From 262e11d9f4018ee89aacd153141f444b6db025a2 Mon Sep 17 00:00:00 2001
From: maryla-uc <91276487+maryla-uc@users.noreply.github.com>
Date: Thu, 31 Aug 2023 16:13:15 +0200
Subject: [PATCH] Add gain maps to CHANGELOG.md (#1536)

---
 CHANGELOG.md | 12 ++++++++++++
 1 file changed, 12 insertions(+)

diff --git a/CHANGELOG.md b/CHANGELOG.md
index 7df4c1f707..7a1ecc248c 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,18 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+### Added
+* Add experimental API for reading and writing gain maps in AVIF files.
+  If enabled at compile time, add `gainMap` field to `avifImage`,
+  `qualityGainMap` field to `avifEncoder`, and `gainMapPresent` to
+  `avifDecoder`.
+  Gain maps allow readers that support them to display HDR images that look
+  good on both HDR and SDR displays.
+  This feature is highly experimental. The API might change or be removed
+  in the future. Files created now might not decode in a future version.
+  This feature is off by default and must be enabled with the
+  AVIF_ENABLE_EXPERIMENTAL_GAIN_MAP compilation flag.
+
 ### Changed
 * Update svt.cmd/svt.sh: v1.7.0
 * Update zlibpng.cmd: zlib 1.3 and libpng 1.6.40