Add missing read/write for MHC2Tag

Cargo.toml

@@ -1,6 +1,6 @@
 [package]
 name = "lcms2"
-version = "6.0.4"
+version = "6.1.0"
 authors = ["Kornel Lesiński <[email protected]>"]
 description = "ICC color profile handling. Rusty wrapper for Little CMS"
 keywords = ["icc", "profile", "color", "lcms"]

src/lib.rs

@@ -98,6 +98,7 @@ pub enum Tag<'a> {
     UcrBg(&'a ffi::UcrBg),
     VcgtCurves([&'a ToneCurveRef; 3]),
     VideoSignal(&'a ffi::VideoSignalType),
+    MHC2(&'a ffi::MHC2Type),
     /// Unknown format or missing data
     None,
 }

src/tag.rs

@@ -108,6 +108,9 @@ impl<'a> Tag<'a> {
             (CicpTag, &Tag::VideoSignal(data)) => {
                 data as *const ffi::VideoSignalType as *const u8
             },
+            (MHC2Tag, &Tag::MHC2(data)) => {
+                data as *const ffi::MHC2Type as *const u8
+            },
             (sig, _) => panic!("Signature type {sig:?} does not support this tag data type"),
         }
     }
@@ -189,6 +192,8 @@ impl<'a> Tag<'a> {
                 ])
             },
             ViewingConditionsTag => Tag::ICCViewingConditions(cast(data)),
+            CicpTag => Tag::VideoSignal(cast(data)),
+            MHC2Tag => Tag::MHC2(cast(data)),
             _ => Tag::None,
         }
     }