From 509dcbf073b3cf8c4fc3d051ebc884a6672e070b Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 19 Nov 2022 15:35:06 +1100
Subject: [PATCH 1/2] Added LightSource tag values

---
 src/PIL/ExifTags.py | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/src/PIL/ExifTags.py b/src/PIL/ExifTags.py
index c00730ba91d..3df1dbf7264 100644
--- a/src/PIL/ExifTags.py
+++ b/src/PIL/ExifTags.py
@@ -346,3 +346,27 @@ class Interop(IntEnum):
     RelatedImageFileFormat = 4096
     RelatedImageWidth = 4097
     RleatedImageHeight = 4098
+
+
+class LightSource(IntEnum):
+    Unknown = 0
+    Daylight = 1
+    Fluorescent = 2
+    Tungsten = 3
+    Flash = 4
+    Fine = 9
+    Cloudy = 10
+    Shade = 11
+    DaylightFluorescent = 12
+    DayWhiteFluorescent = 13
+    CoolWhiteFluorescent = 14
+    WhiteFluorescent = 15
+    StandardLightA = 17
+    StandardLightB = 18
+    StandardLightC = 19
+    D55 = 20
+    D65 = 21
+    D75 = 22
+    D50 = 23
+    ISO = 24
+    Other = 255

From 5c482e20af8efe0210cd7b0cfe2dec7367d03042 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Sat, 24 Dec 2022 08:32:58 +1100
Subject: [PATCH 2/2] Document new ExifTags enums

---
 docs/reference/ExifTags.rst | 10 +++++++++-
 docs/releasenotes/9.4.0.rst | 28 ++++++++++++++++++++++++++++
 2 files changed, 37 insertions(+), 1 deletion(-)

diff --git a/docs/reference/ExifTags.rst b/docs/reference/ExifTags.rst
index 650bb4f9546..464ab77ea35 100644
--- a/docs/reference/ExifTags.rst
+++ b/docs/reference/ExifTags.rst
@@ -37,7 +37,15 @@ which provide constants and clear-text names for various well-known EXIF tags.
     >>> IFD.Exif.value
     34665
     >>> IFD(34665).name
-    'Exif'
+    'Exif
+
+.. py:data:: LightSource
+
+    >>> from PIL.ExifTags import LightSource
+    >>> LightSource.Unknown.value
+    0
+    >>> LightSource(0).name
+    'Unknown'
 
 Two of these values are also exposed as dictionaries.
 
diff --git a/docs/releasenotes/9.4.0.rst b/docs/releasenotes/9.4.0.rst
index ccbe62a6bcd..7da0e61f312 100644
--- a/docs/releasenotes/9.4.0.rst
+++ b/docs/releasenotes/9.4.0.rst
@@ -45,6 +45,34 @@ removes the hidden RGB values for better compression by default in libwebp 0.5
 or later. By setting this option to ``True``, the encoder will keep the hidden
 RGB values.
 
+Added IFD, Interop and LightSource ExifTags enums
+^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
+
+:py:data:`~PIL.ExifTags.IFD` has been added, allowing enums to be used with
+:py:meth:`~PIL.Image.Exif.get_ifd`::
+
+    from PIL import Image, ExifTags
+    im = Image.open("Tests/images/flower.jpg")
+    print(im.getexif().get_ifd(ExifTags.IFD.Exif))
+
+``IFD1`` can also be used with :py:meth:`~PIL.Image.Exif.get_ifd`, but it should
+not be used in other contexts, as the enum value is only internally meaningful.
+
+:py:data:`~PIL.ExifTags.Interop` has been added for tags within the Interop IFD::
+
+    from PIL import Image, ExifTags
+    im = Image.open("Tests/images/flower.jpg")
+    interop_ifd = im.getexif().get_ifd(ExifTags.IFD.Interop)
+    print(interop_ifd.get(ExifTags.Interop.InteropIndex))  # R98
+
+:py:data:`~PIL.ExifTags.LightSource` has been added for values within the LightSource
+tag::
+
+    from PIL import Image, ExifTags
+    im = Image.open("Tests/images/iptc.jpg")
+    exif_ifd = im.getexif().get_ifd(ExifTags.IFD.Exif)
+    print(ExifTags.LightSource(exif_ifd[0x9208]))  # LightSource.Unknown
+
 getxmp()
 ^^^^^^^^