From e689acfee04c7f7be671228a1339c3d82f6fd89f Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 28 Jun 2025 00:34:30 +1000
Subject: [PATCH] For DXT1, only check if 8 bytes are left

---
 src/libImaging/BcnEncode.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/libImaging/BcnEncode.c b/src/libImaging/BcnEncode.c
index 7a5072dde..93fb9e41a 100644
--- a/src/libImaging/BcnEncode.c
+++ b/src/libImaging/BcnEncode.c
@@ -257,9 +257,9 @@ ImagingBcnEncode(Imaging im, ImagingCodecState state, UINT8 *buf, int bytes) {
 
     UINT8 *dst = buf;
 
+    int will_write = (n == 2 || n == 3 || n == 5) ? 16 : 8;
     for (;;) {
-        // Loop writes a max of 16 bytes per iteration
-        if (dst + 16 >= bytes + buf) {
+        if (dst + will_write >= bytes + buf) {
             break;
         }
         if (n == 5) {