From 0c2e3777b190696a1b74ff5363a9cae158c6c1c0 Mon Sep 17 00:00:00 2001
From: Josh Holmer <jholmer.in@gmail.com>
Date: Tue, 30 Jan 2018 22:27:34 -0500
Subject: [PATCH] Refactor an if statement

---
 src/png/mod.rs | 18 ++++++------------
 1 file changed, 6 insertions(+), 12 deletions(-)

diff --git a/src/png/mod.rs b/src/png/mod.rs
index 5f1e9a90..afa163d7 100644
--- a/src/png/mod.rs
+++ b/src/png/mod.rs
@@ -271,19 +271,13 @@ impl PngData {
         for line in self.scan_lines() {
             match filter {
                 0 | 1 | 2 | 3 | 4 => {
-                    if last_pass == line.pass || filter <= 1 {
-                        filtered.push(filter);
-                        filtered.extend_from_slice(&filter_line(
-                            filter,
-                            bpp,
-                            &line.data,
-                            &last_line,
-                        ));
+                    let filter = if last_pass == line.pass || filter <= 1 {
+                        filter
                     } else {
-                        // Avoid vertical filtering on first line of each interlacing pass
-                        filtered.push(0);
-                        filtered.extend_from_slice(&filter_line(0, bpp, &line.data, &last_line));
-                    }
+                        0
+                    };
+                    filtered.push(filter);
+                    filtered.extend_from_slice(&filter_line(filter, bpp, &line.data, &last_line));
                 }
                 5 => {
                     // Heuristically guess best filter per line