From 5e4b4eb646cbe1ae5a642ca8bb609c8be5a70adf Mon Sep 17 00:00:00 2001
From: June McEnroe <june@causal.agency>
Date: Fri, 16 Feb 2018 20:20:57 -0500
Subject: Fix pngo glitch

Basically changing the filter type without actually recalculating the
bytes results in some interesting stuff.
---
 bin/pngo.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

(limited to 'bin/pngo.c')

diff --git a/bin/pngo.c b/bin/pngo.c
index 47a7ad80..bd39d6bd 100644
--- a/bin/pngo.c
+++ b/bin/pngo.c
@@ -309,7 +309,7 @@ static void filterData(struct Header header, const struct Scanline *lines) {
     for (uint32_t y = header.height - 1; y < header.height; --y) {
         // TODO: Filter type heuristic.
         *lines[y].type = FILT_PAETH;
-        for (uint32_t i = (bpp * header.width) - 1; i < bpp * header.width; ++i) {
+        for (uint32_t i = (bpp * header.width) - 1; i < bpp * header.width; --i) {
             lines[y].data[i] = filt(*lines[y].type, filterBytes(lines, bpp, y, i));
         }
     }
-- 
cgit 1.4.1