From 6b3d4588c9ca6bf93674ca59e2334e2e78823355 Mon Sep 17 00:00:00 2001
From: Ted Unangst <tedu@tedunangst.com>
Date: Mon, 29 Apr 2019 18:14:41 -0400
Subject: [PATCH] fix alpha channel in rescale. gah, that was ugly.

---
 image.go | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/image.go b/image.go
index 9983d81..170477c 100644
--- a/image.go
+++ b/image.go
@@ -58,7 +58,7 @@ func blend(d []byte, s1, s2, s3, s4 int) byte {
 }
 
 func squish(d []byte, s1, s2, s3, s4 int) byte {
-	return uint8((uint32(s1) + uint32(s2)) / 2)
+	return uint8((uint32(d[s1]) + uint32(d[s2]) + uint32(d[s3]) + uint32(d[s4])) / 4)
 }
 
 func vacuumwrap(img image.Image, format string) ([]byte, string, error) {