From f3dd3d1875291a7341276df040312ccacb079aae Mon Sep 17 00:00:00 2001
From: Maryla <maryla@google.com>
Date: Thu, 14 Dec 2023 14:12:35 +0100
Subject: [PATCH] Refuse to tone map images with altICC set.

---
 src/gainmap.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/gainmap.c b/src/gainmap.c
index e1c84badfc..6801b5ebe2 100644
--- a/src/gainmap.c
+++ b/src/gainmap.c
@@ -286,7 +286,7 @@ avifResult avifImageApplyGainMap(const avifImage * baseImage,
 {
     avifDiagnosticsClearError(diag);
 
-    if (baseImage->icc.size > 0) {
+    if (baseImage->icc.size > 0 || gainMap->altICC.size > 0) {
         avifDiagnosticsPrintf(diag, "Tone mapping for images with ICC profiles is not supported");
         return AVIF_RESULT_NOT_IMPLEMENTED;
     }