From af1d2a51b37e7e57b39ee5a0e17cec275ef09a78 Mon Sep 17 00:00:00 2001
From: Frankie Dintino <fdintino@gmail.com>
Date: Wed, 2 Apr 2025 21:56:24 -0400
Subject: [PATCH] fix: conversion of AVIF image rotation property to EXIF
 orientation

This implements a fix for the issue identified in
AOMediaCodec/libavif#2727 and fixed in AOMediaCodec/libavif#2729. The
code to convert irot and imir properties to EXIF orientation when
decoding AVIF images in Pillow was repurposed from libavif, so it
suffers the same bug.
---
 src/_avif.c | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/src/_avif.c b/src/_avif.c
index eabd9958e..72b0997ec 100644
--- a/src/_avif.c
+++ b/src/_avif.c
@@ -59,7 +59,7 @@ irot_imir_to_exif_orientation(const avifImage *image) {
                 return axis ? 7   // 90 degrees anti-clockwise then swap left and right.
                             : 5;  // 90 degrees anti-clockwise then swap top and bottom.
             }
-            return 6;  // 90 degrees anti-clockwise.
+            return 8;  // 90 degrees anti-clockwise.
         }
         if (angle == 2) {
             if (imir) {
@@ -75,7 +75,7 @@ irot_imir_to_exif_orientation(const avifImage *image) {
                            ? 5   // 270 degrees anti-clockwise then swap left and right.
                            : 7;  // 270 degrees anti-clockwise then swap top and bottom.
             }
-            return 8;  // 270 degrees anti-clockwise.
+            return 6;  // 270 degrees anti-clockwise.
         }
     }
     if (imir) {