From 0879f678d56b44d2ece81ae90ee758af567b5a62 Mon Sep 17 00:00:00 2001
From: Andrew <andrew@digerati.co.nz>
Date: Tue, 9 May 2023 20:31:48 +1200
Subject: [PATCH] Attempt expand bit depth

---
 src/reduction/mod.rs | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/reduction/mod.rs b/src/reduction/mod.rs
index e07f57db..f53a8f3c 100644
--- a/src/reduction/mod.rs
+++ b/src/reduction/mod.rs
@@ -57,6 +57,15 @@ pub(crate) fn perform_reductions(
         }
     }
 
+    // Attempt to expand the bit depth to 8
+    // This does need to be evaluated but will be done so later when it gets reduced again
+    if opts.bit_depth_reduction && !deadline.passed() {
+        if let Some(reduced) = expanded_bit_depth_to_8(&png) {
+            png = Arc::new(reduced);
+            reduction_occurred = true;
+        }
+    }
+
     // Attempt to reduce the palette
     // This may change bytes but should always be beneficial
     if opts.palette_reduction && !deadline.passed() {