420000002f0600040017
 201048525e647e814092f222330b049298079979fe037f15288a6ca749a3
 de31819aee2fc70c32898988fe4f008092d5d79d5525f8079e709b3b6120
 414e4d465c0000000100000100000600000f0000e80300005650384c4400
 00002f06c0030017201048621e647e814092f222330b049298079979fe03
 7f15286a1bc9b9defe4362d05ce5b7cfd5c23c1411fd4f093a8c46a30e09
 ee4f7ff3c3c3c3cdd303
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/baseline.jpg.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/baseline.jpg.hex
@@ -0,0 +1,11 @@
 ffd8ffe000104a46494600010101004800480000ffdb004300100b0c0e0c
 0a100e0d0e1211101318281a181616183123251d283a333d3c3933383740
 485c4e404457453738506d51575f626768673e4d71797064785c656763ff
 db0043011112121815182f1a1a2f63423842636363636363636363636363
 636363636363636363636363636363636363636363636363636363636363
 6363636363636363ffc00011080008000803012200021101031101ffc400
 1500010100000000000000000000000000000003ffc4001e100002010403
 01000000000000000000000102000311213112224171ffc4001501010100
 000000000000000000000000000304ffc4001a1101000203010000000000
 00000000000001000203213141ffda000c03010002110311003f009d4e6a
 8c15b354b2d455eda6b922c32367dd7db2222d6c9a2558c7c5393fffd9
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/bgrx32.bmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/bgrx32.bmp.hex
@@ -0,0 +1,2 @@
 424d3e000000000000003600000028000000020000000100000001002000000000000800000000000000000000000000000000000000
 0000ff0000ff0000
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/bottom-up.bmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/bottom-up.bmp.hex
@@ -0,0 +1,10 @@
 424df6000000000000003600000028000000080000000800000001001800
 00000000c0000000130b0000130b000000000000000000002272b0f8232e
 d989f03857b32260a8fe403371fe95df716a63fea76b954ce022bce472b2
 4a9f121345e342373d0a19bd98ac6f271d9411e45f83b2fb996ed8629116
 8c1271b4ca39f93d27831ab4c312f867abcc184203a7b97d481082b44afe
 5221c5d6cc78abb4dc7dd209f300ca475d60b26f44466e5742f73ba8028f
 df09557e02c78aaa24966c888154628936400ea6bdb61dc088d62bd46293
 b241c6decea5ba6e60f34b8f70a5bb5d5f39395ce266761927ba3cb0fcde
 7438c19300fa
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/gray-alpha.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/gray-alpha.png.hex
@@ -0,0 +1,5 @@
 89504e470d0a1a0a0000000d4948445200000020000000200804000000d9
 73b27f0000000467414d41000186a031e8965f0000003549444154488963
 fccfc0c001859c683431229c2cdf1928032c3f86be01a361301a06543160
 341047c3802a068c06e2681850c30000df2a207da0bf7158000000004945
 4e44ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/gray.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/gray.png.hex
@@ -0,0 +1,5 @@
 89504e470d0a1a0a0000000d494844520000002000000020080000000056
 1125280000000467414d41000186a031e8965f0000004149444154388d63
 646024001408c8b30c05058c0f0829f8f71f3f6079301c1430ca11906764
 a2795c0c06058c8ff0cafeffcff887e67131181430cae0956564040050e5
 fe7171a90b240000000049454e44ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/interlaced-palette.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/interlaced-palette.png.hex
@@ -0,0 +1,5 @@
 89504e470d0a1a0a0000000d49484452000000200000002001030000013e
 b3d82100000006504c5445eeff222266ff6c1ad226000000294944415408
 d7636080820f50b80a0a43d1b0b131c39933d849088348363f1040880f40
 00212810030009ba422d1cbe5f9a0000000049454e44ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/lossy-red.webp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/lossy-red.webp.hex
@@ -0,0 +1,4 @@
 524946463c000000574542505650382030000000d001009d012a08000800
 01402625a00274ba01f80003b000fef36997fe6c0ae6b9f7fbffe9707e97
 07e9707fe9480000
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/multi.ico.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/multi.ico.hex
@@ -0,0 +1,8 @@
 000001000200
 01010000010020002c00000026000000
 02020000010020003800000052000000
 28000000010000000200000001002000000000000400000000000000000000000000000000000000
 0000ffff
 28000000020000000400000001002000000000001000000000000000000000000000000000000000
 ff0000ffffffffff0000ffff00ff00ff
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/multibyte.wbmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/multibyte.wbmp.hex
@@ -0,0 +1,3 @@
 0000810201
 ffffffffffffffffffffffffffffffff80
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/palette-offset.gif.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/palette-offset.gif.hex
@@ -0,0 +1,7 @@
 474946383961040002008400000000001000002000003000004000005000
 00600000700000800000900000a00000b00000c00000d00000e00000f000
 000000000000110000220000330000440000550000660000770000880000
 990000aa0000bb0000cc0000dd0000ee0000ff21f904000a0000002c0000
 00000400020000070908090a0b0c0d0e0f810021f9040114001a002c0100
 0100030001000007041f1a1581003b
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/progressive.jpg.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/progressive.jpg.hex
@@ -0,0 +1,26 @@
 ffd8ffe000104a46494600010101004800480000ffdb0043000806060706
 05080707070909080a0c140d0c0b0b0c1912130f141d1a1f1e1d1a1c1c20
 242e2720222c231c1c2837292c30313434341f27393d38323c2e333432ff
 c2000b080080008001011100ffc400150001010000000000000000000000
 0000000306ffda0008010100000001824444444444444448744444444444
 444487444444444444444874444444444444448744444444444444487444
 444444444444874444444444444448744444444444444487444444444444
 444874444444444444448744444444444444487444444444444444874444
 444444444448744444444444444487444444444444444874444444444444
 44ffc40014100100000000000000000000000000000080ffda0008010100
 010502007fffc40014100100000000000000000000000000000080ffda00
 08010100063f02007fffc400151001010000000000000000000000000000
 0100ffda0008010100013f21082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082082082082082
 082082082082082082082082082082082082082082082082ffda00080101
 000000100000000000000000000000000000000000000000000000000000
 000000000000ffc40014100100000000000000000000000000000080ffda
 0008010100013f10007fff00ff00ff00ff00ff00ff00ff00ff00ff00ff00
 ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00
 ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00
 ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00ff00
 ff00ff00ff00ff00ff00ff00ff00ff00ff00ffd9
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/rgb-lossless.webp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/rgb-lossless.webp.hex
@@ -0,0 +1,2 @@
 524946461c000000574542505650384c0f0000002f014000000710f58ffe
 0722a2ff0100
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/rgb.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/rgb.png.hex
@@ -0,0 +1,5 @@
 89504e470d0a1a0a0000000d4948445200000020000000200802000000fc
 18eda30000000467414d41000186a031e8965f00000048494441544889ed
 d5c10900300c024085ec91fdb772133b442bf4a1f8cee12bb40d043b800a
 14f81ca0ede47d4c784081020f4a871fc284071428f0a0743823a94081bb
 7077a3c00182b1f95e3ed793980000000049454e44ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/rgb555.bmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/rgb555.bmp.hex
@@ -0,0 +1,2 @@
 424d3a000000000000003600000028000000020000000100000001001000000000000400000000000000000000000000000000000000
 007ce003
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/rgba.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/rgba.png.hex
@@ -0,0 +1,7 @@
 89504e470d0a1a0a0000000d494844520000002000000020080600000073
 7a7af40000000467414d41000186a031e8965f0000006f494441545885ed
 d6310a80300c46e12764684fa1f73f55048f21c4ddc545781d52e85028fc
 1f4d28d98a01305e7b7e9cffba33831d75054703ca06a8f90d58a0074e35
 1e227d805c8254e31bb0420f5cdc2e0079208892ffe2a00136a07b400794
 3c1004d900195036407f011bf00052201a9cd68fe9670000000049454e44
 ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/small.wbmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/small.wbmp.hex
@@ -0,0 +1 @@
 000002028040
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/straight-alpha.png.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/straight-alpha.png.hex
@@ -0,0 +1,6 @@
 89504e470d0a1a0a0000000d49484452000000010000000108060000001f
 15c489000000017352474200aece1ce900000006624b474400ff00ff00ff
 a0bda793000000097048597300000b1300000b1301009a9c180000000774
 494d4507de040313163ac721af9d0000001974455874436f6d6d656e7400
 4372656174656420776974682047494d5057810e170000000d4944415408
 d763f8ffff7f3d00097b037d178855c50000000049454e44ae426082
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-bottom-up.bmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-bottom-up.bmp.hex
@@ -0,0 +1,3 @@
 424d46000000000000003600000028000000020000000200000001001800000000001000000000000000000000000000000000000000
 ff0000ffffff00000000ff00ff000000
--- a/crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-top-down.bmp.hex
+++ b/crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-top-down.bmp.hex
@@ -0,0 +1,3 @@
 424d4600000000000000360000002800000002000000feffffff01001800000000001000000000000000000000000000000000000000
 0000ff00ff000000ff0000ffffff0000
--- a/crates/libremetaverse-types/Cargo.toml
+++ b/crates/libremetaverse-types/Cargo.toml
@@ -18,6 +18,12 @@ sha1 = "0.10"
 sha2 = "0.11"
 uuid = { version = "1.18", features = ["v4"] }
 # Browser and JavaScript WASM targets have no operating-system entropy syscall.
 # Select getrandom's supported Web Crypto adapter only for that target family.
 [target.'cfg(target_family = "wasm")'.dependencies]
 getrandom = { version = "0.4", features = ["wasm_js"] }
 uuid = { version = "1.18", features = ["v4", "rng-getrandom"] }
 [dev-dependencies]
 stats_alloc = "0.1.10"
--- a/crates/libremetaverse/README.md
+++ b/crates/libremetaverse/README.md
@@ -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 |
--- a/deny.toml
+++ b/deny.toml
@@ -39,6 +39,8 @@ allow = []
 allow-workspace = true
 deny = []
 skip = [
    { crate = "bit-vec@0.8.0", reason = "Approved pinned skia-rs shader parser compatibility line" },
    { crate = "bitflags@1.3.2", reason = "Approved pinned pure-Rust PNG compatibility line" },
    { crate = "block-buffer@0.10.4", reason = "Approved RustCrypto digest 0.10 compatibility line" },
    { crate = "cfg_aliases@0.1.1", reason = "Approved older nix build-helper line" },
    { crate = "const-oid@0.9.6", reason = "Approved DTLS certificate compatibility line" },
@@ -47,10 +49,12 @@ skip = [
    { crate = "digest@0.10.7", reason = "Approved legacy hash and WebRTC compatibility line" },
    { crate = "getrandom@0.2.17", reason = "Approved elliptic-curve entropy compatibility line" },
    { crate = "getrandom@0.3.4", reason = "Approved rand 0.9 entropy compatibility line" },
    { crate = "hashbrown@0.16.1", reason = "Approved pinned skia-rs geometry compatibility line" },
    { crate = "nix@0.28.0", reason = "Approved machine-address Unix compatibility line" },
    { crate = "nom@7.1.3", reason = "Approved Skia bindgen parser compatibility line" },
    { crate = "rand_core@0.6.4", reason = "Approved elliptic-curve random compatibility line" },
    { crate = "rand_core@0.9.5", reason = "Approved rand 0.9 compatibility line" },
    { crate = "rustc-hash@1.1.0", reason = "Approved pinned skia-rs shader parser compatibility line" },
    { crate = "sha2@0.10.9", reason = "Approved WebRTC RustCrypto compatibility line" },
    { crate = "shlex@1.3.0", reason = "Approved Skia bindgen shell parser compatibility line" },
    { crate = "syn@2.0.119", reason = "Approved MetaCrate code generator syntax line" },
--- a/docs/imaging-meshing.md
+++ b/docs/imaging-meshing.md
@@ -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
+target-specific dependency. The consolidated required Gitea gate exercises the
-consolidated required Gitea gate exercises both optional features on
+native feature, while a dedicated `ubuntu-latest` job tests `rust-skia`, audits
-`ubuntu-latest` while its minimal-feature check proves that no native codec is
+its normal/build graph without installing native codec tools, and compiles the
-needed for the owned Rust and translated compatibility tests.
+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
--- a/docs/release-candidate.md
+++ b/docs/release-candidate.md
@@ -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 |
--- a/docs/rust-api-guide.md
+++ b/docs/rust-api-guide.md
@@ -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 |
--- a/release/DEPENDENCY-LICENSES.json
+++ b/release/DEPENDENCY-LICENSES.json
--- a/release/DISTRIBUTION-MANIFEST.json
+++ b/release/DISTRIBUTION-MANIFEST.json
@@ -1,6 +1,6 @@
 {
  "schema": 1,
-  "cargo_lock_sha256": "68988caa2c014bf2c67563df3dd0a8348d67eeb06559649798463fd8211fc0cb",
+  "cargo_lock_sha256": "a547e07459a810d61571eca6775cebea871fd2874508a494350918fddccf8d6d",
  "provenance_policy_sha256": "f95475a2284ab282e9432865d4a7ed103498a56ed5ec2393017bc312c77da890",
  "upstream_repository": "https://github.com/cinderblocks/libremetaverse",
  "upstream_commit": "2aa70bb68513b39795da5d13c88f31b86e85a3ba",
@@ -17,8 +17,8 @@
    },
    {
      "path": ".gitea/workflows/ci.yml",
-      "bytes": 6440,
+      "bytes": 7567,
-      "sha256": "6241a445155b0691896af98310b18858e0c38537dca70c80c5c0bd9cf8f1c0ca"
+      "sha256": "ae8f50aaf0ab6bd07cfff49d75ba7cd1f051bbd6c7599dc8f1d5f239db5b8561"
    },
    {
      "path": ".gitea/workflows/release.yml",
@@ -42,8 +42,8 @@
    },
    {
      "path": "Cargo.lock",
-      "bytes": 103842,
+      "bytes": 117042,
-      "sha256": "68988caa2c014bf2c67563df3dd0a8348d67eeb06559649798463fd8211fc0cb"
+      "sha256": "a547e07459a810d61571eca6775cebea871fd2874508a494350918fddccf8d6d"
    },
    {
      "path": "Cargo.toml",
@@ -62,13 +62,13 @@
    },
    {
      "path": "README.md",
-      "bytes": 35953,
+      "bytes": 36207,
-      "sha256": "dea4a52f12e5885e2c53356c56b122c9bbf00382cbff21ff179e05b1d8714f05"
+      "sha256": "c3f0ff673ad886783314122cf49162e59ccfa4d82a928023d930d60bf521c6b3"
    },
    {
      "path": "RUSTREWRITE.md",
-      "bytes": 54472,
+      "bytes": 55217,
-      "sha256": "b3bc471cb82e76cca0c3d251090634de3ed29e24ef91b01d3cc89723e31854be"
+      "sha256": "487dce943fbe823ab5967bbedff506e1229b70508cb73d33fe6726ee11a2fc68"
    },
    {
      "path": "api/API-COVERAGE.md",
@@ -102,13 +102,13 @@
    },
    {
      "path": "api/SEMVER-AUDIT.md",
-      "bytes": 5558,
+      "bytes": 5608,
-      "sha256": "3c44b4b0ea579d975492fd5f9395a29fc597e43b126f8cbae4a0c14792232dd0"
+      "sha256": "91c8dfc22d6f6d411fddc0c52ea02f43245c303eb0fe6d8bac2d46046d7a4ddd"
    },
    {
      "path": "api/SEMVER-BASELINE.json",
-      "bytes": 5901,
+      "bytes": 6087,
-      "sha256": "cd422369af58c6f60dbdda202ae4bb331f68ca3aacb5171839512100c027432e"
+      "sha256": "41d77e564f53f7757c8ce7be56abc310d92edf094a0b9ee516944ad2389c0025"
    },
    {
      "path": "api/SHIM-COVERAGE.md",
@@ -212,8 +212,8 @@
    },
    {
      "path": "ci/ci-coverage.json",
-      "bytes": 5593,
+      "bytes": 5694,
-      "sha256": "241e7bc687b1c2395885e4cd2a95c446e5d4847e3bf9a34d8cee3d76bcbc2903"
+      "sha256": "40eed10def683f978c65deba5d2c09f463330fe1cd6357efafc875d86ed1afa3"
    },
    {
      "path": "ci/concurrency-thresholds.json",
@@ -222,8 +222,8 @@
    },
    {
      "path": "ci/dependency-policy.json",
-      "bytes": 10851,
+      "bytes": 12019,
-      "sha256": "781d497a7a0ddd53fb9158e74e1c5f967eaf3b97535596b42bf34fa38e59b482"
+      "sha256": "5d35e2940c22da4c7a488a4ace7dc55ab7293a8ea713b6d71a62d1d0af2ac9cb"
    },
    {
      "path": "ci/evidence/api-audit.json",
@@ -267,8 +267,8 @@
    },
    {
      "path": "ci/release-matrix.json",
-      "bytes": 8560,
+      "bytes": 9206,
-      "sha256": "f6a641f66c023cd00d5d8b8692b5d6f4a8273fee8e8b5411cab4481de1b0f602"
+      "sha256": "c87d86bd754b0c6d98971e0bae83b89bee33be1068f080b02ce897adbd22414e"
    },
    {
      "path": "codegen/README.md",
@@ -332,13 +332,13 @@
    },
    {
      "path": "crates/libremetaverse-imaging-skia/Cargo.toml",
-      "bytes": 1440,
+      "bytes": 1691,
-      "sha256": "0fb038f36280490487eb3f9e24176abd0f002504918b7bdac83ca319d92298e2"
+      "sha256": "013ba0f82c12f654d3b7d90aea4088eb5af0f888fc810736821b9dc9eef20d44"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/README.md",
-      "bytes": 3196,
+      "bytes": 6542,
-      "sha256": "8e1475598b33502d8b7de9528cf925919232dd57ad5c84cce9a382a9b5a22dc2"
+      "sha256": "9812fa5c5221497a9a3200564aa9d29425ec7f79ff0d2e3e86455c04cb1ff460"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/src/backend.rs",
@@ -352,13 +352,123 @@
    },
    {
      "path": "crates/libremetaverse-imaging-skia/src/lib.rs",
-      "bytes": 811,
+      "bytes": 1182,
-      "sha256": "a180686de4aa47d167e61d1198676dd0fa817490669090b177fc9f662069803d"
+      "sha256": "8a8a49b2802b0012e0f4731c9a40bfa3c12784716ed2ddb17dad07ef8cd7a4f3"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/src/skia_codec.rs",
-      "bytes": 21674,
+      "bytes": 52736,
-      "sha256": "59215a746a0842609ba8a4c86dca0c09c38043a0ea832416159a2d555c612827"
+      "sha256": "373cb9c033dc1d2ea40cee19fc1212860882ac5f679b1952fd5b2ffd72b46809"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/README.md",
      "bytes": 1852,
      "sha256": "d84610151dceba3012549a2b001d49cc4679e0160713dbcafc11f748f7b19edb"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/alpha.webp.hex",
      "bytes": 79,
      "sha256": "f7e268437d69a569a27ee15fb3c1c21785afe27c4ad1f99fe63e362cf85af718"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/animated.webp.hex",
      "bytes": 692,
      "sha256": "90accfdcb7c2548162d641990f9c7dc5276b81164137467b274b9ab65e12ec5c"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/baseline.jpg.hex",
      "bytes": 669,
      "sha256": "c614e00c9ab1247ac4957dde699e62a82f61f1ea25bbd02a8f86dac27fc0f2c8"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/bgrx32.bmp.hex",
      "bytes": 126,
      "sha256": "9cdb2db245a0d4ea5289c36e8ef3c55e8a1d9933b2854760dfc2b3474fbcd299"
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      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/bottom-up.bmp.hex",
      "bytes": 502,
      "sha256": "dc73f5816020b36c312b48d86afe4fac7bbe250ca4255f7a84b654cb610d7bf6"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/gray-alpha.png.hex",
      "bytes": 257,
      "sha256": "ba2bd4b3ec1286aecfd33141474a2855d697ee88888881396e517a9fbfc1781e"
    },
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      "bytes": 281,
      "sha256": "0122a5fb4c9ec3398056b74cf503492df06dea9b174abde61b05853eaf5d781f"
    },
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      "bytes": 237,
      "sha256": "d3e76f043e8da40cce95cfb75ac1d9a34a5dc6633b87258f62c77830c9c3d311"
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      "bytes": 140,
      "sha256": "5a31db73c00a7543b1831a8488c8c393c91042c35d10ee874ab2b91060524491"
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      "bytes": 284,
      "sha256": "75f085b4a18c72fbf2404bd16c5d3c6ffce16e6e8823c7d5dd12f4aa54e4f179"
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      "bytes": 47,
      "sha256": "fd1e97b193d36d1c4d5650b41081487d4ecacbfe0277d29e61a3c6dc9d9ce5e6"
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      "bytes": 337,
      "sha256": "b53f9756afa1a8409ba800fadc51113664210eda9d16afbbf4465a509c230cbd"
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      "bytes": 1566,
      "sha256": "61244f0a07cdb9bf6908c8ec8f896e0a9a6385f65cffc5fb99407c772e3a4a5a"
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      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/rgb-lossless.webp.hex",
      "bytes": 74,
      "sha256": "e8ab53c5c310c356bccaf7f2baa40190ff39add1c68307fa816e769cfb044f61"
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      "bytes": 295,
      "sha256": "1e5ec2ef16d17aa895651ae49a05e173fb631a8addf2400fa0376788f23e8656"
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      "bytes": 118,
      "sha256": "3e3fd2851ae755c990d9a3d0b2b48d47e67e76a812782cc1107feebb9a2bfca5"
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      "bytes": 375,
      "sha256": "2f6af08ab8092a3705a7776727b2791be4a041ceacde64651993f4bb7e96eb04"
    },
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      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/small.wbmp.hex",
      "bytes": 13,
      "sha256": "00625cd5781673ec81928d2c08a73516ba820fb46cfe155779c321335068ecab"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/straight-alpha.png.hex",
      "bytes": 362,
      "sha256": "123f0a325427e2810c0544d3dc24e5943757a4f86f0e2892f10e7a974cc01156"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-bottom-up.bmp.hex",
      "bytes": 143,
      "sha256": "be53e0cd06441f5795b11d1b517d1542459952d0aa464ec5c7f9d443a42111df"
    },
    {
      "path": "crates/libremetaverse-imaging-skia/tests/fixtures/two-by-two-top-down.bmp.hex",
      "bytes": 143,
      "sha256": "83bbf5c1c66e93c7aa413428d760230bca205eb4a1c4f3fc60f9fc63560c285f"
    },
    {
      "path": "crates/libremetaverse-imaging/Cargo.toml",
@@ -702,8 +812,8 @@
    },
    {
      "path": "crates/libremetaverse-types/Cargo.toml",
-      "bytes": 505,
+      "bytes": 837,
-      "sha256": "674f227613ac9776f7ea09fb59a6504850830bd8bfc6e62e96ee691226635ae4"
+      "sha256": "5751090243c10be962db766afa5bcede1074d6d63d3c715528f922bdc440e3e4"
    },
    {
      "path": "crates/libremetaverse-types/benches/geometry.rs",
@@ -892,8 +1002,8 @@
    },
    {
      "path": "crates/libremetaverse/README.md",
-      "bytes": 13059,
+      "bytes": 13123,
-      "sha256": "871b0b94073aafa46235bba7d150c13d4c4900da5e4e2d82201604365d2c5c40"
+      "sha256": "d0fa677f09dcc7e85f1b63e92cce6316e57103583916e166727d1e999173105a"
    },
    {
      "path": "crates/libremetaverse/assets/avatar_lad.xml",
@@ -1522,8 +1632,8 @@
    },
    {
      "path": "deny.toml",
-      "bytes": 2738,
+      "bytes": 3140,
-      "sha256": "2186fbadd60f11b672c47a916b89dcfc350c3ed922595d9ecf48346a0767f364"
+      "sha256": "aa3d63fd17c6647be6c4b2d6467ca6282de588a8253a9d6a938a432287a8f2eb"
    },
    {
      "path": "docs/agent-manager.md",
@@ -1582,8 +1692,8 @@
    },
    {
      "path": "docs/imaging-meshing.md",
-      "bytes": 3678,
+      "bytes": 3967,
-      "sha256": "c63e434d5181dc903c83f00c7649ee2040028c6d4bda698f57da8c1c3b1416c6"
+      "sha256": "a220d1d907a0359d6a82168dee121721895950bd86d2b0ea25f6e998bf5744f3"
    },
    {
      "path": "docs/inventory.md",
@@ -1612,8 +1722,8 @@
    },
    {
      "path": "docs/release-candidate.md",
-      "bytes": 4327,
+      "bytes": 4476,
-      "sha256": "20aa8c39de842ca1dee15808c44f1e71ee33441796b17d03feea8e14ef99165f"
+      "sha256": "25e5a581235539b9145a9030b9f3af9d78f6a22cfc7587b1090f8c19b8653e26"
    },
    {
      "path": "docs/release-ci-matrix.md",
@@ -1627,8 +1737,8 @@
    },
    {
      "path": "docs/rust-api-guide.md",
-      "bytes": 12058,
+      "bytes": 12122,
-      "sha256": "db4d0ee7986eebe9434e5c51ca65a31ffc3b32323240d9dc62cbd931b21b21b1"
+      "sha256": "25d2b333be7106c68bb9d6e1a8149d8abd333566c6705af7a9fb7e97ac7163e4"
    },
    {
      "path": "docs/social.md",
@@ -2517,8 +2627,8 @@
    },
    {
      "path": "tools/ci-matrix/src/api_surface.rs",
-      "bytes": 48586,
+      "bytes": 48993,
-      "sha256": "a82ac15da446f2f393ba267f8c7537d43cb4595a6be3e08f27d2f718e2aad4e8"
+      "sha256": "2c4248ca2cb16c9ae84e25af823f5a45a3f7840519baa8f08d85c67212df8b4e"
    },
    {
      "path": "tools/ci-matrix/src/artifact.rs",
@@ -2542,8 +2652,8 @@
    },
    {
      "path": "tools/ci-matrix/src/lib.rs",
-      "bytes": 21271,
+      "bytes": 21338,
-      "sha256": "53f4286d600c78d7a3ea593e7d663854e722787573dc5bbf3e48d41e28ac8267"
+      "sha256": "cd2d54c1ee8182843af43c271ff1592040c32de254d91bd146aeb822ae3a9a4e"
    },
    {
      "path": "tools/ci-matrix/src/main.rs",
@@ -2664,13 +2774,13 @@
  "generated_release_files": [
    {
      "path": "release/DEPENDENCY-LICENSES.json",
-      "bytes": 230084,
+      "bytes": 259721,
-      "sha256": "64ee30790d4b3b643514098184bf15b2e9901fe177333dbd7950b4311a47292e"
+      "sha256": "5f80b45ab18a45365673b55b52d68318bc31f602ce2f6559f573027cc446c58e"
    },
    {
      "path": "release/THIRD-PARTY-NOTICES.md",
-      "bytes": 897381,
+      "bytes": 980767,
-      "sha256": "47d10a98d94bfe09124cbbfcf57f91a34231286aaec71a3265372ee9006d3eab"
+      "sha256": "c4d381944a9b57277963d2a5ee4e23a9a064c2ba93a676a49e023931b53a71d6"
    },
    {
      "path": "release/NATIVE-LICENSES.md",
--- a/release/THIRD-PARTY-NOTICES.md
+++ b/release/THIRD-PARTY-NOTICES.md
--- a/tools/ci-matrix/src/api_surface.rs
+++ b/tools/ci-matrix/src/api_surface.rs
@@ -932,6 +932,16 @@ fn validate_features(name: &str, actual: &BTreeMap<String, Vec<String>>) -> Resu
        ]),
        "libremetaverse-imaging-skia" => BTreeMap::from([
            ("default".to_owned(), Vec::new()),
            (
                "rust-skia".to_owned(),
                vec![
                    "dep:image-webp".to_owned(),
                    "dep:skia-rs-codec".to_owned(),
                    "skia-rs-codec/gif".to_owned(),
                    "skia-rs-codec/jpeg".to_owned(),
                    "skia-rs-codec/png".to_owned(),
                ],
            ),
            ("skia".to_owned(), vec!["dep:skia-safe".to_owned()]),
        ]),
        "libremetaverse-voice-webrtc" => BTreeMap::from([
@@ -1232,7 +1242,7 @@ The exact mapping, exported-marker, feature, and normalized Rust declaration has
 - .NET events become `subscribe_*` calls returning an owned `Subscription`; callbacks are `Send + Sync` and dispatch outside internal locks.\n\
 - `IDisposable` becomes explicit idempotent shutdown plus `Drop`; cancellation remains a typed `Error::Cancelled`.\n\
 - Closed C# enums retain fixed discriminants and are SemVer-breaking to extend; flags retain unknown bits, while public Rust error enums are `non_exhaustive`.\n\
- Optional native backends remain feature-gated (`jpeg2000`, `skia`, `vorbis`, `real-audio`); default and empty-default sets are part of the baseline.\n\
+- Optional native and pure-Rust backends remain feature-gated (`jpeg2000`, `rust-j2k`, `skia`, `rust-skia`, `vorbis`, `real-audio`); default and empty-default sets are part of the baseline.\n\
 - Capability HTTP injection uses project-owned `HttpMessageHandler`, `CapsHttpLimits`, and `with_native_transport`; the internal `reqwest` client is not part of the public surface.\n\
 - External C# signature types map to core/std, adopted cross-platform crates, or project-owned boundary types; no third-party crate path leaks through mapped signatures or public Rust declarations.\n\n\
 ## Compile consumers\n\n\
--- a/tools/ci-matrix/src/lib.rs
+++ b/tools/ci-matrix/src/lib.rs
@@ -38,7 +38,7 @@ const REQUIRED_PROFILES: [&str; 7] = [
    "windows-stable-portable",
    "macos-stable-portable",
 ];
-const REQUIRED_FEATURE_SETS: [&str; 12] = [
+const REQUIRED_FEATURE_SETS: [&str; 13] = [
    "all-features",
    "dds-bc67",
    "default",
@@ -48,11 +48,12 @@ const REQUIRED_FEATURE_SETS: [&str; 12] = [
    "no-default-features",
    "real-audio",
    "rust-j2k",
    "rust-skia",
    "skia",
    "tests",
    "vorbis",
 ];
-const REQUIRED_FEATURES: [(&str, &str); 8] = [
+const REQUIRED_FEATURES: [(&str, &str); 9] = [
    ("libremetaverse", "dds-bc67"),
    ("libremetaverse", "jpeg2000"),
    ("libremetaverse", "rust-j2k"),
@@ -60,6 +61,7 @@ const REQUIRED_FEATURES: [(&str, &str); 8] = [
    ("libremetaverse-imaging", "jpeg2000"),
    ("libremetaverse-imaging", "rust-j2k"),
    ("libremetaverse-imaging-skia", "skia"),
    ("libremetaverse-imaging-skia", "rust-skia"),
    ("libremetaverse-voice-webrtc", "real-audio"),
 ];
		`@@ -0,0 +1,3 @@`
							`524946461e000000574542505650384c110000002f0000001007d0fffef7`
							`bf7f8188e87f0000`
		`@@ -0,0 +1,2 @@`
							`424d3e000000000000003600000028000000020000000100000001002000000000000800000000000000000000000000000000000000`
							`0000ff0000ff0000`
		`@@ -0,0 +1,3 @@`
							`0000810201`
							`ffffffffffffffffffffffffffffffff80`
		`@@ -0,0 +1,2 @@`
							`524946461c000000574542505650384c0f0000002f014000000710f58ffe`
							`0722a2ff0100`
		`@@ -0,0 +1,2 @@`
							`424d3a000000000000003600000028000000020000000100000001001000000000000400000000000000000000000000000000000000`
							`007ce003`
		`@@ -0,0 +1,3 @@`
							`424d46000000000000003600000028000000020000000200000001001800000000001000000000000000000000000000000000000000`
							`ff0000ffffff00000000ff00ff000000`
		`@@ -0,0 +1,3 @@`
							`424d4600000000000000360000002800000002000000feffffff01001800000000001000000000000000000000000000000000000000`
							`0000ff00ff000000ff0000ffffff0000`