Add warning when interlacing was not enabled as requested

shssoichiro · Jan 16, 2025 · 6c7ab5d · 6c7ab5d
1 parent 3a6b792
commit 6c7ab5d
Showing 1 changed file with 4 additions and 0 deletions.
diff --git a/src/lib.rs b/src/lib.rs
@@ -399,6 +399,10 @@ fn optimize_png(
         );
     }
 
+    if opts.interlace == Some(Interlacing::Adam7) && png.raw.ihdr.interlaced != Interlacing::Adam7 {
+        warn!("Interlacing was not enabled as it would result in a larger file. To override this, use `--force`.");
+    }
+
     #[cfg(feature = "sanity-checks")]
     assert!(sanity_checks::validate_output(&output, original_data));