From e0e90a7da7713c1b4e75bd5719a716f4fcaca588 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?Kornel=20Lesi=C5=84ski?= <kornel@geekhood.net>
Date: Tue, 13 Nov 2018 20:42:56 +0000
Subject: [PATCH] Compress alpha with strategy sensitive to repetitions

---
 src/png/mod.rs | 3 ++-
 1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/src/png/mod.rs b/src/png/mod.rs
index 56c682e1..50665e42 100644
--- a/src/png/mod.rs
+++ b/src/png/mod.rs
@@ -20,7 +20,8 @@ use std::iter::Iterator;
 use std::path::Path;
 
 const STD_COMPRESSION: u8 = 8;
-const STD_STRATEGY: u8 = 2; // Huffman only
+/// Must use normal compression, as faster ones (Huffman/RLE-only) are not representative
+const STD_STRATEGY: u8 = 0;
 const STD_WINDOW: u8 = 15;
 const STD_FILTERS: [u8; 2] = [0, 5];