From c108d9ddb033e3e70f7261b7f1b7fc9d81c00259 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 22 Jul 2023 20:00:36 +1000
Subject: [PATCH] Set alpha channel when saving LA in OpenJPEG

---
 src/libImaging/Jpeg2KEncode.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/libImaging/Jpeg2KEncode.c b/src/libImaging/Jpeg2KEncode.c
index de8586706..3295373fd 100644
--- a/src/libImaging/Jpeg2KEncode.c
+++ b/src/libImaging/Jpeg2KEncode.c
@@ -490,6 +490,8 @@ j2k_encode_entry(Imaging im, ImagingCodecState state) {
 
     if (strcmp(im->mode, "RGBA") == 0) {
         image->comps[3].alpha = 1;
+    } else if (strcmp(im->mode, "LA") == 0) {
+        image->comps[1].alpha = 1;
     }
 
     opj_set_error_handler(codec, j2k_error, context);