feat: capture EXIF, XML/XMP, and JUMBF metadata

AUTHORS

@@ -26,9 +26,10 @@ Jonathan Brown (Jonnyawsom3) <jonathanbr30@gmail.com>
 Louis Dispa <louis.dispa@outlook.fr>
 Luca Versari
 Martin Bruse <zondolfin@gmail.com>
+Matthew Little <zone117x@gmail.com>
 Moritz Firsching
 Mrmaxmeier <3913977+Mrmaxmeier@users.noreply.github.com>
 Sami Boukortt
 Tomáš Král <tomas@kral.hk>
 Wonwoo Choi <chwo9843@gmail.com>
-Zoltan Szabadka
+Zoltan Szabadka

jxl/Cargo.toml

@@ -25,6 +25,7 @@ jxl_simd = { path = "../jxl_simd", version = "=0.3.0" }
 
 [dev-dependencies]
 arbtest = "0.3.2"
+brotli = "8.0"
 paste = "1.0.15"
 rand = "0.9.2"
 rand_xorshift = "0.4.0"

jxl/src/api/data_types.rs

@@ -264,3 +264,13 @@ pub struct JxlFrameHeader {
     /// Frame size (width, height)
     pub size: (usize, usize),
 }
+
+/// Captured metadata box from a JXL container.
+#[derive(Clone, Debug)]
+pub struct JxlMetadataBox {
+    /// Raw box content bytes.
+    pub data: Vec<u8>,
+    /// True if this was a Brotli-compressed (brob) box.
+    /// Caller must decompress if needed.
+    pub is_brotli_compressed: bool,
+}