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

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
-//! `WebP` decoding.
+//! Enable `skia` or the fully native-Rust `rust-skia` alternative for bounded
+//! `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)
+    }
+}