More precise bit depth expanding

image-rs · Nov 2, 2024 · 092879c · 092879c
1 parent 7f78d82
commit 092879c
Showing 1 changed file with 1 addition and 1 deletion.
diff --git a/src/codecs/avif/decoder.rs b/src/codecs/avif/decoder.rs
@@ -545,7 +545,7 @@ impl<R: Read> AvifDecoder<R> {
         // Expand current bit depth to target 16
         let target_expand_bits = 16u32 - self.picture.bit_depth() as u32;
         for item in target.iter_mut() {
-            *item <<= target_expand_bits;
+            *item = (*item << target_expand_bits) | (*item >> (16 - target_expand_bits));
         }
 
         Ok(())