From 38402554869bdb2af6ac81bcb90070e939a41c38 Mon Sep 17 00:00:00 2001
From: Andrew Murray <radarhere@users.noreply.github.com>
Date: Tue, 25 Jun 2024 20:50:17 +1000
Subject: [PATCH] Invert alpha bit for map depth 16

---
 Tests/images/p_16.png     | Bin 378 -> 414 bytes
 Tests/test_file_tga.py    |   5 +++--
 src/PIL/TgaImagePlugin.py |   8 +++++---
 3 files changed, 8 insertions(+), 5 deletions(-)

diff --git a/Tests/images/p_16.png b/Tests/images/p_16.png
index e3588641277b804c0100707146a46a506f33d0d6..458f7138e8026159cb9e52a18088db59358e4c44 100644
GIT binary patch
literal 414
zcmeAS@N?(olHy`uVBq!ia0vp^4Is?H1|$#LC7xzrU`+LNaSW-L^Y)S>UxNY<gX5R~
z^~dBxg!A8=*?PfY)AhLQ^#@J;>}4gE|G$2o{oCumKWmr&|6dn*{vnHidV>Yy5l#g^
ohC-$eVTU;kk4A;CheS1lgtNdOv)R!Vz;I{qboFyt=akR{0D$9pJpcdz

literal 378
zcmeAS@N?(olHy`uVBq!ia0vp^4Is?H1SEZ8zRh7^V083!aSW-L^Y-FF&I1Yp3<qcY
zt2X0(;mi@qWbAM2mw0^7wPQbze)_WZZ?X0My6^h`_nT+`=wL8pOkz61(!nVptf1!L
g(=cP?3VdUj^qT*#aqOvMz%XU-boFyt=akR{06%wV2mk;8

diff --git a/Tests/test_file_tga.py b/Tests/test_file_tga.py
index ff6dab00d..15c7bbdb8 100644
--- a/Tests/test_file_tga.py
+++ b/Tests/test_file_tga.py
@@ -72,12 +72,13 @@ def test_palette_depth_8(tmp_path: Path) -> None:
 
 def test_palette_depth_16(tmp_path: Path) -> None:
     with Image.open("Tests/images/p_16.tga") as im:
-        assert_image_equal_tofile(im.convert("RGB"), "Tests/images/p_16.png")
+        assert im.palette.mode == "RGBA"
+        assert_image_equal_tofile(im.convert("RGBA"), "Tests/images/p_16.png")
 
         out = str(tmp_path / "temp.png")
         im.save(out)
         with Image.open(out) as reloaded:
-            assert_image_equal_tofile(reloaded.convert("RGB"), "Tests/images/p_16.png")
+            assert_image_equal_tofile(reloaded.convert("RGBA"), "Tests/images/p_16.png")
 
 
 def test_id_field() -> None:
diff --git a/src/PIL/TgaImagePlugin.py b/src/PIL/TgaImagePlugin.py
index 9bc483fc5..d158fe492 100644
--- a/src/PIL/TgaImagePlugin.py
+++ b/src/PIL/TgaImagePlugin.py
@@ -117,9 +117,11 @@ class TgaImageFile(ImageFile.ImageFile):
             # read palette
             start, size, mapdepth = i16(s, 3), i16(s, 5), s[7]
             if mapdepth == 16:
-                self.palette = ImagePalette.raw(
-                    "BGRA;15", b"\0" * 2 * start + self.fp.read(2 * size)
-                )
+                colormap = self.fp.read(2 * size)
+                palette_data = bytearray(b"\0" * 2 * start)
+                for a, b in zip(colormap[::2], colormap[1::2]):
+                    palette_data += bytearray((a, b ^ 128))
+                self.palette = ImagePalette.raw("BGRA;15", bytes(palette_data))
                 self.palette.mode = "RGBA"
             elif mapdepth == 24:
                 self.palette = ImagePalette.raw(