From e3df1ff195d18544c60c7cf17bb79e10644579f3 Mon Sep 17 00:00:00 2001
From: justnullname <51329027+justnullname@users.noreply.github.com>
Date: Fri, 3 Apr 2026 10:59:15 +0000
Subject: [PATCH] Fix AVIF HDR gain map decoding crash

Explicitly set `decoder->imageContentToDecode |= AVIF_IMAGE_CONTENT_GAIN_MAP`
after creating the AVIF decoder in `CImageLoader`.

This is required for `libavif` version 1.4.0 (and newer), where gain
maps are no longer parsed or decoded by default unless requested
via the `imageContentToDecode` field. Without this, attempting to
apply tone mapping via `avifImageApplyGainMap` results in a crash due
to missing gain map data.
---
 QuickView/ImageLoader.cpp | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/QuickView/ImageLoader.cpp b/QuickView/ImageLoader.cpp
index 03bfe69..12599b7 100644
--- a/QuickView/ImageLoader.cpp
+++ b/QuickView/ImageLoader.cpp
@@ -5922,6 +5922,8 @@ namespace QuickView {
                 avifDecoder* decoder = avifDecoderCreate();
                 if (!decoder) return E_OUTOFMEMORY;
 
+                decoder->imageContentToDecode |= AVIF_IMAGE_CONTENT_GAIN_MAP;
+
                 decoder->strictFlags = AVIF_STRICT_DISABLED;
                 const unsigned int threads = std::thread::hardware_concurrency();
                 decoder->maxThreads = threads > 0 ? threads : 4;