Prevent TIFFRGBAImageBegin from applying image orientation

radarhere · Nov 16, 2024 · 5ca4877 · 5ca4877
1 parent 5bff2f3
commit 5ca4877
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diff --git a/Tests/test_file_libtiff.py b/Tests/test_file_libtiff.py
@@ -1030,6 +1030,17 @@ def test_old_style_jpeg(self) -> None:
         with Image.open("Tests/images/old-style-jpeg-compression.tif") as im:
             assert_image_equal_tofile(im, "Tests/images/old-style-jpeg-compression.png")
 
+    def test_old_style_jpeg_orientation(self) -> None:
+        with open("Tests/images/old-style-jpeg-compression.tif", "rb") as fp:
+            data = fp.read()
+
+            # Set EXIF Orientation to 2
+            data = data[:102] + b"\x02" + data[103:]
+
+            with Image.open(io.BytesIO(data)) as im:
+                im = im.transpose(Image.Transpose.FLIP_LEFT_RIGHT)
+            assert_image_equal_tofile(im, "Tests/images/old-style-jpeg-compression.png")
+
     def test_open_missing_samplesperpixel(self) -> None:
         with Image.open(
             "Tests/images/old-style-jpeg-compression-no-samplesperpixel.tif"

diff --git a/src/libImaging/TiffDecode.c b/src/libImaging/TiffDecode.c
@@ -299,6 +299,7 @@ _decodeAsRGBA(Imaging im, ImagingCodecState state, TIFF *tiff) {
         return -1;
     }
 
+    img.orientation = ORIENTATION_TOPLEFT;
     img.req_orientation = ORIENTATION_TOPLEFT;
     img.col_offset = 0;